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Zhou M, Humbert M, Mukhtar MM, Scinto HB, Vyas HK, Lakhashe SK, Byrareddy SN, Maurer G, Thorat S, Owuor J, Lai Z, Chen Y, Griffiths A, Chenine AL, Gumber S, Villinger F, Montefiori D, Ruprecht RM. Adaptation of an R5 Simian-Human Immunodeficiency Virus Encoding an HIV Clade A Envelope with or without Ablation of Adaptive Host Immunity: Differential Selection of Viral Mutants. J Virol 2019; 93:e02267-18. [PMID: 30760566 PMCID: PMC6475780 DOI: 10.1128/jvi.02267-18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/05/2019] [Indexed: 11/20/2022] Open
Abstract
Simian-human immunodeficiency virus (SHIV) infection in rhesus macaques (RMs) resembles human immunodeficiency virus type 1 (HIV-1) infection in humans and serves as a tool to evaluate candidate AIDS vaccines. HIV-1 clade A (HIV-A) predominates in parts of Africa. We constructed an R5 clade A SHIV (SHIV-A; strain SHIV-KNH1144) carrying env from a Kenyan HIV-A. SHIV-A underwent rapid serial passage through six RMs. To allow unbridled replication without adaptive immunity, we simultaneously ablated CD8+ and B cells with cytotoxic monoclonal antibodies in the next RM, resulting in extremely high viremia and CD4+ T-cell loss. Infected blood was then transferred into two non-immune-depleted RMs, where progeny SHIV-A showed increased replicative capacity and caused AIDS. We reisolated SHIV-KNH1144p4, which was replication competent in peripheral blood mononuclear cells (PBMC) of all RMs tested. Next-generation sequencing of early- and late-passage SHIV-A strains identified mutations that arose due to "fitness" virus optimization in the former and mutations exhibiting signatures typical for adaptive host immunity in the latter. "Fitness" mutations are best described as mutations that allow for better fit of the HIV-A Env with SIV-derived virion building blocks or host proteins and mutations in noncoding regions that accelerate virus replication, all of which result in the outgrowth of virus variants in the absence of adaptive T-cell and antibody-mediated host immunity.IMPORTANCE In this study, we constructed a simian-human immunodeficiency virus carrying an R5 Kenyan HIV-1 clade A env (SHIV-A). To bypass host immunity, SHIV-A was rapidly passaged in naive macaques or animals depleted of both CD8+ and B cells. Next-generation sequencing identified different mutations that resulted from optimization of viral replicative fitness either in the absence of adaptive immunity or due to pressure from adaptive immune responses.
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Affiliation(s)
- Mingkui Zhou
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Michael Humbert
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Muhammad M Mukhtar
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Hanna B Scinto
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- Department of Microbiology, Immunology & Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Hemant K Vyas
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Samir K Lakhashe
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Siddappa N Byrareddy
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Gregor Maurer
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- VetCore, Facility for Research, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Swati Thorat
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
| | - Joshua Owuor
- Texas Biomedical Research Institute, San Antonio, Texas, USA
| | - Zhao Lai
- Greehey Children's Cancer Research Institute, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Yidong Chen
- Greehey Children's Cancer Research Institute, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- Department of Epidemiology and Biostatistics, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | | | - Agnès-Laurence Chenine
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
- Henry M. Jackson Foundation, Bethesda, Maryland, USA
- Military HIV Research Program, Silver Spring, Maryland, USA
| | - Sanjeev Gumber
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, USA
| | - François Villinger
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, USA
- Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, USA
| | - David Montefiori
- Department of Surgery, Duke University School of Medicine, Durham, North Carolina, USA
| | - Ruth M Ruprecht
- Texas Biomedical Research Institute, San Antonio, Texas, USA
- Southwest National Primate Research Center, San Antonio, Texas, USA
- Dana-Farber Cancer Institute, Boston, Massachusetts, USA
- Department of Medicine, Harvard Medical School, Boston, Massachusetts, USA
- Department of Microbiology, Immunology & Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
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Dong H, Ye X, Zhong L, Xu J, Qiu J, Wang J, Shao Y, Xing H. Role of FOXO3 Activated by HIV-1 Tat in HIV-Associated Neurocognitive Disorder Neuronal Apoptosis. Front Neurosci 2019; 13:44. [PMID: 30778283 PMCID: PMC6369160 DOI: 10.3389/fnins.2019.00044] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 01/17/2019] [Indexed: 11/23/2022] Open
Abstract
There are numerous types of pathological changes in human immunodeficiency virus (HIV)-associated neurocognitive disorder (HAND), including apoptosis of neurons. HIV-1 transactivator of transcription (Tat) protein, which is encoded by HIV-1, may promote apoptosis in HAND. Forkhead box O3 (FOXO3) is a multispecific transcription factor that has roles in many biological processes, including cellular apoptosis. The aim of this study was to determine whether FOXO3 is activated by HIV-1 Tat and to investigate its role in neuronal apoptosis in HAND. We employed tissue staining and related molecular biological experimental methods to confirm our hypothesis. The in vivo experimental results demonstrated that the expression of nuclear FOXO3 increased in the apoptotic neurons of the cerebral cortexes of rhesus macaques infected with simian human immunodeficiency virus (SHIV). The in vitro investigation showed that HIV-1 Tat activated FOXO3, causing it to move from the cytoplasm to the nucleus via the c-Jun N-terminal kinase (JNK) signaling pathway in SH-SY5Y cells. Moreover, FOXO3 down-regulated expression of the anti-apoptosis gene B-cell lymphoma 2 (Bcl-2) and up-regulated the expression of the pro-apoptosis gene Bcl-2-like 11 (Bim) after entering the nucleus, eventually causing cellular apoptosis. Finally, reduction of nuclear FOXO3 reversed cellular apoptosis. Our results suggest that HIV-1 Tat induces FOXO3 to translocate from the cytoplasm to the nucleus via the JNK signaling pathway, leading to neuronal apoptosis. Agents targeting FOXO3 may provide approaches for restoring neuronal function in HAND.
