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Th1-Adapted Regulatory T Cells in Tumor Immunity and Inflammatory Diseases
Ayumi Kuratani1,2, Masaaki Okamoto3, Takashi Kobayashi3,4
1Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan.
International Immunology
|July 14, 2026
Summary
Regulatory T cells (Tregs) are not static; they specialize into Th1-Tregs to control type 1 immunity. These adaptable cells play dual roles in cancer and autoimmune diseases.
Area of Science:
- Immunology
- Cellular and Molecular Immunology
- Immune Regulation
Background:
- Regulatory T cells (Tregs) are crucial for immune tolerance and inflammation control.
- Evidence shows Tregs are heterogeneous and adapt to local inflammatory environments.
- Th1-type Tregs (Th1-Tregs), expressing Foxp3 and T-bet, are key regulators of type 1 immune responses.
Purpose of the Study:
- To review the molecular mechanisms of Th1-Treg differentiation.
- To discuss the context-dependent roles of Th1-Tregs in various diseases.
- To highlight the adaptability of Tregs in modulating immune responses.
Main Methods:
- Review of recent scientific literature on Th1-Tregs.
- Analysis of molecular pathways governing Th1-Treg specialization.
- Examination of Th1-Treg function in different pathological contexts (cancer, autoimmunity, infection).
Main Results:
- Th1-Tregs express CXCR3, localizing them to IFN-γ-rich sites.
- In tumors, Th1-Tregs suppress anti-tumor immunity, promoting immune evasion.
- In autoimmune diseases and infections, Th1-Tregs limit excessive inflammation, protecting tissues.
Conclusions:
- Regulatory T cells dynamically adapt to inflammatory environments, specializing into subsets like Th1-Tregs.
- Th1-Tregs exhibit context-dependent functions, suppressing immunity in cancer but protecting hosts in autoimmunity and infection.
- Understanding Th1-Treg specialization is key to developing targeted immunotherapies.
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