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On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
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Differential bone metabolism and protein expression in mice fed a high-fat diet versus Daurian ground squirrels following natural pre-hibernation fattening
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Abstract: This study compared the effects on bone metabolism and morphology of pathological obesity induced by excessive fat intake in a non-hibernator (mice) versus healthy obesity due to pre-hibernation fattening in a hibernator (ground squirrels). Kunming mice were fed a high-fat diet to provide a model of pathological obesity (OB group). Daurian ground squirrels fattened naturally in their pre-hibernation season (PRE group) were used as a healthy obesity model. Micro-computed tomography (micro-CT) and three-point bending tests were used to determine the microstructure and mechanical properties of bone. Western blots were used to analyze protein expression levels related to bone metabolism (Runt-related transcription factor 2 (RunX2), osteocalcin (OCN), alkaline phosphatase (ALP), osteoprotegerin (OPG), receptor activator of nuclear factor-κB ligand (RANKL), cathepsin K, matrix metallopeptidase 9 (MMP9), patched protein homolog 1 (Ptch1), phosphorylated β-catenin (P-β-catenin), and glycogen synthase kinase-3β(GSK-3β)). Compared with controls, there was no obvious bone loss in the OB mice, and the stiffness of the femur was increased significantly. Compared with summer active squirrels, bone formation was enhanced but the mechanical properties did not change in the PRE group squirrels. In OB mice, western blots showed significantly increased expression levels of all proteins except RunX2, OPG, and Ptch1. PRE ground squirrels showed significantly increased expression of most proteins except OCN and Ptch1, which decreased significantly, and P-β-catenin and OPG, which did not change. In conclusion, for non-hibernating mice, moderate obesity had a certain protective effect on bones, demonstrating two-way regulation, increasing both bone loss and bone formation. For pre-hibernating ground squirrels, the healthy obesity acquired before hibernation had a positive effect on the microstructure of bones, and also enhanced the expression levels of proteins related to bone formation, bone resorption, and wnt signaling.
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Xuli GAO, Shenyang SHEN, Qiaohua NIU, Weilan MIAO, Yuting HAN, Ziwei HAO, Ning AN, Yingyu YANG, Yu ZHANG, Han ZHANG, Kenneth B. STOREY, Hui CHANG. Differential bone metabolism and protein expression in mice fed a high-fat diet versus Daurian ground squirrels following natural pre-hibernation fattening[J]. Journal of Zhejiang University Science B, 2022, 23(12): 1042-1056.
@article{title="Differential bone metabolism and protein expression in mice fed a high-fat diet versus Daurian ground squirrels following natural pre-hibernation fattening",
author="Xuli GAO, Shenyang SHEN, Qiaohua NIU, Weilan MIAO, Yuting HAN, Ziwei HAO, Ning AN, Yingyu YANG, Yu ZHANG, Han ZHANG, Kenneth B. STOREY, Hui CHANG",
journal="Journal of Zhejiang University Science B",
volume="23",
number="12",
pages="1042-1056",
year="2022",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B2100798"
}
%0 Journal Article
%T Differential bone metabolism and protein expression in mice fed a high-fat diet versus Daurian ground squirrels following natural pre-hibernation fattening
%A Xuli GAO
%A Shenyang SHEN
%A Qiaohua NIU
%A Weilan MIAO
%A Yuting HAN
%A Ziwei HAO
%A Ning AN
%A Yingyu YANG
%A Yu ZHANG
%A Han ZHANG
%A Kenneth B. STOREY
%A Hui CHANG
%J Journal of Zhejiang University SCIENCE B
%V 23
%N 12
%P 1042-1056
%@ 1673-1581
%D 2022
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B2100798
TY - JOUR
T1 - Differential bone metabolism and protein expression in mice fed a high-fat diet versus Daurian ground squirrels following natural pre-hibernation fattening
A1 - Xuli GAO
A1 - Shenyang SHEN
A1 - Qiaohua NIU
A1 - Weilan MIAO
A1 - Yuting HAN
A1 - Ziwei HAO
A1 - Ning AN
A1 - Yingyu YANG
A1 - Yu ZHANG
A1 - Han ZHANG
A1 - Kenneth B. STOREY
A1 - Hui CHANG
J0 - Journal of Zhejiang University Science B
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IS - 12
SP - 1042
EP - 1056
%@ 1673-1581
Y1 - 2022
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B2100798
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