236 results on '"Snehal S. Patel"'
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2. Conventional and Novel Diagnostic Tools for the Diagnosis of Emerging SARS-CoV-2 Variants
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Vivek P. Chavda, Disha D. Valu, Palak K. Parikh, Nikita Tiwari, Abu Sufiyan Chhipa, Somanshi Shukla, Snehal S. Patel, Pankti C. Balar, Ana Cláudia Paiva-Santos, and Vandana Patravale
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COVID-19 ,variant of concern ,variant ,diagnosis ,detection ,nano-diagnosis ,Medicine - Abstract
Accurate identification at an early stage of infection is critical for effective care of any infectious disease. The “coronavirus disease 2019 (COVID-19)” outbreak, caused by the virus “Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)”, corresponds to the current and global pandemic, characterized by several developing variants, many of which are classified as variants of concern (VOCs) by the “World Health Organization (WHO, Geneva, Switzerland)”. The primary diagnosis of infection is made using either the molecular technique of RT-PCR, which detects parts of the viral genome’s RNA, or immunodiagnostic procedures, which identify viral proteins or antibodies generated by the host. As the demand for the RT-PCR test grew fast, several inexperienced producers joined the market with innovative kits, and an increasing number of laboratories joined the diagnostic field, rendering the test results increasingly prone to mistakes. It is difficult to determine how the outcomes of one unnoticed result could influence decisions about patient quarantine and social isolation, particularly when the patients themselves are health care providers. The development of point-of-care testing helps in the rapid in-field diagnosis of the disease, and such testing can also be used as a bedside monitor for mapping the progression of the disease in critical patients. In this review, we have provided the readers with available molecular diagnostic techniques and their pitfalls in detecting emerging VOCs of SARS-CoV-2, and lastly, we have discussed AI-ML- and nanotechnology-based smart diagnostic techniques for SARS-CoV-2 detection.
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- 2023
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3. Ameliorative Effect of a Neoteric Regimen of Catechin plus Cetirizine on Ovalbumin-Induced Allergic Rhinitis in Rats
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Mohamed A. Morsy, Snehal S. Patel, Anita Bakrania, Mahmoud Kandeel, Anroop B. Nair, Jigar N. Shah, Sabah H. Akrawi, and Mahmoud El-Daly
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allergic rhinitis ,antihistamine ,catechin ,cetirizine ,histidine decarboxylase inhibitor ,Science - Abstract
Allergic rhinitis (AR) affects 20–50% of the global population. Available treatments are limited by their adverse effects. We investigated the anti-allergic effects of catechin alone and combined with cetirizine against ovalbumin-induced AR. Rats were sensitized with ovalbumin and received catechin (14 days) and then challenged with aerosolized ovalbumin (1%) to determine AR clinical scores. Histamine, histamine release, and histidine decarboxylase (HDC) activity were determined in blood, peritoneal mast cells, and stomachs, respectively. Vascular permeability and safety were assessed using Evans blue leakage and barbiturate-induced sleeping-time assays, respectively. Catechin and cetirizine binding with HDC was investigated by docking and binding energy analyses. The clinical scores of the combination regimen were superior to either drug alone. All treatments reduced vascular leakage, with no effect on barbiturate-induced sleeping time. Only the catechin-treated rats showed reduced histamine levels and HDC activity. Docking studies revealed that catechin has a 1.34-fold higher extra-precision docking score than L-histidine. The binding energy scores for catechin-HDC, L-histidine-HDC, and histamine-HDC were −50.86, −37.64, and −32.27 kcal/mol, respectively. The binding pattern of catechin was comparable to the standard HDC inhibitor, histidine methyl ester, but with higher binding free energy. Catechin binds the catalytic residue S354, unlike cetirizine. The anti-allergic effects of catechin can be explained by HDC inhibition and possible antihistaminic activity.
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- 2022
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4. Computational and Biological Comparisons of Plant Steroids as Modulators of Inflammation through Interacting with Glucocorticoid Receptor
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Mohamed A. Morsy, Snehal S. Patel, Azza A. K. El-Sheikh, Jignasa K. Savjani, Anroop B. Nair, Jigar N. Shah, and Katharigatta N. Venugopala
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Pathology ,RB1-214 - Abstract
Despite the usefulness of glucocorticoids, they may cause hazardous side effects that limit their use. Searching for compounds that are as equally efficient as glucocorticoids, but with less side effects, the current study compared plant steroids, namely, glycyrrhetinic acid, guggulsterone, boswellic acid, withaferin A, and diosgenin with the classical glucocorticoid, fluticasone. This was approached both in silico using molecular docking against glucocorticoid receptor (GR) and in vivo in two different animal models. All tested compounds interacted with GR, but only boswellic acid and withaferin A showed docking results comparable to fluticasone, as well as similar in vivo anti-inflammatory effects, by significantly decreasing serum levels of interleukin-6 and tumor necrosis factor-α in cotton pellet-induced granuloma in rats. In addition, both compounds significantly decreased the percent of change in ear weight in croton oil-induced ear edema in mice and the granuloma weight in cotton pellet-induced granuloma in rats, to levels comparable to that of fluticasone. Both boswellic acid and withaferin A had no effect on adrenal index, but only withaferin A significantly increased the thymus index. In conclusion, boswellic acid may have comparable anti-inflammatory effects to fluticasone with fewer side effects.
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- 2019
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5. Clarithromycin Solid Lipid Nanoparticles for Topical Ocular Therapy: Optimization, Evaluation and In Vivo Studies
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Anroop B. Nair, Jigar Shah, Bandar E. Al-Dhubiab, Shery Jacob, Snehal S. Patel, Katharigatta N. Venugopala, Mohamed A. Morsy, Sumeet Gupta, Mahesh Attimarad, Nagaraja Sreeharsha, and Pottathil Shinu
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clarithromycin ,solid lipid nanoparticles ,optimization ,permeation ,pharmacokinetics ,Pharmacy and materia medica ,RS1-441 - Abstract
Solid lipid nanoparticles (SLNs) are being extensively exploited as topical ocular carrier systems to enhance the bioavailability of drugs. This study investigated the prospects of drug-loaded SLNs to increase the ocular permeation and improve the therapeutic potential of clarithromycin in topical ocular therapy. SLNs were formulated by high-speed stirring and the ultra-sonication method. Solubility studies were carried out to select stearic acid as lipid former, Tween 80 as surfactant, and Transcutol P as cosurfactant. Clarithromycin-loaded SLN were optimized by fractional factorial screening and 32 full factorial designs. Optimized SLNs (CL10) were evaluated for stability, morphology, permeation, irritation, and ocular pharmacokinetics in rabbits. Fractional factorial screening design signifies that the sonication time and amount of lipid affect the SLN formulation. A 32 full factorial design established that both factors had significant influences on particle size, percent entrapment efficiency, and percent drug loading of SLNs. The release profile of SLNs (CL9) showed ~80% drug release in 8 h and followed Weibull model kinetics. Optimized SLNs (CL10) showed significantly higher permeation (30.45 μg/cm2/h; p < 0.0001) as compared to control (solution). CL10 showed spherical shape and good stability and was found non-irritant for ocular administration. Pharmacokinetics data demonstrated significant improvement of clarithromycin bioavailability (p < 0.0001) from CL10, as evidenced by a 150% increase in Cmax (~1066 ng/mL) and a 2.8-fold improvement in AUC (5736 ng h/mL) (p < 0.0001) as compared to control solution (Cmax; 655 ng/mL and AUC; 2067 ng h/mL). In summary, the data observed here demonstrate the potential of developed SLNs to improve the ocular permeation and enhance the therapeutic potential of clarithromycin, and hence could be a viable drug delivery approach to treat endophthalmitis.
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- 2021
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6. Development of HPLC Method for Quantification of Sinigrin from Raphanus sativus Roots and Evaluation of Its Anticancer Potential
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Anroop B. Nair, Dipal Gandhi, Snehal S. Patel, Mohamed A. Morsy, Bapi Gorain, Mahesh Attimarad, and Jigar N. Shah
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Sinigrin ,RP-HPLC ,quantification ,method validation ,cytotoxicity ,apoptosis ,Organic chemistry ,QD241-441 - Abstract
Sinigrin, a precursor of allyl isothiocyanate, present in the Raphanus sativus exhibits diverse biological activities, and has an immense role against cancer proliferation. Therefore, the objective of this study was to quantify the sinigrin in the R. sativus roots using developed and validated RP-HPLC method and further evaluated its’ anticancer activity. To achieve the objective, the roots of R. sativus were lyophilized to obtain a stable powder, which were extracted and passed through an ion-exchange column to obtain sinigrin-rich fraction. The RP-HPLC method using C18 analytical column was used for chromatographic separation and quantification of sinigrin in the prepared fraction, which was attained using the mobile phase consisting of 20 mM tetrabutylammonium: acetonitrile (80:20%, v/v at pH 7.0) at a flow rate of 0.5 mL/min. The chromatographic peak for sinigrin was showed at 3.592 min for pure sinigrin, where a good linearity was achieved within the concentration range of 50 to 800 µg/mL (R2 > 0.99), with an excellent accuracy (−1.37% and −1.29%) and precision (1.43% and 0.94%), for intra and inter-day, respectively. Finally, the MTT assay was performed for the sinigrin-rich fraction using three different human cancer cell lines, viz. prostate cancer (DU-145), colon adenocarcinoma (HCT-15), and melanoma (A-375). The cell-based assays were extended to conduct apoptotic and caspase-3 activities, to determine the mechanism of action of sinigrin in the treatment of cancer. MTT assay showed IC50 values of 15.88, 21.42, and 24.58 µg/mL for DU-145, HCT-15, and A-375 cell lines, respectively. Increased cellular apoptosis and caspase-3 expression were observed with sinigrin-rich fraction, indicating significant increase in overexpression of caspase-3 in DU-145 cells. In conclusion, a simple, sensitive, fast, and accurate RP-HPLC method was developed for the estimation of sinigrin in the prepared fraction. The data observed here indicate that sinigrin can be beneficial in treating prostate cancer possibly by inducing apoptosis.
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- 2020
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7. Role of β-Interferon Inducer (DEAE-Dextran) in Tumorigenesis by VEGF and NOTCH1 Inhibition along with Apoptosis Induction
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Anita K. Bakrania, Bhavesh C. Variya, and Snehal S. Patel
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DEAE-Dextran ,β-interferon ,TNBC ,anti-proliferative ,apoptosis ,angiogenesis ,Therapeutics. Pharmacology ,RM1-950 - Abstract
As a novel target for breast cancer, interferon inducers have found its role as anti-angiogenic agents with diethylaminoethyl dextran (DEAE-Dextran) being a molecule used for centuries as a transfection agent. Our results herein offer an explanation for the emergence of DEAE-Dextran as an anti-tumor agent for TNBC with in-depth mechanistic approach as an anti-angiogenic molecule. DEAE-Dextran has found to possess cytotoxic activity demonstrated during the various in vitro cytotoxicity assays; moreover, as an anti-oxidant, DEAE-Dextran has shown to possess excellent reactive oxygen species scavenging activity. The interferon inducing capacity of DEAE-Dextran was determined qualitatively as well as quantitatively specifically demonstrating overexpression of β-interferon. As a measure of anti-proliferative activity, DEAE-Dextran exhibited reduced ki67, p53, and PCNA levels. Also, overexpression of CK5/6 and p63 in DEAE-Dextran treated animals indicated improvement in breast cell morphology along with an improvement in cell–cell adhesion by virtue of upregulation of β-catenin and E-cadherin. Anti-angiogenic property of DEAE-Dextran was concluded by the downregulation of CD31, VEGF, and NOTCH1 both in vivo and in vitro. Further, apoptosis due to DEAE-Dextran, initially determined by downregulation of Bcl2, was confirmed with flow cytometry. Overall, results are defensive of DEAE-Dextran as an emerging anti-tumor agent with mechanisms pertaining to β-interferon induction with probable VEGF and NOTCH1 inhibition as well as apoptosis which still needs to be studied in further depth.
