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dc.contributor.author Dézsi László
dc.contributor.author Fülöp Tamás
dc.contributor.author Mészáros Tamás
dc.contributor.author Szénási Gábor
dc.contributor.author Urbanics Rudolf
dc.contributor.author Vázsonyi Csenge
dc.contributor.author Őrfi Erik
dc.contributor.author Rosivall László
dc.contributor.author Nemes Réka
dc.contributor.author Kok Robert Jan
dc.contributor.author Metselaar Josbert M
dc.contributor.author Storm Gert
dc.contributor.author Szebeni János
dc.date.accessioned 2017-01-17T09:22:37Z
dc.date.available 2017-01-17T09:22:37Z
dc.date.issued 2014
dc.identifier 84908503105
dc.identifier.citation pagination=2-10; journalVolume=195; journalTitle=JOURNAL OF CONTROLLED RELEASE;
dc.identifier.uri http://repo.lib.semmelweis.hu//handle/123456789/2529
dc.identifier.uri doi:10.1016/j.jconrel.2014.08.009
dc.description.abstract Pigs are known to provide a sensitive model for studying complement (C) activation-related pseudoallergy (CARPA), a hypersensitivity reaction to liposomal and many other nanomedicines that limits their clinical use. The utility of rats as a CARPA model has, however, not been analyzed to date in detail. The present study compared the two models by inducing CARPA with i.v. bolus injections of two reactogenic liposomes that differed from each other in surface properties: one was AmBisome, a strong anionic, free-surface small unilamellar liposome (SUV), while the other was neutral, polyethylene glycol (PEG)-grafted SUV wherein the 2 kDa-PEG was anchored to the membrane via cholesterol (Chol-PEG). Both in pigs and rats AmBisome caused significant consumption of C3, indicating C activation, along with paralleling massive changes in blood pressure, white blood cell, platelet counts and in plasma thromboxane B2 levels, indicating CARPA. These processes were similar in the two species in terms of kinetics, but significantly differed in the doses that caused major hemodynamic changes (~ 0.01 and ~ 22 mg phospholipid (PL)/kg in pigs and rats, respectively). Pigs responded to AmBisome with pulmonary hypertension and systemic hypotension, and the reaction was not tachyphylactic. The major response of rats was systemic hypotension, leukopenia followed by leukocytosis, and thrombocytopenia. Chol-PEG liposomes caused severe reaction in pigs at 0.1 mg/kg, while the reaction they caused in rats was mild even at 300 mg PL/kg. Importantly, the reaction to Chol-PEG in pigs was partly tachyphylactic. These observations highlight fundamental differences in the immune mechanisms of porcine and rat CARPA, and also show a major impact of liposome surface characteristics, determining the presence or absence of tachyphylaxis. The data suggest that rats are 2-3 orders of magnitude less sensitive to liposomal CARPA than pigs; however, the causes of these differences, the PEG-dependent tachyphylaxis and the massive reactivity of Chol-PEG liposomes remain unclear. © 2014 Elsevier B.V. All rights reserved.
dc.relation.ispartof urn:issn:0168-3659
dc.title Features of complement activation-related pseudoallergy to liposomes with different surface charge and PEGylation: Comparison of the porcine and rat responses
dc.type Journal Article
dc.date.updated 2015-11-23T12:20:34Z
dc.language.rfc3066 en
dc.identifier.mtmt 2745559
dc.identifier.wos 000344230500002
dc.identifier.pubmed 25148822
dc.contributor.department SE/AOK/I/Kórélettani Intézet
dc.contributor.department SE/KSZE/Nanomedicina Kutatási és Oktatási Központ
dc.contributor.institution Semmelweis Egyetem


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