Serotonin 5-Hydroxytryptamine2A Receptor Activation Suppresses Tumor Necrosis Factor-alpha-Induced Inflammation with Extraordinary Potency Export

@article{citeulike:3988479, abstract = {The G protein-coupled serotonin 5-hydroxytryptamine (5-HT)2A receptor is primarily recognized for its role in brain neurotransmission, where it mediates a wide variety of functions, including certain aspects of cognition. However, there is significant expression of this receptor in peripheral tissues, where its importance is largely unknown. We have now discovered that activation of 5-HT2A receptors in primary aortic smooth muscle cells provides a previously unknown and extremely potent inhibition of tumor necrosis factor (TNF)-{alpha}-mediated inflammation. 5-HT2A receptor stimulation with the agonist (R)-1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane [(R)-DOI] rapidly inhibits a variety of TNF-{alpha}-mediated proinflammatory markers, including intracellular adhesion molecule 1 (ICAM-1), vascular adhesion molecule 1 (VCAM-1), and interleukin (IL)-6 gene expression, nitric-oxide synthase activity, and nuclear translocation of nuclear factor {kappa}B, with IC50 values of only 10 to 20 pM. It is significant that proinflammatory markers can also be inhibited by (R)-DOI hours after treatment with TNF-{alpha}. With the exception of a few natural toxins, no current drugs or small molecule therapeutics demonstrate a comparable potency for any physiological effect. TNF-{alpha}-mediated inflammatory pathways have been strongly implicated in a number of diseases, including atherosclerosis, rheumatoid arthritis, psoriasis, type II diabetes, depression, schizophrenia, and Alzheimer's disease. Our results indicate that activation of 5-HT2A receptors represents a novel, and extraordinarily potent, potential therapeutic avenue for the treatment of disorders involving TNF-{alpha}-mediated inflammation. Note that because (R)-DOI can significantly inhibit the effects of TNF-{alpha} many hours after the administration of TNF-{alpha}, potential therapies could be aimed not only at preventing inflammation but also treating inflammatory injury that has already occurred or is ongoing. 10.1124/jpet.108.143461}, author = {Yu, Bangning and Becnel, Jaime and Zerfaoui, Mourad and Rohatgi, Rasika and Boulares, Hamid A. and Nichols, Charles D.}, citeulike-article-id = {3988479}, citeulike-linkout-0 = {http://dx.doi.org/10.1124/jpet.108.143461}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/18708586}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=18708586}, day = {1}, doi = {10.1124/jpet.108.143461}, journal = {J Pharmacol Exp Ther}, keywords = {5ht-2a, antiinflammatories, doi, inflammation, tnf, tnf-, tumor\_necrosis\_factor}, month = {November}, number = {2}, pages = {316--323}, posted-at = {2009-01-31 21:53:01}, priority = {0}, title = {Serotonin 5-Hydroxytryptamine2A Receptor Activation Suppresses Tumor Necrosis Factor-{alpha}-Induced Inflammation with Extraordinary Potency}, url = {http://dx.doi.org/10.1124/jpet.108.143461}, volume = {327}, year = {2008} }

TY - JOUR ID - citeulike:3988479 L3 - citeulike-article-id:3988479 N2 - The G protein-coupled serotonin 5-hydroxytryptamine (5-HT)2A receptor is primarily recognized for its role in brain neurotransmission, where it mediates a wide variety of functions, including certain aspects of cognition. However, there is significant expression of this receptor in peripheral tissues, where its importance is largely unknown. We have now discovered that activation of 5-HT2A receptors in primary aortic smooth muscle cells provides a previously unknown and extremely potent inhibition of tumor necrosis factor (TNF)-{alpha}-mediated inflammation. 5-HT2A receptor stimulation with the agonist (R)-1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane [(R)-DOI] rapidly inhibits a variety of TNF-{alpha}-mediated proinflammatory markers, including intracellular adhesion molecule 1 (ICAM-1), vascular adhesion molecule 1 (VCAM-1), and interleukin (IL)-6 gene expression, nitric-oxide synthase activity, and nuclear translocation of nuclear factor {kappa}B, with IC50 values of only 10 to 20 pM. It is significant that proinflammatory markers can also be inhibited by (R)-DOI hours after treatment with TNF-{alpha}. With the exception of a few natural toxins, no current drugs or small molecule therapeutics demonstrate a comparable potency for any physiological effect. TNF-{alpha}-mediated inflammatory pathways have been strongly implicated in a number of diseases, including atherosclerosis, rheumatoid arthritis, psoriasis, type II diabetes, depression, schizophrenia, and Alzheimer's disease. Our results indicate that activation of 5-HT2A receptors represents a novel, and extraordinarily potent, potential therapeutic avenue for the treatment of disorders involving TNF-{alpha}-mediated inflammation. Note that because (R)-DOI can significantly inhibit the effects of TNF-{alpha} many hours after the administration of TNF-{alpha}, potential therapies could be aimed not only at preventing inflammation but also treating inflammatory injury that has already occurred or is ongoing. 10.1124/jpet.108.143461 IS - 2 JF - J Pharmacol Exp Ther EP - 323 TI - Serotonin 5-Hydroxytryptamine2A Receptor Activation Suppresses Tumor Necrosis Factor-{alpha}-Induced Inflammation with Extraordinary Potency VL - 327 SP - 316 KW - 5ht-2a KW - antiinflammatories KW - doi KW - inflammation KW - tnf KW - tnf- KW - tumor_necrosis_factor AU - Yu, Bangning AU - Becnel, Jaime AU - Zerfaoui, Mourad AU - Rohatgi, Rasika AU - Boulares, Hamid AU - Nichols, Charles PY - 2008/11/01/ UR - http://dx.doi.org/10.1124/jpet.108.143461 ER -