Features of complement activation-related pseudoallergy to liposomes with different surface charge and PEGylation

Comparison of the porcine and rat responses

László Dézsi, Tamás Fülöp, T. Mészáros, G. Szénási, Rudolf Urbanics, Csenge Vázsonyi, Erik Orfi, L. Rosivall, Réka Nemes, Robbert Jan Kok, Josbert M. Metselaar, Gert Storm, J. Szebeni

Research output: Contribution to journalArticle

38 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2-10
Number of pages9
JournalJournal of Controlled Release
Volume195
DOIs
Publication statusPublished - Dec 10 2014

Fingerprint

Complement Activation
Liposomes
Swine
Tachyphylaxis
Hypotension
Phospholipids
Nanomedicine
Unilamellar Liposomes
Thromboxane B2
Surface Properties
Leukocytosis
Leukopenia
Platelet Count
Leukocyte Count
Pulmonary Hypertension
Thrombocytopenia
Hypersensitivity
Hemodynamics
Blood Pressure
Injections

Keywords

  • Adverse drug effects
  • Anaphylatoxins
  • Anaphylaxis
  • CARPA
  • Nanomedicines
  • Pseudoallergy

ASJC Scopus subject areas

  • Pharmaceutical Science
  • Medicine(all)

Cite this

Features of complement activation-related pseudoallergy to liposomes with different surface charge and PEGylation : Comparison of the porcine and rat responses. / Dézsi, László; Fülöp, Tamás; Mészáros, T.; Szénási, G.; Urbanics, Rudolf; Vázsonyi, Csenge; Orfi, Erik; Rosivall, L.; Nemes, Réka; Kok, Robbert Jan; Metselaar, Josbert M.; Storm, Gert; Szebeni, J.

In: Journal of Controlled Release, Vol. 195, 10.12.2014, p. 2-10.

Research output: Contribution to journalArticle

Dézsi, László ; Fülöp, Tamás ; Mészáros, T. ; Szénási, G. ; Urbanics, Rudolf ; Vázsonyi, Csenge ; Orfi, Erik ; Rosivall, L. ; Nemes, Réka ; Kok, Robbert Jan ; Metselaar, Josbert M. ; Storm, Gert ; Szebeni, J. / Features of complement activation-related pseudoallergy to liposomes with different surface charge and PEGylation : Comparison of the porcine and rat responses. In: Journal of Controlled Release. 2014 ; Vol. 195. pp. 2-10.
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