TBX20 inhibits colorectal cancer tumorigenesis by impairing NHEJ-mediated DNA repair.
TBX20 inhibits colorectal cancer tumorigenesis by impairing NHEJ-mediated DNA repair.
复制标题
TBX20 通过损害 NHEJ 介导的 DNA 修复来抑制结直肠癌肿瘤发生。
作者:
DNA high methylation is one of driving force for colorectal carcinoma (CRC) pathogenesis. Transcription factors (TFs) can determine cell fate and play fundamental roles in multistep process of tumorigenesis. Dysregulation of DNA methylation of TFs should be vital for the progression of CRC. Here, we demonstrated that TBX20, a T‐box TF family protein, was downregulated with hypermethylation of promoter in early‐stage CRC tissues and correlated with a poor prognosis for CRC patients. Moreover, we identified PDZRN3 as the E3 ubiquitin ligase of TBX20 protein, which mediated the ubiquitination and degradation of TBX20. Furthermore, we revealed that TBX20 suppressed cell proliferation and tumor growth through impairing non‐homologous DNA end joining (NHEJ)‐mediated double‐stranded break repair by binding the middle domain of both Ku70 and Ku80 and therefore inhibiting their recruitment on chromatin in CRC cells. Altogether, our results reveal the tumor‐suppressive role of TBX20 by inhibiting NHEJ‐mediated DNA repair in CRC cells, and provide a potential biomarker for predicting the prognosis of patients with early‐stage CRC and a therapeutic target for combination therapy. Our study highlights the dysregulation of TBX20 in early‐stage CRC tissues and the mechanism suppressing NHEJ‐mediated DSBs repair by inhibiting the interaction of Ku70 and Ku80, which indicates the potential of TBX20 as an effective biomarker for predicting the prognosis of patients with early‐stage CRC.
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影响因子:
20.1
作者:
Boogerd CJ;Zhu X;Aneas I;Sakabe N;Zhang L;Sobreira DR;Montefiori L;Bogomolovas J;Joslin AC;Zhou B;Chen J;Nobrega MA;Evans SM
通讯作者:
Evans SM
影响因子:
13.8
作者:
JACKSON, SP;JEGGO, PA
通讯作者:
JEGGO, PA
影响因子:
4.4
作者:
Kaltenbrun, Erin;Greco, Todd M.;Slagle, Christopher E.;Kennedy, Leslie M.;Li, Tuo;Cristea, Ileana M.;Conlon, Frank L.
通讯作者:
Conlon, Frank L.
影响因子:
168.9
作者:
Gray, Richard;Barnwell, Jennifer;Kerr, David J.
通讯作者:
Kerr, David J.
影响因子:
8.8
作者:
Cai MY;Dunn CE;Chen W;Kochupurakkal BS;Nguyen H;Moreau LA;Shapiro GI;Parmar K;Kozono D;D'Andrea AD
通讯作者:
D'Andrea AD