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Herein we report on the pharmacological properties (potency, affinity and efficacy) of the new compound, 14-O-methylmorphine (14-O-MeM) in in vitro. Additionally, we also investigated the antinociceptive effect of the novel compound, as well as its inhibitory action on gastrointestinal transit in in vivo. The potency and efficacy of test compound were measured by [35S]GTPgammaS binding, isolated mouse vas deferens (MVD) and rat vas deferens (RVD) assays. The affinity of 14-O-MeM for opioid receptors was assessed by radioligand binding and MVD assays. The antinociceptive and gastrointestinal effects of the novel compound were evaluated in the rat tail-flick test and charcoal meal test, respectively. Morphine, DAMGO, Ile5,6 deltorphin II, deltorphin II and U-69593 were used as reference compounds. 14-O-MeM showed higher efficacy (Emax) and potency (EC50) than morphine in MVD, RVD or [35S]GTPgammaS binding. In addition, 14-O-MeM compared to morphine showed higher affinity for mu-opioid receptor (MOR). In vivo, in rat tail-flick test 14-O-MeM proved to be stronger antinociceptive agent than morphine after peripheral or central administration. Additionally, both compounds inhibited the gastrointestinal peristalsis. However, when the antinociceptive and antitransit doses for each test compound are compared, 14-O-MeM proved to have slightly more favorable pharmacological profile. Our results affirm that 14-O-MeM, an opioid of high efficacy and affinity for MOR can be considered as a novel analgesic agent of potential clinical value.", "subjects" : [ { "otype" : "Classification", "mtid" : 12125, "link" : "/api/classification/12125", "label" : "Általános orvostudomány", "published" : true, "snippet" : true } ], "digital" : null, "printed" : null, "sourceYear" : 2017, "packet" : "641067", "foreignEdition" : true, "foreignLanguage" : true, "fullPublication" : true, "conferencePublication" : false, "nationalOrigin" : true, "missingAuthor" : false, "oaType" : "RESTRICTED", "oaCheckDate" : "2024-03-25", "oaFree" : false, "citationCount" : 7, "citationCountUnpublished" : 0, "citationCountWoOther" : 7, "independentCitCountWoOther" : 3, "nationalOriginCitationCount" : 4, "foreignEditionCitationCount" : 7, "doiCitationCount" : 7, "wosCitationCount" : 7, "scopusCitationCount" : 7, "wosScopusCitationCount" : 7, "wosScopusCitationCountWoOther" : 7, "wosScopusIndependentCitationCount" : 3, "wosScopusIndependentCitationCountWoOther" : 3, "independentCitationCount" : 3, "selfCitationCount" : 4, "unhandledCitationCount" : 0, "citingPubCount" : 7, "independentCitingPubCount" : 3, "citingPubCountWoOther" : 7, "independentCitingPubCountWoOther" : 3, "unhandledCitingPubCount" : 0, "citedPubCount" : 16, "citedCount" : 16, "pubStats" : { "types" : [ { "type" : "Folyóiratcikk", "typeEng" : "Journal Article", "code" : 24, "count" : 7 }, { "type" : "Könyvrészlet", "typeEng" : "Chapter in Book", "code" : 25, "count" : 0 }, { "type" : "Könyv", "typeEng" : "Book", "code" : 23, "count" : 0 }, { "type" : "Egyéb konferenciaközlemény", "typeEng" : "Conference paper", "code" : 31, "count" : 0 }, { "type" : "Egyéb konferenciakötet", "typeEng" : "Conference proceedings", "code" : 32, "count" : 0 }, { "type" : "Oltalmi formák", "typeEng" : "Protection forms", "code" : 26, "count" : 0 }, { "type" : "Disszertáció", "typeEng" : "Thesis", "code" : 28, "count" : 0 }, { "type" : "Egyéb", "typeEng" : "Miscellaneous", "code" : 29, "count" : 0 }, { "type" : "Alkotás", "typeEng" : "Achievement", "code" : 22, "count" : 0 }, { "type" : "Kutatási adat", "typeEng" : "Research data", "code" : 33, "count" : 0 } ], "citationTypes" : [ { "type" : "Folyóiratcikk", "typeEng" : "Journal Article", "code" : 24, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Könyvrészlet", "typeEng" : "Chapter in Book", "code" : 25, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Könyv", "typeEng" : "Book", "code" : 23, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Egyéb konferenciaközlemény", "typeEng" : "Conference paper", "code" : 31, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Egyéb konferenciakötet", "typeEng" : "Conference proceedings", "code" : 32, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Oltalmi formák", "typeEng" : "Protection forms", "code" : 26, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Disszertáció", "typeEng" : "Thesis", "code" : 28, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Egyéb", "typeEng" : "Miscellaneous", "code" : 29, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Alkotás", "typeEng" : "Achievement", "code" : 22, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 }, { "type" : "Kutatási adat", "typeEng" : "Research data", "code" : 33, "countUnknown" : 0, "countIndependent" : 0, "countSelfCitation" : 0 } ], "years" : [ { "year" : 2019, "publicationCount" : 0, "citationCount" : 1, "independentCitationCount" : 0, "citingPubCount" : 1, "independentCitingPubCount" : 0, "oaStats" : null, "oaStats2" : null }, { "year" : 2020, "publicationCount" : 0, "citationCount" : 2, "independentCitationCount" : 1, "citingPubCount" : 2, "independentCitingPubCount" : 1, "oaStats" : null, "oaStats2" : null }, { "year" : 2021, "publicationCount" : 0, "citationCount" : 1, "independentCitationCount" : 1, "citingPubCount" : 1, "independentCitingPubCount" : 1, "oaStats" : null, "oaStats2" : null }, { "year" : 2022, "publicationCount" : 0, "citationCount" : 1, "independentCitationCount" : 1, "citingPubCount" : 1, "independentCitingPubCount" : 1, "oaStats" : null, "oaStats2" : null }, { "year" : 2023, "publicationCount" : 0, "citationCount" : 2, "independentCitationCount" : 0, "citingPubCount" : 2, "independentCitingPubCount" : 0, "oaStats" : null, "oaStats2" : null } ] }, "ratings" : [ { "otype" : "SjrRating", "mtid" : 10721138, "link" : "/api/sjrrating/10721138", "label" : "sjr:Q2 (2017) Scopus - 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