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Related Concept Videos

Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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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.
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Adaptive Mechanisms in Cancer Cells02:53

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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Electron Transport Chain: Complex I and II01:46

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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The Tumor Microenvironment02:17

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Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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T Cell Activation and Clonal Selection01:22

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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.
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Related Experiment Video

Updated: Aug 7, 2025

Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells
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Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells

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Metabolic Challenges in Anticancer CD8 T Cell Functions.

Andrea M Amitrano1,2, Minsoo Kim2

  • 1Department of Pathology, University of Rochester Medical Center, Rochester, NY 14642, USA.

Immune Network
|March 13, 2023
PubMed
Summary
This summary is machine-generated.

Cancer immunotherapies struggle with solid tumors due to the tumor microenvironment (TME). Targeting T-cell mitochondrial metabolism offers a promising strategy to enhance immunotherapy effectiveness against these challenging cancers.

Keywords:
CD8 Positive T lymphocytesChimeric antigen receptor therapyMetabolismMitochondria

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Tailoring In Vivo Cytotoxicity Assays to Study Immunodominance in Tumor-specific CD8+ T Cell Responses
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Area of Science:

  • Immunology
  • Oncology
  • Metabolic research

Background:

  • Cancer immunotherapies are highly effective for blood cancers but face significant challenges in treating solid tumors.
  • The tumor microenvironment (TME) presents metabolic obstacles, limiting the efficacy of T-cells.
  • Tumor-infiltrating CD8+ T cells compete for nutrients, leading to impaired function and exhaustion.

Purpose of the Study:

  • To investigate the role of mitochondria in CD8+ T-cell function within the TME.
  • To explore targeting mitochondrial metabolism as a strategy to overcome immunotherapy resistance in solid tumors.

Main Methods:

  • Analysis of metabolic challenges in the TME affecting T-cells.
  • Review of evidence linking mitochondrial function to T-cell activation, migration, and effector functions.
  • Exploration of therapeutic strategies targeting T-cell mitochondrial metabolism.

Main Results:

  • Solid tumors create a metabolically suppressive TME that hinders T-cell activity.
  • Mitochondria are crucial for CD8+ T-cell activation, migration, effector functions, and persistence.
  • Metabolic reprogramming of T-cells holds potential for improving cancer immunotherapy.

Conclusions:

  • Mitochondrial metabolism is a critical factor in the success or failure of T-cell-based cancer immunotherapies.
  • Targeting the mitochondrial metabolism of adoptively transferred T cells could significantly enhance treatment outcomes for solid malignancies.
  • Further research into T-cell metabolic reprogramming is warranted to improve cancer treatment strategies.