{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T05:14:48Z","timestamp":1790745288585,"version":"4.1.0"},"reference-count":15,"publisher":"Public Library of Science (PLoS)","issue":"8","license":[{"start":{"date-parts":[[2021,8,13]],"date-time":"2021-08-13T00:00:00Z","timestamp":1628812800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100017244","name":"Wojskowy Instytut Medyczny","doi-asserted-by":"crossref","award":["5\/8953"],"award-info":[{"award-number":["5\/8953"]}],"id":[{"id":"10.13039\/501100017244","id-type":"DOI","asserted-by":"crossref"}]},{"name":"military institute of medicine, szaser\u00f3w str. 128","award":["04-141"],"award-info":[{"award-number":["04-141"]}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n<jats:title>Introduction<\/jats:title>\n<jats:p>Platelet-activating factor (PAF) has a direct role as a mediator in the pathogenesis of various disorders with an inflammatory component, including those with allergic aetiology. The peripheral blood concentration of PAF is dynamically regulated by plasma PAF acetylhydrolase (PAF-AH). Previous research suggest that low activity of plasma PAF-AH could be a predictive marker for increased severity of some types of allergic hypersensitivity reactions\u2013especially anaphylaxis. The purpose of the study was to evaluate the association between plasma PAF-AH activity and severity in patients with anaphylactic reactions following a wasp or bee sting.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec002\">\n<jats:title>Materials and methods<\/jats:title>\n<jats:p>The study group of 89 patients was divided into two subgroups depending on the increasing severity of the most severe anaphylactic reaction in the past, which was assessed according to the M\u00fcller\u2019s scale. The first subgroup included participants with a history of hypersensitivity reactions up to grade II. The second subgroup consisted of patients who have experienced at least one grade III or IV reactions in the past. A control group of 20 people was established. Plasma PAF-AH activity was measured using a colorimetric method.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec003\">\n<jats:title>Results<\/jats:title>\n<jats:p>It has been observed that plasma activity of platelet-activating factor acetylhydrolase was significantly lower in patients with anaphylaxis history compared to the control group with negative atopic history (on average 21.38 nmol\/min\/ml for the control group, 9.47 nmol\/min\/ml for the first subgroup and 10.16 nmol\/min\/ml for the second subgroup, in both cases p &lt; 0.0001).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec004\">\n<jats:title>Conclusion<\/jats:title>\n<jats:p>The plasma activity of PAF-AH is a promising parameter that can help to distinguish a group of patients not threatened with development of anaphylaxis and not requiring laborious or expensive prophylactic procedures.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0256168","type":"journal-article","created":{"date-parts":[[2021,8,13]],"date-time":"2021-08-13T17:30:40Z","timestamp":1628875840000},"page":"e0256168","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":20,"title":["Clinical significance of plasma PAF acetylhydrolase activity measurements as a biomarker of anaphylaxis: Cross-sectional study"],"prefix":"10.1371","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2755-050X","authenticated-orcid":true,"given":"Krzysztof \u0141ukasz","family":"Piwowarek","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Agnieszka","family":"Rzeszotarska","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jolanta \u0141ukasz","family":"Korsak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aleksandra","family":"Juszkiewicz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrzej","family":"Chcia\u0142owski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jerzy","family":"Kruszewski","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2021,8,13]]},"reference":[{"issue":"6","key":"pone.0256168.ref001","doi-asserted-by":"crossref","first-page":"1356","DOI":"10.1084\/jem.136.6.1356","article-title":"Leukocyte-dependent histamine release from rabbit platelets. The role of IgE, basophils, and a platelet-activating factor","volume":"136","author":"J Benveniste","year":"1972","journal-title":"J Exp Med"},{"issue":"2","key":"pone.0256168.ref002","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1016\/j.lfs.2014.09.010","article-title":"Mouse anaphylactic shock is caused by reduced cardiac output, but not by systemic vasodilatation or pulmonary vasoconstriction, via PAF and histamine","volume":"116","author":"M Wang","year":"2014","journal-title":"Life Sci"},{"issue":"1","key":"pone.0256168.ref003","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1016\/j.jaci.2012.08.016","article-title":"Platelet-activating factor, histamine, and tryptase levels in human anaphylaxis","volume":"131","author":"P Vadas","year":"2013","journal-title":"J Allergy Clin Immunol"},{"issue":"3","key":"pone.0256168.ref004","doi-asserted-by":"crossref","first-page":"318","DOI":"10.1016\/0090-1229(80)90044-6","article-title":"Preliminary studies of an acid-labile factor (ALF) in human sera that inactivates platelet-activating factor (PAF)","volume":"15","author":"RS Farr","year":"1980","journal-title":"Clin Immunol Immunopathol"},{"issue":"9","key":"pone.0256168.ref005","doi-asserted-by":"crossref","first-page":"4215","DOI":"10.1016\/S0021-9258(18)61335-3","article-title":"Human plasma platelet-activating factor acetylhydrolase. 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