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A novel tumor-promoting role for nuclear factor IX in glioblastoma is mediated through transcriptional activation of GINS1.
Molecular Cancer Research : MCR 2022 December 6
Our previous study illustrated that nuclear factor IX (NFIX) promotes glioblastoma (GBM) progression by inducing migration and proliferation of GBM cells. However, the underlying mechanism of how NFIX regulates GBM cell proliferation remains obscure. In this study, we uncovered that Go-Ichi-Ni-San 1 (GINS1) is up-regulated and positively correlated with NFIX in human GBM specimen. NFIX silencing down-regulates the expression of GINS1, which is pivotal for cell-cycle progression and proliferation of GBM cells. Replenishment of GINS1 largely rescues the NFIX-null effect on GBM cell proliferation. Mechanistic investigation revealed that NFIX transcriptionally actives GINS1 expression by directly binding to promoter region (-1779 to -1793bp) of the GINS1 gene. Furthermore, knockdown of NFIX sensitizes GBM cells to DNA damage-inducing agents including Doxorubicin (DOX) and Temozolomide (TMZ), in a GINS1-dependent manner. Implications: Our study highlights that targeting NFIX-GINS1 axis could be a novel and potential therapeutic approach for GBM treatment.
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