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OLIG2 (oligodendrocyte transcription factor 2) is a basic
helix-loop-helix transcription factor that regulates neural progenitor and
oligodendrocyte lineage development. In gliomas, particularly diffuse gliomas
and glioblastoma, OLIG2 is frequently expressed in tumour-propagating cells and
can support proliferation, stem-like properties, lineage plasticity and tumour
maintenance. OLIG2 also interacts with cell-cycle and DNA-damage-response
programs and can suppress p53-dependent growth arrest in some glioma models.
Experimental OLIG2 inhibition or depletion can reduce proliferation and
tumourigenic capacity and may promote differentiation. The typical
cancer-associated direction is therefore generally up or functionally
active in OLIG2-positive gliomas, while the desired anticancer
modulation is generally down or transcriptional inhibition.
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