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- 2017
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8. Ethanolic extract of Azadirachta indica ameliorates ovarian defects through phosphoinositide-3 kinase inhibition in a rat model of polycystic ovary syndrome
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Shraddha V Patel, Harsh Maru, Vishal K Chavda, Jigar N Shah, and Snehal S Patel
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azadirachta indica ,pi3 kinase ,quercetin ,steroidogenesis ,testosterone propionate ,wartmannin ,Medicine - Abstract
Objective: To assess the therapeutic potential of ethanolic extract of Azadirachta (A.) indica in rats with polycystic ovary syndrome (PCOS). Methods: Thirty-five prepubertal female Sprague Dawley rats were randomly divided into five groups with 7 animals in each group. Group 1 received 0.5% carboxy methyl cellulose orally. Groups 2 to 5 received testosterone propionate (0.2 mg/kg, s.c.) dissolved in olive oil daily for 42 days to induce PCOS. In addition, group 3 was administered with A. indica extract (100 mg/kg, 0.5% carboxy methyl cellulose orally) from the 7th to 12th week, group 4 received quercetin (100 mg/kg, 0.5% carboxy methyl cellulose orally) and group 5 received wartmannin (100 mg/kg, 0.5% carboxy methyl cellulose orally). At the end of treatment, blood was collected for biochemical evaluation. Total follicular count and uterus corpus luteum count followed by PI3K gene expression in the ovary and uterus were evaluated. Results: The ethanolic extracts of A. indica significantly reduced body weight, ovary weight and uterus weight of rats. Extracts of A. indica also significantly increased the levels of serum glucose, total cholesterol, triglyceride, low-density lipoprotein, very low-density lipoprotein, insulin, testosterone, and luteinizing hormone. Treatment also reduced lipid peroxidation and increased antioxidant parameters in the liver homogenates of PCOS-induced rats. Histological examination of the ovary and uterus confirmed PCOS occurrence and remission state in the PCOS-induced and treated groups, respectively. Moreover, A. indica and quercetin significantly downregulated PI3K gene expression. Histopathological results of the ovary and uterus also proved the protective role of A. indica. Conclusions: A. indica leaf extract has beneficial effects in the treatment of PCOS by downregulation of PI3K gene expression.
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- 2021
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9. Future treatment of Diabetes – Tyrosine Kinase inhibitors
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Aakash Kumar S, Snehal S Patel, Shreya Patel, and Palak Parikh
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Endocrinology, Diabetes and Metabolism ,Internal Medicine - Published
- 2022
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10. Functional Role of Novel Anthranilic Acid Derivatives as Anti-inflammatory Agents
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Mohamed A Morsy, Snehal S Patel, Pranali Parmar, Jignasa K Savjani, Mahmoud Kandeel, Anroop B Nair, Sabah H Akrawi, and Mahmoud El-Daly
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General Pharmacology, Toxicology and Pharmaceutics - Published
- 2022
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11. Abstract OT1-18-07: A randomized, multicenter, placebo-controlled, phase III study to evaluate the efficacy and safety of HER2/neu peptide GLSI-100 (GP2 + GM-CSF) in patients with residual disease or high-risk PCR after both neo-adjuvant and postoperative adjuvant anti-HER2 therapy
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Snehal S Patel, David B McWilliams, Christine T Fischette, Jaye Thompson, F. Joseph Daugherty, C. Kent Osborne, and Mothaffar F Rimawi
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Cancer Research ,Oncology - Abstract
Background: GP2 is a biologic nine amino acid peptide of the HER2/neu protein delivered in combination with an FDA-approved immunoadjuvant Granulocyte-Macrophage Colony Stimulating Factor (GM-CSF, Sargramostim, Leukine) that stimulates an immune response targeting HER2/neu expressing cancers. In a prospective, randomized, single-blinded, placebo-controlled, multicenter Phase IIb clinical trial, no recurrences were observed in the HER2/neu positive adjuvant setting after median 5 years of follow-up, if the HLA-A*02 patient received the 6 primary intradermal GLSI-100 injections over the first 6 months (p = 0.0338) in a pre-specified subgroup analysis. Furthermore, the immunotherapy elicited a potent immune response measured by local skin tests and immunological assays. Of the 138 patients that have been treated with GLSI-100 to date over 4 clinical trials, GLSI-100 was well-tolerated and no serious adverse events were observed related to the immunotherapy. This Phase III trial aims to reproduce the Phase IIb trial and will explore the use of GLSI-100 as adjuvant therapy to increase invasive disease-free survival in HER2/neu positive and HLA-A*02 patients, post-surgery and following the first year of treatment with any trastuzumab-based therapy. Method: This Phase 3 trial is a prospective, randomized, double-blinded, multi-center study. After 1 year of trastuzumab-based therapy or an approved biosimilar, 6 intradermal injections of GLSI-100 or placebo (Bacteriostatic Saline/WFI) will be administered for the primary immunization series over the first 6 months and 5 subsequent boosters will be administered over the next 2.5 years for a total of 11 injections over 3 years of treatment. The participant duration of the trial will be 3 years treatment plus 1 additional year follow-up for a total of 4 years following the first year of treatment with trastuzumab-based therapy. An interim analysis is planned, and patients will be stratified based on prior and current treatments. Study Size - Interim Analysis: Approximately 498 patients will be enrolled. To detect a hazard ratio of 0.3 in IDFS, 28 events will be required. An interim analysis for superiority and futility will be conducted when at least half of those events, 14, have occurred. This sample size provides 80% power if the annual rate of events in placebo-treated patients is 2.4% or greater. Eligibility Criteria: The patient population is defined by these key eligibility criteria: Trial Objectives: Contact information: Website: greenwichlifesciences.com. Funding: This trial is supported by Greenwich LifeSciences. Citation Format: Snehal S Patel, David B McWilliams, Christine T Fischette, Jaye Thompson, F. Joseph Daugherty, C. Kent Osborne, Mothaffar F Rimawi. A randomized, multicenter, placebo-controlled, phase III study to evaluate the efficacy and safety of HER2/neu peptide GLSI-100 (GP2 + GM-CSF) in patients with residual disease or high-risk PCR after both neo-adjuvant and postoperative adjuvant anti-HER2 therapy [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr OT1-18-07.
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- 2022
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12. Abstract P2-13-29: Analysis of GP2 immune response and relationship to recurrence in a prospective, randomized, placebo-controlled, single-blinded, multicenter, phase IIb study evaluating the reduction of recurrences using HER2/neu peptide GP2 (GLSI-100) vs. GM-CSF alone after adjuvant trastuzumab in HER2 positive women with operable breast cancer
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Snehal S Patel, David B McWilliams, Mira S Patel, Christine T Fischette, Jaye Thompson, and F. Joseph Daugherty
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Cancer Research ,Oncology - Abstract
Background: Delayed type hypersensitivity (DTH) skin tests in the randomized, active-controlled, single-blinded, multicenter Phase IIb trial investigating GLSI-100 (GP2+GM-CSF) administered in the adjuvant setting to node-positive and high-risk node-negative breast cancer patients with tumors expressing any degree of HER2 (immuno-histochemistry [IHC] 1-3+) (NCT00524277) have been analyzed. The trial enrolled HLA-A*02 patients randomized to receive GLSI-100 versus GM-CSF alone. The trial's primary objective was to determine if treatment with GLSI-100, a HER2-derived peptide, reduces recurrence rates. Analyses for this trial showing GLSI-100 to be efficacious, safe and immunogenic have been previously reported by Patel et al. and Mittendorf et al.. Methods: Consented patients were randomized and scheduled to receive GLSI-100 (500 mcg GP2: 125 mcg GM-CSF) or control (GM-CSF only) via 6 intradermal injections every 3-4 weeks as part of the Primary Immunization Series (PIS) for the first 6 months and 4 booster intradermal injections every 6 months thereafter. Boosters were introduced during the trial, thus some patients did not receive all 4 boosters. DTH skin tests were assessed at baseline and after the 6th dose with the orthogonal mean of each skin reaction measured 48-72 hours after injection using the sensitive ballpoint-pen method.. Results: The study enrolled 180 patients across 16 clinical sites with both HER2 3+ positive and low HER2 expressors (1-2+). After 5 years of follow-up, the Kaplan-Meier estimated 5-year DFS rate in the 46 HER2 3+ patients treated with GLSI-100, if the patient completed the PIS, was 100% versus 89.4% (95% CI:76.2, 95.5%) in the 50 placebo patients treated with GM-CSF (p = 0.0338). GLSI-100 was shown to be well tolerated with no SAEs deemed related to study medication and elicited a potent immune response measured by local skin tests and immunological assays. Injection site reactions were common, occurring in almost 100% of patients treated with either GLSI-100 or GM-CSF alone. Previous publications have reported the increase in DTH response reported among patients after treatment with GLSI-100. However, it was of interest to understand the positive DTH responses to GP2 noted at baseline. 22.8% of patients reacted to GP2 at baseline with induration of 5mm or greater. In the subgroup of patients who later experienced a breast cancer recurrence, 36.4% (8/22) had such a baseline response. Analysis of the time to recurrence among those recurring found that the median time to recurrence was 0.6 years for those with a baseline response while those that did not have a positive baseline DTH response to GP2 took 1.2 years to recur.. Conclusions: This study demonstrated that GLSI-100 safely elicited a potent immune response as evidenced by increased DTH skin responses with treatment paired with improved disease-free survival. It is theorized that a positive baseline DTH skin test to GP2 may be evidence of an existing immune response to GP2 associated with residual disease, impending recurrence, or prior treatments. Further studies assessing if GP2 immune response is an important prognosticator of cancer disease state or recurrence are planned. Citation Format: Snehal S Patel, David B McWilliams, Mira S Patel, Christine T Fischette, Jaye Thompson, F. Joseph Daugherty. Analysis of GP2 immune response and relationship to recurrence in a prospective, randomized, placebo-controlled, single-blinded, multicenter, phase IIb study evaluating the reduction of recurrences using HER2/neu peptide GP2 (GLSI-100) vs. GM-CSF alone after adjuvant trastuzumab in HER2 positive women with operable breast cancer [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P2-13-29.
