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논문 기본 정보

자료유형
학술저널
저자정보
Oh Soo-Jin (Soonchunhyang Institute of Medi-bio Science and Division of Endocrinology Department of Internal Me) Lee Myung-Shik (Soonchunhyang Institute of Medi-bio Science and Division of Endocrinology Department of Internal Me)
저널정보
대한의학회 Journal of Korean Medical Science Journal of Korean Medical Science Vol.37 No.37
발행연도
2022.9
수록면
1 - 17 (17page)
DOI
10.3346/jkms.2022.37.e276

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초록· 키워드

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Autophagy is critically involved in the maintenance of intracellular nutrient homeostasis and organelle function. Dysregulated autophagy is likely to play a role in the development of metabolic disorders and diabetes because autophagy is critical in the rejuvenation of dysfunctional or stressed endoplasmic reticulum and mitochondria that play a crucial role in the development of diabetes. Indeed, systemic autophagy insufficiency led to the increased tissue lipid content, aggravated metabolic and finally more severe diabetes when metabolic stress was imposed, suggesting that autophagy insufficiency of dysfunction of lysosome, an effector organelle of autophagy, due to aging, genetic predisposition or environmental factors could be an underlying cause of diabetes. Conversely, autophagy enhancer could improve metabolic profile of obese mice by reducing tissue lipid content and ameliorating metabolic inflammation. Furthermore, clearance of human islet amyloid polypeptide (hIAPP) oligomer and amyloid that accumulate in pancreatic islets of > 90% of diabetes patients was also dependent on autophagy. Consistently, autophagy enhancer could improve glucose profile and β-cell function of transgenic mice expressing amyloidogenic hIAPP in pancreatic β-cells, which was accompanied by reduced accumulation of hIAPP oligomer or amyloid, ameliorated β-cell apoptosis and increased β-cell mass. These results suggest that autophagy enhancer could be a novel therapeutic modality against diabetes associated with lipid overload and human diabetes characterized by islet amyloid accumulation.

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