8 results on '"Jawed A. Siddiqui"'
Search Results
2. Muc16 depletion diminishes KRAS-induced tumorigenesis and metastasis by altering tumor microenvironment factors in pancreatic ductal adenocarcinoma
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Imayavaramban Lakshmanan, Saravanakumar Marimuthu, Sanjib Chaudhary, Parthasarathy Seshacharyulu, Satyanarayana Rachagani, Sakthivel Muniyan, Ramakanth Chirravuri-Venkata, Pranita Atri, Sanchita Rauth, Rama Krishna Nimmakayala, Jawed Akhtar Siddiqui, Shailendra K. Gautam, Ashu Shah, Gopalakrishnan Natarajan, Seema Parte, Namita Bhyravbhatla, Kavita Mallya, Dhanya Haridas, Geoffrey A. Talmon, Lynette M. Smith, Sushil Kumar, Apar Kishor Ganti, Maneesh Jain, Moorthy P. Ponnusamy, and Surinder K. Batra
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Pancreatic Neoplasms ,Proto-Oncogene Proteins p21(ras) ,Mice ,Cancer Research ,Carcinogenesis ,Mucins ,Tumor Microenvironment ,Genetics ,Animals ,Molecular Biology ,Article ,Carcinoma, Pancreatic Ductal - Abstract
MUC16, membrane-bound mucin, plays an oncogenic role in pancreatic ductal adenocarcinoma (PDAC). However, the pathological role of MUC16 in the PDAC progression, tumor microenvironment, and metastasis in cooperation with Kras(G12D) and Trp53(R172H) mutations remains unknown. Deletion of Muc16 with activating mutations Kras(G12D/+) and Trp53(R172H/+) in mice significantly decreased progression and prolonged overall survival in Kras(G12D/+); Trp53(R172H/+); Pdx-1-Cre; Muc16(−/−) (KPCM) and Kras(G12D/+); Pdx-1-Cre; Muc16(−/−) (KCM), as compared to Kras(G12D/+); Trp53(R172H/+); Pdx-1-Cre (KPC) and Kras(G12D/+); Pdx-1-Cre (KC) mice, respectively. Muc16 knockout pancreatic tumor (KPCM) displays decreased tumor microenvironment factors and significantly reduced incidence of liver and lung metastasis compared to KPC. Furthermore, in silico data analysis showed a positive correlation of MUC16 with activated stroma and metastasis- associated genes. KPCM mouse syngeneic cells had significantly lower metastatic and endothelial cell binding abilities than KPC cells. Similarly, KPCM organoids significantly decreased the growth rate than KPC organoids. Interestingly, RNA-seq data revealed that the cytoskeletal proteins Actg2, Myh11, and Pdlim3 were downregulated in KPCM tumors. Further knockdown of these genes showed reduced metastatic potential. Overall, our results demonstrate that Muc16 alters the tumor microenvironment factors during pancreatic cancer progression and metastasis by changing the expression of Actg2, Myh11, and Pdlim3 genes.
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- 2022
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3. Liquid biopsies to occult brain metastasis
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Asad Ur Rehman, Parvez Khan, Shailendra Kumar Maurya, Jawed A. Siddiqui, Juan A. Santamaria-Barria, Surinder K. Batra, and Mohd Wasim Nasser
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Cancer Research ,Oncology ,Brain Neoplasms ,Biomarkers, Tumor ,Liquid Biopsy ,Tumor Microenvironment ,Humans ,Molecular Medicine ,Breast Neoplasms ,Female ,Neoplastic Cells, Circulating - Abstract
Brain metastasis (BrM) is a major problem associated with cancer-related mortality, and currently, no specific biomarkers are available in clinical settings for early detection. Liquid biopsy is widely accepted as a non-invasive method for diagnosing cancer and other diseases. We have reviewed the evidence that shows how the molecular alterations are involved in BrM, majorly from breast cancer (BC), lung cancer (LC), and melanoma, with an inception in how they can be employed for biomarker development. We discussed genetic and epigenetic changes that influence cancer cells to breach the blood-brain barrier (BBB) and help to establish metastatic lesions in the uniquely distinct brain microenvironment. Keeping abreast with the recent breakthroughs in the context of various biomolecules detections and identifications, the circulating tumor cells (CTC), cell-free nucleotides, non-coding RNAs, secretory proteins, and metabolites can be pursued in human body fluids such as blood, serum, cerebrospinal fluid (CSF), and urine to obtain potential candidates for biomarker development. The liquid biopsy-based biomarkers can overlay with current imaging techniques to amplify the signal viable for improving the early detection and treatments of occult BrM.
