Karlsson J A, Persson C G
Br J Pharmacol. 1983 Jul;79(3):634-6. doi: 10.1111/j.1476-5381.1983.tb09999.x.
Propranolol-resistant neurogenic relaxation persisted in (carbachol-contracted) guinea-pig tracheae already relaxed by supramaximal concentrations of vasoactive intestinal polypeptide (VIP). Also, VIP relaxed preparations that were under neurogenic inhibition. In hilus bronchi, about 60% of a neurogenic contraction was atropine-resistant. (Arg5, D-Trp7.9) SP 5-11 specifically antagonized this contraction and those produced by exogenous substance P. Substance P, but not VIP, seems to be involved in nerve-mediated effects on guinea-pig airway tone.
在已被超最大浓度的血管活性肠肽(VIP)松弛的(卡巴胆碱收缩的)豚鼠气管中,普萘洛尔耐药性神经源性松弛持续存在。此外,VIP使处于神经源性抑制状态的标本松弛。在肺门支气管中,约60%的神经源性收缩对阿托品耐药。(Arg5,D-Trp7.9)SP 5-11特异性拮抗这种收缩以及由外源性P物质产生的收缩。P物质而非VIP似乎参与了对豚鼠气道张力的神经介导作用。