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M94A0142.TXT
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1994-10-01
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Document 0142
DOCN M94A0142
TI Stromal cell lines derived from LP-BM5 murine leukemia virus-infected
long-term bone marrow cultures impair hematopoiesis in vitro.
DT 9412
AU Tse KF; Morrow JK; Hughes NK; Gallicchio VS; Department of Internal
Medicine, University of Kentucky Medical; Center, Lexington.
SO Blood. 1994 Sep 1;84(5):1508-18. Unique Identifier : AIDSLINE
MED/94348074
AB Murine acquired immunodeficiency syndrome (MAIDS) induced by defective
LP-BM5 murine leukemia virus is a disease with many similarities to
human AIDS. Previous studies indicated that the depressed hematopoiesis
observed in LP-BM5-infected marrow cultures may be attributable to a
defect of hematopoietic stroma. We report here the generation of
permanent stromal cell lines from noninfected and LP-BM5-infected marrow
cultures. Retrovirus infection was confirmed by polymerase chain
reaction for viral genome. The ability of these cell lines to support in
vitro hematopoiesis was studied. Results indicated that, when cocultured
with normal or infected nonadherent mononuclear cells, noninfected cell
lines efficiently supported the production of hematopoietic precursors,
whereas viral-infected cell lines induced suppression of both normal and
viral-infected progenitors. Expression of cytokine genes in stromal cell
lines was also examined. All cell lines expressed equivalent levels of
transcripts for stem cell factor and tumor necrosis factor alpha.
However, infection was associated with higher levels of interleukin-4
and transforming growth factor beta 1 transcript expression. These
findings suggest that infected stromal cell lines exhibit a defective
hematopoietic microenvironment that produced altered cytokine expression
resulting in faulty hematopoiesis. Further characterization of the
defective cell lines should prove valuable for studies of the
pathogenesis of murine AIDS.
DE Animal Base Sequence Bone Marrow/*PATHOLOGY Cell Line Cell
Separation Cells, Cultured Colony-Forming Units Assay
Cytokines/*BIOSYNTHESIS Defective Viruses/GENETICS/ISOLATION &
PURIF/ULTRASTRUCTURE DNA Primers *Gene Expression Genes, gag
*Hematopoiesis Hematopoietic Cell Growth Factors/BIOSYNTHESIS
Hematopoietic Stem Cells/CYTOLOGY/*PATHOLOGY/PHYSIOLOGY
Interleukin-3/BIOSYNTHESIS Interleukin-4/BIOSYNTHESIS Leukemia
Viruses, Murine/*GENETICS/ISOLATION & PURIF/ ULTRASTRUCTURE Mice
Mice, Inbred C57BL Molecular Sequence Data Murine Acquired
Immunodeficiency Syndrome/MICROBIOLOGY Nuclear
Membrane/MICROBIOLOGY/ULTRASTRUCTURE Polymerase Chain Reaction
Support, U.S. Gov't, Non-P.H.S. Transforming Growth Factor
beta/BIOSYNTHESIS Tumor Necrosis Factor/BIOSYNTHESIS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).