| Literature DB >> 573408 |
H Hasegawa, J C Allen, B M Mehta, W R Shapiro, J B Posner.
Abstract
Intracarotid (i.c.) hyperosmolar mannitol enhances central nervous system (CNS) penetration of intravenous (i.v.) methotrexate (MTX) in normal adult rats. A fivefold augmentation in the CSF:serum and ipsilateral brain:serum MTX concentration ratios was observed 1 hour after drug administration. Intravenous mannitol had no such effect. Rats with meningeal carcinomatosis have a partial defect in blood-brain barrier function, and the CSF:serum MTX concentration ratio was 4.6 times higher in these animals than in normal rats prior to mannitol therapy. Intracarotid hyperosmolar mannitol further augmented the blood-brain barrier permeability to intravenous MTX. Intracarotid mannitol increased the therapeutic effect of MTX, since rats with meningeal carcinomatosis that received i.v. MTX and i.c. mannitol experienced a slight enhancement in survival.Entities:
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Year: 1979 PMID: 573408 DOI: 10.1212/wnl.29.9_part_1.1280
Source DB: PubMed Journal: Neurology ISSN: 0028-3878 Impact factor: 9.910