Pivotal role of integrin α5β1 in hypotonic stress-induced responses of human endothelium

Masakazu Hirakawa, Masahiro Oike, Michi Watanabe, Yuji Karashima, Yushi Ito

研究成果: ジャーナルへの寄稿記事

15 引用 (Scopus)

抄録

We have previously reported that both hypotonic stress (HTS) and lysophosphatidic acid (LPA) induce ATP release and a transient reorganization of actin through sequential activation of RhoA/Rho-kinase and focal adhesion kinase F-actin (FAK)/paxillin in human umbilical cord vein endothelial cells (HUVECs). LPA is known to induce the activation of RhoA via its specific receptors, but the mechanisms by which HTS initiates these intracellular signals are not known. The present study aimed to identify the molecule(s) that are unique to the sensing and/or transducing the mechanical stress. Reverse transcriptase-polymerase chain reaction revealed the expression of several integrin subunits in HUVECs. Anti-integrin α5β1 antibody (Ab), but not anti-integrin α2, α6, αv, or β4 antibodies, inhibited HTS-induced RhoA translocation, tyrosine phosphorylation of FAK and paxillin, ATP release, and actin reorganization. However, the LPA-induced ATP release and actin reorganization were not inhibited by any of these anti-integrin antibodies, indicating that integrin α5β1 plays a pivotal role in the HTS-induced but not in the LPA-induced responses. It is therefore reasonable to assume that this particular subtype of integrin is involved in the initiation of the responses induced by mechanical stimuli in HUVECs.

元の言語英語
ページ(範囲)1992-1999
ページ数8
ジャーナルFASEB Journal
20
発行部数12
DOI
出版物ステータス出版済み - 10 1 2006

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Osmotic Pressure
Integrins
Endothelium
Actins
Umbilical Cord
Endothelial cells
Human Umbilical Vein Endothelial Cells
Paxillin
Adenosine Triphosphate
Antibodies
Anti-Idiotypic Antibodies
Chemical activation
Focal Adhesion Protein-Tyrosine Kinases
rho-Associated Kinases
Mechanical Stress
Phosphorylation
Polymerase chain reaction
RNA-Directed DNA Polymerase
Reverse Transcriptase Polymerase Chain Reaction
Tyrosine

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Genetics

これを引用

Pivotal role of integrin α5β1 in hypotonic stress-induced responses of human endothelium. / Hirakawa, Masakazu; Oike, Masahiro; Watanabe, Michi; Karashima, Yuji; Ito, Yushi.

:: FASEB Journal, 巻 20, 番号 12, 01.10.2006, p. 1992-1999.

研究成果: ジャーナルへの寄稿記事

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