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This review discusses advances in understanding mammalian stem cell niches, particularly in bone marrow, tooth, and hair follicle, and highlights the potential for developing therapies targeting these niches for tissue repair.

This study demonstrates the potential of using bioengineered follicles from adult tissue-derived stem cells for fully functional hair regeneration, illustrating possible applications in organ replacement therapy.

This review discusses how macro-environmental factors such as intradermal adipose tissue and sex hormones influence hair and feather stem cell niches, suggesting environmental targets for regenerative medicine, but reports no new clinical results.

In this study, patients receiving adipose-derived stromal vascular cell transplantation for alopecia areata experienced significant hair regeneration, increased growth, and improved hair quality after 3 and 6 months, indicating potential efficacy of this stem cell-based therapy for hair loss.

This study found that a single injection of platelet-rich stroma significantly increased hair density in men with androgenetic alopecia within 6 to 12 weeks, with no reported side effects.

This article discusses the potential benefits of platelet-rich plasma injections in ovarian tissue to improve reproductive outcomes in IVF for older individuals and proposes a mechanism to enhance embryo ploidy rescue, but reports no new clinical results.

This review discusses the latest understanding of androgenetic alopecia, including stem cell niches in hair follicles, and highlights emerging treatments like growth factors and platelet-rich plasma without new clinical findings.

This study found that combining stromal vascular fraction with PRP injections significantly improved hair density and reduced hair loss more effectively than PRP alone in patients with androgenetic alopecia.

This study revealed that in androgenic alopecia, the proximal attachment of the arrector pili muscle to the hair follicle is often lost or significantly reduced.

In this study using a mouse model, ECM/SVF-CM, derived from adipose-derived stem cells, was observed to stimulate hair growth more effectively than SVF-CM by promoting cell proliferation, neovascularization, and anagen induction, which may support its potential as an improved treatment for hair loss.

This study reviewed the prospects and challenges of using stem cells from adipose tissue in regenerative medicine for facial rejuvenation, emphasizing the need for further research to ensure patient safety before these methods can become routine in cosmetic and reconstructive surgery.

The document concludes that stem cells and their environments are crucial for skin and hair health and have potential for medical treatments.

In this study, researchers suggest that hair follicle miniaturization in conditions like androgenetic alopecia may result from impaired conversion of quiescent stem cells to progenitor cells, influenced by the follicular niche, its collagen network, and various mechanical constraints.

This article reviews the evolving understanding of hematopoietic stem cells, including their heterogeneity and the role of cytokines in lineage determination, and reports no new results.

This study found that intradermal adipocyte lineage cells in mice are necessary and sufficient to activate follicular stem cells, highlighting their role in regulating skin stem cell activity.

This review covers the potential of SVF and ADSC therapies in regenerative medicine and highlights the challenges of regulation and efficacy, without reporting new clinical results.

This review examines the diversity and role of stem cells in the adult dermis, noting a lack of precise understanding about their hierarchy and relationship to dermal fibroblast subpopulations, and reports no new results.

This study found that Shh from neurons signals to Gli1-expressing cells in the hair follicle, cultivating a niche where these bulge cells can potentially transform into epidermal stem cells in wound healing.

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 sympathetic nerves and arrector pili muscles form a niche that modulates hair follicle stem cell activity, revealing their role in hair follicle regeneration.

This review examines the evolving understanding of lymphatic vessel development, emphasizing new cellular mechanisms and lineage diversity, while discussing experimental methods and identifying key knowledge gaps.

This study found that neural stem cell extract enhanced hair growth in mice and cells by stimulating hair follicle niches and activating signaling pathways like TGF-β and BMP.

This review explores the novel roles of white adipose tissue in tissue homeostasis and regeneration, emphasizing its impact on epithelial, muscle, and immune tissues, and reports no new clinical results.

This study found that prostaglandin D2 reduced proliferation in bulge resident K15+ stem cells but not in other K15+ progenitor cells, suggesting differential impacts on hair follicle stem cell niches.

In this study, CD34-positive progenitor cells in irradiated salivary glands were observed to potentially aid in blood vessel formation and remodeling, suggesting their role in tissue healing after radiotherapy.

In this study, high expression of S100A4 in glioblastoma was associated with worse patient survival and promoted tumor progression by enhancing pro-tumorigenic vascular functions.

Different types of stem cells and their environments are key to skin repair and maintenance.

This review discusses lung regeneration and highlights the role of facultative stem/progenitor cells, but it reports no new findings and calls for further exploration of underlying mechanisms.

In this study, D-OCT imaging revealed distinct structural and vascular changes in patients with frontal fibrosing alopecia, highlighting the technique's potential for diagnosing and monitoring the condition's activity.

In this pilot study, combined platelet-rich plasma therapies showed potential benefits for improving skin elasticity and vascular network density in morphea patients, but the small sample size limits definitive conclusions.