Journal
CANCER GENOMICS & PROTEOMICS
Volume 16, Issue 6, Pages 409-419Publisher
INT INST ANTICANCER RESEARCH
DOI: 10.21873/cgp.20145
Keywords
MyD88; NF-kappa B/MAPK; LPS; inflammatory; colorectal cancer
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Funding
- National Natural Science Foundation of China [81702424, 81872364]
- Fujian Provincial Health Department Young and Middle-aged Talents Training Project [2018-ZQN-46]
- Joint Funds for the Innovation of Science and Technology, Fujian Province [2017Y9092]
- Project of Science and Technology Research Program in Fujian Province [2016B044]
- Fujian Provincial Natural Science Foundation [2018J05127]
- National Clinical Key Specialty Construction Project (General Surgery) of China
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Background/Aim: Inflammation may play a role in cancer initiation and progression. The molecular mechanisms by which inflammation causes colorectal cancer, remains unclear. The present study investigated a signaling pathway that affects inflammation in colorectal cancer. Materials and Methods: SW480 cells, HCT116 cells, and cells with knockdown of myeloid differentiation 88 (MyD88), and forced expression of MyD88 were treated with lipopolysaccharide (LPS; 1 mu g/ml). Inflammation-related mRNA expression was analyzed by the quantitative reverse transcription polymerase chain reaction and inflammatory cytokines were detected by western blotting. The enzyme-linked immunosorbent assay (ELISA) was used to quantify inflammation-related cytokines in colorectal cancer cells. Cancer cell properties were evaluated using the wound-healing assay, transwell migration assay, transwell invasion assay, colony formation assay, and CCK-8 assay. Results: LPS up-regulated mRNA and protein levels of inflammatory factors in colorectal cancer cells. Knockdown of MyD88 inhibited LPS-induced mRNA expression and inflammatory protein expression in colorectal cancer cells. Similarly, silencing of MyD88 expression suppressed LPS-induced changes in the biological behavior of colorectal cancer cells. Silencing of MyD88 expression down-regulated expression of proteins of the LPS/nuclear factor kappa-light-chain-enhancer of activated B-cells (NF-kappa B)Imitogen-activated protein kinase (MAPK) signaling pathway. Restoration of the expression of MyD88 reversed the effects in LPS-treated HCT116 cells. Conclusion: MyD88-regulated LPS/NF-kappa B/MAPK signaling pathway affects the inflammatory and biological behavior of LPS-induced colorectal cancer cells.
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