RESEARCH PAPER
Bone losses in obese, ovariectomized rats appear to be independent from sclerostin-induced inhibition of the Wnt/β-catenin pathway
 
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1
Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences, Lublin, Poland
 
2
Department of Gastroenterology of Clinical Hospital 2, University of Rzeszow, Poland
 
3
Department of Endoscopy, Institute of Rural Health, Lublin, Poland
 
4
Department of Orthopaedics and Traumatology, Medical University, Lublin, Poland
 
5
Chair of Oncology and Environmental Health Care, Faculty of Health Sciences, Medical University, Lublin, Poland
 
 
Corresponding author
Marek Bieńko   

Department of Animal Physiology, Faculty of Veterinary Medicine,University of Life Sciences in Lublin, Poland, Akademicka 12, 20-950, Lublin
 
 
Ann Agric Environ Med. 2020;27(3):394-400
 
KEYWORDS
TOPICS
ABSTRACT
Introduction:
Overweight and obesity, as well as a gonadal function, are pivotal factors influencing bone tissue metabolism.

Material and methods:
The aim of the study was to determine the effect of dietary induced obesity (DIO) on bone tissue metabolism in sham-operated (SHO) or ovariectomized (OVX) adult female Wistar rats. Additionally, the influence of DIO in SHO or OVX on the concentration of sclerostin in the blood serum was analyzed. After SHO or OVX, the rats were placed in groups (n=8) and either received a standard diet (11.5 MJ/kg) (SHO-CON; OVX-CON) or a high-energy diet (17.6 MJ/kg) (SHO-FAT; OVX-FAT). The experiment lasted for 90 days and allowed for the establishment of osteopenia in OVX females and obesity in the rats that had received the high-energy diet.

Results:
The results of the study demonstrate that obesity or/and ovariectomy increases the resorption of femora and tibiae, hence decreasing the densitometric and mechanical parameters affecting the bone structure in adult females rats. The strongest osteodegenerative effect was seen in the OVX-FAT females. Interestingly, the degree of bone tissue degradation caused exclusively by ovariectomy was similar to that found in the obese sham-operated rats.

Conclusions:
Bone losses invoked by DIO seem to be independent from the Wnt/β-catenin pathway inhibition induced by sclerostin. While further study is necessary, the obtained results suggest that the usage of sclerostin anti-body in the treatment of osteoporosis can be ineffective, and in obese patients the undertaking of such therapy should be reassessed.

 
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