GSTpi protects against angiotensin II-induced proliferation and migration of vascular smooth muscle cells by preventing signal transducer and activator of transcription 3 activation
2014 (English)In: Biochimica et Biophysica Acta. Molecular Cell Research, ISSN 0167-4889, Vol. 1843, no 2, 454-463 p.Article in journal (Refereed) Published
Angiotensin II (Ang II)-elicited excessive proliferation, hypertrophy and migration of vascular smooth muscle cells (VSMCs) are vital to the pathogenesis of atheroclerosis. Glutathione S-transferase pi (GSTpi) exists extensively in various kinds of cells and protects cells against different stresses. However, knowledge remains limited about what GSTpi acts in VSMCs. We investigated the effect of GSTpi on Ang II-induced VSMC proliferation, hypertrophy and migration and its latent mechanism. Overexpression and RNAi experiments demonstrated that GSTpi inhibited Ang II-induced proliferation, hypertrophy and migration of VSMCs and arrested progression of cell cycle from G0/G1 to S phase. Immunoprecipitation, mass spectrometry and confocal microscopy analyses showed that GSTpi directly associated with signal transducer and activator of transcription 3 (STAT3) to prevent Ang II-triggered binding of Src to STAT3 and thus suppressed Ang II-stimulated phosphorylation and nuclear translocation of STAT3, as well as cyclin D1 expression. In contrast, GSTpi didn't affect Ang II-activated extracellular signal-regulated kinase (ERK1/2). GSTpi acts as a negative regulator to prevent Ang II-triggered proliferative signaling in VSMCs, suggesting that it may protect vessels against the stresses associated with atherosclerosis formation.
Place, publisher, year, edition, pages
2014. Vol. 1843, no 2, 454-463 p.
Angiotensin II, Glutathione S-transferase pi, Signal transducer and activator of transcription 3, Vascular smooth muscle cells
Biochemistry and Molecular Biology Cell Biology
IdentifiersURN: urn:nbn:se:kth:diva-140812DOI: 10.1016/j.bbamcr.2013.11.024ISI: 000330606400021ScopusID: 2-s2.0-84890835939OAI: oai:DiVA.org:kth-140812DiVA: diva2:693286
QC 201402042014-02-042014-01-312014-03-06Bibliographically approved