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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Neuropeptide Y: a new mediator linking sympathetic nerves, blood vessels and immune system?
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Neuropeptide Y: a new mediator linking sympathetic nerves, blood vessels and immune system?

机译:神经肽Y:连接交感神经,血管和免疫系统的新介体?

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Neuropeptide Y (NPY(1-36)), a sympathetic cotransmitter and neurohormone, has pleiotropic activities ranging from the control of obesity to anxiolysis and cardiovascular function. Its actions are mediated by multiple Gi/o-coupled receptors (Y1-Y5) and modulated by dipeptidyl peptidase IV (DPPIV/cd26), which inactivates NPY's Y1-agonistic activity but generates the Y2 and Y5-agonist, NPY(3-36). Released by sympathetic activity, NPY is a major mediator of stress, responsible for prolonged vasoconstriction via Y1 receptors. Y1 receptors also mediate NPY's potent vascular growth-promoting activity leading in vivo in rodents to neointima formation. This and the association of a polymorphism of the NPY signal peptide with increased lipidemia and carotid artery thickening in humans strongly suggest NPY's role in atherosclerosis. NPY and DPPIV/cd26 are also coexpressed in the endothelium, where the peptide activates angiogenesis. A similar system exists in immune cells, where NPY and DPPIV/cd26 are coactivatedand involved in the modulation of cytokine release and immune cell functions. Thus, NPY, both a messenger and a modulator for all three systems, is poised to play an important regulatory role facilitating interactions among sympathetic, vascular and immune systems in diverse pathophysiological conditions such as hypertension, atherosclerosis and stress-related alterations of immunity.
机译:神经肽Y(NPY(1-36))是一种交感神经递质和神经激素,具有多效性活动,范围从控制肥胖到抗焦虑和心血管功能。它的作用由多个Gi / o偶联受体(Y1-Y5)介导,并由二肽基肽酶IV(DPPIV / cd26)调节,该酶使NPY的Y1激动活性失活,但产生Y2和Y5激动剂NPY(3-36) )。 NPY是通过交感神经活动释放的,是压力的主要介质,负责通过Y1受体延长血管收缩。 Y1受体还介导NPY的有效血管生长促进活性,从而在啮齿动物体内导致新内膜形成。 NPY信号肽的多态性与人类血脂升高和颈动脉增厚的相关性强烈暗示了NPY在动脉粥样硬化中的作用。 NPY和DPPIV / cd26也可在内皮中共表达,其中该肽可激活血管生成。免疫细胞中存在类似的系统,其中NPY和DPPIV / cd26被共激活并参与细胞因子释放和免疫细胞功能的调节。因此,NPY既是这三个系统的信使,又是这三个系统的调节剂,它有望发挥重要的调节作用,促进交感神经,血管和免疫系统在多种病理生理状况(例如高血压,动脉粥样硬化和与压力相关的免疫力改变)之间相互作用。

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