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Related Concept Videos

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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Cytotoxic T Cells-mediated Immune Response01:27

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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.
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...
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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.
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Cancer Vaccines01:30

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Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
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Cancer Stem Cells and Tumor Maintenance02:40

Cancer Stem Cells and Tumor Maintenance

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Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
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Targeted Cancer Therapies02:57

Targeted Cancer Therapies

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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
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Related Experiment Video

Updated: Sep 13, 2025

Analysis of Human T Cell Activity in an Allogeneic Co-Culture Setting of Pre-Treated Tumor Cells
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Unconventional T cells in anti-cancer immunity.

Ariel Laub1,2, Nathalia Rodrigues de Almeida1, Shouxiong Huang1,2

  • 1Host-Pathogen Interactions Program, Texas Biomedical Research Program, San Antonio, TX, United States.

Frontiers in Immunology
|August 1, 2025
PubMed
Summary

Unconventional T cells, like MAIT and iNKT cells, respond to metabolites, not peptides, offering new anti-cancer immunotherapy avenues. Their roles in cancer immunity and therapeutic potential are being uncovered.

Keywords:
CD1MHC class I-related protein 1 (MR1)cancerimmunotherapylipidspolar metabolitesunconventional T cells

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Area of Science:

  • Immunology and Cancer Research
  • Focuses on the innate-like immune response mediated by unconventional T cells.

Background:

  • Conventional T cells recognize peptide antigens via MHC molecules.
  • Unconventional T cells detect non-peptidic metabolites presented by MHC class I-like proteins (CD1, MR1).
  • Key unconventional T cell subsets include mucosal-associated invariant T (MAIT), γδ T cells, and invariant natural killer T (iNKT) cells.

Purpose of the Study:

  • To review the current understanding of unconventional T cells in cancer immunity.
  • To explore the roles of MR1- and CD1-restricted T cells in various malignancies.
  • To highlight novel discoveries in MR1 ligand structures and functions.

Main Methods:

  • Review of recent scientific literature on unconventional T cells and cancer.
  • Analysis of findings related to MAIT, iNKT, and γδ T cell responses in different cancer types.
  • Examination of emerging therapeutic strategies involving unconventional T cells.

Main Results:

  • MAIT cells often show an immunosuppressive phenotype in cancers, despite responding to bacterial metabolites.
  • Tumor-derived MR1 ligands and their functions are largely unknown, but self-metabolites can activate MR1-restricted T cells.
  • iNKT and γδ T cells exhibit dual roles, potentially promoting or inhibiting tumor growth.
  • Unconventional T cell activation kinetics differ between solid and hematological cancers.

Conclusions:

  • Unconventional T cells present unique advantages for anti-cancer immunotherapy due to their innate-like responses and MHC-independent recognition.
  • Understanding novel cancer metabolite antigens and MR1/CD1 ligand structures is crucial for therapeutic development.
  • Emerging strategies like CAR-T and TCR-T cells, combined with other treatments, show promise in overcoming tumor-induced immunosuppression.