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Sex differences in systemic bone and muscle loss following femur fracture in mice.
Osipov, Benjamin; Paralkar, Manali P; Emami, Armaun J; Cunningham, Hailey C; Tjandra, Priscilla M; Pathak, Suraj; Langer, Henning T; Baar, Keith; Christiansen, Blaine A.
Afiliación
  • Osipov B; Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California, USA.
  • Paralkar MP; Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California, USA.
  • Emami AJ; Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California, USA.
  • Cunningham HC; Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California, USA.
  • Tjandra PM; Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, California, USA.
  • Pathak S; Department of Neurobiology, Physiology and Behavior, University of California Davis, Davis, California, USA.
  • Langer HT; Department of Physiology and Membrane Biology, University of California Davis, Davis, California, USA.
  • Baar K; Department of Neurobiology, Physiology and Behavior, University of California Davis, Davis, California, USA.
  • Christiansen BA; Department of Physiology and Membrane Biology, University of California Davis, Davis, California, USA.
J Orthop Res ; 40(4): 878-890, 2022 04.
Article en En | MEDLINE | ID: mdl-34081357
Fracture induces systemic bone loss in mice and humans, and a first (index) fracture increases the risk of future fracture at any skeletal site more in men than women. The etiology of this sex difference is unknown, but fracture may induces a greater systemic bone loss response in men. Also sex differences in systemic muscle loss after fracture have not been examined. We investigated sex differences in systemic bone and muscle loss after transverse femur fracture in 3-month-old male and female C57BL/6 J mice. Whole-body and regional bone mineral content and density (BMC and BMD), trabecular and cortical bone microstructure, muscle contractile force, muscle mass, and muscle fiber size were quantified at multiple time points postfracture. Serum concentrations of inflammatory cytokines (IL-1ß, IL-6, and TNF-α) were measured 1-day postfracture. One day postfracture, IL-6 and Il-1B were elevated in fracture mice of both sexes, but TNF-α was only elevated in male fracture mice. Fracture reduced BMC, BMD, and trabecular bone microstructural properties in both sexes 2 weeks postfracture, but declines were greater in males. Muscle contractile force, mass, and fiber size decreased primarily in the fractured limb at 2 weeks postfracture and females showed a trend toward greater muscle loss. Bone and muscle properties recovered by 6 weeks postfracture. Overall, postfracture systemic bone loss is greater in men, which may contribute to sex differences in subsequent fracture risk. In both sexes, muscle loss is primarily confined to the injured limb and fracture may induce greater inflammation in males.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedades Óseas Metabólicas / Caracteres Sexuales / Fracturas del Fémur Límite: Animals Idioma: En Revista: J Orthop Res Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Enfermedades Óseas Metabólicas / Caracteres Sexuales / Fracturas del Fémur Límite: Animals Idioma: En Revista: J Orthop Res Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos