Previous Article | Next Article ![]()
J. Virol., Feb 1997, 1608-1620, Vol 71, No. 2
V Hirsch, D Adger-Johnson, B Campbell, S Goldstein, C Brown, WR Elkins and DC Montefiori
An infectious molecular clone of simian immunodeficiency virus SIVsm was
derived from a biological isolate obtained late in disease from an
immunodeficient rhesus macaque (E543) with SIV-induced encephalitis. The
molecularly cloned virus, SIVsmE543-3, replicated well in macaque
peripheral blood mononuclear cells and monocyte-derived macrophages and
resisted neutralization by heterologous sera which broadly neutralized
genetically diverse SIV variants in vitro. SIVsmE543-3 was infectious and
induced AIDS when inoculated intravenously into pig-tailed macaques (Macaca
nemestrina). Two of four infected macaques developed no measurable
SIV-specific antibody and succumbed to a wasting syndrome and SIV-induced
meningoencephalitis by 14 and 33 weeks postinfection. The other two
macaques developed antibodies reactive in Western blot and virus
neutralization assays. One macaque was sacrificed at 1 year
postinoculation, and the survivor has evidence of immunodeficiency,
characterized by persistently low CD4 lymphocyte subsets in the peripheral
blood. Plasma samples from these latter animals neutralized SIVsmE543-3 but
with much lower efficiency than neutralization of other related SIV
strains, confirming the difficulty by which this molecularly cloned virus
is neutralized in vitro. SIVsmE543-3 will provide a valuable reagent for
studying SIV-induced encephalitis, mapping determinants of neutralization,
and determining the in vivo significance of resistance to neutralization in
vitro.
Copyright © 1997, American Society for Microbiology
A molecularly cloned, pathogenic, neutralization-resistant simian immunodeficiency virus, SIVsmE543-3
Immunodeficiency Viruses Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, Rockville, Maryland 20852, USA. vhirsch@pop.niaid.nih.gov
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»