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Cholewińska E, Sołek P, Juśkiewicz J, Fotschki B, Dworzański W, Ognik K. Chromium nanoparticles improve bone turnover regulation in rats fed a high-fat, low-fibre diet. PLoS One 2024; 19:e0300292. [PMID: 38718051 PMCID: PMC11078379 DOI: 10.1371/journal.pone.0300292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 02/24/2024] [Indexed: 05/12/2024] Open
Abstract
The aim of the study was to investigate the effect of returning to a balanced diet combined with chromium picolinate (CrPic) or chromium nanoparticles (CrNPs) supplementation at a pharmacologically relevant dose of 0.3 mg/kg body weight on the expression level of selected genes and bone turnover markers in the blood and bones of rats fed an obese diet. The results of the study showed that chronic intake of a high-fat obesogenic diet negatively affects bone turnover by impairing processes of both synthesis and degradation of bones. The switch to a healthy diet proved insufficient to regulate bone metabolism disorders induced by an obesogenic diet, even when it was supplemented with chromium, irrespective of its form. Supplementation with CrPic with no change in diet stimulated bone metabolism only at the molecular level, towards increased osteoclastogenesis (bone resorption). In contrast, CrNPs added to the high-fat diet effectively regulated bone turnover by increasing both osteoblastogenesis and osteoclastogenesis, with these changes directed more towards bone formation. The results of the study suggest that unfavourable changes in bone metabolism induced by chronic intake of a high-fat diet can be mitigated by supplementation with CrNPs, whereas a change in eating habits fails to achieve a similar effect.
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Affiliation(s)
- Ewelina Cholewińska
- Faculty of Animal Sciences and Bioeconomy, Department of Biochemistry and Toxicology, University of Life Sciences in Lublin, Lublin, Poland
| | - Przemysław Sołek
- Faculty of Animal Sciences and Bioeconomy, Department of Biochemistry and Toxicology, University of Life Sciences in Lublin, Lublin, Poland
| | - Jerzy Juśkiewicz
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Bartosz Fotschki
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Wojciech Dworzański
- Chair and Department of Human Anatomy, Medical University of Lublin, Lublin, Poland
| | - Katarzyna Ognik
- Faculty of Animal Sciences and Bioeconomy, Department of Biochemistry and Toxicology, University of Life Sciences in Lublin, Lublin, Poland
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Yavuz MC, Guler R, Ozcan EC, Bozoglan A, Kirtay M, Kaya CA, Dundar S. The Investigation of Bone-Implant Connection and New Bone Formation in Fasting and High-Fatty Diet Rats. Niger J Clin Pract 2024; 27:95-101. [PMID: 38317041 DOI: 10.4103/njcp.njcp_530_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 12/18/2023] [Indexed: 02/07/2024]
Abstract
BACKGROUND Hyperlipidemia caused by a high-fat diet (HFD) has many adverse effects on the cardiovascular system, including vascular problems. In addition, a HFD also has significant adverse effects on bone health. AIM The aim of this study is to examine bone-implant osteointegration and new bone formation in peri-implant defects in fasting and high-fatty diet applied rats. MATERIALS AND METHODS In this study, 28 female Sprague Dawley rats were used. The rats were divided into four groups, with seven rats in each group: the control group on a normal diet (Group 1) (n = 7), the fasted group (Group 2) (n = 7), the high-fatty diet (HFD) group (Group 3) (n = 7), and the fasted and HFD group (Group 4) (n = 7). Titanium implants with a diameter of 2.5 mm and a length of 4 mm were placed in the right tibia bones of the subjects, and a bone graft corresponding to 2 mm of the implant length was placed in the bone defect applied to the neck region. All rats that continued the administered diet for 12 weeks were sacrificed at the end of the experiment period. The implants and surrounding bone tissue were surgically removed and subjected to biomechanical analysis to assess bone-implant osteointegration and peri-implant new bone formation. RESULTS It was determined that there was no statistically significant difference between the rats in the control group and the other three groups in terms of bone-implant osteointegration and peri-implant new bone formation (P > 0.05). CONCLUSION As a result of this study, it was determined that fasting or maintaining a HFD does not adversely affect bone-implant osteointegration or peri-implant new bone formation in the tibias of rats.
