Transcriptome profiling reveals association of peripheral adipose tissue pathology with type-2 diabetes in Asian Indians
Author(s)
Type
Journal Article
Abstract
Type 2 Diabetes (T2D) is a complex disease with an elusive link between its molecular etiology and clinical presentation. Although, the role of visceral adipose tissue in the pathogenesis of insulin resistance and T2D is well known, only a limited information is available on the role of peripheral subcutaneous adipose tissue especiallyin Asian Indians. In this microarray based study of diabetic and normal glucose tolerant (NGT) Asian Indians, we generated the transcription profile of their thigh subcutaneous adipose tissue and further analyzed the diffrentially expressed genes (DEGs) using weighted gene co-expression network analysis (WGCNA) approach. Through WGCNA, we identified the perturbed pathways implicated by these DEGs in relevant co-expression modules by using a topology-based enrichment method. We also attempted to link these pathways with known aspects of T2D pathophysiology in terms of their association with some of their intermediate traits, namely; clinical diagnosis of diabetes, adipocyte size, HOMA-B, and HOMA-R, glycated hemoglobin (Hb1Ac), insulin, glocose level, proinflamatory markers - TNF-α, IL-6, lipid profile markers - Very Low Density Lipids (VLDL), Low Density Lipids (LDL), High Density Lipids (HDL), and Non Esterified Fatty Acids (NEFA). It was observed in this study that several modules of co-expressed genes show an association with diabetes and some of its intermediate phenotypic traits mentioned above. Therefore, these findings suggest a role of peripheral subcutaneous adipose tissue in the pathophsiology of T2D in Asian Indians. Additionally, our study indicated that the peripheral subcutaneous adipose tissue in diabetics shows pathologic changes characterized by adipocyte hypertrophy and upregulation of inflammation related pathways.
Date Issued
2019-03-20
Date Acceptance
2019-03-05
Citation
Adipocyte, 2019, 8 (1), pp.125-136
ISSN
2162-3945
Publisher
Taylor & Francis
Start Page
125
End Page
136
Journal / Book Title
Adipocyte
Volume
8
Issue
1
Copyright Statement
© 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/30894049
Subjects
Asian Indians
Type 2 diabetes
peripheral adipose tissue
signaling pathway impact analysis
system biology
weighted gene co-expression network analysis
Publication Status
Published
Coverage Spatial
United States
Date Publish Online
2019-03-28