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  • Title: Smad anchor for receptor activation (SARA) in TGF-beta signaling.
    Author: Tang WB, Ling GH, Sun L, Liu FY.
    Journal: Front Biosci (Elite Ed); 2010 Jun 01; 2(3):857-60. PubMed ID: 20515759.
    Abstract:
    Smad anchor for receptor activation (SARA) is known as Smad cofactor that interacts directly with Smad2/3 and functions to recruit Smad2/3 to the TGF-beta receptor. SARA plays an essential role in TGF-beta-induced Smad2 activation and it may modulate TGF-beta signaling through regulating the balance between Smad2 and Smad3. SARA also functions as an anchor for catalytic subunit of protein phosphatase 1 (PP1c) and maybe involved in the dephosphorylation of TGF-beta type I receptor (TbetaR-I) mediated by Smad7. The expression of SARA changes as the development of epithelial to mesenchymal transition (EMT) and fibrosis and it plays a critical role in the maintenance of epithelial cell phenotype. Modulation of SARA may provide a new therapeutic approach to TGF-beta-mediated EMT and fibrosis.
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