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Affiliation(s)
- M C Yavuz
- Department of Periodontology, Faculty of Dentistry, Medeniyet University, Istanbul, Turkey
| | - R Guler
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey
| | - E C Ozcan
- Department of Esthetic, Plastic and Reconstructive Surgery, Faculty of Medicine, Firat University, Elazig, Turkey
| | - A Bozoglan
- Department of Periodontology, Faculty of Dentistry, Firat University, Elazig, Turkey
| | - M Kirtay
- Private Practice, Oral and Maxillofacial Surgery, London, Ontario, Canada
| | - C A Kaya
- Department of Vegetable and Animal Production/Milk and Fattening, Faculty of Diyarbakir Agricultural Vocational School, Dicle University, Diyarbakir, Turkey
| | - S Dundar
- Department of Periodontology, Faculty of Dentistry, Firat University, Elazig, Turkey
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Smith N, Shirazi S, Cakouros D, Gronthos S. Impact of Environmental and Epigenetic Changes on Mesenchymal Stem Cells during Aging. Int J Mol Sci 2023; 24:ijms24076499. [PMID: 37047469 PMCID: PMC10095074 DOI: 10.3390/ijms24076499] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/22/2023] [Accepted: 03/28/2023] [Indexed: 03/31/2023] Open
Abstract
Many crucial epigenetic changes occur during early skeletal development and throughout life due to aging, disease and are heavily influenced by an individual’s lifestyle. Epigenetics is the study of heritable changes in gene expression as the result of changes in the environment without any mutation in the underlying DNA sequence. The epigenetic profiles of cells are dynamic and mediated by different mechanisms, including histone modifications, non-coding RNA-associated gene silencing and DNA methylation. Given the underlining role of dysfunctional mesenchymal tissues in common age-related skeletal diseases such as osteoporosis and osteoarthritis, investigations into skeletal stem cells or mesenchymal stem cells (MSC) and their functional deregulation during aging has been of great interest and how this is mediated by an evolving epigenetic landscape. The present review describes the recent findings in epigenetic changes of MSCs that effect growth and cell fate determination in the context of aging, diet, exercise and bone-related diseases.
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Affiliation(s)
- Nicholas Smith
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
| | - Suzanna Shirazi
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
| | - Dimitrios Cakouros
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
- Correspondence: (D.C.); (S.G.); Tel.: +61-8-8128-4395 (S.G.)
| | - Stan Gronthos
- Mesenchymal Stem Cell Laboratory, School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, SA 5001, Australia
- Precision Medicine Theme, South Australian Health and Medical Research Institute, Adelaide, SA 5001, Australia
- Correspondence: (D.C.); (S.G.); Tel.: +61-8-8128-4395 (S.G.)