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Affiliation(s)
- Huaqian Dong
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
| | - Xiang Ye
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
| | - Li Zhong
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
| | - Jinhong Xu
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
| | - Jinhua Qiu
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
| | - Jun Wang
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
| | - Yiming Shao
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Huiqin Xing
- Cancer Research Center, Department of Basic Medical Sciences, Fujian Provincial Key Laboratory of Neurodegenerative, Disease and Aging Research, School of Medicine, Xiamen University, Xiamen, China
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Staheli JP, Dyen MR, Lewis P, Barcy S. Discovery and biological characterization of two novel pig-tailed macaque homologs of HHV-6 and HHV-7. Virology 2014; 471-473:126-40. [PMID: 25461538 PMCID: PMC4312206 DOI: 10.1016/j.virol.2014.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/13/2014] [Accepted: 10/02/2014] [Indexed: 11/28/2022]
Abstract
Human herpesvirus-6 (HHV-6) and -7 (HHV-7) are Roseoloviruses within the Betaherpesvirus family, which have a high prevalence and suspected involvement in a number of diseases. Using CODEHOP-based PCR, we identified homologs of both viruses in saliva of pig-tailed macaques, provisionally named MneHV-6 and MneHV-7. This finding supports the existence of two distinct Roseolovirus lineages before the divergence of humans and macaques. Using specific qPCR assays, high levels of MneHV-6 and MneHV-7 DNA were detected in macaque saliva, although the frequency was greater for MneHV-7. A blood screen of 283 macaques revealed 10% MneHV-6 DNA positivity and 25% MneHV-7 positivity, with higher prevalences of MneHV-6 in older females and of MneHV-7 in younger males. Levels of MneHV-6 were increased in animals coinfected with MneHV-7, and both viruses were frequently detected in salivary gland and stomach tissues. Our discovery provides a unique animal model to answer unresolved questions regarding Roseolovirus pathology.
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Affiliation(s)
- Jeannette P Staheli
- Center for Global Infectious Disease Research, Seattle Children׳s Research Institute, Seattle, Research Center, Seattle, WA, USA.
| | - Michael R Dyen
- Center for Global Infectious Disease Research, Seattle Children׳s Research Institute, Seattle, Research Center, Seattle, WA, USA.
| | - Patrick Lewis
- Center for Global Infectious Disease Research, Seattle Children׳s Research Institute, Seattle, Research Center, Seattle, WA, USA.
| | - Serge Barcy
- Center for Global Infectious Disease Research, Seattle Children׳s Research Institute, Seattle, Research Center, Seattle, WA, USA; Department of Pediatrics, University of Washington, Seattle, WA, USA.
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Byrareddy SN, Ayash-Rashkovsky M, Kramer VG, Lee SJ, Correll M, Novembre FJ, Villinger F, Johnson WE, von Gegerfelt A, Felber BK, Ruprecht RM. Live attenuated Rev-independent Nef¯SIV enhances acquisition of heterologous SIVsmE660 in acutely vaccinated rhesus macaques. PLoS One 2013; 8:e75556. [PMID: 24098702 PMCID: PMC3787041 DOI: 10.1371/journal.pone.0075556] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 08/14/2013] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Rhesus macaques (RMs) inoculated with live-attenuated Rev-Independent Nef¯ simian immunodeficiency virus (Rev-Ind Nef¯SIV) as adults or neonates controlled viremia to undetectable levels and showed no signs of immunodeficiency over 6-8 years of follow-up. We tested the capacity of this live-attenuated virus to protect RMs against pathogenic, heterologous SIVsmE660 challenges. METHODOLOGY/PRINCIPAL FINDINGS Three groups of four RM were inoculated with Rev-Ind Nef¯SIV and compared. Group 1 was inoculated 8 years prior and again 15 months before low dose intrarectal challenges with SIVsmE660. Group 2 animals were inoculated with Rev-Ind Nef¯SIV at 15 months and Group 3 at 2 weeks prior to the SIVsmE660 challenges, respectively. Group 4 served as unvaccinated controls. All RMs underwent repeated weekly low-dose intrarectal challenges with SIVsmE660. Surprisingly, all RMs with acute live-attenuated virus infection (Group 3) became superinfected with the challenge virus, in contrast to the two other vaccine groups (Groups 1 and 2) (P=0.006 for each) and controls (Group 4) (P=0.022). Gene expression analysis showed significant upregulation of innate immune response-related chemokines and their receptors, most notably CCR5 in Group 3 animals during acute infection with Rev-Ind Nef¯SIV. CONCLUSIONS/SIGNIFICANCE We conclude that although Rev-Ind Nef¯SIV remained apathogenic, acute replication of the vaccine strain was not protective but associated with increased acquisition of heterologous mucosal SIVsmE660 challenges.
