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Home / Equine Research Bank / Animals (Basel) / A Safety and Efficacy Study of a Synthetic Biolubricant in a...
Animals : an open access journal from MDPI2025; 15(3); doi: 10.3390/ani15030404

A Safety and Efficacy Study of a Synthetic Biolubricant in an Equine Model of Post-Traumatic Osteoarthritis.

Abstract: Post-traumatic osteoarthritis (PTOA) is a common cause of lameness in the horse. There is no cure, therefore treatments are aimed at reducing pain and improving the joint environment by modifying inflammatory pathways or by viscosupplementation. Here, we report the safety and efficacy of the biolubricant (poly(2-methacryloyloxyethyl phosphorylcholine; pMPC) to mitigate the physical, gross, histological, and biochemical effects of arthritis. We created an osteochondral fragment in the middle carpal joint of one limb in 16 horses to induce PTOA; the contralateral limb served as a sham-operated joint. Two weeks postoperative, half (n = 8) of the horses received a single injection of pMPC in the PTOA joint, while the other half received saline. All sham-operated joints (n = 16) received saline. We conducted clinical evaluations weekly while synovial fluid biomarkers were measured biweekly during the 70-day study period. Subsequently, we performed postmortem gross and histologic analyses. Horses in which PTOA joints were treated with pMPC exhibited mild increases in clinical data, including lameness, effusion, and flexion scores. Similarly, synovial cell count, total protein, and prostaglandin E2 values were higher for pMPC-treated joints. Radiographic changes included significantly higher osteophyte scores in pMPC-treated joints at the terminal timepoint. The biolubricant may demonstrate some chondroprotective effects with lower total erosion scores and higher cartilage glycosaminoglycan content. In summary, when pMPC is administered to PTOA joints, the biolubricant induces a mild inflammatory response but may offer some chondroprotective effects in horses.
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Publication Date: 2025-02-01 PubMed ID: 39943174PubMed Central: PMC11815898DOI: 10.3390/ani15030404Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This study investigates the safety and efficacy of a synthetic compound, biolubricant (pMPC), in managing the symptoms and effects of post-traumatic osteoarthritis (PTOA) in horses.

Objective and Methodology of the Research

  • The research focuses on the problem of post-traumatic osteoarthritis (PTOA), a common cause of lameness in horses for which there is no cure. The treatments for this condition are typically aimed at lowering pain and improving the environment in the horse’s joints by modifying inflammatory reactions or by viscosupplementation.
  • The researchers conducted a study on 16 horses, creating an osteochondral fragment in the middle carpal joint of one limb in each horse, to induce PTOA.
  • The experiment made use of a synthetic biolubricant (pMPC) to examine its impact on the physical, gross, histological, and biochemical effects of arthritis. Two weeks post-operative, half of the horses were treated with a single injection of pMPC in the affected joint, while the other half served as a control group and received saline. The contralateral limbs without induced PTOA (sham-operated joints) in all horses also received saline.

Observations and Findings

  • During the 70-day study period, clinical evaluations occurred weekly, while synovial fluid biomarkers were measured biweekly. Postmortem gross and histologic analyses were performed after this period.
  • Joints treated with pMPC showed minor increases in clinical data, such as lameness, effusion (excess liquid in the joint that causes swelling), and flexion scores. In addition to these, synovial cell count, total protein, and prostaglandin E values were also higher in pMPC-treated joints.
  • More significant osteophyte (bony growth in the joint) scores were recorded at the final stage of the study, suggesting potentially negative radiographic changes related to pMPC treatment.
  • However, the biolubricant also seemed to show some chondroprotective effects, as seen in lower total erosion scores and more significant cartilage glycosaminoglycan content. This suggests that while pMPC may prompt a slight inflammatory reaction, it may also offer some measure of protection to the cartilage in the joints of horses suffering from PTOA.

Potential Implications

  • This research indicates that pMPC could be an option for managing PTOA in horses. Despite causing a mild inflammation, the biolubricant might offer some level of chondroprotection.
  • However, further research and trials may be required to fully understand the long-term effects and clinical implications of using this biolubricant treatment for horses suffering from PTOA.

Cite This Article

APA
Luedke LK, Seabaugh KA, Cooper BG, Snyder BD, Wimmer MA, McIlwraith CW, Barrett MF, Kawcak CE, Grinstaff MW, Goodrich LR. (2025). A Safety and Efficacy Study of a Synthetic Biolubricant in an Equine Model of Post-Traumatic Osteoarthritis. Animals (Basel), 15(3). https://doi.org/10.3390/ani15030404

Publication

Animals : an open access journal from MDPI
ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 15
Issue: 3

Researcher Affiliations

Luedke, Lauren K
  • Gail Holmes Equine Orthopaedic Research Center, Translational Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Seabaugh, Kathryn A
  • Gail Holmes Equine Orthopaedic Research Center, Translational Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Cooper, Benjamin G
  • Departments of Chemistry and Biomedical Engineering, Boston University, Boston, MA 02215, USA.
Snyder, Brian D
  • Department of Orthopedic Surgery, Boston Children's Hospital, Boston, MA 02115, USA.
Wimmer, Markus A
  • Department of Orthopedic Surgery, Rush University, Chicago, IL 60612, USA.
McIlwraith, C Wayne
  • Gail Holmes Equine Orthopaedic Research Center, Translational Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Barrett, Myra F
  • Gail Holmes Equine Orthopaedic Research Center, Translational Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Kawcak, Christopher E
  • Gail Holmes Equine Orthopaedic Research Center, Translational Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.
Grinstaff, Mark W
  • Departments of Chemistry and Biomedical Engineering, Boston University, Boston, MA 02215, USA.
Goodrich, Laurie R
  • Gail Holmes Equine Orthopaedic Research Center, Translational Medicine Institute, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA.

Grant Funding

  • 000000 / Boston University, The Coulter Foundation

Conflict of Interest Statement

A patent was filed by the university on the polymers and is available for licensing. No IP has been licensed to the authors.

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