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https://www.selleckchem.com/ However, increased collagen I/III synthesis, cardiac fibrosis, and lung congestion observed in Ang II mice were inhibited by BRL treatment. The cardioprotective benefits of BRL were associated with downregulation of transforming growth factor-β1 expression and phosphorylated-Smad2/3. Chronic infusion of a β3-agonist has a beneficial effect on LV diastolic function independent of blood pressure in the Ang II-induced cardiomyopathy mouse model. SIGNIFICANCE STATEMENT Chronic infusion of a β3-adrenergic receptor agonist attenuates cardiac fibrosis and improves diastolic dysfunction independently of blood pressure in an angiotensin II-induced hypertensive mouse model. This drug might be an effective treatment of heart failure with preserved ejection fraction.The arginyl-glycinyl-aspartic acid (RGD) integrin alpha-v beta-6 (αvβ6) has been identified as playing a key role in the activation of transforming growth factor-β (TGFβ) that is hypothesized to be pivotal in the development of fibrosis and other diseases. In this study, αvβ6 small molecule inhibitors were characterized in a range of in vitro systems to determine affinity, kinetics, and duration of TGFβ inhibition. High αvβ6 binding affinity was shown to be correlated with slow dissociation kinetics. Compound 1 (high αvβ6 affinity, slow dissociation) and SC-68448 (low αvβ6 affinity, fast dissociation) induced concentration- and time-dependent internalization of αvβ6 in normal human bronchial epithelial (NHBE) cells. After washout, the αvβ6 cell surface repopulation was faster for SC-68448 compared with compound 1 In addition, αvβ6-dependent release of active TGFβ from NHBE cells was inhibited by compound 1 and SC-68448. After washout of SC-68448, release of active TGFβ was restored, whereas after washout of cined low affinity ligand engagement was only able to decrease αvβ6 expression over longer periods of time. Our study provides a potential unique mechanism for obtaining duration of a

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