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Affiliation(s)
- Siddappa N. Byrareddy
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Mila Ayash-Rashkovsky
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Victor G. Kramer
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Sandra J. Lee
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Mick Correll
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Center for Cancer Computational Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Francis J. Novembre
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, United States of America
| | - Francois Villinger
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
- Department of Pathology and Laboratory Medicine, Emory Vaccine Center, Emory University, Atlanta, Georgia, United States of America
| | - Welkin E. Johnson
- Biology Department, Boston College, Boston, Massachusetts, United States of America
| | - Agneta von Gegerfelt
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, Frederick, Maryland, United States of America
| | - Barbara K. Felber
- Human Retrovirus Pathogenesis Section, Vaccine Branch, Center for Cancer Research, Frederick, Maryland, United States of America
| | - Ruth M. Ruprecht
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
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Bachler BC, Humbert M, Lakhashe SK, Rasmussen RA, Ruprecht RM. Live-virus exposure of vaccine-protected macaques alters the anti-HIV-1 antibody repertoire in the absence of viremia. Retrovirology 2013; 10:63. [PMID: 23800339 PMCID: PMC3695773 DOI: 10.1186/1742-4690-10-63] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Accepted: 06/03/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND We addressed the question whether live-virus challenges could alter vaccine-induced antibody (Ab) responses in vaccinated rhesus macaques (RMs) that completely resisted repeated exposures to R5-tropic simian-human immunodeficiency viruses encoding heterologous HIV clade C envelopes (SHIV-Cs). RESULTS We examined the Ab responses in aviremic RMs that had been immunized with a multi-component protein vaccine (multimeric HIV-1 gp160, HIV-1 Tat and SIV Gag-Pol particles) and compared anti-Env plasma Ab titers before and after repeated live-virus exposures. Although no viremia was ever detected in these animals, they showed significant increases in anti-gp140 Ab titers after they had encountered live SHIVs. When we investigated the dynamics of anti-Env Ab titers during the immunization and challenge phases further, we detected the expected, vaccine-induced increases of Ab responses about two weeks after the last protein immunization. Remarkably, these titers kept rising during the repeated virus challenges, although no viremia resulted. In contrast, in vaccinated RMs that were not exposed to virus, anti-gp140 Ab titers declined after the peak seen two weeks after the last immunization. These data suggest boosting of pre-existing, vaccine-induced Ab responses as a consequence of repeated live-virus exposures. Next, we screened polyclonal plasma samples from two of the completely protected vaccinees by peptide phage display and designed a strategy that selects for recombinant phages recognized only by Abs present after - but not before - any SHIV challenge. With this "subtractive biopanning" approach, we isolated V3 mimotopes that were only recognized after the animals had been exposed to live virus. By detailed epitope mapping of such anti-V3 Ab responses, we showed that the challenges not only boosted pre-existing binding and neutralizing Ab titers, but also induced Abs targeting neo-antigens presented by the heterologous challenge virus. CONCLUSIONS Anti-Env Ab responses induced by recombinant protein vaccination were altered by the multiple, live SHIV challenges in vaccinees that had no detectable viral loads. These data may have implications for the interpretation of "vaccine only" responses in clinical vaccine trials.
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Affiliation(s)
- Barbara C Bachler
- Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute, Boston, MA 02215, USA
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Developing a neonatal HIV vaccine: insights from macaque models of pediatric HIV/AIDS. Curr Opin HIV AIDS 2012; 2:367-74. [PMID: 19372914 DOI: 10.1097/coh.0b013e3282cecf21] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PURPOSE OF REVIEW This review analyzes recent findings from nonhuman primate models of HIV/AIDS that are most relevant to developing active neonatal vaccine strategies against HIV breast milk transmission. We focus on studies published from 2005 to early 2007 that have characterized simian immunodeficiency virus or simian/human immunodeficiency virus transmission and the efficacy of HIV vaccine strategies in neonatal macaques. RECENT FINDINGS Nonhuman primate models of natural HIV breast milk transmission recapitulate many features of infection in human infants; however, the variation in timing and overall low rate of infection in these models precludes their use in conducting vaccine studies. Oral inoculation of infant macaques with defined viral inocula results in reliable transmission and is an efficient model for evaluating neonatal HIV vaccine strategies. All HIV vaccine strategies tested in neonatal macaques are immunogenic, but only a subset of these vaccines confer significant protection against virus acquisition or simian AIDS after oral challenge. SUMMARY Candidate HIV vaccine strategies can elicit virus-specific humoral and cell-mediated immune responses in newborn primates; however, vaccine immunogenicity in infant macaques is not a reliable criterion for predicting a vaccine's efficacy against oral virus challenge exposure.
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Lakhashe SK, Silvestri G, Ruprecht RM. No acquisition: a new ambition for HIV vaccine development? Curr Opin Virol 2012; 1:246-53. [PMID: 22081778 DOI: 10.1016/j.coviro.2011.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Development of a safe and effective prophylactic HIV-1 vaccine presents unique challenges. The pessimism following the failure of two HIV-1 vaccine concepts in clinical trials, HIV-1 gp120 and an adenovirus-based approach to induce only cellular immune responses, has been replaced by cautious optimism engendered by the RV144 trial outcome, the isolation of several new broadly reactive neutralizing monoclonal antibodies, and recent primate model data indicating prevention of viral acquisition by active or passive immunization. Intense efforts are underway to optimize immunogen design, adjuvants, and the tools for preclinical evaluation of candidate vaccines in primates, where correlates of protection can be examined in detail - as proof-of-concept for clinical trials.
