Recognizes endogenous levels of Integrin alpha 11 protein.
Integrin ?11, also known as type I collagen receptor, is a single-pass type I transmembrane protein that mediates cell-matrix adhesion and is part of the family of integrins that play a pivotal role in regulation processes of cell proliferation, differentiation, migration, tumor invasion, and metastasis. Integrin ?11 is highly expressed in embryonic fibroblasts and myofibroblasts and to varying degrees in the cytoplasm of most human tissues. In non-small cell lung cancers, integrin ?11 overexpression correlates with tumorigenicity and formation of secondary metastatic lesions by increasing the migration and invasion capacity. TGF? activation of integrin ?11 results in significant upregulation and overexpression by cancer associated fibroblasts in the tumor stroma; therefore, it has been used as a prognostic marker in certain cancers. As a receptor for type I collagen, which is found in fibrotic tissue of the liver, lung, and kidney, integrin ?11 colocalizes with ?-smooth muscle actin. Type I collagen is the most abundant form in the body, indicating a role for targeting integrin ?11 in the therapeutic intervention of fibrotic disease.
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