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- 2022
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4. FDPS cooperates with PTEN loss to promote prostate cancer progression through modulation of small GTPases/AKT axis
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Jawed A. Siddiqui, Sakthivel Muniyan, Sunandini Sharma, Geoffrey A. Talmon, Satyanarayana Rachagani, Subodh M. Lele, Lynette M. Smith, Brigham J. Killips, Kaustubh Datta, Eric Cruz, Moorthy P. Ponnusamy, Yuri Sheinin, Surinder K. Batra, Parthasarathy Seshacharyulu, and Ramakrishnan Krishnan
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Male ,0301 basic medicine ,MAPK/ERK pathway ,Cancer Research ,Adenocarcinoma ,Article ,Mice ,03 medical and health sciences ,Prostate cancer ,0302 clinical medicine ,Cell Line, Tumor ,Genetics ,medicine ,Animals ,Humans ,PTEN ,Molecular Biology ,Protein kinase B ,Zoledronic acid ,PI3K/AKT/mTOR pathway ,Monomeric GTP-Binding Proteins ,Mice, Knockout ,Prenylation ,biology ,Prostate Cancer ,PTEN Phosphohydrolase ,Prostatic Neoplasms ,Cancer ,Geranyltranstransferase ,medicine.disease ,3. Good health ,030104 developmental biology ,030220 oncology & carcinogenesis ,Knockout mouse ,Disease Progression ,Cancer research ,biology.protein ,FDPS ,Protein prenylation ,Proto-Oncogene Proteins c-akt ,Gene Deletion ,Signal Transduction - Abstract
Farnesyl diphosphate synthase (FDPS), a mevalonate pathway enzyme, is highly expressed in several cancers, including prostate cancer (PCa). To date, the mechanistic, functional, and clinical significance of FDPS in cancer remains unexplored. We evaluated the FDPS expression and its cancer-associated phenotypes using in vitro and in vivo methods in PTEN-deficient and sufficient human and mouse PCa cells and tumors. Interestingly, FDPS overexpression synergizes with PTEN deficiency in PTEN conditionally knockout mice (P
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- 2019
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5. RNA-based therapies: A cog in the wheel of lung cancer defense
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Mohd W. Nasser, Imayavaramban Lakshmanan, Apar Kishor Ganti, Ravi Salgia, Surinder K. Batra, Jawed A. Siddiqui, Maneesh Jain, and Parvez Khan
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0301 basic medicine ,Cancer Research ,Small interfering RNA ,Lung Neoplasms ,Drug Evaluation, Preclinical ,Review ,Disease ,Biology ,lcsh:RC254-282 ,Cancer Vaccines ,anti-miRs ,03 medical and health sciences ,RNA interference ,0302 clinical medicine ,microRNA ,Biomarkers, Tumor ,medicine ,Animals ,Humans ,RNA, Antisense ,RNA, Messenger ,Lung cancer ,Survival rate ,Antisense oligonucleotides ,Clinical Studies as Topic ,Antagomirs ,RNA ,Genetic Therapy ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,medicine.disease ,Combined Modality Therapy ,Clinical trial ,MicroRNAs ,Treatment Outcome ,030104 developmental biology ,Oncology ,030220 oncology & carcinogenesis ,Cancer research ,Molecular Medicine ,mRNA-vaccine - Abstract
Lung cancer (LC) is a heterogeneous disease consisting mainly of two subtypes, non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC), and remains the leading cause of death worldwide. Despite recent advances in therapies, the overall 5-year survival rate of LC remains less than 20%. The efficacy of current therapeutic approaches is compromised by inherent or acquired drug-resistance and severe off-target effects. Therefore, the identification and development of innovative and effective therapeutic approaches are critically desired for LC. The development of RNA-mediated gene inhibition technologies was a turning point in the field of RNA biology. The critical regulatory role of different RNAs in multiple cancer pathways makes them a rich source of targets and innovative tools for developing anticancer therapies. The identification of antisense sequences, short interfering RNAs (siRNAs), microRNAs (miRNAs or miRs), anti-miRs, and mRNA-based platforms holds great promise in preclinical and early clinical evaluation against LC. In the last decade, RNA-based therapies have substantially expanded and tested in clinical trials for multiple malignancies, including LC. This article describes the current understanding of various aspects of RNA-based therapeutics, including modern platforms, modifications, and combinations with chemo-/immunotherapies that have translational potential for LC therapies.
