Psoriatic and control human hair follicle keratinocytes were cultured on bovine eye lens capsules in Epicult dishes for a period of 5-6 weeks and examined using light microscopy. The following morphological differences between cultures were observed: 1. The lower cell layers contained predominantly flattened cells in psoriatic cultures instead of roundish in control cultures. 2. The differentiation pattern was irregular in psoriatic cultures instead of regular in control cultures. 3. The differentiated zone of psoriatic cultures was more compact and thicker in comparison to normal cultures. These differences might allow discrimination between normal and psoriatic cultures.
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Acta Histochem
January 2025
Shanxi Key Laboratory of Stem Cell for Immunological Dermatosis, Institute of Dermatology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, Shanxi, China. Electronic address:
Objective: Psoriasis is a chronic inflammatory skin disease characterized by excessive proliferation and abnormal differentiation of keratinocytes. Although stem cell-based therapies have shown promise in treating psoriasis, the underlying mechanisms remain unclear. This study aimed to established a psoriatic cell model to investigate the effect of normal dermal mesenchymal stem cell (DMSCs) on keratinocyte proliferation, inflammation responses and the associated mechanism.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Unit of Dermatology, University of Campania Luigi Vanvitelli, 80138 Naples, Italy.
Psoriasis and obesity, while distinct, are inter-related inflammatory conditions. Adipose tissue (AT)-derived mediators could be pathogenically active in triggering and/or amplifying psoriatic skin inflammation and, vice versa, skin inflammation could drive increased adiposity that triggers the development of several chronic conditions. Gaining insight into their intricate relationship could be essential for effective management and treatment.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Department of Medical Biology and Genetics, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland.
Antigen presentation plays a critical role in the pathogenesis of immune-mediated disorders. This study aimed to investigate the effects of IFN-γ and a cytokine mix (5MIX: IL-1α, IL-17A, IL-22, OsM, and TNF-α) on the antigen-presenting capabilities of keratinocytes, with a specific focus on immune-mediated dermatological conditions such as psoriasis (Ps). To achieve this, keratinocytes were treated with IFN-γ and 5MIX, and their impact on the expression of key antigen-presentation molecules, HLA-DRα and CD74, was assessed.
View Article and Find Full Text PDFFront Immunol
December 2024
Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy.
Background: The phosphodiesterase 4 (PDE4) inhibitor apremilast downregulates the production of IL-23 and other pro-inflammatory cytokines involved in the pathogenesis of psoriatic arthritis (PsA).
Aim: To investigate the effects of apremilast on the production of cytokines by peripheral blood monocyte-derived macrophages, innate-like lymphocyte cells (ILCs), mucosal-associated invariant T (MAIT) cells, γδ T cells, natural killer (NK) cells, and NKT-like cells from patients with PsA manifesting different clinical responses to the treatment.
Methods: Peripheral blood samples were obtained from patients with PsA at baseline and after 1 and 4 months of apremilast therapy (n = 23) and 20 controls with osteoarthritis.
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