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- W2048803991 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 μ m), 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 α -smooth actin and calponin; (6) Cx43 was undetectable in any vascular cells, both in NV and GV; (7) GJ were not found in SMC by TEM. Our data for the first time show the profile of connexin expression in the coronary system and provide evidence for existence of GJ proteins in capillaries. It is a novel finding that an altered expression of Cx37 is characteristic of adaptive arteriogenesis in the dog heart and may be used as a marker of vascular growth. Induced Cx37 may be an early signal indicating that SMC are responding to haemodynamic changes, i.e. increased shear stress." @default.
- W2048803991 created "2016-06-24" @default.
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- W2048803991 date "2001-05-01" @default.
- W2048803991 modified "2023-10-03" @default.
- W2048803991 title "Connexin37, not Cx40 and Cx43, is Induced in Vascular Smooth Muscle Cells During Coronary Arteriogenesis" @default.
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- W2048803991 doi "https://doi.org/10.1006/jmcc.2001.1360" @default.
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