TAILIEUCHUNG - Báo cáo sinh học: " CXC receptor-4 mRNA silencing abrogates CXCL12induced migration of colorectal cancer cells"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: CXC receptor-4 mRNA silencing abrogates CXCL12induced migration of colorectal cancer cells | Rubie et al. Journal of Translational Medicine 2011 9 22 http content 9 1 22 TRANSLATIONAL MEDICINE RESEARCH Open Access CXC receptor-4 mRNA silencing abrogates CXCL12-induced migration of colorectal cancer cells 1 t 11 2 3 1 1 Claudia Rubie Vilma O Frick Pirus Ghadjar Mathias Wagner Christoph Justinger Sabrina K Faust Benjamin Vicinus1 Stefan Graber4 Otto Kollmar1 Martin K Schilling1 Abstract Background Interactions between CXCR4 and its ligand CXCL12 have been shown to be involved in cancer progression in colorectal cancer CRC . We performed a comparative CXCL12 CXCR4 expression analysis and assessed the effect of external CXCL12 stimulation on migration of CRC cells without and with CXCR4 inhibition. Methods Expression of CXCL12 CXCR4 was assessed by quantitative real-time PCR ELISA and immunohistochemistry in resection specimens of 50 CRC patients as well as in the corresponding normal tissues and in three human CRC cell lines with different metastatic potential Caco-2 SW480 and HT-29 . Migration assays were performed after stimulation with CXCL12 and CXCR4 was inhibited by siRNA and neutralizing antibodies. Results In CRC tissues CXCL12 was significantly down-regulated and CXCR4 was significantly up-regulated compared to the corresponding normal tissues. In cell lines CXCR4 was predominantly expressed in SW480 and less pronounced in HT-29 cells. CXCL12 was only detectable in Caco-2 cells. CXCL12 stimulation had no impact on Caco-2 cells but significantly increased migration of CXCR4 bearing SW480 and HT-29 cells. This effect was significantly abrogated by neutralizing anti-CXCR4 antibody as well as by CXCR4 siRNAs P . Conclusions CXCR4 expression was up-regulated in CRC and CXCL12 stimulation increased migration in CXCR4 bearing cell lines. Migration was inhibited by both neutralizing CXCR4 antibodies and CXCR4 siRNAs. Thus the expression and functionality of CXCR4 might be associated with the metastatic potential of CRC .

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