119 results on '"Sharma KS"'
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2. Pressure dependence of the superconducting state parameters of metallic glass superconductor Mg70Zn30
- Author
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Gupta, Manish, Sharma, KS, and Dass, Lachhman
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- 1999
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3. On the distance energy of k-uniform hypergraphs
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Sharma Kshitij and Panda Swarup Kumar
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hypergraph ,distance matrix ,distance degree ,spectral radius ,distance energy ,hyperstar ,05c15 ,05c50 ,05c65 ,15a18 ,Mathematics ,QA1-939 - Abstract
In this article, we extend the concept of distance energy for hypergraphs. We first establish a relation between the distance energy and the distance spectral radius. Then, we obtain some bounds for the distance energy in terms of some invariant of hypergraphs such as the determinant of the distance matrix, number of vertices, and Wiener index along with the distance energy of join of kk-uniform hypergraphs. Furthermore, it is shown that the determinant of the distance matrix of kk-uniform hyperstar on nn vertices is (−1)n−1(n−1)kn−kk−1{\left(-1)}^{n-1}\left(n-1){k}^{\tfrac{n-k}{k-1}}. Later, the distance spectrum of kk-uniform hyperstar is obtained, which gives the explicit distance energy of kk-uniform hyperstar.
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- 2023
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4. Leukaemia with pregnancy managed at B. P. Koirala Memorial Cancer Hospital
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Pariyar, J, primary, Shrestha, B, primary, Acharya, BC, primary, Sharma, KS, primary, Shrestha, J, primary, Shrestha, S, primary, Sundas, S, primary, and Panthee, S, primary
- Published
- 2018
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5. Gynecological malignancies in pediatric and adolescent group: a ten year experience in a national cancer center of Nepal
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Sharma, KS, primary, Pariyar, J, primary, Misra, D, primary, Mehta, S, primary, and Panthee, S, primary
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- 2018
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6. IoT and AI Integration: An Experiment on Smart Manufacturing Efficiency in Industry 5.0
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Dmitrieva Ekaterina, Krishna Gopal, Chhabra Soosan, Pavithra Avvari, and Sharma Kshama
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data-driven decision-making ,industry 5.0 ,iot ,ai ,smart manufacturing ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
In line with the Industry 5.0 paradigm, this empirical research offers a data-driven investigation of the revolutionary effects of combining IoT and AI in smart manufacturing. The findings show a notable 1.52% gain in production efficiency, which is attributed to post-implementation temperature increases of 36.2°C and humidity decreases of 44.8%. A decrease in faults found (2) led to a 0.76% increase in quality scores (93.1) for quality control. With fewer maintenance hours (2.3) and downtime (52 minutes), maintenance practices were more effective. These results highlight the concrete advantages of integrating IoT and AI in smart manufacturing, putting it at the vanguard of Industry 5.0's revolutionary landscape and improving productivity, quality, and maintenance.
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- 2024
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7. Leveraging Big Data Analytics for Urban Planning: A Study Using the Big Data Analytics Efficiency Test
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Elena Vasilieva, Singh Rajat, Sobti Rajeev, Sharma Kshama, Sharma Rajat, and Surekha P.
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big data analytics ,urban planning ,data analytics infrastructure ,data volume ,processing time ,urban development projects ,efficiency test ,data-driven decision-making ,sustainable urban development ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
Data from a variety of sample cities was evaluated as part of a research looking into the integration of big data analytics into urban planning. The goals were to evaluate the impact of data analytics infrastructure, data volume and processing time, urban development initiatives, and data analytics efficiency. The results showed significant differences in data analytics resources across cities, indicating different levels of investment and preparedness for data-driven decision making. It was clear that cities could handle large amounts of data efficiently thanks to their strong data processing skills. Data analytics have an impact on urban development initiatives, highlighting the revolutionary potential of data-driven urban planning. The outcomes of efficiency tests demonstrated how data analytics procedures are useful for improving urban services and for making well-informed judgments. This study offers important new insights into the mechanics of data-driven urban planning and how it can influence how cities develop in the future.
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- 2024
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8. Analysing Urban Social Networks for Civic Participation: Data-Intensive Insights from the Civic Participation Test
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Ivanovich Vatin Nikolai, Kumar Shah Sanjeev, Shruthi CH.M., Sharma Kshama, and Saxena Sunny
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impact from social networks ,community involvement ,urban social networks ,demographic diversity ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
This research delves into the dynamics of civic engagement in urban settings. The sample of participants was broad, with ages ranging from 22 to 40 years, nearly equal gender distribution (52% female, 48% male), and a range of educational backgrounds, including postgraduates (35%), bachelor's degree holders (40%), and high school graduates (25%). Numerous chances for participation exist in urban environments, as seen by our examination of data on civic activities. These include voter registration campaigns, town hall meetings, and community clean-up initiatives. In addition, members' responsibilities in these activities varied: 35% attended events, 15% made financial contributions, and 45% actively volunteered. Our results highlight the significance of social networks in urban civic engagement by showing that individuals with a wide range of social connections were more likely to participate in civic activities. The study's findings highlight the complex nature of civic participation in cities and have applications for encouraging diversity and community building in urban environments.
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- 2024
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9. Augmented Reality and AI: An Experimental Study of Worker Productivity Enhancement
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Rymarov Andrey, Chandramauli Awadhesh, Sharma Gazal, Sharma Kshama, and Kumar Yogesh
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technology integration ,artificial intelligence ,worker productivity ,augmented reality ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
The purpose of this experimental investigation is to determine how worker productivity may be enhanced by Augmented Reality (AR) and Artificial Intelligence (AI). Participants in the AR condition reported completing tasks 16% faster on average and receiving a high user satisfaction rating of 4.56 out of 5. Participants in the AI condition reported a 4.3 feedback rating and a 13% decrease in task completion time. Surprisingly, productivity increased by a remarkable 22% with an average score of 62 when AR and AI were coupled. These results demonstrate how AR and AI technologies may significantly increase worker productivity in real-world work environments, highlighting their importance for companies looking to maximize labor effectiveness and decision-making procedures.
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- 2024
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10. Data Analytics for Dynamic Urban Operations: A Test-Based Study on Data Analytics Efficiency
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Dmitrieva Ekaterina, Singh Digvijay, Kumar Suresh, Sharma Kshama, K Mishra Sudipta, and Lavanya G.
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efficiency ,data-driven decision-making ,urban operations ,data analytics ,user pleasure ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Abstract
This paper explores the field of data analytics for dynamic urban operations and provides a systematic analysis of the importance and possible implications of this field. Our investigation indicates significant data volumes in an urban setting that is data-rich: 500 GB are generated by traffic sensors, 300 GB by environmental monitors, 150 GB by mobile apps, and 75 GB by emergency calls. A variety of analytics techniques, each with a different processing time, are built upon these data sources. These techniques include descriptive, predictive, prescriptive, and diagnostic analytics. The outcomes, which include 90% accuracy, an average processing time of 40 minutes, 80% resource utilization, and 4.2 user satisfaction ratings, highlight the benefits of data analytics. According to the comparison study, diagnostic analytics has a score of 7.8, indicating room for development, while prescriptive analytics leads with an efficiency score of 8.4. As urban stakeholders and academics work to improve urban systems and solve urban issues, the results give a thorough understanding of the effectiveness and application of data analytics in the context of dynamic urban operations.
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- 2024
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11. Phase-controlled formation of NixPy catalyst using environmental TEM for potential application in CO2 reduction
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Sharma Kshipra, Hu Tianyi, and Dick Kimberly A.
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nickel phosphide ,phase engineering ,in-situ ,Microbiology ,QR1-502 ,Physiology ,QP1-981 ,Zoology ,QL1-991 - Published
- 2024
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12. Modelling the Impact of Road Dust on Air Pollution: A Sustainable System Dynamics Approach
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Khan Sarah, Hassan Quamrul, Kumar Kaushal, Dixit Saurav, Sharma Kshama, C. Vivek Kumar, Dhaliwal Navdeep, and Madhu Bhukya
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sustainable approach ,system dynamics ,air pollution ,road dust ,modelling ,construction activities ,Environmental sciences ,GE1-350 - Abstract
Road dust contributes significantly to air pollution by releasing fine particulate matter (PM) and other pollutants into the air, which can cause respiratory and cardiovascular problems and premature death. This dust is generated through the wear and tear of vehicle tires and road surfaces, as well as the accumulation of dirt and debris on the road, primarily from construction activities and cargo trucks carrying building materials. Wind, weather conditions, and vehicle movement play crucial roles in the distribution and concentration of these particles in the air. To address this issue, this paper focuses on identifying various variables that are connected to road dust operations and their interrelationships with air pollution variables, representing the dynamic pattern of the entire system. The paper proposes the establishment of a sustainable causal-loop model using system dynamics (SD) modeling in Vensim, connecting feedback mechanisms to effectively control the road dust concentration. Additionally, the paper suggests different policy interventions applied to the whole system to achieve optimized results. In the future, this research aims to convert and simulate the causal-loop model to a stock-flow model and compare the effectiveness of different policy interventions to further reduce road dust contributing to air pollution.
