肝細胞節律和進食調控多種類型肝細胞的時間生理學
作者:
小柯機器人發布時間:2020/8/2 23:24:19
美國賓夕法尼亞大學Mitchell A. Lazar及其研究小組發現,肝細胞節律和進食調控多種類型肝細胞的時間生理學。該項研究成果發表在2020年7月31日出版的《科學》雜誌上。
研究人員發現成年小鼠肝細胞中核心時鐘組分REV-ERBα和β的缺失破壞了部分肝基因的晝夜節律,並改變了新生脂肪形成的晝夜節律。肝功能還受到非肝細胞的影響,並且肝細胞REV-ERB的丟失重塑了肝內多種類型細胞的轉錄組和代謝組節律。
最後,食物供應量的變化印證了細胞內源性肝細胞時鐘機制和攝食環境的等級。總之,這些研究揭示了肝細胞時鐘在營養信號的生理協調和控制節律性代謝細胞間通訊中未知的作用。
研究人員表示,人體的大多數細胞都含有分子時鐘,但是尚不清楚節律對環境時鐘的需求及其對生理的影響。
附:英文原文
Title: The hepatocyte clock and feeding control chronophysiology of multiple liver cell types
Author: Dongyin Guan, Ying Xiong, Trang Minh Trinh, Yang Xiao, Wenxiang Hu, Chunjie Jiang, Pieterjan Dierickx, Cholsoon Jang, Joshua D. Rabinowitz, Mitchell A. Lazar
Issue&Volume: 2020/07/30
Abstract: Abstract Most cells of the body contain molecular clocks, but the requirement of peripheral clocks for rhythmicity, and their effects on physiology, are not well understood. Here we show that deletion of core clock components REV-ERBα and β in adult mouse hepatocytes disrupted diurnal rhythms of a subset of liver genes and altered the diurnal rhythm of de novo lipogenesis. Liver function is also influenced by non-hepatocytic cells, and the loss of hepatocyte REV-ERBs remodeled the rhythmic transcriptomes and metabolomes of multiple cell types within the liver. Finally, alteration of food availability demonstrated the hierarchy of the cell-intrinsic hepatocyte clock mechanism and the feeding environment. Together, these studies reveal previously unsuspected roles of the hepatocyte clock in the physiological coordination of nutritional signals and cell-cell communication controlling rhythmic metabolism.
DOI: 10.1126/science.aba8984
Source: https://science.sciencemag.org/content/early/2020/07/29/science.aba8984
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037