Histamine is a biogenic amine released from blood basophils and mast cells during inflammation. It causes vasodilatation and increased capillary permeability. Histamine release could be hindered by various active substances, including steroids and non steroidal anti-inflammatory substances.
In our study we wanted to determine the influence of selected steroids and non steroidal anti-inflammatory substances on histamine release from rat peritoneal mast cells activated by compound 48/80. We used cortisone, hydrocortisone and prednisolone among steroids and ketoprofen, diclofenac and indomethacin among non steroidal anti-inflammatory substrances. We also investigated the influence of the selected substances on histamine release from inactivated rat peritoneal mast cells. We isolated rat peritoneal mast cells and exposed them to different concentrations of the selected steroids and non steroidal anti-inflammatory substances. Histamine release was induced by non-immunologic secretagogue, compound 48/80. The concentration of histamine was measured spectrofluorophotometrically. While performing this study we found out that both steroids and non steroidal anti-inflammatory substances hinder histamine release from rat peritoneal mast cells activated with compound 48/80. The inhibition of histamine release depends on the concentration of the selected substance and increases with its concentration. The maximal inhibition was observed when mast cells activated by compound 48/80 were incubated with indomethacin. We noticed 90 % inhibition at a 10-3 mol/L concentration. On the other hand, hydrocortisone was the only substance with no inhibitory effect on histamine release induced by compound 48/80. In our study none of the substances had an influence on histamine release from inactivated mast cells.
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