Anti-CTLA-4 antibodies of IgG2a isotype enhance antitumor activity through reduction of intratumoral regulatory T cells.
Mark J. Selby,John J. Engelhardt,Michael Quigley,Karla A. Henning,Timothy Chen,Mohan Srinivasan,Alan J. Korman +6 more
Reads0
Chats0
TLDR
Data suggest that anti-CTLA-4 promotes antitumor activity by a selective reduction of intratumoral Tregs along with concomitant activation of Teffs.Abstract:
Antitumor activity of CTLA-4 antibody blockade is thought to be mediated by interfering with the negative regulation of T-effector cell (Teff) function resulting from CTLA-4 engagement by B7-ligands. In addition, a role for CTLA-4 on regulatory T cells (Treg), wherein CTLA-4 loss or inhibition results in reduced Treg function, may also contribute to antitumor responses by anti-CTLA-4 treatment. We have examined the role of the immunoglobulin constant region on the antitumor activity of anti-CTLA-4 to analyze in greater detail the mechanism of action of anti-CTLA-4 antibodies. Anti-CTLA-4 antibody containing the murine immunoglobulin G (IgG)2a constant region exhibits enhanced antitumor activity in subcutaneous established MC38 and CT26 colon adenocarcinoma tumor models compared with anti-CTLA-4 containing the IgG2b constant region. Interestingly, anti-CTLA-4 antibodies containing mouse IgG1 or a mutated mouse IgG1-D265A, which eliminates binding to all Fcγ receptors (FcγR), do not show antitumor activity in these models. Assessment of Teff and Treg populations at the tumor and in the periphery showed that anti-CTLA-4-IgG2a mediated a rapid and dramatic reduction of Tregs at the tumor site, whereas treatment with each of the isotypes expanded Tregs in the periphery. Expansion of CD8 + Teffs is observed with both the IgG2a and IgG2b anti-CTLA-4 isotypes, resulting in a superior Teff to Treg ratio for the IgG2a isotype. These data suggest that anti-CTLA-4 promotes antitumor activity by a selective reduction of intratumoral Tregs along with concomitant activation of Teffs. Cancer Immunol Res; 1(1); 32–42. ©2013 AACR .read more
Citations
More filters
Journal ArticleDOI
Immune checkpoint blockade: a common denominator approach to cancer therapy
TL;DR: The immune system recognizes and is poised to eliminate cancer but is held in check by inhibitory receptors and ligands, so drugs interrupting immune checkpoints, such as anti-CTLA-4, anti-PD-1, and others in early development, can unleash anti-tumor immunity and mediate durable cancer regressions.
Journal ArticleDOI
Tumour-associated macrophages as treatment targets in oncology
Alberto Mantovani,Federica Marchesi,Federica Marchesi,Alberto Malesci,Alberto Malesci,Luigi Laghi,Paola Allavena +6 more
TL;DR: It is surmised that TAMs can provide tools to tailor the use of cytoreductive therapies and immunotherapy in a personalized medicine approach, and that TAM-focused therapeutic strategies have the potential to complement and synergize with both chemotherapy and immunotherapies.
Journal ArticleDOI
Fundamental Mechanisms of Immune Checkpoint Blockade Therapy
TL;DR: The current state of understanding of T-cell costimulatory mechanisms and checkpoint blockade, primarily of CTLA4 and PD-1, is reviewed, and conceptual gaps in knowledge are highlighted.
Journal ArticleDOI
Fc-dependent depletion of tumor-infiltrating regulatory T cells co-defines the efficacy of anti-CTLA-4 therapy against melanoma.
Tyler R. Simpson,Fubin Li,Welby Montalvo-Ortiz,Manuel A. Sepulveda,Katharina Bergerhoff,Frederick Arce,Claire Roddie,Jake Y. Henry,Hideo Yagita,Jedd D. Wolchok,Karl S. Peggs,Jeffrey V. Ravetch,James P. Allison,Sergio A. Quezada +13 more
TL;DR: Anti–CTLA-4 antibody induces selective depletion of T reg cells within tumor lesions in a manner that is dependent on the presence of Fc gamma receptor-expressing macrophages within the tumor microenvironment.
Journal ArticleDOI
Regulatory T cells in cancer immunotherapy
Atsushi Tanaka,Shimon Sakaguchi +1 more
TL;DR: It is hoped that combination of Treg-cell targeting with the activation of tumor-specific effector T cells will make the current cancer immunotherapy more effective.
References
More filters
Journal ArticleDOI
Improved Survival with Ipilimumab in Patients with Metastatic Melanoma.
