Abstract
Temozolomide is an alkylating agent which is used in glioblastoma treatment. We aimed to investigate the effects of different concentrations of temozolomide and exposure time on U87MG glioblastoma cell expression of CXCR4, MMP2, MMP9 and VEGF. U87MG cells were cultured in different temozolomide concentrations and incubation time and the effects of temozolomide on inducing apoptosis was investigated. The levels of VEGF and CXCR4 expression were measured by RT-PCR and flowcytometry. Moreover, MMP2 and MMP9 activity and expression were assessed by ELISA and zymography. CXCR4 and VEGF expression levels decreased upon applying higher concentration of temozolomide. MMP2 and MMP-9 had lower activity in cells with longer exposure time or higher doses of temozolomide. Temozolomide induces the apoptosis in U87MG glioblastoma cells at therapeutic or higher dose. It is capable of decreasing their expression levels of VEGF and CXCR4.
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