異所性脂肪と2型糖尿病・心臓血管病

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  • Ectopic fat deposition, type 2 diabetes mellitus and cardiovascular diseases
  • イショセイ シボウ ト 2ガタ トウニョウビョウ シンゾウ ケッカンビョウ

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Abstract

There is evidence supporting the notion that excess abdominal fat is predictive of insulin resistance and the presence of related metabolic abnormalities currently referred to as the metabolic syndrome (MetS). Despite the fact that abdominal obesity is a highly prevalent feature of MetS, the mechanisms by which abdominal obesity is causally related to MetS are not fully elucidated. Besides visceral fat accumulation, ectopic lipid deposition, especially in the liver and skeletal muscle, has been implicated in the pathophysiology of diabetes, insulin resistance and obesity-related disorders. In addition, ectopic fat deposition play a critical role in the heart components such as (1) circulatory and locally recruited fat, (2) intra-and extra-myocellular fat, (3) perivascular fat, and (4) pericardial fat. In this review, the contribution of ectopic lipid deposition to global cardiometabolic risk is discussed via possible mechanisms including adipocytokine, insulin resistance and lipotoxicity.

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