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Int J Biochem Cell Biol. 1997 Jan;29(1):31-42.

Myofibroblasts and local angiotensin II in rat cardiac tissue repair.

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  • 1Department of Internal Medicine, University of Missouri Health Sciences Center, Columbia, USA.


Tissue repair is a fundamental property of vascularized tissue. At sites of injury, phenotypically transformed fibroblast-like cells are responsible for fibrous tissue formation, expressed principally as type I and III fibrillar collagens. These cells are termed myofibroblasts because they contain alpha-smooth muscle actin microfilaments and are contractile. In vivo studies of injured rat cardiac tissues and in vitro cell culture studies have shown that such fibroblast-like cells contain requisite components for angiotensin peptide generation and angiotensin II receptors. Such locally generated angiotensin II acts in an autocrine paracrine manner to regulate collagen turnover and thereby tissue homeostasis in injured tissue.

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