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Gao S, Qian X, Huang S, Deng W, Li Z, Hu Y. Association between macronutrients intake distribution and bone mineral density. Clin Nutr 2022; 41:1689-1696. [PMID: 35777108 DOI: 10.1016/j.clnu.2022.05.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/05/2022] [Accepted: 05/19/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND & AIMS Although it is well known dietary factors are closely correlated with bone health, the association between macronutrients intake distribution and bone mineral density (BMD) is still unclear. The aims of this study were to investigate how macronutrients distribution was correlated with BMD, and to evaluate how the substitution between macronutrients could be associated with BMD. METHODS We conducted a cross-sectional study based on data from National Health and Nutrition Examination Survey. Dietary recall method was used to assessed the intake of macronutrients. Macronutrient intake distribution including carbohydrate, protein and fat was calculated as percentages of energy intake from total energy. BMD was converted to T-score and low BMD was defined as T-score less than -1.0. The association between the percentages of energy intake from carbohydrate, protein and fat with T-score and risk of low BMD was evaluated using multivariate regression models. Isocaloric substitution analysis was conducted using the multivariate nutrient density method. RESULTS Data form 4447 adults aged 20 years and older who underwent BMD examination were included in this study. Higher percentage of energy intake from carbohydrate was associated with lower T-score (-0.03 [95%CI, -0.05 to -0.01]; P = 0.001) and higher risk of low BMD (1.05 [95%CI, 1.02-1.08]; P = 0.003), while higher percentage of energy intake from protein was associated with higher T-score (0.05 [95%CI, 0.01-0.08]; P = 0.009) and lower odds of low BMD (0.92 [95%CI, 0.87-0.98]; P = 0.007). The percentage of energy intake from fat seemed to be positively correlated with T-score, but the correlation became insignificant after adjusting for metabolism related confounders. Isocaloric substitution analysis showed that only the substitution between carbohydrate and protein was significantly and independently associated with T-score (-0.05 [95%CI, -0.08 to -0.01]; P = 0.01) and the risk of low BMD (1.08 [95%CI, 1.02-1.15]; P = 0.008). CONCLUSIONS Based on the results from this study, we hypothesized that a high-protein diet coupled with low carbohydrate intake would be beneficiary for prevention of bone loss in adults. However, randomized clinical trials or longitudinal studies are needed to further assessed our findings.
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Affiliation(s)
- Shihua Gao
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xin Qian
- Guangzhou University of Chinese Medicine, Guangzhou, China; Department of Traditional Therapy, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Sicong Huang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wanxi Deng
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhe Li
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yingyu Hu
- Department of Hospital Management, Southern Medical University, Guangzhou, China.
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Li H, Gou Y, Tian F, Zhang Y, Lian Q, Hu Y, Zhang L. Combination of metformin and exercise alleviates osteoarthritis in ovariectomized mice fed a high-fat diet. Bone 2022; 157:116323. [PMID: 34990878 DOI: 10.1016/j.bone.2021.116323] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 12/10/2021] [Accepted: 12/28/2021] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To evaluate and compare the effects of the combined intervention of metformin and exercise on the degeneration of cartilage and subchondral bone in a mouse model of osteoarthritis (OA) induced by estrogen deficiency and obesity. METHODS 56 female 3-month-old C57BL/6 mice underwent ovariectomy (OVX) (n = 40) or a sham operation (n = 16) and were randomized into seven groups (n = 8/group): 1) sham-operated mice with a normal diet (Sham), 2) OVX mice with a normal diet (OVX), 3) sham-operated mice with high-fat diet (HFD) (HSVX), 4) OVX mice with HFD (HOVX), 5) OVX mice with HFD + exercise (HOVE), 6) OVX mice with HFD + metformin (HOMX), and 7) OVX mice with HFD + metformin + exercise (HOME). Drug administration and exercise training were initiated 72 h after surgical operation. The pathology of OA was assessed by histomorphology analyses, immunohistochemistry (IHC), tartrate-resistant acid phosphatase (TRAP) staining, micro-computed tomography and enzyme-linked immunosorbent assay (ELISA). RESULTS Histomorphological analysis revealed that OA was significantly exacerbated by the coexistence of estrogen deficiency and obesity and markedly alleviated by the combined intervention. In details, metformin plus exercise ameliorated the abnormal metabolic status and cartilage lesions, significantly increased aggrecan and collagen-II expression and decreased the expression of ADAMTS-4. Furthermore, combined intervention markedly improved bone degeneration, bone mass and microarchitecture of subchondral bone. And the intervention also increased the concentration of OCN and decreased the serum concentration of IL-1β and CTX-1 and glucose. CONCLUSIONS The coexistence of estrogen deficiency and obesity further aggravates abnormal metabolic pathology and articular degeneration, which could be prevented by the combination with metformin and exercise, suggesting that combined intervention may be a potential candidate for amelioration of the progression of OA.
