Curtailed CaSR expression in peripheral blood mononuclear cells is associated with hypertension
Bank, S.; Sarkar, K.; Chatterjee, A.; Das, A.; Chakraborty, S.; Malakar, S.; Pal, D.; Karmakar, S.; De, S.; Arumugam, S.; Das, M.
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The calcium-sensing receptor (CaSR) is a GPCR family member. CaSR is abundantly expressed in the parathyroid gland and controls calcium homeostasis. There are no particular discoveries involving CaSR expression in hypertensive peripheral blood mononuclear cells. We investigated lower CaSR expression in hypertensive human and animal models. Nitric oxide (NO) has an important role in vascular function. Impaired NO production disrupts CaSR-mediated fine adjustment of the intra- and extracellular [Ca2+] gradients. According to the law Ca2+ transportation through Ca channels maintains its connection from the circulatory micro-vascular bed to interstitial space, influenced by capillary and interstitial fluid hydrostatic pressure, as well as oncotic pressure. In that situation, the alterations in Ca2+ microenvironment and dynamics remain unknown. CaSR on circulatory mononuclear cells may detect changes in the Ca2+ microenvironment in the ISF of endothelial cells-VSMC and endothelium lining in hypertension. In this experiment, the decreased expression of CaSR revealed a molecular sensor in the presence of elevated blood pressure.
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