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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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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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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
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Retroviral Transduction of Helper T Cells as a Genetic Approach to Study Mechanisms Controlling their Differentiation and Function
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Mechanotransduction in T Cell Development, Differentiation and Function.

Muaz Rushdi1,2, Kaitao Li1,2, Zhou Yuan2,3

  • 1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.

Cells
|February 9, 2020
PubMed
Summary
This summary is machine-generated.

T cells utilize mechanotransduction to convert environmental mechanical forces into biochemical signals, crucial for their function in adaptive immunity. Understanding T cell mechanoimmunology offers a comprehensive view of immune cell development and response.

Keywords:
T cell antigen receptorcatch bondforcelymphocytesstiffnessthymocytes

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Area of Science:

  • Immunology
  • Cell Biology
  • Biophysics

Background:

  • Cells interact with their environment through biochemical and biophysical cues.
  • Mechanotransduction is the process of converting mechanical stimuli into cellular biochemical signals.
  • T cells rely on mechanotransduction for development, differentiation, and function in adaptive immunity.

Purpose of the Study:

  • To review the emerging field of T cell mechanoimmunology.
  • To explore how T cells sense, respond to, and adapt to mechanical cues.
  • To highlight the impact of mechanical forces on T cell functions throughout their life cycle.

Main Methods:

  • Review of existing studies on T cell mechanobiology.
  • Analysis of how mechanical forces affect T cell surface molecules and signaling pathways.
  • Examination of T cell interactions with varying matrix stiffness and mechanical stimuli.

Main Results:

  • Mechanical forces modulate T cell receptor-ligand interactions.
  • Matrix stiffness and force influence protein conformational changes and signal transduction.
  • Mechanotransduction is critical for antigen discrimination and targeted cell killing by T cells.

Conclusions:

  • Mechanical cues significantly impact T cell development, differentiation, and function.
  • Integrating mechanical considerations provides a more holistic understanding of T cell immunology.
  • T cell mechanoimmunology is essential for comprehending adaptive immune responses.