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- 2022
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13. Sarsasapogenin and fluticasone combination improves DNFB induced atopic dermatitis lesions in BALB/c mice
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Deepa S. Mandlik, Satish K Mandlik, and Snehal S. Patel
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Male ,2019-20 coronavirus outbreak ,medicine.medical_specialty ,Immunology ,Toxicology ,Dermatitis, Atopic ,BALB/c ,Proinflammatory cytokine ,Mice ,chemistry.chemical_compound ,Spirostans ,Toxicity Tests, Acute ,medicine ,Animals ,Immunology and Allergy ,Fluticasone ,Pharmacology ,Mice, Inbred BALB C ,biology ,business.industry ,Inflammatory skin disease ,General Medicine ,Atopic dermatitis ,Sarsasapogenin ,medicine.disease ,biology.organism_classification ,body regions ,chemistry ,Dinitrofluorobenzene ,Drug Therapy, Combination ,Female ,Histopathology ,Dermatologic Agents ,Inflammation Mediators ,business ,Drugs, Chinese Herbal ,medicine.drug - Abstract
Atopic dermatitis (AD) is a pruritic, chronic, relapsing inflammatory skin disease. The research aims to study the effects of Sarsasapogenin and its combination with Fluticasone in 2, 4-Dinitrofluorobenzene (DNFB) induced atopic dermatitis in BALB/c mice.Thirty male Balb/c mice were divided into 5 groups: (i) Normal control (NC), (ii) Disease control (DNFB), (iii) Sarsasapogenin (SG) (50 µg/mice), (iv) Fluticasone (FC) (50 µg/mice), (v) Sarsasapogenin + Fluticasone (SG + FC) combination (25 µg/mice). Dermatitis was induced by repeated application of DNFB in Balb/c mice. On topical application of SG, FC, and SG + FC combination on the ear and skin lesions, body weight, ear weight, ear thickness, erythema score, spleen weight, cytokines, immunoglobulin E (IgE) levels, nitric oxide (NO) level, hematological parameters, and oxidative stress markers were evaluated. Histological analysis of the ear tissue was also done.The results stated that SG and SG + FC treatment to mice considerably decrease the ear weight, ear thickness, spleen weight, serum IgE, cytokines, NO levels, and restoration of antioxidant stress markers with elevation in the hematological parameters. The observations were further confirmed by histopathological analysis of ear tissue.These data specify that SG has been demonstrated as a probable therapy for the treatment of allergic skin diseases in combination with FC by decreasing its dose from 50 to 25 µg/mice to avoid the chronic side effects of FC. Hence, it can be concluded that SG and SG + FC combination significantly improved the AD-like symptoms in the DNFB sensitized mice through mitigating the production of proinflammatory mediators and restoration of oxidative stress markers.
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- 2021
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14. Protective effect of sarsasapogenin in TNBS induced ulcerative colitis in rats associated with downregulation of pro-inflammatory mediators and oxidative stress
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Satish K Mandlik, Deepa S. Mandlik, and Snehal S. Patel
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Male ,Immunology ,Anti-Inflammatory Agents ,Down-Regulation ,Toxicology ,medicine.disease_cause ,Antioxidants ,Proinflammatory cytokine ,chemistry.chemical_compound ,Downregulation and upregulation ,Spirostans ,medicine ,Animals ,Immunology and Allergy ,Rats, Wistar ,Fluticasone ,Pharmacology ,business.industry ,General Medicine ,Sarsasapogenin ,medicine.disease ,Ulcerative colitis ,digestive system diseases ,Rats ,Oxidative Stress ,Trinitrobenzenesulfonic Acid ,chemistry ,Cytoprotection ,Colitis, Ulcerative ,Inflammation Mediators ,business ,Oxidative stress ,Drugs, Chinese Herbal ,medicine.drug - Abstract
Ulcerative colitis (UC) is a chronic inflammatory bowel condition considered by oxido-nitrosative stress and the release of pro-inflammatory cytokines that affects the mucosal lining of the colon. Sarsasapogenin (SG), as an active component, has been found in many plants, and it exhibits potential protective effects, such as anti-inflammatory, antioxidant, anti-psoriasis, anti-arthritis, anti-asthma, anti-depressant and anti-cancer. However, the effects of SG on UC remain unknown.The purpose of this study was to investigate the effects of SG on 2, 4, 6-trinitrobenzene sulfonic acid (TNBS)-induced UC in rats.Thirty Wistar rats were randomized into five groups: (i) Normal control, (ii) Disease control (TNBS), (iii) Sarsasapogenin (SG) (50 µg/rat), (iv) Fluticasone (FC) (50 µg/rat), (v) Sarsasapogenin + Fluticasone (SG + FC) (25 µg/rat). UC was induced in rats by trans-rectal instillation of TNBS (10 mg/kg). SG, FC and SG + FC were administered for 11 days and on the 8th day colitis was induced. Several molecular, biochemical and histological alterations were evaluated in the colon tissue. All treatment group results were compared to the TNBS group results.The study results revealed that treatment of rats with SG and SG + FC combination significantly decreased the colon weight/length ratio, macroscopic inflammation score, lesions score, diarrhea score and adhesion score. Combination treatment in rats significantly reduced the production of biochemical parameters, proinflammatory cytokines, haematological parameters, serum IgE levels and restored the oxidative stress markers. SG and SG + FC treatment also considerably restored the histopathological changes induced by TNBS.Thus, SG and SG + FC combination could alter the disease progression and could be a hopeful therapeutic target for the management of UC by reducing its dose in combination with FC to elude the long term adverse effects of FC.
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- 2021
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15. Efonidipine Exerts Cerebroprotective Effect by Down-regulation of TGF-β/SMAD-2-Dependent Signaling Pathway in Diabetic Rats
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Ghulam Md Ashraf, Vishal Chavda, George E. Barreto, Snehal S. Patel, and Rashmi Rajput
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0301 basic medicine ,medicine.medical_specialty ,medicine.drug_class ,Efonidipine ,Calcium channel blocker ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,chemistry.chemical_compound ,0302 clinical medicine ,Diabetes mellitus ,Internal medicine ,medicine ,Stroke ,Voltage-dependent calcium channel ,business.industry ,Calcium channel ,General Medicine ,Streptozotocin ,medicine.disease ,Malondialdehyde ,030104 developmental biology ,Endocrinology ,chemistry ,business ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Calcium overload and hyperglycemia are risks of stroke onset in diabetics. Our study was designed to elucidate the beneficial role of calcium channel blockers by targeting voltage-gated calcium channels in diabetes-associated cerebrovascular complications. Diabetes was induced using the neonatal streptozotocin rat model. After confirmation of diabetes, middle cerebral artery occlusion (MCAO) was carried out. The pre-treatment with 1 mg/kg/day efonidipine was administered for the period of 4 weeks. After 24 h of ischemic induction surgery, the neurological score was determined, and blood was collected for determination of biochemical parameters. Treatment with efonidipine showed a significant reduction in post-ischemic brain infract volume, brain hemisphere weight difference, neurological score, Na+-K+ ATPase activity, serum CK-MB, and LDH levels in normoglycemic and hyperglycemic MCAO-induced animals. While no significant changes in glucose and lipid levels were observed by treatment, efonidipine significantly decreased the levels of malondialdehyde, acetylcholine esterase, and nitrite levels and increased the levels of antioxidant markers in both normoglycemic and hyperglycemic MCAO animals. TGF-β and VEGF were found to be down-regulated after treatment with efonidipine in gene expression study. In conclusion, the study data supports the cerebroprotective role of efonidipine in diabetic animals possibly through TGF-β/SMAD-2 signaling pathway.
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- 2021
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16. Abstract CT064: Phase III study to evaluate the efficacy and safety of GLSI-100 (GP2 + GM-CSF) in breast cancer patients with residual disease or high-risk PCR after both neo-adjuvant and postoperative adjuvant anti-HER2 therapy, Flamingo-01
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Snehal S. Patel, Jaye L. Thompson, Mira S. Patel, F. Joseph Daugherty, and Mothaffar F. Rimawi
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Cancer Research ,Oncology - Abstract
Background: GP2 is a biologic nine amino acid peptide of the HER2/neu protein delivered in combination with Granulocyte-Macrophage Colony Stimulating Factor (GM-CSF) that stimulates an immune response targeting HER2/neu expressing cancers, the combination known as GLSI-100. In a prospective, randomized, single-blinded, placebo-controlled, multicenter Phase IIb study, no recurrences were observed in the HER2+ population after 5 years of follow-up, if the patient was treated with GLSI-100, survived, and was followed for more than 6 months (p = 0.0338). Immunotherapy elicited a potent response measured by skin tests and immunological assays. Of the 146 patients that have been treated with GLSI-100 over 4 clinical trials, GLSI-100 was well-tolerated and no serious adverse events observed were considered related to the immunotherapy. Method: This Phase III trial is a prospective, randomized, double-blinded, multi-center study. After 1 year of trastuzumab-based therapy, 6 intradermal injections of GLSI-100 or placebo will be administered over the first 6 months and 5 subsequent boosters will be administered over the next 2.5 years for a total of 11 injections over 3 years. The participant duration of the trial will be 3 years treatment plus 1 additional year follow-up for a total of 4 years following the first year of treatment with trastuzumab-based therapy. Patients will be stratified based on residual disease status at surgery, hormone receptor status and region. Study Size - Interim Analysis: Approximately 498 patients will be enrolled. To detect a hazard ratio of 0.3 in invasive breast cancer free survival (IBCFS), 28 events will be required. An interim analysis for superiority and futility will be conducted when at least 14 events have occurred. This sample size provides 80% power if the annual rate of events in placebo patients is 2.4% or greater. Up to 100 non-HLA-A*02 subjects will be enrolled in an open-label arm. Eligibility Criteria: The patient population is defined by these key eligibility criteria: 1) HER2/neu positive and HLA-A*02; 2) Residual disease or High risk pCR (Stage III at presentation) post neo-adjuvant therapy; 3) Exclude Stage IV; and 4) Completed at least 90% of planned trastuzumab-based therapy. Trial Objectives: 1) To determine if GP2 therapy increases IBCFS; 2) To assess the safety profile of GP2; and 3) To monitor immunologic responses to treatment and assess relationship to efficacy and safety. Study Status: The study has been initiated at a number of sites in the US. The study is also expected to be opened in Spain, Germany, and France. Funding: This trial is supported by Greenwich LifeSciences. Citation Format: Snehal S. Patel, Jaye L. Thompson, Mira S. Patel, F. Joseph Daugherty, Mothaffar F. Rimawi. Phase III study to evaluate the efficacy and safety of GLSI-100 (GP2 + GM-CSF) in breast cancer patients with residual disease or high-risk PCR after both neo-adjuvant and postoperative adjuvant anti-HER2 therapy, Flamingo-01 [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 2 (Clinical Trials and Late-Breaking Research); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(8_Suppl):Abstract nr CT064.
