EGR1 and glioma: EGO-A function is not yet known [73], but its potential role in glioma biogenesis may be implied by the chromosomal location, since its host gene ITPR1 (inositol triphosphate receptor type 1) is encoded in close proximity to EGR-1 (early growth response 1), a transcriptional regulator of genes required for induction of mitosis, cell differentiation, and growth [74].