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| Item Type: | Article |
|---|---|
| Title: | The Src Homology and Collagen A (ShcA) adaptor protein is required for the spatial organization of the costamere/Z-disk network during heart development |
| Creators Name: | Mlih, M. and Host, L. and Martin, S. and Niederhoffer, N. and Monassier, L. and Terrand, J. and Messaddeq, N. and Radke, M. and Gotthardt, M. and Bruban, V. and Kober, F. and Bernard, M. and Canet-Soulas, E. and Abt-Jijon, F. and Boucher, P. and Matz, R.L. |
| Abstract: | ShcA (Src Homology and Collagen A) is an adaptor protein that binds to tyrosine kinase receptors. Its germ line deletion is embryonic lethal with abnormal cardiovascular system formation, and its role in cardiovascular development is unknown. To investigate its functional role in cardiovascular development in mice, ShcA was deleted in cardiomyocytes and vascular smooth muscle cells by crossing ShcA flox mice with SM22a-Cre transgenic mice. Conditional mutant mice developed signs of severe dilated cardiomyopathy, myocardial infarctions, and premature death. No evidence of a vascular contribution to the phenotype was observed. Histological analysis of the heart revealed aberrant sarcomeric Z-disk and M-band structures, and misalignments of T-tubules with Z-disks. We find that not only the ErbB3/Neuregulin signaling pathway but also the baroreceptor reflex response, which have been functionally associated, are altered in the mutant mice. We further demonstrate that ShcA interacts with Caveolin-1 and the costameric protein plasma membrane Ca2+/calmodulin-dependent ATPase (PMCA), and that its deletion leads to abnormal dystrophin signaling. Collectively, these results demonstrate that ShcA interacts with crucial proteins and pathways that link Z-disk and costamere. |
| Keywords: | Adaptor Protein, Gene Knockout, Heart Development, Heart Failure, Molecular Biology, ErbB, ShcA, Z-Disks, Costamere, Animals, Mice, Rats |
| Source: | Journal of Biological Chemistry |
| ISSN: | 0021-9258 |
| Publisher: | American Society for Biochemistry and Molecular Biology |
| Volume: | 290 |
| Number: | 4 |
| Page Range: | 2419-2430 |
| Date: | 23 January 2015 |
| Official Publication: | https://doi.org/10.1074/jbc.M114.597377 |
| PubMed: | View item in PubMed |
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