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Borsetti A, Maggiorella MT, Sernicola L, Bellino S, Ferrantelli F, Belli R, Fulgenzi D, Mee ET, Rose NJ, Cafaro A, Ensoli B, Titti F. Influence of MHC class I and II haplotypes on the experimental infection of Mauritian cynomolgus macaques with SHIVSF162P4cy. ACTA ACUST UNITED AC 2012; 80:36-45. [DOI: 10.1111/j.1399-0039.2012.01875.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Lakhashe SK, Wang W, Siddappa NB, Hemashettar G, Polacino P, Hu SL, Villinger F, Else JG, Novembre FJ, Yoon JK, Lee SJ, Montefiori DC, Ruprecht RM, Rasmussen RA. Vaccination against heterologous R5 clade C SHIV: prevention of infection and correlates of protection. PLoS One 2011; 6:e22010. [PMID: 21799765 PMCID: PMC3140488 DOI: 10.1371/journal.pone.0022010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Accepted: 06/10/2011] [Indexed: 11/30/2022] Open
Abstract
A safe, efficacious vaccine is required to stop the AIDS pandemic. Disappointing results from the STEP trial implied a need to include humoral anti-HIV-1 responses, a notion supported by RV144 trial data even though correlates of protection are unknown. We vaccinated rhesus macaques with recombinant simian immunodeficiency virus (SIV) Gag-Pol particles, HIV-1 Tat and trimeric clade C (HIV-C) gp160, which induced cross-neutralizing antibodies (nAbs) and robust cellular immune responses. After five low-dose mucosal challenges with a simian-human immunodeficiency virus (SHIV) that encoded a heterologous R5 HIV-C envelope (22.1% divergence from the gp160 immunogen), 94% of controls became viremic, whereas one third of vaccinees remained virus-free. Upon high-dose SHIV rechallenge, all controls became infected, whereas some vaccinees remained aviremic. Peak viremia was inversely correlated with both cellular immunity (p<0.001) and cross-nAb titers (p<0.001). These data simultaneously linked cellular as well as humoral immune responses with the degree of protection for the first time.
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Affiliation(s)
- Samir K. Lakhashe
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Wendy Wang
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Nagadenahalli B. Siddappa
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Girish Hemashettar
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Patricia Polacino
- University of Washington, Seattle, Washington, United States of America
| | - Shiu-Lok Hu
- University of Washington, Seattle, Washington, United States of America
| | - François Villinger
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, United States of America
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
| | - James G. Else
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia, United States of America
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
| | - Francis J. Novembre
- Department of Microbiology, Emory University School of Medicine, Atlanta, Georgia, United States of America
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
| | - John K. Yoon
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Sandra J. Lee
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | | | - Ruth M. Ruprecht
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Robert A. Rasmussen
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
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García A, Siddappa NB, Li Q, Haase AT, Paul K, Stroud F, Zhang X, Fountain JA, Villinger F, Novembre FJ, Else JG, Evan Secor W, Ruprecht RM. AIDS and optic neuritis in a rhesus monkey infected with the R5 clade C SHIV-1157ipd3N4. J Med Primatol 2011; 39:356-60. [PMID: 20412378 DOI: 10.1111/j.1600-0684.2010.00416.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A Chinese rhesus macaque infected with the pathogenic CCR5-tropic clade C simian-human immunodeficiency virus, SHIV-1157ipd3N4, had persistent viremia, depletion of CD4(+) T cells to <200 cells/μl, opportunistic infections, coagulopathy, and gradual development of bilateral blindness. MRI revealed marked thickening of both optic nerves. Histopathological evaluation showed diffuse cellular infiltration at necropsy and a focus of SHIV-infected cells. This is the first report of CNS pathology following chronic infection with an obligate R5 SHIV.
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Affiliation(s)
- Anapatricia García
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA.
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Cafaro A, Macchia I, Maggiorella MT, Titti F, Ensoli B. Innovative approaches to develop prophylactic and therapeutic vaccines against HIV/AIDS. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 655:189-242. [PMID: 20047043 DOI: 10.1007/978-1-4419-1132-2_14] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The acquired immunodeficiency syndrome (AIDS) emerged in the human population in the summer of 1981. According to the latest United Nations estimates, worldwide over 33 million people are infected with human immunodeficiency virus (HIV) and the prevalence rates continue to rise globally. To control the alarming spread of HIV, an urgent need exists for developing a safe and effective vaccine that prevents individuals from becoming infected or progressing to disease. To be effective, an HIV/AIDS vaccine should induce broad and long-lasting humoral and cellular immune responses, at both mucosal and systemic level. However, the nature of protective immune responses remains largely elusive and this represents one of the major roadblocks preventing the development of an effective vaccine. Here we summarize our present understanding of the factors responsible for resistance to infection or control of progression to disease in human and monkey that may be relevant to vaccine development and briefly review recent approaches which are currently being tested in clinical trials. Finally, the rationale and the current status of novel strategies based on nonstructural HIV-1 proteins, such as Tat, Nef and Rev, used alone or in combination with modified structural HIV-1 Env proteins are discussed.
