Sci Rep:泌尿道上皮细胞中嘌呤能受体调控的钙离子信号研究

2019-11-25 AlexYang MedSci原创

膀胱拉伸过程中尿道上皮释放的非神经元ATP是膀胱机械感应的关键调控因子。非神经元ATP能够作用于膀胱传入神经来促进膀胱的感知功能,同时ATP也有可能以自分泌的方式来调节尿道上皮细胞的功能。最近,有研究人员系统性的鉴定了原代小鼠尿路上皮细胞(PMUCs)对ATP的功能性响应情况。研究人员从雄性小鼠中分离出了PMUCs细胞用于活细胞荧光钙离子成像,并使用qRT-PCR确定了P2X和P2Y受体的表达情况

膀胱拉伸过程中尿道上皮释放的非神经元ATP是膀胱机械感应的关键调控因子。非神经元ATP能够作用于膀胱传入神经来促进膀胱的感知功能,同时ATP也有可能以自分泌的方式来调节尿道上皮细胞的功能。

最近,有研究人员系统性的鉴定了原代小鼠尿路上皮细胞(PMUCs)对ATP的功能性响应情况。研究人员从雄性小鼠中分离出了PMUCs细胞用于活细胞荧光钙离子成像,并使用qRT-PCR确定了P2X和P2Y受体的表达情况。研究发现,大多数PMUCs(74-92%)细胞对ATP有响应(1μM-1mM),该响应情况是通过细胞内钙离子(iCa2+)的增加来证明。PMUCs在含有钙离子(2mM, EC50=3.49±0.77μM)和不含有钙离子(0mM, EC50=9.5±1.5μM)的缓冲液中对ATP表现出了剂量依赖的响应(10nM-1mM)。然而,重复使用含有钙离子的缓冲液显著减弱了iCa2+对ATP的响应,而在不患有钙离子的缓冲液中不存在上述情况。qRT-PCR阐释了P2X1-6、P2Y1-2、P2Y4、P2Y6、P2Y11-14在PMUCs中表达,而P2x7不在PMUCs中表达。

最后,研究人员指出,他们的发现阐释了ATP诱导的iCa2+增加主要是通过钙离子在细胞内存储器中的释放来调节的,表明了P2Y受体在PMUCs中广泛的表达。

原始出处:

Chess-Williams R, Sellers DJ, Brierley SM et al. Purinergic receptor mediated calcium signalling in urothelial cells. Sci Rep. 06 Nov 2019

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    2020-08-29 lifestar
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