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M9480106.TXT
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Document 0106
DOCN M9480106
TI Effect of MTP-PE liposomes and interleukin-7 on induction of antibody
and cell-mediated immune responses to a recombinant HIV-envelope
protein.
DT 9410
AU Bui T; Dykers T; Hu SL; Faltynek CR; Ho RJ; Department of Pharmaceutics,
University of Washington, Seattle; 98195.
SO J Acquir Immune Defic Syndr. 1994 Aug;7(8):799-806. Unique Identifier :
AIDSLINE MED/94293161
AB We investigated the ability of human recombinant interleukin-7 (IL-7) to
enhance the immune responses of mice vaccinated with either the
alum-associated or liposome-formulated recombinant human
immunodeficiency virus (HIV)-envelope protein, env-2-3SF2 (a
nonglycosylated denatured gp 120 of HIV-1SF2 produced in genetically
engineered yeast). Pathogen-free (C3H) mice were vaccinated on days 0,
14, and 28 with 10 micrograms of either the alum-associated env-2-3SF2
or liposome-formulated env-2-3SF2, both containing a lipophylic muramyl
tripeptide, MTP-PE. Liposome-formulated IL-7 (5 micrograms/mouse) or
empty liposomes were given on days 7, 14, 21, and 28. Antibody response
against the immunized antigen, evaluated on day 21 and day 35 or 42,
showed that liposome-formulated antigen induced higher antibody titer
than did alum-associated antigen, and these antibody responses can be
enhanced by concurrent administration of IL-7 liposomes. Spleen cells
were harvested on day 21 and day 35 or 42 to evaluate cytotoxic T
lymphocyte responses directed against autologous cells infected with
vaccinia virus-expressing HIV-envelope protein. Mice treated with
liposome-formulated antigen expressed the highest cytotoxic t-lymphocyte
(CTL) activity, regardless of whether IL-7 liposome was given as an
immune potentiator. In contrast, spleen cells from mice vaccinated with
alum-associated antigen exhibited minimal CTL response, which was
enhanced by concurrent IL-7 liposome treatment. Collectively, IL-7
liposome treatment enhanced the antibody production of the
alum-associated or liposome-formulated env-2-3SF2, whereas its
enhancement of CTL activity was detected only in mice vaccinated with
alum-associated antigen.
DE Acetylmuramyl-Alanyl-Isoglutamine/*ANALOGS & DERIVATIVES/
ADMINISTRATION & DOSAGE/IMMUNOLOGY *Adjuvants,
Immunologic/ADMINISTRATION & DOSAGE Animal AIDS
Vaccines/ADMINISTRATION & DOSAGE/*IMMUNOLOGY Cytotoxicity, Immunologic
Drug Carriers Gene Products, env/*IMMUNOLOGY HIV
Antibodies/BIOSYNTHESIS HIV-1/*IMMUNOLOGY Interleukin-7/ADMINISTRATION
& DOSAGE/*IMMUNOLOGY Liposomes Mice Mice, Inbred C3H
Phosphatidylethanolamines/ADMINISTRATION & DOSAGE/*IMMUNOLOGY
Recombinant Proteins/ADMINISTRATION & DOSAGE/IMMUNOLOGY Specific
Pathogen-Free Organisms Support, U.S. Gov't, P.H.S. T-Lymphocytes,
Cytotoxic/IMMUNOLOGY Vaccines, Synthetic/ADMINISTRATION &
DOSAGE/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).