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Affiliation(s)
- Hetong Li
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, PR China.
| | - Yu Gou
- Department of Orthopaedic Surgery, Tianjin Hospital, Tianjin University, Tianjin, PR China.
| | - Faming Tian
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, PR China.
| | - Ya Zhang
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, PR China
| | - Qiangqiang Lian
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, PR China
| | - Yunpeng Hu
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, PR China
| | - Liu Zhang
- Department of Orthopedic Surgery, Hebei Medical University, Shijiazhuang, Hebei, PR China.
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Sun T, Xing HL, Chen ZZ, Tao ZS, Li J. Simvastatin reverses the harmful effects of high fat diet on titanium rod osseointegration in ovariectomized rats. J Bone Miner Metab 2021; 39:944-951. [PMID: 34189660 DOI: 10.1007/s00774-021-01243-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 05/31/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The objectives of the present study were to determine whether simvastatin (SIM) could reverse the harmful effects on titanium rod osseointegration in ovariectomized rats fed high-fat diet (HFD). MATERIALS AND METHODS Ovariectomized female Sprague-Dawley rats were randomly allocated to three groups and received SIM treatment plus HFD for 12 weeks. We then evaluated the microstructure parameters, histological parameters, biomechanical parameters, bone turnover, and blood lipid level. RESULTS After 12 weeks of treatment, SIM can significantly improve bone formation around the titanium rod and osseointegration including higher values of maximum push-out force, bone area ratio (BAR), bone-to-implant contact (BIC), bone mineral density (BMD), bone volume (BV/TV), trabecular number (Tb.N), trabecular thickness (Tb.Th), mean connective density (Conn.D) when compared with the HFD group. In addition, system administration of SIM showed positive effects on collagen type 1 cross-linked C-telopeptide (CTX-1), procollagen I N-terminal propeptide (PINP), total cholesterol (TC), triglycerides (TGL), low-density lipoprotein (LDL) cholesterol and high-density lipoprotein (HDL) cholesterol. Compared with the HFD group, lower values of CTX-1, P1NP, TC, TGL and LDL were observed in the SIM+HFD group (P < 0.05). CONCLUSION Our findings revealed that HFD may have an adverse effect on osseointegration in osteoporotic conditions, and the harmful effect of HFD on osseointegration could be reversed by SIM.
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Affiliation(s)
- Tao Sun
- Department of Orthopedics, The Fifth Affiliated Hospital Lishui Municipal Central Hospital, Wenzhou Medical University, Lishui, Zhejiang, People's Republic of China
| | - Hai-Lin Xing
- Department of Orthopedics, The Fifth Affiliated Hospital Lishui Municipal Central Hospital, Wenzhou Medical University, Lishui, Zhejiang, People's Republic of China
| | - Zhen-Zhong Chen
- Department of Orthopedics, The Fifth Affiliated Hospital Lishui Municipal Central Hospital, Wenzhou Medical University, Lishui, Zhejiang, People's Republic of China
| | - Zhou-Shan Tao
- Department of Trauma Orthopedics, The First Affiliated Hospital of Wannan Medical College, Yijishan Hospital, Wuhu, Anhui, People's Republic of China
| | - Jian Li
- Department of Orthopedics, The Fifth Affiliated Hospital Lishui Municipal Central Hospital, Wenzhou Medical University, Lishui, Zhejiang, People's Republic of China.
