TY - T1的小说气道平滑muscle-mast细胞相互作用和角色TRPV4-ATP轴non-atopic哮喘JF -欧洲呼吸杂志》乔和J - 10.1183/13993003.01458 -2019欧元六世- 56 - 1 SP - 1901458 AU Bonvini莎拉J . AU -博雷尔Mark a . AU - Dubuis埃里克•AU -爱德考克(John J . AU -沃尔特利,Michael a . AU - Flajolet,波林盟,布拉德·皮特盟——BelvisiMaria G. Y1 - 2020/07/01 UR - //www.qdcxjkg.com/content/56/1/1901458.abstract N2 -肥大细胞-气道平滑肌(ASM)相互作用在哮喘中可见的免疫球蛋白(Ig)E依赖性支气管收缩中起主要作用,但对不依赖于ige的肥大细胞激活机制知之甚少。瞬时受体电位阳离子通道,亚家族V,成员4 (TRPV4)激活通过释放半胱氨酸白三烯(cyslt)引起人ASM收缩,但其机制尚不清楚。本研究的目的是探讨ige独立的肥大细胞- asm相互作用在trpv4诱导的支气管痉挛中的作用。在麻醉豚鼠中测量支气管收缩,并使用等距张力测量评估人和豚鼠气道组织的收缩。使用Ca2+敏感染料FURA2成像细胞内[Ca2+]的增加,并使用延时照相作为ASM细胞收缩的替代品。TRPV4拮抗剂GSK1016790A在豚鼠体内引起收缩,在人和豚鼠气管组织中,收缩被TRPV4拮抗剂GSK2193874抑制。GSK1016790A在人ASM细胞中增加[Ca2+]i并释放ATP而不引起收缩。TRPV4和ATP诱导离体气管组织收缩,但共培养实验表明需要人肺肥大细胞。表达谱分析和药理学研究表明,肥大细胞的激活依赖于ATP激活P2X4受体。 Trypsin was shown to evoke contraction of tracheal tissue via activation of PAR-2-TRPV4-ATP-cysLT axis indicating the potential disease relevance of this signalling pathway.TRPV4 activation increases [Ca2+]i and releases ATP from ASM cells triggering P2X4-dependent release of cysLTs from mast cells resulting in ASM contraction. This study delineates a novel mast cell–ASM interaction and TRPV4 as a driver of IgE-independent mast cell-dependent bronchospasm.A technique not previously applied to respiratory research now uncovers important IgE-independent mechanisms involved in human mast cell–airway smooth muscle interactions that may be responsible for the bronchospasm associated with non-atopic asthma http://bit.ly/2U1n5nT ER -