74 results on '"Om Prakash Dwivedi"'
Search Results
2. Genome-wide mRNA profiling in urinary extracellular vesicles reveals stress gene signature for diabetic kidney disease
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Om Prakash Dwivedi, Karina Barreiro, Annemari Käräjämäki, Erkka Valo, Anil K. Giri, Rashmi B. Prasad, Rishi Das Roy, Lena M. Thorn, Antti Rannikko, Harry Holthöfer, Kim M. Gooding, Steven Sourbron, Denis Delic, Maria F. Gomez, Per-Henrik Groop, Tiinamaija Tuomi, Carol Forsblom, Leif Groop, and Maija Puhka
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Medicine ,Clinical finding ,Disease ,Specimen ,Biopsy sample ,Science - Abstract
Summary: Urinary extracellular vesicles (uEV) are a largely unexplored source of kidney-derived mRNAs with potential to serve as a liquid kidney biopsy. We assessed ∼200 uEV mRNA samples from clinical studies by genome-wide sequencing to discover mechanisms and candidate biomarkers of diabetic kidney disease (DKD) in Type 1 diabetes (T1D) with replication in Type 1 and 2 diabetes. Sequencing reproducibly showed >10,000 mRNAs with similarity to kidney transcriptome. T1D DKD groups showed 13 upregulated genes prevalently expressed in proximal tubules, correlated with hyperglycemia and involved in cellular/oxidative stress homeostasis. We used six of them (GPX3, NOX4, MSRB, MSRA, HRSP12, and CRYAB) to construct a transcriptional “stress score” that reflected long-term decline of kidney function and could even identify normoalbuminuric individuals showing early decline. We thus provide workflow and web resource for studying uEV transcriptomes in clinical urine samples and stress-linked DKD markers as potential early non-invasive biomarkers or drug targets.
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- 2023
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3. Urinary extracellular vesicles: Assessment of pre‐analytical variables and development of a quality control with focus on transcriptomic biomarker research
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Karina Barreiro, Om Prakash Dwivedi, Sami Valkonen, Per‐Henrik Groop, Tiinamaija Tuomi, Harry Holthofer, Antti Rannikko, Marjo Yliperttula, Pia Siljander, Saara Laitinen, Elina Serkkola, Taija af Hällström, Carol Forsblom, Leif Groop, and Maija Puhka
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biomarkers ,DNAse ,microRNA ,mRNA ,storage temperature ,storage time ,Cytology ,QH573-671 - Abstract
Abstract Urinary extracellular vesicles (uEV) are a topical source of non‐invasive biomarkers for health and diseases of the urogenital system. However, several challenges have become evident in the standardization of uEV pipelines from collection of urine to biomarker analysis. Here, we studied the effect of pre‐analytical variables and developed means of quality control for uEV isolates to be used in transcriptomic biomarker research. We included urine samples from healthy controls and individuals with type 1 or type 2 diabetes and normo‐, micro‐ or macroalbuminuria and isolated uEV by ultracentrifugation. We studied the effect of storage temperature (‐20°C vs. ‐80°C), time (up to 4 years) and storage format (urine or isolated uEV) on quality of uEV by nanoparticle tracking analysis, electron microscopy, Western blotting and qPCR. Urinary EV RNA was compared in terms of quantity, quality, and by mRNA or miRNA sequencing. To study the stability of miRNA levels in samples isolated by different methods, we created and tested a list of miRNAs commonly enriched in uEV isolates. uEV and their transcriptome were preserved in urine or as isolated uEV even after long‐term storage at ‐80°C. However, storage at ‐20°C degraded particularly the GC‐rich part of the transcriptome and EV protein markers. Transcriptome was preserved in RNA samples extracted with and without DNAse, but read distributions still showed some differences in e.g. intergenic and intronic reads. MiRNAs commonly enriched in uEV isolates were stable and concordant between different EV isolation methods. Analysis of never frozen uEV helped to identify surface characteristics of particles by EM. In addition to uEV, qPCR assays demonstrated that uEV isolates commonly contained polyoma viruses. Based on our results, we present recommendations how to store and handle uEV isolates for transcriptomics studies that may help to expedite standardization of the EV biomarker field.
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- 2021
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4. Genetic inactivation of ANGPTL4 improves glucose homeostasis and is associated with reduced risk of diabetes
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Viktoria Gusarova, Colm O’Dushlaine, Tanya M. Teslovich, Peter N. Benotti, Tooraj Mirshahi, Omri Gottesman, Cristopher V. Van Hout, Michael F. Murray, Anubha Mahajan, Jonas B. Nielsen, Lars Fritsche, Anders Berg Wulff, Daniel F. Gudbjartsson, Marketa Sjögren, Connor A. Emdin, Robert A. Scott, Wen-Jane Lee, Aeron Small, Lydia C. Kwee, Om Prakash Dwivedi, Rashmi B. Prasad, Shannon Bruse, Alexander E. Lopez, John Penn, Anthony Marcketta, Joseph B. Leader, Christopher D. Still, H. Lester Kirchner, Uyenlinh L. Mirshahi, Amr H. Wardeh, Cassandra M. Hartle, Lukas Habegger, Samantha N. Fetterolf, Teresa Tusie-Luna, Andrew P. Morris, Hilma Holm, Valgerdur Steinthorsdottir, Patrick Sulem, Unnur Thorsteinsdottir, Jerome I. Rotter, Lee-Ming Chuang, Scott Damrauer, David Birtwell, Chad M. Brummett, Amit V. Khera, Pradeep Natarajan, Marju Orho-Melander, Jason Flannick, Luca A. Lotta, Cristen J. Willer, Oddgeir L. Holmen, Marylyn D. Ritchie, David H. Ledbetter, Andrew J. Murphy, Ingrid B. Borecki, Jeffrey G. Reid, John D. Overton, Ola Hansson, Leif Groop, Svati H. Shah, William E. Kraus, Daniel J. Rader, Yii-Der I. Chen, Kristian Hveem, Nicholas J. Wareham, Sekar Kathiresan, Olle Melander, Kari Stefansson, Børge G. Nordestgaard, Anne Tybjærg-Hansen, Goncalo R. Abecasis, David Altshuler, Jose C. Florez, Michael Boehnke, Mark I. McCarthy, George D. Yancopoulos, David J. Carey, Alan R. Shuldiner, Aris Baras, Frederick E. Dewey, and Jesper Gromada
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Science - Abstract
Genetic variation in ANGPTL4 is associated with lipid traits. Here, the authors find that predicted loss-of-function variants in ANGPTL4 are associated with glucose homeostasis and reduced risk of type 2 diabetes and that Angptl4 −/− mice on a high-fat diet show improved insulin sensitivity.
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- 2018
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5. Common variants of FTO are associated with childhood obesity in a cross-sectional study of 3,126 urban Indian children.
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Om Prakash Dwivedi, Rubina Tabassum, Ganesh Chauhan, Saurabh Ghosh, Raman K Marwaha, Nikhil Tandon, and Dwaipayan Bharadwaj
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Medicine ,Science - Abstract
FTO variants are robustly associated with obesity and related traits in many population and shown to have variable impact during life course. Although studies have shown association of FTO variants with adiposity in adult Indian, its association in Indian children is yet to be confirmed.Here we examined association of FTO variants (rs9939609 and rs8050136) with obesity and related anthropometric and biochemical traits in 3,126 Indian children (aged 11-17 years) including 2,230 normal-weight and 896 over-weight/obese children. We also compared effects observed in the present study with that observed in previous studies on South Asian adults and children of other ethnic groups.The variant rs9939609 showed significant association with risk of obesity [OR = 1.21, P = 2.5 × 10(-3)] and its measures BMI, weight, waist circumference and hip circumference [β range = 0.11 to 0.14 Z-score units; P range = 1.3 × 10(-4) to 1.6 × 10(-7)] in children. The observed effect sizes in Indian children were similar to those reported for European children. Variant rs9939609 explained 0.88% of BMI variance in Indian children. The effect sizes of rs9939609 on BMI and WC were ~2 fold higher in children than adults. Interestingly rs9939609 was also associated with serum levels of thyroid stimulating hormone (TSH) [β = 0.10 Z-score, P = 5.8 × 10(-3)]. The other variant rs8050136 was in strong linkage disequilibrium with rs9939609 (r(2) = 0.97) and provided similar association results.The study provides first report of association of FTO variants with obesity and related anthropometric traits in Indian children with higher impact in children compared to adults. We also demonstrated association of FTO variant with serum levels of TSH, indicating putative influence of FTO in hypothalamic-pituitary-thyroid axis.
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- 2012
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6. Genetic variant of AMD1 is associated with obesity in urban Indian children.
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Rubina Tabassum, Alok Jaiswal, Ganesh Chauhan, Om Prakash Dwivedi, Saurabh Ghosh, Raman K Marwaha, Nikhil Tandon, and Dwaipayan Bharadwaj
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Medicine ,Science - Abstract
Hyperhomocysteinemia is regarded as a risk factor for cardiovascular diseases, diabetes and obesity. Manifestation of these chronic metabolic disorders starts in early life marked by increase in body mass index (BMI). We hypothesized that perturbations in homocysteine metabolism in early life could be a link between childhood obesity and adult metabolic disorders. Thus here we investigated association of common variants from homocysteine metabolism pathway genes with obesity in 3,168 urban Indian children.We genotyped 90 common variants from 18 genes in 1,325 children comprising of 862 normal-weight (NW) and 463 over-weight/obese (OW/OB) children in stage 1. The top signal obtained was replicated in an independent sample set of 1843 children (1,399 NW and 444 OW/OB) in stage 2. Stage 1 association analysis revealed association between seven variants and childhood obesity at P
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- 2012
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7. Common variants in CRP and LEPR influence high sensitivity C-reactive protein levels in North Indians.