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- 2021
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6. Molecular implications of MUC5AC-CD44 axis in colorectal cancer progression and chemoresistance
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Jesse L. Cox, Rama Krishna Nimmakayala, Sukhwinder Kaur, Shiv Ram Krishn, Sanjib Chaudhary, Koelina Ganguly, Ramesh Pothuraju, Satyanarayana Rachagani, Kavita Mallya, Surinder K. Batra, Imayavaramban Lakshmanan, and Jawed A. Siddiqui
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0301 basic medicine ,Cancer Research ,Colorectal cancer ,Apoptosis ,Mucin 5AC ,medicine.disease_cause ,Mice ,0302 clinical medicine ,RNA interference ,Antineoplastic Combined Chemotherapy Protocols ,Tumor Cells, Cultured ,5′-fluorouracil ,CD44 ,Wnt Signaling Pathway ,beta Catenin ,Gene knockdown ,LGR5 ,respiratory system ,Prognosis ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,Colon cancer ,3. Good health ,Gene Expression Regulation, Neoplastic ,Oxaliplatin ,Survival Rate ,Hyaluronan Receptors ,Oncology ,030220 oncology & carcinogenesis ,Disease Progression ,Molecular Medicine ,Fluorouracil ,Colorectal Neoplasms ,Chemoresistance ,β-Catenin ,Mice, Nude ,Biology ,digestive system ,lcsh:RC254-282 ,03 medical and health sciences ,Biomarkers, Tumor ,medicine ,Animals ,Humans ,Cell Proliferation ,Research ,Mucin ,Mucins ,MUC5AC ,medicine.disease ,Xenograft Model Antitumor Assays ,digestive system diseases ,030104 developmental biology ,Drug Resistance, Neoplasm ,Cancer research ,biology.protein ,Carcinogenesis - Abstract
BackgroundDifferential expression of mucins has been associated with several cancers including colorectal cancer (CRC). In normal physiological conditions, secretory mucin MUC5AC is not expressed in the colonic mucosa, whereas its aberrant expression is observed during development of colon cancer and its precursor lesions. To date, the molecular mechanism of MUC5AC in CRC progression and drug resistance remains obscure.MethodsMUC5AC expression was determined in colon tissue microarray by immunohistochemistry. A RNA interference and CRISPR/Cas9-mediated system was used to knockdown/knockout the MUC5AC in CRC cell lines to delineate its role in CRC tumorigenesis using in vitro functional assays and in vivo (sub-cutaneous and colon orthotopic) mouse models. Finally, CRC cell lines and xenograft models were used to identify the mechanism of action of MUC5AC.ResultsOverexpression of MUC5AC is observed in CRC patient tissues and cell lines. MUC5AC expression resulted in enhanced cell invasion and migration, and decreased apoptosis of CRC cells. MUC5AC interacted with CD44 physically, which was accompanied by the activation of Src signaling. Further, the presence of MUC5AC resulted in enhanced tumorigenesis and appearance of metastatic lesions in orthotopic mouse model. Additionally, up-regulation of MUC5AC resulted in resistance to 5-fluorouracil (5-FU) and oxaliplatin, and its knockout increased sensitivity to these drugs. Finally, we observed that up-regulation of MUC5AC conferred resistance to 5-FU through down-regulation of p53 and its target genep21and up-regulation of β-catenin and its target genesCD44andLgr5.ConclusionOur findings suggest that differential expression of secretory mucin MUC5AC results in enhanced tumorigenesis and also confers chemoresistance via CD44/β-catenin/p53/p21 signaling.
