Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Skofitsch, G; Donnerer, J; Petronijevic, S; Saria, A; Lembeck, F.
Release of histamine by neuropeptides from the perfused rat hindquarter.
Naunyn Schmiedebergs Arch Pharmacol. 1983; 322(2):153-157
Doi: 10.1007/BF00512389
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- Co-Autor*innen der Med Uni Graz
- Donnerer Josef
- Lembeck Fred
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- Abstract:
- The release of histamine and serotonin by neuropeptides and capsaicin was measured in the isolated perfused rat hindquarter preparation. Substance P and two antagonistic peptides, [D-Pro2, D-Phe7, D-Trp9]-SP and [D-Pro2, D-Trp7,9)]-SP, release histamine, the SP(4-11) and SP(6-11) analogues did not. VIP and somatostatin released histamine and also serotonin. No amines were released by bombesin. Thus, all amine releasing peptides possessed at least two basic charges. However, the histamine releasing activity of the neuropeptides tested did not correlate with their reported ability to cause vasodilation and plasma extravasation. The SP(4-11) and SP(6-11) analogues which did not release histamine caused plasma extravasation. It is concluded that SP causes plasma extravasation by a direct action on blood vessels. Capsaicin released only serotonin but no histamine either in untreated rats and such desensitized with capsaicin as neonates. In rats desensitized with capsaicin 4 days prior to the experiment the substance P induced histamine release was as high as in untreated controls; it was, however, absent in rats desensitized with capsaicin as neonates. It is assumed that the sensitivity of mast cells to substance P is lost after degeneration of substance P containing primary sensory fibers.
- Find related publications in this database (using NLM MeSH Indexing)
- Animals -
- Animals, Newborn -
- Capsaicin - pharmacology
- Hindlimb - secretion
- Histamine Release - drug effects
- Male - drug effects
- Mast Cells - secretion
- Perfusion - secretion
- Rats - secretion
- Rats, Inbred Strains - secretion
- Serotonin - secretion
- Somatostatin - pharmacology
- Substance P - pharmacology
- Vasoactive Intestinal Peptide - pharmacology