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Anubha Mahajan, Rubina Tabassum, Sreenivas Chavali, Om Prakash Dwivedi, Ganesh Chauhan, Saurabh Ghosh, Nikhil Tandon, and Dwaipayan Bharadwaj
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Medicine ,Science - Abstract
BackgroundHigh sensitivity C-reactive protein (hsCRP) levels are shown to be influenced by genetic variants in Europeans; however, little is explored in Indian population.MethodsHerein, we comprehensively evaluated association of all previously reported genetic determinants of hsCRP levels, including 18 cis (proximal to CRP gene) and 73 trans-acting (distal to CRP gene) variants in 4,200 North Indians of Indo-European ethnicity. First, we evaluated association of 91 variants from 12 candidate loci with hsCRP levels in 2,115 North Indians (1,042 non-diabetic subjects and 1,073 patients with type 2 diabetes). Then, cis and trans-acting variants contributing maximally to hsCRP level variation were further replicated in an independent 2,085 North Indians (1,047 patients with type 2 diabetes and 1,038 non-diabetic subjects).ResultsWe found association of 12 variants from CRP, LEPR, IL1A, IL6, and IL6R with hsCRP levels in non-diabetic subjects. However, only rs3093059-CRP [β = 0.33, P = 9.6×10⁻⁵] and the haplotype harboring rs3093059 risk allele [β = 0.32 µg/mL, P = 1.4×10⁻⁴/P(perm) = 9.0×10⁻⁴] retained significance after correcting for multiple testing. The cis-acting variant rs3093059-CRP had maximum contribution to the variance in hsCRP levels (1.14%). Among, trans-acting variants, rs1892534-LEPR was observed to contribute maximally to hsCRP level variance (0.59%). Associations of rs3093059-CRP and rs1892534-LEPR were confirmed by replication and attained higher significance after meta-analysis [β(meta) = 0.26/0.22; P(meta) = 4.3×10⁻⁷/7.4×10⁻³ and β(meta) = -0.15/-0.12; P(meta) = 2.0×10⁻⁶/1.6×10⁻⁶ for rs3093059 and rs1892534, respectively in non-diabetic subjects and all subjects taken together].ConclusionIn conclusion, we identified rs3093059 in CRP and rs1892534 in LEPR as major cis and trans-acting contributor respectively, to the variance in hsCRP levels in North Indian population.
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- 2011
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8. Bioprecarity, Disposability, and the Poetics of Hope in Swarga
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Om Prakash Dwivedi
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General Arts and Humanities ,General Social Sciences - Abstract
This article conceptualizes the everyday existential crisis of man, nature, including the planetary life as bioprecarity. It looks at the neoliberal capitalist economy that renders bios precarious. The bios incudes humans, more-than-humans, and natural resources in the Global South, available for value-generation of a select few. The article argues that disposability of bios triggers and expands neoliberal economy, thus turning entire life forms on the planet precarious. This horrendous task of erasing life-sustaining conditions and strengthening value-generation process can be abundantly found in Ambikasutan Mangad’s novel, Swarga (2017), which narrates the precarious man-nature relationship as a result of the extractive forces of neoliberalism. In the last section of the article, I turn to Phillip E Wegner’s conceptualization of “close-critical reading” paradigm as a poetics of hope in these dark times, thus highlighting how hope nourishes the fight of Enmakaje people against the capital-state complex.
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- 2022
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9. Introduction: Partition — 75 Years On
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Om Prakash Dwivedi, Kamran Asdar Ali, and Tabish Khair
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Literature and Literary Theory - Published
- 2022
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10. Global crisis management and higher education: Agency and coupling in the context of wicked <scp>COVID</scp> ‐19 problems
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Anatoly Oleksiyenko, Pilar Mendoza, Fredy Esteban Cárdenas Riaño, Om Prakash Dwivedi, Arif H. Kabir, Aliya Kuzhabekova, Muweesi Charles, Vutha Ros, and Ielyzaveta Shchepetylnykova
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Education - Published
- 2022
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11. Capturing the Kidney Transcriptome by Urinary Extracellular Vesicles—From Pre-Analytical Obstacles to Biomarker Research
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Puhka, Karina Barreiro, Om Prakash Dwivedi, Antti Rannikko, Harry Holthöfer, Tiinamaija Tuomi, Per-Henrik Groop, and Maija
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urinary extracellular vesicles ,exosomes ,urine ,diabetic kidney disease ,reference genes ,miRNA ,mRNA ,sequencing - Abstract
Urinary extracellular vesicles (uEV) hold non-invasive RNA biomarkers for genitourinary tract diseases. However, missing knowledge about reference genes and effects of preanalytical choices hinder biomarker studies. We aimed to assess how preanalytical variables (urine storage temperature, isolation workflow) affect diabetic kidney disease (DKD)—linked miRNAs or kidney—linked miRNAs and mRNAs (kidney-RNAs) in uEV isolates and to discover stable reference mRNAs across diverse uEV datasets. We studied nine raw and normalized sequencing datasets including healthy controls and individuals with prostate cancer or type 1 diabetes with or without albuminuria. We focused on kidney-RNAs reviewing literature for DKD-linked miRNAs from kidney tissue, cell culture and uEV/urine experiments. RNAs were analyzed by expression heatmaps, hierarchical clustering and selecting stable mRNAs with normalized counts (>200) and minimal coefficient of variation. Kidney-RNAs were decreased after urine storage at −20 °C vs. −80 °C. Isolation workflows captured kidney-RNAs with different efficiencies. Ultracentrifugation captured DKD -linked miRNAs that separated healthy and diabetic macroalbuminuria groups. Eleven mRNAs were stably expressed across the datasets. Hence, pre-analytical choices had variable effects on kidney-RNAs—analyzing kidney-RNAs complemented global correlation, which could fade differences in some relevant RNAs. Replicating prior DKD-marker results and discovery of candidate reference mRNAs encourages further uEV biomarker studies.
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- 2023
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12. Capturing the Kidney Transcriptome by Urinary Extracellular Vesicles – from Preanalytical Obstacles to Biomarker Research
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Karina Barreiro, Om Prakash Dwivedi, Antti Rannikko, Harry Holthofer, Tiinamaija Tuomi, Per-Henrik Groop, and Maija Puhka
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Urinary extracellular vesicles (uEV) hold non-invasive RNA biomarkers for genitourinary tract diseases. However, missing knowledge about reference genes and effects of pre-analytical choices hinder biomarker studies. We aimed to assess how pre-analytical variables (urine storage temperature, isolation workflow) affect diabetic kidney disease (DKD) -linked miRNAs or kidney -linked miRNAs and mRNAs (kidney-RNAs) in uEV isolates and to discover stable reference mRNAs across diverse uEV datasets. We studied nine raw and normalized sequencing datasets including healthy controls and individuals with prostate cancer or type 1 diabetes with or without albuminuria. We focused on kidney-RNAs reviewing literature for DKD-linked miRNAs from kidney tissue, cell culture and uEV/urine experiments. RNAs were analyzed by expression heatmaps, hierarchical clustering and selecting stable mRNAs with normalized counts (>200) and minimal coefficient of variation. Kidney-RNAs were decreased after urine storage at -20°C vs -80°C. Isolation workflows captured kidney-RNAs with different efficiencies. Ultracentrifugation captured DKD -linked miRNAs that separated healthy and diabetic macroalbuminuria groups. Eleven mRNAs were stably expressed across the datasets. Hence, preanalytical choices had variable effects on kidney-RNAs – analyzing kidney-RNAs complemented global correlation, which could fade differences in some relevant RNAs. Replicating prior DKD-marker results and discovery of candidate reference mRNAs encourages further uEV biomarker studies.
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- 2023
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13. Writing Feminist Hermeneutics through Liminality: A Reading of Tahmima Anam’s A Golden Age
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Om Prakash Dwivedi
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Gender Studies ,General Arts and Humanities ,General Social Sciences - Published
- 2022
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14. Genome-wide association analyses highlight etiological differences underlying newly defined subtypes of diabetes
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Annemari Käräjämäki, Rashmi B. Prasad, Jose C. Florez, Leif Groop, Anubha Mahajan, Ola Hansson, Rebecka Hjort, Tiinamaija Tuomi, Olle Melander, Om Prakash Dwivedi, Mikael Åkerlund, Dina Mansour Aly, Manonanthini Thangam, Emma Ahlqvist, Miriam S. Udler, Julia Brosnan, Mark I. McCarthy, and Sofia Carlsson
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Genetics ,fungi ,Genome-wide association study ,Locus (genetics) ,Type 2 diabetes ,Biology ,medicine.disease ,Genetic architecture ,Diabetes mellitus ,medicine ,SNP ,Family history ,TCF7L2 - Abstract
Type 2 diabetes has been reproducibly clustered into five subtypes with different disease progression and risk of complications; however, etiological differences are unknown. We used genome-wide association and genetic risk score (GRS) analysis to compare the underlying genetic drivers. Individuals from the Swedish ANDIS (All New Diabetics In Scania) study were compared to individuals without diabetes; the Finnish DIREVA (Diabetes register in Vasa) and Botnia studies were used for replication. We show that subtypes differ with regard to family history of diabetes and association with GRS for diabetes-related traits. The severe insulin-resistant subtype was uniquely associated with GRS for fasting insulin but not with variants in the TCF7L2 locus or GRS reflecting insulin secretion. Further, an SNP (rs10824307) near LRMDA was uniquely associated with mild obesity-related diabetes. Therefore, we conclude that the subtypes have partially distinct genetic backgrounds indicating etiological differences. Genome-wide association and genetic risk score analyses highlight differences in genetic architecture across five subtypes of diabetes.
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- 2021
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15. Stereotyped Epistemology: Post-Millennial Indian Writing in English
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Om Prakash Dwivedi
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General Medicine ,Psychology ,Epistemology - Published
- 2021
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16. Planetary precarity and the pandemic
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Om Prakash Dwivedi, Janet M Wilson, and Cristina M. Gámez-Fernández
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History ,Precarity ,Literature and Literary Theory ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,0602 languages and literature ,05 social sciences ,Pandemic ,0507 social and economic geography ,Economic history ,06 humanities and the arts ,060202 literary studies ,050701 cultural studies - Abstract
As this special issue of the Journal of Postcolonial Writing goes to print, fear of the life-changing and life-taking SARS-CoV-2 virus spreads worldwide faster than the virus itself. The volume’s v...