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- 2023
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13. Green and Sustainable Manufacturing with Implications of ESG In Energy Sector: A Comprehensive Review
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Sharma Kshama, Bhattacharjee Priyanka, Arora Rishabh, Kumar Kaushal, Kirola Madhu, Kumar Awaar Vinay, Ahuja Suniana, and Ganesh Bande
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sustainable ,environmental ,social, and governance (esg) ,energy ,trends ,challenges ,Environmental sciences ,GE1-350 - Abstract
Environmental, social, and corporate governance, which is commonly shortened to ESG, is becoming an increasingly important part of the oil and gas industry as it faces a transition towards the usage of renewable energy sources. Today, businesses are increasingly looking for new ways to promote ESG initiatives, as a growing number of customers and investors are urging organisations to take ESG issues more seriously. Businesses are also looking for new ways to promote initiatives related to environmental, social, and governance (ESG) issues. This pattern can be explained by the fact that consumers are becoming more conscious of the significance of the problems being addressed. Even if the pressure on oil and gas companies is rising, the sector now has a lot of alternatives thanks to the increased emphasis on environmental, social, and governance concerns. This paper explores how ESG is redefining the sustainable energy sector as well as the reasons why it is necessary for businesses to address environmental challenges and adapt to this new paradigm. In addition, it explains how ESG is transforming the energy industry.
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- 2023
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14. BIOCHEMICAL AND HISTOCHEMICAL STUDIES ON WHITE, BROWN AND BLACK SKIN REGIONS OF THE GUINEA PIG
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Sharma Ks, Shah Vc, Mojamdar Mv, and Chinoy Nj
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Histology ,Succinic dehydrogenase ,integumentary system ,biology ,Physiology ,Cell Biology ,Ascorbic acid ,Biochemistry ,Pathology and Forensic Medicine ,Melanin ,White (mutation) ,Guinea pig ,biology.protein ,SKIN REGIONS ,Tyrosine ,Peroxidase - Abstract
Biochemical and histochemical studies were conducted on three different skin regions-black, brown and white-of the guinea pig, with special reference to melanogenesis. Ascorbic acid, ascorbic acid free radical forming special peroxidase and net bound ascorbic acid were found to be more in the brown skin followed by the black and white skins respectively. The brown skin region was also rich in succinic dehydrogenase, ascorbigen and tyrosine than the white and black skin regions. The capacity to utilize ascorbic acid was high in the black skin region, whereas, the white skin showed the highest concentration of proteins.The histochemical study revealed a greater activity of succinic dehydrogenase, ascorbic acid free radical forming special peroxidase and ascorbic acid in the actively growing melanin synthesizing hair follicles, whereas, the developing hair follicles in the white region stained more intensely for proteins.
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- 1973
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15. SULFHYDRYL LEVELS IN PIGMENT SYNTHESIZING AND NON-PIGMENT SYNTHESIZING SKINS OF RODENTS
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Shah Vc, Sharma Ks, Mojamdar Mv, and Chinoy Nj
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chemistry.chemical_classification ,Sh groups ,Histology ,integumentary system ,Physiology ,Cell Biology ,Anatomy ,Biology ,Biochemistry ,Molecular biology ,Pathology and Forensic Medicine ,Bulb ,Staining ,Guinea pig ,Pigment ,chemistry ,visual_art ,Keratin ,visual_art.visual_art_medium ,SKIN REGIONS ,Goldstone - Abstract
Sulfhydryl groups (-SH) are one of the most potent inhibitors of melanogenesis (Flesch, 1949; Flesch and Goldstone, 1950), and are believed to be one of the causes leading to leucoderma in human beings (Lerner and Fitzpatrick, 1950). Histochemical and biochemical studies of -SH groups were therefore carried out in black, brown and white skin regions of the guinea pig and the skins of the albino and black rats. In general, the albino rat skin showed the highest concentration of -SH groups followed by the white skin region of the guinea pig. The black skin region of the guinea pig and the black rat skin had moderate amounts of -SH groups, whereas the brown skin region of the guinea pig showed the lowest concentrations.Histochemical localization of -SH revealed intense staining in the hair bulb of the white rat and the white skin region of the guinea pig. The black rat skin as well as the other skin areas of the guinea pig showed lesser staining of -SH groups. The importance of -SH groups in melanogenesis and keratinization are discussed.
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- 1973
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16. Visible-Light-Induced Secondary Benzylic C(sp 3 )-H Functionalization for Nucleophilic Substitution: An Intermolecular C-X (C-N, C-C, and C-Br) Bond Forming Reaction.
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Sharma KS, Thadem N, and Pandey G
- Abstract
Exploring new synthetic methods that harness visible light represents a breakthrough in organic synthesis. Amides, amines, nitriles, and halides are essential functional groups and serve as key building blocks in the synthesis of complex molecules in organic and medicinal chemistry. This study introduces a novel intermolecular benzylic C-X (C-N, C-C, and C-Br) bond formation via photoredox benzylic C(sp
3 )-H bonds. This methodology enables the synthesis of secondary amides, nitriles, and halides through reacting secondary benzylic substrates with readily accessible reagents including BocNH2 , benzamide, acetamide, TMSCN, and TBAB. This approach displays the potential of being sustainable and efficient to afford amidation, cyanation, and halogenation products in good yields.- Published
- 2025
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17. Risk factors of gallbladder cancer in Nepal: A case control study.
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Thakur C, Mahato RK, Marasini S, Timalsena D, Sharma KS, and Karmacharya BM
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- Humans, Nepal epidemiology, Female, Male, Middle Aged, Case-Control Studies, Risk Factors, Adult, Aged, Gallbladder Neoplasms epidemiology, Gallbladder Neoplasms etiology
- Abstract
Background: Gallbladder cancer (GBC) is a rare, highly fatal disease with diagnosis in advanced stage and low survival rate. Nepal ranked 4th position with highest rates of GBC for 10 countries in 2020., Objective: To find the association between socio-demographic, behavioral and environmental factors associated with the development of GBC., Method: A case-control study was conducted in 2021/22 with newly diagnosed gallbladder cancer cases from three cancer-specialized hospitals and one tertiary (superspeciality) hospital. Controls were selected from the same tertiary hospital and one additional hospital providing services to gallbladder pathologies for a huge population, making a total of five hospitals involved in the study. The ratio of cases to control was 1:1. The data collection was done through telephonic interviews using structured questionnaires. The risk factors for GBC were assessed by using unconditional logistic regression to find odds ratios and 95% confidence level for bivariate and multivariate analysis. The statistical analysis was carried out in STATA 18., Result: A total of 240 respondents were enrolled in the study, among them half were GBC patients (cases) and half were gallbladder patients (controls). The average age of the respondents was 54.82±12.3 years, with female preponderance among both groups. On multivariate analysis, the risk factors studied were; parity ≥3 (AOR = 2.80, 95% CI: 1.17-6.66, P value 0.020), being ethnic group of Terai/Madhesi (AOR = 7.88, 95% CI: 3.16-19.66, P value <0.001), being Janajati (AOR = 3.36, 95% CI: 1.17-6.61, P value <0.001), having gallbladder related disease (AOR = 2.00, 95% CI:1.00-4.02, P value 0.049), consuming alcohol ≥100ml/day (AOR = 3.44, 95% CI:1.11-10.63, P value 0.032), exposed with pesticides ≥2 times in a year (AOR = 4.04, 95% CI: 1.27-12.89, P value 0.018) and consuming less vegetables and fruits (<1 times per day in a week) (AOR = 2.69, 95% CI:1.34-5.40, P value 0.005)., Conclusion: The study reveals key GBC risk factors, offering vital insights for targeted screening, resource allocation, and public health measures to mitigate risks in Nepal., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2025 Thakur et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2025
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18. Targeting Metastasis in Head and Neck Squamous Cell Carcinoma Using Follistatin mRNA Lipid Nanoparticles.
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Grigoriev V, Korzun T, Moses AS, Jozic A, Zhu X, Kim J, Newton S, Eygeris Y, Diba P, Sattler AL, Levasseur PR, Olson B, Le N, Singh P, Sharma KS, Goo YT, Mamnoon B, Raitmayr C, Mesquita Souza AP, Taratula OR, Sahay G, Marks DL, and Taratula O
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- Animals, Mice, Humans, Neoplasm Metastasis, Activins metabolism, Cell Line, Tumor, Lipids chemistry, Liposomes, Follistatin metabolism, Nanoparticles chemistry, RNA, Messenger genetics, RNA, Messenger metabolism, Head and Neck Neoplasms pathology, Head and Neck Neoplasms metabolism, Head and Neck Neoplasms genetics, Head and Neck Neoplasms drug therapy, Squamous Cell Carcinoma of Head and Neck pathology, Squamous Cell Carcinoma of Head and Neck drug therapy, Squamous Cell Carcinoma of Head and Neck genetics, Squamous Cell Carcinoma of Head and Neck metabolism
- Abstract
Metastatic progression significantly reduces survival rates and complicates treatment strategies in various cancers. Our study introduces an mRNA therapy for metastasis inhibition by targeting activin A overexpression, a pivotal driver of metastasis and cachexia. Utilizing follistatin mRNA lipid nanoparticles, we effectively downregulated activin A both locally in the tumor environment and systemically. This led to a reduction in tumor burden and suppression of metastatic spread in a murine head and neck squamous cell carcinoma model. Treated mice exhibited minimal metastatic occurrence compared to controls. Additionally, our therapy preserved the cross-sectional area of muscle fibers and adipose tissues, combating the muscle and fat wasting typically observed in cancer-associated cachexia. The therapy also demonstrated a favorable safety profile, underscoring its potential for clinical translation. By integrating metastasis-suppressing and cachexia-alleviating mechanisms, our approach represents a promising advancement in comprehensive cancer management. Considering the widespread upregulation of activin A in many cancer types, our therapy holds considerable potential for application across a broad spectrum of oncologic treatments.
