The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
Enhancing SIV-specific immunity in vivo by PD-1 blockade
Open accessAbstract
Chronic immunodeficiency virus infections are characterized by dysfunctional cellular and humoral antiviral immune responses. As such, immune modulatory therapies that enhance and/or restore the function of virus-specific immunity may protect from disease progression. Here we investigate the safety and immune restoration potential of blockade of the co-inhibitory receptor programmed death 1 (PD-1) during chronic simian immunodeficiency virus (SIV) infection in macaques. We demonstrate that PD-1 blockade using an antibody to PD-1 is well tolerated and results in rapid expansion of virus-specific CD8 T cells with improved functional quality. This enhanced T-cell immunity was seen in the blood and also in the gut, a major reservoir of SIV infection. PD-1 blockade also resulted in proliferation of memory B cells and increases in SIV envelope-specific antibody. These improved immune responses were associated with significant reductions in plasma viral load and also prolonged the survival of SIV-infected macaques. Blockade was effective during the early (week 10) as well as late (∼week 90) phases of chronic infection even under conditions of severe lymphopenia. These results demonstrate enhancement of both cellular and humoral immune responses during a pathogenic immunodeficiency virus infection by blocking a single inhibitory pathway and identify a novel therapeutic approach for control of human immunodeficiency virus infections.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Two subsets of memory T lymphocytes with distinct homing potentials and effector functions
Sallusto, F., Lenig, D., Förster, R., Lipp, M., & Lanzavecchia, A. (1999) · Nature · doi:10.1038/44385 · Cited by 5,846
PD-1 expression on HIV-specific T cells is associated with T-cell exhaustion and disease progression
Day, C. L., Kaufmann, D. E., Kiepiela, P., Brown, J. A., Moodley, E. S., Reddy, S., Mackey, E. W., Miller, J. D., Leslie, A. J., DePierres, C., et al. (2006) · Nature · doi:10.1038/nature05115 · Cited by 2,680
Self-citationMolecular Signature of CD8+ T Cell Exhaustion during Chronic Viral Infection
Wherry, E. J., Ha, S.-J., Kaech, S. M., Haining, W. N., Sarkar, S., Kalia, V., Subramaniam, S., Blattman, J. N., Barber, D. L., & Ahmed, R. (2007) · Immunity · doi:10.1016/j.immuni.2007.09.006 · Cited by 2,103
Self-citationViral Immune Evasion Due to Persistence of Activated T Cells Without Effector Function
Zajac, A. J., Blattman, J. N., Murali-Krishna, K., Sourdive, D. J. D., Suresh, M., Altman, J. D., & Ahmed, R. (1998) · The Journal of Experimental Medicine · doi:10.1084/jem.188.12.2205 · Cited by 1,978
Self-citationKaech, S. M., Tan, J. T., Wherry, E. J., Konieczny, B. T., Surh, C. D., & Ahmed, R. (2003) · Nature Immunology · doi:10.1038/ni1009 · Cited by 1,830
Self-citationUpregulation of PD-1 expression on HIV-specific CD8+ T cells leads to reversible immune dysfunction
Trautmann, L., Janbazian, L., Chomont, N., Said, E. A., Gimmig, S., Bessette, B., Boulassel, M.-R., Delwart, E., Sepulveda, H., Balderas, R. S., et al. (2006) · Nature Medicine · doi:10.1038/nm1482 · Cited by 1,565
PD-1 is a regulator of virus-specific CD8+ T cell survival in HIV infection
Petrovas, C., Casazza, J. P., Brenchley, J. M., Price, D. A., Gostick, E., Adams, W. C., Precopio, M. L., Schacker, T., Roederer, M., Douek, D. C., et al. (2006) · The Journal of Experimental Medicine · doi:10.1084/jem.20061496 · Cited by 889
Cited by
The blockade of immune checkpoints in cancer immunotherapy
Pardoll, D. M. (2012) · Nature Reviews Cancer · doi:10.1038/nrc3239 · Cited by 13,838
Wherry, E. J. (2011) · Nature Immunology · doi:10.1038/ni.2035 · Cited by 4,062
Taube, J. M., Klein, A., Brahmer, J. R., Xu, H., Pan, X., Kim, J. H., Chen, L., Pardoll, D. M., Topalian, S. L., & Anders, R. A. (2014) · Clinical Cancer Research · doi:10.1158/1078-0432.ccr-13-3271 · Cited by 2,324
Redefining Chronic Viral Infection
Virgin, H. W., Wherry, E. J., & Ahmed, R. (2009) · Cell · doi:10.1016/j.cell.2009.06.036 · Cited by 1,031
Self-citationWang, Z., Aguilar, E. G., Luna, J. I., Dunai, C., Khuat, L. T., Le, C. T., Mirsoian, A., Minnar, C. M., Stoffel, K. M., Sturgill, I. R., et al. (2019) · Nature Medicine · doi:10.1038/s41591-018-0221-5 · Cited by 865
Metadata
- Authors
- Velu, V., Titanji, K., Zhu, B., Husain, S., Pladevega, A., Lai, L., Vanderford, T. H., Chennareddi, L., Silvestri, G., Freeman, G. J., Ahmed, R., & Amara, R. R.
- Venue
- Nature
- Published
- 2008-12-10
- Volume
- 458
- Issue
- 7235
- Pages
- 206-210
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2058798829
- Cited by
- 771
- References
- 7
- FWCI
- 13.55
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Enhancing SIV-specific immunity in vivo by PD-1 blockade. https://app.cochat.ai/papers/10.1038/nature07662
- The paper
- Velu, V., Titanji, K., Zhu, B., Husain, S., Pladevega, A., Lai, L., Vanderford, T. H., Chennareddi, L., Silvestri, G., Freeman, G. J., Ahmed, R., & Amara, R. R. (2009). Enhancing SIV-specific immunity in vivo by PD-1 blockade. Nature. https://doi.org/10.1038/nature07662
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
