Int Forum Allergy Rhinol:鼻粘膜中钙调蛋白和蛋白激酶A/G调节纤毛拨动响应

2019-10-13 AlexYang MedSci原创

气道上皮的粘液纤毛清除是粘膜防御功能的必要组成。之前,有研究人员提出了一个纤毛拨动的一个假定的机制,其中pannexin-1 (Panx1)-P2X7单元作为震荡器能够使得细胞内钙离子定期的增加。最近,有研究人员调查了Panx1和P2X7在超微结构中的定位,并调查了钙离子增加后的调控途径。研究人员在鼻内镜鼻窦手术期间,从慢性肥厚性鼻炎患者中收集了下鼻甲粘膜样本。之后,研究人员将粘膜用于透射免疫电镜

气道上皮的粘液纤毛清除是粘膜防御功能的必要组成。之前,有研究人员提出了一个纤毛拨动的一个假定的机制,其中pannexin-1 (Panx1)-P2X7单元作为震荡器能够使得细胞内钙离子定期的增加。最近,有研究人员调查了Panx1和P2X7在超微结构中的定位,并调查了钙离子增加后的调控途径。

研究人员在鼻内镜鼻窦手术期间,从慢性肥厚性鼻炎患者中收集了下鼻甲粘膜样本。之后,研究人员将粘膜用于透射免疫电镜观察,从而定位Panx1和P2X7。研究发现,Panx1和P2X7的免疫活性定位在整个纤毛的质膜上。CBF在100微摩尔乙酰胆碱(Ach)的处理下显著增加。Ach诱导的CBF增加在钙调蛋白拮抗剂卡米达佐、SQ22536(腺苷酸环化酶抑制剂)、ODQ(鸟苷酸环化酶抑制剂)、KT5720(蛋白激酶A抑制剂)和KT5823(蛋白激酶G抑制剂)的作用下显著被抑制。另外,氟二硝基苯(肌酸激酶抑制剂)能够完全的抑制纤毛拨动,并且是时间和剂量依赖的方式。

最后,研究人员指出,他们的结果表明了Panx1和P2X7共存在鼻上皮细胞的纤毛中,并且纤毛拨动是受钙离子、腺苷酸/鸟苷环化酶和蛋白激酶A/G的调控,并且严重的依赖肌酸激酶。

原始出处:

Do BH, Nguyen TN, Baba R et al. Calmodulin and protein kinases A/G mediate ciliary beat response in the human nasal epithelium. Int Forum Allergy Rhinol. 01 Oct 2019

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    2020-04-01 jml2009
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    2019-10-15 膀胱癌
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    2019-10-15 redcrab