Subarna Roy

Mr. Subarna Roy

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Research Focus & Metrics

Academic Career Length

23Years (2004-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 April 2023 in PLOS ONE
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Journal Article
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BGBronwen Gillespie
Bronwen Gillespie
GKGeetanjali Katageri
Geetanjali Katageri
SSShumona Sharmin Salam
Shumona Sharmin Salam
URUmesh Ramadurg
Umesh Ramadurg
SPShrinivas Patil
Shrinivas Patil
DADilly OC Anumba
Dilly OC Anumba
Between 1990 and 2016 the number of adolescents with anemia world-wide increased by 20% to almost one in four. Iron deficiency in adolescence results in compromised growth, decreased cognitive function, and depressed immune function, and can increase the risk of negative outcomes in pregnancy, especially in the case of young adolescents. In India, despite several decades of governmental investment in anemia prevention and treatment, more than half of women of reproductive age are anemic, with rates even higher in the adolescent population. Although awareness of adolescence as a nutrition-sensitive developmental stage is increasing, there is a lack of qualitative research on the perspectives of adolescents and families on anemia and related services. In this study, we explored the issues influencing adolescents’ awareness of anemia in three rural areas of Karnataka. Sixty-four in-depth interviews and six focus group discussions were conducted with adolescents (those who had never been pregnant, pregnant adolescents, and young mothers), community members, and nutrition-related service providers in the health and education sectors. An inductive analytical approach was used. We found that adolescent girls, particularly those who have not experienced pregnancy or motherhood, had very low awareness of anemia. State programs including school-based distribution of iron and folic acid supplements and nutrition talks were not seen to be resulting in knowledge and acceptance of the importance of preventing anemia. Pregnancy represents a turning point in which adolescents are systematically tested for anemia as part of routine antenatal care, increasing their awareness of, and access to, treatment for the condition. At the same time, pregnancy represents to family and community a period to insist on a nutritious diet. For progress in anemia reduction to be made, improved age-appropriate measures specific for adolescence are required. Improving school-based nutrition outreach is an important opportunity to reach adolescents.

6 January 2022 in Computers in Biology and Medicine
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Journal Article
Closed access
PDPrarambh S.R. Dwivedi
Prarambh S.R. Dwivedi
VPVishal S. Patil
Vishal S. Patil
PKPukar Khanal
Pukar Khanal
VBVishwambhar V. Bhandare
Vishwambhar V. Bhandare
Shailendra Shivaji GuravShailendra Shivaji Gurav
Shailendra Shivaji Gurav
SRSubarna Roy
Subarna Roy

22 January 2023 in Molecules
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Journal Article
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SDSanjay Deshpande
Sanjay Deshpande
AMAbdullatif Bin Muhsinah
Abdullatif Bin Muhsinah
ZBZabin K. Bagewadi
Zabin K. Bagewadi
GAGireesh M Ankad
Gireesh M Ankad
MMMater H. Mahnashi
Mater H. Mahnashi
SRSubarna Roy
Subarna Roy
Cancer is characterized by the abnormal development of cells that divide in an uncontrolled manner and further take over the body and destroy the normal cells of the body. Although several therapies are practiced, the demand and need for new therapeutic agents are ever-increasing because of issues with the safety, efficacy and efficiency of old drugs. Several plant-based therapeutics are being used for treatment, either as conjugates with existing drugs or as standalone formulations. Withania somnifera (L.) Dunal is a highly studied medicinal plant which is known to possess immunomodulatory activity as well as anticancer properties. The pivotal role of KAT6A in major cellular pathways and its oncogenic nature make it an important target in cancer treatment. Based on the literature and curated datasets, twenty-six compounds from the root of W. somnifera and a standard inhibitor were docked with the target KAT6A using Autodock vina. The compounds and the inhibitor complexes were subjected to molecular dynamics simulation (50 ns) using Desmond to understand the stability and interactions. The top compounds (based on the docking score of less than −8.5 kcal/mol) were evaluated in comparison to the inhibitor. Based on interactions at ARG655, LEU686, GLN760, ARG660, LEU689 and LYS763 amino acids with the inhibitor WM-8014, the compounds from W. somnifera were evaluated. Withanolide D, Withasomniferol C, Withanolide E, 27-Hydroxywithanone, Withanolide G, Withasomniferol B and Sitoindoside IX showed high stability with the residues of interest. The cell viability of human breast cancer MCF-7 cells was evaluated by treating them with W. Somnifera root extract using an MTT assay, which showed inhibitory activity with an IC50 value of 45 µg/mL. The data from the study support the traditional practice of W. somnifera as an anticancer herb.

