title: Decreased bone mass and strength in ovariectomized cynomolgus monkeys (Macaca fascicularis).
abstract: Agents for prevention or treatment of osteoporosis must now be tested in a large animal species that exhibits bone remodeling. Ovariectomized, nonhuman primates provide one such model, and they consistently develop osteopenia accompanied by high bone turnover rates. The goal of this study was to further characterize this model, and particularly to determine the effect of ovariectomy on bone strength in vertebrae and femoral necks. Longitudinal evaluations of spinal bone mass and serum markers of bone turnover were performed in 19 sham-ovariectomized (SHAM) and 18 ovariectomized (OVX), domestically reared cynomolgus monkeys, aged > 9 years. OVX monkeys lost bone relative to both baseline values and SHAM controls. Serum markers of bone turnover were increased by OVX. After 72 weeks, both vertebral bone compressive strength and femoral neck breaking strength were significantly decreased in OVX animals compared with SHAM. Ovariectomized cynomolgus monkeys, like postmenopausal women, develop accelerated bone loss, increased bone turnover, and reduced bone strength, and provide a suitable large animal model for efficacy studies with agents for prevention or treatment of osteoporosis.
authors.affiliation: Department of Comparative Medicine, Bowman Gray School of Medicine, Winston-Salem, North Carolina 27157-1040, USA.
authors.forename: C P
authors.initials: CP
authors.lastname: Jerome
authors.forename: C H
authors.initials: CH
authors.lastname: Turner
authors.forename: C J
authors.initials: CJ
authors.lastname: Lees
mesh_terms: D000469:Alkaline Phosphatase / Q000097:blood; D000818:Animals; D015415:Biomarkers / Q000097:blood; D001696:Biomechanical Phenomena; D001835:Body Weight; D015519:Bone Density / Q000502:physiology*; D004195:Disease Models, Animal; D004967:Estrogens / Q000172:deficiency*; D005260:Female; D005272:Femur Neck / Q000000981:diagnostic imaging / Q000502:physiology*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology / Q000502:physiology*; D008253:Macaca mulatta; D009929:Organ Size; D015675:Osteocalcin / Q000097:blood; D010024:Osteoporosis / Q000473:pathology / Q000503:physiopathology*; D010052:Ovariectomy; D011877:Radionuclide Imaging; D013718:Tensile Strength / Q000502:physiology
chemical_list: D015415:Biomarkers; D004967:Estrogens; D015675:Osteocalcin; D000469:Alkaline Phosphatase