Connexin37, not Cx40 and Cx43, is induced in vascular smooth muscle cells during coronary arteriogenesis

Journal of Molecular and Cellular Cardiology
W J CaiJutta Schaper

Abstract

W.-J. Cai, S. Koltai, E. Kocsis, D. Scholz, W. Schaper and J. Schaper. Connexin37, not Cx40 and Cx43, is Induced in Vascular Smooth Muscle Cells During Coronary Arteriogenesis. Journal of Molecular and Cellular Cardiology (2001) 33, 957-967. The hypothesis that an altered expression of gap junction (GJ) proteins, connexin37 (Cx37), Cx40 and Cx43 will contribute to adaptive arteriogenesis was tested in growing coronary collateral vessels (CV) of the dog heart by immunoconfocal microscopy and transmission electron microscopy (TEM). We found that: (1) in the normal coronary system Cx37 and Cx40 were only expressed in endothelial cells (EC) from artery to capillary; (2) during collateral growth Cx37 was significantly induced in smooth muscle cells (SMC) from small-large arteries to precapillary arterioles (Ø=15 microm), while Cx40 was still only present in EC; (3) both homogeneous and heterogeneous distribution of Cx37 was observed in normal vessels (NV) and growing vessels (GV); (4) in mature vessels (MV), Cx37 was downregulated, similar to NV; (5) dual immunostaining revealed an inverse correlation between expression of Cx37 and desmin in GV occurring prior to downregulation of alpha-smooth actin and calponin; (6) Cx43 was undete...Continue Reading

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Citations

May 16, 2002·Journal of Cellular Physiology·Antonio De MaioJorge E Contreras
Feb 24, 2007·Journal of Molecular Medicine : Official Organ of the Gesellschaft Deutscher Naturforscher Und Ärzte·Marc Chanson, Brenda R Kwak
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