Superior protective effects of phenytoin against hypoxia in a pharmacological screening test.

Abstract:

:The selection of drugs to prevent the development of pathology in cerebral infarction remains an important problem. For the selection of effective drugs from among a large number of possible candidates, widely-used test screening techniques are sufficient for obtaining a good understanding of candidate drug effects. The effects of various drugs on the survival time of mice made hypoxic by exposure to a 4% O2-96% N2 gas have been examined. The survival time of 110 control animals was 170 +/- 6 s, showing a nearly normal distribution pattern. No control mouse had a survival time beyond 8 min. The survival time after the drugs were administered was as follows: suloctidil (12.5 mg/kg, n = 11), 1833 +/- 487 s; vitamin E (200 mg/kg, n = 15), 1160 +/- 342 s; pentobarbital (50 mg/kg, n = 12), 602 +/- 74 s; and phenytoin (100 mg/kg, n = 10), 2667 +/- 452 s. In contrast, administration of vitamin C, coenzyme Q, cytochrome c, beta-methasone, mannitol or germanium-132 did not result in prolongation of survival time. Comparison of the percentage of animals in each group which survived for more than 1 h showed 0% in the control group, 45.5% in the suloctidil group (12.5 mg/kg), 23.5% in the vitamin E group (200 mg/kg), 0% in the pentobarbital group (50 mg/kg) and 70% in the phenytoin group (100 mg/kg). These findings suggest that phenytoin is the most effective drug in combatting the effects of hypoxia (survival time was expressed as mean +/- SE).

journal_name

Neurol Res

journal_title

Neurological research

authors

Imaizumi S,Suzuki J,Kinouchi H,Yoshimoto T

doi

10.1080/01616412.1988.11739810

subject

Has Abstract

pub_date

1988-03-01 00:00:00

pages

18-24

issue

1

eissn

0161-6412

issn

1743-1328

journal_volume

10

pub_type

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