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Calor AK, Yumani DF, van Weissenbruch MM. Early Nutrition during Hospitalization in Relation to Bone Health in Preterm Infants at Term Age and Six Months Corrected Age. Nutrients 2021; 13:nu13041192. [PMID: 33916331 PMCID: PMC8065483 DOI: 10.3390/nu13041192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/26/2021] [Accepted: 03/30/2021] [Indexed: 11/25/2022] Open
Abstract
Aim: to evaluate the potential association of macronutrient intake in the first postnatal weeks on bone mineral content (BMC) and bone mineral density (BMD) in extremely and very preterm infants. Methods: fifty-eight extremely and very preterm infants were included. Daily macronutrient intake was calculated in g kg−1 day−1 from birth up to 36 weeks postmenstrual age. A dual-energy X-ray absorptiometry whole body scan was used to assess BMC and BMD in preterm infants at term corrected age (TCA) and six months corrected age (CA). Results: fat intake (g kg−1 day−1) in the first four postnatal weeks was positively associated with BMC and BMD at TCA. At six months CA, protein and fat intake (g kg−1 day−1) in the first weeks of life were both individual predictors for BMD. Fat intake (g kg−1 day−1) in the first four postnatal weeks was significantly associated with BMC at six months CA. Conclusion: the association of macronutrient intake in the first postnatal weeks on BMC or BMD, at TCA and six months CA, suggest that early nutritional intervention immediately after birth and during early infancy is important for bone health in the first months of life.
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Radzki RP, Bienko M, Wolski D, Ostapiuk M, Polak P, Manastyrska M, Kimicka A, Wolska J. Programming Effect of the Parental Obesity on the Skeletal System of Offspring at Weaning Day. Animals (Basel) 2021; 11:ani11020424. [PMID: 33562167 PMCID: PMC7914703 DOI: 10.3390/ani11020424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 01/01/2023] Open
Abstract
Simple Summary Overweight and obesity can cause many diseases, and several studies indicate a close relationship between the obesity of parents and the health of their offspring. Our aim was to investigate whether there is a programming influence of parental obesity on the skeletal system in weaned female and male offspring rats. In undertaking this, analysis of bone material was carried out using isolated tibia, and densitometry (DXA), peripheral (pQCT) and micro (µCT) computed tomography were performed. Mechanical tests and blood serum biochemistry were also carried out. Our work showed a significant programming influence of parental obesity on neonatal skeletal development. The tibiae isolated from offspring originating from obese parents were characterized by more intense mineralization and higher fracture resistance. However, numerous studies demonstrate the destructive effect of obesity on the skeletal system. Our research and the available literature suggest the existence of a “fat threshold”, the exceeding of which changes of the osteotropic effect of adipose tissue to become unfavorable. Therefore, there is a need for further research to determine the time-dependent metabolic relationship between adipose tissue and bone in both animals and humans. Abstract Our study aimed to verify the hypothesis of the existence of a programming effect of parental obesity on the growth, development and mineralization of the skeletal system in female and male rat offspring on the day of weaning. The study began with the induction of obesity in female and male rats of the parental generation, using a high-energy diet (group F). Females and males of the control group received the standard diet (group S). After 90 days of dietary-induced obesity, the diet in group F was changed into the standard. Rats from groups F and S were mated to obtain offspring which stayed with their mothers until 21 days of age. Tibia was tested using dual-energy X-ray absorptiometry (DXA), peripheral quantitative computed tomography (pQCT), micro-computed tomography (µCT) and mechanical strength using the three-point bending test. Biochemical analysis of blood serum bone metabolism markers was performed. DXA analysis showed higher tibia bone mineral content (BMC) and area. pQCT measurements of cortical and trabecular tissue documented the increase of the volumetric bone mineral density and BMC of both bone compartments in offspring from the F group, while µCT of the trabecular tissue showed an increase in trabecular thickness and a decrease of its separation. Parental obesity, hence, exerts a programming influence on the development of the skeletal system of the offspring on the day of the weaning, which was reflected in the intensification of mineralization and increased bone strength.
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Affiliation(s)
- Radoslaw Piotr Radzki
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-033 Lublin, Poland; (D.W.); (M.M.); (A.K.)
