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A 73-year-old man with purpura and fever.

Eur J Intern Med

January 2025

Dermatology department, Unidade Local de Saúde de Santa Maria, Avenida Professor Egas Moniz MB, Lisboa, Portugal; Universidade de Lisboa Faculdade de Medicina, Dermatology University Clinic, Portugal.

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Impact of Fli1 deletion on B cell populations: A focus on age-associated B cells and transcriptional dynamics.

J Dermatol Sci

December 2024

Department of Dermatology, University of Tokyo Graduate School of Medicine, Tokyo, Japan; Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai, Japan. Electronic address:

Background: Altered Fli1 expression is associated with various autoimmune diseases, yet its impact on B cells remains unexplored.

Objective: This study investigated the direct effects of Fli1 depletion on B cell populations, focusing on age-associated B cells (ABCs).

Methods: Splenocytes of Fli1 BcKO (Cd19-Cre; Fli1) and Cd19-Cre mice were analyzed flow cytometrically.

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Unfolded protein response modulates Tyrosinase levels and melanin production during melanogenesis.

J Dermatol Sci

January 2025

Department of Biochemistry, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan; Department of Frontier Science and Interdisciplinary Research, Faculty of Medicine, Kanazawa University, Ishikawa, Japan. Electronic address:

Background: Melanocytes protect the body from ultraviolet radiation by synthesizing melanin. Tyrosinase, a key enzyme in melanin production, accumulates in the endoplasmic reticulum (ER) during melanin synthesis, potentially causing ER stress. However, regulating ER function for melanin synthesis has been less studied than controlling Tyrosinase activity.

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Many atopic dermatitis (AD) patients have suboptimal responses to Dupilumab therapy. This study identified key genes linked to this resistance using multi-omics approaches to benefit more patients. We selected a prospective cohort of 54 CE treated with Dupilumab from the GEO database.

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