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International Journal of Endocrinology
Volume 2017 (2017), Article ID 8591986, 8 pages
https://doi.org/10.1155/2017/8591986
Research Article

BMI Modulates the Effect of Thyroid Hormone on Lipid Profile in Euthyroid Adults

1Shanghai National Clinical Research Center for Endocrine and Metabolic Diseases, Key Laboratory for Endocrine and Metabolic Diseases of Chinese Health Ministry, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
2Sino-French Research Center for Life Sciences and Genomics, Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200025, China

Correspondence should be addressed to Qidi Wang; moc.oohay@gnawidiq

Received 30 March 2017; Revised 26 May 2017; Accepted 8 June 2017; Published 13 August 2017

Academic Editor: Constantinos Pantos

Copyright © 2017 Yanqiu Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The impacts of thyroid hormones (TH) on lipid profile in euthyroid adults have gained much attention. It is currently unknown whether BMI influences such interaction. In the present study, we investigate the role of BMI in modulating the association between TH and lipid parameters in 1372 euthyroid healthy adults. Our results show that thyroid parameters are differentially associated with lipid profile. FT3 is positively correlated with total cholesterol (, ) and LDL cholesterol levels (, ). FT4 is negatively correlated with TG (, ) while positively correlated with HDL cholesterol levels (, ). TSH is positively associated with TG (, ) and total cholesterol levels (, ). Importantly, BMI modulates the effect of TH on lipid profile: the interaction of FT4 and BMI and the interaction of FT3 and BMI reach statistical significance in predicting TG and HDL cholesterol levels, respectively. Stratified according to BMI levels, most associations between TH and lipid profile are significant only in normal-weight group. In conclusion, in euthyroid adults, high normal FT3, TSH levels, and low normal FT4 levels are associated with unfavorable lipid profile. BMI mediates the effect of thyroid function on lipid profile in euthyroid adults.