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Morikawa, N. et al.

Pharmacokinetics of anticancer drugs in cerebrospinal fluid.

OBJECTIVE: To examine the pharmacokinetics of anticancer drugs in the cerebrospinal fluid (CSF) during chemotherapy by the lumbar-ventricular (LV) and ventricular-lumbar (VL) routes. CASE SUMMARY: A 69-year-old Japanese woman with disseminated glioblastoma received two LV and four VL courses of CSF perfusion chemotherapy with methotrexate, nimustine, and cytarabine hydrochloride. Samples of CSF from the ventricles and lumbar spinal canal were obtained via Ommaya reservoirs during one LV and one VL course. Drug concentrations in the CSF were measured by fluorescence polarization immunoassay or HPLC. RESULTS: During LV CSF perfusion, the highest CSF drug concentrations in both the ventricles and the lumbar spinal canal were observed at the end of perfusion. During treatment, the concentrations of all three drugs in the lumbar spinal canal were higher than those in the ventricles. The CSF AUC of methotrexate in the ventricles was 16.1% of that in the lumbar spinal canal. During VL CSF perfusion, the highest drug concentrations were also observed at the end of perfusion. The drug concentrations in the lumbar spinal canal were initially lower than those in the ventricles. However, the concentrations of methotrexate and cytarabine in the lumbar spinal canal exceeded those in the ventricles 3 hours after perfusion. The AUC of methotrexate in the lumbar spinal canal was 174.9% of that in the ventricles. CONCLUSIONS: The pharmacokinetics of anticancer drugs in ventricular CSF differ from those in lumbar CSF during LV and VL perfusion chemotherapy.[1]

References

Pharmacokinetics of anticancer drugs in cerebrospinal fluid. Morikawa, N., Mori, T., Kawashima, H., Takeyama, M., Hori, S. The Annals of pharmacotherapy. (1998) [Pubmed]

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