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This study found that higher serum IL-21 levels may serve as a promising diagnostic and prognostic marker for alopecia areata, strongly correlating with disease activity.

In this study using rabbits, HA2 hydrogels made from cross-linked hyaluronic acid and polysaccharide promoted wound healing better than other treatments, reducing inflammation and scar formation.

This study reports that hyperaesthetic leucotrichia primarily affects Arabian and American paint horses, occurring mainly in summer, with histological differences from erythema multiforme despite some shared features.

In this study, increased Treg cell activity indicated by IL-10 and IL-15 was identified as a feature of ADTA, distinguishing it from AA and potentially explaining ADTA's more favorable prognosis.

In this study, researchers developed hyaluronic acid derivatives functionalized with nitric oxide photodonors for light-activated skin treatments, finding that the compounds released NO under blue light and enhanced keratinocyte proliferation and migration, suggesting potential for therapeutic use.

Alopecia areata is an autoimmune disorder causing hair loss, linked to specific hair follicle antigens and genetic factors.

This review discusses the relationship between allergies and alopecia areata, highlighting potential roles for anti-allergy and desensitization therapies, but reports no new clinical results.

This study found that intralesional vitamin D3 injections significantly increased serum vitamin D3 levels in patients with localized alopecia areata, although baseline vitamin D3 levels did not predict disease severity or treatment response.

This study developed an effective and reliable HPTLC method for the simultaneous measurement of linoleic acid and oleanolic acid in Eclipta alba.

This study found that Chinese patients with alopecia areata, female pattern hair loss, and male androgenetic alopecia had significantly lower serum vitamin D levels than healthy individuals.

This study suggests that oleanolic acid may promote hair growth in mice with testosterone-induced androgenetic alopecia by activating the Wnt/β-catenin pathway and influencing various molecular levels.

This study found that recombinant hepatitis B vaccine may increase the risk of alopecia areata onset in older predisposed mice but larger trials suggest this effect might lie within normal variation.

A specific gene mutation causes sparse, brittle hair in a family.

This study found that CD44 and CD49d together enhance signaling pathways in lymphocytes in mice with alopecia areata, influencing their activation and function.

This study reports that 11β-HSD1 activity in human skin increases with age and photoexposure, potentially contributing to skin aging and the effects of glucocorticoids.

This study found that expressions of TLR-3, TLR-7, TLR-8, and TLR-9 were significantly higher in alopecia areata patients compared to healthy controls, indicating a potential role in disease autoimmunity.

ALDOA levels drop in hair cells during hair loss.

This study found that diphlorethohydroxycarmalol significantly increased prostaglandin $E_2$ synthesis in HaCaT human keratinocytes by upregulating COX-1 and COX-2 expression, suggesting potential benefits from elevated $PGE_2$ production.

The researchers reported that disrupting ATRA signaling by deleting RDHE genes in the hair follicle led to altered hair follicle cycles, composition, and gene expression, indicating RDHEs' role in hair follicle signaling coordination.

This study identified key genetic regions associated with alopecia areata, highlighting both acquired and innate immune involvement, with a novel link to the upregulation of ULBP ligands in autoimmune disease.

In this study, bovine testes hyaluronidase accelerated wound healing in vitro and in vivo by enhancing cellular proliferation, reepithelialization, and modulating inflammation in rat models.

This study found that dysregulation of systemic Th1, Th2, and Th17 cytokines is associated with alopecia areata, with specific cytokines linked to disease activity and treatment response.

This study found that PDLLA filler treatment may help combat age-related hair thinning by reducing oxidative stress and enhancing hair follicle function in both cell and animal models.

In this case-control study, female patients with early onset androgenetic alopecia had higher triglycerides, total cholesterol, and LDL-C levels, and lower HDL-C levels compared to females with other skin diseases.

This review discusses the potential of human placental extract (HPE) in cartilage regenerative medicine for osteoarthritis, noting its significant anti-inflammatory and regenerative properties observed in vitro and in vivo studies, but reports no new clinical results.

This study provides evidence that innate lymphoid cells-type 1 can induce alopecia areata in human hair follicles, challenging the view that it is solely a CD8+ T cell-driven autoimmune disease.

This study identified an association between alopecia areata and the MICA*009 and HLA-B14 genetic markers, highlighting the importance of studying them together to better understand their role in this condition.

In this study, women with polycystic ovary syndrome showed significantly higher levels of DHEA, IL-6, and TNF-α compared to healthy controls, indicating a possible link between these biomarkers and PCOS.

In this study, dihydrotestosterone increased proliferation and decreased IL-6 production in in-vitro fibroblasts from hereditary gingival fibromatosis and normal gingiva, effects partially reversed by anti-androgens.

This review discusses SAHA syndrome in women, characterized by seborrhea, acne, hirsutism, and/or androgenetic alopecia, and notes its similarity to polycystic ovary syndrome without reporting new clinical results.