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Document 0543
DOCN M9650543
TI Involvement of gag- and env-specific cytotoxic T lymphocytes in
protective immunity to feline immunodeficiency virus.
DT 9605
AU Flynn JN; Beatty JA; Cannon CA; Stephens EB; Hosie MJ; Neil JC; Jarrett
O; Department of Veterinary Pathology, University of Glasgow,; Bearsden,
Scotland.
SO AIDS Res Hum Retroviruses. 1995 Sep;11(9):1107-13. Unique Identifier :
AIDSLINE MED/96089218
AB Definition of the immunological mechanisms involved in protective
immunity against lentiviral infections is crucial to the development of
an effective vaccine. The induction of gag- and env-specific
cell-mediated immune responses was studied in cats following vaccination
with whole inactivated feline immunodeficiency virus (FIV). Cats were
immunized by inoculation with three doses of
paraformaldehyde-inactivated FIV, derived from the feline lymphoid cell
line, FL-4, which is persistently infected with the Petaluma isolate of
FIV. Autologous or allogeneic skin fibroblasts either infected with
recombinant FIV gag- or env-vaccinia virus or pulsed with FIV env
peptides were used as targets in chromium-51 release assays. Effector
cells were fresh peripheral blood mononuclear cells. Following the third
immunization, all vaccinated cats, but none of the control cats
immunized with adjuvant alone, had detectable FIV env-specific
lymphocytotoxicity in their peripheral blood. Two cats also exhibited
gag-specific activity. There was no recognition of either allogeneic
skin fibroblasts infected with recombinant vaccinia virus or autologous
target cells infected with wild-type vaccinia virus, indicating the
specificity and MHC-restricted nature of the response. Vaccinated cats,
but not control cats, were protected from challenge with the homologous
Petaluma isolate of FIV. Partial epitope mapping of the env-specific
cytotoxic response was performed using overlapping 10-amino acid
peptides from the env V3 domain of FIV. This response appeared to be
directed at env peptide 1 (RAISSWKQRN) and env peptide 3 (QRNRWEWRPD),
which lie adjacent to a beta-turn within the V3 domain.(ABSTRACT
TRUNCATED AT 250 WORDS)
DE Amino Acid Sequence Animal Antibodies, Viral/BLOOD Cats Epitope
Mapping Feline Acquired Immunodeficiency Syndrome/IMMUNOLOGY/PREVENTION
& CONTROL Gene Products, env/GENETICS/*IMMUNOLOGY Gene Products,
gag/BLOOD/GENETICS/*IMMUNOLOGY Immunodeficiency Virus,
Feline/GENETICS/*IMMUNOLOGY Molecular Sequence Data Peptide
Fragments/GENETICS/IMMUNOLOGY Support, Non-U.S. Gov't T-Lymphocytes,
Cytotoxic/*IMMUNOLOGY Vaccination Vaccines, Inactivated/PHARMACOLOGY
Viral Vaccines/PHARMACOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).