Search results for "gamma delta"

Immunotherapy targeting colon cancer stem cells

2010

In the last 10 years, cancer stem cells have interested the scientific community because this small tumorigenic population is also associated with tumor progression in human patients and specific targeting of cancer stem cells could be a strategy to eradicate cancers currently resistant to conventional therapy. Clinical studies have recently demonstrated that adding immune therapy to chemotherapy has survival benefits in comparison with chemotherapy alone that can sensitize tumors to immune cell-mediated killing (e.g., increasing sensitivity of tumor cells to subsequent cytotoxicity by T cells via upregulation of death receptors DR5 and Fas). However, loss of MHC molecules is often observe…

The expanding universe of gamma delta T lymphocytes: subsets, generation and function

2008

Differentiation, phenotype, and function of interleukin-17-producing human V{gamma}9V{delta}2 T cells

2011

V gamma 9V delta 2 T lymphocytes efficiently recognize and kill zoledronate-sensitized, imatinib-sensitive, and imatinib-resistant chronic myelogenou…

2010

Abstract Imatinib mesylate (imatinib), a competitive inhibitor of the BCR-ABL tyrosine kinase, is highly effective against chronic myelogenous leukemia (CML) cells. However, because 20–30% of patients affected by CML display either primary or secondary resistance to imatinib, intentional activation of Vγ9Vδ2 T cells by phosphoantigens or by agents that cause their accumulation within cells, such as zoledronate, may represent a promising strategy for the design of a novel and highly innovative immunotherapy capable to overcome imatinib resistance. In this study, we show that Vγ9Vδ2 T lymphocytes recognize, trogocytose, and efficiently kill imatinib-sensitive and -resistant CML cell lines pre…

gammadelta T Cell Modulation in Anticancer Treatment

2010

The broad antimicrobial and antitumoral reactivity of Vgamma9Vdelta2 T cells, their ability to produce inflammatory cytokines involved in protective immunity against intracellular pathogens and tumors and their strong cytolytic and bactericidal activities suggest their direct involvement in immune control of cancers and infections. gammadelta T cells can be selectively activated by naturally occurring or synthetic phosphoantigens, and drugs that enhance their accumulation into stressed cells, offering new avenues for the development of gammadelta T cell-based immunotherapies. The recent development of small drugs selectively activating Vgamma9Vdelta2 T lymphocytes, which upregulate endogeno…

Editorial: Understanding Gamma Delta T Cell Multifunctionality - Towards Immunotherapeutic Applications.

2020

Introduction: gd T cells have been characterized by the expression of a gd T cell receptor (TCR).When the gd TCR and the corresponding ab TCR were first discovered it was assumed that the corresponding cell types were likely to be functionally very similar. However, some 30 years later, we have realized that they are not. Unlike ab T cells, gd T cells (i) sense target antigens independent of MHC molecules; (ii) display NK-cell like innate reactivities, including killing of infected cells as well as microbes; (iii) are able to take up large particulates, including bacteria, and (iv) can act as professional antigen presenting cells. The “stress sensing” abilities of gd T cells have led to a g…

Tumor-Infiltrating γδ T Lymphocytes: Pathogenic Role, Clinical Significance, and Differential Programing in the Tumor Microenvironment.

2014

There is increasing clinical evidence indicating that the immune system may either promote or inhibit tumor progression. Several studies have demonstrated that tumors undergoing remission are largely infiltrated by T lymphocytes [tumor-infiltrating lymphocytes (TILs)], but on the other hand, several studies have shown that tumors may be infiltrated by TILs endowed with suppressive features, suggesting that TILs are rather associated with tumor progression and unfavorable prognosis. γδ T lymphocytes are an important component of TILs that may contribute to tumor immunosurveillance, as also suggested by promising reports from several small phase-I clinical trials. Typically, γδ T lymphocytes …

γδ T Cells Cross-Link Innate and Adaptive Immunity in Mycobacterium tuberculosis Infection

2011

Protective immunity against mycobacterial infections such asMycobacterium tuberculosisis mediated by interactions between specific T cells and activated antigen presenting cells. To date, many aspects of mycobacterial immunity have shown that innate cells could be the key elements that substantially may influence the subsequent adaptive host response. During the early phases of infection, innate lymphocyte subsets play a pivotal role in this context. Here we summarize the findings of recent investigations onγδT lymphocytes and their role in tuberculosis immunity.

Estados funcionales de los linfocitos Tgamma delta en sangre periférica en pacientes con cáncer de colon

2021

Estados funcionales de los linfocitos Tgamma delta en sangre periférica en pacientes con cáncer de colon ANTECEDENTES: El cáncer de colon es uno de los tumores más frecuentes y que más mortalidad causa a nivel mundial. Sabemos que el sistema inmune (SI) es uno de los principales reguladores en el desarrollo de las neoplasias y la capacidad de memoria de los linfocitos T es considerada crítica en la respuesta duradera frente al cáncer. Los linfocitos Tgamma delta son unos componentes singulares del SI que presentan amplia plasticidad fenotípica y funcional con respecto a los tumores pero, por el momento, se desconoce el papel que los Tgamma delta memoria juegan frente al cáncer. HIPÓTESIS: L…