ArticleScientific reports2016
Lubricin/Proteoglycan 4 binds to and regulates the activity of Toll-Like Receptors In Vitro.
Article in Scientific reports, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers, 1 of them a synthesis that pooled it.
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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
83 citing papers in PubMed, 1 synthesis or guideline pooled it, 165 citations in OpenAlex.
- Lubricin in experimental and naturally occurring osteoarthritis: a systematic review.Osteoarthritis and cartilage · 2020Pooled it
- Systemic and local autoantibody responses to extracellular matrix proteins define inflammatory phenotypes across arthropathies.Rheumatology (Oxford, England) · 2026Article
- Lubricin protects against cartilage degeneration following anterior cruciate ligament transection in rats.Scientific reports · 2026Article
- Potential Role of Mast Cells in Intervertebral Disc Ageing, Herniation Resolution, and Degeneration: Evidence and Lessons Learned from Studies of Mast Cells in Other Connective Tissues.International journal of molecular sciences · 2026Review
- Disruption of proteoglycan 4 (PRG4)-CD44 signaling modulates chronic synovitis in conditionally inactivated mice.Arthritis research & therapy · 2026Article
- Proteoglycan-4 (PRG4) serum concentration is lower in aged mice, and genetic deficiency impacts survival probability, blood parameters, and bone during aging.GeroScience · 2026Article
- Article
- Lubricin in osteoarthritis: functions and therapeutic prospects.Frontiers in immunology · 2026Review
- Enhanced lubricin secretion by human synovial mesenchymal stem cells compared to adipose mesenchymal stem cells.Stem cell research & therapy · 2025Article
- Disruption of Proteoglycan 4 (PRG4)-CD44 Signaling Modulates Chronic Synovitis in Conditionally Inactivated Mice.Research square · 2025Article
- Lectin Microarray-based Glycomics and Machine Learning Identify Shared Osteoarthritis Biomarkers in Humans, Dogs, and Horses.bioRxiv : the preprint server for biology · 2025Article
- Mesenchymal progenitor-derived proteoglycan 4 regulates the transdifferentiation of chondrocytes into osteoblasts during fracture healing.Stem cells translational medicine · 2025Article
- Femur Shape Changes in Prg4-Deficient Mice: Morphological Insights Into Joint Well-Being.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 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
- Severe osteoarthritis in aged PANX3 knockout mice: implications for a novel primary osteoarthritis model.JBMR plus · 2025Article
- Review
- Postnatal deletion of Phlpp1 in chondrocytes delays post-traumatic osteoarthritis in male mice.Osteoarthritis and cartilage open · 2025Article
- Transcriptomic responses of lung mesenchymal cells during pneumonia.JCI insight · 2025Article
- Differential Gene Expression Analysis in a Lumbar Spinal Stenosis Rat Model via RNA Sequencing: Identification of Key Molecular Pathways and Therapeutic Insights.Biomedicines · 2025Article
- Role of fibroblasts in nonfibrotic autoimmune skin diseases.Molecular medicine (Cambridge, Mass.) · 2024Review
23 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
17 authors at 2 institutions in 2 countries.
Funding
Abstract
Proteoglycan 4 (PRG4/lubricin) is secreted by cells that reside in articular cartilage and line the synovial joint. Lubricin may play a role in modulating inflammatory responses through interaction with CD44. This led us to examine if lubricin could be playing a larger role in the modulation of inflammation/immunity through interaction with Toll-like receptors (TLRs). Human Embryonic Kidney (HEK) cells overexpressing TLRs 2, 4 or 5 and surface plasmon resonance were employed to determine if full length recombinant human lubricin was able to bind to and activate TLRs. Primary human synovial fibroblasts were also examined using flow cytometry and Luminex multiplex ELISA. A rat destabilization model of osteoarthritis (OA) was used to determine if lubricin injections were able to regulate pain and/or inflammation in vivo. Lubricin can bind to and regulate the activity of TLRs, leading to downstream changes in inflammatory signalling independent of HA. We confirmed these findings in vivo through intra-articular injections of lubricin in a rat OA model where the inhibition of systemic inflammatory signaling and reduction in pain were observed. Lubricin plays an important role in regulating the inflammatory environment under both homeostatic and tissue injury states.
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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.