Fusogenic properties of Sendai virosome envelopes in rat brain preparations

Christopher M. de Fiebre, Sean O. Bryant, Dean Notabartolo, Ping Wu, Edwin M. Meyer

Research output: Contribution to journalArticle

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Abstract

Sendai virosomes were characrerized with respect to their ability to bind to, fuse with, and introduce substances into several rat brain preparations. Encapsulation efficiency for Sendai virosomes was enhanced but binding to cerebral cortical P2 preparations was attenuated by addition of bovine brain phosphatidylcholine during reconstitution. A higher percentage of Sendai virosomes than phosphatidylcholine liposomes appeared to bind to, fuse with and subsequently deliver [14C]sucrose into osmotically labile pools of the P2 preparation. Fusogenic activity was estimated by measuring dequenching of fluorescently labelled N-NBD-phosphatidylethanolamine. More virosomally encapsulated [14C]sucrose was bound to the P2 fraction than introduced into osmotically labile organelles, and the fraction of vesicles undergoing fusion was intermediate between these two values. Non-encapsulated [14C]sucrose did not bind to and was not taken up by the P2 fraction in a quantifiable manner. Virosomal envelopes also bound to primary cultures of rat brain neurons and glia in an apparently saturable manner. Addition of increasing amounts of the adenoassociated virus-derived vector pJDT95 increased encapsulation efficiency, and virosomes reconstituted in the presence of 60 μg DNA retained most of their binding activity (5.4% of total label) compared to those containing [14C]sucrose alone (8.4%). These data indicate that Sendai virosomes may be useful in the delivery of substances into brain-derived tissues, potentially for the modulation of gene expression and neurotransmission.

Original languageEnglish (US)
Pages (from-to)1089-1094
Number of pages6
JournalNeurochemical Research
Volume18
Issue number10
DOIs
StatePublished - Oct 1 1993

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Keywords

  • Sendai virosomes
  • fusion
  • primary glial cultures
  • primary neuronal cultures

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience

Cite this

de Fiebre, C. M., Bryant, S. O., Notabartolo, D., Wu, P., & Meyer, E. M. (1993). Fusogenic properties of Sendai virosome envelopes in rat brain preparations. Neurochemical Research, 18(10), 1089-1094. https://doi.org/10.1007/BF00966689