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- 2020
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17. Slums and Urbanization of Poverty in Postcolonial India
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Om Prakash Dwivedi
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- 2022
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18. Ecoprogramming the Vulnerable Bodies
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Om Prakash Dwivedi
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- 2022
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19. Living in dystopia: Fractured identities and COVID-19
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Om Prakash Dwivedi and Aleks Wansbrough
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Coronavirus ,Literature and Literary Theory ,COVID-19 - Published
- 2022
20. Introduction
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Om Prakash Dwivedi
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- 2022
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21. Ecocritical Explorations of the Climate Crisis : Planetary Precarity and Future Habitability
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Janet M. Wilson, Barbara Schmidt-Haberkamp, Om Prakash Dwivedi, Janet M. Wilson, Barbara Schmidt-Haberkamp, and Om Prakash Dwivedi
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- Colonization--Social aspects, Postcolonialism, Environmental degradation--Political aspects, Colonization--Environmental aspects, Ecocriticism, Climatic changes, Postcolonialism in literature, Environmentalism in literature
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Ecocritical Explorations of the Climate Crisis expands postcolonial precarity studies by addressing the current climate crisis and threats to the habitability of the planet from a range of ecocritical and environmental perspectives. The collection uses planetary thought-action praxis that acknowledges the interconnectedness of all forms of life in addressing the socioecological issues facing humanity: accelerating climate change, over-exploitation of natural resources, and the Global North–South divide. With reference to contemporary cultural productions, such praxis seeks to examine the ideas, images, and narratives that either represent or impede potential disasters like the so-called sixth extinction of the planet, that inspire the dismantling of carbon democracies arising in the wake of neoliberalism, and that address rising inequality with precarious conditions in the transition to renewable energy. The different chapters explore literary and visual representations of planetary precarity, identifying crisis-responsive genres and cultural formats, and assessing approaches to environment-re/making that call for repair, recovery and sustainability. In imagining future habitability, they deploy diverse critical frameworks such as queer utopias, zero-waste lifestyles, alternative ecologies, and adaptations to the uninhabitable. The collection tackles problems of global vulnerability and examines precarity as a condition of resilience and resistance through collective actions and solidarities and innovative constructions of the planet's survival as a shared home. It engages with current postcolonial debates, uses intersectional methodologies, and introduces contemporary literary, visual concepts, and narrative types.
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- 2025
22. Urine extracellular vesicles capture kidney transcriptome and hyperglycemia linked mRNA signatures for type 1 diabetic kidney disease
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Carol Forsblom, Rashmi B. Prasad, Harry Holthöfer, Tiinamaija Tuomi, Erkka Valo, Per-Henrik Groop, Karina Barreiro, Maija Puhka, Om Prakash Dwivedi, Annemari Käräjämäki, and Leif Groop
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0303 health sciences ,Kidney ,medicine.medical_specialty ,Urinary system ,Renal function ,Biology ,Transcriptome ,03 medical and health sciences ,0302 clinical medicine ,MRNA Sequencing ,medicine.anatomical_structure ,Endocrinology ,Downregulation and upregulation ,030220 oncology & carcinogenesis ,Internal medicine ,Gene expression ,Albuminuria ,medicine ,medicine.symptom ,030304 developmental biology - Abstract
Diabetic kidney disease (DKD) is a severe complication of type 1 diabetes (T1D), which lacks non-invasive early biomarkers. Although less explored, mRNAs in urinary extracellular vesicles (uEV) could reflect changes in the kidney transcriptome during DKD development. We performed genome-wide mRNA sequencing of >100 uEV samples from two T1D cohorts with 24-hour and overnight urine collections. Our uEV pipeline allowed reproducible detection of >10,000 mRNAs bearing overall similarity to kidney transcriptome. uEV from T1D DKD groups showed significant upregulation of 13 genes, prevalently expressed by proximal tubular cells within the kidney. Strikingly, six genes involved in cellular stress responses including protection against oxidative stress (GPX3, NOX4, MSRB, MSRA, HRSP12 and CRYAB) correlated with hyperglycemia and long-term changes in kidney function independent of albuminuria status. The study identified genes associated with glycemic stress in T1D DKD and confirmed the utility of uEV in capturing pathological gene expression signatures from kidney.
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- 2021
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23. Urinary extracellular vesicles: Assessment of pre‐analytical variables and development of a quality control with focus on transcriptomic biomarker research
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Antti Rannikko, Carol Forsblom, Sami Valkonen, Pia Siljander, Marjo Yliperttula, Harry Holthöfer, Om Prakash Dwivedi, Saara Laitinen, Tiinamaija Tuomi, Leif Groop, Per-Henrik Groop, Taija af Hällström, Elina Serkkola, Maija Puhka, Karina Barreiro, Institute for Molecular Medicine Finland, Division of Pharmaceutical Biosciences, Biopharmaceutics Group, Molecular and Integrative Biosciences Research Programme, Drug Research Program, HUS Abdominal Center, Doctoral Programme in Clinical Research, Research Programs Unit, Department of Medicine, Per Henrik Groop / Principal Investigator, Clinicum, Nefrologian yksikkö, CAMM - Research Program for Clinical and Molecular Metabolism, Centre of Excellence in Complex Disease Genetics, Tiinamaija Tuomi Research Group, Endokrinologian yksikkö, Urologian yksikkö, Department of Surgery, Research Program in Systems Oncology, Extracellular Vesicles, Leif Groop Research Group, and University Management
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Adult ,Quality Control ,Histology ,storage time ,mRNA ,Nanoparticle tracking analysis ,virus ,Biology ,MIRNA ,Transcriptome ,NORMALIZATION ,03 medical and health sciences ,transcriptomics ,Extracellular Vesicles ,0302 clinical medicine ,microRNA ,Diabetes Mellitus ,Humans ,Biomarker Analysis ,urinary extracellular vesicles ,Research Articles ,030304 developmental biology ,EXOSOMES ,0303 health sciences ,Messenger RNA ,QH573-671 ,RNA ,biomarkers ,Cell Biology ,3. Good health ,Blot ,DNAse ,Biochemistry ,storage temperature ,030220 oncology & carcinogenesis ,Case-Control Studies ,Biomarker (medicine) ,1182 Biochemistry, cell and molecular biology ,3111 Biomedicine ,Cytology ,urinary exosomes ,STORAGE ,Research Article - Abstract
Urinary extracellular vesicles (uEV) are a topical source of non-invasive biomarkers for health and diseases of the urogenital system. However, several challenges have become evident in the standardization of uEV pipelines from collection of urine to biomarker analysis. Here, we studied the effect of pre-analytical variables and developed means of quality control for uEV isolates to be used in transcriptomic biomarker research. We included urine samples from healthy controls and individuals with type 1 or type 2 diabetes and normo-, micro- or macroalbuminuria and isolated uEV by ultracentrifugation. We studied the effect of storage temperature (-20 degrees C vs. -80 degrees C), time (up to 4 years) and storage format (urine or isolated uEV) on quality of uEV by nanoparticle tracking analysis, electron microscopy, Western blotting and qPCR. Urinary EV RNA was compared in terms of quantity, quality, and by mRNA or miRNA sequencing. To study the stability of miRNA levels in samples isolated by different methods, we created and tested a list of miRNAs commonly enriched in uEV isolates. uEV and their transcriptome were preserved in urine or as isolated uEV even after long-term storage at -80 degrees C. However, storage at -20 degrees C degraded particularly the GC-rich part of the transcriptome and EV protein markers. Transcriptome was preserved in RNA samples extracted with and without DNAse, but read distributions still showed some differences in e.g. intergenic and intronic reads. MiRNAs commonly enriched in uEV isolates were stable and concordant between different EV isolation methods. Analysis of never frozen uEV helped to identify surface characteristics of particles by EM. In addition to uEV, qPCR assays demonstrated that uEV isolates commonly contained polyoma viruses. Based on our results, we present recommendations how to store and handle uEV isolates for transcriptomics studies that may help to expedite standardization of the EV biomarker field.
- Published
- 2021
24. Un tiempo de oscuridad: El proyecto anticolonial de Satyajit Ray
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Om Prakash Dwivedi and Binayak Roy
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Reino unido ,Betrayal ,media_common.quotation_subject ,Power relations ,orientalismo ,General Materials Science ,Art ,sistema feudal ,imperio ,Humanities ,hambruna en Bengala ,media_common - Abstract
Satyajit Ray’s films are enriched with ideological concerns and engage with the issues of colonialism and the crisis of nationhood. His post 1970 films present an artist’s anguished response to the betrayal of the Nehruvian dream and to the anachronism of his own cherished values. It was also in this period that Ray turned to India’s colonial past and critiqued the dynamics of power relations. This essay studies how Shatranj ke Khilari (The Chess Players, 1980) assesses the reasons for colonization of India and its culture by the Britishers and how, in Ashani Sanket (Distant Thunder, 1973), he criticized the Raj, the mercenaries and the complexities in Indian society where he denounces the Bengal Famine of former times. Las películas de Satyajit Ray muestran su perfil ideológico e interpelan a las temáticas del colonialismo y la crisis de nacionalidad. Las películas que dirigió después de 1970 muestran la respuesta ansiosa que suponía la traición a los valores de Nehru y el anacronismo de los valores que Ray consideraba necesarios. En este período Ray también investigó el pasado colonial de India y denunció la dinámica de las relaciones de poder que existieron. Este ensayo estudia cómo Shatranj ke Khilari (Los jugadores de ajedrez, 1980) evalúa las razones culturales por las que India fue colonizada por Reino Unido y, en Ashani Sanket (Trueno distante, 1973), critica el Raj, los que cometieron crímenes despiadados y las complejidades de la sociedad india de la época, arremetiendo especialmente contra las condiciones que desencadenaros la Hambruna en Bengala.
