Chemokines are a large family of cytokines with a wide variety of biological actions. Originally, they were identified as controllers of the routine trafficking of immune cells, and directed migration of cells during inflammatory response - from which they get their name, a contraction of chemotactic cytokines. They are now also known to be active in angiogenesis, embryonic development and infection by viruses such as HIV-1. Studies with antibodies, modified chemokine and transgenic mice suggest that chemokine receptor antagonists may be selective anti-inflammatory, antiviral or immunomodulatory agents. Small-molecule antagonists of seven of the receptors have been reported, some with potency in the low nanomolar range. These compounds are shown to be active in cell biology assays; the next step will be to determine their efficacy in animal models of disease.
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