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Affiliation(s)
- Aurelio Cafaro
- National AIDS Center, Istituto Superiore di Sanità, V.le Regina Elena 299, 00161, Rome, Italy
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12
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Rasmussen RA, Lakhashe SK, Ruprecht RM. Bimodal AIDS vaccine approach: induction of cellular as well as humoral immunity can protect from systemic infection. Vaccine 2010; 28 Suppl 2:B25-31. [PMID: 20510739 DOI: 10.1016/j.vaccine.2009.10.131] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Revised: 10/16/2009] [Accepted: 10/29/2009] [Indexed: 11/17/2022]
Abstract
HIV clade C (HIV-C) strains comprise approximately 56% of all HIV infections worldwide, and AIDS vaccines intended for global use must protect against this subtype. Our vaccine strategy has been to induce balanced antiviral immunity consisting of both neutralizing antibody and cell-mediated immune responses, an approach we tested in primates. As reported earlier, after isolating recently transmitted HIV-C strains from Zambian infants, we used env from one such virus, HIV1084i, to generate a multimeric gp160 immunogen. From another virus, isolated from a different child of the same mother-infant cohort, we cloned env to generate a recombinant simian-human immunodeficiency virus (SHIV), which was adapted to rhesus monkeys to yield SHIV-1157ip. Infant macaques were immunized with recombinant viral proteins, including multimeric HIV-C Env 1084i. To test whether cross-protection could be achieved, we mismatched HIV-C Env immunogens and challenge virus env. All vaccinated and control monkeys were exposed orally to low-dose SHIV-1157ip. Animals with no or only transient infection were rechallenged intrarectally with a high dose of R5 SHIV-1157ipd3N4, a "late", animal-evolved variant of SHIV-1157ip. Compared to controls, the vaccinees had significantly lower peak viral RNA loads, and one vaccinee remained completely virus-free, even in lymphoid tissues. Data from our novel heterologous mucosal challenge model and our protein-only immunogens imply that significant protection against heterologous viruses circulating in the local community may be achievable with a strategy that seeks to simultaneously induce cellular immunity as well as neutralizing antibody responses.
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Affiliation(s)
- Robert A Rasmussen
- Department of Cancer, Immunology and AIDS, Dana-Farber Cancer Institute, Boston, MA 02115, United States
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Siddappa NB, Watkins JD, Wassermann KJ, Song R, Wang W, Kramer VG, Lakhashe S, Santosuosso M, Poznansky MC, Novembre FJ, Villinger F, Else JG, Montefiori DC, Rasmussen RA, Ruprecht RM. R5 clade C SHIV strains with tier 1 or 2 neutralization sensitivity: tools to dissect env evolution and to develop AIDS vaccines in primate models. PLoS One 2010; 5:e11689. [PMID: 20657739 PMCID: PMC2908149 DOI: 10.1371/journal.pone.0011689] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Accepted: 06/18/2010] [Indexed: 11/21/2022] Open
Abstract
Background HIV-1 clade C (HIV-C) predominates worldwide, and anti-HIV-C vaccines are urgently needed. Neutralizing antibody (nAb) responses are considered important but have proved difficult to elicit. Although some current immunogens elicit antibodies that neutralize highly neutralization-sensitive (tier 1) HIV strains, most circulating HIVs exhibiting a less sensitive (tier 2) phenotype are not neutralized. Thus, both tier 1 and 2 viruses are needed for vaccine discovery in nonhuman primate models. Methodology/Principal Findings We constructed a tier 1 simian-human immunodeficiency virus, SHIV-1157ipEL, by inserting an “early,” recently transmitted HIV-C env into the SHIV-1157ipd3N4 backbone [1] encoding a “late” form of the same env, which had evolved in a SHIV-infected rhesus monkey (RM) with AIDS. SHIV-1157ipEL was rapidly passaged to yield SHIV-1157ipEL-p, which remained exclusively R5-tropic and had a tier 1 phenotype, in contrast to “late” SHIV-1157ipd3N4 (tier 2). After 5 weekly low-dose intrarectal exposures, SHIV-1157ipEL-p systemically infected 16 out of 17 RM with high peak viral RNA loads and depleted gut CD4+ T cells. SHIV-1157ipEL-p and SHIV-1157ipd3N4 env genes diverge mostly in V1/V2. Molecular modeling revealed a possible mechanism for the increased neutralization resistance of SHIV-1157ipd3N4 Env: V2 loops hindering access to the CD4 binding site, shown experimentally with nAb b12. Similar mutations have been linked to decreased neutralization sensitivity in HIV-C strains isolated from humans over time, indicating parallel HIV-C Env evolution in humans and RM. Conclusions/Significance SHIV-1157ipEL-p, the first tier 1 R5 clade C SHIV, and SHIV-1157ipd3N4, its tier 2 counterpart, represent biologically relevant tools for anti-HIV-C vaccine development in primates.
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Affiliation(s)
- Nagadenahalli B. Siddappa
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jennifer D. Watkins
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | | | - Ruijiang Song
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Wendy Wang
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Victor G. Kramer
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
| | - Samir Lakhashe
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Michael Santosuosso
- Harvard Medical School, Boston, Massachusetts, United States of America
- Partners AIDS Research Center and Infectious Diseases Medicine, Massachusetts General Hospital (East), Charlestown, Massachusetts, United States of America
| | - Mark C. Poznansky
- Harvard Medical School, Boston, Massachusetts, United States of America
- Partners AIDS Research Center and Infectious Diseases Medicine, Massachusetts General Hospital (East), Charlestown, Massachusetts, United States of America
| | - Francis J. Novembre
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
- Department of Microbiology and Immunology, Emory University, Atlanta, Georgia, United States of America
| | - François Villinger
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
- Division of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, United States of America
| | - James G. Else
- Yerkes National Primate Research Center, Emory University, Atlanta, Georgia, United States of America
- Division of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia, United States of America
| | - David C. Montefiori
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, United States of America
| | - Robert A. Rasmussen
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
| | - Ruth M. Ruprecht
- Dana-Farber Cancer Institute, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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Abstract
Developing an HIV-1 vaccine that can elicit antibodies to prevent infection has been a formidable challenge. Although no single immunogen has generated antibodies that can neutralize diverse isolates, progress has been made in understanding (a) the structure of the HIV-1 envelope glycoprotein, which is targeted by neutralizing antibodies, (b) how HIV-1 evades antibodies made by an infected host, and (c) how rare monoclonal antibodies can exhibit broadly neutralizing activity. Advances in structural and molecular biology coupled with new approaches to isolate neutralizing antibodies from HIV-1-infected individuals are enhancing our understanding of what humoral immune responses will be required for a vaccine. This review summarizes progress in understanding the host antibody response to HIV-1 and current strategies for applying this information to develop an effective vaccine.
