Abstract
Isolated heart preparations were prepared from guinea-pigs passively sensitized with mouse anti-DNP monoclonal IgE to study hemodynamic parameters and histamine release upon antigen challenge (DNP-BSA). In the best experimental conditions a triphasic response (increase, decrease, increase) in heart rate and in coronary flow occurred during 10 minutes after challenge. Coronary flow dramatically decreased (50%) at 2.5 min flanked by two periods of increase in flow and tachycardia (+55% of the basal heart rate). Contractile force decreased and remained at 80% of its initial value. Histamine is released within 2 minutes after antigen injection. After this period, the observed hemodynamic modifications seem to be due to other anaphylactic mediators such as prostaglandins, leukotrienes and most probably paf-acether.
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Denizot, Y., Boudet, J., Burtin, C. et al. Monoclonal IgE-mediated cardiac hypersensitivity reactions in the guinea-pig. Agents and Actions 29, 167–171 (1990). https://doi.org/10.1007/BF01966442
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DOI: https://doi.org/10.1007/BF01966442