ABSTRACT: miRNA expression data from callus in standard fracture healing models and from fibrous tissues in nonunion models in rats on post-fracture day 14
Project description:Profiling of miRNA expressions comparing standard fracture healing models with nonunion models in rats 12w, male, Sprague–Dawley rats were used in this study. Animals were randomized to receive either a surgical treatment that has been shown to produce a nonunion or to a standard stabilized closed femoral shaft fracture that is known to successfully heal. The details of these procedures have been previously described. Briefly, to produce standard healing models, a 1.2-mm diameter K-wire was inserted retrograde into the right femoral intramedullary canal and a closed transverse femoral shaft fracture was produced using a three-point bending apparatus with a drop weight . To produce the nonunion, the fractured site was additionally exposed, and the periosteum was cauterized circumferentially for a distance of 2 mm on each side of the fracture . Five animals from each group were euthanized on post-fracture day 14 for microarray analysis.
Project description:Bone regeneration is a highly efficient process allowing scarless healing after injury. Yet, musculoskeletal traumatic injury, when fracture is combined with adjacent muscle injury, alters bone healing leading to fibrous nonunion. The periosteum, the outer layer of bones, is a critical source of skeletal stem/progenitor cells (SSPCs), as well as immune, endothelial and neural cells during bone repair. We generated single nuclei datasets from the injured perioteum and hematoma at day 1-post fracture and from the hematoma/callus at day 5 post-musculoskeletal traumatic injury. These datasets were analyzed in combination with datasets from GSE234451.
Project description:This is a study of femoral fracture healing in female rats 16 weeks old at fracture to compare intramedullary nailing, screw and plate fixation, and sham surgery. The sham surgery group received a surgical exposure of the femur, but no fracture, no plate, and no nail. Samples were collected at 1 day, 3 days, 1 week, 2 weeks, 4 weeks, and 6 weeks after surgery. Each sample is a pool of RNA from three rats from the same surgery group at the same time point after fracture. The middle third of the femur was collected with the cortical bone, fracture callus, and marrow elements. Mid-diaphyseal, simple, transverse fractures were induced by a Gigli saw. The no fracture sample was a time 0 control collected on the day of surgery from intact rats.
Project description:This is a study of femoral fracture healing in female rats 16 weeks old at fracture to compare intramedullary nailing, screw and plate fixation, and sham surgery. The sham surgery group received a surgical exposure of the femur, but no fracture, no plate, and no nail. Samples were collected at 1 day, 3 days, 1 week, 2 weeks, 4 weeks, and 6 weeks after surgery. Each sample is a pool of RNA from three rats from the same surgery group at the same time point after fracture. The middle third of the femur was collected with the cortical bone, fracture callus, and marrow elements. Mid-diaphyseal, simple, transverse fractures were induced by a Gigli saw. The no fracture sample was a time 0 control collected on the day of surgery from intact rats. Keywords = rat Keywords = fracture Keywords = plate Keywords = nail Keywords = time Keywords = femur Keywords: time-course
Project description:A study of rat femoral fracture healing in young (6 weeks old at fracture), adult (26 weeks old at fracture), and old (52 weeks old at fracture) rats. Samples were collected at time of surgery (intact controls) and at 3 days, 1 week, 2 weeks, 4 weeks, and 6 weeks after fracture. Samples were the mid third of the femoral length including the external callus, cortical bone and marrow elements. Fracture was stabilized with an intramedullary rod prior to fracture with a Bonnarens and Einhorn device.
Project description:The specific genes that distinguish normal fracture healing from abnormal healing or nonunion in humans are unknown. This study was an exploratory investigation of peripheral blood from acutely injured fracture patients collected over multiple days to compare normal healers, slow healers, and nonunion outcomes. We used microarrays to do a global comparison between acutely injured (AI) subjects (AIS) vs. age- and sex-matched healthy volunteers (HV) and chronic Nonunion (NU) patients.
Project description:The specific genes that distinguish normal fracture healing from abnormal healing or nonunion in humans are unknown. This study was an exploratory investigation of peripheral blood from acutely injured fracture patients collected over multiple days to compare normal healers, slow healers, and nonunion outcomes. We used microarrays to do a global comparison between acutely injured (AI) subjects (AIS) vs age and sex matched healthy volunteers (HV) and chronic Nonunion (NU) patients.
Project description:The specific genes that distinguish normal fracture healing from abnormal healing or nonunion in humans are unknown. This study was an exploratory investigation of peripheral blood from acutely injured fracture patients collected over multiple days to compare normal healers, slow healers, and nonunion outcomes. We used microarrays to do a global comparison between acutely injured (AI) subjects (AIS) vs. age- and sex-matched healthy volunteers (HV) and chronic Nonunion (NU) patients.
Project description:The specific genes that distinguish normal fracture healing from abnormal healing or nonunion in humans are unknown. This study was an exploratory investigation of peripheral blood from acutely injured fracture patients collected over multiple days to compare normal healers, slow healers, and nonunion outcomes. We used microarrays to do a global comparison between acutely injured (AI) subjects (AIS) vs age and sex matched healthy volunteers (HV) and chronic Nonunion (NU) patients.