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- 2023
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17. Pre‐exposure of voglibose exerts cerebroprotective effects through attenuating activation of the polyol pathway and inflammation
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Shraddha V. Bhadada, Vishal Chavda, Pooja Shah, and Snehal S. Patel
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Male ,medicine.medical_specialty ,Polymers ,Inflammation ,Oxidative phosphorylation ,medicine.disease_cause ,03 medical and health sciences ,0302 clinical medicine ,Polyol pathway ,Internal medicine ,Voglibose ,Animals ,Medicine ,Stroke ,030304 developmental biology ,0303 health sciences ,Aldose reductase ,medicine.diagnostic_test ,business.industry ,General Neuroscience ,medicine.disease ,Rats ,Endocrinology ,Hyperglycemia ,medicine.symptom ,business ,Lipid profile ,Inositol ,030217 neurology & neurosurgery ,Oxidative stress ,medicine.drug - Abstract
Chronic hyperglycemia induces activation of the polyol-sorbitol pathway, which is a major contributor to microvascular complications like stroke. The current study was designed to elucidate the therapeutic role of α-glucose inhibitor in chronic hyperglycemia-induced impaired polyol pathway and associated micro-complications. Male albino-Wistar rats (200-250 g) were treated with voglibose 10 mg kg-1 day-1 /p.o. for 2 weeks before middle cerebral artery occlusion; 72 hr after surgery, neurological score was evaluated and blood was collected for the assessment of various serum biochemical parameters like CRP, CK-MB, LDH, lipid profile, and blood glucose levels. In the end, brain samples were excised for determination of brain infarct volume, brain hemisphere weight difference, Na+-K+ ATPase activity oxidative stress-related parameters, aldose reductase activity, and gene expression studies. Results from the present study indicate that pre-treatment with voglibose showed significant improvement in lipid parameters but did not impact glucose levels. Voglibose has shown a statistically significant (p
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- 2021
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18. Promising Anti-stroke Signature of Voglibose: Investigation through In- Silico Molecular Docking and Virtual Screening in In-Vivo Animal Studies
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Ghulam Md Ashraf, Pooja Shah, Shraddha V. Bhadada, Vishal Chavda, and Snehal S. Patel
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Drug Evaluation, Preclinical ,Pharmacology ,Nitric Oxide ,Neuroprotection ,Diabetes Mellitus, Experimental ,User-Computer Interface ,03 medical and health sciences ,0302 clinical medicine ,Risk Factors ,In vivo ,Drug Discovery ,Voglibose ,Genetics ,medicine ,Animals ,Humans ,Computer Simulation ,Molecular Biology ,Stroke ,Genetics (clinical) ,030304 developmental biology ,0303 health sciences ,business.industry ,Infarction, Middle Cerebral Artery ,Streptozotocin ,medicine.disease ,Lipids ,Rats ,Molecular Docking Simulation ,Cerebrovascular Disorders ,Disease Models, Animal ,Neuroprotective Agents ,Postprandial ,Diabetes Mellitus, Type 2 ,Docking (molecular) ,Hyperglycemia ,Molecular Medicine ,Animal studies ,Sodium-Potassium-Exchanging ATPase ,business ,Inositol ,Software ,030217 neurology & neurosurgery ,medicine.drug - Abstract
Background: Postprandial hyperglycemia considered to be a major risk factor for cerebrovascular complications. Objective: The current study was designed to elucidate the beneficial role of voglibose via in-silico in vitro to in-vivo studies in improving the postprandial glycaemic state by protection against strokeprone type 2 diabetes. Material and Methods: In-Silico molecular docking and virtual screening were carried out with the help of iGEMDOCK+ Pymol+docking software and Protein Drug Bank database (PDB). Based on the results of docking studies, in-vivo investigation was carried out for possible neuroprotective action. T2DM was induced by a single injection of streptozotocin (90mg/kg, i.v.) to neonates. Six weeks after induction, voglibose was administered at the dose of 10mg/kg p.o. for two weeks. After eight weeks, diabetic rats were subjected to middle cerebral artery occlusion, and after 72 hours of surgery, neurological deficits were determined. The blood was collected for the determination of serum glucose, CK-MB, LDH and lipid levels. Brains were excised for determination of brain infarct volume, brain hemisphere weight difference, Na+-K+ ATPase activity, ROS parameters, NO levels, and aldose reductase activity. Results: In-silico docking studies showed good docking binding score for stroke associated proteins, which possibly hypotheses neuroprotective action of voglibose in stroke. In the present in-vivo study, pre-treatment with voglibose showed a significant decrease (p Conclusion: In-silico molecular docking and virtual screening studies and in-vivo studies in MCAo induced stroke, animal model outcomes support the strong anti-stroke signature for possible neuroprotective therapeutics.
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- 2020
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19. Therapeutics and Research Related to Glioblastoma: Advancements and Future Targets
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Vishal Chavda, Dhananjay Yadav, Snehal S. Patel, Vimal Patel, Jun-O Jin, and Jigar Shah
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medicine.medical_treatment ,Clinical Biochemistry ,Brain tumor ,Tumor initiation ,Bioinformatics ,03 medical and health sciences ,0302 clinical medicine ,Animals ,Humans ,Medicine ,030304 developmental biology ,Pharmacology ,0303 health sciences ,Brain Neoplasms ,business.industry ,Cancer ,Treatment options ,Glioma ,Immunotherapy ,medicine.disease ,Key features ,Radiation therapy ,030220 oncology & carcinogenesis ,Glioblastoma ,business ,Signal Transduction - Abstract
Glioblastoma, the most common primary brain tumor, has been recognized as one of the most lethal and fatal human tumors. It has a dismal prognosis, and survival after diagnosis is less than 15 months. Surgery and radiotherapy are the only available treatment options at present. However, numerous approaches have been made to upgrade in vivo and in vitro models with the primary goal of assessing abnormal molecular pathways that would be suitable targets for novel therapeutic approaches. Novel drugs, delivery systems, and immunotherapy strategies to establish new multimodal therapies that target the molecular pathways involved in tumor initiation and progression in glioblastoma are being studied. The goal of this review was to describe the pathophysiology, neurodegeneration mechanisms, signaling pathways, and future therapeutic targets associated with glioblastomas. The key features have been detailed to provide an up-to-date summary of the advancement required in current diagnosis and therapeutics for glioblastoma. The role of nanoparticulate system graphene quantum dots as suitable therapy for glioblastoma has also been discussed.
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- 2020
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20. Combination of Sarsasapogenin and Fluticasone attenuates ovalbumin-induced airway inflammation in a mouse asthma model
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Deepa K. Ingawale, Satish K Mandlik, and Snehal S. Patel
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Male ,0301 basic medicine ,Ovalbumin ,Immunology ,Disease ,Toxicology ,Proinflammatory cytokine ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Pharmacotherapy ,Spirostans ,Animals ,Immunology and Allergy ,Medicine ,Anti-Asthmatic Agents ,Lung ,Fluticasone ,Asthma ,Pharmacology ,Mice, Inbred BALB C ,Dose-Response Relationship, Drug ,biology ,business.industry ,General Medicine ,Sarsasapogenin ,Immunoglobulin E ,medicine.disease ,respiratory tract diseases ,Disease Models, Animal ,Oxidative Stress ,030104 developmental biology ,chemistry ,030220 oncology & carcinogenesis ,biology.protein ,Cytokines ,Drug Therapy, Combination ,Female ,business ,Airway ,Drugs, Chinese Herbal ,medicine.drug - Abstract
Objective: Asthma is a very common airway inflammatory disease for which the existing drug therapy options are insufficient. In this study, we explored the mechanisms underlying the anti-in...
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- 2020
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21. Review for 'Pioglitazone attenuates ischaemic stroke aggravation by blocking PPARγ reduction and inhibiting chronic inflammation in diabetic mice'
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null Snehal S Patel
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- 2021
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22. Abstract CT183: Final five year median follow-up data from a prospective, randomized, placebo-controlled, single-blinded, multicenter, phase IIb study evaluating a time series of immune responses using HER2/neu peptide GP2 + GM-CSF vs. GM-CSF alone after adjuvant trastuzumab in HER2 positive women with operable breast cancer
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Snehal S. Patel, David B. McWilliams, Mira S. Patel, Christine T. Fischette, Jaye Thompson, and F Joseph Daugherty
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- 2021
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23. The prevalence of prediabetes and associated conditions in Ahmedabad population
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Bhoomi Arora, Banshi Saboo, and Snehal S. Patel
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education.field_of_study ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Endocrinology, Diabetes and Metabolism ,Population ,030209 endocrinology & metabolism ,Overweight ,medicine.disease ,vitamin D deficiency ,03 medical and health sciences ,0302 clinical medicine ,Diabetes mellitus ,Internal medicine ,Internal Medicine ,medicine ,Hyperinsulinemia ,030212 general & internal medicine ,Prediabetes ,medicine.symptom ,education ,Lipid profile ,business ,Body mass index - Abstract
Prediabetes is the borderline of diabetes, the most common disease worldwide, and the prevalence appears to be increasing with weight. Thus, the present study was planned to study the prevalence of prediabetes and its association with body mass index, blood pressure and lipid abnormalities in apparently healthy school, college-going students and adult population. It was a population-based cross-sectional study, conducted on 2412 subjects of Ahmedabad of age 12 to 55 years. Body mass index, blood pressure and prediabetes were estimated using standard protocol. Lipid profile, vitamin D, insulin and C-reactive protein were estimated by a trained lab technician. Subjects with fasting blood sugar level ≥ 100 mg/dL and ≤ 125 mg/dL were identified as prediabetics. The data was analysed using SPSS 20 by Pearson’s chi-square test and one-way analysis of variance. Prediabetes prevalence was 5.09% in 12–17 years age group followed by 28.81% and 33.19% in 18–35 and 36–55 years age group, respectively. Prediabetes was found higher amongst overweight, obese, pre-hypertensive and hypertensive participants than healthy participants. The prevalence of prediabetes was found higher amongst participants who do not indulge in exercise. Junk food and sweet eating frequencies, stress level and socioeconomic status, lipid abnormalities, vitamin D deficiency, hyperinsulinemia and elevated C-reactive protein were found significantly associated with prediabetes. Prediabetes is a lifestyle disorder and its prevalence has increased at an alarming rate with age. Prediabetes and its associated risk factors were found to be common in the city of Ahmedabad which suggests the need for greater public awareness programmes on these morbidities.
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- 2019
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24. High-Performance Thin Layer Chromatography Method Development and Validation for Simultaneous Determination of Phenolic Acids in Selected Indian Bamboo Species
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Priti Mehta, Jayanta Kumar Maji, Shital Butani, Mansi Patel, and Snehal S. Patel
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Bamboo ,Chromatography ,Materials science ,High performance thin layer chromatography ,Method development - Published
- 2019
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25. Anti-inflammatory potential of hecogenin on atopic dermatitis and airway hyper-responsiveness by regulation of pro-inflammatory cytokines
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Satish K Mandlik, Deepa K. Ingawale, and Snehal S. Patel
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0301 basic medicine ,Sapogenins ,Erythema ,medicine.drug_class ,Immunology ,Anti-Inflammatory Agents ,Pharmacology ,Toxicology ,Anti-inflammatory ,Dermatitis, Atopic ,Proinflammatory cytokine ,Mice ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Animals ,Immunology and Allergy ,Sensitization ,Fluticasone ,Diminution ,Dose-Response Relationship, Drug ,biology ,Tumor Necrosis Factor-alpha ,business.industry ,General Medicine ,Atopic dermatitis ,medicine.disease ,Interleukin-12 ,Asthma ,Ovalbumin ,030104 developmental biology ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,biology.protein ,Drug Therapy, Combination ,Female ,medicine.symptom ,business ,medicine.drug - Abstract
Objective: Hecogenin is a sapogenin found in Agave sisalana species that is used extensively for the treatment of anti-inflammatory, antifungal, hypotensive, anti-nociceptive activity and cancer. We have studied the anti-inflammatory effect of Hecogenin and its combination with Fluticasone on atopic dermatitis and airway hyper-responsiveness in Balb/c mice. Material and methods: Dermatitis was induced by repeated application of 2, 4-dinitrofluorobenzene in Balb/c mice. After a topical application of Hecogenin, Fluticasone and their combination on the skin lesions, the ear thickness, ear weight and erythema score were evaluated. Asthma was induced by sensitization and challenge of ovalbumin in Balb/c mice. Results: The topical application of Hecogenin and its combination with Fluticasone in mice effectively suppressed the ear swelling and weight. As well as the levels of pro-inflammatory cytokines were decreased by Hecogenin and its combination in-vivo. Whereas, intra-nasal administration of Hecogenin and its combination in ovalbumin induced airway hyper-responsiveness reveals a significant decrement in total cell count, differential cell count and cytokines levels. Similar observations were obtained for myeloperoxidase level in ear and lung tissue. The results were supported by histological studies of ear and lung tissue. Conclusion: These data indicate that Hecogenin has been proved as a potential therapy for allergic skin diseases and bronchial asthma treatments in combination with Fluticasone by reducing its dose from 50 to 25 μg/mice in combination to circumvent the long term side effects of Fluticasone. The beneficial effect of Hecogenin may be related to the diminution of TNF-α and IL-12 cytokines production in Balb/c mice.
