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Changes in CXCL12/CXCR4-chemokine expression during onset of colorectal malignancies

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Tumor Biology

Abstract

Chemokines have been proposed to contribute to tumour growth and metastatic spread of several cancer entities. Here, we examined the relative levels of CXCL12/CXCR4 in resection specimens from patients with different malignant and non-malignant colorectal diseases as well as colorectal liver metastases (CRLM). CXCL12/CXCR4 mRNA and protein expression profiles were assessed by quantitative real-time PCR, Western blot analysis, enzyme-linked immunosorbent assay (ELISA) and immunohistochemistry in resection specimens from patients with ulcerative colitis (UC; n = 15), colorectal adenoma (CRA; n = 15), colorectal adenocarcinoma (CRC; n = 47) and CRLM (n = 16). Corresponding non-affected tissues served as control. In contrast to UC tissues, CXCL12 showed a distinct down-regulation in CRA, CRC and CRLM specimens, whereas the corresponding receptor CXCR4 demonstrated a significant up-regulation in CRC and CRLM related to corresponding non-affected tissues (p < 0.05, respectively). Our results strongly suggest an association between CXCL12/CXCR4 expression and the induction of CRA, CRC and the development of CRLM. Therefore, CXCR4 may be a potential target for specific therapeutic interventions.

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Acknowledgments

We thank C. Blinn, B. Kruse and C. Weber for excellent technical assistance.

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Correspondence to Vilma Oliveira Frick.

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Oliveira Frick, V., Rubie, C., Ghadjar, P. et al. Changes in CXCL12/CXCR4-chemokine expression during onset of colorectal malignancies. Tumor Biol. 32, 189–196 (2011). https://doi.org/10.1007/s13277-010-0112-y

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  • DOI: https://doi.org/10.1007/s13277-010-0112-y

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