9 October 2020 in BMC Infectious Diseases
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SGSidhartha Giri
Sidhartha Giri
CKCP Girish Kumar
CP Girish Kumar
SKShainey Alokit Khakha
Shainey Alokit Khakha
MSMamta Chawla Sarkar
Mamta Chawla Sarkar
GVGopalkrishna Varanasi
Gopalkrishna Varanasi
GKGagandeep Kang
Gagandeep Kang
Background: From 2016, the Government of India introduced the oral rotavirus vaccine into the national immunization schedule. Currently, two indigenously developed vaccines (ROTAVAC, Bharat Biotech; ROTASIIL, Serum Institute of India) are included in the Indian immunization program. We report the rotavirus disease burden and the diversity of rotavirus genotypes from 2005 to 2016 in a multi-centric surveillance study before the introduction of vaccines. Methods: A total of 29,561 stool samples collected from 2005 to 2016 (7 sites during 2005–2009, 3 sites from 2009 to 2012, and 28 sites during 2012–2016) were included in the analysis. Stools were tested for rotavirus antigen using enzyme immunoassay (EIA). Genotyping was performed on 65.8% of the EIA positive samples using reverse transcription- polymerase chain reaction (RT-PCR) to identify the G (VP7) and P (VP4) types. Multinomial logistic regression was used to quantify the odds of detecting genotypes across the surveillance period and in particular age groups. Results: Of the 29,561 samples tested, 10,959 (37.1%) were positive for rotavirus. There was a peak in rotavirus positivity during December to February across all sites. Of the 7215 genotyped samples, G1P[8] (38.7%) was the most common, followed by G2P[4] (12.3%), G9P[4] (5.8%), G12P[6] (4.2%), G9P[8] (4%), and G12P[8] (2.4%). Globally, G9P[4] and G12P[6] are less common genotypes, although these genotypes have been reported from India and few other countries. There was a variation in the geographic and temporal distribution of genotypes, and the emergence or re-emergence of new genotypes such as G3P[8] was seen. Over the surveillance period, there was a decline in the proportion of G2P[4], and an increase in the proportion of G9P[4]. A higher proportion of mixed and partially typed/untyped samples was also seen more in the age group 0–11 months. Conclusions: This 11 years surveillance highlights the high burden of severe rotavirus gastroenteritis in Indian children < 5 years of age before inclusion of rotavirus vaccines in the national programme. Regional variations in rotavirus epidemiology were seen, including the emergence of G3P[8] in the latter part of the surveillance. Having pre-introduction data is important to track changing epidemiology of rotaviruses, particularly following vaccine introduction.

