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Related Concept Videos

T Cell Types and Functions01:24

T Cell Types and Functions

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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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Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
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The intestinal epithelial lining rapidly renews every 4 to 5 days. The renewal is facilitated by intestinal stem cells (ISCs) located at the base of the crypt– a gland located at the bottom of each villus. ISCs divide asymmetrically to form new stem cells and progenitor daughter cells. The daughter cells are called transit-amplifying (TA) cells which move upwards along the crypt and either differentiate into absorptive cells– the enterocytes or secretory cells– including the...
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Related Experiment Video

Updated: Jan 10, 2026

Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
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Decoding Peripheral Tolerance: TCR Rules for pTreg differentiation in the Gut.

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    This summary is machine-generated.

    Regulatory T cells (Tregs) differentiate in response to antigens, with Treg-derived T cell receptors (TCRs) being more effective. Different antigens elicit distinct Treg phenotypes, suggesting targeted tolerogenic therapies.

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    Area of Science:

    • Immunology
    • T cell biology
    • Regulatory T cell differentiation

    Background:

    • Peripheral differentiation of regulatory T cells (pTregs) is crucial for immunological tolerance to non-self antigens like food and microbes.
    • The roles of T cell receptor (TCR) recognition versus environmental cues in pTreg differentiation are not well understood.

    Purpose of the Study:

    • To investigate the impact of different antigens and TCR origins on pTreg differentiation.
    • To explore the distinct pTreg phenotypes induced by self, microbial, and dietary antigens.

    Main Methods:

    • Utilized CRISPR-based TCR editing in primary T cells.
    • Performed an in vivo screen of a large TCR panel to assess pTreg differentiation.
    • Analyzed pTreg phenotypes (Helios+, RORγ+) induced by various antigens.

    Main Results:

    • All tested antigen classes (self, microbial, dietary) induced pTreg differentiation.
    • TCRs derived from Tregs were significantly more effective at promoting pTreg differentiation than those from conventional T cells (Tconv).
    • Distinct pTreg phenotypes were observed depending on the antigen class and TCR origin, linked to specific antigen-presenting cells.

    Conclusions:

    • Treg-derived TCRs preferentially drive tolerogenic cell fates, highlighting their potential for therapeutic applications.
    • Understanding antigen-specific pTreg differentiation pathways can inform the development of novel tolerogenic therapies.