ArticleAnnals of the rheumatic diseases2005
Synovial tissue inflammation in early and late osteoarthritis.
Article in Annals of the rheumatic diseases, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 449 papers, 4 of them syntheses that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
449 citing papers in PubMed, 4 syntheses or guidelines pooled it, 993 citations in OpenAlex.
- Cell-based therapies have disease-modifying effects on osteoarthritis in animal models: A systematic review by the ESSKA Orthobiologic Initiative. Part 3: Umbilical cord, placenta, and other sources for cell-based injectable therapies.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025Pooled it
- Stem cell injections for osteoarthritis of the knee.The Cochrane database of systematic reviews · 2025Pooled it
- Autologous chondrocyte implantation provides good long-term clinical results in the treatment of knee osteoarthritis: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Pooled it
- Lycium barbarum polysaccharides in ageing and its potential use for prevention and treatment of osteoarthritis: a systematic review.BMC complementary medicine and therapies · 2021Pooled it
- Probiotics and palmitoylethanolamide (PEA) for osteoarthritic pain: individual effects in a multiple baseline design study.BMC complementary medicine and therapies · 2026Trial
- Injection of human umbilical cord mesenchymal stem cells exosomes for the treatment of knee osteoarthritis: from preclinical to clinical research.Journal of translational medicine · 2025Trial
- Effects of high impact exercise on systemic cytokines in women with mild knee osteoarthritis: A 12-month RCT.Osteoarthritis and cartilage open · 2025Trial
- Intra-articular autologous conditioned serum and triamcinolone injections in patients with knee osteoarthritis: a controlled, randomized, double-blind study.The Journal of international medical research · 2023Trial
- Tsukubacyclinone, a novel angucyclinone compound with anti-inflammatory activity in synovial cell line SW982, produced by Streptomyces sp. K21-0141.The Journal of antibiotics · 2026Article
- Effusion and synovial hyperplasia: Distinct constructs in early and late-stage knee OA.Osteoarthritis imaging · 2026Article
- Adipose-Joint Crosstalk in Obesity-Induced Osteoarthritis: Mechanisms, Biomarkers, and Translational Therapeutic Opportunities.Current rheumatology reports · 2026Review
- Expression Analysis of Mitochondrial Energy Metabolism-Related Genes Identifies IRS2 as a Key Modulator in M2 Synovial Macrophages of Osteoarthritis.Biomedicines · 2026Article
- Critical Overview of Molecular Insights into Osteoarthritis and Therapeutic Targets: Cytokines, RANKL, MMPs, Adipokines and Phosphate Dysregulation.International journal of molecular sciences · 2026Review
- Wnt/β-catenin signaling regulates fibrotic atrophy of intra-articular adipose tissue in post-traumatic osteoarthritis.bioRxiv : the preprint server for biology · 2026Article
- Inflammatory changes in osteoarthritis knees undergoing total knee arthroplasty: a prospective clinical and histopathological study.International orthopaedics · 2026Observational
- Single-cell RNA sequencing reveals extensive fibrotic remodeling and pathogenic chondrocyte subpopulations in developmental dysplasia of the hip.Translational pediatrics · 2026Article
- Revisiting osteoarthritis as an inflammatory disease: characterization of synovitis grading and synovial pathotypes in surgical specimens.Arthritis research & therapy · 2026Article
- Enrichment of HLA-DRiScience · 2026Article
- Article
- Integration of gold standard arthroscopy, MRI and synovial histopathology outcomes for enhancing early knee osteoarthritis diagnosis.Aging clinical and experimental research · 2026Article
389 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo compare selected immunohistological features of inflammation in synovial tissue from patients with early and late osteoarthritis (OA).
methodsSynovial tissue samples were obtained from 10 patients with knee pain, normal radiographs, and arthroscopic manifestations of OA (early OA), and from 15 patients with OA undergoing knee joint arthroplasty (late OA). Conventional immunohistochemical techniques were used to measure microscopic manifestations of inflammation. The inflammatory cell infiltrate, blood vessel formation, and angiogenic factors, NF-kappaB activation, expression of tumour necrosis factor alpha (TNFalpha) and interleukin 1beta (IL1beta), and the presence of cyclo-oxygenase (COX)-1 and COX-2 were quantified. Fibroblast-like synoviocytes (FLS) were isolated from early and late OA tissue samples to compare in vitro production of prostaglandin E2 (PGE2)
resultsSynovial tissue from patients with early OA demonstrated significantly greater CD4+ (p = 0.017) and CD68+ (p<0.001) cell infiltration, blood vessel formation (p = 0.01), vascular endothelial growth factor (p = 0.001), and intercellular adhesion molecule-1 expression (p<0.001). Numbers of cells producing TNFalpha and IL1beta were also significantly greater in early OA (p<0.001). Manifestations of inflammation in early OA were associated with increased expression of the NF-kappaB1 (p<0.001) and RelA (p = 0.015) subunits, and with increased COX-2 expression (p = 0.04). Cytokine-induced PGE2 production by cultured FLS was similar in both groups.
conclusionIncreased mononuclear cell infiltration and overexpression of mediators of inflammation were seen in early OA, compared with late OA. Isolated FLS were functionally similar in both groups, consistent with microenvironmental differences in the synovial tissue during different phases of OA. These observations may have important therapeutic implications for some patients during the early evolution of OA.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.