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Histamine reduces ionising radiation-induced 8-OHdG labelling in cryptal cells. Intestinal crypts of A) untreated and B) histamine treated rats showing modest 8-OHdG immunoreactivity. C) Irradiated rat intestinal crypts demonstrating a higher number of 8-OHdG positive cells. D) Irradiated and histamine treated rat intestinal crypts showing fewer 8-OHdG positive cells. 630× magnification. Scale bar: 20 µm.
