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| Content Provider | PubMed Central |
|---|---|
| Author | Derby, Nina R. Kraft, Zane Kan, Elaine Crooks, Emma T. Barnett, Susan W. Srivastava, Indresh K. Binley, James M. Leonidas, Stamatatos |
| Copyright Year | 2006 |
| Abstract | The antibody responses elicited in rhesus macaques immunized with soluble human immunodeficiency virus (HIV) Env gp140 proteins derived from the R5-tropic HIV-1 SF162 virus were analyzed and compared to the broadly reactive neutralizing antibody responses elicited during chronic infection of a macaque with a simian/human immunodeficiency virus (SHIV) expressing the HIV-1 SF162 Env, SHIVSF162P4, and humans infected with heterologous HIV-1 isolates. Four gp140 immunogens were evaluated: SF162gp140, ΔV2gp140 (lacking the crown of the V2 loop), ΔV3gp140 (lacking the crown of the V3 loop), and ΔV2ΔV3gp140 (lacking both the V2 and V3 loop crowns). SF162gp140 and ΔV2gp140 have been previously evaluated by our group in a pilot study, but here, a more comprehensive analysis of their immunogenic properties was performed. All four gp140 immunogens elicited stronger anti-gp120 than anti-gp41 antibodies and potent homologous neutralizing antibodies (NAbs) that primarily targeted the first hypervariable region (V1 loop) of gp120, although SF162gp140 also elicited anti-V3 NAbs. Heterologous NAbs were elicited by SF162gp140 and ΔV2gp140 but were weak in potency and narrow in specificity. No heterologous NAbs were elicited by ΔV3gp140 or ΔV2ΔV3gp140. In contrast, the SHIVSF162P4-infected macaque and HIV-infected humans generated similar titers of anti-gp120 and anti-gp41 antibodies and NAbs of significant breadth against primary HIV-1 isolates, which did not target the V1 loop. The difference in V1 loop immunogenicity between soluble gp140 and virion-associated gp160 Env proteins derived from SF162 may be the basis for the observed difference in the breadth of neutralization in sera from the immunized and infected animals studied here. |
| Related Links | http://dx.doi.org/10.1128/JVI.00956-06 |
| Starting Page | 8745 |
| File Format | |
| ISSN | 10985514 |
| e-ISSN | 10985514 |
| Journal | Journal of Virology |
| Issue Number | 17 |
| Volume Number | 80 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2006-09-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Virology Immunology Microbiology Insect Science |
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