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The tetraspanin CD151-ARSA mutant inhibits angiogenesis via the YRSL sequence

Dan Peng1, Houjuan Zuo, Zhengxiang Liu

  • 1Department of Nuclear Medicine of Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China.

Molecular Medicine Reports
|January 8, 2013
PubMed

Insights

The CD151 YRSL motif is crucial for angiogenesis, regulating endothelial cell functions like proliferation and migration. This motif impacts PI3K/Akt and ERK pathways, revealing a new mechanism for CD151 in blood vessel formation.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Angiogenesis Research

Background:

  • Tetraspanin CD151 is vital for pathological and physiological angiogenesis.
  • The specific role of the CD151 YRSL sorting motif in in vitro vasculogenesis is not well understood.
  • Understanding CD151's signaling mechanisms is key to exploring its role in blood vessel formation.

Purpose of the Study:

  • To investigate the role of the CD151 YRSL sorting motif in in vitro vasculogenesis.
  • To elucidate the cellular signaling mechanisms regulated by CD151.
  • To determine how the YRSL motif influences CD151-mediated endothelial cell functions.

Main Methods:

  • Gene delivery of CD151 and a CD151-ARSA mutant into human umbilical vein endothelial cells (HUVECs).
  • Assessment of CD151 protein expression levels.
  • Evaluation of HUVEC proliferation, migration, and capillary network formation in vitro.
  • Analysis of PI3K, Akt, and ERK signaling pathway activation.

Main Results:

  • Both CD151 and CD151-ARSA gene delivery increased CD151 protein expression in HUVECs.
  • Overexpression of CD151 enhanced HUVEC proliferation, migration, and capillary network formation.
  • The CD151-ARSA mutant group showed decreased cell proliferation, migration, and capillary network formation compared to the CD151 group.
  • Activation of PI3K, Akt, and ERK signaling pathways was attenuated in the CD151-ARSA mutant group.

Conclusions:

  • The YRSL motif of CD151 is essential for CD151-induced angiogenesis.
  • CD151 regulates angiogenesis through the PI3K/Akt and ERK signaling pathways.
  • Vesicle trafficking mediated by the YRSL motif represents a novel mechanism for CD151 in regulating angiogenesis.

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