Alopecia Areata(AA)

This study aims to investigate the potential role of the ferroptosis pathway in the pathogenesis and clinical course of Alopecia Areata (AA). Serum concentrations of two key ferroptosis biomarkers-Glutathione Peroxidase 4 (GPX4), a primary antioxidant enzyme protecting against lipid peroxidation, and Malondialdehyde (MDA), a major end-product of lipid membrane damage-will be quantitatively measured using Enzyme-Linked Immunosorbent Assay (ELISA) kits. A total of 156 participants will be enrolled, consisting of 104 patients diagnosed with Alopecia Areata (subdivided into acute and chronic cohorts) and 52 age- and sex-matched healthy controls. Serum biomarker levels will be statistically compared among the groups to determine their diagnostic value. Furthermore, these biomarker levels will be correlated with clinical disease extension evaluated via the Severity of Alopecia Tool (SALT) score and objective trichoscopic activity findings (such as black dots, yellow dots, and exclamation mark hairs). The ultimate goal of this cross-sectional study is to evaluate whether serum GPX4 and MDA can serve as reliable objective biomarkers for monitoring disease severity, staging, and trichoscopic activity in Alopecia Areata management.The ultimate goal of this cross-sectional study is to evaluate whether serum GPX4 and MDA can serve as reliable objective biomarkers for monitoring disease severity, staging, and trichoscopic activity in Alopecia Areata management.

Rationale: Since the introduction of Janus kinase (JAK) inhibitors, there has been a significant advancement in the treatment of pediatric alopecia areata. Eligibility for this treatment, in the Netherlands, requires prior failure of systemic therapies such as cyclosporin or methotrexate. However, the choice between methotrexate and cyclosporin as first-line systemic treatment is not supported by robust comparative studies. Therefore, the investigators conduct a patient preference trial with a long-term follow-up provided in the Pediatric Systemic Alopecia Areata Registry (STA2R-Pediatric). This study will evaluate the effectiveness of Cyclosporin (CsA) and Methotrexate (MTX) in children and adolescents with moderate-to-severe AA. Objective(s): To investigate the effectiveness of CsA and MTX in the treatment of children and adolescents with alopecia areata in routine clinical care. Study type: This is a prospective, patient preference clinical trial with a duration up to 36 weeks in accordance with the routine clinical care guidelines. Study population: This study will include children and adolescents (2-17 years old) diagnosed with AA who start first-line systemic treatment. Methods: Patients and their parents will choose between CsA and MTX treatment as in routine clinical care, receiving follow-up in accordance with standard clinical practices. The participants will not be randomized. The primary endpoint is the measurement of the Severity of Alopecia Tool (SALT) at 9-months with a secondary endpoint at 24 weeks. SALT scores will be measured by a blinded assessor. The (Children) - Dermatology Life Quality Index ((C)-DLQI) questionnaire will be conducted at each visit (0, 3, 6, 9 months), allowing evaluation of the impact on patients' quality of life.

This is a Phase 1, open-label, multi-center, competitive enrollment, and dose-escalation study of HCW9302 in subjects with Alopecia Areata (AA)