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• W2896862728 abstract "The neuromuscular blocking agent (NMBA) rocuronium is a relevant cause of perioperative hypersensitivity (POH) with a significant risk of diagnostic error. Recently, it has been suggested to reclassify hypersensitivity to NMBA as type A reactions resulting from off-target occupation of the nonimmune MRGPRX2 receptor.To investigate whether basophil activation experiments can benefit diagnosis and add to the insights in the pathomechanisms of rocuronium hypersensitivity.A total of 140 patients with a suspected POH to rocuronium in whom peak tryptase was available had complete diagnostic workup for all potential culprits including triple confirmatory testing with skin tests, basophil activation test (BAT), and quantification of specific IgE (sIgE) antibodies to rocuronium and morphine. To further analyze the clinical relevance of sIgE antibodies, quantitative basophil inhibition experiments were performed by coincubation of the cells with rocuronium and morphine, an opiate known to harbor a substituted ammonium structure.Diagnosis of rocuronium hypersensitivity was established in 72 of 140 patients (51.4%), of whom 65 (90.3%) demonstrated mast cell activation. Of the 72 patients, 64 displayed a positive skin test, 8 (11.1%) had their diagnosis documented only by BAT. Coincubation of morphine and rocuronium induced a dose-dependent inhibition of BAT with rocuronium that was restricted to 4 of 6 patients with IgE reactivity to rocuronium and/or morphine.BAT can benefit diagnosis of rocuronium hypersensitivity. As basophils barely express MRGPRX2 and BAT rocuronium can be inhibited by morphine, we believe that hypersensitivity to rocuronium still mainly results from IgE/high-affinity receptor for sIgE (FcεRI)-dependent effector cell activation. However, it cannot be excluded that in a few patients rocuronium hypersensitivity results from off-target occupation of the MRGPRX2 receptor." @default.
• W2896862728 created "2018-10-26" @default.
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• W2896862728 date "2019-03-01" @default.
• W2896862728 modified "2023-09-23" @default.
• W2896862728 title "Rocuronium Hypersensitivity: Does Off-Target Occupation of the MRGPRX2 Receptor Play a Role?" @default.
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• W2896862728 doi "https://doi.org/10.1016/j.jaip.2018.09.034" @default.
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