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M9480850.TXT
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1994-09-05
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Document 0850
DOCN M9480850
TI Feline bone marrow stromal fibroblasts are a target of feline
immunodeficiency virus infection in vitro and in vivo.
DT 9410
AU Lu YS; Ho SI; Read RW; Richardson JA; Pakes SP; University of Texas
Southwestern Medical Center, Dallas.
SO Abstr Gen Meet Am Soc Microbiol. 1994;94:485 (abstract no. T-18). Unique
Identifier : AIDSLINE ASM94/94313095
AB Similar to HIV infection in humans, cats infected with feline
immunodeficiency virus (FIV) develop anemia, neutropenia and
lymphopenia. These hematologic abnormalities are thought to be due to
altered marrow micro-environments because of infected marrow stromal
cells. Susceptibility of marrow stromal cells to FIV infection is
unknown. Stromal fibroblasts from bone marrow cells isolated from three
SPF cats were grown in culture medium and were exposed to FIV (Petaluma
strain). Portions of the FIV-exposed stromal fibroblasts were cocultured
with CRFK cells to amplify FIV infection. Culture supernatants and cells
from amplified and nonamplified cultures were assayed for viral
infection. Results show that cells from both cultures are positive for
proviral DNA by PCR and viral antigens by IFA. However, p26 viral
antigen (ELISA assay) is found only in supernatant of stromal
fibroblasts cocultured with CRFK cells. Similarly, marrow stromal
fibroblasts from three FIV-infected cats were prepared and treated in
the same manner without exposure to FIV in vitro. Some of the stromal
fibroblasts were cocultured with CRFK cells or Con A-activated
peripheral blood lymphoblasts from an SPF cat. The results show that
proviral DNA and viral antigens are positive in stromal fibroblasts and
cocultured cells. However, p26 viral antigen is detected only in
supernatant of stromal fibroblasts of individual cat cocultured with
CRFK or activated lymphoblasts, but not both. Both in vitro and in vivo
results indicate that feline marrow stromal fibroblasts are a target of
FIV infection. FIV-infected cats may serve a good model to study
hematopoietic dysfunction of HIV infection in humans.
DE Animal Antigens, Viral/ANALYSIS Bone Marrow/*CYTOLOGY/MICROBIOLOGY
Cats Cells, Cultured Comparative Study DNA, Viral/ANALYSIS
Enzyme-Linked Immunosorbent Assay Feline Acquired Immunodeficiency
Syndrome/*PHYSIOPATHOLOGY Fibroblasts/CYTOLOGY/MICROBIOLOGY
Hematopoiesis Human HIV Infections/PHYSIOPATHOLOGY Immunodeficiency
Virus, Feline/*GROWTH & DEVELOPMENT/GENETICS/ ISOLATION & PURIF
Polymerase Chain Reaction Proviruses/GROWTH &
DEVELOPMENT/GENETICS/ISOLATION & PURIF MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).