title: High performance liquid chromatographic analysis an pharmacokinetic characteristics of ID-7181, a novel quaternary ammoniopropenyl cephalosporin, following intravenous and intramuscular injections to rats.
abstract: The purpose of the present study was to examine the pharmacokinetic characteristics of 7-[(z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetamido]-3-[(E)-3-(E)-(1-carbamoyl-1-propene-3-yl) 3-ethylmethylammonio]-1-propene- 1-yl]-3-cepheme-4-carboxylate (CAS 206126-08-1, ID-7181), a novel quaternary ammoniopropenyl cephalosporin that contains two vinyl groups at the C-3 side chain, after being administered intravenously (i.v.) or intramuscularly (i.m.) to rats. An HPLC-based method was developed to analyze the ID-7181 levels in the plasma, bile, urine, feces, and tissue homogenates and validated in a pharmacokinetic study. The plasma concentration of ID-7181 decreased to below the quantifiable limit at 6 h after the i.v. administration to rats following doses of 2-10 mg/kg, yielding a t(1/2,beta) of 77.7-81.7 t(1/2) after i.m. doses of 10-50 mg/kg were 79.3-127 min. The total plasma clearance (CLt) decreased with the nonlinear pharmacokinetics with an increase in the i.m. dose from 10 to 50 mg/kg in rats, while it was not significantly altered after the i.v. dose. The bioavailability of the i.m. administered ID-7181 was 43-63 %. Of the various tissues tested, ID-7181 was mainly distributed in the kidney after the i.v. or i.m. administration. The ID-7181 concentrations in the kidney 0.5 h after being administered i.v. or i.m. were comparable to the plasma concentrations shortly after being administered i.v. or the Cmax after being administered i.m. However, the ID-7181 concentrations in the tissues 6 h after being administered i.v. or i.m. decreased to low i.m. were 35-45 % of the initial doses. The corresponding values in the bile 6 h after being administered i.v. or i.m. were 0.5-1% of the initial dose. In conclusion, ID-7181, administered i.v. or i.m., is mainly distributed to the kidney. By 6 h after i.v. or i.m. administration, the ID-7181 concentrations in the various tissues decreased to very low levels. Moreover, the majority of ID-7181 appeared to be excreted in the urine.
authors.affiliation: National Research Laboratory (NRL) of PK/PD, Biotechnology Research Institute, College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk, Korea.
authors.forename: Bo-Im
authors.initials: BI
authors.lastname: Yoo
authors.forename: Zi Ho
authors.initials: ZH
authors.lastname: Yeom
authors.forename: Min Hee
authors.initials: MH
authors.lastname: Kanga
authors.forename: Oh-Seung
authors.initials: OS
authors.lastname: Kwon
authors.forename: Jae Hoon
authors.initials: JH
authors.lastname: Kang
authors.forename: Seeung Woo
authors.initials: SW
authors.lastname: Yu
authors.forename: Dong-Cheul
authors.initials: DC
authors.lastname: Moon
authors.forename: Sukgil
authors.initials: S
authors.lastname: Song
authors.forename: Youn Bok
authors.initials: YB
authors.lastname: Chung
mesh_terms: D000465:Algorithms; D000818:Animals; D019540:Area Under Curve; D001646:Bile / Q000378:metabolism; D002138:Calibration; D002511:Cephalosporins / Q000008:administration & dosage / Q000493:pharmacokinetics*; D002851:Chromatography, High Pressure Liquid; D005243:Feces / Q000737:chemistry; D006207:Half-Life; D007273:Injections, Intramuscular; D007275:Injections, Intravenous; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D014018:Tissue Distribution
chemical_list: D002511:Cephalosporins; C505496:ID-7181