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PD-1 CTLA4 LAG3

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https://www.readbyqxmd.com/read/28890294/analysis-of-non-small-cell-lung-cancer-microenvironment-indicates-preponderance-of-t-cell-exhaustion-marker-expression
#1
Hui Zhou, Tingwei Liu, Zanfeng Wang
Lung cancer metastasis causes 70% of an estimated 1.4 million deaths per annum. The major shortcoming in lung cancer is the tendency to have inherent or develop acquired resistance to chemotherapy. It is now evolving that such resistance might develop due to differential contribution and interaction with tumor microenvironment, stromal cells, and the extracellular matrix. The objective of the current study was to define the lung cancer tumor microenvironment. We have identified multiple tumor-infiltrating T lymphocyte subsets in patients with lung cancer, which were independent of disease stage...
September 7, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28648905/antibodies-against-immune-checkpoint-molecules-restore-functions-of-tumor-infiltrating-t-cells-in-hepatocellular-carcinomas
#2
Guoying Zhou, Dave Sprengers, Patrick P C Boor, Michail Doukas, Hannah Schutz, Shanta Mancham, Alexander Pedroza-Gonzalez, Wojciech G Polak, Jeroen de Jonge, Marcia Gaspersz, Haidong Dong, Kris Thielemans, Qiuwei Pan, Jan N M IJzermans, Marco J Bruno, Jaap Kwekkeboom
BACKGROUND & AIMS: Ligand binding to inhibitory receptors on immune cells, such as programmed cell death 1 (PD-1) and cytotoxic T-lymphocyte associated protein 4 (CTLA4), downregulates the T-cell-mediated immune response (called immune checkpoints). Antibodies that block these receptors increase anti-tumor immunity in patients with melanoma, non-small cell lung cancer, and renal cell cancer. Tumor-infiltrating CD4(+) and CD8(+) T cells in patients with hepatocellular carcinoma (HCC) have been found to be functionally compromised...
June 22, 2017: Gastroenterology
https://www.readbyqxmd.com/read/23188506/durable-adoptive-immunotherapy-for-leukemia-produced-by-manipulation-of-multiple-regulatory-pathways-of-cd8-t-cell-tolerance
#3
Melissa M Berrien-Elliott, Stephanie R Jackson, Jennifer M Meyer, Craig J Rouskey, Thanh-Long M Nguyen, Hideo Yagita, Philip D Greenberg, Richard J DiPaolo, Ryan M Teague
Tolerizing mechanisms within the host and tumor microenvironment inhibit T-cell effector functions that can control cancer. These mechanisms blunt adoptive immunotherapy with infused T-cells due to a complex array of signals that determine T-cell tolerance, survival, or deletion. Ligation of the negative regulatory receptors CTLA4, PD-1(PDCD1), or LAG3 on T-cells normally hinders their response to antigen through nonredundant biochemical processes that interfere with stimulatory pathways. In this study, we used an established mouse model of T-cell tolerance to define the roles of these inhibitory receptors in regulating CD8(+) T-cell tolerance during adoptive immunotherapy to treat leukemia...
January 15, 2013: Cancer Research
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