ArticleOsteoarthritis and cartilage2017
Lubricin/proteoglycan 4 increases in both experimental and naturally occurring equine osteoarthritis.
Article in Osteoarthritis and cartilage, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 1 of them a synthesis that pooled it.
What it found
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The trial behind it
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
34 citing papers in PubMed, 1 synthesis or guideline pooled it, 56 citations in OpenAlex.
- Lubricin in experimental and naturally occurring osteoarthritis: a systematic review.Osteoarthritis and cartilage · 2020Pooled it
- Disruption of proteoglycan 4 (PRG4)-CD44 signaling modulates chronic synovitis in conditionally inactivated mice.Arthritis research & therapy · 2026Article
- Lubricin in osteoarthritis: functions and therapeutic prospects.Frontiers in immunology · 2026Review
- Synovial fluid alpha-2-macroglobulin, gelsolin and lubricin distinguish between osteoarthritic and healthy equine joints.Equine veterinary journal · 2026Article
- Single-cell RNA sequencing of healthy and diseased rat temporomandibular joint condyle cartilage.PloS one · 2026Article
- Delayed Lubricin Injection Improves Cartilage Repair Tissue Quality in an In Vivo Rabbit Osteochondral Defect Model.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2025Article
- Disruption of Proteoglycan 4 (PRG4)-CD44 Signaling Modulates Chronic Synovitis in Conditionally Inactivated Mice.Research square · 2025Article
- Proteomics Reveals Increased Periostin in Synovial Fluid From Canine and Human Anterior Cruciate Ligament Injury.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2025Article
- Innate immune pathway activation to modulate mesenchymal stromal cell (MSC) interactions with synovium and cartilage.Frontiers in bioengineering and biotechnology · 2025Article
- Correlation of fecal microbiome dysregulation to synovial transcriptome in an equine model of obesity associated osteoarthritis.Annals of translational medicine · 2024Article
- Characterization of the single cell landscape in normal and osteoarthritic equine joints.Annals of translational medicine · 2024Article
- Interactions and Trends of Interleukins, PAI-1, CRP, and TNF-α in Inflammatory Responses during the Perioperative Period of Joint Arthroplasty: Implications for Pain Management-A Narrative Review.Journal of personalized medicine · 2024Review
- Recombinant manufacturing of multispecies biolubricants.bioRxiv : the preprint server for biology · 2024Article
- Article
- Immune Activated Cellular Therapy for Drug Resistant Infections: Rationale, Mechanisms, and Implications for Veterinary Medicine.Veterinary sciences · 2022Review
- TLR-activated mesenchymal stromal cell therapy and antibiotics to treat multi-drug resistantAnnals of translational medicine · 2022Article
- Bone Marrow MSC Secretome Increases Equine Articular Chondrocyte Collagen Accumulation and Their Migratory Capacities.International journal of molecular sciences · 2022Article
- Intra-Articular Adeno-Associated Virus-Mediated Proteoglycan 4 Gene Therapy for Preventing Posttraumatic Osteoarthritis.Human gene therapy · 2022Article
- Metabolism and global protein glycosylation are differentially expressed in healthy and osteoarthritic equine carpal synovial fluid.Equine veterinary journal · 2022Article
- The synthetic artificial stem cell (SASC): Shifting the paradigm of cell therapy in regenerative engineering.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
Corrections and comments
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
Abstract
objectiveThe goals of this study were (1) to quantify proteoglycan 4 (PRG4) gene expression; (2) to assess lubricin immunostaining; and (3) to measure synovial fluid lubricin concentrations in clinical and experimental models of equine carpal osteoarthritis (OA).
designLubricin synovial fluid concentrations and cartilage and synovial membrane PRG4 expression were analyzed in research horses undergoing experimental OA induction (n = 8) and in equine clinical patients with carpal OA (n = 58). Lubricin concentrations were measured using a custom sandwich enzyme-linked immunosorbent assay, and PRG4 expression was quantified using qRT-PCR. Lubricin immunostaining was assessed in synovial membrane and osteochondral sections in the experimental model.
resultsLubricin concentrations increased in synovial fluid following induction of OA, peaking at 21 days post-operatively in OA joints vs sham-operated controls (331 ± 69 μg/mL vs 110 ± 19 μg/mL, P = 0.001). Lubricin concentrations also increased in horses with naturally occurring OA as compared to control joints (152 ± 32 μg/mL vs 68 ± 4 μg/mL, P = 0.003). Synovial membrane PRG4 expression increased nearly 2-fold in naturally occurring OA (P = 0.003), whereas cartilage PRG4 expression decreased 2.5-fold (P = 0.025). Lubricin immunostaining was more pronounced in synovial membrane from OA joints as compared to controls, with intense lubricin localization to sites of cartilage damage.
conclusionsAlthough PRG4 gene expression decreases in OA cartilage, synovial membrane PRG4 expression, synovial fluid lubricin concentrations and lubricin immunostaining all increase in an equine OA model. Lubricin may be elevated to protect joints from post-traumatic OA.
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Registered trials
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.