Substance P as a potent stimulator of sneeze responses in experimental allergic rhinitis of guinea pigs
- 1 November 1992
- journal article
- research article
- Published by Springer Nature in Inflammation Research
- Vol. 37 (3-4) , 245-249
- https://doi.org/10.1007/bf02028116
Abstract
Substance P was examined for sneeze-inducing activity and its involvement of sneeze responses in experimental allergic rhinitis. Substance P, dripped into a nostril of guinea pigs, at concentrations of 100 pM and above induced sneezing in a dose-dependent fashion. The activity of substance P was not affected by the previous subcutaneous injections of capsaicin that depleted substance P in nerve fibers. Histamine induced sneezing at concentrations of 30 mM and above and the activity was reduced by capsaicin treatment. The frequency of antigen-induced sneezing was proportional to the substance P content in nasal mucosa of sensitized guinea pigs treated with increasing doses of capsaicin; correlation coefficient 0.91. These results suggest that substance P plays an important role as a stimulator of sneeze responses in experimental allergic rhinitis in guinea pigs.Keywords
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