- Published
- 2021
25. Comparison of urinary extracellular vesicle isolation methods for transcriptomic biomarker research in diabetic kidney disease
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Denis Delic, Om Prakash Dwivedi, German Leparc, Marcel Rolser, Karina Barreiro, Harry Holthöfer, Maija Puhka, Carol Forsblom, Tobias B. Huber, Leif Groop, Per-Henrik Groop, Institute for Molecular Medicine Finland, University of Helsinki, Research Programs Unit, HUS Abdominal Center, Nefrologian yksikkö, CAMM - Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, Department of Medicine, Clinicum, Helsinki University Hospital Area, and Centre of Excellence in Complex Disease Genetics
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Adult ,Male ,0301 basic medicine ,Histology ,mRNA sequencing ,exosomes ,Biology ,Transcriptome ,Extracellular Vesicles ,03 medical and health sciences ,0302 clinical medicine ,miRNA sequencing ,medicine ,Humans ,Diabetic Nephropathies ,urinary extracellular vesicles ,Biomarker discovery ,Research Articles ,Aged ,Kidney ,Cell Biology ,Extracellular vesicle ,Middle Aged ,Prognosis ,Molecular biology ,diabetic kidney disease ,Microvesicles ,Blot ,MicroRNAs ,Diabetes Mellitus, Type 1 ,030104 developmental biology ,MRNA Sequencing ,medicine.anatomical_structure ,Gene Expression Regulation ,3121 General medicine, internal medicine and other clinical medicine ,Case-Control Studies ,030220 oncology & carcinogenesis ,1182 Biochemistry, cell and molecular biology ,Biomarker (medicine) ,Female ,isolation ,Biomarkers ,Research Article ,Follow-Up Studies - Abstract
Urinary Extracellular Vesicles (uEV) have emerged as a source for biomarkers of kidney damage, holding potential to replace the conventional invasive techniques including kidney biopsy. However, comprehensive studies characterizing uEV isolation methods with patient samples are rare. Here we compared performance of three established uEV isolation workflows for their subsequent use in transcriptomics analysis for biomarker discovery in diabetic kidney disease. We collected urine samples from individuals with type 1 diabetes with macroalbuminuria and healthy controls. We isolated uEV by Hydrostatic Filtration Dialysis (HFD), ultracentrifugation (UC), and a commercial kit- based isolation method (NG), each with different established urine clearing steps. Purified EVs were analysed by electron microscopy, nanoparticle tracking analysis, and Western blotting. Isolated RNAs were subjected to miRNA and RNA sequencing. HFD and UC samples showed close similarities based on mRNA sequencing data. NG samples had a lower number of reads and different mRNA content compared to HFD or UC. For miRNA sequencing data, satisfactory miRNA counts were obtained by all methods, but miRNA contents differed slightly. This suggests that the isolation workflows enrich specific subpopulations of miRNA-rich uEV preparation components. Our data shows that HFD,UC and the kit-based method are suitable methods to isolate uEV for miRNA-seq. However, only HFD and UC were suitable for mRNA-seq in our settings.
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- 2020
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26. Genome-wide association analyses highlight etiological differences underlying newly defined subtypes of diabetes
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Dina, Mansour Aly, Om Prakash, Dwivedi, Rashmi B, Prasad, Annemari, Käräjämäki, Rebecka, Hjort, Manonanthini, Thangam, Mikael, Åkerlund, Anubha, Mahajan, Miriam S, Udler, Jose C, Florez, Mark I, McCarthy, Julia, Brosnan, Olle, Melander, Sofia, Carlsson, Ola, Hansson, Tiinamaija, Tuomi, Leif, Groop, and Lyndon J, Mitnaul
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Adult ,Aged, 80 and over ,Sweden ,Adolescent ,Infant ,Middle Aged ,Lipids ,Polymorphism, Single Nucleotide ,Body Mass Index ,Young Adult ,Diabetes Mellitus, Type 1 ,Diabetes Mellitus, Type 2 ,Child, Preschool ,Insulin Secretion ,Humans ,Genetic Predisposition to Disease ,Child ,Aged ,Genome-Wide Association Study - Abstract
Type 2 diabetes has been reproducibly clustered into five subtypes with different disease progression and risk of complications; however, etiological differences are unknown. We used genome-wide association and genetic risk score (GRS) analysis to compare the underlying genetic drivers. Individuals from the Swedish ANDIS (All New Diabetics In Scania) study were compared to individuals without diabetes; the Finnish DIREVA (Diabetes register in Vasa) and Botnia studies were used for replication. We show that subtypes differ with regard to family history of diabetes and association with GRS for diabetes-related traits. The severe insulin-resistant subtype was uniquely associated with GRS for fasting insulin but not with variants in the TCF7L2 locus or GRS reflecting insulin secretion. Further, an SNP (rs10824307) near LRMDA was uniquely associated with mild obesity-related diabetes. Therefore, we conclude that the subtypes have partially distinct genetic backgrounds indicating etiological differences.
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- 2020
27. Aetiological differences between novel subtypes of diabetes derived from genetic associations
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Dina Mansour Aly, Rashmi B. Prasad, Ola Hansson, Mikael Åkerlund, Rebecka Hjort, Julia Brosnan, Olle Melander, Jose C. Florez, Tiinamaija Tuomi, Leif Groop, Om Prakash Dwivedi, Annemari Käräjämäki, Sofia Carlsson, Mark I. McCarthy, Emma Ahlqvist, Miriam S. Udler, and Anubha Mahajan
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Oncology ,0303 health sciences ,medicine.medical_specialty ,business.industry ,030209 endocrinology & metabolism ,Genome-wide association study ,Disease ,Type 2 diabetes ,medicine.disease ,3. Good health ,03 medical and health sciences ,0302 clinical medicine ,Insulin resistance ,Diabetes mellitus ,Internal medicine ,Cohort ,medicine ,Family history ,business ,030304 developmental biology ,Genetic association - Abstract
BackgroundType 2 diabetes (T2D) is a multi-organ disease defined by hyperglycemia resulting from different disease mechanisms. Using clinical parameters measured at diagnosis (age, BMI, HbA1c, HOMA2-B, HOMA2-IR and GAD autoantibodies) adult patients with diabetes have been reproducibly clustered into five subtypes, that differed clinically with respect to disease progression and outcomes.1 In this study we use genetic information to investigate if these subtypes have distinct underlying genetic drivers.MethodsGenome-wide association (GWAS) and genetic risk score (GRS) analysis was performed in Swedish (N=12230) and Finnish (N=4631) cohorts. Family history was recorded by questionnaires.ResultsSevere insulin-deficient diabetes (SIDD) and mild obesity-related diabetes (MOD) groups had the strongest family history of T2D. A GRS including known T2D loci was strongly associated with SIDD (OR per 1 SD increment [95% CI]=1.959 [1.814-2.118]), MOD (OR 1.726 [1.607-1.855]) and mild age-related diabetes (MARD) (OR 1.771 [1.671-1.879]), whereas it was less strongly associated with severe insulin-resistant diabetes (SIRD, OR 1.244 [1.157-1.337]), which was similar to severe autoimmune diabetes (SAID, OR 1.282 [1.160-1.418]). SAID showed strong association with the GRS for T1D, whereas the non-autoimmune subtype SIDD was most strongly associated with the GRS for insulin secretion rate (P−9). SIRD showed no association with variants in TCF7L2 or any GRS reflecting insulin secretion. Instead, only SIRD was associated with GRS for fasting insulin (P=3.10×10−8). Finally, a T2D locus, rs10824307 near the ZNF503 gene was uniquely associated with MOD (ORmeta=1.266 (1.170-1.369), P=4.3×10−9).ConclusionsNew diabetes subtypes have partially different genetic backgrounds and subtype-specific risk loci can be identified. Especially the SIRD subtype stands out by having lower heritability and less involvement of beta-cell related pathways in its pathogenesis.Research in contextEvidence before this studyIn March 2018 we suggested a novel subclassification of diabetes into five subtypes. This classification was based on clustering using clinical parameters commonly measured at diabetes diagnosis (age at diabetes onset, HbA1c, bodymass index, presence of GAD autoantibodies and HOMA2 indices for insulin resistance and secretion). These subtypes differed with respect to clinical characteristics, disease progression and risk of complications, but it remained unclear to what extent these subtypes have different underlying pathologies. In our original publication we analysed a small set of genetic risk variants for diabetes and found differential associations between subtypes, suggesting potential aetiological differences.Added value of this studyIn this study we have conducted a full genome analysis of the original ANDIS cohort, including genome-wide association studies and polygenic risk score analysis with replication in an independent cohort. We have also compared heritability and prevalence of having a family history of diabetes in the subtypes.Implications of all the available evidenceWe demonstrate that stratification into subtypes facilitates identification of genetic risk loci and that the aetiology of the subtypes is at least partially distinct. These results are especially important for the future study and treatment of individuals belonging to the severe insulin-resistant diabetes (SIRD) subtype, whose pathogenesis appears to differ substantially from that of traditional T2D.
