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  • GABAergic signaling facilitates breast cancer metastasis by promoting ERK1/2-dependent phosphorylation.

GABAergic signaling facilitates breast cancer metastasis by promoting ERK1/2-dependent phosphorylation.

Cancer letters (2014-03-25)
Depu Zhang, Xiaowei Li, Ziming Yao, Chuanfei Wei, Nannan Ning, Jingxin Li
ABSTRACT

The present study aims to determine the role of γ-aminobutyric acid (GABA) signaling molecules in breast cancer metastasis. Our results reveal that GABAergic system exists in breast cancer cells. Both the GABA synthetic enzyme. (GAD65/67) and GABAB receptor are expressed in 4T1 mouse breast cancer cells, MCF-7 human breast cancer cells and human breast cancer tissue. Baclofen, a GABABR agonist, significantly promoted 4T1 cells invasion and migration in vitro and metastasis in vivo, an event that was attenuated by GABABR antagonist CGP55845. Baclofen-induced breast cancer metastasis was mediated by ERK1/2 pathway.

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