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자료유형
학술저널
저자정보
Nathan Robert Wanderman (Orthopedic Surgery Mayo Clinic Rochester MN US) Cindy Mallet (Division of Orthopedic Research Rochester MN USA) Hugo Giambini (Division of Orthopedic Research Rochester MN US) Nirong Bao (Division of Orthopedic Research Rochester MN US) Chunfeng Zhao (Division of Orthopedic Research Rochester MN US) Kai-Nan An (Division of Orthopedic Research Rochester MN US) Brett A. Freedman (Orthopedic Surgery Mayo Clinic Rochester MN US) Ahmad Nassr (Orthopedic Surgery Mayo Clinic Rochester MN US)
저널정보
대한척추외과학회 Asian Spine Journal Asian Spine Journal Vol.12 No.1
발행연도
2018.1
수록면
12 - 17 (6page)

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Study Design: Experimental Animal Model. Purpose: The aim of our study was to validate a pure bilateral ovariectomy (OVX) female New Zealand white rabbit model of postmenopausal osteoporosis utilizing animal-sparing in vivo techniques for evaluating bone mineral density (BMD). We also sought to demonstrate that bilateral OVX in female New Zealand white rabbits can produce diminished BMD in the spinal column and simulate osteoporosis, without the need for adjuvant chemotherapeutic agents (i.e., no additional glucocorticosteroids or other drugs were used for stimulating accelerated BMD loss), which can be assessed by in vivo BMD testing. Overview of Literature: Multiple animal models of postmenopausal osteoporosis have been described. Rat ovariectomy models have been successful, but are limited by rats’ inability to achieve true skeletal maturity and a slight morphology that limits surgical instrumentation. Rabbit models have been described which do not have these limitations, but previous models have relied on adjunctive steroid therapy to achieve osteoporosis and have required animal sacrifice for bone mineral density assessment. Methods: Thirty-six skeletally mature female rabbits underwent bilateral OVX. BMD was measured using dual-energy X-ray absorptiometry on the metaphysis of the proximal tibia and distal femur, at baseline and 17 weeks postoperatively. Results: Mean BMD values were significantly reduced by 21.9% (p <0.05) in the proximal tibia and 11.9% (p <0.001) in the distal femur at 17 weeks. Conclusions: This study is the first to demonstrate a significant bone loss within four months of pure OVX in rabbits using animalsparing validation techniques. We believe that this OVX model is safe, reproducible, and can be employed to longitudinally evaluate the effect of anti-osteoporosis therapeutics and surgical interventions.

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