| Autor: |
Osorno LL; Biomimetic and Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA., Mosley RJ; Biomimetic and Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA., Poley PL; Biomimetic and Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA., Bowers J; Genisphere, LLC, Hatfield, Pennsylvania, USA., Gorski G; Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania, USA., Gerhart J; Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania, USA., Getts R; Code Biotherapeutics, Pennsylvania, USA., George-Weinstein M; Philadelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania, USA., Byrne ME; Biomimetic and Biohybrid Materials, Biomedical Devices, and Drug Delivery Laboratories, Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA.; Department of Chemical Engineering, Rowan University, Glassboro, New Jersey, USA.; OcuMedic, Inc., Mullica Hill, New Jersey, USA. |
| Abstrakt: |
Purpose: To compare a novel, sustained release formulation and a bolus injection of a targeted nanocarrier for the ability to specifically deplete cells responsible for the development of posterior capsule opacification (PCO) in week-long, dynamic cell cultures. Methods: A novel, injectable, thermosensitive poly(D,L-lactic-co-glycolic acid)-b-poly(ethylene glycol)-b-poly(D,L-lactic-co-glycolic acid) (PLGA-PEG-PLGA) triblock copolymer hydrogel was engineered for the sustained release of targeted, nucleic acid nanocarriers loaded with cytotoxic doxorubicin (G8:3DNA:Dox). Human rhabdomyosarcoma (RD) cells were used due to their expression of brain-specific angiogenesis inhibitor 1 (BAI1), a specific marker for the myofibroblasts responsible for PCO. Under constant media flow, nanocarriers were injected into cell cultures as either a bolus or within the hydrogel. Cells were fixed and stained every other day for 7 days to compare targeted depletion of BAI1 + cells. Results: The formulation transitions to a gel at physiological temperatures, is optically clear, noncytotoxic, and can release G8:3DNA:Dox nanocarriers for up to 4 weeks. In RD cell cultures, G8:3DNA:Dox nanocarriers specifically eliminated BAI1 + cells. The bolus nanocarrier dose showed significantly reduced cell depletion overtime, while the sustained release of nanocarriers showed increased cell depletion over time. By day 7, <2% of BAI1 + cells were depleted by the bolus injection and 74.2% BAI1 + cells were targeted by the sustained release of nanocarriers. Conclusions: The sustained release of nanocarriers from the hydrogel allows for improved therapeutic delivery in a dynamic system. This method can offer a more effective and efficient method of prophylactically treating PCO after cataract surgery. |
