GABABR/GSK‐3β/NF‐κB signaling pathway regulates the proliferation of colorectal cancer cells. (5th April 2016)

• Record Type: Journal Article
• Authors: Shu, Qing; Liu, Jun; Liu, Xiupeng; Zhao, Sufang; Li, Hualin; Tan, Yonggang; Xu, Jianming
• Is Part Of: Cancer medicine. Volume 5:Number 6(2016:Jun.)
• Page Start: 1259
• Page End: 1267
• Publication Date: 2016-04-05
• Subjects: Cell cycle -- colorectal cancer -- GABABR -- GSK‐3β -- NF‐κB -- proliferation; 616.994005
• DOI: 10.1002/cam4.686
• Languages: English
• ISSNs: 2045-7634

Abstract

Abstract: Colorectal cancer is one of the leading causes of highly fatal cancer‐related deaths in the whole world. Fast growth is critical characteristic of colorectal cancer, the underlying regulatory mechanism of colorectal cell fast proliferation remains largely unknown. Here, we reported that activation of metabotropic γ ‐Aminobutyric acid receptor (GABAB R) signaling significantly inhibited the colorectal cell HT29 proliferation by arresting the cell at G1 phase. Inhibition of GABAB R activated GSK‐3 β by reducing the phosphorylation level of GSK‐3 β . Activation of GSK‐3 β blocked the function of GABAB R signaling on repressing cell proliferation. We further found that GABAB R activation inhibited NF‐ κ B activity. The promotion of cell proliferation caused by downregulation of GABRB R could be blocked by inhibition of NF‐ κ B activation. Overall, activation of GABAB R leaded to inhibition of GSK‐3 β activation to repress the NF‐ κ B function during colorectal cancer cell proliferation. This study revealed critical function of GABAB R/GSK‐3 β /NF‐ κ B signaling pathway on regulating proliferation of colorectal cancer cell, which might provide a potential therapeutic target for clinical colorectal cancer treatment. Abstract : Activation of γ ‐Aminobutyric acid receptor (GABAB R) signaling significantly inhibited the colorectal cell HT29 proliferation by arresting the cell at G1 phase. Inhibition of GABAB R could activate GSK‐3 β by reducing the phosphorylation level of GSK‐3 β, moreover, activation of GSK‐3 β blocked the repression of cell proliferation caused by inhibition of GABAB R signaling. Activation of GABAB R leaded to inhibition of GSK‐3 β activation to repress the NF‐κB function during colorectal cancer cell proliferation.