GBP5 drives malignancy of glioblastoma via the Src/ERK1/2/MMP3 pathway

Xiaoting Yu, Jing Jin, Yanwen Zheng, Hua Zhu, Hui Xu, Jun Ma, Qing Lan, Zhixiang Zhuang, Clark C. Chen, Ming Li

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Guanylate binding proteins (GBPs), a family of interferon-inducible large GTPase, play a pivotal role in cell-autonomous immunity and tumor malignant transformation. Glioblastoma (GBM) is the most prevalent and lethal primary brain tumor in adults. Here we show that GBP5 was highly expressed in GBM cell lines and in clinical samples, especially in the mesenchymal subtype. The expression levels of GBP5 were negatively correlated with the prognosis of GBM patients. Overexpression of GBP5 promoted the proliferation, migration, and invasion of GBM cells in vitro and in vivo. In contrast, silencing GBP5 by RNA interference exhibited the opposite effects. Consequently, targeting GBP5 in GBM cells resulted in impaired tumor growth and prolonged survival time of mice with GBM tumors. We further identified that the Src/ERK1/2/MMP3 axis was essential for GBP5-promoted GBM aggressiveness. These findings suggest that GBP5 may represent a novel target for GBM intervention.

Original languageEnglish (US)
Article number203
JournalCell Death and Disease
Issue number2
StatePublished - Feb 2021

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© 2021, The Author(s).


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