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- 2024
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19. Inhibit-AND logic gate enabled versatile BoF-AgNPs as ultrasensitive and selective nanoprobe for Mn(II) ions and nanocatalyst for rapid MB decoloration.
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Sharma KS, Panchal K, and Kumar D
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- Catalysis, Plant Leaves chemistry, Plant Extracts chemistry, Plant Extracts analysis, Limit of Detection, Ions chemistry, Logic, Manganese chemistry, Manganese analysis, Silver chemistry, Metal Nanoparticles chemistry, Water Pollutants, Chemical analysis
- Abstract
There is great interest in fabricating devices that can detect and remove water pollutants, especially heavy metal ions and dyes from wastewater, to promote sustainable water use. In this study, an extract of Borassus flabellifer leaves (BoF-LE) was used to synthesize silver nanoparticles (BoF-AgNPs), with the BoF-LE serving as a reducing and capping agent. The sensitivity and selectivity of BoF-AgNPs for Mn(II) ions were tested by comparing with the control sample and other competent metal ions. Our results showed that BoF-AgNPs are extremely sensitive and selective in detecting Mn(II) ions, with a detection limit of 0.3 ppb. HR-TEM, UV-Vis spectroscopy, and DLS investigations were used to confirm that BoF-AgNPs detect Mn(II) ions by an aggregation-based mechanism. Additionally, it was found that BoF-AgNPs are effective in rapidly decolorizing MB dye, as demonstrated by their ability to decolorize MB by 92.66% within 7 min. This study is the first to report successful synthesis of BoF-AgNPs and their two applications, which are enabled with an Inhibit-AND logic gate. Using BoF-AgNPs to detect and degrade water pollutants may promote sustainable water use., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Kritika S. Sharma reports financial support was provided by Department of Science and Technology (DST), Ministry of Science & Technology, India. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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20. Lipid Nanoparticles Elicit Reactogenicity and Sickness Behavior in Mice Via Toll-Like Receptor 4 and Myeloid Differentiation Protein 88 Axis.
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Korzun T, Moses AS, Jozic A, Grigoriev V, Newton S, Kim J, Diba P, Sattler A, Levasseur PR, Le N, Singh P, Sharma KS, Goo YT, Mamnoon B, Raitmayr C, Mesquita Souza AP, Taratula OR, Sahay G, Taratula O, and Marks DL
- Subjects
- Animals, Mice, Lipids chemistry, Signal Transduction drug effects, Male, Liposomes, Nanoparticles chemistry, Toll-Like Receptor 4 metabolism, Myeloid Differentiation Factor 88 metabolism, Illness Behavior drug effects, Mice, Inbred C57BL
- Abstract
mRNA therapeutics encapsulated in lipid nanoparticles (LNPs) offer promising avenues for treating various diseases. While mRNA vaccines anticipate immunogenicity, the associated reactogenicity of mRNA-loaded LNPs poses significant challenges, especially in protein replacement therapies requiring multiple administrations, leading to adverse effects and suboptimal therapeutic outcomes. Historically, research has primarily focused on the reactogenicity of mRNA cargo, leaving the role of LNPs understudied in this context. Adjuvanticity and pro-inflammatory characteristics of LNPs, originating at least in part from ionizable lipids, may induce inflammation, activate toll-like receptors (TLRs), and impact mRNA translation. Knowledge gaps remain in understanding LNP-induced TLR activation and its impact on induction of animal sickness behavior. We hypothesized that ionizable lipids in LNPs, structurally resembling lipid A from lipopolysaccharide, could activate TLR4 signaling via MyD88 and TRIF adaptors, thereby propagating LNP-associated reactogenicity. Our comprehensive investigation utilizing gene ablation studies and pharmacological receptor manipulation proves that TLR4 activation by LNPs triggers distinct physiologically meaningful responses in mice. We show that TLR4 and MyD88 are essential for reactogenic signal initiation, pro-inflammatory gene expression, and physiological outcomes like food intake and body weight─robust metrics of sickness behavior in mice. The application of the TLR4 inhibitor TAK-242 effectively reduces the reactogenicity associated with LNPs by mitigating TLR4-driven inflammatory responses. Our findings elucidate the critical role of the TLR4-MyD88 axis in LNP-induced reactogenicity, providing a mechanistic framework for developing safer mRNA therapeutics and offering a strategy to mitigate adverse effects through targeted inhibition of this pathway.
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- 2024
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21. Improved Tensor Current Limit from ^{8}B β Decay Including New Recoil-Order Calculations.
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Longfellow B, Gallant AT, Sargsyan GH, Burkey MT, Hirsh TY, Savard G, Scielzo ND, Varriano L, Brodeur M, Burdette DP, Clark JA, Lascar D, Launey KD, Mueller P, Ray D, Sharma KS, Valverde AA, Wilson GL, and Yan XL
- Abstract
A precision measurement of the β^{+} decay of ^{8}B was performed using the Beta-decay Paul Trap to determine the β-ν angular correlation coefficient a_{βν}. The experimental results were combined with new ab initio symmetry-adapted no-core shell-model calculations to yield the second-most precise measurement from Gamow-Teller decays, a_{βν}=-0.3345±0.0019_{stat}±0.0021_{syst}. This value agrees with the standard model value of -1/3 and improves uncertainties in ^{8}B by nearly a factor of 2. By combining results from ^{8}B and ^{8}Li, a tight limit on tensor current coupling to right-handed neutrinos was obtained. A recent global evaluation of all other precision β decay studies suggested a nonzero value for right-handed neutrino coupling in contradiction with the standard model at just above 3σ. The present results are of comparable sensitivity and do not support this finding.
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- 2024
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22. Targeted Nanocarriers for Systemic Delivery of IRAK4 Inhibitors to Inflamed Tissues.
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Park Y, Korzun T, Moses AS, Singh P, Levasseur PR, Demessie AA, Sharma KS, Morgan T, Raitmayr CJ, Avila U, Sabei FY, Taratula OR, Marks DL, and Taratula O
- Subjects
- Mice, Animals, Cytokines, Inflammation drug therapy, Edema, Interleukin-1 Receptor-Associated Kinases chemistry, Colitis
- Abstract
Persistent and uncontrolled inflammation is the root cause of various debilitating diseases. Given that interleukin-1 receptor-associated kinase 4 (IRAK4) is a critical modulator of inflammation, inhibition of its activity with selective drug molecules (IRAK4 inhibitors) represents a promising therapeutic strategy for inflammatory disorders. To exploit the full potential of this treatment approach, drug carriers for efficient delivery of IRAK4 inhibitors to inflamed tissues are essential. Herein, the first nanoparticle-based platform for the targeted systemic delivery of a clinically tested IRAK4 inhibitor, PF-06650833, with limited aqueous solubility (57 µg mL
-1 ) is presented. The developed nanocarriers increase the intrinsic aqueous dispersibility of this IRAK4 inhibitor by 40 times. A targeting peptide on the surface of nanocarriers significantly enhances their accumulation after intravenous injection in inflamed tissues of mice with induced paw edema and ulcerative colitis when compared to non-targeted counterparts. The delivered IRAK4 inhibitor markedly abates inflammation and dramatically suppresses paw edema, mitigates colitis symptoms, and reduces proinflammatory cytokine levels in the affected tissues. Importantly, repeated injections of IRAK4 inhibitor-loaded nanocarriers have no acute toxic effect on major organs of mice. Therefore, the developed nanocarriers have the potential to significantly improve the therapeutic efficacy of IRAK4 inhibitors for different inflammatory diseases., (© 2023 Wiley-VCH GmbH.)- Published
- 2024
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23. Direct Mass Measurements to Inform the Behavior of ^{128m}Sb in Nucleosynthetic Environments.
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Hoff DEM, Kolos K, Misch GW, Ray D, Liu B, Valverde AA, Brodeur M, Burdette DP, Callahan N, Clark JA, Gallant AT, Kondev FG, Morgan GE, Mumpower MR, Orford R, Porter WS, Rivero F, Savard G, Scielzo ND, Sharma KS, Sieja K, Sprouse TM, and Varriano L
- Abstract
Nuclear isomer effects are pivotal in understanding nuclear astrophysics, particularly in the rapid neutron-capture process where the population of metastable isomers can alter the radioactive decay paths of nuclei produced during astrophysical events. The β-decaying isomer ^{128m}Sb was identified as potentially impactful since the β-decay pathway along the A=128 isobar funnels into this state bypassing the ground state. We report the first direct mass measurements of the ^{128}Sb isomer and ground state using the Canadian Penning Trap mass spectrometer at Argonne National Laboratory. We find mass excesses of -84564.8(25) keV and -84608.8(21) keV, respectively, resulting in an excitation energy for the isomer of 43.9(33) keV. These results provide the first key nuclear data input for understanding the role of ^{128m}Sb in nucleosynthesis, and we show that it will influence the flow of the rapid neutron-capture process.
- Published
- 2023
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24. Current strategies for the management of psoriasis with potential pharmacological pathways using herbals and immuno-biologicals.
