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CTLA-4 is a member of the immunoglobulin superfamily that is expressed by activated T cells and transmits an inhibitory signal to T cells. CTLA-4 is homologous to the T-cell co-stimulatory protein, CD28, and both molecules bind to CD80 and CD86, also called B7-1 and B7-2 respectively, on antigen-presenting cells. CTLA-4 binds CD80 and CD86 with ...
The first checkpoint antibody approved by the FDA was ipilimumab, approved in 2011 for treatment of melanoma. [2] It blocks the immune checkpoint molecule CTLA-4.Clinical trials have also shown some benefits of anti-CTLA-4 therapy on lung cancer or pancreatic cancer, specifically in combination with other drugs.
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Ipilimumab, sold under the brand name Yervoy, is a monoclonal antibody medication that works to activate the immune system by targeting CTLA-4, a protein receptor that downregulates the immune system.
The survival of CD25 + CD4 + T reg cells is dependent upon interleukin 2 (IL-2), [4] while in vitro differentiation of T h 3 cells is enhanced by TGF-β, IL-4, and IL-10. Findings suggest that T h 3 cells are a different lineage from naturally arising CD25 + CD4 + T reg cells, but it is still unclear whether T h 3 cells are the same as induced ...
B7 is a type of integral membrane protein found on activated antigen-presenting cells (APC) that, when paired with either a CD28 or CD152 surface protein on a T cell, can produce a costimulatory signal or a coinhibitory signal to enhance or decrease the activity of a MHC-TCR signal between the APC and the T cell, respectively.
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