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Affiliation(s)
- James A Hoxie
- Division of Hematology/Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
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A comparative study of HIV-1 clade C env evolution in a Zambian infant with an infected rhesus macaque during disease progression. AIDS 2009; 23:1817-28. [PMID: 19609201 DOI: 10.1097/qad.0b013e32832f3da6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To evaluate whether HIV-1 clade C (HIV-C) envelope variations that arise during disease progression in rhesus macaque model reflect changes that occur naturally in human infection. DESIGN An infant macaque was infected with SHIV-1157i, an R5 tropic clade C SHIV, that expresses a primary HIV-C envelope derived from an infected human infant and monitored over a 5-year period. Genetic variation of the V1-V5 envelope region, which is the main target for humoral immune responses, derived from the infected macaque and infant was examined. METHODS The V1-V5 envelope region was cloned and sequenced from longitudinal peripheral blood mononuclear cell samples collected from the infected macaque and infant. Phylogenetic analysis [phylogenetic tree, diversity, divergence, ratio of nonsynonymous (dN) and synonymous substitution (dS) and dN distribution] was performed. Plasma RNA viral load, CD4(+) T-cell count, changes in the length of V1-V5 region, putative N-linked glycosylation site number and distribution were also measured. RESULTS Phylogenetic analysis revealed that changes in the macaque closely reflected those of the infant during disease progression. Similar distribution patterns of dN and hot spots were observed between the macaque and infant. Analysis of putative N-linked glycosylation sites revealed several common variations between the virus populations in the two host species. These variations correlate with decline of CD4 T-cell count in the macaque and might be linked with disease progression. CONCLUSION SHIV-C infection of macaque is a relevant animal model for studying variation of primary HIV-C envelope during disease progression and could be used to analyze the selection pressures that are associated with those changes.
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Ho O, Larsen K, Polacino P, Li Y, Anderson D, Song R, Ruprecht RM, Hu SL. Pathogenic infection of Macaca nemestrina with a CCR5-tropic subtype-C simian-human immunodeficiency virus. Retrovirology 2009; 6:65. [PMID: 19602283 PMCID: PMC2720380 DOI: 10.1186/1742-4690-6-65] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 07/14/2009] [Indexed: 12/22/2022] Open
Abstract
Background Although pig-tailed macaques (Macaca nemestrina) have been used in AIDS research for years, less is known about the early immunopathogenic events in this species, as compared to rhesus macaques (Macaca mulatta). Similarly, the events in early infection are well-characterized for simian immunodeficiency viruses (SIV), but less so for chimeric simian-human immunodeficiency viruses (SHIV), although the latter have been widely used in HIV vaccine studies. Here, we report the consequences of intrarectal infection with a CCR5-tropic clade C SHIV-1157ipd3N4 in pig-tailed macaques. Results Plasma and cell-associated virus was detectable in peripheral blood and intestinal tissues of all four pig-tailed macaques following intrarectal inoculation with SHIV-1157ipd3N4. We also observed a rapid and irreversible loss of CD4+ T cells at multiple mucosal sites, resulting in a marked decrease of CD4:CD8 T cell ratios 0.5–4 weeks after inoculation. This depletion targeted subsets of CD4+ T cells expressing the CCR5 coreceptor and having a CD28-CD95+ effector memory phenotype, consistent with the R5-tropism of SHIV-1157ipd3N4. All three animals that were studied beyond the acute phase seroconverted as early as week 4, with two developing cross-clade neutralizing antibody responses by week 24. These two animals also demonstrated persistent plasma viremia for >48 weeks. One of these animals developed AIDS, as shown by peripheral blood CD4+ T-cell depletion starting at 20 weeks post inoculation. Conclusion These findings indicate that SHIV-1157ipd3N4-induced pathogenesis in pig-tailed macaques followed a similar course as SIV-infected rhesus macaques. Thus, R5 SHIV-C-infection of pig-tailed macaques could provide a useful and relevant model for AIDS vaccine and pathogenesis research.
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Affiliation(s)
- On Ho
- Department of Pharmaceutics, University of Washington, Seattle, 98195, USA.
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Polacino P, Larsen K, Galmin L, Suschak J, Kraft Z, Stamatatos L, Anderson D, Barnett SW, Pal R, Bost K, Bandivdekar AH, Miller CJ, Hu SL. Differential pathogenicity of SHIV infection in pig-tailed and rhesus macaques. J Med Primatol 2009; 37 Suppl 2:13-23. [PMID: 19187427 DOI: 10.1111/j.1600-0684.2008.00325.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Differential pathogenicity has been observed in cynomolgus and rhesus macaques following primate lentivirus infection. However, little is known about the comparative susceptibility of pig-tailed macaques to lentivirus infection and diseases. METHODS We compared the in vivo infectivity and pathogenicity of a CCR5-tropic SHIV(SF162 P4) after intravenous, intravaginal or intrarectal inoculation in rhesus and pig-tailed macaques. Plasma viral load, peripheral blood CD4(+) T cell counts and clinical signs were monitored. RESULTS Both rhesus and pig-tailed macaques are similarly susceptible to SHIV(SF162 P4) infection by intravenous and mucosal routes. However, infection was significantly more robust in pig-tailed macaques than in rhesus, resulting in persistent viremia in 9/21 pig-tails vs. 2/24 rhesus (P < 0.013) and severe CD4(+) T-cell depletion in 2/21 pig-tails (vs. none in rhesus). CONCLUSIONS Together with earlier observations, our findings underscore the importance of considering host genetic and immunological factors when comparing vaccine efficacy in different macaque species.
