Investigation of Sustained BMP Delivery in the Prevention of Medication-Related Osteonecrosis of the Jaw (MRONJ) in a Rat Model.

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ID: 55118
2019
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Abstract
Medication-related osteonecrosis of the jaw (MRONJ) poses an ongoing challenge for clinicians and researchers. Currently, there is a lack of preventative measures available for at-risk patients undergoing tooth extractions, especially those with prior bisphosphonate treatment due to osteoporosis or bone metastasis diagnoses. Here, these issues are addressed using a preventative tissue engineering strategy against MRONJ development. This study evaluates the efficacy of a poly(ethylene glycol)-heparin hydrogel as a tool for the delivery of arginylglycylaspartic acid (RGD) and recombinant human bone morphogenic protein-2 (rhBMP-2). Three groups of skeletally mature rats each receive two doses of intravenous zoledronic acid prior to surgery and undergo extraction of the right first mandibular molar with gingival closure. Experimental groups either have the sockets left empty, filled with hydrogel minus rhBMP-2, or filled with hydrogel plus rhBMP-2. Eight weeks postoperatively specimens are analyzed using radiological, histological, and scanning electron microscopy (SEM) techniques. µCT analysis shows increased bone formation with hydrogel/rhBMP-2 delivery compared to the empty socket. Hydrogel-treated groups display increased presence of osteocytes and increased osteoclastic action compared to the empty sockets. These results represent the first step toward improved delivery of rhBMP-2 and a potential MRONJ preventative for patients undergoing bisphosphonate treatment.
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brierly2019investigationmacromolecular Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Brierly, Gary I;Ren, Jiongyu;Baldwin, Jeremy;Saifzadeh, Siamak;Theodoropoulos, Christina;Tsurkan, Mikhail V;Lynham, Anthony;Hsu, Edward;Nikolarakos, Dimitrios;Werner, Carsten;Woodruff, Maria A;Hutmacher, Dietmar W;Bray, Laura J;
Journal macromolecular bioscience
Year 2019
DOI
10.1002/mabi.201900226
URL
Keywords
hydrogel bisphosphonatesm bone morphogenetic bone regeneration medication-related osteonecrosis of the jaw

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