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Correlation of IL-8 with induction, progression and metastatic potential of colorectal cancer

World Journal of Gastroenterology 2007年第37期13卷 4996-5002页

作者： Claudia Rubie Vilma Oliveira Frick sandra pfeil Mathias Wagner Otto Kollmar Berit Kopp Stefan Grber Bettina M Rau Martin K Schilling Department of General Visceral Vascular and Paediatric Surgery University of the Saarland Homburg 66421 Germany Institute of Pathology University of the Saarland Homburg 66421 Germany Institute of Medical Biometrics Epidemiology and Medical Informatics University of the Saarland Homburg 66421 Germany

AIM： To investigate the expression profile of IL-8 in inflammatory and malignant colorectal diseases to evaluate its potential role in the regulation of colorectal cancer （CRC） and the development of colorectal liver metastases （CRLM）.METHODS： IL-8 expression was assessed by quantitative real-time PCR （Q-RT-PCR） and the enzyme-linked immunosorbent assay （ELISA） in resected specimens from patients with ulcerative colitis （UC, n = 6） colorectal adenomas （CRA, n = 8）, different stages of colorectal cancer （n = 48） as well as synchronous and metachronous CRLM along with their corresponding primary colorectal tumors （n = 16）.RESULTS： IL-8 mRNA and protein expression was significantly up-regulated in all pathological colorectal entities investigated compared with the corresponding neighboring tissues. However, in the CRC specimens IL-8 revealed a significantly more pronounced overexpression in relation to the CRA and UC tissues with an average 30-fold IL-8 protein up-regulation in the CRC specimens in comparison to the CRA tissues. Moreover, [L-8 expression revealed a close correlation with tumor grading. Most interestingly, IL-8 up-regulation was most enhanced in synchronous and metachronous CRLM, if compared with the corresponding primary CRC tissues. Herein, an up to 80-fold IL-8 overexpression in individual metachronous metastases compared to normal tumor neighbor tissues was found.CONCLUSION： Our results strongly suggest an association between IL-8 expression, induction and progression of colorectal carcinoma and the development of colorectal liver metastases.

关键词： Interleukin-8 Gene expression profiling RNA and protein expressioni Colorec cal cancer Colorectalliver metastases

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