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Sharma KS and Kumar S
- Abstract
Background: Psoriasis is an acute to chronic multifunctional inflammatory skin disorder mediated through T-cell activation, dendritic cell intervention, local vascular variations, atypical keratinocyte proliferation, and neutrophil activation, leading to a skin disorder with no permanent cure., Objective: This review aims to find a potent, secure, and dependable medication, with a more scientific examination of herbal resources and recent targeted immunobiological therapies., Method: Reports evaluating the effectiveness of biologics & herbal remedies for the topical therapy of psoriasis against control therapies were taken into consideration (placebo or active therapy). The work examined cellular circuits involved in inflammation with its immunogenetic mechanism behind various options available for treating psoriasis in addition to the role of agents inducing psoriasis., Results: The extent of psoriasis can range from small, localized spots to total body coverage, and it can happen at any stage of life. Several theories exist for clarification however, the exact cause of psoriasis is not entirely understood. Researchers have discovered genetic loci linkages, environmental changes, drug induction, lifestyle conditions, some infections, etc. resulting in this disorder. There are numerous known conventional medical treatments for psoriasis, ranging from topical and systemic medicines to phototherapy or combinations of both with recent immunobiological treatment. However, the majority of these treatments are ineffective and have a variety of side effects that limit their long-term usage, such as cutaneous atrophy, tissue toxicity, mutagenicity, and immunosuppression., Conclusion: Herbal extracts or isolated compounds can be considered as a substitute for conventional psoriasis treatment. Unfortunately, many investigations often provide a small amount of facts about the safety and effectiveness of topically applied herbal remedies for the treatment of psoriasis. Thus, further factual evidences and validations are needed to promote herbal options, which must be supported by rigorous animal studies or clinical trials using standardised materials and compositions., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2023
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25. Raman Spectroscopy to Enhance Investigative Lead Information in Automotive Clearcoats.
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Affadu-Danful GP, Zhong H, Dahal KS, Kalkan K, Zhang L, and Lavine BK
- Abstract
A new method to determine the make and model of a vehicle from an automotive paint sample recovered at the crime scene of a vehicle-related fatality such as a hit-and-run using Raman microscopy has been developed. Raman spectra were collected from 118 automotive paint samples from six General Motors (GM) vehicle assembly plants to investigate the discrimination power of Raman spectroscopy for automotive clearcoats using a genetic algorithm for pattern recognition that incorporates model inference and sample error in the variable selection process. Each vehicle assembly plant pertained to a specific vehicle model. The spectral region between 1802 and 697 cm
-1 was found to be supportive of the discrimination of these six GM assembly plants. By comparison, only one of the six automotive assembly plants could be differentiated from the other five assembly plants using Fourier transform infrared spectroscopy (FT-IR), which is the most widely used analytical method for the examination of automotive paint) and the genetic algorithm for pattern recognition. The results of this study indicate that Raman spectroscopy in combination with pattern recognition methods offers distinct advantages over FT-IR for the identification and discrimination of automotive clearcoats.- Published
- 2023
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26. Does Baska mask deserve its own niche among extraglottic airway devices? A prospective, single-arm study.
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Shah V, Sharma KS, and Kulkarni AP
- Abstract
Background and Aims: A variety of extraglottic airway devices (EADs) are available. Main concerns with EADs are protection against aspiration and ability to ventilate patients with high airway pressures. Baska mask meets these criteria and is the only third-generation device available for clinical use., Methods: After institutional ethics committee approval and informed consent were obtained, this prospective study was performed in 100 adult patients undergoing surface surgeries at a tertiary referral centre. The primary outcome was the success rate of insertion, while the secondary outcomes were the sealing pressure, stability of the device and the perioperative complications of Baska mask. We then compared it with other currently used EADs., Results: The first attempt at insertion and overall success rates, showed values of 81% and 98%, respectively. Insertion was quick (median 12; interquartile range [IQR] 9-15 s). The mask sealing pressure, was 35 cmH
2 O (median [IQR 20-50 cmH2 O]). Also, the mask remained stable in 95% of patients intraoperatively. Sore throat and dysphagia were seen in 37% and 24% of patients, respectively. No patient had laryngospasm or desaturation at any time. It compared favourably well with other EADs, while achieving higher sealing pressures., Conclusion: We found that the Baska mask performs well with excellent first attempt at insertion and overall success rates, higher sealing pressures and minimal complications compared to currently used EADs in clinical anaesthesia., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Indian Journal of Anaesthesia.)- Published
- 2023
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27. Antiproliferative, molecular docking, and bioavailability studies of diarylheptanoids isolated from stem bark of Garuga pinnata Rox B.
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Konakanchi S, Vadluri R, Anumula KS, Narashimulu, Banothu D, and Krishna TM
- Abstract
Diarylheptanoids are a major class of plant secondary metabolites characterized by 1, 7-diphenyl heptanes in a seven-member carbon frame. In the present study, diarylheptanoids (garuganins 1, 3, 4 and 5) isolated from Garuga pinnata stem bark were evaluated for cytotoxic activity against MCF-7 and HCT15 cancer cell lines. Among the tested compounds, garuganin 5 and 3 exhibited the highest cytotoxic activity against HCT15 and MCF-7 with IC
50 2.9 ± 00.8 μg/mL, 3.3 ± 0.1 μg/mL and 3.2 ± 0.1 μg/mL, and 3.5 ± 0.3 μg/mL, respectively. The molecular docking of garuganin 1, 3, 4 and 5 exhibited significant affinity toward the tested EGFR 4Hjo protein. The free energy and inhibitory constant of the compounds ranged from - 7.47 to - 8.49 kcal/mol and 3.34 micromolar to 944.20 nM nanomolar, respectively. Based on the results of cytotoxic activity, garuganin 5 and 3 were further evaluated for time- and concentration-dependent intracellular accumulation studies. The time-dependent intracellular concentration of garuganin 3 and 5 after 5 h of incubation increased about 5.5- and 4.5-fold, 204.16 ± 0.02 and 145.4 ± 0.36 nmol/L mg, respectively. The concentration-dependent intracellular concentration of garuganin 3 and 5 at 200 µg/mL increased of about > 12- and ninefold, 186.22 ± 0.05 and 98.73 ± 0.02 nmol/L mg, respectively. The intracellular concentrations of garuganin 3 and 5, in the presence of verapamil, cyclosporine and MK 571, was found to be significant in the basal direction compared to the apical directions. The results indicate that, garuganin 3 and 5 exhibited significant cytotoxic activity against MCF-7 and HCT15 cancer cell lines and also exhibited high binding affinity toward EGFR protein compared to garuganin 1 and 4., Competing Interests: Conflict of interestThe authors disclose no conflict of financial or nonfinancial interest.Ethical statementsThe authors do not have any potential conflict of interest. This study does not involve any human beings or animals., (© King Abdulaziz City for Science and Technology 2023, Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.)- Published
- 2023
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28. Angular Correlations in the β Decay of ^{8}B: First Tensor-Current Limits from a Mirror-Nucleus Pair.
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Gallant AT, Scielzo ND, Savard G, Clark JA, Brodeur M, Buchinger F, Burdette DP, Burkey MT, Caldwell S, Crawford JE, Czeszumska A, Deibel CM, Greene J, Heslop D, Hirsh TY, Levand AF, Longfellow B, Morgan GE, Mueller P, Orford R, Padgett S, Paul N, Galván AP, Reimer A, Segel R, Sharma KS, Siegl K, Varriano L, and Zabransky BJ
- Abstract
We present the first measurement of the α-β-ν angular correlation in the Gamow-Teller β^{+} decay of ^{8}B. This was accomplished using the Beta-decay Paul Trap, expanding on our previous work on the β^{-} decay of ^{8}Li. The ^{8}B result is consistent with the V-A electroweak interaction of the standard model and, on its own, provides a limit on the exotic right-handed tensor current relative to the axial-vector current of |C_{T}/C_{A}|^{2}<0.013 at the 95.5% confidence level. This represents the first high-precision angular correlation measurements in mirror decays and was made possible through the use of an ion trap. By combining this ^{8}B result with our previous ^{8}Li results, we demonstrate a new pathway for increased precision in searches for exotic currents.
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- 2023
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29. Safety and clinical outcomes in endovascular treatment for symptomatic cerebral venous thrombosis: a single-center experience with meta-analysis.
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Tang SZ, Jing M, Yang C, Yeo LLL, Tan BY, Chan BPL, Vijay KS, Teoh HL, and Anil G
- Subjects
- Humans, Retrospective Studies, Arteries, Intracranial Thrombosis surgery, Venous Thrombosis surgery
- Abstract
The role of mechanical thrombectomy (MT) in cerebral venous sinus thrombosis (CVT) is ambiguous. This study aims to share our experience with MT in CVT, supplemented by a meta-analysis on this treatment. All patients who had MT for CVT at our institution, between 2016 and 2021, were retrospectively reviewed for treatment indications, the technique used, success and complication rates, and clinical outcomes. A meta-analysis was performed for clinical and safety outcomes from published literature with > 10 patients. A total of 15 patients were included in this study. All had a venous hemorrhage or deteriorating despite anticoagulation. MT was performed using aspiration (with wide bore catheters) in 7 patients: aspiration with stent retriever in 5 and transjugular Fogarty-balloon thrombectomy in 3 patients. Adjunctive intra-sinus thrombolysis (IST) was used in 4 cases and venoplasty in 3. Technical success (restoring antegrade venous flow on arterial injection) was 100% with no procedure-related major complication. The direct transjugular approach was cheaper and faster. At 3-month follow-up, 86% of patients had good outcomes (MRS < 2). Meta-analysis of clinical and safety outcomes from 22 and 20 studies, respectively, demonstrated a positive association between MT and good outcomes as well as no significant association with hazardous periprocedural events. EVT via mechanical means for CVT is feasible in our series and meta-analysis. From our experience, trans-jugular Fogarty balloon embolectomy seems to be a potential cost-saving option, at least in a certain part of the world., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
- Published
- 2023
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30. Deoxyglucose-conjugated persistent luminescent nanoparticles for theragnostic application in fibrosarcoma tumor model.