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Affiliation(s)
- Patricia Polacino
- Washington National Primate Research Center, University of Washington, Seattle, WA, USA
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Neutralization-sensitive R5-tropic simian-human immunodeficiency virus SHIV-2873Nip, which carries env isolated from an infant with a recent HIV clade C infection. J Virol 2008; 83:1422-32. [PMID: 19019970 DOI: 10.1128/jvi.02066-08] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Human immunodeficiency virus clade C (HIV-C) accounts for >56% of all HIV infections worldwide. To investigate vaccine safety and efficacy in nonhuman primates, a pathogenic, R5-tropic, neutralization-sensitive simian-human immunodeficiency virus (SHIV) carrying HIV-C env would be desirable. We have constructed SHIV-2873Ni, an R5-tropic SHIV carrying a primary pediatric HIV-C env gene isolated from a 2-month-old Zambian infant, who died within 1 year of birth. SHIV-2873Ni was constructed using SHIV-1157ipd3N4 (R. J. Song, A. L. Chenine, R. A. Rasmussen, C. R. Ruprecht, S. Mirshahidi, R. D. Grisson, W. Xu, J. B. Whitney, L. M. Goins, H. Ong, P. L. Li, E. Shai-Kobiler, T. Wang, C. M. McCann, H. Zhang, C. Wood, C. Kankasa, W. E. Secor, H. M. McClure, E. Strobert, J. G. Else, and R. M. Ruprecht. J. Virol. 80:8729-8738, 2006) as the backbone, since the latter contains additional NF-kappaB sites in the long terminal repeats to enhance viral replicative capacity. The parental virus, SHIV-2873Ni, was serially passaged through five rhesus monkeys (RMs); SHIV-2873Nip, the resulting passaged virus, was reisolated from the fourth recipient about 1 year postinoculation. SHIV-2873Nip was replication competent in RM peripheral blood mononuclear cells of all random donors tested and was exclusively R5 tropic, and its env gene clustered with HIV-C by phylogenetic analysis; its moderate [corrected] sensitivity to neutralization led to classification as a tier 2 [corrected] virus. Indian-origin RMs were inoculated by different mucosal routes, resulting in high peak viral RNA loads. Signs of virus-induced disease include depletion of gut CD4(+) T lymphocytes, loss of memory T cells in blood, and thrombocytopenia that resulted in fatal cerebral hemorrhage. SHIV-2873Nip is a highly replication-competent, mucosally transmissible, pathogenic R5-tropic virus that will be useful to study viral pathogenesis and to assess the efficacy of immunogens targeting HIV-C Env.
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Humbert M, Rasmussen RA, Song R, Ong H, Sharma P, Chenine AL, Kramer VG, Siddappa NB, Xu W, Else JG, Novembre FJ, Strobert E, O'Neil SP, Ruprecht RM. SHIV-1157i and passaged progeny viruses encoding R5 HIV-1 clade C env cause AIDS in rhesus monkeys. Retrovirology 2008; 5:94. [PMID: 18928523 PMCID: PMC2576354 DOI: 10.1186/1742-4690-5-94] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Accepted: 10/17/2008] [Indexed: 11/17/2022] Open
Abstract
Background Infection of nonhuman primates with simian immunodeficiency virus (SIV) or chimeric simian-human immunodeficiency virus (SHIV) strains is widely used to study lentiviral pathogenesis, antiviral immunity and the efficacy of AIDS vaccine candidates. SHIV challenges allow assessment of anti-HIV-1 envelope responses in primates. As such, SHIVs should mimic natural HIV-1 infection in humans and, to address the pandemic, encode HIV-1 Env components representing major viral subtypes worldwide. Results We have developed a panel of clade C R5-tropic SHIVs based upon env of a Zambian pediatric isolate of HIV-1 clade C, the world's most prevalent HIV-1 subtype. The parental infectious proviral clone, SHIV-1157i, was rapidly passaged through five rhesus monkeys. After AIDS developed in the first animal at week 123 post-inoculation, infected blood was infused into a sixth monkey. Virus reisolated at this late stage was still exclusively R5 tropic and mucosally transmissible. Here we describe the long-term follow-up of this initial cohort of six monkeys. Two have remained non-progressors, whereas the other four gradually progressed to AIDS within 123–270 weeks post-exposure. Two progressors succumbed to opportunistic infections, including a case of SV40 encephalitis. Conclusion These data document the disease progression induced by the first mucosally transmissible, pathogenic R5 non-clade B SHIV and suggest that SHIV-1157i-derived viruses, including the late-stage, highly replication-competent SHIV-1157ipd3N4 previously described (Song et al., 2006), display biological characteristics that mirror those of HIV-1 clade C and support their expanded use for AIDS vaccine studies in nonhuman primates.
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Affiliation(s)
- Michael Humbert
- Dana-Farber Cancer Institute, 44 Binney Street, Boston, MA 02115, USA.
