Abstract
DNA sequences and three distinct in vitro functions of Nef were evaluated in a group of seven perinatally infected children. nef gene sequences obtained before and after virus culture showed that one of the five non-/slow progressors harbored a virus with large deletions. nef genes from the remaining four children were full length but contained discrete changes at a higher frequency than the rapid progressors. In functional studies, 40 of 44 Nef proteins derived from the whole study group were capable of binding the cellular serine kinase p62, indicating that this function is well conserved among naturally occurring viruses. In contrast, representative Nef proteins derived from the long-term non-/slow progressors were found to be defective or far less capable of enhancing viral replication and/or viral infectivity in herpesvirus saimiri-transformed human T cells and peripheral blood mononuclear cells. On reversion of highly prevalent point mutations in the defective proteins, viral replication could be restored to wild-type levels. Our results suggest that nef genes derived from pediatric long-term nonprogressors have gross deletions in isolated cases but a higher prevalence of discrete changes that may impair Nef function in primary T cell assays, but not all functions reported for Nef.
| Original language | English |
|---|---|
| Pages (from-to) | 1855-1868 |
| Number of pages | 14 |
| Journal | AIDS Research and Human Retroviruses |
| Volume | 16 |
| Issue number | 17 |
| DOIs | |
| State | Published - Nov 20 2000 |
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ASJC Scopus subject areas
- Immunology
- Virology
Cite this
Functional and structural defects in HIV type 1 nef genes derived from pediatric long-term survivors. / Geffin, R.; Wolf, D.; Müller, R.; Hill, M. D.; Stellwag, E.; Freitag, M.; Sass, G.; Scott, Gwendolyn B; Baur, A. S.
In: AIDS Research and Human Retroviruses, Vol. 16, No. 17, 20.11.2000, p. 1855-1868.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Functional and structural defects in HIV type 1 nef genes derived from pediatric long-term survivors
AU - Geffin, R.
AU - Wolf, D.
AU - Müller, R.
AU - Hill, M. D.
AU - Stellwag, E.
AU - Freitag, M.
AU - Sass, G.
AU - Scott, Gwendolyn B
AU - Baur, A. S.
PY - 2000/11/20
Y1 - 2000/11/20
N2 - DNA sequences and three distinct in vitro functions of Nef were evaluated in a group of seven perinatally infected children. nef gene sequences obtained before and after virus culture showed that one of the five non-/slow progressors harbored a virus with large deletions. nef genes from the remaining four children were full length but contained discrete changes at a higher frequency than the rapid progressors. In functional studies, 40 of 44 Nef proteins derived from the whole study group were capable of binding the cellular serine kinase p62, indicating that this function is well conserved among naturally occurring viruses. In contrast, representative Nef proteins derived from the long-term non-/slow progressors were found to be defective or far less capable of enhancing viral replication and/or viral infectivity in herpesvirus saimiri-transformed human T cells and peripheral blood mononuclear cells. On reversion of highly prevalent point mutations in the defective proteins, viral replication could be restored to wild-type levels. Our results suggest that nef genes derived from pediatric long-term nonprogressors have gross deletions in isolated cases but a higher prevalence of discrete changes that may impair Nef function in primary T cell assays, but not all functions reported for Nef.
AB - DNA sequences and three distinct in vitro functions of Nef were evaluated in a group of seven perinatally infected children. nef gene sequences obtained before and after virus culture showed that one of the five non-/slow progressors harbored a virus with large deletions. nef genes from the remaining four children were full length but contained discrete changes at a higher frequency than the rapid progressors. In functional studies, 40 of 44 Nef proteins derived from the whole study group were capable of binding the cellular serine kinase p62, indicating that this function is well conserved among naturally occurring viruses. In contrast, representative Nef proteins derived from the long-term non-/slow progressors were found to be defective or far less capable of enhancing viral replication and/or viral infectivity in herpesvirus saimiri-transformed human T cells and peripheral blood mononuclear cells. On reversion of highly prevalent point mutations in the defective proteins, viral replication could be restored to wild-type levels. Our results suggest that nef genes derived from pediatric long-term nonprogressors have gross deletions in isolated cases but a higher prevalence of discrete changes that may impair Nef function in primary T cell assays, but not all functions reported for Nef.
UR - http://www.scopus.com/inward/record.url?scp=0034693935&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034693935&partnerID=8YFLogxK
U2 - 10.1089/08892220050195810
DO - 10.1089/08892220050195810
M3 - Article
C2 - 11118071
AN - SCOPUS:0034693935
VL - 16
SP - 1855
EP - 1868
JO - AIDS Research and Human Retroviruses
JF - AIDS Research and Human Retroviruses
SN - 0889-2229
IS - 17
ER -