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Sharma KS, Melwani PK, Yadav HD, Joshi R, Shetake NG, Dubey AK, Singh BP, Phapale S, Phadnis PP, Vatsa RK, Ningthoujam RS, and Pandey BN
- Abstract
Deoxyglucose conjugated nanoparticles with persistent luminescence have shown theragnostic potential. In this study, deoxyglucose-conjugated nano-particles with persistent luminescence properties were synthesized, and their theragnostic potential was evaluated in fibrosarcoma cancer cells and a tumor model. The uptake of nano-formulation was found to be higher in mouse fibrosarcoma (WEHI-164) cells cultured in a medium without glucose. Nanoparticles showed a higher killing ability for cancer cells compared to normal cells. A significant accumulation of nanoparticles to the tumor site in mice was evident by the increased tumor/normal leg ratio, resulting in a significant decrease in tumor volume and weight. Histopathological studies showed a significant decrease in the number of dividing mitotic cells but a greater number of apoptotic/necrotic cells in nanoparticle-treated tumor tissues, which was correlated with a lower magnitude of Ki-67 expression (a proliferation marker). Consequently, our results showed the potential of our nano-formulation for cancer theragnosis., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)
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- 2023
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31. Regioselective C(sp 2 )-H imidation of arenes by redox neutral visible-light photocatalysis.
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Ghosh MK, Sharma KS, and Pandey G
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- Molecular Structure, Catalysis, Oxidation-Reduction, Light, Imides
- Abstract
We report herein a redox neutral visible light-induced regioselective C(sp
2 )-H imidation of electron-rich arenes and heteroarenes using conceptually designed redox-active 1 as a source of the N-centered imidyl radical. Structurally diverse aromatic imides were obtained in moderate to good yields. This methodology has been successfully employed for the late stage imidation of complex molecules and has also been applied towards the formal total synthesis of the marine natural products carpatamides A, B and D. It has further been shown that the generated imides can easily be converted to the corresponding anilines in situ directly.- Published
- 2023
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32. Artificial Intelligence Assisted Fabrication of 3D, 4D and 5D Printed Formulations or Devices for Drug Delivery.
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Sharma KS
- Subjects
- Pharmaceutical Preparations, Drug Delivery Systems, Precision Medicine, Artificial Intelligence, Printing, Three-Dimensional
- Abstract
5D & 4D printings are an advanced version of 3D printing class and are one of the most revolutionary and powerful fabrication methods used for preparing innovative structures and solid substances using precise additive manufacturing technology. It captures the imagination of one with its potential to produce flexible designing and fabrication of innovative products with high complexity and speed. This technology with the assistance of AI (Artificial Intelligence) facilitates real-time sensing, adapting to change, and predicting the state of printing. 3D printing works by employing advanced materials utilizing a computer aided design with tomography scan under AI control which deposits printing material in accordance with the nature of a file usually in STL format, but it requires time for printing. This shortcoming can be overcome by 4D printing where smart materials are incorporated with time as 4th dimension. This technique has self-repair and self-assembly properties that will save around 80% of time. Some printed materials are made sensitive to temperature, humidity, light, and other parameters so that they can respond to stimulus, but it's one limitation of not being able to print complex shapes having curved surfaces can be overcome by utilising 5D printing where additive manufacturing is done by rotation of extruder head and rotation of print bed to print in 5 different axes. This review evaluates the prospective of these techniques with AI interference in medicine and pharmacy, with its effective and efficient production for the required design precision., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2023
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33. COVID-19: Consequences on pregnant women and neonates.
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Sharma KS, Sharma R, Nehra S, Rajpurohit NA, Bhakar K, and Kumar D
- Abstract
Introduction: Human species is confronting with a gigantic global COVID-19 pandemic. Initially, it was observed in Wuhan, China, and the COVID-19 cases spread across the globe with lightning speed and resulted in the 21st century pandemic. If scientific reports are taken care of, it is noteworthy that this virus possesses more specific characteristics due to its structure. The distinctive structure has a higher binding affinity with angiotensin-converting enzyme 2 (ACE2) protein, and this is used as an access point to gain access to hosts., Methods: A complete literature search was conducted using PubMed, Google Scholar, SciFinder, and deep-diving Google Search using keywords such as "Pregnancy, COVID-19, Newborn, Fetus, Coronavirus 2019, Neonate, Pregnant women, and vertical transmission"., Result and Discussion: The SARS-CoV-2 virus is unlike its former analogs: SARS-CoV, and MERS-CoV in 2002 and 2012, respectively, or anything mankind has faced earlier concerning viciousness, global spread, and gravity of a causative agent. The current review has delved into articles published in various journals worldwide including the latest studies on the impact of COVID-19 on pregnant women and neonates and has discussed complications and challenges, psychological health, immunological response, vertical transmission, concurrent disorders, vaccine debate, management recommendations, recent news of the approval of COVID-19 vaccine for 6 months and older babies, and future perspectives., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2022 The Author(s). Published by Elsevier Ltd.)
- Published
- 2022
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34. A natural outbreak of infectious spleen and kidney necrosis virus threatens wild pearlspot, Etroplus suratensis in Peechi Dam in the Western Ghats biodiversity hotspot, India.
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Swaminathan TR, Johny TK, Nithianantham SR, Sudhagar A, Pradhan PK, Sulumane Ramachandra KS, Nair RR, and Sood N
- Subjects
- Animals, Biodiversity, Capsid Proteins genetics, Disease Outbreaks veterinary, Phylogeny, Cichlids, DNA Virus Infections veterinary, Drinking Water, Fish Diseases, Iridoviridae
- Abstract
A large-scale mortality of pearlspot, Etroplus suratensis was reported from Peechi Dam, an artificial tropical lake made for irrigation and drinking water supply in Kerala, India during 2018. This dam is located in the premises of Western Ghats, recognized as one of the biodiversity hotspots of the world. The objective of this study was to identify the aetiological agent of this large-scale mortality of E. suratensis by systematic diagnostic investigation and identification of the pathogen. Virus isolation was carried out on a species-specific pearlspot fin (PSF) cell line. Infected PSF cells showed cytopathic effects (CPEs) like cell shrinkage, rounding, enlargement, clustering, and subsequent detachment of cells with a high viral titre of 10
6⋅95 TCID50 ml-1 at 8 days post-inoculation (dpi). Histopathological examination of the fish showed the presence of numerous abnormal enlarged basophilic cells and intracytoplasmic eosinophilic inclusions in the liver. Moreover, transmission electron microscopy (TEM) analysis revealed the presence of large numbers of 125-132 nm viral particles in the spleen tissues. PCR amplification and phylogenetic analysis of the major capsid protein (MCP) gene sequence confirmed that the causative agent was infectious spleen and kidney necrosis virus (ISKNV) of the genus Megalocytivirus. The experimental infection recorded 86.7 ± 2.7% mortality in the E. suratensis (body weight 11.01 ± 2.7 g; body length 8.01 ± 2.23 cm) injected with 1 × 104⋅25 TCID50 ml-1 ISKNV per fish. Our detailed investigation provided definitive diagnosis of ISKNV in the severe mass mortality event in wild E. suratensis in Peechi Dam, India, adding one more species to expanding host range of ISKNV infection. The high mortality rate of ISKNV infection in pearlspot suggests the perilous nature of this disease, particularly among the wild fish population., (© 2022 Wiley-VCH GmbH.)- Published
- 2022
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35. Multimodal Applications of Zinc Gallate-Based Persistent Luminescent Nanoparticles in Cancer Treatment: Tumor Margining, Diagnosis, and Boron Neutron Capture Therapy.
- Author
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Sharma KS, Raju M S, Phapale S, Valvi SK, Dubey AK, Goswami D, Ray D, De A, Phadnis PP, Aswal VK, Vatsa R, and Sarma HD
- Subjects
- Animals, Luminescence, Mice, Mice, Inbred C57BL, Zinc, Boron Neutron Capture Therapy, Melanoma, Nanoparticles
- Abstract
On the basis of the boron neutron capture therapy (BNCT) modality, we have designed and synthesized a zinc gallate (ZnGa
2 O4 )-based nanoformulation for developing an innovative theranostic approach for cancer treatment. Initially, the (ZnGa1.995 Cr0.005 O4 or ZnGa2 O4 :(0.5%)Cr persistent luminescence nanoparticles (PLNPs) embedded on silica matrix were synthesized. Their surface functionalization was performed using organic synthesis strategies to attach the amine functional moieties which were further coupled with poly(vicinal diol). These diols were helpful for conjugation with10 B(OH)3 , which subsequently served to couple with an in-house-synthesized variant of pH-(low)-insertion peptide (pHLIP) finally giving a tumor-targeting nanoformulation. Most importantly, the polymeric diols helped in conjugation of a substantial number of10 B to provide the therapeutic dose required for effective BNCT. This nanoformulation internalized substantially (∼80%) to WEHI-164 cancer cells within 6 h. Tumor homing studies indicated that the accumulation of this formulation at the acidic tumor site was within 2 h. The in vitro evaluation of the formulation against WEHI-164 cancer cells followed by neutron irradiation revealed its potent cytotoxicity with IC50 ∼ 25 μM. In the case of studies on animal models, the melanoma-induced C57BL/6 and fibrosarcoma-induced BALB/c mice were treated with formulations through intratumoral and intravenous injections, respectively, followed by neutron irradiation, leading to a significant killing of the cancer cells, which was evidenced by a reduction in tumor volume (75-80%) as compared with a control tumor. Furthermore, the histopathological studies confirmed a damaging effect only on tumor cells, while there was no sign of damage to the vital organs in treated mice as well as in controls.- Published
- 2022
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36. Improved Limit on Tensor Currents in the Weak Interaction from ^{8}Li β Decay.
