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Related Concept Videos

Antigen Presenting Cells01:22

Antigen Presenting Cells

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The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
T cells require the help of antigen-presenting cells (APCs), which process foreign antigens into smaller fragments that can be recognized by T cells. These APCs are highly specialized cells that efficiently internalize antigens...
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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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T Cell Types and Functions01:24

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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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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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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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Updated: Aug 14, 2025

Generation of Human Alloantigen-specific T Cells from Peripheral Blood
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Generation of Human Alloantigen-specific T Cells from Peripheral Blood

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TPC Functions in the Immune System.

Philip Steiner1, Elisabeth Arlt2, Ingrid Boekhoff2

  • 1Institute of Pharmacology, Faculty of Medicine, Johannes Kepler University Linz, Linz, Austria.

Handbook of Experimental Pharmacology
|January 13, 2023
PubMed
Summary
This summary is machine-generated.

Two-pore channels (TPCs) regulate calcium signaling in immune cells, impacting immune responses. Further research into TPCs could lead to new treatments for inflammatory diseases like anaphylaxis.

Keywords:
EndolysosomesMast cellsTPC1TPC2

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Two-pore channels (TPCs) are intracellular cation channels crucial for physiological and immunological processes.
  • TPCs are located in acidic organelles and regulate calcium homeostasis and signaling in immune cells.

Purpose of the Study:

  • To review the role of TPCs in immune cell function and immune reactions.
  • To highlight TPCs as potential therapeutic targets for inflammatory diseases.

Main Methods:

  • Overview of cellular immune responses and immune cells.
  • Focus on ion channels regulating immune cells, particularly TPCs.
  • Discussion of TPC localization and function in acidic organelles.

Main Results:

  • TPCs regulate Ca2+ homeostasis and signaling in immune cells.
  • TPCs are increasingly recognized for their role in immunology.
  • TPCs show potential as pharmacological targets for pro-inflammatory conditions.

Conclusions:

  • TPCs are vital for immune cell function and calcium signaling.
  • Further investigation of TPCs is needed to develop targeted therapies for inflammatory diseases.
  • Understanding TPC mechanisms may lead to novel treatments for conditions like anaphylaxis.