High expression of Toll-like receptor 4 myeloid differentiation factor 88 signals correlates with poor prognosis in colorectal cancer

The Toll-like receptor (TLR) 4 signalling pathway has been shown to have oncogenic effects in vitro and in vivo. To demonstrate the role of TLR4 signalling in colon tumourigenesis, we examined the expression of TLR4 and myeloid differentiation factor 88 (MyD88) in colorectal cancer (CRC). The expres...

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Bibliographic Details
Published in:British journal of cancer 2010-03, Vol.102 (5), p.908-915
Main Authors: WANG, E. L, QIAN, Z. R, NAKASONO, M, TANAHASHI, T, YOSHIMOTO, K, BANDO, Y, KUDO, E, SHIMADA, M, SANO, T
Format: Article
Language:English
Subjects:
Adenocarcinoma, Mucinous - metabolism
Adenocarcinoma, Mucinous - secondary
Aged
Biological and medical sciences
Biomarkers, Tumor - metabolism
Cancer research
Colon - metabolism
Colon - pathology
Colorectal cancer
Colorectal Neoplasms - metabolism
Colorectal Neoplasms - pathology
Female
Follow-Up Studies
Gastroenterology. Liver. Pancreas. Abdomen
Hospitals
Humans
Immunoenzyme Techniques
Inflammatory bowel disease
Kinases
Liver
Liver Neoplasms - metabolism
Liver Neoplasms - secondary
Male
Medical prognosis
Medical research
Medical sciences
Metastasis
Molecular Diagnostics
Myeloid Differentiation Factor 88 - metabolism
Neoplasm Invasiveness
Neoplasm Recurrence, Local - metabolism
Neoplasm Recurrence, Local - pathology
Pathology
Peritoneal Neoplasms - metabolism
Peritoneal Neoplasms - secondary
Prognosis
Protein expression
Proteins
Rectum - metabolism
Rectum - pathology
Stomach. Duodenum. Small intestine. Colon. Rectum. Anus
Surgery
Survival Rate
Toll-Like Receptor 4 - metabolism
Tumors
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Summary:The Toll-like receptor (TLR) 4 signalling pathway has been shown to have oncogenic effects in vitro and in vivo. To demonstrate the role of TLR4 signalling in colon tumourigenesis, we examined the expression of TLR4 and myeloid differentiation factor 88 (MyD88) in colorectal cancer (CRC). The expression of TLR4 and MyD88 in 108 CRC samples, 15 adenomas, and 15 normal mucosae was evaluated by immunohistochemistry, and the correlations between their immunoscores and clinicopathological variables, including disease-free survival (DFS) and overall survival (OS), were analysed. Compared with normal mucosae and adenomas, 20% cancers displayed high expression of TLR4, and 23% cancers showed high expression of MyD88. The high expression of TLR4 and MyD88 was significantly correlated with liver metastasis (P=0.0001, P=0.0054). In univariate analysis, the high expression of TLR4 was significantly associated with shorter OS (hazard ratio (HR): 2.17; 95% confidence interval (95% CI): 1.15-4.07; P=0.015). The high expression of MyD88 expression was significantly associated with poor DFS and OS (HR: 2.33; 95% CI: 1.31-4.13; P=0.0038 and HR: 3.03; 95% CI: 1.67-5.48; P=0.0002). The high combined expression of TLR4 and MyD88 was also significantly associated with poor DFS and OS (HR: 2.25; 95% CI: 1.27-3.99; P=0.0053 and HR: 2.97; 95% CI: 1.64-5.38; P=0.0003). Multivariate analysis showed that high expressions of TLR4 (OS: adjusted HR: 1.88; 95% CI: 0.99-3.55; P=0.0298) and MyD88 (DFS: adjusted HR: 1.93; 95% CI: 1.01-3.67; P=0.0441; OS: adjusted HR: 2.25; 95% CI: 1.17-4.33; P=0.0112) were independent prognostic factors of OS. Furthermore, high co-expression of TLR4/MyD88 was strongly associated with both poor DFS and OS. Our findings suggest that high expression of TLR4 and MyD88 is associated with liver metastasis and is an independent predictor of poor prognosis in patients with CRC.
ISSN:0007-0920
1532-1827
DOI:10.1038/sj.bjc.6605558