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- W2076455180 abstract "The influx transport mechanism of pentazocine (PTZ) at the blood-brain barrier (BBB) was investigated in rats using the carotid injection technique. The uptake kinetics of PTZ into the rat brain exhibited saturability, which occurred by both nonsaturable and carrier-mediated transport processes. The in vivo kinetic parameters were estimated as follows: the maximal uptake rate (Jmax), 3.6 +/- 1.2 micromol/min/g brain and the apparent Michaelis constant (K1), 3.7 +/- 1.7 mM for the saturable component of PTZ into the brain, and the nonsaturable uptake rate constant (Kd), 0.06 +/- 0.04 ml/min/g brain. The uptake of PTZ by the brain was strongly inhibited by lidocaine, imipramine and propranolol, and also by H1-antagonists such as mepyramine, diphenhydramine. In addition, narcotic-antagonist analgesic (buprenorphine, butorphanol or eptazocine) and an opioid antagonist (naloxone) significantly inhibited PTZ transport. These results suggest that PTZ permeates into the brain via a carrier-mediated transport system, which may widely recognize the cationic drugs." @default.
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- W2076455180 date "2002-01-01" @default.
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- W2076455180 title "Investigation on the Influx Transport Mechanism of Pentazocine at the Blood-Brain Barrier in Rats Using the Carotid Injection Technique." @default.
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- W2076455180 doi "https://doi.org/10.1248/bpb.25.1351" @default.
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