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- W2001261538 abstract "Abstract Local insulin delivery has been shown to improve osseous healing in diabetic animals. The purpose of this study was to quantify the effects of local intramedullary delivery of saline or Ultralente insulin (UL) on various fracture healing parameters using an in vivo non‐diabetic BB Wistar rat model. Quantitation of local insulin levels showed a rapid release of insulin from the fractured femora, demonstrating complete release at 2 days. RT‐PCR analysis revealed that the expression of early osteogenic markers (Col1α2, osteopontin) was significantly enhanced with UL treatment when compared with saline controls ( p < 0.05). Significant differences in VEGF + cells and vascularity were evident between the treatment and control groups at day 7 ( p < 0.05). At day 21, histomorphometric analysis demonstrated a significant increase in percent mineralized tissue in the UL‐treated animals compared with controls ( p < 0.05), particularly within the subperiosteal region of the fracture callus. Mechanical testing at 4 weeks showed significantly greater mechanical strength for UL‐treated animals ( p < 0.05), but healing in control animals caught up at 6 weeks post‐fracture. These results suggest that the primary osteogenic effect of UL during the early stages of fracture healing (1–3 weeks) is through an increase in osteogenic gene expression, subperiosteal angiogenesis, and mineralized tissue formation. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 31: 783–791, 2013" @default.
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- W2001261538 date "2012-12-13" @default.
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- W2001261538 title "Effects of local insulin delivery on subperiosteal angiogenesis and mineralized tissue formation during fracture healing" @default.
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- W2001261538 doi "https://doi.org/10.1002/jor.22288" @default.
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