home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Collection of Education
/
collectionofeducationcarat1997.iso
/
HEALTH
/
MED9601.ZIP
/
M9610105.TXT
< prev
next >
Wrap
Text File
|
1996-01-30
|
3KB
|
45 lines
Document 0105
DOCN M9610105
TI Cellular immune response of rhesus monkeys infected with a partially
attenuated nef deletion mutant of the simian immunodeficiency virus.
DT 9601
AU Dittmer U; Nisslein T; Bodemer W; Petry H; Sauermann U; Stahl-Hennig C;
Hunsmann G; Department for Virology and Immunology, German Primate
Center,; Gottingen.
SO Virology. 1995 Oct 1;212(2):392-7. Unique Identifier : AIDSLINE
MED/96010211
AB To date the vaccines most successful in the simian immunodeficiency
virus (SIV) model of AIDS are live attenuated viruses. However, the
virus-specific immune response induced after infection of monkeys with
attenuated SIV has not been described comprehensively. Therefore, we
investigated the cellular immune response of eight rhesus macaques
infected with a nef deletion mutant of SIVmac32H (pC8). In contrast to
monkeys infected with pathogenic SIV, pC8-infected macaques developed a
virus-specific T-cell proliferation. In addition, all animals showed a
proliferative T-cell response to recall antigen and mitogens. In six of
eight monkeys virus-specific cytotoxic T-cells directed against
different SIV polypeptides were detected. In two animals, however, the
truncated nef gene reverted to full length 12 weeks after pC8 infection.
These two monkeys developed hematological alterations, indicating an
immunodeficiency. Simultaneously with the onset of disease the animals
lost their T-cell responsiveness against recall antigens. Eight weeks
later their T-cell reactivity against mitogens was also abrogated. The
results indicate that live attenuated SIV induced a virus-specific
cellular immune response in monkeys which might be associated with the
previously reported resistance to superinfection with pathogenic SIV.
Paradoxically, if the attenuated SIV reverts in vivo to a more virulent
virus, the SIV-specific immune response was inefficient to prevent the
onset of immunodeficiency in the animals.
DE Animal Base Sequence CD4-CD8 Ratio CD4-Positive
T-Lymphocytes/IMMUNOLOGY Fusion Proteins, gag-pol/IMMUNOLOGY Gene
Products, env/IMMUNOLOGY *Genes, nef Hemocyanin/IMMUNOLOGY Immunity,
Cellular Lymphocyte Transformation Macaca mulatta Molecular Sequence
Data *Sequence Deletion Simian Acquired Immunodeficiency
Syndrome/*IMMUNOLOGY Support, Non-U.S. Gov't
SIV/GENETICS/*IMMUNOLOGY/PATHOGENICITY T-Lymphocytes,
Cytotoxic/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).