home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Collection of Education
/
collectionofeducationcarat1997.iso
/
HEALTH
/
MED9602.ZIP
/
M9620384.TXT
< prev
next >
Wrap
Text File
|
1996-02-26
|
3KB
|
49 lines
Document 0384
DOCN M9620384
TI Protective efficacy of nonneutralizing monoclonal antibodies in acute
infection with murine leukemia virus.
DT 9602
AU Pincus SH; Cole R; Ireland R; McAtee F; Fujisawa R; Portis J; Laboratory
of Microbial Structure and Function, Rocky Mountain; Laboratories,
National Institute of Allergy and Infectious; Diseases, Hamilton,
Montana 59840, USA.
SO J Virol. 1995 Nov;69(11):7152-8. Unique Identifier : AIDSLINE
MED/96013819
AB We have used an experimental retrovirus infection to study the roles
played by different antibodies in resistance to both infection and
disease. A molecularly cloned chimeric murine leukemia virus was used to
induce acute lethal neurological disease in neonatal mice. A panel of
monoclonal antibodies directed against the Gag and Env proteins was
tested for protective efficacy. In vitro neutralization assays
demonstrated that anti-Env antibodies gave different degrees of
neutralization, while no anti-Gag neutralized the virus. In vivo
experimental endpoints were onset of clinical signs and premoribund
condition. As expected, different anti-Env antibodies demonstrated
different degrees of protection which correlated with their neutralizing
abilities. Surprisingly, anti-Gag antibodies directed against both p15
(MA protein) and p30 (CA protein) were also protective, significantly
delaying the onset of disease. No protection was seen with either of two
control antibodies. The protection with anti-Gag was dose related and
time dependent and was also produced with Fab fragments. Treatment with
anti-Gag did not prevent viremia but resulted in a slight slowing in
viremia kinetics and decreased levels of virus in the central nervous
systems of mice protected from disease. These data indicate that
nonneutralizing antiretroviral antibodies can influence the outcome of
retroviral disease. The data also suggest a functional role for cell
surface expression of Gag proteins on murine leukemia virus-infected
cells.
DE Animal Animals, Newborn Antibodies, Monoclonal/*THERAPEUTIC USE
Antibodies, Viral/THERAPEUTIC USE Comparative Study Fluorescent
Antibody Technique, Indirect Gene Products, env/IMMUNOLOGY Gene
Products, gag/IMMUNOLOGY Immunoglobulins, Fab/THERAPEUTIC USE
*Leukemia Viruses, Murine Mice Mice, Inbred Strains Nervous System
Diseases/*IMMUNOLOGY/PREVENTION & CONTROL/ *VIROLOGY Neutralization
Tests Rats Retroviridae Infections/*IMMUNOLOGY/PREVENTION & CONTROL
Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S.
T-Lymphocytes/IMMUNOLOGY Time Factors Tumor Virus
Infections/*IMMUNOLOGY/PREVENTION & CONTROL JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).