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Cancer Chemother Pharmacol. 2014 Jul;74(1):185-93. doi: 10.1007/s00280-014-2490-0. Epub 2014 May 28.

Irinotecan and temozolomide brain distribution: a focus on ABCB1.

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1
Clinical Pharmacy Department - EA 4123, College of Pharmacy, Paris-Sud University, 5 rue Jean Baptiste Clement, 92296, Chatenay Malabry, France, lauriane.goldwirt@u-psud.fr.

Abstract

Glioblastoma (GBM), the most common primary brain tumor in adults, is usually rapidly fatal with median survival duration of only 15 months and a 3-year survival rate of <7 %. Temozolomide (TMZ) is the only anticancer drug that has improved survival in GBM when administered with concomitant radiotherapy. Irinotecan (CPT-11) has also shown efficacy in recurrent gliomas monotherapy with moderate response. As the efficacy of GBM treatments relies on their brain distribution through the blood-brain barrier (BBB), the aim of the present work was to study, on an in vivo model, the brain distribution of TMZ, CPT-11 and its active metabolite, SN-38. We have focussed on the role of ABCB1, the main efflux transporter at the BBB level, through pharmacokinetics studies in CF1 mdr1a(+/+) and mdr1a(-/-) mice. Our results show that TMZ, CPT-11 and SN-38 are transported by ABCB1 at the BBB level with brain/plasma ratios of 1.1, 2.1 and 2.3, respectively.

PMID:
24867782
DOI:
10.1007/s00280-014-2490-0
[Indexed for MEDLINE]

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