Publisher： Bentham Science Publishers
E-ISSN： 1873-5576|6|5|433-445
ISSN： 1568-0096
Source： Current Cancer Drug Targets, Vol.6, Iss.5, 2006-08, pp. : 433-445
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Abstract
Malignant gliomas are frequently chemoresistant and this resistance seems to depend on at least two mechanisms. First, the poor penetration of many anticancer drugs across the blood-brain barrier (BBB), the blood-cerebrospinal fluid barrier (BCSFB) and blood-tumor barrier (BTB), due to their interaction with several ATP-binding cassette (ABC) drug efflux transporters that are overexpressed by the endothelial or epithelial cells of these barriers. Second, resistance may involve the tumor cells themselves. Although ABC drug efflux transporters in tumor cells confer multidrug resistance (MDR) on several other solid tumors, their role in gliomas is unclear. This review focuses on astrocytes and summarizes the current state of knowledge about the expression, distribution and function of ABC transporters in normal and tumor astroglial cells. The recognition of anticancer drugs by ABC transporters in astroglial cells and their participation in the multidrug resistance phenotype of human gliomas is discussed.
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