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The Therapeutic Potential of MicroRNAs as Orthobiologics for Skeletal Fractures

Journal

JOURNAL OF BONE AND MINERAL RESEARCH
Volume 34, Issue 5, Pages 797-809

Publisher

WILEY
DOI: 10.1002/jbmr.3708

Keywords

BONE DEFECT; EXOSOME; FRACTURE REPAIR; MICRORNA (miRNA); NONUNION; ORTHOBIOLOGIC; OSTEOPOROSIS

Funding

  1. Eunice Kennedy Shriver National Institute of Child Health & Human Development of the National Institutes of Health [R15HD092931, R01HD070888]

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The repair of a fractured bone is critical to the well-being of humans. Failure of the repair process to proceed normally can lead to complicated fractures, exemplified by either a delay in union or a complete nonunion. Both of these conditions lead to pain, the possibility of additional surgery, and impairment of life quality. Additionally, work productivity decreases, income is reduced, and treatment costs increase, resulting in financial hardship. Thus, developing effective treatments for these difficult fractures or even accelerating the normal physiological repair process is warranted. Accumulating evidence shows that microRNAs (miRNAs), small noncoding RNAs, can serve as key regulatory molecules of fracture repair. In this review, a brief description of the fracture repair process and miRNA biogenesis is presented, as well as a summary of our current knowledge of the involvement of miRNAs in physiological fracture repair, osteoporotic fractures, and bone defect healing. Further, miRNA polymorphisms associated with fractures, miRNA presence in exosomes, and miRNAs as potential therapeutic orthobiologics are also discussed. This is a timely review as several miRNA-based therapeutics have recently entered clinical trials for nonskeletal applications and thus it is incumbent upon bone researchers to explore whether miRNAs can become the next class of orthobiologics for the treatment of skeletal fractures. (c) 2019 American Society for Bone and Mineral Research.

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