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This study describes how arrector pili muscles form a single muscular structure shared by all hair follicles within a follicular unit at the isthmus level in scalp skin.

This study observed a rare case of alopecia areata with granulomatous inflammation, successfully treated with intralesional triamcinolone, leading to complete hair regrowth within two months, highlighting the need for careful diagnosis to distinguish it from other granulomatous alopecias.

This study describes alopecia areata as a long-term, immune-mediated disorder characterized by non-scarring hair loss, often occurring in genetically predisposed individuals and possibly triggered by T-cell-mediated inflammation, environmental stressors, and genetic factors.

This study explains that alopecia areata, a long-term immune-mediated disorder causing patchy baldness, results from an immunological attack on hair follicles, often in genetically predisposed individuals, with a complex mix of immunological, environmental, and genetic factors involved in its development.

In this research, the authors describe alopecia areata as a long-term, immune-mediated disorder that causes non-scarring hair loss due to an immunological attack on hair follicles, often occurring in genetically predisposed individuals and manifesting in childhood or early adulthood.

This abstract explains that alopecia areata is an immune-mediated condition causing non-scarring hair loss, typically in genetically predisposed individuals, with its etiology linked to immune dysregulation, environmental stressors, and genetic factors.

This source describes alopecia areata as a long-term, immune-mediated disorder causing non-scarring hair loss, often starting in childhood or early adulthood due to genetic predisposition and an immunological attack on hair follicles.

This study reported that CXCL12 may have a dual role in alopecia areata, where decreased levels could impair angiogenesis and disrupt vascular support to hair follicles, while its overexpression might exacerbate autoimmune attacks on hair follicles, contributing to hair loss.

This research explored the pathogenesis of alopecia areata, finding that disrupted immune tolerance and gut microbiota are significant contributors, and highlighted the need for innovative treatments that restore immune tolerance and modulate gut microbiota to improve patient outcomes.

TGF-β is found in hair follicles and may cause hair loss in alopecia areata.

This review discusses androgenetic alopecia and reports no clinical findings; the authors highlight a need for further research.

This chapter reviews laboratory models used for studying alopecia therapies but provides no new experimental findings.

Hair loss treatment caused more hair loss in a man.

This paper identifies challenges in diagnosing alopecia variants, emphasizing the importance of pathologists understanding hair follicle histology, biopsy types, and collaborating with dermatologists to improve diagnostic accuracy.

In this study, a mouse model of scarring alopecia demonstrated significantly reduced CD200R expression in affected skin, which may contribute to immune attacks on hair follicles.

This article discusses the biology of cosmetic aging and the chemical pathways involved, emphasizing research advancements that aid clinicians in rejuvenating skin and increasing scalp hair density, but it provides no new results.

Nephronectin helps attach muscle cells to hair follicles.

This study found that in mice, perforin-mediated cytolysis by CD8 T cells is not necessary for the autoimmune attack on hair follicles in alopecia areata, suggesting other mechanisms are responsible for disease progression.

This study found that mechanical and chemical interactions in skin organoids are crucial for initiating mesenchymal-epithelial interactions necessary for hair follicle regeneration.

This review discusses the potential influence of gut microbiota on alopecia areata and suggests fecal microbial transplantation as a possible therapeutic approach but reports no new results.

Alopecia Areata is an autoimmune condition causing hair loss with no cure and treatments that often don't work well.

This article proposes that alopecia areata may be caused by immune attacks on hair follicles after an immune privilege collapse, suggesting new therapeutic approaches targeting this immune response pattern.

This study reports that structural abnormalities in the inner root sheath of hair follicles may cause the hair shaft to be loosely attached in patients with loose anagen hair syndrome.

CD8+ T cells attack hair follicle stem cells, causing scarring and hair loss in Discoid Lupus.

This study found that fibronectin-attached cell sheets significantly improved wound healing in vivo by increasing wound closure rates, reducing inflammation, and promoting tissue regeneration compared to conventional cell sheets.

This study suggests that diffuse alopecia areata initially involves an intense inflammatory attack during the anagen phase, progressing through different hair cycle stages with specific shedding patterns.

Lichen Planopilaris causes irreversible hair loss due to immune attacks on hair stem cells, but modulating PPAR-γ might help treat it.

This study concluded that a polarized-light handheld dermatoscope attached to a digital camera is a practical and useful tool for diagnosing different types of alopecia.

In this study, researchers found that quiescent stem cells resist immune attack due to downregulated antigen presentation, which may help explain the immune evasion of early cancer-initiating cells.

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.