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Hair follicle dermal stem cells help control hair growth timing by regulating signals at the hair germ–dermal papilla interface.

This review discusses the role of stem cell progeny as integral components of stem cell niches, offering feedback that may influence different stem cell systems' microenvironments, but it presents no new research findings.

This study found that chronic eczema supports the expansion of myeloid suppressor cells, which contribute to silencing autoreactive T cells and partially promote hair regrowth in alopecia areata.

This study presents a new mouse model for investigating chronic graft-versus-host disease, highlighting the role of human thymic tissue in developing multiorgan fibrosis driven by human immune cells.

This study found that MDSC exosomes promoted partial hair regrowth and modulated immune responses in mice with alopecia areata, suggesting potential as a treatment for autoimmune diseases.

This study found that deleting Stim1 and Stim2 in mature T regulatory cells disrupts Ca 2+ signaling, preventing their differentiation and leading to severe autoimmune disorders in mice.

In this study using a mouse model and human data, researchers found that CD8+ T cells are central to driving alopecia areata, while regulatory T cells offer some protection, highlighting CD8+ T cells as key targets for future therapy development.

This review discusses how inflammation influences hair follicle stem cell activities like wound healing and follicle cycling and suggests a potential link between inflammation, stem cell activation, and programmed cell death.

This study found that intracellular Toll-like receptors were significantly up-regulated in peripheral blood mononuclear cells of alopecia areata patients, suggesting a potential role in inflammatory signaling and pathogenesis.

This study found that deleting specific super-enhancer regions in mice affects CD25 expression in a cell type-specific manner, leading to autoimmune alopecia in some cases and revealing distinct regulatory mechanisms for constitutive and inducible expression of CD25.

This review discusses the interactions between immune cells and the skin epithelium and their impact on maintaining barrier function, emphasizing the potential to enhance epithelial barrier function in inflammatory diseases.

In this study, hair follicle-derived mesenchymal stromal cells showed potential for immunomodulation, with equivalent or superior responses compared to those from adipose tissue, suggesting a promising alternative cell source.

This study found that combining adipose-derived mesenchymal stromal cells with meglumine antimoniate reduced lesion size and parasite load in mice with leishmaniasis, suggesting potential for improved treatment.

In this study, Luan et al. showed that epidermal stem cells play a key role in wound healing by coordinating the recruitment of regulatory T cells and neutrophils, which help balance immune tolerance and inflammation.

This study developed immortalized human hair follicle-derived mesenchymal-like stromal cells (iHF-MSCs) as a consistent source of therapeutic secretome, reporting their superior immunomodulatory and regenerative performance, potentially advancing cell-free therapies for inflammation and tissue repair.

This review summarizes recent findings about the multi-site differentiation of tissue regulatory T cells, emphasizing the pivotal role of epigenetic remodeling, but it reports no new clinical results.

This study found that patients with alopecia areata have lower levels of sCD83, a protein which, when supplemented in a mouse model, reversed disease symptoms and supported regulatory T cell proliferation, possibly by interacting with IDO activity.

In this study, pre-treatment with 5-α-reductase inhibitors (finasteride/dutasteride) in patients with metastatic renal cell carcinoma was associated with better immune checkpoint inhibitor effectiveness and improved progression-free and overall survival, without increasing severe side effects.

This study suggests that using cell-free dexamethasone-primed stem cell media may offer a promising alternative treatment for systemic lupus erythematosus, showing immunomodulatory benefits and therapeutic efficacy in reducing various complications.

This review discusses how regulatory T cells, known for their immunosuppressive role, also produce repair mediators critical for tissue repair and regeneration, acting on non-immune cells in tissue-specific contexts, and highlights areas for future research in tissue repair, fibrosis, and cancer.

In this review, researchers conclude that immune imbalance between regulatory and cytotoxic T cells, along with activation of IFN-γ–MHC and IL-15–NK pathways, disrupts hair follicle immune privilege, suggesting pivotal mechanisms in alopecia areata development and potential targets for immunotherapeutic interventions.

In this study, researchers identified a causal link between Epstein-Barr virus infection and clear cell renal cell carcinoma, highlighting GBP1 as a key target and suggesting finasteride as a potential inhibitor, offering a new direction for treatment strategies.

This study found that injecting mouse hair follicle-derived mesenchymal stem cells (moMSCORS) into C57BL/6 mice reduced the incidence and severity of type 1 diabetes by modulating immune responses, suggesting potential for therapeutic use due to their immunosuppressive effects.

This review explores the current and experimental therapies for chronic wounds, emphasizing the potential of cellular and immunotherapies in addressing these persistent conditions, but notes a shortage of comprehensive studies on their effectiveness.

In this study, researchers observed that follicular damage and stem cell loss in frontal fibrosing alopecia may be mediated by immune attacks at the bulge region, suggesting potential for JAK/STAT-targeting treatments to prevent progression.

This study found that B cells have dual roles in tumor immunity, with regulatory B cells potentially hindering immune responses against tumors in the melanoma mouse model.

In this study, researchers investigated a regulatory network in cashmere goat embryos and found that fibroblast growth factor 10, alongside non-coding RNAs, significantly influences hair follicle cell proliferation, offering insights into the biology of hair follicles in cashmere goats.

This paper reviews signaling influences and niches of epidermal stem cells and compares various types, but does not present new experimental findings.

This chapter reviews the biology and regulatory mechanisms of epidermal stem cells, emphasizing their heterogeneity and roles in skin homeostasis, cancer, and aging, without reporting new findings.

In this review, the authors discuss the potential for cell therapy, such as hematopoietic stem cell transplantation and mesenchymal stromal cells, to treat severe psoriasis unresponsive to biological therapies, while highlighting the associated risks, costs, and regulatory challenges.