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Erschienen in: Journal of Bone and Mineral Metabolism 3/2018

17.05.2017 | Original Article

A high-fat diet can affect bone healing in growing rats

verfasst von: Jéssica Suzuki Yamanaka, Gabriela Rezende Yanagihara, Bruna Leonel Carlos, Júnia Ramos, Brígida Batista Brancaleon, Ana Paula Macedo, João Paulo Mardegan Issa, Antônio Carlos Shimano

Erschienen in: Journal of Bone and Mineral Metabolism | Ausgabe 3/2018

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Abstract

A high-fat diet (HFD) can have a negative effect on bone quality in young and old people. Although bone healing in children is normally efficient, there is no evidence that children who have a diet rich in fat have compromised bone fracture regeneration compared with children with recommended dietary fat levels. The purpose of the present study was to evaluate the effects of an HFD on bone healing in growing female rats. Twenty-six postweaning female Wistar rats were divided into two groups (13 animals per group): a standard diet (SD) group and an HFD (with 60% of energy from fat) group. The rats received the assigned diets for 5 weeks, and in the third week they were submitted to an osteotomy procedure of the left tibia. Body mass and feed intake were recorded during the experiment. One day before euthanasia, an insulin tolerance test was performed. After euthanasia, the tibiae were removed and analyzed by densitometry, mechanical testing, histomorphometry, stereology and immunohistochemistry. An HFD caused an adaptive response to maintain energetic balance by decreasing feed intake and causing insulin insensitivity. There was no change in bone mineral density, collagen amount and immunostaining for bone formation, but maximal load and stiffness were decreased in the HFD group. In addition, bone volume had a tendency to be higher in the SD group than in the HFD group. Compared with rats receiving an SD, growing rats receiving an HFD for 5 weeks had similar bone mineral density but altered mechanical properties at the osteotomy defect site.
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Metadaten
Titel
A high-fat diet can affect bone healing in growing rats
verfasst von
Jéssica Suzuki Yamanaka
Gabriela Rezende Yanagihara
Bruna Leonel Carlos
Júnia Ramos
Brígida Batista Brancaleon
Ana Paula Macedo
João Paulo Mardegan Issa
Antônio Carlos Shimano
Publikationsdatum
17.05.2017
Verlag
Springer Japan
Erschienen in
Journal of Bone and Mineral Metabolism / Ausgabe 3/2018
Print ISSN: 0914-8779
Elektronische ISSN: 1435-5604
DOI
https://doi.org/10.1007/s00774-017-0837-4

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