F. Stephen Hodi,Steven J. O'Day,David F. McDermott,R. W. Weber,Jeffrey A. Sosman,John B. A. G. Haanen,Rene Gonzalez,Caroline Robert,Dirk Schadendorf,Jessica C. Hassel,Wallace Akerley,Alfons J.M. van den Eertwegh,Jose Lutzky,Paul Lorigan,Julia Vaubel,Gerald P. Linette,David W. Hogg,Christian H. Ottensmeier,Céleste Lebbé,Christian Peschel,Ian Quirt,Joseph I. Clark,Jedd D. Wolchok,Jeffrey S. Weber,Jason Tian,Michael Yellin,Geoffrey M. Nichol,Axel Hoos,Walter J. Urba +28 more
TL;DR: Ipilimumab, with or without a gp100 peptide vaccine, as compared with gp100 alone, improved overall survival in patients with previously treated metastatic melanoma.
Journal ArticleDOI
Enhancement of antitumor immunity by CTLA-4 blockade.
TL;DR: 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.
Journal ArticleDOI
Inhibitory Fc receptors modulate in vivo cytotoxicity against tumor targets.
TL;DR: It is demonstrated that Fc-receptor-dependent mechanisms contribute substantially to the action of cytotoxic antibodies against tumors and indicate that an optimal antibody against tumors would bind preferentially to activation Fc receptors and minimally to the inhibitory partner FcγRIIB.
Journal ArticleDOI
CTLA-4 Control over Foxp3+ Regulatory T Cell Function
Kajsa Wing,Yasushi Onishi,Yasushi Onishi,Paz Prieto-Martin,Tomoyuki Yamaguchi,Makoto Miyara,Zoltan Fehervari,Takashi Nomura,Shimon Sakaguchi,Shimon Sakaguchi +9 more
TL;DR: It is shown that a specific deficiency of cytotoxic T lymphocyte antigen 4 (CTLA-4) in Tregs results in spontaneous development of systemic lymphoproliferation, fatal T cell–mediated autoimmune disease, and hyperproduction of immunoglobulin E in mice.
Journal ArticleDOI
Cytotoxic T lymphocyte-associated antigen 4 plays an essential role in the function of CD25(+)CD4(+) regulatory cells that control intestinal inflammation.
TL;DR: It is reported that the Treg cells that control intestinal inflammation express the same phenotype (CD25+CD45RBlowCD4+) as those that control autoimmunity, suggesting that Treg cell function contributes to the immune suppression characteristic of CTLA-4 signaling.
Related Papers (5)
Improved Survival with Ipilimumab in Patients with Metastatic Melanoma.
F. Stephen Hodi,Steven J. O'Day,David F. McDermott,R. W. Weber,Jeffrey A. Sosman,John B. A. G. Haanen,Rene Gonzalez,Caroline Robert,Dirk Schadendorf,Jessica C. Hassel,Wallace Akerley,Alfons J.M. van den Eertwegh,Jose Lutzky,Paul Lorigan,Julia Vaubel,Gerald P. Linette,David W. Hogg,Christian H. Ottensmeier,Céleste Lebbé,Christian Peschel,Ian Quirt,Joseph I. Clark,Jedd D. Wolchok,Jeffrey S. Weber,Jason Tian,Michael Yellin,Geoffrey M. Nichol,Axel Hoos,Walter J. Urba +28 more
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
Nivolumab plus Ipilimumab in Advanced Melanoma
Jedd D. Wolchok,Harriet Kluger,Margaret K. Callahan,Michael A. Postow,Naiyer A. Rizvi,Alexander M. Lesokhin,Neil H. Segal,Charlotte E. Ariyan,Ruth-Ann Gordon,Kathleen Reed,Matthew M. Burke,Anne Caldwell,Stephanie Anne Kronenberg,Blessing Agunwamba,Xiaoling Zhang,Israel Lowy,Hector David Inzunza,William Feely,Christine Horak,Quan Hong,Alan J. Korman,Jon M. Wigginton,Ashok Kumar Gupta,Mario Sznol +23 more
Combined Nivolumab and Ipilimumab or Monotherapy in Untreated Melanoma.
James Larkin,Vanna Chiarion-Sileni,Rene Gonzalez,Jean-Jacques Grob,C. Lance Cowey,Christopher D. Lao,Dirk Schadendorf,Reinhard Dummer,Michael Smylie,Piotr Rutkowski,Pier Francesco Ferrucci,A. Hill,John Wagstaff,Matteo S. Carlino,John B A G Haanen,Michele Maio,Ivan Marquez-Rodas,Grant A. McArthur,Paolo A. Ascierto,Georgina V. Long,Margaret K. Callahan,Michael A. Postow,Michael A. Postow,Kenneth F. Grossmann,Mario Sznol,Brigitte Dréno,Lars Bastholt,Arvin Yang,Linda Rollin,Christine Horak,F. Stephen Hodi,Jedd D. Wolchok,Jedd D. Wolchok +32 more