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- 2019
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26. Inhibitory effects of catechin isolated from Acacia catechu on ovalbumin induced allergic asthma model
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Vinit D. Patel and Snehal S. Patel
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0303 health sciences ,Nutrition and Dietetics ,biology ,medicine.medical_treatment ,Intraperitoneal injection ,Catechin ,Catechu ,Pharmacology ,01 natural sciences ,Histidine decarboxylase ,0104 chemical sciences ,010404 medicinal & biomolecular chemistry ,03 medical and health sciences ,chemistry.chemical_compound ,Ovalbumin ,chemistry ,Polyphenol ,biology.protein ,medicine ,Respiratory system ,Histamine ,030304 developmental biology ,Food Science - Abstract
Purpose Polyphenols possess anti-allergic activities. Catechin is one of the polyphenols that are abundantly present in the Acacia catechu. In this study, the authors investigated the effect of catechin isolated from A. catechu in an experimental mouse model of ovalbumin (OVA)-induced allergic asthma. Design/methodology/approach Catechin was isolated from A. catechu, and phytochemical analysis was carried out by ultraviolet visible and thin-layer chromatography (TLC), high pressure thin-layer chromatography was used for the determination of an amount of catechin present. In a first set of an experiment, the authors have carried out dose-dependent evaluation of catechin on histamine synthesis in normal rats. In another study, allergic asthma was induced in BALB/c mice by intraperitoneal injection of 50 mg OVA dissolved in 4 mg aluminum hydroxide dissolved in 0.2 ml saline on Days 0 and 14. Catechin was given orally at the dose of 100 mg/kg, once a day from Day 1 to Day 35 and after which various respiratory parameters such as tidal volume, respiratory rate and airflow rate, biochemical parameters such as histamine release from mast cells, bronchoalveolar (BAL) lavage fluid analysis and histopathology of lungs were carried out. Findings Catechin showed significant (p < 0.05) improvement in respiratory parameters such as tidal volume, respiratory rate and airflow rate, as well as biochemical and hematological parameters such as blood histamine, serum bicarbonate and nitric oxide levels as compared to the disease control group. The treatment also showed inhibitory effects on histamine synthesis in rat peritoneal as well as BAL mast cells. Also, a significant (p < 0.05) improvement in lung histopathology was observed with catechin. Originality/value From the present study, the authors can conclude that catechin exhibited potent anti-allergic activity by inhibition of histamine synthesis by inhibition of histidine decarboxylase enzyme. The study suggests that catechin has therapeutic potential for the treatment of allergic inflammatory disease in humans.
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- 2019
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27. Retraction Note to: Insights from diversified anti-angiogenic models: role of β-interferon inducer DEAE-Dextran
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Anita K. Bakrania, Bhavesh C. Variya, and Snehal S. Patel
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Pharmacology ,General Medicine - Published
- 2022
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28. Clarithromycin Solid Lipid Nanoparticles for Topical Ocular Therapy: Optimization, Evaluation and In Vivo Studies
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Mahesh Attimarad, Anroop B. Nair, Pottathil Shinu, Mohamed A. Morsy, Shery Jacob, Nagaraja Sreeharsha, Bandar E. Al-Dhubiab, Sumeet Gupta, Jigar Shah, Snehal S. Patel, and Katharigatta N. Venugopala
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Chromatography ,Chemistry ,Cmax ,Pharmaceutical Science ,Fractional factorial design ,lcsh:RS1-441 ,Factorial experiment ,Permeation ,clarithromycin ,Article ,Bioavailability ,body regions ,lcsh:Pharmacy and materia medica ,solid lipid nanoparticles ,Pharmacokinetics ,Drug delivery ,Solid lipid nanoparticle ,permeation ,optimization ,pharmacokinetics - Abstract
Solid lipid nanoparticles (SLNs) are being extensively exploited as topical ocular carrier systems to enhance the bioavailability of drugs. This study investigated the prospects of drug-loaded SLNs to increase the ocular permeation and improve the therapeutic potential of clarithromycin in topical ocular therapy. SLNs were formulated by high-speed stirring and the ultra-sonication method. Solubility studies were carried out to select stearic acid as lipid former, Tween 80 as surfactant, and Transcutol P as cosurfactant. Clarithromycin-loaded SLN were optimized by fractional factorial screening and 32 full factorial designs. Optimized SLNs (CL10) were evaluated for stability, morphology, permeation, irritation, and ocular pharmacokinetics in rabbits. Fractional factorial screening design signifies that the sonication time and amount of lipid affect the SLN formulation. A 32 full factorial design established that both factors had significant influences on particle size, percent entrapment efficiency, and percent drug loading of SLNs. The release profile of SLNs (CL9) showed ~80% drug release in 8 h and followed Weibull model kinetics. Optimized SLNs (CL10) showed significantly higher permeation (30.45 μg/cm2/h, p <, 0.0001) as compared to control (solution). CL10 showed spherical shape and good stability and was found non-irritant for ocular administration. Pharmacokinetics data demonstrated significant improvement of clarithromycin bioavailability (p <, 0.0001) from CL10, as evidenced by a 150% increase in Cmax (~1066 ng/mL) and a 2.8-fold improvement in AUC (5736 ng h/mL) (p <, 0.0001) as compared to control solution (Cmax, 655 ng/mL and AUC, 2067 ng h/mL). In summary, the data observed here demonstrate the potential of developed SLNs to improve the ocular permeation and enhance the therapeutic potential of clarithromycin, and hence could be a viable drug delivery approach to treat endophthalmitis.
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- 2021
29. PCOS and Depression: Common Links and Potential Targets
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Snehal S. Patel, Abu Sufiyan Chhipa, Jagruti V Kolhe, Shital Butani, and Vishal Chavda
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Infertility ,medicine.medical_specialty ,Hirsutism ,endocrine system diseases ,Population ,Insulin resistance ,Internal medicine ,Acne Vulgaris ,medicine ,Vitamin D and neurology ,Humans ,Obesity ,education ,Acne ,hirsutism ,Depression (differential diagnoses) ,education.field_of_study ,business.industry ,Depression ,nutritional and metabolic diseases ,Obstetrics and Gynecology ,Alopecia ,medicine.disease ,Polycystic ovary ,female genital diseases and pregnancy complications ,Endocrinology ,Quality of Life ,Androgens ,Female ,Insulin Resistance ,business ,Polycystic Ovary Syndrome - Abstract
PCOS or polycystic ovary syndrome is a common endocrine disorder that occurs during the reproductive age in females. It manifests in the form of a wide range of symptoms including (but not limited to) hirsutism, amenorrhea, oligomenorrhea, obesity, acne vulgaris, infertility, alopecia, and insulin resistance. The incidence of depression in PCOS population is increasing as compared to the general population. Increased depression in PCOS significantly alters the quality of life (QOL) of affected females. Also, self-esteem is found to be low in both depression and PCOS. The loss in self-esteem in such patients can be largely attributed to the associated factors including (but not limited to) obesity, acne, androgenic alopecia, and hirsutism. The reason behind the occurrence of depression in PCOS remains elusive to date. Literature suggests that there is an overlap of clinical symptoms between depression and PCOS. As the symptoms overlap, there is a possibility of common associations between depression, PCOS, and PCOS-associated abnormalities including insulin resistance (IR), obesity, CVD, and androgen excess. Studies demonstrate that depression is an inflammatory disorder marked with increased levels of inflammatory markers. On the other hand, PCOS is also regarded as a pro-inflammatory state that is characterized by increased levels of pro-inflammatory markers. Thus, there is a possibility of an inflammatory relationship existing between depression and PCOS. It is also possible that the inflammatory markers in PCOS can cross the blood-brain barrier (BBB) leading to the development of depression. Through the present review, we have attempted to shed light on common associations/shared links between depression and PCOS with respect to the levels of cortisol, androgen, vitamin D, neurotransmitters, monoaminoxidase (MAO), and insulin-like growth factor-1 (IGF-1). Tracking down common associations between depression and PCOS will help find potential drug therapies and improve the QOL of females with depression in PCOS.
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- 2021
30. Efonidipine Exerts Cerebroprotective Effect by Down-regulation of TGF-β/SMAD-2-Dependent Signaling Pathway in Diabetic Rats
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Rashmi, Rajput, Vishal, Chavda, Snehal S, Patel, George E, Barreto, and Ghulam Md, Ashraf
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Male ,Vascular Endothelial Growth Factor A ,Dihydropyridines ,Brain ,Infarction, Middle Cerebral Artery ,Smad2 Protein ,Calcium Channel Blockers ,Diabetes Mellitus, Experimental ,Rats ,Nitrophenols ,Rats, Sprague-Dawley ,Oxidative Stress ,Neuroprotective Agents ,Organophosphorus Compounds ,Transforming Growth Factor beta ,Malondialdehyde ,Acetylcholinesterase ,Animals ,Nitrites ,Signal Transduction - Abstract
Calcium overload and hyperglycemia are risks of stroke onset in diabetics. Our study was designed to elucidate the beneficial role of calcium channel blockers by targeting voltage-gated calcium channels in diabetes-associated cerebrovascular complications. Diabetes was induced using the neonatal streptozotocin rat model. After confirmation of diabetes, middle cerebral artery occlusion (MCAO) was carried out. The pre-treatment with 1 mg/kg/day efonidipine was administered for the period of 4 weeks. After 24 h of ischemic induction surgery, the neurological score was determined, and blood was collected for determination of biochemical parameters. Treatment with efonidipine showed a significant reduction in post-ischemic brain infract volume, brain hemisphere weight difference, neurological score, Na
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- 2021
31. Hecogenin and fluticasone combination attenuates TNBS-induced ulcerative colitis in rats via downregulation of pro-inflammatory mediators and oxidative stress
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Snehal S. Patel, Deepa K. Ingawale, and Satish K Mandlik
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0301 basic medicine ,Male ,medicine.medical_specialty ,Sapogenins ,Immunology ,Anti-Inflammatory Agents ,Down-Regulation ,macromolecular substances ,Toxicology ,medicine.disease_cause ,Inflammatory bowel disease ,Antioxidants ,Proinflammatory cytokine ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Downregulation and upregulation ,medicine ,Immunology and Allergy ,Animals ,Large intestine ,Rats, Wistar ,Fluticasone ,Pharmacology ,business.industry ,General Medicine ,medicine.disease ,Ulcerative colitis ,digestive system diseases ,Rats ,Oxidative Stress ,030104 developmental biology ,medicine.anatomical_structure ,Trinitrobenzenesulfonic Acid ,030220 oncology & carcinogenesis ,Histopathology ,Colitis, Ulcerative ,Drug Therapy, Combination ,Female ,Inflammation Mediators ,business ,Oxidative stress ,medicine.drug - Abstract
Ulcerative colitis is common types of severe, progressive, idiopathic inflammatory bowel disease that involves the mucosal lining of the large intestine. The purpose of the study is to explore the effects of hecogenin in TNBS (2, 4, 6- trinitrobenzene sulfonic acid) induced ulcerative colitis model in rats.Thirty Wistar rats were randomized into five groups: (i) Normal Control (NC), (ii) Disease Control (DC), (iii) Hecogenin (HG) (50 µg/rat), (iv) Fluticasone (FC) (50 µg/rat), (v) Hecogenin + Fluticasone (HG + FC) combination (25 µg/rat). Colitis was induced by trans-rectal administration of TNBS using a catheter inserted 8 cm into the rectal portion of the rat. Colitis was evaluated by an independent observer who was blinded to the treatment. All treatment group results were compared to the TNBS group results.The study results revealed that treatment of rats with HG and HG + FC significantly improved the body weight and colon length whereas; decreased the spleen weight, colon weight/length ratio, macroscopic lesions score, diarrhea score and adhesion score. The drug treatment in rats substantially decreased the development of inflammatory cytokines, levels of serum immunoglobulin E, colonic nitric oxide contents and restoration of antioxidant stress markers. Histopathological colon sample study significantly reduced colonic inflammation with a substantial decrease in inflammation score.Thus, HG and HG + FC combination could change the pathogenesis of the disease and may be a potential therapeutic target for the treatment of ulcerative colitis by a reduction in dose in conjunction with FC to prevent the persistent adverse effects associated with FC.
