{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T10:31:22Z","timestamp":1780396282014,"version":"3.54.1"},"reference-count":30,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2006,5,12]],"date-time":"2006-05-12T00:00:00Z","timestamp":1147392000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Respir Res"],"published-print":{"date-parts":[[2006,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:sec>\n            <jats:title>Background<\/jats:title>\n            <jats:p>Eicosanoid receptors are G-protein-coupled receptors playing an important immunomodulatory role in airway diseases. However, there is little information on the expression of these receptors and their link with eosinophilic inflammation in paranasal sinus diseases. We aimed with this study to investigate the tissue expression of leukotrienes and prostaglandin E2 receptors in chronic rhinosinusitis patients and the link of this regulation with eosinophilic inflammation.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Methods<\/jats:title>\n            <jats:p>Samples were prepared from nasal tissue of patients with chronic rhinosinusitis without nasal polyps (CRS, n = 11), with nasal polyps (CRS-NP, n = 13) and healthy subjects (Controls, n = 6). mRNA expression of CysLT<jats:sub>1<\/jats:sub>, CysLT<jats:sub>2<\/jats:sub>, BLT<jats:sub>1<\/jats:sub>, BLT<jats:sub>2<\/jats:sub>, E-prostanoid receptors (EP<jats:sub>1<\/jats:sub>, EP<jats:sub>2<\/jats:sub>, EP<jats:sub>3<\/jats:sub>, EP<jats:sub>4<\/jats:sub>) and sol-IL-5R\u03b1 was determined by real-time PCR. Concentrations of PGE2, LTC4\/D4\/E4, LTB4 and sol-IL-5R\u03b1 were determined by ELISA and of ECP by ImmunoCap. Protein expression and tissue localization of eicosanoid receptors and activated eosinophils were evaluated by immunohistochemistry.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>CysLT<jats:sub>1<\/jats:sub> mRNA expression was significantly increased in CRS-NP compared to CRS and controls, and CRS compared to controls, whereas CysLT<jats:sub>2<\/jats:sub> mRNA was enhanced in both CRS groups without differences between them. Levels of both receptors correlated to the number of activated eosinophils, sol-IL-5R\u03b1, ECP and LTC<jats:sub>4<\/jats:sub>\/D<jats:sub>4<\/jats:sub>\/E<jats:sub>4<\/jats:sub> concentrations in the disease groups. PGE<jats:sub>2<\/jats:sub> protein concentrations and prostanoid receptors EP<jats:sub>1<\/jats:sub> and EP<jats:sub>3<\/jats:sub> were down-regulated in the CRS-NP tissue vs. CRS and controls, whereas EP<jats:sub>2<\/jats:sub> and EP<jats:sub>4<\/jats:sub> expression was enhanced in CRS and CRS-NP patients vs. controls. No differences in BLT receptors were observed between patients and controls.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>CyLTs receptors are up-regulated in nasal polyp tissue and their expression correlate with eosinophilic inflammation supporting previous results. Eicosanoid receptors mRNA pattern observed suggests that down-regulation of EP<jats:sub>1<\/jats:sub> and EP<jats:sub>3<\/jats:sub> in CRS-NP and up-regulation EP<jats:sub>2<\/jats:sub> and EP<jats:sub>4<\/jats:sub> in CRS and CRS-NP groups may have some role in the development of the diseases and their regulation may not be directly linked to eosinophil activation but involve post-transcriptional events mainly related to other inflammatory cell sources.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/1465-9921-7-75","type":"journal-article","created":{"date-parts":[[2006,5,12]],"date-time":"2006-05-12T18:23:43Z","timestamp":1147458223000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":35,"title":["Expression of eicosanoid receptors subtypes and eosinophilic inflammation: implication on chronic rhinosinusitis"],"prefix":"10.1186","volume":"7","author":[{"given":"Claudina Angela","family":"P\u00e9rez-Novo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cindy","family":"Claeys","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Van Cauwenberge","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claus","family":"Bachert","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2006,5,12]]},"reference":[{"key":"466_CR1_466","doi-asserted-by":"publisher","first-page":"195","DOI":"10.1124\/pr.55.1.8","volume":"55","author":"C Brink","year":"2003","unstructured":"Brink C, Dahlen SE, Drazen J, Evans JF, Hay DW, Nicosia S, Serhan CN, Shimizu T, Yokomizo T: International Union of Pharmacology XXXVII. 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