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Updated: Jun 20, 2026

A Choroid Plexus Epithelial Cell-based Model of the Human Blood-Cerebrospinal Fluid Barrier to Study Bacterial Infection from the Basolateral Side
Published on: May 6, 2016
Penetration of colistin into cerebrospinal fluid
S L Markantonis1, N Markou, M Fousteri
1Department of Pharmaceutical Technology, Laboratory of Biopharmaceutics and Pharmacokinetics, Faculty of Pharmacy, University of Athens, Panepistimiopolis, 157.71 Athens, Greece. kyroudi@pharm.uoa.gr
Abstract:
Colistin penetration into the cerebrospinal fluid (CSF) was studied in five critically ill adult patients receiving colistin methanesulfonate for infections by multiresistant gram-negative bacilli. Colistin concentrations were determined in paired serum and CSF samples, with the latter taken by lumbar puncture, with the exception of one patient with an external ventriculostomy. CSF-to-serum ratios (0.051 to 0.057) for all study patients coincided at all sampling times. The low level (5%) of penetration suggests inadequate bactericidal colistin concentrations in the CSF.
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