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- 2020
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28. Genetic inactivation of ANGPTL4 improves glucose homeostasis and is associated with reduced risk of diabetes
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Teresa Tusié-Luna, Svati H. Shah, Wen-Jane Lee, Amit Khera, Gonçalo R. Abecasis, Olle Melander, Alan R. Shuldiner, Connor A. Emdin, Kari Stefansson, Jesper Gromada, Andrew P. Morris, Lee-Ming Chuang, Omri Gottesman, Lars G. Fritsche, Pradeep Natarajan, Marju Orho-Melander, Daniel F. Gudbjartsson, Anubha Mahajan, Marylyn D. Ritchie, William E. Kraus, Tooraj Mirshahi, Colm O'Dushlaine, Jason Flannick, Nicholas J. Wareham, Anne Tybjærg-Hansen, Anders Berg Wulff, Rashmi B. Prasad, Aris Baras, Jonas B. Nielsen, Valgerdur Steinthorsdottir, Yii-Der Ida Chen, Jerome I. Rotter, Lukas Habegger, Samantha N. Fetterolf, David Altshuler, Om Prakash Dwivedi, Tanya M. Teslovich, Cristen J. Willer, Luca A. Lotta, Andrew J. Murphy, Joseph B. Leader, Cristopher V. Van Hout, Christopher D. Still, Ola Hansson, David Birtwell, Alexander Lopez, Daniel J. Rader, John D. Overton, Anthony Marcketta, Patrick Sulem, Peter N. Benotti, Jose C. Florez, Lydia Coulter Kwee, David J. Carey, Oddgeir L. Holmen, Kristian Hveem, Leif Groop, Sekar Kathiresan, Viktoria Gusarova, Unnur Thorsteinsdottir, Cassandra M. Hartle, Uyenlinh L. Mirshahi, H. Lester Kirchner, Shannon Bruse, Robert A. Scott, Michael F. Murray, Marketa Sjögren, Jeffrey G. Reid, Aeron Small, Børge G. Nordestgaard, Amr H. Wardeh, Chad M. Brummett, Mark I. McCarthy, Frederick E. Dewey, David H. Ledbetter, John Penn, Ingrid B. Borecki, Scott M. Damrauer, Hilma Holm, Michael Boehnke, George D. Yancopoulos, Institute for Molecular Medicine Finland, University of Helsinki, Centre of Excellence in Complex Disease Genetics, and HUS Abdominal Center
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Blood Glucose ,Male ,0301 basic medicine ,Insulin Resistance/genetics ,General Physics and Astronomy ,Type 2 diabetes ,030204 cardiovascular system & hematology ,Inbred C57BL ,Cardiovascular ,HAN CHINESE ,Whole Exome Sequencing ,Mice ,0302 clinical medicine ,Risk Factors ,ANGPTL4 ,Homeostasis ,Glucose homeostasis ,lcsh:Science ,Mice, Knockout ,Lipoprotein lipase ,Multidisciplinary ,Diabetes ,Lipoprotein Lipase/metabolism ,REMNANT CHOLESTEROL ,ADIPOSE-TISSUE ,Female ,Type 2 ,Heterozygote ,medicine.medical_specialty ,Knockout ,Science ,LIPOPROTEIN-LIPASE ,HEART-DISEASE ,Diabetes Mellitus, Type 2/etiology ,Article ,General Biochemistry, Genetics and Molecular Biology ,Angiopoietin-like 4 Protein/deficiency ,03 medical and health sciences ,Internal medicine ,Diabetes mellitus ,Exome Sequencing ,Diabetes Mellitus ,Genetics ,medicine ,Angiopoietin-Like Protein 4 ,Animals ,Humans ,Gene Silencing ,GENOME-WIDE ASSOCIATION ,Metabolic and endocrine ,Genetic Association Studies ,CHINESE POPULATION ,Blood Glucose/metabolism ,PLASMA-LIPIDS ,business.industry ,Case-control study ,Genetic Variation ,General Chemistry ,Odds ratio ,Atherosclerosis ,medicine.disease ,Mice, Inbred C57BL ,Lipoprotein Lipase ,030104 developmental biology ,Endocrinology ,Diabetes Mellitus, Type 2 ,Amino Acid Substitution ,Case-Control Studies ,lcsh:Q ,3111 Biomedicine ,ANGIOPOIETIN-LIKE PROTEIN-4 ,Insulin Resistance ,business - Abstract
Angiopoietin-like 4 (ANGPTL4) is an endogenous inhibitor of lipoprotein lipase that modulates lipid levels, coronary atherosclerosis risk, and nutrient partitioning. We hypothesize that loss of ANGPTL4 function might improve glucose homeostasis and decrease risk of type 2 diabetes (T2D). We investigate protein-altering variants in ANGPTL4 among 58,124 participants in the DiscovEHR human genetics study, with follow-up studies in 82,766 T2D cases and 498,761 controls. Carriers of p.E40K, a variant that abolishes ANGPTL4 ability to inhibit lipoprotein lipase, have lower odds of T2D (odds ratio 0.89, 95% confidence interval 0.85–0.92, p = 6.3 × 10−10), lower fasting glucose, and greater insulin sensitivity. Predicted loss-of-function variants are associated with lower odds of T2D among 32,015 cases and 84,006 controls (odds ratio 0.71, 95% confidence interval 0.49–0.99, p = 0.041). Functional studies in Angptl4-deficient mice confirm improved insulin sensitivity and glucose homeostasis. In conclusion, genetic inactivation of ANGPTL4 is associated with improved glucose homeostasis and reduced risk of T2D., Genetic variation in ANGPTL4 is associated with lipid traits. Here, the authors find that predicted loss-of-function variants in ANGPTL4 are associated with glucose homeostasis and reduced risk of type 2 diabetes and that Angptl4−/− mice on a high-fat diet show improved insulin sensitivity.
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- 2018
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29. Representations of Precarity in South Asian Literature in English
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Om Prakash Dwivedi and Om Prakash Dwivedi
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- Poor in literature, English literature--South Asian authors--History and criticism
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This book analyzes precarious conditions and their manifestations in recent South Asian literature in English. Themes of disability, rural-urban division, caste, terrorism, poverty, gender, necropolitics, and uneven globalization are discussed in this book by established and emerging international scholars. Drawing their arguments from literary works rooted in the neoliberal period, the chapters show how the extractive ideology of neoliberalism invades the cultural, political, economic, and social spheres of postcolonial South Asia. The book explores different forms of “precarity” to investigate the vulnerable and insecure life conditions embodied in the everyday life of South Asia, enabling the reader to see through the rhetoric of “rising Asia”.
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- 2022
30. Impaired hepatic lipid synthesis from polyunsaturated fatty acids in TM6SF2 E167K variant carriers with NAFLD
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Panu K. Luukkonen, Jeremy M. Palmer, Taru Tukiainen, Marja Leivonen, Marju Orho-Melander, Hannele Yki-Järvinen, Adnan Ali, Johanna Arola, Petter Vikman, Leif Groop, Matej Orešič, Tuulia Hyötyläinen, Emma Scott, P.A. Nidhina Haridas, Vesa M. Olkkonen, Quentin M. Anstee, You Zhou, Anne Juuti, Linda Ahonen, Om Prakash Dwivedi, Department of Medicine, Clinicum, Institute for Molecular Medicine Finland, II kirurgian klinikka, Department of Surgery, Medicum, Department of Pathology, Leif Groop Research Group, Hannele Yki-Järvinen Research Group, HUS Internal Medicine and Rehabilitation, and HUS Abdominal Center
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Male ,0301 basic medicine ,Apolipoprotein B ,Lipoproteins, VLDL ,chemistry.chemical_compound ,ta318 ,chemistry.chemical_classification ,INSULIN-RESISTANCE ,biology ,NONALCOHOLIC STEATOHEPATITIS ,Middle Aged ,Lipids ,Transmembrane protein ,3. Good health ,Liver ,Arachidonic acid ,LOW-DENSITY LIPOPROTEINS ,CARDIOVASCULAR-DISEASE ,Phosphatidylethanolamine N-methyltransferase ,Lipogenesis ,Fatty Acids, Unsaturated ,Phosphatidylcholines ,Female ,lipids (amino acids, peptides, and proteins) ,Polyunsaturated fatty acid ,Adult ,Heterozygote ,medicine.medical_specialty ,Genotype ,APOLIPOPROTEIN-B ,Cholesterol esters ,digestive system ,03 medical and health sciences ,Insulin resistance ,LIVER-DISEASE ,Internal medicine ,medicine ,Humans ,Fatty acids ,Triglycerides ,Hepatology ,PHOSPHATIDYLETHANOLAMINE N-METHYLTRANSFERASE ,Membrane Proteins ,nutritional and metabolic diseases ,ARACHIDONIC-ACID ,medicine.disease ,digestive system diseases ,030104 developmental biology ,Endocrinology ,chemistry ,3121 General medicine, internal medicine and other clinical medicine ,Hepatocytes ,FIBROSIS PROGRESSION ,biology.protein ,Transmembrane 6 superfamily member 2 ,SUPERFAMILY MEMBER 2 ,Non-alcoholic fatty liver disease ,TM6SF2 - Abstract
Background: Carriers of the transmembrane 6 superfamily member 2 E167K gene variant (TM6SF2(EK/KK)) have decreased expression of the TM6SF2 gene and increased risk of NAFLD and NASH. Unlike common 'obese/metabolic' NAFLD, these subjects lack hypertriglyceridemia and have lower risk of cardiovascular disease. In animals, phosphatidylcholine (PC) deficiency results in a similar phenotype. PCs surround the core of VLDL consisting of triglycerides (TGs) and cholesteryl-esters (CEs). We determined the effect of the TM6SF2 E167K on these lipids in the human liver and serum and on hepatic gene expression and studied the effect of TM6SF2 knockdown on hepatocyte handling of these lipids. Methods: Liver biopsies were taken from subjects characterized with respect to the TM6SF2 genotype, serum and liver lipidome, gene expression and histology. In vitro, after TM6SF2 knockdown in HuH-7 cells, we compared incorporation of different fatty acids into TGs, CEs, and PCs. Results: The TM6SF2(EK/KK) and TM6SF2EE groups had similar age, gender, BMI and HOMA-IR. Liver TGs and CEs were higher and liver PCs lower in the TM6SF2(EK/KK) than the TM6SF2EE group (p Conclusions: Hepatic lipid synthesis from PUFAs is impaired and could contribute to deficiency in PCs and increased intrahepatic TG in TM6SF2 E167K variant carriers. (C) 2017 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.
