Abstract
The G protein-coupled histamine H4 receptor (H4R) is the last member of histamine receptors family discovered so far. Its expression pattern, together with postulated involvement in a wide variety of immunological and inflammatory processes make histamine H4 receptor an interesting target for drug development. Potential H4R ligands may provide an innovative therapies for different immuno-based diseases, including allergy, asthma, pruritus associated with allergy or autoimmune skin conditions, rheumatoid arthritis and pain. However, none of successfully developed selective and potent histamine H4 receptor ligands have been introduced to the market up to date. For that reason there is still a strong demand for pharmacological models to be used in studies on potent H4R ligands. In current work we present the development of novel mammalian cell line, stably expressing human histamine H4 receptor, with use of retroviral transduction approach. Obtained cell line was pharmacologically characterized in radioligand binding studies and its utility for affinity testing of potent receptor ligands was confirmed in comparative studies with the use of relevant insect cells expression model. Obtained results allow for statement that developed cellular model may be successfully employed in search for new compounds active at histamine H4 receptor.
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