Role of neurokinin 1 receptors in dextran sulfate-induced colitis: studies with gene-deleted mice and the selective receptor antagonist netupitant
详细信息    查看全文
文摘
Objective and design The function of the neurokinin 1 (NK1) receptor was investigated in the DSS-induced mouse colitis model using NK1 receptor-deficient mice and the selective antagonist netupitant. Subjects Colitis was induced by oral administration of 20?mg/ml DSS solution for 7?days in C57BL/6 and Tacr1 KO animals (n?=?5-). Treatment During the induction, one-half of the C57BL/6 and Tacr1 KO group received one daily dose of 6?mg/kg netupitant, administered intraperitoneally, the other half of the group received saline, respectively. Methods Disease activity index (DAI), on the basis of stool consistency, blood and weight loss, was determined over 7?days. Histological evaluation, myeloperoxidase (MPO) measurement, cytokine concentrations and receptor expression analysis were performed on the colon samples. Results NK1 receptors are up-regulated in the colon in response to DSS treatment. DSS increased DAI, histopathological scores, BLC, sICAM-1, IFN-γ, IL-16 and JE in wildtype mice, which were significantly reduced in NK1 receptor-deficient ones. NK1 receptor antagonism with netupitant significantly diminished DAI, inflammatory histopathological alterations, BLC, IFN-γ, IL-13 and IL-16 in wildtype mice, but not in the NK1-deficient ones. MPO was similarly elevated and netupitant significantly decreased its activity in both groups. Conclusions NK1 receptor antagonism could be beneficial for colitis via inhibiting different inflammatory mechanisms.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700