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- 2017
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31. Recent Development in Ferulic Acid Esterase for Industrial Production
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Surabhi Singh, Shashank Mishra, and Om Prakash Dwivedi
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Ferulic acid ,chemistry.chemical_compound ,chemistry ,Industrial production ,Food science ,Ferulic acid esterase - Published
- 2019
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32. Loss of ZnT8 function protects against diabetes by enhanced insulin secretion
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Maddalena Trombetta, Fernando Abaitua, Isabella Artner, Nicola L. Beer, Ulrika Krus, Reshma Ramracheya, Jesper Gromada, Jason Flannick, Philipp Kramer, Martijn van de Bunt, Mark I. McCarthy, Deepak Jain, Patrik Rorsman, Enzo Bonora, Rebecca Cheung, Julia Brosnan, Ioannis Spiliotis, Anu Suoranta, Pauline Chabosseau, Antje Grotz, Ann Marie Richard, Claes B. Wolheim, Ola Hansson, Riccardo C. Bonadonna, Anna L. Gloyn, Leif Groop, Om Prakash Dwivedi, Mikko Lehtovirta, Anthony Payne, Timo Otonkoski, Vikash Chandra, L Sarelin, Nicole A.J. Krentz, Sandra Kleiner, Benjamin Davies, Soren K. Thomsen, Benoit Hastoy, Guy A. Rutter, Tiinamaija Tuomi, Daniel Gomez, Benoite Champon, Jens O. Lagerstedt, Emma Ahlqvist, Aris Baras, Daniela Moralli, Rashmi B. Prasad, and Andria Theodoulou
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Adult ,Male ,medicine.medical_specialty ,endocrine system ,endocrine system diseases ,Adolescent ,Genotype ,Induced Pluripotent Stem Cells ,Type 2 diabetes ,Zinc Transporter 8 ,Biology ,Article ,Aged ,Diabetes Mellitus, Type 2 ,Female ,Glucose ,Humans ,Islets of Langerhans ,Middle Aged ,Young Adult ,Insulin Secretion ,03 medical and health sciences ,0302 clinical medicine ,Diabetes mellitus ,Internal medicine ,Diabetes Mellitus ,Genetics ,medicine ,Glucose homeostasis ,Allele ,11 Medical and Health Sciences ,030304 developmental biology ,Proinsulin ,0303 health sciences ,SLC30A8 ,Glucagon secretion ,06 Biological Sciences ,medicine.disease ,Endocrinology ,biology.protein ,Type 2 ,030217 neurology & neurosurgery ,Developmental Biology - Abstract
A rare loss-of-function allele p.Arg138* in SLC30A8 encoding the zinc transporter 8 (ZnT8), which is enriched in Western Finland, protects against type 2 diabetes (T2D). We recruited relatives of the identified carriers and showed that protection was associated with better insulin secretion due to enhanced glucose responsiveness and proinsulin conversion, particularly when compared with individuals matched for the genotype of a common T2D-risk allele in SLC30A8, p.Arg325. In genome-edited human induced pluripotent stem cell (iPSC)-derived β-like cells, we establish that the p.Arg138* allele results in reduced SLC30A8 expression due to haploinsufficiency. In human β cells, loss of SLC30A8 leads to increased glucose responsiveness and reduced KATP channel function similar to isolated islets from carriers of the T2D-protective allele p.Trp325. These data position ZnT8 as an appealing target for treatment aimed at maintaining insulin secretion capacity in T2D.
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- 2019
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33. Production of Ferulic Acid Esterase from Aspergillus Oryzae (NCIM 1212)
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Om Prakash Dwivedi
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Aspergillus oryzae ,biology ,Chemistry ,Ferulic acid esterase ,Food science ,biology.organism_classification - Abstract
The majority of valuable compounds used worldwide are produced by chemical synthesis at very low cost, though consumers prefer to natural compounds because of their health awareness in daily life. Ferulic acid is one of the most valuable compounds having widespread application in various fields such as in baking, cosmetic, beverage and pharma industries, also used as a raw material for the production of vanillin, the most flavouring compound. Ferulic acid esterase is the enzyme that hydrolyzes the ester bond between the ferulic acid and polysaccharides present in plant cell wall and release ferulic acid from agro residues. The production of ferulic acid esterase activity by strains was detected in agar plate assay. The assay involves ethyl ferulate as a sole carbon source in specific media. Of the examined strains Aspergillus oryzae (NCIM 1212) showed the highest level of ferulic acid esterase activity 281 U/mg at the optimum pH and temperature of 5.5 and 35°C. Supplementation of soyabean meal (0.75%) as nitrogen source and sucrose (0.1%) as additional carbon source favored enzyme production.
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- 2019
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34. Common variants of ARID1A and KAT2B are associated with obesity in Indian adolescents
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Anil K. Giri, Vaisak Parekatt, Khushdeep Bandesh, Gauri Prasad, Nikhil Tandon, Dwaipayan Bharadwaj, Om Prakash Dwivedi, and Priyanka Banerjee
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Male ,0301 basic medicine ,Adolescent ,ARID1A ,lcsh:Medicine ,India ,030209 endocrinology & metabolism ,Overweight ,Bioinformatics ,Article ,Energy homeostasis ,Body Mass Index ,03 medical and health sciences ,0302 clinical medicine ,Gene Frequency ,Genetic variation ,medicine ,Humans ,Genetic Predisposition to Disease ,p300-CBP Transcription Factors ,Obesity ,lcsh:Science ,Child ,Allele frequency ,Multidisciplinary ,business.industry ,lcsh:R ,Nuclear Proteins ,medicine.disease ,Chromatin ,DNA-Binding Proteins ,030104 developmental biology ,lcsh:Q ,Female ,medicine.symptom ,business ,Body mass index ,Transcription Factors - Abstract
Obesity involves alterations in transcriptional programs that can change in response to genetic and environmental signals through chromatin modifications. Since chromatin modifications involve different biochemical, neurological and molecular signaling pathways related to energy homeostasis, we hypothesize that genetic variations in chromatin modifier genes can predispose to obesity. Here, we assessed the associations between 179 variants in 35 chromatin modifier genes and overweight/obesity in 1283 adolescents (830 normal weight and 453 overweight/obese). This was followed up by the replication analysis of associated signals (18 variants in 8 genes) in 2247 adolescents (1709 normal weight and 538 overweight/obese). Our study revealed significant associations of two variants rs6598860 (OR = 1.27, P = 1.58 × 10–4) and rs4589135 (OR = 1.22, P = 3.72 × 10–4) in ARID1A with overweight/obesity. We also identified association of rs3804562 (β = 0.11, P = 1.35 × 10–4) in KAT2B gene with BMI. In conclusion, our study suggests a potential role of ARID1A and KAT2B genes in the development of obesity in adolescents and provides leads for further investigations.
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- 2018
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35. Human Rights in Postcolonial India
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Om Prakash Dwivedi, V. G. Julie Rajan, Om Prakash Dwivedi, and V. G. Julie Rajan
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- Human rights--India, Human rights, Bu¨rgerrecht, Menschenrecht, Postkolonialismus, India
- Abstract
This volume looks at human rights in independent India through frameworks comparable to those in other postcolonial nations in the Global South. It examines wide-ranging issues that require immediate attention such as those related to disability, violence, torture, education, LGBT, neoliberalism, and social justice. The essays presented here explore the discourse surrounding human rights, and engage with aspects linked to the functioning of democracy, security and strategic matters, and terrorism, especially post 9/11. They also discuss cases connected with human rights violations in India and underline the need for a transparent approach and a more comprehensive perspective of India's human rights record.Part of the series Ethics, Human Rights and Global Political Thought, the volume will be an important resource for academics, policy makers, civil society organisations, lawyers and those concerned with human rights. It will also be useful to scholars and researchers of Indian politics, law and sociology.
- Published
- 2016
36. Genome-Wide Association Study for Type 2 Diabetes in Indians Identifies a New Susceptibility Locus at 2q21
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Ganesh Chauhan, Alok Jaiswal, Reddy K. Srinath, Lakshmi Ramakrishnan, Nikhil Tandon, Pradeep Venkatesh, Dwaipayan Bharadwaj, Sri Venkata Madhu, Sreenivas Chavali, Saurabh Ghosh, Anil Bhansali, Indico, Manickam Chidambaram, Amitabh Sharma, Viral N. Shah, Ismeet Kaur, S.K. Aggarwal, Sandeep Kumar Mathur, Monisha Banerjee, Madhukar Saxena, Om Prakash Dwivedi, Tejbir Singh, Radha Venkatesan, Rubina Tabassum, Viswanathan Mohan, Benan John Mathai, Shantanu Sengupta, Khushdeep Bandesh, Raman K. Marwaha, Vinod Scaria, Mark I. McCarthy, Yogesh Pandey, Dorairaj Prabhakaran, Anubha Mahajan, and Analabha Basu
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Endocrinology, Diabetes and Metabolism ,India ,Nerve Tissue Proteins ,030209 endocrinology & metabolism ,Locus (genetics) ,Genome-wide association study ,Type 2 diabetes ,Biology ,Polymorphism, Single Nucleotide ,White People ,03 medical and health sciences ,0302 clinical medicine ,Insulin resistance ,Asian People ,Diabetes mellitus ,Internal Medicine ,medicine ,Humans ,Genetic Predisposition to Disease ,Aged ,030304 developmental biology ,Genetics ,0303 health sciences ,Membrane Proteins ,Genetics/Genomes/Proteomics/Metabolomics ,Odds ratio ,Middle Aged ,medicine.disease ,3. Good health ,Diabetes Mellitus, Type 2 ,Genetic Loci ,Chromosomes, Human, Pair 2 ,Homeostatic model assessment ,Insulin Resistance ,Imputation (genetics) ,Genome-Wide Association Study - Abstract
Indians undergoing socioeconomic and lifestyle transitions will be maximally affected by epidemic of type 2 diabetes (T2D). We conducted a two-stage genome-wide association study of T2D in 12,535 Indians, a less explored but high-risk group. We identified a new type 2 diabetes–associated locus at 2q21, with the lead signal being rs6723108 (odds ratio 1.31; P = 3.32 × 10−9). Imputation analysis refined the signal to rs998451 (odds ratio 1.56; P = 6.3 × 10−12) within TMEM163 that encodes a probable vesicular transporter in nerve terminals. TMEM163 variants also showed association with decreased fasting plasma insulin and homeostatic model assessment of insulin resistance, indicating a plausible effect through impaired insulin secretion. The 2q21 region also harbors RAB3GAP1 and ACMSD; those are involved in neurologic disorders. Forty-nine of 56 previously reported signals showed consistency in direction with similar effect sizes in Indians and previous studies, and 25 of them were also associated (P < 0.05). Known loci and the newly identified 2q21 locus altogether explained 7.65% variance in the risk of T2D in Indians. Our study suggests that common susceptibility variants for T2D are largely the same across populations, but also reveals a population-specific locus and provides further insights into genetic architecture and etiology of T2D.
