iScience (Nov 2023)

Syndecan-1 shedding destroys epithelial adherens junctions through STAT3 after renal ischemia/reperfusion injury

  • Man Guo,
  • Daoqi Shen,
  • Yiqi Su,
  • Jiarui Xu,
  • Shuan Zhao,
  • Weidong Zhang,
  • Yaqiong Wang,
  • Wuhua Jiang,
  • Jialin Wang,
  • Xuemei Geng,
  • Xiaoqiang Ding,
  • Xialian Xu

Journal volume & issue
Vol. 26, no. 11
p. 108211

Abstract

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Summary: Adherens junctions between tubular epithelial cells are disrupted in renal ischemia/reperfusion (I/R) injury. Syndecan-1 (SDC-1) is involved in maintaining cell morphology. We aimed to study the role of SDC-1 shedding induced by renal I/R in the destruction of intracellular adherens junctions. We found that SDC-1 shedding was increased while the expression of E-cadherin was decreased. This observation was accompanied by the activation of STAT3 in the kidneys. Inhibiting the shedding of SDC-1 induced by I/R could alleviate this effect. Mild renal I/R could induce more severe renal injury, lower E-cadherin expression, damaged cell junctions, and activated STAT3 in knockout mice with the tubule-specific deletion of SDC-1 mice. The results in vitro were consistent with those in vivo. Inhibiting the shedding of SDC-1 could alleviate the decreased expression of E-cadherin and damage of cell adherens junctions through inhibiting the activation of STAT3 during ischemic acute kidney injury.

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