- Author
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Burkey MT, Savard G, Gallant AT, Scielzo ND, Clark JA, Hirsh TY, Varriano L, Sargsyan GH, Launey KD, Brodeur M, Burdette DP, Heckmaier E, Joerres K, Klimes JW, Kolos K, Laminack A, Leach KG, Levand AF, Longfellow B, Maaß B, Marley ST, Morgan GE, Mueller P, Orford R, Padgett SW, Pérez Galván A, Pierce JR, Ray D, Segel R, Siegl K, Sharma KS, and Wang BS
- Abstract
The electroweak interaction in the standard model is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this Letter, we present the most precise measurement of tensor currents in the low-energy regime by examining the β-ν[over ¯] correlation of trapped ^{8}Li ions with the Beta-decay Paul Trap. We find a_{βν}=-0.3325±0.0013_{stat}±0.0019_{syst} at 1σ for the case of coupling to right-handed neutrinos (C_{T}=-C_{T}^{'}), which is consistent with the standard model prediction.
- Published
- 2022
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37. Apprehension and Stress Associated with Covid-19 Pandemic - A Population Based Study.
- Author
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Sabir H, Nahid Y, and Arvind KS
- Abstract
Introduction: Public health outbreak due to communicable diseases may cause apprehension and fear in the population. Coronavirus disease (COVID-19) is one of the worst pandemics the world has seen in recent years, which might have caused apprehension and mental stress. It is prudent to explore the psychological implications associated with this highly infectious disease. However, there is a dearth in the literature regarding the nature and magnitude of psychological impact in the Indian population. Hence, the present study was conducted to assess the apprehension, fear and perceived stress related to the COVID-19 in the adult population. Methods: We conducted a descriptive cross-sectional semi-structured questionnaire-based study. A total of 295 adults from different parts of India completed the online questionnaire. Psychological impact was assessed using two reliable and validated scales: the Fear of COVID-19 scale (FCV-19) and Perceived Stress Scale (PSS-10). The psychological impact was compared between respondents with positive and negative history of COVID-19 infection. Results: The mean score for fear of COVID-19 was 20.28 (SD=5.536) in participants with a positive history of SARS-CoV-2 infection and 18.33 (SD=5.302) in COVID negative individuals, with a p value of 0.006. However, the mean value for the perceived stress score was 19.17 (SD=6.264) and 18.26 (SD=5.826) for COVID positive and negative participants, respectively. Female subjects had significantly higher fear than their male counterparts. Participants who were relatively younger and those with a positive history of SARS-CoV-2 infection in their family were found to have a significantly higher perceived stress. Conclusion: The present study highlighted complex relationships between fear, stress and COVID-19. The COVID-19 pandemic was associated with fear and stress among women and relatively younger adults who participated in the study. So, along with older population, psychological support should also be provided to younger adults during the times of pandemic. This should be taken into account in programs aimed at preventing and alleviating the psychological impact.
- Published
- 2022
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38. Mesoporous Silica-Coated Upconversion Nanoparticles Assisted Photodynamic Therapy Using 5-Aminolevulinic Acid: Mechanistic and In Vivo Studies.
- Author
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Sharma KS, Dubey AK, Kumar C, Phadnis PP, Sudarsan V, and Vatsa RK
- Subjects
- Aminolevulinic Acid pharmacology, Animals, Mice, Mice, SCID, Photosensitizing Agents pharmacology, Reactive Oxygen Species metabolism, Silicon Dioxide, Nanoparticles, Neoplasms drug therapy, Photochemotherapy
- Abstract
Exclusively red-emitting upconversion nanoparticles (UCNPs) with the composition NaErF
4 :0.5%Tm as a core and NaYF4 as a shell were synthesized for performing photodynamic therapy (PDT). A possible mechanism was proposed for core-shell UCNPs formation. For loading a maximum amount of 5-aminolevulinic acid (5-ALA), mesoporous silica coating was performed on UCNPs. Studies under dark conditions confirmed the biocompatibility of 5-ALA-loaded UCNPs formulation (UCNPs-5-ALA) with MCF-7 cells. Meanwhile, studies under light-exposed conditions exhibited effective cytotoxicity against MCF-7 cells. Studies employing D2 O-based cell cultured media and addition of DABCO in cell culture established that the cell death was due to oxidation of cellular components by reactive oxygen species (ROS) triggering the apoptosis. The formation of ROS was confirmed by DCF( H )DA-based ROS analysis via fluorescence microscopy to demonstrate the ROS production, which mediates the programmed cell death. Additionally, we have validated the apoptosis in MCF-7 cells with flow cytometry analyses. This was further confirmed by an electrophoretic mobility shift assay on nuclear extract and measurement of mitochondrial membrane potential. In the case of animal model studies, the formulation UCNPs-5-ALA without irradiation (980 nm) did not possess any in vivo cytotoxicity on tumor-induced SCID mice and there was a minimum migration of UCNPs-5-ALA to the vital organs but maximum retention at the tumor site only. Meanwhile, only the mice treated with UCNPs-5-ALA and irradiated on the tumor region with 980 nm laser (500 mW) for 20 min possessed a tumor with a size reduced to about 75% as compared with the corresponding control groups. To the best of our knowledge, this type of study was conducted for the first time employing exclusively red-emitting phosphors for effective PDT.- Published
- 2022
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39. Simultaneous detection of aqueous aluminum(III) and chromium(III) using Persea americana reduced and capped silver nanoparticles.
- Author
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Kumari S, Sharma KS, Nemiwal M, Khan S, and Kumar D
- Subjects
- Aluminum, Biodegradation, Environmental, Chromium, Ions, Plant Extracts chemistry, Silver chemistry, Water chemistry, Metal Nanoparticles chemistry, Persea
- Abstract
There is a significant interest to develop sensing devices that detect water toxins, especially heavy metal ions. Although there have already been numerical reports on detecting toxic heavy metal ions, the use of adaptable devices could enable a broader range of sensing applications. Here, we used fresh peel extract (PeA) and dried peel extract (DPeA) of Persea americana (Avocado) as a reducing and capping agent to synthesize and stabilize AgNPs. The dimensions of NPs were controlled by tuning pH, temperature, and volume of the reducing agent. The sensitivity and selectivity of the AgNPs toward various metal ions viz. Ni(II), Cd(II), Al(III), Hg(II), Cr(III), Ba(II), Pb(II), Zn(II), Co(II), Mn(II), Cu(II), Ca(II), Mg(II), and K(I) were studied. The detection probe was found to be selective and sensitive toward Al(III) and Cr(III) ions with the detection limit of 0.04 ppm and 0.05 ppm, respectively. High-resolution transmission electron microscope (HRTEM), ultraviolet-visible (UV-Vis) spectroscopy, and dynamic light scattering (DLS) analysis results confirm an agglomeration-based mechanism for sensing both metal ions. This method can be exploited for the colorimetric detection of toxic heavy metals in real water samples.
- Published
- 2022
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40. Co-infection of Lactococcus garvieae and Tilapia lake virus (TiLV) in Nile tilapia Oreochromis niloticus cultured in India.
- Author
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Swaminathan TR, Nithyanantham SR, Narendrakumar L, Dharmaratnam A, Sood N, Pradhan PK, Sulumane Ramachandra KS, and Lal KK
- Subjects
- Animals, Lactococcus, Cichlids, Coinfection veterinary, Fish Diseases epidemiology, Tilapia
- Abstract
Tilapia lake virus (TiLV) and Lactococcus garvieae are 2 major pathogens of cultured Nile tilapia Oreochromis niloticus. In June-July 2018, a disease outbreak was reported in Nile tilapia cultured in brackish water floating cages in Kerala, India. Affected fish died gradually, and cumulative mortality reached ~75% within 1 mo. In the present study, TiLV and L. garvieae were isolated from the infected fish and confirmed. Nucleotide analysis of the partial sequence of segment 3 revealed that the present TiLV isolate showed 100% similarity with TiLV MF574205 and 97.65% similarity with TiLV KU552135 isolated in Israel. The partial 16S rDNA nucleotide sequence of L. garvieae shared 99% similarity with the 16S rDNA nucleotide sequence of L. garvieae isolated from Nile tilapia in Brazil. Eight virulence genes (hly1, hly2, hly3, NADH oxidase, adhPav, LPxTG-1, LPxTG-4, adhC1) were amplified in the present isolate. In the experimental challenge study, the onset of mortality started earlier in fish co-infected with TiLV and L. garvieae (3 d post-infection [dpi]) compared to other groups. Cumulative mortality (90% at 12 dpi) was significantly higher in the co-infected group than in fish infected with TiLV (60% at 12 dpi) and L. garvieae (40% at 12 dpi) alone. This study reveals that synergistic co-infection with TiLV and other bacteria may increase mortality in disease outbreaks. To the best of our knowledge, this is the first reported co-infection of L. garvieae with TiLV associated with mass mortality in Nile tilapia in India.