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- 2020
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7. microRNAs Orchestrate Pathophysiology of Breast Cancer Brain Metastasis: Advances in Therapy
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Ranjana Kanchan, Jawed A. Siddiqui, Mohd W. Nasser, Sidharth Mahapatra, and Surinder K. Batra
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0301 basic medicine ,Cancer Research ,Breast Neoplasms ,Review ,Biology ,lcsh:RC254-282 ,Metastasis ,03 medical and health sciences ,Therapeutic approach ,0302 clinical medicine ,Breast cancer ,Epidermal growth factor ,microRNA ,Biomarkers, Tumor ,medicine ,Animals ,Humans ,Molecular Targeted Therapy ,miRNA ,Blood-brain barrier ,Brain Neoplasms ,Breast cancer brain metastasis ,lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,medicine.disease ,3. Good health ,Gene Expression Regulation, Neoplastic ,MicroRNAs ,Crosstalk (biology) ,030104 developmental biology ,CNS metastasis ,Oncology ,030220 oncology & carcinogenesis ,Cancer cell ,Cancer research ,Molecular Medicine ,Female ,Brain tumor microenvironment ,Brain metastasis - Abstract
Brain metastasis (BM) predominantly occurs in triple-negative (TN) and epidermal growth factor 2 (HER2)-positive breast cancer (BC) patients, and currently, there is an unmet need for the treatment of these patients. BM is a complex process that is regulated by the formation of a metastatic niche. A better understanding of the brain metastatic processes and the crosstalk between cancer cells and brain microenvironment is essential for designing a novel therapeutic approach. In this context, the aberrant expression of miRNA has been shown to be associated with BM. These non-coding RNAs/miRNAs regulate metastasis through modulating the formation of a metastatic niche and metabolic reprogramming via regulation of their target genes. However, the role of miRNA in breast cancer brain metastasis (BCBM) is poorly explored. Thus, identification and understanding of miRNAs in the pathobiology of BCBM may identify a novel candidate miRNA for the early diagnosis and prevention of this devastating process. In this review, we focus on understanding the role of candidate miRNAs in the regulation of BC brain metastatic processes as well as designing novel miRNA-based therapeutic strategies for BCBM.
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- 2020
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8. A naturally occurring rare analog of quercetin promotes peak bone mass achievement and exerts anabolic effect on osteoporotic bone
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Gaurav Swarnkar, Preeti Rawat, Abnish K. Gautam, Jawed A. Siddiqui, M. Kumar, Lakshmi Manickavasagam, Naibedya Chattopadhyay, Varsha Gupta, Bandana Chakravarti, Anil Kumar Dwivedi, Kunal Sharan, and Rakesh Maurya
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Peak bone mass ,medicine.medical_specialty ,Ovariectomy ,Endocrinology, Diabetes and Metabolism ,Calvaria ,Rats, Sprague-Dawley ,Glucosides ,Bone Density ,Bone Marrow ,Osteogenesis ,Internal medicine ,medicine ,Animals ,Femur ,Bone mineral ,Osteoblasts ,Tibia ,business.industry ,Osteoblast ,X-Ray Microtomography ,medicine.disease ,Hindlimb ,Rats ,Osteopenia ,Bone Diseases, Metabolic ,medicine.anatomical_structure ,Endocrinology ,Ovariectomized rat ,Female ,Quercetin ,Cortical bone ,Bone marrow ,business ,Chromatography, Liquid - Abstract
The effect of quercetin C-glucoside (QCG) on osteoblast function in vitro and bone formation in vivo was investigated. QCG supplementation promoted peak bone mass achievement in growing rats and new bone formation in osteopenic rats. QCG has substantial oral bioavailability. Findings suggest a significant bone anabolic effect of QCG.Recently, we showed that extracts of Ulmus wallichiana promoted peak bone mass achievement in growing rats and preserved trabecular bone mass and cortical bone strength in ovariectomized (OVx) rats. 3,3',4',5,7-Pentahydroxyflavone-6-C-β-D-glucopyranoside, a QCG, is the most abundant bioactive compound of U. wallichiana extract. We hypothesize that QCG exerts bone anabolic effects by stimulating osteoblast function.Osteoblast cultures were harvested from rat calvaria and bone marrow (BM) to study differentiation and mineralization. In vivo, growing female Sprague Dawley rats and OVx rats with osteopenia were administered QCG (5.0 or 10.0 mg kg(-1) day(-1)) orally for 12 weeks. Efficacy was evaluated by examining changes in bone microarchitecture using histomorphometric and microcomputed tomographic analyses and by determination of new bone formation by fluorescent labeling of bone. Plasma and BM levels of QCG were determined by high-performance liquid chromatography.QCG was much more potent than quercetin (Q) in stimulating osteoblast differentiation, and the effect of QCG was not mediated by estrogen receptors. In growing rats, QCG increased BM osteoprogenitors, bone mineral density, bone formation rate, and cortical deposition. In osteopenic rats, QCG treatment increased bone formation rate and improved trabecular microarchitecture. Comparison with the sham group (ovary intact) revealed significant restoration of trabecular bone in osteopenic rats treated with QCG. QCG levels in the BM were ~50% of that of the plasma levels.QCG stimulated modeling-directed bone accrual and exerted anabolic effects on osteopenic rats by direct stimulatory effect on osteoprogenitors likely due to substantial QCG delivery at tissue level following oral administration.
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- 2011
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