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Objective: To investigate the changes in the m6A methylation modification profile of human periodontal ligament cells (hPDLCs) in response to inflammatory conditions.
Background: Periodontitis is an infectious disease of the periodontal support tissue that leads to the loss of alveolar bone. HPDLCs are primary cells that can repair periodontal tissue defects caused by periodontitis. However, the inflammatory conditions induce inflammatory damage and decrease ossification of hPDLCs. This inflammatory response depends on genetic and epigenetic mechanisms, including m6A methylation.
Methods: HPDLCs were cultured with osteogenic induction medium (NC group), while TNF-α (10 ng/mL) and IL-1β (5 ng/mL) were added to simulate inflammatory conditions (Inflam group). Then RNA-seq and MeRIP-seq analyses were performed to identify m6A methylation modification in the transcriptome range of hPDLCs.
Results: The results showed that the osteogenic differentiation of hPDLCs was inhibited under inflammatory conditions. RNA-seq analysis also revealed that the decreased genes in response to inflammatory conditions were primarily annotated in processes associated with ossification. Compared with the NC group, differentially m6A-methylated genes were primarily enriched in histone modification processes. Among 145 histone modification genes, 25 genes have been reported to be involved in the regulation of osteogenic differentiation, and they include KAT6B, EP300, BMI1, and KDMs (KDM1A, KDM2A, KDM3A, KDM4B, and KDM5A).
Conclusion: This study demonstrated that the m6A landscape of hPDLCs was changed in response to inflammation. M6A methylation differences among histone modification genes may act on the osteogenic differentiation of hPDLCs.
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http://dx.doi.org/10.1111/jre.13105 | DOI Listing |
J Clin Invest
September 2025
The University of Texas at Austin, Austin, United States of America.
Background: Following SARS-CoV-2 infection, ~10-35% of COVID-19 patients experience long COVID (LC), in which debilitating symptoms persist for at least three months. Elucidating biologic underpinnings of LC could identify therapeutic opportunities.
Methods: We utilized machine learning methods on biologic analytes provided over 12-months after hospital discharge from >500 COVID-19 patients in the IMPACC cohort to identify a multi-omics "recovery factor", trained on patient-reported physical function survey scores.
JAMA Netw Open
September 2025
Department of Psychiatry, Psychosomatics, and Psychotherapy, University of Lübeck, Lübeck, Germany.
Importance: Patients with inflammatory rheumatic diseases (IRDs) frequently experience psychological distress; however, access to psychological support remains limited.
Objective: To investigate the effectiveness of a digital psychological intervention for individuals with IRDs.
Design, Setting, And Participants: Participants aged 18 years or older were recruited across Germany between February 22 and June 4, 2024, if they had been diagnosed with rheumatoid arthritis, psoriatic arthritis, or systemic lupus erythematosus and reported psychological distress and reduced quality of life.
Tissue Eng Regen Med
September 2025
Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, #505 BanPo-Dong, SeoCho-Gu, Seoul, 06591, Republic of Korea.
Background: Sjögren's syndrome (SS) is a chronic autoimmune disease delineated by excessive lymphocyte infiltration to the lacrimal or salivary glands, leading to dry eye and dry mouth. Exosomes secreted from mesenchymal stem cells (MSC) are known to have anti-inflammatory and tissue regeneration abilities. This study endeavored to demonstrate the effect of MSC-derived exosomes on the clinical parameter of dry eyes and associated pathology in SS mouse model.
View Article and Find Full Text PDFCell Biochem Biophys
September 2025
Department of Molecular Biology and Genetics, Faculty of Engineering and Natural Sciences, Istinye University, Istanbul, 34003, Türkiye, Turkey.
Vitamin B12 is a vital water-soluble vitamin containing a central cobalt atom within its corrin ring structure. It exists in several derivatives, among which methylcobalamin (MeCbl) and adenosylcobalamin (AdCbl) are the biologically active forms that serve as cofactors in essential enzymatic reactions. Although the neurological and hematological consequences of vitamin B12 deficiency have been extensively studied, its role in immune regulation remains less well understood.
View Article and Find Full Text PDFDermatol Ther (Heidelb)
September 2025
Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Via Massarenti 9, 40138, Bologna, Bologna, Italy.
Glucagon-like peptide 1 receptor agonists (GLP-1 RAs) have gained prominence for their efficacy in treating type 2 diabetes and obesity. Recent evidence suggests that their pleiotropic effects-beyond glycemic control and weight loss-include anti-inflammatory, immunomodulatory, and antioxidative effects, which may beneficially support various dermatologic conditions such as psoriasis, hidradenitis suppurativa, acanthosis nigricans, and Hailey-Hailey disease. However, GLP-1 RAs are also associated with emerging cutaneous adverse drug reactions, including bullous, exanthematous and vasculitic manifestations, and other rare side effects.
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