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. 1994 Feb;111(2):431–434. doi: 10.1111/j.1476-5381.1994.tb14753.x

Induction of emesis in Suncus murinus by pyrogallol, a generator of free radicals.

Y Torii 1, H Saito 1, N Matsuki 1
PMCID: PMC1909966  PMID: 8004387

Abstract

1. We investigated whether or not pyrogallol, a generator of free radicals, is emetogenic in Suncus murinus, the house musk shrew. Pyrogallol (i.p.) caused dose-dependent emesis in suncus with an ED50 value of 77.3 mg kg-1. At a dose of 128 mg kg-1, all suncus vomited with mean latency of 18.8 +/- 5.2 min and the number of vomiting episodes was 8.6 +/- 2.9. 2. The prophylactic effects of N-(2-mercaptopropionyl)-glycine (MPG), an antioxidant, and tropisetron, a 5-hydroxytryptamine3 (5-HT3) receptor antagonist, were studied. Pyrogallol (128 mg kg-1, i.p.)-induced emesis was prevented by treatment with MPG (i.p.) or tropisetron (s.c.) with ID50 values of 149 mg kg-1 and 117 micrograms kg-1, respectively. 3. Pyrogallol-induced emesis was completely prevented by surgical abdominal vagotomy. 4. The present results indicate that pyrogallol-induced emesis is characteristically very similar to that caused by cisplatin and support the idea that generation of free radicals causes the release of peripheral 5-HT, which stimulates vagal afferent sensory nerves to cause emesis.

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Selected References

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