Journal
DIABETES METABOLIC SYNDROME AND OBESITY-TARGETS AND THERAPY
Volume 13, Issue -, Pages 1771-1784Publisher
DOVE MEDICAL PRESS LTD
DOI: 10.2147/DMSO.S248352
Keywords
GWASs; adiponectin; Mendelian randomization; T2DM; glucose homeostasis
Categories
Funding
- National Natural Science Foundation of China [81770759]
- Major Project of Guangxi Innovation Driven [AA18118016]
- National Key Research and Development Program of China [2017 YFC0908000]
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Purpose: The associations of adiponectin with type 2 diabetes mellitus (T2DM), glucose homeostasis (including beta-cell function index (HOMA-beta), insulin resistance (HOMA-IR), fasting insulin (FI) and fasting glucose (FG)) have reported in epidemiological studies. However, the previous observational studies are prone to biases, such as reverse causation and residual confounding factors. Herein, a Mendelian Randomization (MR) study was conducted to determine whether causal effects exist among them. Materials and and Methods: Two-sample MR analyses and multiple sensitivity analyses were performed using the summary data from the ADIPOGen consortium, MAGIC Consortium, and a meta-analysis of GWAS with a considerable sample of T2DM (62,892 cases and 596,424 controls of European ancestry). We got eight valid genetic variants to predict the causal effect among adiponectin and T2DM and glucose homeostasis after excluding the probable invalid or pleiotropic variants. Results: Adiponectin was not associated with T2DM(odds ratio (OR) = 1.004; 95% confidence interval (CI): 0.740, 1.363) when using MR Egger after removing the invalid SNPs, and the results were consistent when using the other four methods. Similar results existed among adiponectin and HOMA-beta, HOMA-IR, FI, FG. Conclusion: Our MR study revealed that adiponectin had no causal effect on T2DM and glucose homeostasis and that the associations among them in observational studies may be due to confounding factors.
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