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The Neuropathology of Vigabatrin
Author(s) -
Butler William H.
Publication year - 1989
Publication title -
epilepsia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.687
H-Index - 191
eISSN - 1528-1167
pISSN - 0013-9580
DOI - 10.1111/j.1528-1157.1989.tb05827.x
Subject(s) - vigabatrin , myelin , neuropathology , discontinuation , pathology , chemistry , myelin sheath , anticonvulsant , pharmacology , central nervous system , medicine , neuroscience , biology , epilepsy , disease
Summary: Vigabatrin (gamma vinyl GABA, GVG), an enzyme‐activated, irreversible inhibitor of GABA transaminase, was administered orally to rats, dogs, and monkeys to observe toxicologic reactions. Myelin vacuolation of the brain was observed. The vacuolation was limited to myelinated tracts and resulted from separation of the myelin sheath at the interperiod line. There was no evidence of demyelination, axonal degeneration, or damage uolation was histologically similar to that observed in association with other drugs such as triethyltin, isoniazid, or hexachlorophene. However, the distribution is limited to the brain and is reversible upon discontinuation of therapy. Two postmortem and three operative specimens from humans have revealed no evidence of vacuolation of myelin.