INTRODUCTION: While it is well established that the brain produces hypothalamic hormones and neuropeptides that influence skeletal metabolism, the impact of traumatic brain injury (TBI) on bone is unknown. Based on the recognition from clinical studies that there is an association between TBI and long-term hypothalamic pituitary dysfunction, it was hypothesized that TBI exerts a negative impact on skeletal growth and maintenance. METHODS: To test the hypothesis, this study employed a repetitive weight drop model for TBI. Four impacts were applied for four consecutive days on 5-week old female C57BL/6 J mice. Bone measurements were taken 2 weeks after the first impact. RESULTS: Bone mineral content (BMC), bone area (B area) and bone mineral density (BMD) in the total body were reduced by 14.5%, 9.8% and 5.2%, respectively, in the impacted vs. control mice. There was a 17.1% reduction in total volumetric BMD (vBMD) and a 4.0% reduction in material vBMD in cortical bone. In trabecular bone, there was a 44.0% reduction in BV/TV. Although there was no change in the cross-sectional bone size, the tibial growth plate and the tibia itself were shortened. CONCLUSION: The repetitive animal TBI model produced an immediate, strong negative impact on bone mass acquisition in young mice.
INTRODUCTION: While it is well established that the brain produces hypothalamic hormones and neuropeptides that influence skeletal metabolism, the impact of traumatic brain injury (TBI) on bone is unknown. Based on the recognition from clinical studies that there is an association between TBI and long-term hypothalamic pituitary dysfunction, it was hypothesized that TBI exerts a negative impact on skeletal growth and maintenance. METHODS: To test the hypothesis, this study employed a repetitive weight drop model for TBI. Four impacts were applied for four consecutive days on 5-week old female C57BL/6 J mice. Bone measurements were taken 2 weeks after the first impact. RESULTS: Bone mineral content (BMC), bone area (B area) and bone mineral density (BMD) in the total body were reduced by 14.5%, 9.8% and 5.2%, respectively, in the impacted vs. control mice. There was a 17.1% reduction in total volumetric BMD (vBMD) and a 4.0% reduction in material vBMD in cortical bone. In trabecular bone, there was a 44.0% reduction in BV/TV. Although there was no change in the cross-sectional bone size, the tibial growth plate and the tibia itself were shortened. CONCLUSION: The repetitive animal TBI model produced an immediate, strong negative impact on bone mass acquisition in young mice.
Authors: R D Brady; B L Grills; T Romano; J D Wark; T J O'Brien; S R Shultz; S J McDonald Journal: J Musculoskelet Neuronal Interact Date: 2016-12-14 Impact factor: 2.041
Authors: Quante Singleton; Kumar Vaibhav; Molly Braun; Chandani Patel; Andrew Khayrullin; Bharati Mendhe; Byung R Lee; Ravindra Kolhe; Helen Kaiser; Mohamed E Awad; Tunde Fariyike; Ranya Elsayed; Mohammed Elsalanty; Carlos M Isales; Yutao Liu; Mark W Hamrick; Krishnan M Dhandapani; Sadanand Fulzele Journal: Cells Date: 2019-01-17 Impact factor: 6.600
Authors: Nikita M Bajwa; Shina Halavi; Mary Hamer; Bridgette D Semple; Linda J Noble-Haeusslein; Mohsen Baghchechi; Alex Hiroto; Richard E Hartman; André Obenaus Journal: PLoS One Date: 2016-01-21 Impact factor: 3.240