- Published
- 2021
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41. Synthesis and Characterization of N -Isopropylacrylamide Microspheres as pH Sensors.
- Author
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Lavine BK, Kaval N, Oxenford L, Kim M, Dahal KS, Perera N, Seitz R, Moulton JT, and Bunce RA
- Subjects
- Acrylamides, Hydrogen-Ion Concentration, Microspheres, Hydrogels, Polymers
- Abstract
Swellable polymer microspheres that respond to pH were prepared by free radical dispersion polymerization using N -isopropylacrylamide (NIPA), N , N
' -methylenebisacrylamide (MBA), 2,2-dimethoxy-2-phenylacetylphenone, N -tert-butylacrylamide (NTBA), and a pH-sensitive functional comonomer (acrylic acid, methacrylic acid, ethacrylic acid, or propacrylic acid). The diameter of the microspheres was between 0.5 and 1.0 μm. These microspheres were cast into hydrogel membranes prepared by mixing the pH-sensitive swellable polymer particles with aqueous polyvinyl alcohol (PVA) solutions followed by crosslinking with glutaric dialdehyde for use as pH sensors. Large changes in the turbidity of the PVA membrane were observed as the pH of the buffer solution in contact with the membrane was varied. These changes were monitored by UV-visible absorbance spectroscopy. Polymer swelling of many NIPA copolymers was reversible and independent of the ionic strength of the buffer solution in contact with the membrane. Both the degree of swelling and the apparent pKa of the polymer microspheres increased with temperature. Furthermore, the apparent pKa of the polymer particles could be tuned to respond sharply to pH in a broad range (pH 4.0-7.0) by varying the amount of crosslinker (MBA) and transition temperature modifier (NTBA), and the amount, pKa , and hydrophobicity of the pH-sensitive functional comonomer (alkyl acrylic acid) used in the formulation. Potential applications of these polymer particles include fiber optic pH sensing where the pH-sensitive material can be immobilized on the distol end of an optical fiber.- Published
- 2021
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42. Rosai-Dorfman disease in 6-year-old child: Presentation, diagnosis, and treatment.
- Author
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Giri K, Baral A, Tiwari N, and Sharma KS
- Abstract
Rosai-Dorfman disease is referred to as sinus histiocytosis massive lymphadenopathy. We are reporting a rare case of Rosai-Dorfman disease, a case of 6-year-old boy with a history of multiple painless submandibular and cervical lymphadenopathy., Competing Interests: All other authors declare that they have no competing interests concerning the content published in this manuscript., (© 2021 The Authors. Clinical Case Reports published by John Wiley & Sons Ltd.)
- Published
- 2021
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43. Facile Synthesis of a Pt(IV) Prodrug of Cisplatin and Its Intrinsically 195m Pt Labeled Analog: A Step Closer to Cancer Theranostic.
- Author
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Sharma KS, Vimalnath KV, Phadnis PP, Chakravarty R, Chakraborty S, Dash A, and Vatsa RK
- Abstract
Background Aims and Objectives: Cisplatin is extensively used in chemotherapy for treatment of a broad range of cancers. But its undesired side reactions with biomolecules that lead to severe side effects especially on kidney and nervous system, are limiting its clinical utility. To reduce its side effects, the kinetically inert Pt(IV) prodrug was recognized as an alternative approach from satisfactory results of preliminary experiments. But, its approval as anticancer drug for clinical use requires detailed investigations of its anticancer action and pharmacological pathways by employing its analogue which can be traced by a suitable technique. As a step closer towards translation of Pt(IV)-based prodrug from research to clinical level, a protocol for efficient synthesis of
195m Pt-radiolabeled Pt(IV) prodrug was devised., Materials and Methods: In order to achieve the aim, we started synthesis from elemental platinum avoiding lengthy steps. The synthesis protocol was standardized on its cold analogue, as [PtCl2 (NH3 )2 (OCOCH2 CH2 COOH)2 ] which has been characterized with nuclear magnetic resonance (1 H,13 C{1H} and195 Pt{1H}) spectroscopy, microanalyses and cyclic voltammetry. Also, cytotoxicity of [PtCl2 (OCOCH2 CH2 COOH)2 (NH3 )2 ] was evaluated against MCF-7 human breast cancer cell lines using cisplatin as test control., Results: Intrinsically,195m Pt-labeled analogue of prodrug was obtained with high radionuclidic and radiochemical purity. It was confirmed by chromatography and γ-ray spectrometry., Conclusion: The195m Pt-radiolabeled prodrug was synthesized in a facile manner. It can be utilized in evaluating the mechanism of anticancer action and pharmacokinetics by enabling synergistic use of molecular imaging and targeted drug delivery., Competing Interests: There are no conflicts of interest., (Copyright: © 2021 Indian Journal of Nuclear Medicine.)- Published
- 2021
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44. Rapid single cell evaluation of human disease and disorder targets using REVEAL: SingleCell™.
- Author
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Kumar N, Golhar R, Sharma KS, Holloway JL, Sarangi S, Neuhaus I, Walsh AM, and Pitluk ZW
- Subjects
- Angiotensin-Converting Enzyme 2 metabolism, COVID-19 epidemiology, COVID-19 virology, Cells, Cultured, Databases, Genetic, Epidemics, Gene Expression Profiling, Humans, Receptors, Virus metabolism, SARS-CoV-2 metabolism, SARS-CoV-2 physiology, Virus Internalization, Angiotensin-Converting Enzyme 2 genetics, COVID-19 prevention & control, Receptors, Virus genetics, SARS-CoV-2 genetics, Serine Endopeptidases genetics, Single-Cell Analysis methods
- Abstract
Background: Single-cell (sc) sequencing performs unbiased profiling of individual cells and enables evaluation of less prevalent cellular populations, often missed using bulk sequencing. However, the scale and the complexity of the sc datasets poses a great challenge in its utility and this problem is further exacerbated when working with larger datasets typically generated by consortium efforts. As the scale of single cell datasets continues to increase exponentially, there is an unmet technological need to develop database platforms that can evaluate key biological hypotheses by querying extensive single-cell datasets. Large single-cell datasets like Human Cell Atlas and COVID-19 cell atlas (collection of annotated sc datasets from various human organs) are excellent resources for profiling target genes involved in human diseases and disorders ranging from oncology, auto-immunity, as well as infectious diseases like COVID-19 caused by SARS-CoV-2 virus. SARS-CoV-2 infections have led to a worldwide pandemic with massive loss of lives, infections exceeding 7 million cases. The virus uses ACE2 and TMPRSS2 as key viral entry associated proteins expressed in human cells for infections. Evaluating the expression profile of key genes in large single-cell datasets can facilitate testing for diagnostics, therapeutics, and vaccine targets, as the world struggles to cope with the on-going spread of COVID-19 infections., Main Body: In this manuscript we describe REVEAL: SingleCell, which enables storage, retrieval, and rapid query of single-cell datasets inclusive of millions of cells. The array native database described here enables selecting and analyzing cells across multiple studies. Cells can be selected using individual metadata tags, more complex hierarchical ontology filtering, and gene expression threshold ranges, including co-expression of multiple genes. The tags on selected cells can be further evaluated for testing biological hypotheses. One such example includes identifying the most prevalent cell type annotation tag on returned cells. We used REVEAL: SingleCell to evaluate the expression of key SARS-CoV-2 entry associated genes, and queried the current database (2.2 Million cells, 32 projects) to obtain the results in < 60 s. We highlighted cells expressing COVID-19 associated genes are expressed on multiple tissue types, thus in part explains the multi-organ involvement in infected patients observed worldwide during the on-going COVID-19 pandemic., Conclusion: In this paper, we introduce the REVEAL: SingleCell database that addresses immediate needs for SARS-CoV-2 research and has the potential to be used more broadly for many precision medicine applications. We used the REVEAL: SingleCell database as a reference to ask questions relevant to drug development and precision medicine regarding cell type and co-expression for genes that encode proteins necessary for SARS-CoV-2 to enter and reproduce in cells.
- Published
- 2021
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45. Anti-Inflammatory Activity of Human Lens Crystallin Derived Peptide.