31 May 2022 in Antioxidants
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PPPriyanka P. Patil
Priyanka P. Patil
PKPukar Khanal
Pukar Khanal
VPVishal S. Patil
Vishal S. Patil
RCRajitha Charla
Rajitha Charla
Darasaguppe R. HarishDarasaguppe R. Harish
Darasaguppe R. Harish
SRSubarna Roy
Subarna Roy
Background and objective: Doxorubicin is a widely used chemotherapeutic agent that causes oxidative stress leading to cardiotoxicity, hepatotoxicity, and nephrotoxicity. In contrast, Theobroma cacao L. has been recorded as an anticancer agent and found to be protective against multiple chemical-induced organ injuries, including heart, liver, and kidney injuries. The present study investigated the possible role of extracts from T. cacao beans for organ-protective effects in doxorubicin-induced toxicity in mice bearing Ehrlich ascites carcinoma (EAC). Methodology: After survival analysis in rodents, cocoa bean extract (COE) was investigated for its efficacy against EAC-induced carcinoma and its organ-protective effect against doxorubicin-treated mice with EAC-induced carcinoma. Results: Significant reductions in EAC and doxorubicin-induced alterations were observed in mice administered the COE, either alone or in combination with doxorubicin. Furthermore, COE treatment significantly increased the mouse survival time, life span percentage, and antioxidant defense system. It also significantly improved cardiac, hepatic, and renal function biomarkers and markers for oxidative stress, and it also reduced doxorubicin-induced histopathological changes. Conclusion: COE acted against doxorubicin-induced organ toxicity; potent antioxidant and anticancer activities were also reflected by the COE itself. The COE may therefore serve as an adjuvant nutraceutical in cancer chemotherapy.

5 February 2022 in Molecules
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Journal Article
Open access
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VPVishal S. Patil
Vishal S. Patil
Darasaguppe R. HarishDarasaguppe R. Harish
Darasaguppe R. Harish
UVUmashankar Vetrivel
Umashankar Vetrivel
SRSubarna Roy
Subarna Roy
SDSanjay Deshpande
Sanjay Deshpande
HHHarsha V. Hegde
Harsha V. Hegde
Terminalia chebula Retz. forms a key component of traditional folk medicine and is also reported to possess antihepatitis C virus (HCV) and immunomodulatory activities. However, information on the intermolecular interactions of phytochemicals from this plant with HCV and human proteins are yet to be established. Thus, by this current study, we investigated the HCV NS3/4A inhibitory and host immune-modulatory activity of phytocompounds from T. chebula through in silico strategies involving network pharmacology and structural bioinformatics techniques. To start with, the phytochemical dataset of T. chebula was curated from biological databases and the published literature. Further, the target ability of the phytocompounds was predicted using BindingDB for both HCV NS3/4A and other probable host targets involved in the immune system. Further, the identified targets were docked to the phytochemical dataset using AutoDock Vina executed through the POAP pipeline. The resultant docked complexes with significant binding energy were subjected to 50 ns molecular dynamics (MD) simulation in order to infer the stability of complex formation. During network pharmacology analysis, the gene set pathway enrichment of host targets was performed using the STRING and Reactome pathway databases. Further, the biological network among compounds, proteins, and pathways was constructed using Cytoscape 3.6.1. Furthermore, the druglikeness, side effects, and toxicity of the phytocompounds were also predicted using the MolSoft, ADVERpred, and PreADMET methods, respectively. Out of 41 selected compounds, 10 were predicted to target HCV NS3/4A and also to possess druglike and nontoxic properties. Among these 10 molecules, Chebulagic acid and 1,2,3,4,6-Pentagalloyl glucose exhibited potent HCV NS3/4A inhibitory activity, as these scored a lowest binding energy (BE) of −8.6 kcal/mol and −7.7 kcal/mol with 11 and 20 intermolecular interactions with active site residues, respectively. These findings are highly comparable with Asunaprevir (known inhibitor of HCV NS3/4A), which scored a BE of −7.4 kcal/mol with 20 key intermolecular interactions. MD studies also strongly suggest that chebulagic acid and 1,2,3,4,6-Pentagalloyl glucose as promising leads, as these molecules showed stable binding during 50 ns of production run. Further, the gene set enrichment and network analysis of 18 protein targets prioritized 10 compounds and were predicted to potentially modulate the host immune system, hemostasis, cytokine levels, interleukins signaling pathways, and platelet aggregation. On overall analysis, this present study predicts that tannins from T. chebula have a potential HCV NS3/4A inhibitory and host immune-modulatory activity. However, further experimental studies are required to confirm the efficacies.