Abstract
Lipopolysaccharide-induced tumor necrosis factor alpha factor (LITAF) is a transcription factor that activates the transcription of TNF-α and regulates the inflammatory response. LITAF has been found to have potential anti-cancer effects of in several tumors. However, the role of LITAF in colorectal cancer (CRC) remains unclear. Through a comprehensive pan-cancer analysis of the Cancer Genome Atlas (TCGA), LITAF was identified as a differentially downregulated gene in CRC. We hypothesized that LITAF may participate in the modulation of CRC progression. The present study was aimed to investigate the expression profile of LITAF in CRC and its effect on metastatic behavior and stemness as well as the underlying molecular mechanism. The expression profile of LITAF in CRC, and its relationship with the prognosis of CRC were explored using public databases. LITAF expression was detected by quantitative real-time PCR (qRT-PCR), western blot, and immunohistochemistry. Furthermore, the effects of overexpression or knockdown of LITAF on cell proliferation, apoptosis, migration, invasion, and stemness of CRC cells were investigated in vitro. The regulatory effect of LITAF on forkhead Box O 1 (FOXO1)-sirtuin 1 (SIRT1) signaling axis was also explored. In addition, a xenograft mouse model was used to investigate the in-vivo role of LITAF. LITAF was downregulated in tumor tissues and its expression was associated with the prognosis, pathological stage and liver metastasis. In-vitro experiments confirmed that LITAF inhibited tumor cell proliferation, migration, invasion and stemness, and induced cell apoptosis. In vivo experiments demonstrated that LITAF inhibited the tumorigenicity and liver metastasis in tumor-bearing mice. Additionally, LITAF promoted FOXO1-mediated SIRT1 inhibition, thus regulating cancer stemness and malignant phenotypes. LITAF was silenced in CRC and it participated in the progression of CRC by inhibiting CRC cell stemness, and malignant phenotypes. Therefore, LITAF may serve as a novel biomarker of CRC prognosis.
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This work was supported by the National Natural Science Foundation of China (Grant No. 81974379), the Natural Science Foundation of Shanghai (Grant No. 19ZR1438700) and the Interdisciplinary Program of Shanghai Jiao Tong University (Grant No. ZH2018QNB05).
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Conceptualization, Methodology, and Writing—Original Draft were performed by JG; Formal analysis, Resources, and Investigation were performed by Z-YZ; Formal analysis, Visualization and Data Curation were performed by J-HS; Project administration, Supervision, and Validation were performed by X-PW; Validation, Supervision, and Writing—Review & Editing were performed by Z-QZ and LQ. All authors read and approved the final manuscript.
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Guan, J., Zhang, ZY., Sun, JH. et al. LITAF inhibits colorectal cancer stemness and metastatic behavior by regulating FOXO1-mediated SIRT1 expression. Clin Exp Metastasis 40, 309–320 (2023). https://doi.org/10.1007/s10585-023-10213-x
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DOI: https://doi.org/10.1007/s10585-023-10213-x