The effects of endothelin-1 (ET-1) on mucosal mast cells are of special interest, since they may be an important component of the tissue response that occurs during ischaemic preconditioning or ischaemia/re-oxygenation injuries. Increasing doses of ET-1 were administered intravenously to anaesthetized rats. In a second series of experiments, animals were pretreated with the ETA receptor antagonists BQ-610 or ETR-P1/fl peptide, or with the ETB receptor antagonist IRL-1038. Intestinal perfusion changes were recorded, and the proportion of degranulated mast cells and the degree of mucosal damage were determined in ileal biopsies. ET-1 induced dose-dependent alterations in the haemodynamic and morphological parameters, and caused significant mast cell degranulation. These changes were inhibited significantly by pretreatment with the ETA receptor antagonists, but not with the ETB receptor antagonist. We conclude that a cross-talk exists between endothelial cell-derived humoral mediators and the intestinal mast cell system.
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September 2002
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Conference Article|
September 01 2002
Endothelin-1 induces mucosal mast cell degranulation and tissue injury via ETA receptors
Mihály BOROS;
1University of Szeged, Institute of Surgical Research, P.O. Box 464, H-6701 Szeged, Hungary
Professor Mihály Boros (e-mail [email protected]).
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László SZALAY;
László SZALAY
1University of Szeged, Institute of Surgical Research, P.O. Box 464, H-6701 Szeged, Hungary
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József KASZAKI
József KASZAKI
1University of Szeged, Institute of Surgical Research, P.O. Box 464, H-6701 Szeged, Hungary
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Publisher: Portland Press Ltd
Online ISSN: 1470-8736
Print ISSN: 0143-5221
© 2002 The Biochemical Society and the Medical Research Society
2002
Clin Sci (Lond) (2002) 103 (s2002): 31S–34S.
Citation
Mihály BOROS, László SZALAY, József KASZAKI; Endothelin-1 induces mucosal mast cell degranulation and tissue injury via ETA receptors. Clin Sci (Lond) 1 September 2002; 103 (s2002): 31S–34S. doi: https://doi.org/10.1042/CS103S031S
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