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- 2021
32. Abstract CT232: A randomized, multicenter, placebo-controlled, phase III study to evaluate the efficacy and safety of HER2/neu peptide GLSI-100 (GP2 + GM-CSF) in patients with residual disease or high-risk PCR after both neo-adjuvant and postoperative adjuvant anti-HER2 therapy, Flamingo-01
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Snehal S. Patel, Jaye Thompson, Mira S. Patel, F. Joseph Daugherty, C. Kent Osborne, and Mothaffar F. Rimawi
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Cancer Research ,Oncology - Abstract
Background: GP2 is a biologic nine amino acid peptide of the HER2/neu protein delivered in combination with Granulocyte-Macrophage Colony Stimulating Factor (GM-CSF) that stimulates an immune response targeting HER2/neu expressing cancers. In a prospective, randomized, single-blinded, placebo-controlled, multicenter Phase IIb study, no recurrences were observed in the HER2+ population after 5 years of follow-up, if the patient received the 6 primary intradermal GLSI-100 injections (p = 0.0338). Immunotherapy elicited a potent response measured by skin tests and immunological assays. Of the 146 patients that have been treated with GLSI-100 over 4 clinical trials, GLSI-100 was well-tolerated and no serious adverse events were observed considered related to the immunotherapy. Trial Design: This Phase 3 trial is a prospective, randomized, double-blinded, multi-center study. After 1 year of trastuzumab-based therapy, 6 intradermal injections of GLSI-100 or placebo will be administered over the first 6 months and 5 subsequent boosters will be administered over the next 2.5 years for a total of 11 injections over 3 years. The participant duration of the trial will be 3 years treatment plus 1 additional year follow-up for a total of 4 years following the first year of treatment with trastuzumab-based therapy. Patients will be stratified based on residual disease status at surgery, hormone receptor status, prior pertuzumab therapy and region. Approximately 498 patients will be enrolled. To detect a hazard ratio of 0.3 in invasive breast cancer free survival (IBCFS), 28 events will be required. An interim analysis for superiority and futility will be conducted when at least 14 events have occurred. This sample size provides 80% power if the annual rate of events in placebo patients is 2.4% or greater. Up to 100 non-HLA-A*02 subjects will be enrolled in an open-label arm. Eligibility Criteria: The patient population is defined by these key eligibility criteria: 1. HER2/neu positive and HLA-A*02 2. Residual disease or High risk pCR (Stage III at presentation) post neo-adjuvant therapy 3. Exclude Stage IV 4. Completed at least 90% of planned trastuzumab-based therapy Trial Objectives: 1. To determine if GP2 therapy increases IBCFS 2. To assess the safety profile of GP2 3. To monitor immunologic responses to treatment and assess relationship to efficacy and safety Accrual: Site selection and study start-up is in progress at multiple sites. Target enrollment is 598 subjects. Contact information: Snehal Patel Greenwich LifeSciences, Inc. Stafford, TX Email: snehal.patel@greenwichlifesciences.com Website: greenwichlifesciences.com Funding: This trial is supported by Greenwich LifeSciences. Citation Format: Snehal S. Patel, Jaye Thompson, Mira S. Patel, F. Joseph Daugherty, C. Kent Osborne, Mothaffar F. Rimawi. A randomized, multicenter, placebo-controlled, phase III study to evaluate the efficacy and safety of HER2/neu peptide GLSI-100 (GP2 + GM-CSF) in patients with residual disease or high-risk PCR after both neo-adjuvant and postoperative adjuvant anti-HER2 therapy, Flamingo-01 [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr CT232.
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- 2022
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33. Abstract CT161: GP2 immune response a predictor of recurrence in a phase IIb study evaluating HER2/neu peptide GP2 (GLSI-100) vs. GM-CSF alone after adjuvant trastuzumab in HER2 positive women with breast cancer
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Snehal S. Patel, David B. McWilliams, Mira S. Patel, Jaye Thompson, and F. Joseph Daugherty
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Cancer Research ,Oncology - Abstract
The authors did not submit an updated abstract. The original abstract should be considered final. Citation Format: Snehal S. Patel, David B. McWilliams, Mira S. Patel, Jaye Thompson, F. Joseph Daugherty. GP2 immune response a predictor of recurrence in a phase IIb study evaluating HER2/neu peptide GP2 (GLSI-100) vs. GM-CSF alone after adjuvant trastuzumab in HER2 positive women with breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr CT161.
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- 2022
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34. Abstract CT166: Injection site reactions correlate to delayed type hypersensitivity tests and suggest that GP2 reverses immune suppression of trastuzumab-treated HER2 positive patients in a phase IIb study evaluating HER2/neu peptide GP2 (GLSI-100) vs. GM-CSF after adjuvant trastuzumab in HER2 positive women with breast cancer
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Snehal S. Patel, David B. McWilliams, Mira S. Patel, Jaye Thompson, and F. Joseph Daugherty
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Cancer Research ,Oncology - Abstract
The authors did not submit an updated abstract. The original abstract should be considered final. Citation Format: Snehal S. Patel, David B. McWilliams, Mira S. Patel, Jaye Thompson, F. Joseph Daugherty. Injection site reactions correlate to delayed type hypersensitivity tests and suggest that GP2 reverses immune suppression of trastuzumab-treated HER2 positive patients in a phase IIb study evaluating HER2/neu peptide GP2 (GLSI-100) vs. GM-CSF after adjuvant trastuzumab in HER2 positive women with breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr CT166.
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- 2022
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35. Correction to: Efonidipine Exerts Cerebroprotective Effect by Down‑regulation of TGF‑β/SMAD‑2‑Dependent Signaling Pathway in Diabetic Rats
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George E. Barreto, Rashmi Rajput, Vishal Chavda, Snehal S. Patel, and Ghulam Md Ashraf
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Cellular and Molecular Neuroscience ,Downregulation and upregulation ,Chemistry ,medicine ,Tgf β smad ,Efonidipine ,Neurochemistry ,General Medicine ,Signal transduction ,Pharmacology ,Proteomics ,medicine.drug - Published
- 2021
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36. Author response for 'Pre‐exposure of voglibose exerts cerebroprotective effects through attenuating activation of the polyol pathway and inflammation'
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Shraddha V. Bhadada, Vishal Chavda, Pooja Shah, and Snehal S. Patel
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Polyol pathway ,Chemistry ,Voglibose ,medicine ,Inflammation ,medicine.symptom ,Pharmacology ,medicine.drug - Published
- 2020
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37. The Beneficial Effect of Boswellic Acid on Bone Metabolism and Possible Mechanisms of Action in Experimental Osteoporosis
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Snehal S. Patel, Pran Kishore Deb, Anroop B. Nair, Harika Duvva, Bandar E. Al-Dhubiab, Jigar Shah, and Mohamed A. Morsy
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0301 basic medicine ,musculoskeletal diseases ,medicine.medical_specialty ,medicine.drug_class ,Osteoporosis ,Anti-Inflammatory Agents ,lcsh:TX341-641 ,acetyl-11-keto-β-boswellic acid ,Bone and Bones ,Article ,NF-κB ,Bone remodeling ,Rats, Sprague-Dawley ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Bone Density ,Osteoclast ,Internal medicine ,medicine ,Animals ,Humans ,Boswellia ,Bone mineral ,Nutrition and Dietetics ,Bone Density Conservation Agents ,biology ,Tumor Necrosis Factor-alpha ,NF-kappa B ,biology.organism_classification ,medicine.disease ,osteoporosis ,Triterpenes ,030104 developmental biology ,medicine.anatomical_structure ,Endocrinology ,ovariectomy ,chemistry ,Estrogen ,030220 oncology & carcinogenesis ,TNF-α ,Boswellia serrata ,Female ,Boswellic acid ,lcsh:Nutrition. Foods and food supply ,Phytotherapy ,Signal Transduction ,Food Science ,Hormone - Abstract
Estrogen is instrumental in the pathological process of osteoporosis because a deficiency of this hormone increases the release of bone-resorbing cytokines. Acetyl-11-keto-&beta, boswellic acid (AKBA), a constituent from Boswellia serrata, has an anti-inflammatory effect by inhibiting tumor necrosis factor-&alpha, (TNF-&alpha, ) expression, which leads to a decline in receptor activator of nuclear factor-kappa B (NF-&kappa, B) ligand, and consequently, a reduction in osteoclast activity. Hence, AKBA may be beneficial against bone loss during osteoporosis. Therefore, the current study intended to evaluate the beneficial effects of AKBA in ovariectomy-induced osteoporosis and to investigate its mechanism of action. Sham-operation or ovariectomy female Sprague Dawley rats were used for evaluating the antiosteoporotic effect of AKBA in this study. AKBA (35 mg/kg, p.o.) and estradiol (0.05 mg/kg, i.m.) were administered for 42 days. At the end of the experiment, body and uterus weights, serum and urine calcium and phosphorus, serum alkaline phosphatase, and urinary creatinine levels, besides serum levels of NF-&kappa, B and TNF-&alpha, were determined. Weight, length, thickness, hardness, calcium content, as well as the bone mineral density of femur bone and lumbar vertebra were measured. A histopathological examination was also carried out. AKBA ameliorated all tested parameters and restored a normal histological structure. Thus, AKBA showed good antiosteoporotic activity, which may be mediated through its suppression of the NF-&kappa, B-induced TNF-&alpha, signaling pathway.
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- 2020
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38. SARS-CoV-2 and Recent Therapeutics: A Current Scenario
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Snehal S. Patel, Vishal Chavda, and Kajal Madhvani
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Vaccination ,Clinical trial ,medicine.medical_specialty ,Transmission (medicine) ,business.industry ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Pandemic ,medicine ,Day to day ,Intensive care medicine ,business ,Viral infection - Abstract
SARS-CoV-2 is the pandemic affecting the life worldwide and increasing the day to day morbidity and mortality. The virus has started its presence from December 2019 and till date many people are affected in larger numbers as there is no specific pathology or pathogenesis available. Moreover, few drugs have shown their potential as effective therapy in early stages of this viral infection. Many drugs are under clinical trials and many countries are in a race to develop vaccination for this rapidly growing infection. In this review, we have tried to focus the revealed pathology, available new targets, and future scope of therapeutic candidates for this deadly infection. This review focuses on key aspects of origin, transmission, etiology, and progress on available tools for clinical diagnostics. We have also tried to enlighten the drug candidates for strong future therapeutic targets for this deadly infection. In short, this review briefly discusses the hopes and hypes of SARS-CoV-19 infection, its related current therapeutics, and recent advancements in SARS-CoV-19 treatment.
