Kinin B1 receptor: A target for neuroinflammation in hypertension.

Kinins are a family of oligopeptides of the kallikrein-kinin system that act as potent vasoactive hormones and inflammatory mediators. The bioactive kinins mainly consist of bradykinin and kallidin, and their metabolites des-Arg⁹-bradykinin and des-Arg¹⁰-kallidin. Physiological effects of kinins are mediated by activation of highly selective G-protein coupled kinin B1 and B2 receptors. Growing evidence suggests that B1 receptor activation mediates diverse physiological and pathological features of cardiovascular diseases. However, studies are limited regarding the impact of B1 receptor mediated neuroinflammation on the development of hypertension and other cardiovascular diseases. Given the potential role for B1 receptor activation in immune cell infiltration, microglia activation, and cytokine production within the central nervous system, B1 receptor mediated signaling cascades might result in elevated neuroinflammation. In this review, we will discuss the potential pro-inflammatory role of B1 receptor activation in hypertension. A better understanding of B1 receptor inflammatory signaling may lead to the development of therapeutics that target B1 receptors to treat neurogenic hypertension.

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