scholarly journals Studies on the Metabolic Fate of Lamivudine (II): Tissue Distribution, Transfer into Fetus and Milk, Plasma Protein Binding and Distribution to Erythrocytes of Lamivudine in Rats.

1997 ◽  
Vol 12 (2) ◽  
pp. 92-101
Author(s):  
Takatoshi TAKUBO ◽  
Seiji HIRAYAMA ◽  
Takahito MORIYA ◽  
Yoshiyuki MINAMIDE ◽  
Toshihiro KATO ◽  
...  
Keyword(s):  
Protein Binding ◽  
Tissue Distribution ◽  
Plasma Protein Binding ◽  
Plasma Protein ◽  
Metabolic Fate

scholarly journals Pharmacokinetics, Tissue Distribution, Plasma Protein Binding Studies of 10-Dehydroxyl-12-Demethoxy-Conophylline, a Novel Anti-Tumor Candidate, in Rats

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 283
Author(s):  
Chengjun Jiang ◽  
Jie Li ◽  
Xianghai Cai ◽  
Nini Li ◽  
Yan Guo ◽  
...  
Keyword(s):  
Protein Binding ◽  
Tissue Distribution ◽  
Plasma Protein Binding ◽  
Plasma Protein ◽  
Equilibrium Dialysis ◽  
Free Fraction ◽  
Ultra Performance Liquid Chromatography ◽  
Sprague Dawley ◽  
Binding Studies ◽  
High Protein Binding

10-Dehydroxyl-12-demethoxy-conophylline is a natural anticancer candidate. The motivation of this study was to explore the pharmacokinetic profiles, tissue distribution, and plasma protein binding of 10-dehydroxyl-12-demethoxy-conophylline in Sprague Dawley rats. A rapid, sensitive, and specific ultra-performance liquid chromatography (UPLC) system with a fluorescence (FLR) detection method was developed for the determination of 10-dehydroxyl-12-demethoxy-conophylline in different rat biological samples. After intravenous (i.v.) dosing of 10-dehydroxyl-12-demethoxy-conophylline at different levels (4, 8, and 12 mg/kg), the half-life t1/2α of intravenous administration was about 7 min and the t1/2β was about 68 min. The AUC0→∞ increased in a dose-proportional manner from 68.478 μg/L·min for 4 mg/kg to 305.616 mg/L·min for 12 mg/kg. After intragastrical (i.g.) dosing of 20 mg/kg, plasma levels of 10-dehydroxyl-12-demethoxy-conophylline peaked at about 90 min. 10-dehydroxyl-12-demethoxy-conophyllinea absolute oral bioavailability was only 15.79%. The pharmacokinetics process of the drug was fit to a two-room model. Following a single i.v. dose (8 mg/kg), 10-dehydroxyl-12-demethoxy-conophylline was detected in all examined tissues with the highest in kidney, liver, and lung. Equilibrium dialysis was used to evaluate plasma protein binding of 10-dehydroxyl-12-demethoxy-conophylline at three concentrations (1.00, 2.50, and 5.00 µg/mL). Results indicated a very high protein binding degree (over 80%), reducing substantially the free fraction of the compound.

scholarly journals Metabolic Fate of Zolpidem. (IV). Serum and Plasma Protein Binding of zolpidem and Its Transfer into the Blood Cells in Rats, Monkeys and Humans.

1993 ◽  
Vol 8 (4) ◽  
pp. 445-455
Author(s):  
Koji ISHIBASHI ◽  
Tomoko HASHIMOTO ◽  
Masataka KATASHIMA ◽  
Yoji TOKUMA ◽  
Kosei NODA
Keyword(s):  
Protein Binding ◽  
Plasma Protein Binding ◽  
Plasma Protein ◽  
Blood Cells ◽  
Metabolic Fate
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