Investigation of biological effects of IDH gene mutation in malignant glioma

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We investigated biological effects of glioma-related genetic alteration, IDH1 gene mutation, in human glioma cells. The IDH1R132H gene was introduced into highly transformed glioblastoma cells by transfection, and the cells overexpressing IDH1R132H were selected by G418 treatment. These cells did not exhibit significant changes in expression of tumor-, apoptosis-, or cell cycle-related genes, but were rather sensitive to CDDP treatment. Xenografts in athymic mice derived from these cells grew slower than parental cells. These results suggested that IDH1 mutation which is a hallmark of representative genetic alterations in lower grade glioma might bestow negative impact on aggressive behavior of higher grade gliomas.