Objectives: Rheumatoid arthritis is an autoimmune disorder of unknown aetiology. Morning stiffness, a characteristic feature of rheumatoid arthritis, shows a 24-h rhythm. Noticing this rhythm, we hypothesized the presence of a similar rhythm for a rheumatoid arthritis indicator, in addition to dosing-time dependency of the anti-rheumatic effect of methotrexate in arthritis induced by collagen in rats and mice, which reflect the symptomatology of rheumatoid arthritis patients.
Methods: To measure tumour necrosis factor (TNF)-alpha concentration, blood was taken at different times (2, 6, 10, 14, 18 or 22 h after the light was turned on (HALO)) in collagen-induced arthritic mice. Methotrexate was administered at two different dosing times based on these findings to estimate arthritis.
Key Findings: The arthritis score was significantly lower in the 22 HALO-treated group than in the control and 10 HALO-treated groups in collagen-induced arthritic rats and mice. Plasma TNF-alpha concentrations showed obvious 24-h rhythms, with higher levels at light phase and lower levels at dark phase after rheumatoid arthritis crisis. Arthritis was relieved after administration of methotrexate during the dark phase in synchronization with the 24-h rhythm.
Conclusions: Our findings suggest that choosing an optimal dosing time associated with the 24-h cycling of TNF-alpha could lead to effective treatment of rheumatoid arthritis by methotrexate.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1211/jpp/61.10.0009 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Treatment of rheumatoid arthritis-associated interstitial lung disease: An appraisal of the 2023 ACR/CHEST guideline.
Curr Treatm Opt Rheumatol
December 2024
Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital, Boston, MA USA.
Purpose Of Review: To summarize the current treatment landscape of rheumatoid arthritis-associated interstitial lung disease (RA-ILD) in the context of the recent 2023 American College of Rheumatology/American College of Chest Physicians guideline for ILD treatment in systemic autoimmune rheumatic diseases.
Recent Findings: The guideline conditionally recommends mycophenolate, azathioprine, and rituximab for first-line RA-ILD therapy, with cyclophosphamide and short-term glucocorticoids as additional options. For RA-ILD progression after first line, mycophenolate, rituximab, nintedanib, tocilizumab, cyclophosphamide, and pirfenidone are conditionally recommended, while long-term glucocorticoids are conditionally recommended against.
A Lethal Case of Acute Exacerbation of Rheumatoid Arthritis - Related Interstitial Lung Disease Induced by the COVID Vaccine.
Respir Med Case Rep
December 2023
Pulmonary, Critical Care, and Sleep Medicine Division, Department of Internal Medicine, American University of Beirut Medical Center, Riad El-Solh, 1107 2020, Beirut, Lebanon.
Interstitial lung disease (ILD) exacerbation is a serious condition that can have a high morbidity and mortality. Identifying the triggers of ILD exacerbations is very challenging. Several case reports described COVID-19 vaccine-induced exacerbation of underlying interstitial lung disease, namely idiopathic interstitial pneumonias.
View Article and Find Full Text PDFBlended ƙ-carrageenan and xanthan gum hydrogel containing ketoprofen-loaded nanoemulsions: Design, characterization, and evaluation in an animal model of rheumatoid arthritis.
Drug Deliv Transl Res
January 2025
Departamento de Farmácia Industrial, Laboratório de Tecnologia Farmacêutica, Programa de Pós-Graduação Em Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria, RS, CEP 97105-900, Brazil.
This study reports the preparation of hydrogels (HG) made with xanthan gum (XG) and ƙ-carrageenan (KC) polysaccharides containing ketoprofen (KET)-loaded nanoemulsions (NK) and their evaluation in a rheumatoid arthritis (RA) model. The nano-based HGs exhibited nanometric-sized droplets (~ 100 nm), an acidic pH (5.10-6.
View Article and Find Full Text PDFInvestigation Of The Effects Of Hyperbaric Oxygen Therapy On Hepatotoxicity Induced By Leflunomide in Rats.
Undersea Hyperb Med
January 2025
Department of Pathology, Faculty of Veterinary Medicine, Erciyes University, Kayseri, Turkey.
Background: Hyperbaric Oxygen Therapy (HBO) is a treatment modality that exposes patients to 100% oxygen at higher atmospheric pressures. Recently, HBO has emerged as a potential therapeutic option for various liver diseases, offering advantages such as improved tissue oxygenation, anti-inflammatory effects, enhanced wound healing, and potential hepatoprotective properties. Understanding the benefits of HBO in liver diseases can pave the way for novel therapeutic strategies and improved patient outcomes.
View Article and Find Full Text PDFL-selectin Promotes Migration, Invasion and Inflammatory Response of Fibroblast-Like Synoviocytes in Rheumatoid Arthritis via NF-kB Signaling Pathway.
Inflammation
January 2025
Department of Orthopaedics, Affiliated Hospital of Nantong University, Medical School of Nantong University, Nantong, 226001, Jiangsu, China.
Rheumatoid arthritis (RA) is a chronic, systemic autoimmune disease characterized by chronic inflammation of the synovium and progressive joint damage. Fibroblast-like synoviocytes (FLSs) exhibit excessive proliferative and aggressive phenotypes and play a major role in the pathophysiology of RA. Previous studies have confirmed the pathologic role of L-selectin in cell adhesion and migration.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!