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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Ability of nitrobenzylthioinosine to cross the blood-brain barrier in rats.

Nucleoside transport inhibitors that cross the blood-brain barrier may be able to potentiate the neuroprotective effects of adenosine. We tested whether nitrobenzylthioinosine (NBMPR) crosses the blood-brain barrier in three types of experiments. First, intravenous injection of [3H]NBMPR and [14C]sucrose was performed. Brain volume of distribution and brain delivery were greater for [3H]NBMPR than for [14C]sucrose. Second, rats were injected intraperitoneally with NBMPR 5'-monophosphate (NBMPR-P), a prodrug form of NBMPR, or vehicle. Perchloric acid extracts of brains from rats treated with NBMPR-P inhibited [3H]NBMPR binding in competition binding assays nearly 3-fold more than extracts from brains of vehicle-treated animals. Third, cerebrospinal fluid (CSF) extracted from rats treated with NBMPR-P (10 mg/kg i.p.) contained 24.1 +/- 4.4 nM NBMPR while levels were undetectable in CSF from vehicle-treated rats. From these data, we conclude that NBMPR crosses the blood-brain barrier.[1]


  1. Ability of nitrobenzylthioinosine to cross the blood-brain barrier in rats. Anderson, C.M., Sitar, D.S., Parkinson, F.E. Neurosci. Lett. (1996) [Pubmed]
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