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- 2013
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37. Human Rights in Postcolonial India
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Om Prakash Dwivedi and Pramod Nayar
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- 2016
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38. Strong influence of variants near MC4R on adiposity in children and adults: a cross-sectional study in Indian population
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Saurabh Ghosh, Ismeet Kaur, Rubina Tabassum, Nikhil Tandon, Dwaipayan Bharadwaj, Om Prakash Dwivedi, Ganesh Chauhan, and Raman K. Marwaha
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Cross-sectional study ,India ,Type 2 diabetes ,Polymorphism, Single Nucleotide ,White People ,Internal medicine ,Genetics ,medicine ,Humans ,Genetic Predisposition to Disease ,Obesity ,Child ,Alleles ,Genetics (clinical) ,Adiposity ,business.industry ,Body Weight ,Indian population ,Genetic Variation ,Middle Aged ,medicine.disease ,Cross-Sectional Studies ,Phenotype ,Endocrinology ,Diabetes Mellitus, Type 2 ,Receptor, Melanocortin, Type 4 ,Female ,Insulin Resistance ,Waist Circumference ,business ,Demography - Abstract
Common variants near melanocortin 4 receptor (MC4R) gene are shown to be associated with adiposity but have varied effects in different age groups. Among Indians, studies have shown association of these variants with obesity in adults, but their association in children is yet to be confirmed. We evaluated association of rs17782313 and rs12970134 near MC4R with adiposity and related traits in Indians including 1362 children and 4077 adults (consisting of 2049 diabetic and 2028 nondiabetic adult subjects). Both variants rs17782313 and rs12970134 showed strong association with adiposity measures (weight, body mass index and waist circumference) in children (P-range 7.6 × 10(-5)-3.8 × 10(-12)) and nominal association in nondiabetic adults (P-range 0.05-0.003). Effect sizes on adiposity measures in children (β range 0.22-0.26 Z-score) were ~3-fold higher compared with adults (β range 0.06-0.08). The minor alleles of both variants showed borderline association (P-range 0.08-0.04) with risk of type 2 diabetes in adults. Meta-analysis of rs12970134 in12 000 Indian adults corroborated its association with adiposity (P≤2.2 × 10(-9)), homeostasis model assessment-estimated insulin resistance (P=4.0 × 10(-5)) and type 2 diabetes (P=0.003) with only moderate heterogeneity, suggesting similar effect on adult Indians residing in different geographical regions. In conclusion, the study demonstrates association of variants near MC4R with obesity and related traits in Indian children and adults, with higher impact during childhood.
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- 2012
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39. Association of variants in genes involved in pancreatic β-cell development and function with type 2 diabetes in North Indians
- Author
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Ganesh Chauhan, Sreenivas Chavali, Saurabh Ghosh, Rubina Tabassum, Anubha Mahajan, Om Prakash Dwivedi, Nikhil Tandon, and Dwaipayan Bharadwaj
- Subjects
medicine.medical_specialty ,Genotype ,Nerve Tissue Proteins ,Type 2 diabetes ,Biology ,Polymorphism, Single Nucleotide ,ABCC8 ,Body Mass Index ,Insulin-Secreting Cells ,Internal medicine ,Basic Helix-Loop-Helix Transcription Factors ,Genetics ,medicine ,Humans ,Genetic Predisposition to Disease ,Obesity ,Genetics (clinical) ,Genetic association ,Homeodomain Proteins ,Haplotype ,Genetic Variation ,Nuclear Proteins ,Odds ratio ,medicine.disease ,HNF1A ,Homeobox Protein Nkx-2.2 ,Endocrinology ,Diabetes Mellitus, Type 2 ,Haplotypes ,Hepatocyte Nuclear Factor 4 ,Case-Control Studies ,Indians, North American ,biology.protein ,PDX1 ,Transcription Factors - Abstract
Variants in genes involved in pancreatic β-cell development and function are known to cause monogenic forms of type 2 diabetes and are also associated with complex form. In this study, we studied the genetic association of polymorphisms in such important genes with type 2 diabetes in the high-risk Indians. We genotyped 91 polymorphisms in 19 genes (ABCC8, HNF1A, HNF1B, HNF4A, INS, INSM1, ISL1, KCNJ11, MAFA, MNX1, NEUROD1, NEUROG3, NKX2.2, NKX6.1, PAX4, PAX6, PDX1, USF1 and WFS1) in 2025 unrelated North Indians of Indo-European ethnicity comprising of 1019 diabetic and 1006 non-diabetic subjects. HNF4A promoter P2 polymorphisms rs1884613 and rs2144908, which are in high linkage disequilibrium, showed significant association with type 2 diabetes (odds ratio (OR)=1.37 (95% confidence interval (CI) 1.19-1.57), P=9.4 × 10(-6) for rs1884613 and OR=1.37 (95%CI 1.20-1.57), P=6.0 × 10(-6) for rs2144908), as previously shown in other populations. We observed body mass index-dependent association of these variants with type 2 diabetes in normal-weight/lean subjects. Variants in USF1, ABCC8, ISL1 and KCNJ11 showed nominal association, while haplotypes in these genes were significantly associated. rs3812704 upstream of NEUROG3 significantly increased risk for type 2 diabetes in normal-weight/lean subjects (OR=1.68 (95%CI 1.25-2.24), P=4.9 × 10(-4)). Thus, pancreatic β-cell development and function genes contribute to susceptibility to type 2 diabetes in North Indians.
- Published
- 2011
- Full Text
- View/download PDF
40. Reviews
- Author
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Bruce King, Muneeza Shamsie, Humaira Saeed, Nirmala Menon, Lizzy Attree, Lucy Collins, Jennifer Lawn, and Om Prakash Dwivedi
- Subjects
Literature and Literary Theory - Published
- 2011
- Full Text
- View/download PDF
41. Impact of Common Variants of PPARG, KCNJ11, TCF7L2, SLC30A8, HHEX, CDKN2A, IGF2BP2, and CDKAL1 on the Risk of Type 2 Diabetes in 5,164 Indians
- Author
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Chittaranjan S. Yajnik, Sreenivas Chavali, Smita R. Kulkarni, Rubina Tabassum, Om Prakash Dwivedi, Giriraj R. Chandak, Ganesh Chauhan, Seema Bhaskar, S. Prakash, M.V. Kranthi Kumar, Saurabh Ghosh, Nikhil Tandon, Dwaipayan Bharadwaj, Anubha Mahajan, and Charles J. Spurgeon
- Subjects
Male ,endocrine system diseases ,Endocrinology, Diabetes and Metabolism ,Genome-wide association study ,Type 2 diabetes ,0302 clinical medicine ,Reference Values ,Ethnicity ,Cation Transport Proteins ,Aged, 80 and over ,Genetics ,tRNA Methyltransferases ,0303 health sciences ,SLC30A8 ,RNA-Binding Proteins ,Middle Aged ,3. Good health ,Female ,TCF Transcription Factors ,Transcription Factor 7-Like 2 Protein ,medicine.medical_specialty ,Genotype ,India ,030209 endocrinology & metabolism ,Single-nucleotide polymorphism ,Zinc Transporter 8 ,Biology ,White People ,03 medical and health sciences ,Internal medicine ,Internal Medicine ,medicine ,Humans ,Potassium Channels, Inwardly Rectifying ,CDKAL1 ,Cyclin-Dependent Kinase Inhibitor p16 ,Aged ,030304 developmental biology ,Genetic association ,Homeodomain Proteins ,Genetic Variation ,nutritional and metabolic diseases ,Cyclin-Dependent Kinase 5 ,Odds ratio ,medicine.disease ,PPAR gamma ,Diabetes Mellitus, Type 1 ,Endocrinology ,Diabetes Mellitus, Type 2 ,biology.protein ,TCF7L2 ,Genome-Wide Association Study ,Transcription Factors - Abstract
OBJECTIVE Common variants in PPARG, KCNJ11, TCF7L2, SLC30A8, HHEX, CDKN2A, IGF2BP2, and CDKAL1 genes have been shown to be associated with type 2 diabetes in European populations by genome-wide association studies. We have studied the association of common variants in these eight genes with type 2 diabetes and related traits in Indians by combining the data from two independent case–control studies. RESEARCH DESIGN AND METHODS We genotyped eight single nucleotide polymorphisms (PPARG-rs1801282, KCNJ11-rs5219, TCF7L2-rs7903146, SLC30A8-rs13266634, HHEX-rs1111875, CDKN2A-rs10811661, IGF2BP2-rs4402960, and CDKAL1-rs10946398) in 5,164 unrelated Indians of Indo-European ethnicity, including 2,486 type 2 diabetic patients and 2,678 ethnically matched control subjects. RESULTS We confirmed the association of all eight loci with type 2 diabetes with odds ratio (OR) ranging from 1.18 to 1.89 (P = 1.6 × 10−3 to 4.6 × 10−34). The strongest association with the highest effect size was observed for TCF7L2 (OR 1.89 [95% CI 1.71–2.09], P = 4.6 × 10−34). We also found significant association of PPARG and TCF7L2 with homeostasis model assessment of β-cell function (P = 6.9 × 10−8 and 3 × 10−4, respectively), which looked consistent with recessive and under-dominant models, respectively. CONCLUSIONS Our study replicates the association of well-established common variants with type 2 diabetes in Indians and shows larger effect size for most of them than those reported in Europeans.