- Author
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Muralidharan A, Tender T, Shetty PK, Mutalik S, K KS, and Hariharapura RC
- Subjects
- Animals, Anti-Inflammatory Agents pharmacology, Diclofenac, Humans, Peptides, Rats, Rats, Wistar, Crystallins
- Abstract
Background: Inflammation has become the culmination point for several chronic diseases like skin diseases, asthma, neurological disorders, cancer, and cardiovascular disorders. Mini αA-crystallin peptide, identified from a highly conserved region of human lens protein αA-crystallin, is known to have a chaperone-like function; hence, it has generated interest in exploring the anti-inflammatory potential of the peptide., Objective: The objective of the study was to evaluate the anti-inflammatory potential of mini αA chaperones using in vitro, ex-vivo, and in vivo models., Methods: The peptide was tested for its phosphodiestarase4 B inhibition, anti-inflammatory and free radical scavenging abilities in HaCaT cells. Carbopol gel formulations with varying concentrations of mini αA-crystallin peptide and diclofenac sodium were prepared and optimized. Skin permeation studies of prepared formulations were carried out on excised abdominal skin of Wistar rat using a vertical type diffusion cell. Carrageenan induced rat paw oedema model was used for determining the anti-inflammatory potential of the peptide in prepared gel formulation with or without diclofenac sodium., Results: The peptide exhibited appreciable free radical scavenging and weak PDE4B inhibition. Gel formulation with 1% Tween-80, 1% carbopol, and 10% ethanol showed better permeation compared to other formulations. The in vitro skin permeation studies revealed good improvement in permeation characteristics of diclofenac and peptide from the gels. The peptide was retained within the skin tissue, which is an ideal requirement for the delivery of an anti-inflammatory topical formulation. In preclinical anti-inflammatory studies, gel formulation containing mini αA-peptide and diclofenac sodium showed a significant decrease in paw volume compared to other combinations tested., Conclusion: The study revealed the additive effect in anti-inflammatory activity by combining mini-αA peptide and diclofenac sodium which effectively reduced the inflammation., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2021
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46. Evaluation and validation of Physiological and Operative Severity Score for the enumeration of mortality and morbidity and Portsmouth-POSSUM scores in predicting morbidity and mortality in patients undergoing head and neck cancer surgeries.
- Author
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Karan N, Siddiqui S, Sharma KS, Pantvaidya GH, Divatia JV, and Kulkarni AP
- Subjects
- Humans, Morbidity, Postoperative Complications epidemiology, Retrospective Studies, Risk Assessment, Risk Factors, Severity of Illness Index, Head and Neck Neoplasms surgery
- Abstract
Background: Identification of risk factors for perioperative complications helps in the prognostication. We wanted to determine whether Physiological and Operative Severity Score for the enumeration of mortality and morbidity (POSSUM) and Portsmouth-POSSUM (P-POSSUM) can be used in patients undergoing head and neck oncosurgery., Methods: We conducted a retrospective analysis of 1265 patients after they had major head and neck oncosurgeries. Demographic, surgical and outcome data was collected. We separately analyzed data for patients who had undergone cancer surgery for oral cavity, pharynx, and larynx. We calculated the POSSUM and P-POSSUM scores., Results: POSSUM scoring system had moderate discrimination (AUC = 0.61) and good calibration (P = .36) for the entire study cohort and in the subgroup. Since there were no deaths in the entire cohort, we were not able to check predictive ability of the scores, for mortality., Conclusions: We found that POSSUM had moderate discrimination and good calibration for morbidity prediction in head and neck cancer surgeries, as well as for the selected subgroup., (© 2020 Wiley Periodicals LLC.)
- Published
- 2020
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47. Synchronous thoracic and head-and-neck malignancies-double trouble-challenges, pitfalls, and lessons learnt.
- Author
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Sood KS, Himthani M, Tanwar A, and Perumal SL
- Subjects
- Breast Neoplasms radiotherapy, Esophageal Neoplasms radiotherapy, Female, Humans, Male, Neoplasms, Multiple Primary radiotherapy, Prognosis, Tongue Neoplasms radiotherapy, Tonsillar Neoplasms radiotherapy, Breast Neoplasms pathology, Carcinoma, Squamous Cell pathology, Esophageal Neoplasms pathology, Neoplasms, Multiple Primary pathology, Tongue Neoplasms pathology, Tonsillar Neoplasms pathology
- Abstract
Synchronous malignancies arising from head and neck and thorax are rare presentation, and only few cases are reported in the scientific literature. We report three cases of double primary malignancies treated at our hospital., Competing Interests: None
- Published
- 2020
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48. Pro-neuronal activity of Myod1 due to promiscuous binding to neuronal genes.
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Lee QY, Mall M, Chanda S, Zhou B, Sharma KS, Schaukowitch K, Adrian-Segarra JM, Grieder SD, Kareta MS, Wapinski OL, Ang CE, Li R, Südhof TC, Chang HY, and Wernig M
- Subjects
- Animals, Basic Helix-Loop-Helix Transcription Factors metabolism, Binding Sites, Cell Lineage genetics, Cellular Reprogramming, Chromatin chemistry, Chromatin metabolism, Embryo, Mammalian, Fibroblasts cytology, Mice, Mice, Inbred C57BL, Mice, Transgenic, MyoD Protein metabolism, Nerve Tissue Proteins metabolism, Neurons cytology, Nucleotide Motifs, Protein Binding, Signal Transduction, Transcription Factors metabolism, Transcription, Genetic, Basic Helix-Loop-Helix Transcription Factors genetics, Fibroblasts metabolism, Gene Expression Regulation, Developmental, MyoD Protein genetics, Nerve Tissue Proteins genetics, Neurons metabolism, Transcription Factors genetics
- Abstract
The on-target pioneer factors Ascl1 and Myod1 are sequence-related but induce two developmentally unrelated lineages-that is, neuronal and muscle identities, respectively. It is unclear how these two basic helix-loop-helix (bHLH) factors mediate such fundamentally different outcomes. The chromatin binding of Ascl1 and Myod1 was surprisingly similar in fibroblasts, yet their transcriptional outputs were drastically different. We found that quantitative binding differences explained differential chromatin remodelling and gene activation. Although strong Ascl1 binding was exclusively associated with bHLH motifs, strong Myod1-binding sites were co-enriched with non-bHLH motifs, possibly explaining why Ascl1 is less context dependent. Finally, we observed that promiscuous binding of Myod1 to neuronal targets results in neuronal reprogramming when the muscle program is inhibited by Myt1l. Our findings suggest that chromatin access of on-target pioneer factors is primarily driven by the protein-DNA interaction, unlike ordinary context-dependent transcription factors, and that promiscuous transcription factor binding requires specific silencing mechanisms to ensure lineage fidelity.
- Published
- 2020
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49. Ewing Sarcoma in Nepal Treated With Combined Chemotherapy and Definitive Radiotherapy.
- Author
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Jha AK, Neupane P, Pradhan M, Sharma KS, Shrestha S, Sigdel PR, Smeland S, and Bruland ØS
- Subjects
- Adolescent, Adult, Child, Female, Humans, Male, Nepal, Prospective Studies, Young Adult, Sarcoma, Ewing drug therapy, Sarcoma, Ewing radiotherapy
- Abstract
Purpose: To our knowledge, we conducted the first prospective oncologic clinical trial in Nepal aimed at providing state-of-the-art chemotherapy to patients with Ewing sarcoma. The efficacy of external-beam radiotherapy (RT) as the sole local treatment modality was explored and deemed justified as a result of the lack of available advanced tumor-orthopedic services in Nepal., Patients and Methods: Twenty patients, 11 female and 9 male patients between the ages of 6 and 37 years, with newly diagnosed Ewing sarcoma were enrolled. Neoadjuvant combination chemotherapy, comprising well-established drug combinations, was administered in five courses before external-beam RT, during which one course of etoposide and ifosfamide was given. After RT, six additional chemotherapy courses were scheduled., Results: RT was tolerated well, providing rapid symptom relief and local tumor control, with no pathologic fractures observed among the 15 patients who received such treatment. Eleven patients completed the entire treatment protocol; seven patients were under continued follow-up, with no evidence of disease in six patients at a median follow-up time of 2.3 years (range, 1.3 to 3.1 years) and one patient alive but with a regional recurrence. Four patients experienced metastatic relapse and died as a result of their disease. Three treatment-related deaths linked to toxicity from chemotherapy occurred. Four of the six patients who refused to complete the treatment protocol and were lost to follow-up experienced progressive disease and were assumed dead., Conclusion: This study was feasible with RT as the sole local treatment modality in combination with chemotherapy. As a result of the high number of patients lost to follow-up, no firm conclusions can be drawn, but the majority of the patients who completed treatment obtained durable long-term remissions.
- Published
- 2019
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50. Analysis of gentisic acid and related renal cell carcinoma biomarkers using reversed-phase liquid chromatography with water-rich mobile phases.
- Author
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Dahal KS, Gamagedara S, Nuwan Perera UD, and Lavine BK
- Abstract
The problem of longer retention times using water-rich mobile phases in reversed phase liquid chromatography (RPLC) has been addressed using hydrophobic alcohols such as butanol in very low quantities (approximately 0.1%) as the organic modifier. Advantages of water-rich mobile phases in RPLC for the separation of water-soluble and weakly retained compounds are improved separation of congeners and better tuning of RPLC separations. This is demonstrated in the separation of gentisic acid and related renal cell carcinoma (RCC) biomarkers in urine with a Zorbax C
18 column and a mobile phase of 0.1% (volume/volume) butanol in water with 0.6% (volume/volume) acetic acid. Calibration curves for the RCC biomarkers were linear over the concentration range investigated (5 ppm to 1000 ppm). Detection limits for the RCC biomarkers were 0.85ppm (quinolinic acid), 1.75ppm (gentisic acid), and 1.25ppm (4-hydroxybenzoic acid). Recovery tests using synthetic urine samples containing 20 ppm, 100 ppm, and 700 pm of each RCC biomarker were successful for all compounds.- Published
- 2019
- Full Text
- View/download PDF
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