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- 2020
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39. Cerebrovascular Complications of Diabetes: SGLT-2 Inhibitors as a Promising Future Therapeutics
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Snehal S. Patel, Vishal Chavda, and Ruju Vashi
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Clinical Biochemistry ,Pharmacology ,medicine.disease_cause ,Kidney ,Diabetes Complications ,Sodium-Glucose Transporter 2 ,Diabetes mellitus ,Drug Discovery ,Medicine ,Humans ,Hypoglycemic Agents ,Endothelial dysfunction ,Stroke ,Sodium-Glucose Transporter 2 Inhibitors ,business.industry ,Sodium ,Glucose transporter ,Type 2 Diabetes Mellitus ,medicine.disease ,Renal glucose reabsorption ,Cerebrovascular Disorders ,Glucose ,Diabetes Mellitus, Type 2 ,Hyperglycemia ,Molecular Medicine ,business ,Reperfusion injury ,Oxidative stress - Abstract
Sodium-Glucose co-transporter inhibitors are a novel class of drugs widely used in the treatment of type 2 diabetes mellitus medical management. This class of drugs has a simple mechanism of action by which they decrease blood glucose levels. They prevent the uptake or re-absorption of glucose in the blood by inhibiting the SGLT2 co-transport channels located in the renal proximal convoluted tubule. Since SGLT2 is the low affinity, high capacity glucose transporter, it allows the co-transport of sodium and glucose through it. SGLT2s are accountable for around 90% of the renal glucose reuptake. Cerebrovascular complications or accidents (CVAs) are the world's leading cause of mortality, resulting in around 6 million deaths annually. Diabetics are prone to develop mitochondrial dysfunction and neurodegeneration due to hyperglycemia and oxidative stress end products. Due to hyperglycemic condition in diabetes, it is always an elevated risk of cerebrovascular dysfunction due to hyperglycemia as it includes endothelial dysfunction, atherosclerosis, hypercoagulability, oxidative stress, renal reperfusion injury which may lead to neuronal degeneration and cognitive impairment. A diabetic individual is more prone to develop risk factors for transient ischemic attacks than a non-diabetic patient. These inhibitors reduce hyperglycemia by blocking renal glucose reabsorption, therefore promoting an increase in renal glucose excretion. This review discusses the potential role of SGLT2 inhibitors in treating CVAs associated with T2DM.
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- 2020
40. DEAE-Dextran coated paclitaxel nanoparticles act as multifunctional nano system for intranuclear delivery to triple negative breast cancer through VEGF and NOTCH1 inhibition
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Anita K. Bakrania, Lalaji V. Rathod, Bhavesh C. Variya, and Snehal S. Patel
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Vascular Endothelial Growth Factor A ,0301 basic medicine ,Paclitaxel ,Combination therapy ,medicine.medical_treatment ,media_common.quotation_subject ,Pharmaceutical Science ,Triple Negative Breast Neoplasms ,Pharmacology ,Cell Line ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,Drug Delivery Systems ,0302 clinical medicine ,In vivo ,Cell Line, Tumor ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Animals ,Humans ,Receptor, Notch1 ,Internalization ,Triple-negative breast cancer ,media_common ,Mice, Inbred BALB C ,Chemotherapy ,Chemistry ,DEAE-Dextran ,Cancer ,General Medicine ,medicine.disease ,Antineoplastic Agents, Phytogenic ,HEK293 Cells ,030104 developmental biology ,030220 oncology & carcinogenesis ,Drug delivery ,MCF-7 Cells ,Nanoparticles ,Female ,Interferons ,Biotechnology - Abstract
Triple negative breast cancer revolution has identified a plethora of therapeutic targets making it apparent that a single target for its treatment could be rare hence creating an urge to develop robust technologies for combination drug therapy. Paclitaxel, hailed as the most significant advancement in chemotherapy faces several underpinnings due to its low solubility and permeability. Advancing research has demonstrated the role of interferons in cancer. DEAE-Dextran, an emerging molecule with evidence of interferon induction was utilized in the present study to develop a nanoformulation in conjugation with paclitaxel to target multiple therapeutic pathways, with diminution of paclitaxel adverse effects and develop a specific targeted nano system. Evidently, it was demonstrated that DEAE-Dextran coated nanoformulation portrays significant synergistic cytotoxicity in the various cell lines. Moreover, overcoming the activation of ROS by paclitaxel, the combination drug therapy more effectively inhibited ROS through β-interferon induction. The nanoformulation was further conjugated to FITC for internalization studies which subsequently indicated maximum cellular uptake at 60min post treatment demonstrated by green fluorescence from FITC lighting up the nuclear membrane. Precisely, the mechanistic approach of nuclear-targeted nanoformulation was evaluated by in vivo xenograft studies which showed a synergistic release of β-interferon at the target organ. Moreover, the combination nanoformulation inculcated multiple mechanistic approaches through VEGF and NOTCH1 inhibition along with dual β and γ-interferon overexpression. Overall, the combination therapy may be a promising multifunctional nanomaterial for intranuclear drug delivery in TNBC.
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- 2018
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41. Endothelin-1 induced global ischaemia in adult zebrafish: A model with novel entity of stroke research
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Badrah S. Alghamdi, Vishal Chavda, Ghulam Md Ashraf, and Snehal S. Patel
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Blood Glucose ,Blood Platelets ,Male ,medicine.medical_specialty ,Population ,Ischemia ,Brain Ischemia ,Diabetes Mellitus, Experimental ,Cellular and Molecular Neuroscience ,Cognition ,Internal medicine ,Diabetes mellitus ,Animals ,Medicine ,Effects of sleep deprivation on cognitive performance ,education ,Zebrafish ,Stroke ,Swimming ,Ischemic Stroke ,Neurons ,education.field_of_study ,Behavior, Animal ,Endothelin-1 ,biology ,business.industry ,Cerebrum ,medicine.disease ,biology.organism_classification ,Disease Models, Animal ,Glucose ,medicine.anatomical_structure ,Cardiology ,Female ,business ,Neurocognitive ,Psychomotor Performance - Abstract
Background Stroke is a leading cause of death in the general population, and it occurs three times more frequently in diabetic patients, necessitating extensive research into new therapeutics. The reproducibility, similarity, and technical limitations of current animal models are limited. Methods We developed a stroke induction model using pink zebra-Danio-rerio. Diabetes was induced in zebrafish by giving them D -glucose (111 mM) for 14 days, and those with blood glucose levels higher than 100 mg/dl were included in the study. In Zebrafish, an experimental stroke was induced by a single oral administration of Endothelin-1 (ET-1, 3µl/gm). Swimming, behavioural patterns, and cognitive performance were all recorded and analysed using UMA Tracker. The brains were removed for histopathological analysis. Results In both the normal and diabetic groups, ET-1 administration resulted in a statistically significant change in swimming pattern and movements. Furthermore, changes in swimming pattern and recovery time were statistically significant in the diabetic ET-1 treatment group. In the neurocognitive assessment paradigm, the behavioural study of ET-1 treated groups revealed a disturbed cognitive profile and locomotor coordination, with an increase in the number of errors and a decrease in total distance travelled. Histopathological analysis of ET-1 treated groups revealed cortical lesions, shrunken neuronal cells, and thrombocytes in spheroid form with disturbed normal architecture of brain tissue when compared to normal control groups in tectum opticum and telencephalon. In terms of stability, reproducibility, and genetic similarity to human stroke, the current experimental model outperforms other available rodent stroke models. Conclusion: The ET-1 induced experimental zebrafish stroke model opens up new avenues for diabetes-related stroke research due to its novelty, reproducibility, and ability to overcome technical errors found in other recent models.
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- 2021
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42. Targeting pyruvate kinase muscle isoform 2 (PKM2) in cancer: What do we know so far?
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Snehal S. Patel and Abu Sufiyan Chhipa
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0301 basic medicine ,Gene isoform ,Thyroid Hormones ,Carcinogenesis ,Enzyme Activators ,Antineoplastic Agents ,PKM2 ,Biology ,030226 pharmacology & pharmacy ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,0302 clinical medicine ,Neoplasms ,Drug Discovery ,medicine ,Animals ,Humans ,Glycolysis ,Molecular Targeted Therapy ,Enzyme Inhibitors ,General Pharmacology, Toxicology and Pharmaceutics ,Membrane Proteins ,Cancer ,General Medicine ,medicine.disease ,Enzyme Activation ,Crosstalk (biology) ,030104 developmental biology ,Cancer cell ,Cancer research ,Carrier Proteins ,Intracellular ,Pyruvate kinase - Abstract
Cancer is a leading cause of death globally. Cancer cell transformation is the result of intricate crosstalk between intracellular components and proteins. A characteristic feature of cancer cells is the ability to reprogram their metabolic pathways to ensure their infinite proliferative potential. Pyruvate kinase muscle isoform 2 (PKM2) is a glycolytic enzyme that plays crucial roles in cancer, apart from carrying out its metabolic roles. PKM2 is involved in all the major events associated with cancer growth. Modulation of PKM2 activity (dimer inhibition or tetramer activation) has been successful in controlling cancer. However, recent studies provide contrary evidences regarding the oncogenic functions of PKM2. Moreover, several studies have highlighted the cancerous roles of PKM1 isoform in certain contexts. The present review aims at providing the current updates regarding PKM2 targeting in cancer. Further, the review discusses the contradictory results that suggest that both the isoforms of PKM can lead to cancer growth. In conclusion, the review emphasizes revisiting the approaches to target cancer metabolism through PKM to find novel and effective targets for anticancer therapy.
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- 2021
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43. P-BN006. Post exposure of anti-diabetic agents exerts neuroprotection and improve memory and learning in endothelin-1 induced global ischemia in adult zebrafish
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Snehal S. Patel and Vishal Chavda
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biology ,business.industry ,Ischemia ,Pharmacology ,biology.organism_classification ,medicine.disease ,Repaglinide ,Neuroprotection ,Sensory Systems ,Neurology ,Physiology (medical) ,Diabetes mellitus ,Voglibose ,medicine ,Neurology (clinical) ,Cognitive decline ,business ,Zebrafish ,Stroke ,medicine.drug - Abstract
Introduction. Stroke is the recurrent threat of mortality worldwide among normal population and 3 fold more in diabetics. Current study was designed to elucidate the neuroprotective role of anti-diabetic agents in endothelin-1 induced global ischemia in adult zebrafish. Method. In our study, pink zebra-Daniorerio was used for induction of stroke. Diabetes was induced with 111 mM D-glucose for 14 days and zebrafish having more than 100 mg/dl blood glucose level were included in study. The experimental stroke was induced with single oral administration of Endothelin-1 3 µl/gm of zebrafish. Post treatment with anti-diabetic agents was carried out for 7 days after stroke. The swimming, behavioural-patterns and cognitive performance (Y-maze, T-maze) was recorded and analysed with UMA Tracker. The brains were extracted for histopathological investigations. Results. Administration of ET-1 in normal and diabetic group showed statistically significant (p Conclusion. Upon the data of this investigation, we concluded that among all the anti-diabetic agents (voglibose, saxagliptin, repaglinide and dapaglifozin) voglibose and sexagliptin showed significant improvement in neurological fitness and improved learning and cognitive profile in post stroke adult zebrafish. Keywords: Adult zebrafish, cerebrovascular stroke, neuroprotection, cognitive decline.
