期刊
CANCER SCIENCE
卷 113, 期 9, 页码 3018-3031出版社
WILEY
DOI: 10.1111/cas.15432
关键词
cell proliferation; colorectal cancer; PRAS40; RSK; TIFA
类别
资金
- Faculty Start-up Funds of Jining Medical University [600640001]
- National Natural Science Foundation of China [81802466]
- Natural Science Foundation of Shandong Province [ZR2019BH003]
- Shandong Medical Science and Technology Program [2018WS460]
- Student Innovation Training Program of Jining Medical University [cx2020002]
- Supporting Funds for Teacher's Research of Jining Medical University [JYFC2018KJ005, JYFC2018KJ011]
TIFA expression is increased in colorectal cancer and positively correlated with disease progression. Knockdown of TIFA inhibits cell proliferation, while overexpression enhances cell proliferation. These findings indicate the significant role of TIFA in colorectal cancer progression.
Previous studies have reported that TIFA plays different roles in various tumor types. However, the function of TIFA in colorectal cancer (CRC) remains unclear. Here, we showed that the expression of TIFA was markedly increased in CRC versus normal tissue, and positively correlated with CRC TNM stages. In agreement, we found that the CRC cell lines show increased TIFA expression levels versus normal control. The knockdown of TIFA inhibited cell proliferation but had no effect on cell apoptosis in vitro or in vivo. Moreover, the ectopic expression of TIFA enhanced cell proliferation ability in vitro and in vivo. In contrast, the expression of mutant TIFA (T9A, oligomerization site mutation; D6, TRAF6 binding site deletion) abolished TIFA-mediated cell proliferation enhancement. Exploration of the underlying mechanism revealed that the protein synthesis-associated kinase RSK and PRAS40 activation were responsible for TIFA-mediated CRC progression. In summary, these findings suggest that TIFA plays a role in mediating CRC progression. This could provide a promising target for CRC therapy.
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