Journal ArticleDOI
Enhancement of antitumor immunity by CTLA-4 blockade.
TLDR
In vivo administration of antibodies to CTLA-4 resulted in the rejection of tumors, including preestablished tumors, and this rejection resulted in immunity to a secondary exposure to tumor cells, suggesting that blockade of the inhibitory effects of CTLA4 can allow for, and potentiate, effective immune responses against tumor cells.Abstract:
One reason for the poor immunogenicity of many tumors may be that they cannot provide signals for CD28-mediated costimulation necessary to fully activate T cells. It has recently become apparent that CTLA-4, a second counterreceptor for the B7 family of costimulatory molecules, is a negative regulator of T cell activation. Here, in vivo administration of antibodies to CTLA-4 resulted in the rejection of tumors, including preestablished tumors. Furthermore, this rejection resulted in immunity to a secondary exposure to tumor cells. These results suggest that blockade of the inhibitory effects of CTLA-4 can allow for, and potentiate, effective immune responses against tumor cells.read more
Citations
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Safety, activity, and immune correlates of anti-PD-1 antibody in cancer.
Suzanne L. Topalian,F. Stephen Hodi,Julie R. Brahmer,Scott N. Gettinger,David Smith,David F. McDermott,John D. Powderly,Richard D. Carvajal,Jeffrey A. Sosman,Michael B. Atkins,Philip D. Leming,David R. Spigel,Scott J. Antonia,Leora Horn,Charles G. Drake,Drew M. Pardoll,Lieping Chen,William H. Sharfman,Robert A. Anders,Janis M. Taube,Tracee L. McMiller,Haiying Xu,Alan J. Korman,Maria Jure-Kunkel,Shruti Agrawal,Dan McDonald,Georgia Kollia,Ashok Kumar Gupta,Jon M. Wigginton,Mario Sznol +29 more
TL;DR: Anti-PD-1 antibody produced objective responses in approximately one in four to one in five patients with non-small-cell lung cancer, melanoma, or renal-cell cancer; the adverse-event profile does not appear to preclude its use.
Journal ArticleDOI
The blockade of immune checkpoints in cancer immunotherapy
TL;DR: Preliminary clinical findings with blockers of additional immune-checkpoint proteins, such as programmed cell death protein 1 (PD1), indicate broad and diverse opportunities to enhance antitumour immunity with the potential to produce durable clinical responses.
Journal ArticleDOI
Safety and Activity of Anti–PD-L1 Antibody in Patients with Advanced Cancer
Julie R. Brahmer,Scott S. Tykodi,Scott S. Tykodi,Laura Q.M. Chow,Wen-Jen Hwu,Suzanne L. Topalian,Patrick Hwu,Charles G. Drake,Luis H. Camacho,John S. Kauh,Kunle Odunsi,Henry C. Pitot,Omid Hamid,Shailender Bhatia,Renato G. Martins,Keith D. Eaton,Shuming Chen,Theresa M. Salay,Suresh Alaparthy,Joseph F. Grosso,Alan J. Korman,Susan M. Parker,Shruti Agrawal,Stacie M. Goldberg,Drew M. Pardoll,Ashok Kumar Gupta,Jon M. Wigginton +26 more
TL;DR: Antibody-mediated blockade of PD-L1 induced durable tumor regression and prolonged stabilization of disease in patients with advanced cancers, including non-small-cell lung cancer, melanoma, and renal-cell cancer.
Journal ArticleDOI
Pembrolizumab for the treatment of non-small cell lung cancer
Edward B. Garon,Naiyer A. Rizvi,Rina Hui,Natasha B. Leighl,Ani Sarkis Balmanoukian,Joseph Paul Eder,Amita Patnaik,Charu Aggarwal,Matthew A. Gubens,Leora Horn,Enric Carcereny,Myung-Ju Ahn,Enriqueta Felip,Jong-Seok Lee,Matthew D. Hellmann,Omid Hamid,Jonathan W. Goldman,Jean-Charles Soria,Marisa Dolled-Filhart,Ruth Z. Rutledge,Jin Zhang,Jared Lunceford,Reshma A. Rangwala,Gregory M. Lubiniecki,Charlotte Roach,Kenneth Emancipator,Leena Gandhi +26 more
TL;DR: Pembrolizumab had an acceptable side-effect profile and showed antitumor activity in patients with advanced non-small-cell lung cancer and PD-L1 expression in at least 50% of tumor cells correlated with improved efficacy of pembrolIZumab.
