OBJECTIVE: This study describes a method for inducing osteopenia using bilateral ovariectomy (OVX), which causes significant changes in bone mineral density (BMD) in rats. METHODS: Twenty-five 10-week-old female Sprague Dawley rats were used. Five rats were euthanized after two weeks, and BMD was measured in their femora. The other 20 rats were assigned to one of two groups : a sham group (n = 10), which underwent a sham operation, and an OVX group (n = 10), which underwent bilateral OVX at 12 weeks of age. After six weeks, five rats from each group were euthanized, and BMD was measured in their femora. The same procedures were performed in the remaining rats form each group eight weeks later. RESULTS: The femur BMD was significantly lower in the six-week OVX group than in the six-week sham group, and in the eight-week OVX group than in the eight-week sham group. CONCLUSION: Bilateral OVX is a safe method for creating an osteopenic rat model. The significant decrease in BMD appears six weeks after bilateral OVX.
OBJECTIVE: This study describes a method for inducing osteopenia using bilateral ovariectomy (OVX), which causes significant changes in bone mineral density (BMD) in rats. METHODS: Twenty-five 10-week-old female Sprague Dawley rats were used. Five rats were euthanized after two weeks, and BMD was measured in their femora. The other 20 rats were assigned to one of two groups : a sham group (n = 10), which underwent a sham operation, and an OVX group (n = 10), which underwent bilateral OVX at 12 weeks of age. After six weeks, five rats from each group were euthanized, and BMD was measured in their femora. The same procedures were performed in the remaining rats form each group eight weeks later. RESULTS: The femur BMD was significantly lower in the six-week OVX group than in the six-week sham group, and in the eight-week OVX group than in the eight-week sham group. CONCLUSION: Bilateral OVX is a safe method for creating an osteopenicrat model. The significant decrease in BMD appears six weeks after bilateral OVX.
Entities:
Keywords:
Animal model; Osteoporosis; Ovariectomy; Rat
Authors: Ronald A Lehman; Timothy R Kuklo; Brett A Freedman; Jerry R Cowart; Mark G Mense; K Daniel Riew Journal: Spine J Date: 2004 Jan-Feb Impact factor: 4.166
Authors: Vanessa D Sherk; Matthew R Jackman; Janine A Higgins; Erin D Giles; Rebecca M Foright; David M Presby; R Dana Carpenter; Ginger C Johnson; Robera Oljira; Julie A Houck; Paul S Maclean Journal: Med Sci Sports Exerc Date: 2019-12 Impact factor: 5.411