Pituitary adenylate cyclase-activating peptide is a potent modulator of human colonic motility.

Pituitary adenylate cyclase-activating peptide is a potent modulator of human colonic motility.
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垂体腺苷酸环化酶激活肽是人类结肠运动的有效调节剂。

DOI:
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发表时间:
1993
影响因子:
1.9
通讯作者:
W. Schmidt
W. Schmidt
中科院分区:
医学4区
文献类型:
--
作者:
H. Schwörer;A. Clemens;S. Katsoulis;H. Köhler;W. Creutzfeldt;W. Schmidt

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腺苷酸环化酶激活肽(PACAP)是一种新的脑肠肽,与血管活性肠肽(VIP)具有高度同源性。由于已在人肠道中鉴定出PACAP,因此在体外测试了两种分子形式PACAP-(1-38)和PACAP-(1-27)、杂合PACAP-(1-23)VIP-(24-28)和VIP对人乙状结肠纵肌收缩性的影响。所有的肽抑制自发性阶段性收缩和放松浓度依赖性卡巴胆碱预收缩制剂。肽的作用不受河豚毒素、磷酸二酯酶活性抑制和一氧化氮合成抑制的影响。Apamin仅降低PACAP肽的作用,而四乙基铵仅阻断VIP的作用。总之,PACAP肽和VIP通过激活与不同钾通道偶联的特异性PACAP和VIP受体介导其舒张作用。
Pituitary adenylate cyclase-activating peptide (PACAP) represents a novel brain-gut peptide with high sequence homology to vasoactive intestinal polypeptide (VIP). Since PACAP has been identified in the human gut, the effect of the two molecular forms PACAP-(1-38) and PACAP-(1-27), the hybrid PACAP-(1-23)VIP-(24-28), and VIP on the contractility of the longitudinal muscle of human sigmoid colon was tested in vitro. All peptides inhibited the spontaneous phasic contractions and relaxed concentration-dependently carbachol-precontracted preparations. The effects of the peptides remained unaffected by tetrodotoxin, by inhibition of phosphodiesterase activity, and by inhibition of nitric oxide synthesis. Apamin reduced only the effects of the PACAP peptides, whereas tetraethylammonium blocked only the effect of VIP. In conclusion, PACAP peptides and VIP mediate their relaxant effects via activation of specific PACAP and VIP receptors coupled to different potassium channels.
VIP 诱导下食管括约肌中 cAMP 和磷酸肌醇的变化。
DOI: 10.1152/ajpgi.1990.259.2.g239
发表时间: 1990
期刊: The American journal of physiology
影响因子: --
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DOI: 10.1159/000200373
发表时间: 1990
期刊: Digestion
影响因子: 3.2
作者:
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