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Janovsky CCPS, Generoso G, Goulart AC, Santos RD, Blaha MJ, Jones S, Toth PP, Lotufo PA, Bittencourt MS, Benseñor IM. Differences in HDL particle size in the presence of subclinical thyroid dysfunctions: The ELSA-Brasil study. Atherosclerosis 2020; 312:60-65. [PMID: 32977122 DOI: 10.1016/j.atherosclerosis.2020.08.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/18/2020] [Accepted: 08/26/2020] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND AIMS Thyroid dysfunction is related to several lipid abnormalities. There is no consensus about concentration of high-density lipoprotein (HDL) in different studies. The aim of this report is to evaluate HDL particle (HDL-P) subfractions across a spectrum of thyroid functions in a Brazilian population. METHODS Individuals were divided into three groups by baseline thyroid function (subclinical hypothyroidism, euthyroidism, and subclinical hyperthyroidism). HDL-P subfractions were analyzed by Nuclear Magnetic Resonance (NMR) spectroscopy. To examine the association between HDL-P subfractions and thyroid function, we used univariate and multivariate linear regression models adjusted for demographic characteristics, comorbidities, lifestyle factors, and traditional lipid measurement (HDL-C, LDL-C and triglycerides). RESULTS Of 3304 participants, 54.1% were women, 51.2% white, with mean age 50.6 ± 8.7 years. HDL-C and triglycerides levels (p = 0.032 and p = 0.016, respectively) were higher in the SC hypothyroid group. There were no statistically significant differences in total cholesterol levels and LDL-C levels. In univariate analysis, small HDL-P subfractions were significantly lower in subclinical hypothyroidism (p = 0.026) whereas intermediate HDL-P were higher in subclinical hyperthyroidism (p = 0.049), compared to euthyroidism. After adjustment for demographic data, SC hypothyroidism was still statistically associated with lower levels of small HDL-P. After adjusting for comorbidities, lifestyle factors, and traditional lipid measurements, SC hypothyroidism had an established association with lower levels of small HDL-P while SC hyperthyroidism was associated with lower levels of large HDL-P. CONCLUSIONS In this large cohort from a Brazilian population, subclinical hypothyroidism was associated with lower small HDL-P subfractions, and subclinical hyperthyroidism with lower large HDL-P subfractions and higher intermediate HDL-P subfractions.
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Affiliation(s)
| | - Giuliano Generoso
- Center for Clinical and Epidemiological Research, Hospital Universitário, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Alessandra C Goulart
- Center for Clinical and Epidemiological Research, Hospital Universitário, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Raul D Santos
- Lipid Clinic Heart Institute (InCor) University of Sao Paulo, Medical, School Hospital, Sao Paulo, Brazil
| | - Michael J Blaha
- Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Baltimore, USA
| | - Steven Jones
- Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Baltimore, USA
| | - Peter P Toth
- Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Baltimore, USA; Department of Preventive Cardiology, CGH Medical Center, Sterling, IL, USA
| | - Paulo A Lotufo
- Center for Clinical and Epidemiological Research, Hospital Universitário, Universidade de Sao Paulo, Sao Paulo, SP, Brazil; Department of Internal Medicine, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.
| | - Marcio Sommer Bittencourt
- Center for Clinical and Epidemiological Research, Hospital Universitário, Universidade de Sao Paulo, Sao Paulo, SP, Brazil; Hospital Israelita Albert Einstein & School of Medicine, Faculdade Israelita de Ciência da Saúde Albert Einstein, São Paulo, Brazil
| | - Isabela M Benseñor
- Center for Clinical and Epidemiological Research, Hospital Universitário, Universidade de Sao Paulo, Sao Paulo, SP, Brazil; Department of Internal Medicine, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil.
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