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Loss of lung microvascular endothelial Piezo2 expression impairs NO synthesis, induces EndMT and is associated with pulmonary hypertension
Am J Physiol Heart Circ Physiol. 2022 Sep 23. doi: 10.1152/ajpheart.00220.2022. Online ahead of print.ABSTRACTMechanical forces are translated into biochemical stimuli by mechanotransduction channels, such as the mechanically-activated cation channel Piezo2. Lung Piezo2 expression has recently been shown to be restricted to endothelial cells. Hence, we aimed to investigate the role of Piezo2 in regulation of pulmonary vascular function and structure as well as its contribution to development of pulmonary arterial hypertension (PAH). The expression of Piezo2 was significantly reduced in pulmonary microvascular endothelial c...
Source: American Journal of Physiology. Heart and Circulatory Physiology - September 23, 2022 Category: Physiology Authors: Siyu Tian Zongye Cai Payel Sen Denise van Uden Esther van de Kamp Raphael Thuillet Ly Tu Christophe Guignabert Karin Boomars Kim Van der Heiden Maarten M Brandt Daphne Merkus Source Type: research

Angiotensin II -induced overexpression of Sirtuin-1 contributes to enhanced expression of Gi α proteins and hyperproliferation of vascular smooth muscle cells
Am J Physiol Heart Circ Physiol. 2021 Jul 16. doi: 10.1152/ajpheart.00898.2020. Online ahead of print.ABSTRACTAngiotensin II (Ang II) plays an important role in the regulation of various physiological functions including proliferation, hypertrophy of vascular smooth muscle cells (VSMC) through the overexpression of Giα proteins. Sirtuin1 (Sirt1), a class III histone deacetylase and epigenetic regulator is implicated in a wide range of cellular functions, including migration and growth of VSMC as well as in Ang II-induced hypertension. The present study was undertaken to examine the role of Sirt1 in Ang II-induced overexpr...
Source: American Journal of Physiology. Heart and Circulatory Physiology - July 16, 2021 Category: Physiology Authors: Ekhtear Hossain Yuan Li Madhu B Anand-Srivastava Source Type: research

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