- Published
- 2010
- Full Text
- View/download PDF
42. Obesity-dependent association of TNF-LTA locus with type 2 diabetes in North Indians
- Author
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Ganesh Chauhan, Rubina Tabassum, Anubha Mahajan, Nikhil Tandon, Dwaipayan Bharadwaj, Sreenivas Chavali, and Om Prakash Dwivedi
- Subjects
Male ,medicine.medical_specialty ,Genotype ,Population ,India ,Type 2 diabetes ,Biology ,White People ,Insulin resistance ,Internal medicine ,Drug Discovery ,medicine ,Humans ,Obesity ,Allele ,Promoter Regions, Genetic ,education ,Lymphotoxin-alpha ,Genetics (clinical) ,Aged ,education.field_of_study ,Tumor Necrosis Factor-alpha ,Middle Aged ,medicine.disease ,Minor allele frequency ,Endocrinology ,Diabetes Mellitus, Type 2 ,Genetic Loci ,Molecular Medicine ,Female ,Metabolic syndrome ,Body mass index - Abstract
Six common genetic variants (rs2229094, rs1041981, rs1800630, rs1800629, rs361525, and rs1800610) in the TNF-LTA locus encoding the pro-inflammatory cytokines tumor necrosis factor-alpha (TNF-α) and lymphotoxin-α have been shown to be associated with various metabolic traits including susceptibility to type 2 diabetes, metabolic syndrome, insulin resistance, and increased body mass index (BMI) in Caucasians from different geographic locations and have yielded mixed results. We tested for the association of these variants with type 2 diabetes in North Indians by studying 2,115 participants comprising of 1,073 type 2 diabetes patients and 1,042 controls. We report the association of a promoter region variant of TNF: rs1800630 and non-synonymous LTA variant: rs2229094 with type 2 diabetes [OR = 0.83 (95% CI 0.72–0.95), P = 0.005 and OR = 0.86 (95% CI 0.75–0.98), P = 0.02, respectively]. Although these associations were BMI-dependent, no interactive effect of BMI and variants on type 2 diabetes was detectable. Further, the haplotype carrying all the six major alleles conferred susceptibility to type 2 diabetes [OR = 1.23 (95% CI 1.06–1.42), P = 0.005; P permuted = 0.02], with the effect much enhanced in non-obese subjects [OR = 1.45 (95% CI 1.19–1.78), P = 2 × 10−4: P permuted = 3 × 10−4]. The minor allele of rs2229094 was associated with lower hsCRP, BMI, and waist circumference (WC), while the minor allele of rs1800630 showed association with lower BMI and WC (all P
- Published
- 2010
- Full Text
- View/download PDF
43. Genetic variants of FOXA2: risk of type 2 diabetes and effect on metabolic traits in North Indians
- Author
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Nikhil Tandon, Dwaipayan Bharadwaj, Rubina Tabassum, Sreenivas Chavali, and Om Prakash Dwivedi
- Subjects
Adult ,Blood Glucose ,Male ,medicine.medical_specialty ,Genotype ,India ,Locus (genetics) ,Single-nucleotide polymorphism ,Type 2 diabetes ,Biology ,Polymerase Chain Reaction ,Risk Factors ,Internal medicine ,Genetics ,medicine ,Humans ,Insulin ,Genetic Predisposition to Disease ,Obesity ,Allele ,Genetics (clinical) ,Polymorphism, Genetic ,C-Peptide ,Middle Aged ,medicine.disease ,Endocrinology ,Diabetes Mellitus, Type 2 ,Genetic epidemiology ,Statistical genetics ,Case-Control Studies ,Hepatocyte Nuclear Factor 3-beta ,Female ,Pharmacogenetics - Abstract
Here, we examined the association of genetic variants of FOXA2, an upstream activator of the beta-cell transcription factor network, with type 2 diabetes and related phenotypes in North India. We genotyped three SNPs (rs1212275, rs1055080, rs6048205) and the (TCC)( n ) repeat polymorphism in 1,656 participants comprising 1,031 patients with type 2 diabetes and 625 controls. SNPs rs1212275 and rs6048205 were uncommon (MAF5%) with similar distribution among patients and controls. We found a strong association of (TCC)( n ) common allele A5 with type 2 diabetes [OR = 1.66 (95% CI 1.36-2.04, p = 5.9 x 10(-7)) for A5 homozygotes]. Obese individuals with A5A5 genotype had enhanced risk when segregated from normal-weight subjects [OR = 1.92 (95% CI 1.47-2.51), p = 1.6 x 10(-6)]. A5 was also nominally associated with higher fasting glucose (p = 0.02) and lower fasting insulin (p = 0.0028) and C-peptide (p = 0.036) levels among controls. At the rs1055080 locus, GG was found to provide reduced risk among normal-weight subjects [OR = 0.59 (95% CI 0.40-0.88), p = 0.011]. Combination of protective GG and non-risk genotypes of (TCC)( n ) showed reduced risk of type 2 diabetes both among normal-weight [OR = 0.43 (95% CI 0.29-0.65), p = 1.2 x 10(-6)] and obese individuals [0.47 (95% CI 0.34-0.64), p = 4.3 x 10(-5)]. For the first time we demonstrated that FOXA2 variants may affect risk of type 2 diabetes and metabolic traits in North India, however replication analyses in other cohorts are required to confirm the findings.
- Published
- 2008
- Full Text
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44. Tracing the New Indian Diaspora
- Author
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Om Prakash Dwivedi and Om Prakash Dwivedi
- Subjects
- East Indian diaspora
- Abstract
The growing importance of the Indian diaspora is felt today across the globe due to its emergence as the second-largest dias¬poric community. By examining historical, socio-cultural, economic, political, and lite¬rary aspects of the Indian diaspora, this volume sets out to trace the latest devel¬opments in the field of Indian diaspora studies. It brings together essays by Indian and foreign scholars, thus providing an authoritative platform for discussions in which identities and affiliations are con¬tested and constituted through the hier¬archies of cross-cultural migration in this increasingly globalized world. This volume traces the transnational network of the Indian diaspora, and will prove of interest to scholars working in the fields of the Indian diaspora, diaspora theory, and cultural studies. Countries covered include Mauritius, Fiji, Singapore, Trinidad & Tobago, Guyana, Suriname, the UK, Ireland, the USA, Canada, Malaya, South Africa, and New Zealand. Creative writers dis¬cussed include Ramabai Espinet, Vikram Chandra, Rohinton Mistry, Chitra Banerjee Diva¬karuni, Nisha Ganatra, Jhumpa Lahiri, Kavery Nambisan, and Sarita Mandanna, along with the work of filmmakers (Mira Nair, Yash Chopra, Kabir Khan, Shuchi Kothari, Mandrika Rupa, Karan Johar, Sugu Pillay, Mallika Krishnamurthy, and Nisha Ganatra).
- Published
- 2014
45. Tabish Khair: Critical Perspectives
- Author
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Cristina M. Gámez-Fernández, Editor, Om Prakash Dwivedi, Editor, Cristina M. Gámez-Fernández, Editor, and Om Prakash Dwivedi, Editor
- Abstract
This volume approaches Tabish Khair's writings (both his theoretical proposals and his novels) from numerous different perspectives. Contributors engage from varied critical stances with Khair's academic writings in a fruitful dialogue, analyze his social, political and religious concerns, and elucidate his characteristics as a novelist and his literary powers. Furthermore, this volume is highly enriched by the presence of a hitherto unpublished play by Khair, entitled The One Percent Agency, which focuses on a tourism agency specializing in bringing “Bollywood”-style Indian weddings to foreign tourists. In the process, it becomes a satirical commentary on the packaging of international tourism as well as the ability of common Indians to adapt and thrive. It depicts the “metropolitan” India of the new millennium and inter-community relations in subtle and powerful ways.
- Published
- 2014
46. Postcolonial Theory in the Global Age : Interdisciplinary Essays
- Author
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Om Prakash Dwivedi, Martin Kich, Om Prakash Dwivedi, and Martin Kich
- Subjects
- Literature and transnationalism, Postcolonialism in literature, Literature and globalization, Nationalism in literature
- Abstract
The new essays in this collection examine newer forms of colonialism operating today in an increasingly globalized world. Recognizing the complexities and culpability of postcolonial politics, the contributors fill gaps that exist at theoretical levels of postcolonial studies. By studying film, literature, history and architecture, they arrive at new ideas about immigration, gender, cultural translation, identity and the future. The collection is driven by notions of ethics, an increasingly influential force at the grassroots if not the international level, addressing capitalism and its attendant drawbacks throughout the course of the book.
- Published
- 2013
47. The new xenophobia
- Author
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Om Prakash Dwivedi
- Subjects
Literature and Literary Theory ,Xenophobia ,media_common.quotation_subject ,Political science ,Criminology ,media_common - Published
- 2016
- Full Text
- View/download PDF
48. Indian Writing in English
- Author
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Om Prakash Dwivedi
- Published
- 2014
- Full Text
- View/download PDF
49. Introduction
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Lisa Lau and Om Prakash Dwivedi
- Published
- 2014
- Full Text
- View/download PDF
50. Urban India Re-Orientalised
- Author
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Om Prakash Dwivedi
- Subjects
History ,Economy ,Poverty ,Suri ,New delhi ,Metropolitan area ,Representation (politics) - Abstract
This chapter examines how Indian metropolitan cities as projected in contemporary Indian Writing in English (IWE) have led to the production of re-Orientalism. Through case studies of Manil Suri’s The City of Devi and Somnath Batabyal’s The Price You Pay, the chapter also analyses how in the recent past Indian cities, such as Bombay/Mumbai, New Delhi, and others, have been projected in post-millennial Indian fiction as sites of struggle, mimicry, and poverty, providing a re-Orientalist coherence and insistent (mis)representation of India’s postcoloniality.
- Published
- 2014
- Full Text
- View/download PDF
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