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miR-21 and CXCR4 levels in malignant glioma tissues and cells. (a, b) The expression of miR-21 and CXCR4 was detected by qRT-PCR in glioma and normal adjacent tissues samples. (c) The levels of CXCR4 were determined by western blot in tumor and normal tissues samples. (d, e) The expression of miR-21 and CXCR4 was measured by qRT-PCR in glioma cells (U251 and U87) and control cells (HAc). (f) CXCR4 protein levels were tested by western blot. ∗P < 0.05.
