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Details on Person Significant amounts of ribavirin (RBV) are phosphorolyzed to...

Class:IdSummation:9755064
_displayNameSignificant amounts of ribavirin (RBV) are phosphorolyzed to...
_timestamp2022-01-16 09:07:55
created[InstanceEdit:9755067] Stephan, Ralf, 2021-10-05
modified[InstanceEdit:9761905] Stephan, Ralf, 2022-01-16
textSignificant amounts of ribavirin (RBV) are phosphorolyzed to 1,2,4-triazole-3-carboxamide (T-CONH2), already in the first pass through intestinal cells. The responsible enzyme purine nucleoside phosphorylase (PNP) is expressed in higher amounts in the small intestine than in the liver, which also correlates with higher cytosolic phosphorolysis activity in intestinal cells. The amount of conversion to T-CONH2 in the liver is additionally reduced by phosphorylation of RBV to RBV-MP. T-CONH2 from this reaction is the major metabolite detectable in urine (Paroni et al, 1989; Furihata et al, 2014).
(summation)[Reaction:9755044] PNP trimer transforms RBV to T-CONH2 [Homo sapiens]
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