Effects of gut peptides on the activation of mast cells from rat intestinal mucosa in vitro / 中国免疫学杂志

ABSTRACT

Objective:To investigate the effects of substance P(SP),somatostain(SST) and vasoactive intestinal peptide(VIP) on the activation of rat intestinal mucosal mast cells(IMMC) in vitro.Methods:IMMC isolated and purified from the whole intestines of normal rats were incubated with gut peptides at various concentrations.The histamine concentration in IMMC and their supernate were determined.Furthermore,the ultrastructure of the incubated IMMC was observed under a transmission electronic microscope.Results:①The spontaneous release rate of histamine was (22.86?3.22)%.②SP significantly increased the histamine release rate from IMMC(P0.05)④At the concentration from 1?10 -1 mol/L to 1?10 -8 mol/L,the higher concentration of VIP was used,the lower histamine release rate was observed(P