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Patterson LJ, Beal J, Demberg T, Florese RH, Malkevich N, Venzon D, Aldrich K, Richardson E, Kalyanaraman VS, Kalisz I, Lee EM, Montefiori DC, Robey FA, Robert-Guroff M. Replicating adenovirus HIV/SIV recombinant priming alone or in combination with a gp140 protein boost results in significant control of viremia following a SHIV89.6P challenge in Mamu-A*01 negative rhesus macaques. Virology 2008; 374:322-37. [PMID: 18252262 DOI: 10.1016/j.virol.2007.12.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Revised: 11/13/2007] [Accepted: 12/24/2007] [Indexed: 11/27/2022]
Abstract
Previously, replicating adenovirus type 5 host range (Ad5hr)-HIV/SIV recombinant priming in combination with SIV envelope boosting, resulted in significant, durable protection in 39% of rhesus macaques after SIVmac251 challenge. Both Env-specific antibody mediating ADCC, and cellular immunity correlated with protection. Here we evaluate the relative immunogenicities of novel HIV proteins and their contribution to protection in a SHIV89.6P model. All groups were primed with Ad-HIVenv89.6P, SIVgag239, and SIVnef239 recombinants. One group was not boosted, one received HIV89.6Pgp140DeltaCFI protein, and one a novel HIV-1 poly-peptide "peptomer". The HIV89.6Pgp140DeltaCFI protein in adjuvant strongly boosted Env-specific antibody and memory T cell responses in blood and tissue, resulting in significant reductions in acute and set point viremia. Macaques not boosted, showed a significant reduction in set point viremia, a full 32 weeks after the last Ad priming immunization. The HIV peptomer-boosted group showed a trend toward chronic viremia reduction, but was not protected.
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Affiliation(s)
- L Jean Patterson
- Vaccine Branch, National Cancer Institute, Bethesda, MD 20892, USA
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Protection of macaques against vaginal SHIV challenge by systemic or mucosal and systemic vaccinations with HIV-envelope. AIDS 2008; 22:339-48. [PMID: 18195560 DOI: 10.1097/qad.0b013e3282f3ca57] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Worldwide, the majority of human immunodeficiency virus (HIV) infections occur by heterosexual transmission. Thus, the development of a vaccine that can prevent intravaginal HIV infection is an important goal of AIDS vaccine research. OBJECTIVES To determine which single or combination of systemic and mucosal routes of immunizations of female rhesus macaques with an HIV-1 SF162 envelope protein vaccine induced protection against intravaginal challenge with SHIV. DESIGN Female rhesus macaques were immunized with an HIV-1 SF162 envelope protein vaccine administered systemically (intramuscularly), or mucosally (intranasally), or as a sequential combination of both routes. The macaques were then challenged intravaginally with SHIV SF162P4, expressing an envelope that is closely matched (homologous) to the vaccine. RESULTS Macaques receiving intramuscular immunizations, alone or in combination with intranasal immunizations, were protected from infection, with no detectable plasma viral RNA, provirus, or seroconversion to nonvaccine viral proteins, and better preservation of intestinal CD4+ T cells. Serum neutralizing antibodies against the challenge virus appeared to correlate with protection. CONCLUSIONS The results of this study demonstrate that, in the nonhuman primate model, it is possible for vaccine-elicited immune responses to prevent infection after intravaginal administration of virus.
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Rasmussen RA, Ong H, Song R, Chenine AL, Ayash-Rashkovsky M, Hu SL, Polacino P, Else JG, Novembre FJ, Ruprecht RM. Efficacy of a multigenic protein vaccine containing multimeric HIV gp160 against heterologous SHIV clade C challenges. AIDS 2007; 21:1841-8. [PMID: 17721091 DOI: 10.1097/qad.0b013e32828684ea] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine whether multigenic protein immunogens including native, trimeric HIV clade C (HIV-C) gp160 could cross-protect macaques against mucosal challenge with clade C (SHIV-C) mismatched for env. DESIGN Because AIDS vaccine recipients are unlikely to encounter exactly matched HIV strains and to represent the diversity of locally circulating HIV-C strains, we selected env genes to generate the gp160 immunogen and SHIV-C from different, recently infected infants of the same clinical cohort in Zambia. In a model of postnatal HIV-C transmission, infant macaques were immunized with soluble viral proteins, including trimeric HIV1084i Env, and challenged with SHIV-1157ip; protein-only vaccination was compared with a DNA prime/protein boost strategy. METHODS All vaccinated and control monkeys were exposed orally to low-dose, R5-tropic SHIV-1157ip encoding heterologous env. Animals with no or only transient infection were rechallenged intrarectally with a high dose of R5 SHIV-1157ipd3N4, a 'late', animal-evolved SHIV-1157ip variant. Animals were followed prospectively for immune parameters and viral RNA loads. RESULTS Vaccination induced cross-neutralizing antibodies. Compared to controls, vaccinees had significantly lower peak viral RNA loads, and one vaccine recipient remained completely virus-free, even in lymphoid tissues. There was a trend for the protein-only vaccine to yield better protection than the combined modality approach. CONCLUSION Protein-only immunogens induced significant protection against heterologous viruses encoding env from locally circulating viruses.
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Affiliation(s)
- Robert A Rasmussen
- Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
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Albert J, Chiodi F, Fenyö EM. Introduction: HIV neutralizing antibodies: relevance to pathogenesis and vaccines. J Intern Med 2007; 262:2-4. [PMID: 17598811 DOI: 10.1111/j.1365-2796.2007.01835.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J Albert
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
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