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- 2021
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44. Abstract CT256: A prospective, randomized, multicenter, double-blinded, placebo-controlled phase III trial of the HER2/neu peptide GP2 + GM-CSF versus bacteriostatic saline/WFI placebo as adjuvant therapy after any trastuzumab-based therapy in HER2-positive women with operable breast cancer
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Snehal S. Patel, David B. McWilliams, Christine T. Fischette, Jaye Thompson, F Joseph Daugherty, C Kent Osborne, and Mothaffar F. Rimawi
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Cancer Research ,Oncology - Abstract
Background: GP2 is a biologic nine amino acid peptide of the HER2/neu protein delivered in combination with an FDA-approved immunoadjuvant Granulocyte-Macrophage Colony Stimulating Factor (GM-CSF, Sargramostim, Leukine) that stimulates an immune response targeting HER2/neu expressing cancers. In a prospective, randomized, single-blinded, placebo-controlled, multicenter Phase IIb clinical trial completed in 2018, no recurrences were observed in the HER2/neu positive adjuvant setting after median 5 years of follow-up, if the HLA 2+ patient received the 6 primary intradermal injections over the first 6 months (p = 0.0338) in a pre-specified subgroup analysis. Furthermore, the GP2 immunotherapy elicited a potent immune response measured by local skin tests and immunological assays. Of the 138 patients that have been treated with GP2 to date over 4 clinical trials, GP2 treatment was well tolerated and no serious adverse events were observed related to the GP2 immunotherapy. This Phase III trial aims to reproduce the Phase IIb study and will explore the use of GP2 + GM-CSF as adjuvant therapy to prevent the recurrence of breast cancer in HER2/neu positive and HLA 2+ patients, post-surgery and following the first year treatment with any trastuzumab-based therapy. Trial Design: This Phase III trial is a prospective, randomized, double-blinded, multi-center study. After 1 year of trastuzumab-based therapy or an approved biosimilar, treatment with GP2 + GM-CSF or placebo (Bacteriostatic Saline/WFI ) will be administered intradermally for the 6 primary immunization series over the first 6 months and 5 subsequent boosters over the next 2.5 years for a total of 11 injections over 3 years of treatment. The participant duration of the trial will be 3 years treatment plus 2 years follow-up for a total of 5 years following the first year treatment with trastuzumab-based therapy or approved biosimilar. An interim analysis is planned and patients will be stratified based on prior and current treatments, among other factors. Eligibility Criteria: The majority of breast cancer patients will be HER2/neu positive and HLA 2+, disease-free, conventionally treated node-positive, post breast tumor removal surgery and following the first year treatment with trastuzumab-based therapy. Trial Objectives:To determine if GP2 therapy reduces recurrence in HER2/neu positive breast cancer patients. To monitor the in vitro and in vivo immunologic responses to GP2 therapy and correlate these responses with the clinical outcomes.To monitor for any unexpected adverse events and toxicities related to GP2 therapy. Accrual: The target enrollment is up to approximately 500 patients. Contact information: snehal.patel@greenwichlifesciences.com Funding: This trial is supported by Greenwich LifeSciences. Citation Format: Snehal S. Patel, David B. McWilliams, Christine T. Fischette, Jaye Thompson, F Joseph Daugherty, C Kent Osborne, Mothaffar F. Rimawi. A prospective, randomized, multicenter, double-blinded, placebo-controlled phase III trial of the HER2/neu peptide GP2 + GM-CSF versus bacteriostatic saline/WFI placebo as adjuvant therapy after any trastuzumab-based therapy in HER2-positive women with operable breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2021; 2021 Apr 10-15 and May 17-21. Philadelphia (PA): AACR; Cancer Res 2021;81(13_Suppl):Abstract nr CT256.
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- 2021
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45. Liquid phase combinatorial synthesis of 1,2,5-trisubstituted benzimidazole derivatives as human DHODH inhibitors
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Manjunath Ghate, Snehal S. Patel, Nikum D. Sitwala, Vivek K. Vyas, Chirag C. Mehta, Dharmraj N. Rana, and Bhavesh C. Variya
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0301 basic medicine ,Oxidoreductases Acting on CH-CH Group Donors ,Benzimidazole ,Dihydroorotate Dehydrogenase ,Liquid phase ,01 natural sciences ,Biochemistry ,Inhibitory Concentration 50 ,03 medical and health sciences ,chemistry.chemical_compound ,Catalytic Domain ,Drug Discovery ,Humans ,Organic chemistry ,Enzyme Inhibitors ,Binding site ,Molecular Biology ,Binding Sites ,010405 organic chemistry ,Organic Chemistry ,Biological activity ,Carbon-13 NMR ,Combinatorial synthesis ,0104 chemical sciences ,Molecular Docking Simulation ,Kinetics ,030104 developmental biology ,chemistry ,Dihydroorotate dehydrogenase ,Proton NMR ,Benzimidazoles - Abstract
The synthesis of 1,2,5-trisubstituted benzimidazole derivatives was carried out using liquid phase combinatorial approach using soluble polymer assisted support (PEG5000). Synthesised compounds were characterised by FTIR, ESI-MS, 1 H NMR and 13 C NMR. The purity of compounds was confirmed with HPLC analysis. Compounds were also docked into the binding site of human dihydroorotate dehydrogenase (hDHODH). The synthesised compounds were screened for hDHODH enzyme inhibition assay using brequinar as standard compound. The synthesised compounds demonstrated comparative biological activity. Synthesised compounds 8d and 8e demonstrated IC 50 value of 81 ± 2 nM and 97 ± 2 nM, respectively.
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- 2017
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46. Formulation and evaluation of self-emulsifying drug delivery system for nimodipine, a BCS class II drug
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Aditi Bariya, Shital Butani, Manali D. Prajapat, Snehal S. Patel, and Nilesh J. Patel
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Drug ,Class (computer programming) ,business.industry ,media_common.quotation_subject ,Pharmaceutical Science ,Self emulsifying ,02 engineering and technology ,Pharmacology ,021001 nanoscience & nanotechnology ,030226 pharmacology & pharmacy ,03 medical and health sciences ,0302 clinical medicine ,Drug delivery ,Medicine ,0210 nano-technology ,business ,Nimodipine ,media_common ,medicine.drug - Published
- 2017
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47. DMBA- Induced Breast Cancer: A Hormonal Camouflage
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Snehal S. Patel, Anita K. Bakrania, and Bhavesh C. Variya
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Oncology ,Cancer Research ,medicine.medical_specialty ,business.industry ,DMBA ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,030220 oncology & carcinogenesis ,Internal medicine ,Camouflage ,medicine ,Molecular Medicine ,business ,030217 neurology & neurosurgery ,Hormone - Published
- 2017
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48. Overweight and Obesity in Ahmedabad School Going Children: Magnitude in Relationship to Hypertension and Associated Risk Factors
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Snehal S. Patel and Bhoomi Arora
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Pediatrics ,medicine.medical_specialty ,business.industry ,Environmental health ,medicine ,Overweight ,medicine.symptom ,medicine.disease ,business ,Obesity - Published
- 2017
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49. Antihyperglycemic Effects of Formulation of Spray Dried Fruit Juice of Emblica officinalis in Streptozotocin Induced Diabetic Rats
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Rajendra S Shah, Ramesh K. Goyal, and Snehal S. Patel
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0301 basic medicine ,Very low-density lipoprotein ,medicine.medical_specialty ,Type 1 diabetes ,Nutrition and Dietetics ,Triglyceride ,Chemistry ,Glucose uptake ,Insulin ,medicine.medical_treatment ,Public Health, Environmental and Occupational Health ,medicine.disease ,Streptozotocin ,03 medical and health sciences ,chemistry.chemical_compound ,030104 developmental biology ,0302 clinical medicine ,Insulin resistance ,Endocrinology ,030220 oncology & carcinogenesis ,Diabetes mellitus ,Internal medicine ,medicine ,Food Science ,medicine.drug - Abstract
Introduction: The present investigation was carried out to study antihyperglycemic activity of formulation prepared by spray-dried powder of fruit juice of E. officinalis (SDF) on animal model of type 1 diabetes. Methods: Hyperglycemia was produced by streptozotocin 45 mg/kg i.v. and formulation was administered orally (100 mg/kg) for 28 days to diabetic rats. At the end of 28 days various biochemical parameters such as serum glucose, insulin, AUCglucose, AUC insulin and lipid profile were estimated. Results: STZ induced rats showed signs and symptoms of diabetes such as body weight loss, polydipsia, polyuria, polyphagia, treatment with formulation produced slight improvement in these symptoms. Treatment with formulation to diabetic rat produced significant decrease in serum glucose, AUCglucose, triglyceride, cholesterol, LDL cholesterol, VLDL cholesterol. However, insulin, AUCinsulin and serum high density lipoprotein level were not significantly affected after treatment. Treatment also produced reduction in malonaldehyde levels and increased antioxidant enzymes levels in diabetic rats. Conclusion: Thus, formulation of E. officinalis significantly improved glucose and lipid dysfunction and oxidative stress in diabetic status. The mechanism of its antidiabetic activity may be either increase in peripheral glucose uptake, reduced insulin resistance or antioxidant property of formulation.
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- 2017
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50. Development of Asialoglycoprotein Receptor-Targeted Nanoparticles for Selective Delivery of Gemcitabine to Hepatocellular Carcinoma
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Shery Jacob, Pottathil Shinu, Snehal S. Patel, Mahesh Attimarad, Vimal Patel, Mohamed A. Morsy, Bandar E. Al-Dhubiab, Nagaraja Sreeharsha, Jigar Shah, Anroop B. Nair, Vishal Chavda, and Katharigatta N. Venugopala
- Subjects
Drug ,Male ,Antimetabolites, Antineoplastic ,Carcinoma, Hepatocellular ,media_common.quotation_subject ,Pharmaceutical Science ,02 engineering and technology ,Asialoglycoprotein Receptor ,clearance ,Pharmacology ,Deoxycytidine ,Article ,Analytical Chemistry ,03 medical and health sciences ,0302 clinical medicine ,Pharmacotherapy ,carrier ,In vivo ,Drug Discovery ,organ distribution ,Carcinoma ,medicine ,Animals ,Physical and Theoretical Chemistry ,media_common ,Tumor marker ,Chitosan ,business.industry ,Organic Chemistry ,Liver Neoplasms ,targeted delivery ,gemcitabine ,2-Acetylaminofluorene ,021001 nanoscience & nanotechnology ,medicine.disease ,Xenograft Model Antitumor Assays ,digestive system diseases ,Gemcitabine ,Rats ,carbohydrates (lipids) ,Chemistry (miscellaneous) ,030220 oncology & carcinogenesis ,Hepatocellular carcinoma ,Molecular Medicine ,Nanoparticles ,Asialoglycoprotein receptor ,0210 nano-technology ,business ,medicine.drug - Abstract
Selective targeting of anticancer drugs to the tumor site is beneficial in the pharmacotherapy of hepatocellular carcinoma (HCC). This study evaluated the prospective of galactosylated chitosan nanoparticles as a liver-specific carrier to improve the therapeutic efficacy of gemcitabine in HCC by targeting asialoglycoprotein receptors expressed on hepatocytes. Nanoparticles were formulated (G1&ndash, G5) by an ionic gelation method and evaluated for various physicochemical characteristics. Targeting efficacy of formulation G4 was evaluated in rats. Physicochemical characteristics exhibited by nanoparticles were optimal for administering and targeting gemcitabine effectively to the liver. The biphasic release behavior observed with G4 can provide higher drug concentration and extend the pharmacotherapy in the liver target site. Rapid plasma clearance of gemcitabine (70% in 30 min) from G4 was noticed in rats with HCC as compared to pure drug (p <, 0.05). Higher uptake of gemcitabine predominantly by HCC (64% of administered dose, p <, 0.0001) demonstrated excellent liver targeting by G4, while mitigating systemic toxicity. Morphological, biochemical, and histopathological examination as well as blood levels of the tumor marker, alpha-fetoprotein, in rats confirmed the curative effect of G4. In conclusion, this study demonstrated site-specific delivery and enhanced in vivo anti-HCC efficacy of gemcitabine by G4, which could function as promising carrier in hepatoma.
- Published
- 2019
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