home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9410p.zip
/
M94A3171.TXT
< prev
next >
Wrap
Text File
|
1994-10-25
|
3KB
|
45 lines
Document 3171
DOCN M94A3171
TI Inverse correlation between viremia and natural killer cells in a
naturally SIVcpz-ant infected chimpanzee.
DT 9412
AU Kestens L; Vingerhoets J; Peeters M; Vanham G; van der Groen G; Gigase
P; Heeney J; Inst. of Trop. Med., Antwerpen, Belgium.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):137 (abstract no. PA0169). Unique
Identifier : AIDSLINE ICA10/94369404
AB OBJECTIVE: 1) To analyze parameters of cellular immunity in a
wild-caught chimpanzee, naturally infected with an HIV-1 related
lentivirus (SIVcpz-ant). 2) To compare results of 36 months of follow-up
with 3 experimentally HIV-1 infected and 5 uninfected control
chimpanzees. METHODS: Quantitative virus cultures from peripheral blood
mononuclear cells (PBMC) and plasma, and parameters of cellular immunity
were assessed quarterly. Natural killer (NK) cells (CD3-CD8+) and CD4
cells were enumerated in peripheral blood by flow cytometry. NK function
was assessed in a Cr-51 release assay. In vitro suppression of virus
replication by PBMC was assessed after removal of CD8+ cells and CD3+
cells respectively. RESULTS: In the SIVcpz-ant-infected chimpanzee, no
clinical immunodeficiency was observed during 36 months follow-up
period. Virus could always successfully be cultured from PBMC with
relative stable virus titers. In plasma, titers of infectious virus
fluctuated and ranged from < 1 to 500 TCID/ml plasma. During follow up,
the absolute CD4 count remained always within the range of uninfected
chimpanzees. The absolute number of NK cells varied significantly during
follow-up (200 to 3000 cells/microliter) and tended to correlate
inversely with the virus titer in blood or plasma. CD8+ T cells, but not
CD8+ NK cells, were found to exert a significant suppressive activity on
virus replication in vitro. CONCLUSION: Our data indicate that CD8+
lymphocytes, and CD8+ T cells in particular have a role in controlling
the persistent viremia. In addition, the results are suggestive for an
interaction between SIVcpz-ant and NK cells in the naturally infected
chimpanzee.
DE Animal Animals, Wild Antigens, CD3/ANALYSIS Antigens, CD8/ANALYSIS
Chimpansee troglodytes Flow Cytometry Follow-Up Studies Immunity,
Cellular Killer Cells, Natural/*IMMUNOLOGY Simian Acquired
Immunodeficiency Syndrome/*IMMUNOLOGY *SIV T-Lymphocyte
Subsets/*IMMUNOLOGY T4 Lymphocytes/IMMUNOLOGY Viremia/*IMMUNOLOGY
MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).