Hydrogel treatment for idiopathic osteoarthritis in a Dunkin Hartley Guinea pig model
Abstract
The study objective was to determine if intraarticular injections of an extracellular matrix (ECM) powder and blood composite (ECM-B) would have a significant impact on post-operative gait parameters without eliciting adverse cartilage changes or severe lymphatic reactions in an idiopathic osteoarthritis (OA) model. Twenty-one Dunkin Hartley Guinea pigs received an intraarticular injection of ECM-B in each knee and were split into sub-groups for gait assessment and post-harvest knee evaluations at 1 week (n = 5), 2 weeks (n = 5), 4 weeks (n = 5), or 8 weeks (n = 6). The results were compared with a control group (n = 5), which underwent bilateral injections of phosphate-buffered saline (PBS), gait measurements at 1, 2, 4, and 8 weeks, and post-mortem knee evaluation at 8 weeks post-injection. Hind limbs and popliteal lymph nodes were collected at the Week 8 endpoint and underwent histological analysis by a veterinary pathologist. Significant improvement in hind limb base of support was observed in the ECM-B group compared to the control group at Week 4 but was no longer significant by Week 8. No significant differences were observed between control and ECM-B groups in hind limb cartilage, synovium, or popliteal lymph node histology at Week 8. In conclusion, administration of an ECM-B material may improve gait for a limited time without significant adverse effects on the cartilage, synovium, or local lymph nodes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 30, 2022
- Source ID
- 10.1371/journal.pone.0278338
Entities
People
- Benedikt L Proffen
- Braden C Fleming
- Janine Molino
- Lauren R. Parola
- Martha M Murray
- Megan P. Pinette
- Meggin Q. Costa
- Naga Padmini Karamchedu
- Nicholas J. Sant
Organizations
- National Institute of General Medical Sciences
- United States Department of Defense