Simple liquid chromatographic method for the analysis of the blood brain barrier permeability characteristics of ceftriaxone in an experimental rabbit meningitis model

被引:16
作者
Owens, HM
Destache, CJ
Dash, AK
机构
[1] Creighton Univ, Sch Pharm & Allied Hlth Profess, Dept Pharmaceut & Adm Sci, Omaha, NE 68178 USA
[2] Creighton Univ, Sch Pharm & Allied Hlth Profess, Dept Pharm Practice, Omaha, NE 68178 USA
来源
JOURNAL OF CHROMATOGRAPHY B | 1999年 / 728卷 / 01期
关键词
ceftriaxone;
D O I
10.1016/S0378-4347(99)00105-X
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A simple LC method was developed and validated for the analysis of ceftriaxone in aqueous and biological samples. Chromatographic separation was achieved on a reversed-phase C-18 microbore column (Hypersil 5 mu m, 200x2.1 mm) with UV detection at 270 nm. This isocratic system was operated at ambient temperature and required less than 10 min of chromatographic time. The flow-rate was maintained at 0.5 mi min(-1). Cetyltrimethylammonium bromide (0.01 M) was utilized as the ion-pairing agent. For the analysis of the drug in the aqueous system, the mobile phase consisted of methanol-acetonitrile-phosphate buffer, pH 7.4 (20:20:60, v/v/v). The plasma and CSF systems used the same mobile phase constituents in a slightly different ratio (30:40:30, v/v/v). Lidocaine was used as an internal standard and the peak height ratios of the drug to that of the internal standard were linear over the concentration range of 0.0 to 16 mu g ml(-1) only in the case of aqueous systems. Within-day and day-to-day relative standard deviations ranged from 0.3 to 2.2% and 1.1 to 5.9%, respectively. This method was used to: (1) quantify ceftriaxone in an aqueous system, in rabbit plasma using a simple protein precipitation procedure, and in the CSF; (2) evaluate the permeability characteristics of ceftriaxone across the blood-brain barrier through quantification of ceftriaxone in the CSF using a microdialysis sampling technique; and (3) analyze the effects of dexamethasone (a synthetic fluorinated corticosteroid used for the relief of cerebral edema) on the permeability of ceftriaxone across the blood brain barrier through quantification of ceftriaxone in the dexamethasone-treated animals with meningitis. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:97 / 105
页数:9
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