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Glossary Regulatory T Cells

specialized immune cells that prevent autoimmune responses

Regulatory T Cells, often abbreviated as Tregs, are a specialized subset of T cells in the immune system that help maintain immune tolerance and prevent autoimmune diseases. They function by suppressing the activity of other immune cells, thereby preventing excessive or misdirected immune responses that could damage the body's own tissues.

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Research

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Alopecia Areata Patients Show Deficiency of FOXP3+CD39+ T Regulatory Cells and Clonotypic Restriction of Treg TCRβ-Chain, Highlighting the Immunopathological Aspect of the Disease

research Alopecia areata patients show deficiency of FOXP3+CD39+ T regulatory cells and clonotypic restriction of Treg TCRβ-chain, which highlights the immunopathological aspect of the disease

30 citations , July 2019 in “PloS one”

This study found that T-regulatory cells, specifically the FOXP3 CD39 subset, were significantly reduced in both circulation and hair follicles of alopecia areata patients compared to healthy subjects, suggesting potential therapeutic targets.

research Low-Dose IL-2 for Treating Moderate to Severe Alopecia Areata: A 52-Week Multicenter Prospective Placebo-Controlled Study Assessing its Impact on T Regulatory Cell and NK Cell Populations

22 citations , September 2020 in “The journal of investigative dermatology/Journal of investigative dermatology”

This review highlights the possible role of T regulatory cells in the immune-related mechanisms of alopecia areata but reports no new clinical findings.

research A humanized IL-2 fusion protein enhances T regulatory cells in vivo and restrains disease in a murine model of Alopecia Areata 4760

November 2025 in “The Journal of Immunology”

In a murine model of alopecia areata, this study observed that the IL-2 fusion protein HCW9302 helped prevent disease development by expanding regulatory T cells and reducing disease-causing effector T cell infiltrates, suggesting potential for using IL-2 fusion proteins in alopecia areata treatment.

research The imbalance between Type 17 T-cells and regulatory immune cell subsets in psoriasis vulgaris

49 citations , August 2022 in “Frontiers in Immunology”

This paper discusses the evolving understanding of psoriasis pathogenesis with no new clinical findings; the authors highlight the role of T-cell plasticity and regulatory cells, calling for further clinical applications using single-cell technologies.

research HuR ablation destabilizes Foxp3 mRNA and impairs regulatory T cell function, contributing to an autoimmune phenotype

1 citations , September 2025 in “Frontiers in Immunology”

In this study, researchers using a Treg-specific HuR-deficient mouse model found that the RNA-binding protein HuR is crucial for stabilizing Foxp3 mRNA, affecting Treg function and immune regulation, with HuR disruption leading to impaired Foxp3 expression and potential autoimmune dysfunction.

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community HairClone (UK) finally begins offering its Dermal Papilla Cell Hair Multiplication procedure to humans. In Guatemala.

149 upvotes 6 months ago

HairClone is offering a Dermal Papilla Cell Hair Multiplication procedure in Guatemala, raising questions about its effectiveness and regulatory reasons for the location. Users express skepticism and curiosity about the treatment's success and potential costs.

community Mallia Aesthetics achieves key regulatory steps for novel sCD83-derived ingredient for hair growth

24 upvotes 1 year ago

Mallia Aesthetics has developed MAL-838, a hormone-free product derived from sCD83, which stimulates hair growth without disrupting the skin microbiome. sCD83 promotes hair growth by activating hair follicles and preventing cell death, offering a localized treatment without systemic side effects.

community Good news for stem cells hair therapies - US federal judge: using patients' stem cells does NOT fall under FDA jurisdiction

26 upvotes 4 years ago

A US federal judge ruled that using patients' stem cells for medical treatments is not under FDA jurisdiction, potentially speeding up development of stem cell-based hair loss therapies. Some users are optimistic about increased research and development, while others express skepticism about the ruling's impact on safety and efficacy standards.

community Wouldn’t it be funny if there already was a drug that existed which reactivated sleeping follicles? It would be our own version of Ozempic

202 upvotes 1 year ago

PP405 shows promise for reactivating hair follicles, with potential maintenance using 5AR inhibitors. Current treatments like Minoxidil and finasteride are effective but have limitations, and there is hope for more effective solutions in the future.

community Researchers working on ways to regenerate lost hair from stem cells identified a recipe for normal hair regeneration in the lab. “A method for cyclical regeneration of hair follicles from hair follicle stem cells and will help make hair follicle regeneration therapy a reality in the near future.”

263 upvotes 5 years ago

Hair loss treatments like finasteride, minoxidil, and hair transplants have side effects and limitations. There is hope for future advancements in stem cell therapy and hair follicle regeneration, though skepticism about their effectiveness and timeline persists.

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Is a hair transplant in Turkey safe? Clinics in Turkey describe their own work as safe when it is done in a licensed clinic by an experienced surgeon, and they also agree that quality varies a lot between clinics. All of that comes from the clinics themselves rather than from independent regulator or complication data, so any judgement rests on the specific clinic and surgeon, not on the country.

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