Publication date: Available online 22 April 2017
Source:Experimental Cell Research
Author(s): Tian Lan, Haoran Wang, Zhihua Zhang, Mingshan Zhang, Yanming Qu, Zitong Zhao, Xinyi Fan, Qimin Zhan, Yongmei Song, Chunjiang Yu
Glioblastoma multiforme (GBM) is one of the most common brain malignancies worldwide and is typically associated with a dismal prognosis, yet the mechanisms underlying its aggressiveness remain unclear. Here, we revealed that β-arrestin 1 was overexpressed in GBM and contributed to poorer outcome. Knockdown of β-arrestin 1 suppressed the proliferation, invasiveness and glycolysis of GBM cells, and also enhanced temozolomide efficacy. Further, we discovered that knockdown of β-arrestin 1 decreased the activity of Src, and suppression of Src signaling was critically involved in β-arrestin 1 silencing-mediated suppression of GBM malignancies. Finally, we investigated the effect of β-arrestin 1 knockdown on the tumor growth and survival of xenograft models, and found that shβ-arrestin 1 apparently inhibited GBM growth in vivo and resulted in better survival of mice. Taken together, our findings suggest that knockdown of β-arrestin 1 can suppress GBM cell proliferation, invasion and glycolysis by inhibiting Src signaling. Thus, targeting β-arrestin 1 may be a potential therapeutic strategy for GBM treatment.
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