Abstract
We investigated the effect of cisplatin on glutamate release in the hypothalamus of Suncus murinus measured by brain microdialysis. Dialysis samples were collected every 20 min for 1 h before and 3 h after the cisplatin (30 mg/kg, i.p.) administration with the animals also being observed for the development of emesis. Cisplatin increased glutamate levels within 1 h and this was closely associated with the occurrence of emesis. Pretreatment with the 5-HT3– receptor antagonist ondansetron (2 mg/kg, i.p.) inhibited both the emesis and the increased glutamate levels. These results suggest that hypothalamic glutamate is involved in cisplatin-induced emesis in Suncus murinus.
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