CTLA4 blockade and GM-CSF combination immunotherapy alters the intratumor balance of effector and regulatory T cells

SA Quezada, KS Peggs, MA Curran… - The Journal of clinical …, 2006 - Am Soc Clin Investig
CTL-associated antigen 4 (CTLA4) blockade releases inhibitory controls on T cell activation
and proliferation, inducing antitumor immunity in both preclinical and early clinical trials. We …

Both intratumoral regulatory T cell depletion and CTLA-4 antagonism are required for maximum efficacy of anti-CTLA-4 antibodies

BM Lax, JR Palmeri, EA Lutz, A Sheen… - Proceedings of the …, 2023 - National Acad Sciences
Anti-CTLA-4 antibodies have successfully elicited durable tumor regression in the clinic;
however, long-term benefit is limited to a subset of patients for select cancer indications. The …

Combination of tumor Site–Located CTL-Associated antigen-4 blockade and systemic regulatory T-cell depletion induces Tumor-Destructive immune responses

S Tuve, BM Chen, Y Liu, TL Cheng, P Touré, PS Sow… - Cancer research, 2007 - AACR
Accumulating data indicate that tumor-infiltrating regulatory T cells (Treg) are present in
human tumors and locally suppress antitumor immune cells. In this study, we found an …

TLR1/2 ligand enhances antitumor efficacy of CTLA-4 blockade by increasing intratumoral Treg depletion

N Sharma, J Vacher, JP Allison - Proceedings of the …, 2019 - National Acad Sciences
Immune checkpoint inhibitors such as anti–CTLA-4 antibody are widely accepted
therapeutic options for many cancers, but there is still a considerable gap in achieving their …

Fc-dependent depletion of tumor-infiltrating regulatory T cells co-defines the efficacy of anti–CTLA-4 therapy against melanoma

TR Simpson, F Li, W Montalvo-Ortiz… - Journal of Experimental …, 2013 - rupress.org
Treatment with monoclonal antibody specific for cytotoxic T lymphocyte–associated antigen
4 (CTLA-4), an inhibitory receptor expressed by T lymphocytes, has emerged as an effective …

CTLA4 blockade expands FoxP3+ regulatory and activated effector CD4+ T cells in a dose-dependent fashion

B Kavanagh, S O'Brien, D Lee, Y Hou… - Blood, The Journal …, 2008 - ashpublications.org
Cytotoxic T lymphocyte–associated antigen 4 (CTLA4) delivers inhibitory signals to activated
T cells. CTLA4 is constitutively expressed on regulatory CD4+ T cells (Tregs), but its role in …

Blockade of CTLA-4 on both effector and regulatory T cell compartments contributes to the antitumor activity of anti–CTLA-4 antibodies

KS Peggs, SA Quezada, CA Chambers… - Journal of Experimental …, 2009 - rupress.org
Cytotoxic T lymphocyte–associated antigen 4 (CTLA-4) is a critical negative regulator of
immune responses. Uniquely among known inhibitory receptors, its genetic ablation results …

Two distinct mechanisms of augmented antitumor activity by modulation of immunostimulatory/inhibitory signals

J Mitsui, H Nishikawa, D Muraoka, L Wang… - Clinical Cancer …, 2010 - AACR
Purpose: Blockade of CTL-associated antigen-4 (CTLA-4), an inhibitory immunomodulatory
molecule on T cells, has been shown to enhance T-cell responses and induce tumor …

Anti–CTLA-4 activates intratumoral NK cells and combined with IL15/IL15Rα complexes enhances tumor control

E Sanseviero, EM O'Brien, JR Karras… - Cancer immunology …, 2019 - AACR
Antibodies targeting CTLA-4 induce durable responses in some patients with melanoma
and are being tested in a variety of human cancers. However, these therapies are ineffective …

Differential control of human Treg and effector T cells in tumor immunity by Fc-engineered anti–CTLA-4 antibody

D Ha, A Tanaka, T Kibayashi… - Proceedings of the …, 2019 - National Acad Sciences
Anti–CTLA-4 mAb is efficacious in enhancing tumor immunity in humans. CTLA-4 is
expressed by conventional T cells upon activation and by naturally occurring FOXP3+ CD4+ …