The observed in vifro effects of propentofylline as an inhibitor of adenosine transport
have been confirmed in vivo. Propentofylline (2 x 10 mg/kg administered intraperitoneally
(i.p.) in two doses, 2 h apart, with the second injection administered
15 min before 20 min of induced forebrain ischemia) significantly enhanced the ischemia-
induced increase of extracellular adenosine concentration in the rat brain while
simultaneously decreasing the concentrations of adenosine catabolites: inosine, hypoxanthine,
and xanthine ( I ) . It is interesting to note that, although propentofylline is a
much less potent adenosine transport inhibitor than dipyridamole or nitrobenzylthioinosine
( 18), neither of these two drugs demonstrates neuroprotective effects against
brain ischemia in viva This may be due to the poor penetration of dipyridamole and
nitrobenzylthioinosine through the blood-brain barrier.
The observed in vifro effects of propentofylline as an inhibitor of adenosine transport
have been confirmed in vivo. Propentofylline (2 x 10 mg/kg administered intraperitoneally
(i.p.) in two doses, 2 h apart, with the second injection administered
15 min before 20 min of induced forebrain ischemia) significantly enhanced the ischemia-
induced increase of extracellular adenosine concentration in the rat brain while
simultaneously decreasing the concentrations of adenosine catabolites: inosine, hypoxanthine,
and xanthine ( I ) . It is interesting to note that, although propentofylline is a
much less potent adenosine transport inhibitor than dipyridamole or nitrobenzylthioinosine
( 18), neither of these two drugs demonstrates neuroprotective effects against
brain ischemia in viva This may be due to the poor penetration of dipyridamole and
nitrobenzylthioinosine through the blood-brain barrier.
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