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Related Concept Videos

T Cell Types and Functions01:24

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Peptides Derived from α-Tubulin Induce Functional T Regulatory Cells.

Tara Fiyouzi1,2, Jose L Subiza2, Esther M Lafuente1

  • 1Department of Immunology, Ophthalmology and ENT, Faculty of Medicine, Complutense University of Madrid, Pza Ramon y Cajal s/n, 28040 Madrid, Spain.

International Journal of Molecular Sciences
|September 13, 2025
PubMed
Summary

Researchers identified immune-regulatory epitopes in alpha-tubulin. These epitopes enhance regulatory T (Treg) cells and suppress immune responses, offering potential for new autoimmune disease treatments.

Keywords:
epitopeimmunosuppressionpeptideregulatory T cellα-tubulin

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Area of Science:

  • Immunology
  • Molecular Biology
  • Autoimmunity

Background:

  • Regulatory T (Treg) cells are crucial for immune homeostasis and preventing self-reactivity.
  • Identifying novel sources of Treg cell epitopes is key to developing immunomodulatory therapies.

Purpose of the Study:

  • To identify and characterize Treg cell epitopes within human alpha-tubulin.
  • To evaluate the immunomodulatory potential of these alpha-tubulin epitopes in vitro and in vivo.

Main Methods:

  • Human peripheral blood mononuclear cells were used to identify Treg cell epitopes.
  • Peptide pools containing identified epitopes (αTBL pool) were tested for T cell suppression.
  • Differentiation of naive CD4+ T cells was induced with the αTBL pool and dendritic cells.
  • Mouse splenocytes were used to assess cross-species epitope activity.

Main Results:

  • Identified human alpha-tubulin epitopes enhanced IL-10-producing Foxp3+ Treg cells and Tr1 cells in vitro.
  • The αTBL pool suppressed T cell responses to HLA class I- and class II-restricted epitopes.
  • αTBL pool promoted the differentiation of functional Foxp3+ Treg cells that inhibited T cell proliferation.
  • A conserved epitope stimulated Foxp3+ Treg cells in mouse splenocytes.

Conclusions:

  • Alpha-tubulin contains Treg cell epitopes that can broadly regulate immune responses.
  • These epitopes may serve as a basis for novel therapeutic strategies for immune-mediated diseases.