Cytokine-induced killer (CIK) cells are in vitro-expanded cells harboring potent toxicity against tumor cells. Recently, it was identified that the cytotoxicity and proliferation of CIK cells are restricted by a prolonged CIK cell culture period. Cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) serves a negative role in T cell activation and proliferation. This study aims to determine wheth...

Cytotoxic T-lymphocyte-associated antigen-4 (CTLA-4) is a potent immunoregulatory molecule that downregulates T-cell activation and thus influences the antitumor immune response. CTLA-4 polymorphisms are associated with various cancers, and CTLA-4 mRNA/protein increased expression is found in several tumor types. However, most of the studies are based on peripheral blood mononuclear cells, and ...

Cytotoxic T-lymphocyte-associated antigen-4 (CTLA-4) is an immunoregulatory molecule expressed by activated T cells and resting CD4+CD25 T cells. In patients with advanced melanoma, anti-CTLA-4 antibody therapy achieves cancer regression in 15% of patients. Treatment may be associated with grade III/IV autoimmune manifestations that included dermatitis, enterocolitis, hepatitis, uveitis, and ra...

background: ovarian cancer is a relatively common cancer among postmenopausal women. nowadays, there is controversy about immunotherapy of ovarian cancer patients with interleukins such as interferon to reach better out come in prognosis of patients under chemotherapy. ctla-4 is a gene, which has an important role in homeostasis and regulation of immune response. inhibitory nature of ctla-4 is ...

BACKGROUND Cytotoxic T lymphocyte-associated antigen-4 (CTLA-4) plays a critical role in downregulation of antigen-activated immune response and polymorphisms at the CTLA-4 gene have been shown to be associated with several autoimmune diseases including type-1 diabetes (T1D). The etiological mutation was mapped to the CT60-A/G single nucleotide polymorphism (SNP) that is believed to control the...

Purpose: Monoclonal antibodies (mAb) that block programmed death (PD)-1 or cytotoxic T lymphocyte antigen (CTLA-4) receptors have been associated with durable clinical responses against a variety of cancer types and hold great potential as novel cancer therapeutics. Recent evidence suggest that targeted blockade of multiple immunosuppressive pathways can induce synergistic antitumor

While cytotoxic T lymphocyte antigen-4 (CTLA-4) negatively regulates T-cell receptor (TCR)-driven interleukin (IL)-2 production and proliferation, little is known regarding whether the coreceptor has the capacity to inhibit other events, such as Fas ligand (FasL) expression and antigen-induced cell death (AICD). In this study, it is shown that CTLA-4 expressed in a T-cell hybridoma can elicit a...

Similarities in the phenotypes of mice deficient for cytotoxic T lymphocyte antigen-4 (CTLA-4) or transforming growth factor-beta1 (TGF-beta1) and other observations have led to speculation that CTLA-4 mediates its inhibitory effect on T cell activation via costimulation of TGF-beta production. Here, we examine the role of TGF-beta in CTLA-4-mediated inhibition of T cell activation and of CTLA-...

BACKGROUND Cytotoxic T lymphocyte antigen 4 (CTLA-4) is a potent immunoregulatory molecule that suppresses antitumor response by downregulating T cell activation. The most studied +49A>G polymorphism of the CTLA-4 gene has been associated with several autoimmune diseases. However, little is known about the association between this functional polymorphism of CTLA-4 and cancer prognosis. OBJECT...

AIMS To determine whether the functional A49G polymorphism of cytotoxic T-lymphocyte antigen-4 (CTLA-4), a T-cell surface molecule that modulates T-lymphocyte activation and influences the risk of developing alcohol-induced autoantibodies, plays a role in susceptibility to alcoholic liver disease (ALD) and influences disease severity in Italian alcohol abusers. METHODS One hundred and eighty-...