15-PGDH抑制可使衰老肌肉恢復活力
作者:
小柯機器人發布時間:2020/12/12 20:16:32
美國斯坦福醫學院H. M. Blau團隊取得最新進展。他們表明抑制前列腺素降解酶15-PGDH可使衰老的肌肉質量和力量恢復活力。相關論文於2020年12月10日發表在《科學》雜誌上。
他們發現升高的15-PGDH(前列腺素E2(PGE2)降解酶)是包括骨骼肌在內的衰老組織的標誌。PGE2信號轉導的減少是衰老小鼠肌肉萎縮的主要原因,這是由表達15-PGDH的肌纖維和肌肉中的間質細胞引起的。通過靶向基因敲除或小分子抑制劑抑制15-PGDH可以增加衰老的肌肉質量、力量和運動表現。
這些生理益處來自恢復活力的PGE2水平,PGE2水平增強線粒體功能和自噬,並降低TGF-β和泛素-蛋白酶體途徑。他們的研究證明了PGE2信號在對抗肌肉萎縮方面以前未被認識的作用,並確定15-PGDH是對抗肌肉減少症的潛在治療靶標。
據介紹,肌肉減少症治療方法較少,肌肉減少症是與衰老有關的骨骼肌消耗綜合症。
附:英文原文
Title: Inhibition of prostaglandin-degrading enzyme 15-PGDH rejuvenates aged muscle mass and strength
Author: A. R. Palla, M. Ravichandran, Y. X. Wang, L. Alexandrova, A. V. Yang, P. Kraft, C. A. Holbrook, C. M. Schürch, A. T. V. Ho, H. M. Blau
Issue&Volume: 2020/12/10
Abstract: Treatments are lacking for sarcopenia, a debilitating age-related skeletal muscle wasting syndrome. Here we identify elevated 15-PGDH, the Prostaglandin E2 (PGE2)–degrading enzyme, as a hallmark of aged tissues, including skeletal muscle. The resulting reduction in PGE2 signaling is a major contributor to muscle atrophy in aged mice and results from 15-PGDH-expressing myofibers and interstitial cells within muscle. Inhibition of 15-PGDH, by targeted genetic knockdown or a small molecule inhibitor, increases aged muscle mass, strength, and exercise performance. These physiological benefits arise from rejuvenated PGE2 levels which augment mitochondrial function and autophagy and decrease TGF-beta and ubiquitin-proteasome pathways. Our studies demonstrate a previously unrecognized role for PGE2 signaling in countering muscle atrophy and identify 15-PGDH as a promising therapeutic target to counter sarcopenia.
DOI: 10.1126/science.abc8059
Source: https://science.sciencemag.org/content/early/2020/12/09/science.abc8059
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037