title: Counter-effect of constrained dynamic loading on osteoporosis in ovariectomized mice.
abstract: In recent years, dynamic mechanical loading has been shown to effectively enhance bone remodeling. The current study attempted to research the counter-effect of constrained dynamic loading on osteoporosis (OP) in ovariectomized (OVX) mice. Female Kunming (KM) mice were randomly divided into 2 groups: SHAM and OVX. The right ulnas of the OVX mice were subjected to a 4-week constrained dynamic loading protocol, and the mechanical properties, trabecular micromorphology parameters and biochemical indices of osteogenesis were evaluated. We detected higher levels of tissue alkaline phosphatase (AKP) and serum bone gamma-carboxyglutamic-acid-containing proteins (BGPs), better trabecular micromorphology parameters and ulnar mechanical properties in the loading group than in the nonloading group. In summary, constrained dynamic loading could prevent ovariectomy-induced osteoporosis by facilitating osteogenesis, improving trabecular microstructure and enhancing bone mechanical properties.
authors.affiliation: Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Li
authors.forename: Rui-Xin
authors.initials: RX
authors.lastname: Li
authors.forename: Zong-Ming
authors.initials: ZM
authors.lastname: Wan
authors.forename: Cheng
authors.initials: C
authors.lastname: Xu
authors.forename: Jian-Yu
authors.initials: JY
authors.lastname: Li
authors.forename: Qing-Xin
authors.initials: QX
authors.lastname: Hao
authors.forename: Yong
authors.initials: Y
authors.lastname: Guo
authors.forename: Lu
authors.initials: L
authors.lastname: Liu
authors.forename: Xi-Zheng
authors.initials: XZ
authors.lastname: Zhang
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism*; D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D001842:Bone and Bones / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D005260:Female; D051379:Mice; D015675:Osteocalcin / Q000378:metabolism*; D010012:Osteogenesis; D010024:Osteoporosis / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D010052:Ovariectomy; D016474:Weight-Bearing
chemical_list: D015415:Biomarkers; D015675:Osteocalcin; D000469:Alkaline Phosphatase