Adherens junctions influence tight junction formation via changes in membrane lipid composition

Kenta Shigetomi, Yumiko Ono, Tetsuichiro Inai, Junichi Ikenouchi

研究成果: Contribution to journalArticle

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Tight junctions (TJs) are essential cell adhesion structures that act as a barrier to separate the internal milieu from the external environment in multicellular organisms. Although their major constituents have been identified, it is unknown how the formation of TJs is regulated. TJ formation depends on the preceding formation of adherens junctions (AJs) in epithelial cells; however, the underlying mechanism remains to be elucidated. In this study, loss of AJs in α-catenin-knockout (KO) EpH4 epithelial cells altered the lipid composition of the plasma membrane (PM) and led to endocytosis of claudins, a major component of TJs. Sphingomyelin with long-chain fatty acids and cholesterol were enriched in the TJ-containing PM fraction. Depletion of cholesterol abolished the formation of TJs. Conversely, addition of cholesterol restored TJ formation in α-catenin-KO cells. Collectively, we propose that AJs mediate the formation of TJs by increasing the level of cholesterol in the PM.

元の言語英語
ページ(範囲)2373-2381
ページ数9
ジャーナルJournal of Cell Biology
217
発行部数7
DOI
出版物ステータス出版済み - 7 2018

All Science Journal Classification (ASJC) codes

  • Cell Biology

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