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Abstract
CXCL5, epithelial cell derived neutrophil attractant 78, is a CXC chemokine predominantly expressed on epithelial cells. It has specificity for CXCR2 receptors and is involved in the recruitment and activation of neutrophils. CXCL5 is considered a therapeutic target in liver cancer, since treatment with small-interfering RNAs or antibodies against CXCL5 can suppress tumor growth, proliferation, migration and invasion. Experimental evidence demonstrated that CXCL5 antibodies could reduce the tumor growth and synergistically increase the efficiency of the tyrosine kinase inhibitor, Gefitinib, without the addition of toxicity. A number of challenges are encountered and should be considered during the development and clinical application of CXCL5 target-specific drugs. The specificity of CXCL5 as a therapeutic target for certain types and duration of cancer should be more carefully clarified, since it seems that CXCL5 is involved in many molecular pathways and crosstalk between targeted chemokines/receptors. The concept that CXCL5 serves as the therapeutic target for liver cancer was evidenced by preclinical studies, and is the beginning of CXCL5-based drug discovery and development.
Acknowledgments
We would like to acknowledge M He for help with data collection.
Declaration of interest
The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.