Investigation of antigen delivery route in vivo and immune-boosting effects mediated by pH-sensitive liposomes encapsulated with Kb-restricted CTL epitope

Ki Young Lee, Eunyoung Chun, Baik Lin Seong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Using fluorescein isothiocyanate (FITC)-conjugated H-2Kb CTL epitope (SIINFEKL) as a model system, we investigated the antigen delivery route by pH-sensitive liposomes in vivo. Fluorescence was initially detected in lymph nodes at 3 h after immunization, and its intensity reached a peak value in superticial inguinal lymph node at 9 h. No trace could be detected in spleen even with prolonged monitoring for up to 24 h. These results strongly suggest that the presentation of CTL-peptide antigen vehicled by pH-sensitive liposomes exclusively occurs in lymph nodes. In mice immunized with the H-2Kb CTL epitope encapsulated pH-sensitive liposomes, peptide-specific CTL response was detected at day 3. The response was strongly augmented by the second immunization and persisted up to at least 45 days. These results suggest that pH-sensitive liposome formula functions as a potential adjuvant of peptide antigens and is useful for the induction of antigen specific CTLsv in vivo.

Original languageEnglish
Pages (from-to)682-688
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume292
Issue number3
DOIs
Publication statusPublished - 2002 Jan 1

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Liposomes
Epitopes
Immunization
Antigens
Lymph Nodes
Peptides
Groin
Fluorescein
Spleen
Fluorescence
Monitoring

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

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abstract = "Using fluorescein isothiocyanate (FITC)-conjugated H-2Kb CTL epitope (SIINFEKL) as a model system, we investigated the antigen delivery route by pH-sensitive liposomes in vivo. Fluorescence was initially detected in lymph nodes at 3 h after immunization, and its intensity reached a peak value in superticial inguinal lymph node at 9 h. No trace could be detected in spleen even with prolonged monitoring for up to 24 h. These results strongly suggest that the presentation of CTL-peptide antigen vehicled by pH-sensitive liposomes exclusively occurs in lymph nodes. In mice immunized with the H-2Kb CTL epitope encapsulated pH-sensitive liposomes, peptide-specific CTL response was detected at day 3. The response was strongly augmented by the second immunization and persisted up to at least 45 days. These results suggest that pH-sensitive liposome formula functions as a potential adjuvant of peptide antigens and is useful for the induction of antigen specific CTLsv in vivo.",
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