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Intra-articular injection of micronized dehydrated human amnion/chorion membrane attenuates osteoarthritis
Introduction:
Micronized dehydrated human amnion/chorion membrane (μ-dHACM) is derived from donated human placentae and has anti-inflammatory, low immunogenic and anti-fibrotic properties. The objective of this study was to quantitatively assess the efficacy of μ-dHACM as a disease modifying intervention in a rat model of osteoarthritis (OA). It was hypothesized that intra-articular injection of μ-dHACM would attenuate OA progression.
Methods:
Lewis rats underwent medial meniscal transection (MMT) surgery to induce OA. Twenty four hours post-surgery, μ-dHACM or saline was injected intra-articularly into the rat joint. Naïve rats also received μ-dHACM injections. Microstructural changes in the tibial articular cartilage were assessed using equilibrium partitioning of an ionic contrast agent (EPIC-μCT) at 21 days post-surgery. The joint was also evaluated histologically and synovial fluid was analyzed for inflammatory markers at 3 and 21 days post-surgery.
Results:
There was no measured baseline effect of μ-dHACM on cartilage in naïve animals. Histological staining of treated joints showed presence of μ-dHACM in the synovium along with local hypercellularity at 3 and 21 days post-surgery. In MMT animals, development of cartilage lesions at 21 days was prevented and number of partial erosions was significantly reduced by treatment with μ-dHACM. EPIC-μCT analysis quantitatively showed that μ-dHACM reduced proteoglycan loss in MMT animals.
Conclusions:
μ-dHACM is rapidly sequestered in the synovial membrane following intra-articular injection and attenuates cartilage degradation in a rat OA model. These data suggest that intra-articular delivery of μ-dHACM may have a therapeutic effect on OA development.
Insights
Micronized dehydrated human amnion/chorion membrane (μ-dHACM) injection prevented cartilage damage in a rat osteoarthritis model. This regenerative medicine approach shows therapeutic potential for osteoarthritis by reducing proteoglycan loss and cartilage erosion.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Orthopedics
Background:
- Micronized dehydrated human amnion/chorion membrane (μ-dHACM) possesses anti-inflammatory, anti-fibrotic, and low immunogenic properties.
- Derived from donated human placentae, μ-dHACM is a potential therapeutic agent for degenerative joint diseases.
Purpose of the Study:
- To quantitatively assess the efficacy of μ-dHACM as a disease-modifying intervention in a rat model of osteoarthritis (OA).
- To test the hypothesis that intra-articular injection of μ-dHACM would attenuate OA progression.
Main Methods:
- Osteoarthritis was induced in Lewis rats via medial meniscal transection (MMT).
- Intra-articular injections of μ-dHACM or saline were administered 24 hours post-surgery.
- Cartilage microstructural changes were assessed using EPIC-μCT, alongside histological evaluation and synovial fluid analysis for inflammatory markers.
Main Results:
- μ-dHACM treatment prevented cartilage lesion development and significantly reduced partial erosions in MMT rats at 21 days.
- EPIC-μCT analysis confirmed that μ-dHACM reduced proteoglycan loss in MMT animals.
- No adverse effects on cartilage were observed in naïve animals receiving μ-dHACM.
Conclusions:
- μ-dHACM is rapidly sequestered in the synovial membrane after intra-articular injection.
- μ-dHACM effectively attenuates cartilage degradation in a rat OA model.
- Intra-articular delivery of μ-dHACM demonstrates therapeutic potential for osteoarthritis development.