Journal ArticleDOI
Pembrolizumab versus Ipilimumab in Advanced Melanoma
Caroline Robert,Caroline Robert,Caroline Robert,Jacob Schachter,Georgina V. Long,Ana Arance,Jean-Jacques Grob,Laurent Mortier,Laurent Mortier,Adil Daud,Matteo S. Carlino,Catriona M. McNeil,Michal Lotem,James Larkin,Paul Lorigan,Bart Neyns,Christian U. Blank,Omid Hamid,Christine Mateus,Christine Mateus,Ronnie Shapira-Frommer,Ronnie Shapira-Frommer,Michele Kosh,Honghong Zhou,Nageatte Ibrahim,Scot Ebbinghaus,Antoni Ribas +26 more
TL;DR: The anti-PD-1 antibody pembrolizumab prolonged progression-free survival and overall survival and had less high-grade toxicity than did ipilimumab in patients with advanced melanoma.
References
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Journal ArticleDOI
Vaccination with Irradiated Tumor Cells Engineered to Secrete Murine Granulocyte-Macrophage Colony-Stimulating Factor Stimulates Potent, Specific, and Long-Lasting Anti-Tumor Immunity
Glenn Dranoff,Elizabeth M. Jaffee,Audrey J. Lazenby,Paul Golumbek,Hyam I. Levitsky,Katja Brose,Valerie Jackson,Hirofumi Hamada,Drew M. Pardoll,Richard C. Mulligan +9 more
TL;DR: The results have important implications for the clinical use of genetically modified tumor cells as therapeutic cancer vaccines and the levels of anti-tumor immunity reported previously in cytokine gene transfer studies involving live, transduced cells could be achieved through the use of irradiated cells alone.
Journal ArticleDOI
Lymphoproliferative Disorders with Early Lethality in Mice Deficient in Ctla-4
Paul Waterhouse,Josef M. Penninger,Emma Timms,Andrew Wakeham,Arda Shahinian,Kelvin P. Lee,Craig B. Thompson,Henrik Griesser,Tak W. Mak +8 more
TL;DR: Although CTLA-4-deficient T cells proliferated spontaneously and strongly when stimulated through the T cell receptor, they were sensitive to cell death induced by cross-linking of the Fas receptor and by gamma irradiation, and is vital for the control of lymphocyte homeostasis.
Journal ArticleDOI
CTLA-4 can function as a negative regulator of T cell activation
Theresa L. Walunas,Deborah J. Lenschow,Christina Y. Bakker,Peter S. Linsley,Gordon J. Freeman,Jonathan Green,Craig B. Thompson,Craig B. Thompson,Jeffrey A. Bluestone +8 more
TL;DR: Results suggest that the MAb may obstruct the interaction of CTLA-4 with its natural ligand and block a negative signal, or directly signal T cells to down-regulate immune function.
Journal ArticleDOI
CD28 and CTLA-4 have opposing effects on the response of T cells to stimulation.
TL;DR: It is shown here that the presence of low levels of B7-2 on freshly explanted T cells can partially inhibit T cell proliferation, and this inhibition is mediated by interactions with CTLA-4, which strongly suggests that the outcome of T cell antigen receptor stimulation is regulated by CD28 costimulatory signals, as well as inhibitory signals derived from CTla-4.
Journal ArticleDOI
CTLA-4 is a second receptor for the B cell activation antigen B7.
Peter S. Linsley,William E. Brady,Mark Urnes,Laura Sue Grosmaire,Nitin K. Damle,Jeffrey A. Ledbetter +5 more
TL;DR: These findings provide direct evidence that, like its structural homologue CD28, CTLA- 4 is able to bind the B7 counter-receptor on activated B cells.
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