A controlled release bupivacaine-alginate construct: Effect on chondrocyte hypertrophy conversion
Mollie S Davis1, Ileana Marrero-Berrios1, Xiomara I Perez1
1Rutgers University, Department of Biomedical Engineering, Piscataway, NJ, USA.
Osteoarthritis and Cartilage Open
|April 8, 2022
Summary
This study shows an engineered local anesthetic construct reduces inflammation and promotes chondrocyte regeneration in osteoarthritis. The construct offers a promising alternative for managing osteoarthritis progression and pain.
Area of Science:
- Biomedical Engineering
- Orthopedics
- Cell Biology
Background:
- Osteoarthritis (OA) is a degenerative joint disease affecting millions, characterized by chondrocyte hypertrophy and inflammation.
- Current OA treatments like NSAIDs and corticosteroids manage symptoms but lack regenerative capacity and have side effects.
- Local anesthetics (LA) offer pain relief but are typically short-acting, limiting their use in chronic OA.
Purpose of the Study:
- To evaluate the efficacy of a novel sustained-release local anesthetic (LA) construct in an in vitro osteoarthritis (OA) model.
- To assess the impact of the engineered LA system on chondrocyte viability, inflammatory markers, and regenerative markers in an OA-like environment.
Main Methods:
- Chondrocytes were cultured and exposed to different LA formulations (bolus, liposomal, engineered construct) under inflammatory conditions (TNF-α and IL-1α).
- Cell viability, interleukin-8 (IL-8), interleukin-6 (IL-6) secretion, collagenase activity, and proteoglycan deposition were measured over 24, 48, and 96 hours.
Main Results:
- The engineered LA construct maintained chondrocyte viability and supported regenerative functions.
- Higher initial doses delivered by the construct enhanced regeneration and reduced inflammation without compromising cell viability.
- Compared to bolus LA, the construct promoted a less hypertrophic chondrocyte phenotype.
Conclusions:
- The engineered sustained-release LA construct creates an anti-inflammatory environment conducive to chondrocyte health.
- This approach mitigates chondrocyte hypertrophy and inflammation, suggesting a potential to slow OA progression.
- The construct represents a promising therapeutic strategy for managing osteoarthritis by promoting a regenerative and anti-inflammatory environment.
