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1996-02-26
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Document 0533
DOCN M9620533
TI Induction of cell-mediated immune responses to human immunodeficiency
virus type 1 Gag protein by using Listeria monocytogenes as a live
vaccine vector.
DT 9602
AU Frankel FR; Hegde S; Lieberman J; Paterson Y; Department of
Microbiology, University of Pennsylvania, School of; Medicine,
Philadelphia 19104, USA.
SO J Immunol. 1995 Nov 15;155(10):4775-82. Unique Identifier : AIDSLINE
MED/96062295
AB Cytolytic T cells, acting through cytokines or by direct lysis of
infected target cells, have been shown to play a significant role in the
control of viral infections and may be responsible for the prolonged
asymptomatic phase following infection by HIV. Accordingly, methods that
can generate strong cell-mediated immune responses may be useful in the
development of prophylactic and therapeutic vaccines against HIV.
Listeria monocytogenes is a Gram-positive intracellular microorganism
that elicits strong cell-mediated immune responses against its own
secreted proteins following infection. In this study we have modified
the chromosome of L. monocytogenes so that it stably expresses and
secretes the p55 HIV gag gene product and examined the cell-mediated
immune response of BALB/c mice to infection with this recombinant
organism. Infected animals were found to mount a specific, strong,
long-lasting CD8+ cytolytic T cell response against a predominant
epitope contained within the p24 fragment of the HIV Gag protein. This
epitope previously has been shown to be recognized by CTLs obtained from
some HIV-infected humans. Our results suggest that chromosomally
modified strains of L. monocytogenes may provide valuable vaccine
vectors for use against HIV.
DE Amino Acid Sequence Animal *AIDS Vaccines Base Sequence
Cytotoxicity, Immunologic Gene Products, gag/*GENETICS/*IMMUNOLOGY
Gene Transfer Human *HIV-1 *Immunity, Cellular Listeria
monocytogenes/*GENETICS/IMMUNOLOGY Mice Mice, Inbred BALB C Molecular
Sequence Data Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S.
T-Lymphocytes/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).