Related Experiment Video
Updated: Jul 7, 2026
12:12
Methods to Assess Beta Cell Death Mediated by Cytotoxic T Lymphocytes
Published on: June 16, 2011
Concepts of activated T cell death
Dirk Brenner1, Peter H Krammer, Rüdiger Arnold
1Tumor Immunology Program, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany.
Critical Reviews in Oncology/Hematology
|February 22, 2008
Summary
The adaptive immune system eliminates pathogens using T cells, which undergo programmed cell death (AICD or ACAD) to shut down the immune response. This review explores the regulation of T cell death pathways, including cytokines and signaling mediators.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Lymphocytes are key to adaptive immunity, clearing pathogens after activation and proliferation.
- Immune response shutdown involves programmed cell death of activated lymphocytes.
- Two main T cell death pathways exist: activation-induced cell death (AICD) and activated cell autonomous death (ACAD).
Purpose of the Study:
- To discuss the regulatory mechanisms of AICD and ACAD in T cells.
- To review the roles of cytokines, TCR signaling mediators (e.g., HPK1), and the NF-kappaB pathway in T cell death.
- To differentiate between AICD types (death receptor-dependent/independent) and explore caspase-independent T cell death.
Main Methods:
- Literature review and synthesis of existing research on T cell death.
- Discussion of signaling pathways involved in lymphocyte regulation.
- Analysis of cytokine and T cell receptor (TCR) proximal signaling in immune response termination.
Main Results:
- AICD and ACAD are distinct mechanisms for removing activated T cells.
- Cytokines, HPK1, and NF-kappaB signaling critically regulate T cell death.
- T cell death can occur via death receptor ligation or independently, and also independent of caspases.
Conclusions:
- Understanding T cell death regulation is crucial for controlling adaptive immunity.
- Targeting specific signaling pathways may offer therapeutic strategies for immune modulation.
- Further research into caspase-independent death mechanisms is warranted.
More Related Videos
Related Concept Videos
01:27Cytotoxic T Cells-mediated Immune Response
Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
01:30Overview of Cell Death
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
01:22T Cell Activation and Clonal Selection
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
01:18Autophagic Cell Death
Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
01:17The Extrinsic Apoptotic Pathway
The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...