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Visceral adiposity and expression of clock genes in peripheral blood mononuclear cells: A pilot study

Authors
 Sue Kim  ;  Hye-Sun Lee  ;  Hyun-Ki Park  ;  John A. Linton  ;  Ji-Won Lee  ;  Hyangkyu Lee 
Citation
 Chronobiology International, Vol.34(8) : 1057-1066, 2017 
Journal Title
 Chronobiology International 
ISSN
 0742-0528 
Issue Date
2017
Keywords
Clock genes expression ; visceral adiposity ; visceral and subcutaneous fat tissues
Abstract
Increasing evidence suggests a close interrelationship between disrupted circadian rhythms and obesity and metabolic disturbances. In particular, abdominal obesity, which contributes to the pathogenesis of metabolic disease, is associated with disrupted clock gene expression. However, little is known about the relationship between clock gene expression and accurate computed tomography (CT)-based measurements of visceral adiposity. Therefore, we examined the relationship between expression of clock genes in peripheral blood mononuclear cells (PBMCs) with visceral and subcutaneous adiposity in 75 healthy overweight or obese individuals. PBMCs were obtained from blood samples collected at 8 AM, and gene expression was analyzed by real-time reverse transcription polymerase chain reaction. Visceral and subcutaneous adiposity were measured by CT. Our results showed that visceral fat area was significantly positively correlated with BMAL1 and CRY1 mRNA levels and significantly negatively correlated with CLOCK, PER2, PER3 and CRY2 mRNA levels. In contrast, subcutaneous fat area was not correlated with the expression of any of the clock genes analyzed. After adjusting for multiple variables, visceral fat area was significantly associated with the expression of BMAL1, PER2 and CRY1. Taken together, our results indicate that visceral adiposity, but not subcutaneous adiposity, correlates with expression of clock genes in PBMCs.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/161234
DOI
10.1080/07420528.2017.1337780
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Family Medicine (가정의학교실)
1. Journal Papers (연구논문) > 3. College of Nursing (간호대학) > Dept. of Nursing (간호학과)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원)
Yonsei Authors
김수(Kim, Sue) ; 이지원(Lee, Ji Won) ; 이향규(Lee, Hyang Kyu) ; 이혜선(Lee, Hye Sun) ; 인요한(Linton, John A.)
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Full Text
https://www.tandfonline.com/doi/full/10.1080/07420528.2017.1337780
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