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논문 기본 정보

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학술저널
저자정보
이주희 (충남대학교) 정샛별 (충남대학교) 이성은 (충남대학교) 김지은 (충남대학교) 김정태 (충남대학교) 강예은 (충남대학교) 강슬기 (Research Center for Endocrine and Metabolic Diseases Chungnam National University Korea) 이현승 (충남대학교) 고영복 (충남대학교) 이기환 (충남대학교병원 산부인과) 구본정 (충남대학교) 송민호 (충남대학교) 김현진 (충남대학교)
저널정보
대한내분비학회 Endocrinology and Metabolism Endocrinology and Metabolism Vol.36 No.3
발행연도
2021.1
수록면
661 - 671 (11page)

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Background: The nature and role of the mitochondrial stress response in adipose tissue in relation to obesity are not yet known. To determine whether the mitochondrial unfolded protein response (UPRmt) in adipose tissue is associated with obesity in humans and rodents. Methods: Visceral adipose tissue (VAT) was obtained from 48 normoglycemic women who underwent surgery. Expression levels of mRNA and proteins were measured for mitochondrial chaperones, intrinsic proteases, and components of electron-transport chains. Furthermore, we systematically analyzed metabolic phenotypes with a large panel of isogenic BXD inbred mouse strains and Genotype-Tissue Expression (GTEx) data. Results: In VAT, expression of mitochondrial chaperones and intrinsic proteases localized in inner and outer mitochondrial membranes was not associated with body mass index (BMI), except for the Lon protease homolog, mitochondrial, and the corresponding gene LONP1, which showed high-level expression in the VAT of overweight or obese individuals. Expression of LONP1 in VATpositively correlated with BMI. Analysis of the GTEx database revealed that elevation of LONP1 expression is associated with enhancement of genes involved in glucose and lipid metabolism in VAT. Mice with higher Lonp1 expression in adipose tissue had better systemic glucose metabolism than mice with lower Lonp1 expression. Conclusion: Expression of mitochondrial LONP1, which is involved in the mitochondrial quality control stress response, was elevated in the VAT of obese individuals. In a bioinformatics analysis, high LONP1 expression in VAT was associated with enhancedglucose and lipid metabolism.

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