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. 1981 Sep;318:251–258. doi: 10.1113/jphysiol.1981.sp013862

Substance P: immunohistochemical localization and effect upon cat pial arteries in vitro and in situ.

L Edvinsson, J McCulloch, R Uddman
PMCID: PMC1245489  PMID: 6172582

Abstract

1. Nerve fibres containing substance P immunoreactivity were present in the adventitia and the adventitia-media border of all cat cerebral arteries which were examined. Substance P immunoreactivity was most abundant in cerebral arteries from the rostral portion of the circle of Willis. 2. Substance P effected a dose-dependent relaxation of feline middle cerebral arteries which had been contracted with prostaglandin F2 alpha. The maximum relaxation (16 +/- 0.3 mN) was achieved with substance P at a concentration of 10-6 M. 3. In cats anaesthetized with alpha-chloralose, the perivascular microinjection of substance P effected dose-dependent increases in arteriolar calibre. The maximum increase in calibre (19 +/- 3%) was observed following the injection of 10(-6) M-substance P.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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