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. 1985 Dec;86(4):855–860. doi: 10.1111/j.1476-5381.1985.tb11107.x

Inflammatory oedema induced by synergism between calcitonin gene-related peptide (CGRP) and mediators of increased vascular permeability.

S D Brain, T J Williams
PMCID: PMC1916626  PMID: 2416378

Abstract

The potent vasodilator calcitonin gene-related peptide (CGRP, human synthetic), when mixed with histamine and injected intradermally in the rabbit, induced a marked potentiation of local oedema. CGRP also potentiated oedema induced by other mediators of increased microvascular permeability in the rabbit; bradykinin, platelet-activating factor (Paf), C5a des Arg, N-formylmethionyl-leucyl-phenylalanine (FMLP) and leukotriene B4 (LTB4). Substance P alone, or mixtures of substance P and CGRP, failed to induce oedema in rabbit skin. In rat skin, however, substance P induced oedema and this was potentiated by CGRP. CGRP had a protracted potentiating action following intradermal injection in the rabbit. The time for half loss of activity for CGRP was 40.1 +/- 7.5 min compared to 18 +/- 1 min for prostaglandin E2 (PGE2). No loss of potentiating activity was detected after incubation of CGRP in rabbit plasma or blood for 60 min. We postulate that endogenous CGRP, if released locally from nerve endings, could have a marked enhancing effect on oedema induced by other mediators in an inflammatory reaction.

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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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