- Correspondence: (R.P.R.); (M.B.); Tel.: +48-81-445-60-69 (R.P.R.); +48-81-445-69-30 (M.B.)
| | - Marek Bienko
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-033 Lublin, Poland; (D.W.); (M.M.); (A.K.)
- Correspondence: (R.P.R.); (M.B.); Tel.: +48-81-445-60-69 (R.P.R.); +48-81-445-69-30 (M.B.)
| | - Dariusz Wolski
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-033 Lublin, Poland; (D.W.); (M.M.); (A.K.)
| | - Monika Ostapiuk
- Department of Materials Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;
| | - Pawel Polak
- St Johns’ Oncology Center in Lublin (COZL) Trauma, Orthopaedic Surgery Department, ul. Jaczewskiego 7, 20-090 Lublin, Poland;
| | - Malgorzata Manastyrska
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-033 Lublin, Poland; (D.W.); (M.M.); (A.K.)
| | - Aleksandra Kimicka
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-033 Lublin, Poland; (D.W.); (M.M.); (A.K.)
| | - Joanna Wolska
- Department of Oncology, Chair of Oncology and Environmental Health, Faculty of Health Sciences, Medical University of Lublin, 20-090 Lublin, Poland;
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Macêdo APA, Cordeiro GS, Santos LS, Santo DAE, Perez GS, Couto RD, Machado MEPC, Medeiros JMB. Murinometric measurements and retroperitoneal adipose tissue in young rats exposed to the high-fat diet: Is there correlation? BRAZ J BIOL 2020; 81:246-250. [PMID: 32428096 DOI: 10.1590/1519-6984.221405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 11/16/2019] [Indexed: 11/22/2022] Open
Abstract
AIM This study aimed to verify the correlation between murine measurements and retroperitoneal adipose tissue in rats exposed to the high-fat diet. Material and methods: Wistar male adult rats, descendants of mothers who consumed a high-fat diet during pregnancy and lactation and fed the same diet after weaning were used. At 60 days of life, body weight, longitudinal axis and waist circumference (WC) were measured. The Body Mass Index (BMI) and the Lee Index were calculated for a posterior analysis of the correlation with the amount of retroperitoneal adipose tissue dissected on the same day. For analysis of the data, the Pearson correlation test was used, considering statistical significance for p <0.05. Results: Body weight had a weak correlation (r= 0.31; p= 0.38) with retroperitoneal adipose tissue. While the longitudinal correlated moderately and negative (r= -0.40; p= 0.25). Abdominal circumference (r= 0.62; p= 0.05), body mass index (r= 0.61; p= 0.03) and Lee (r= 0.69; p= 0.03) correlated moderately and positively with adipose tissue. Conclusion: Among the measured murine measurements, weight and longitudinal axis were not good indicators to represent accumulation of retroperitoneal adipose tissue in rats. However, Lee's index seems to be the best murine marker to diagnose the accumulation of retroperitoneal fat. BMI, CA and Lee index were murine parameters with higher correlation.
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Affiliation(s)
- A P A Macêdo
- Programa de Pós-Graduação em Ciências de Alimentos, Faculdade de Farmácia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, Código Postal , Salvador, BA, Brasil
| | - G S Cordeiro
- Programa de Pós-Graduação em Alimento, Nutrição e Saúde, Escola de Nutrição, Universidade Federal da Bahia, Avenida Araújo Pinho, 32, Canela, Código Postal , Salvador, BA, Brasil
| | - L S Santos
- Programa de Pós-Graduação em Alimento, Nutrição e Saúde, Escola de Nutrição, Universidade Federal da Bahia, Avenida Araújo Pinho, 32, Canela, Código Postal , Salvador, BA, Brasil
| | - D A E Santo
- Programa de Pós-Graduação em Alimento, Nutrição e Saúde, Escola de Nutrição, Universidade Federal da Bahia, Avenida Araújo Pinho, 32, Canela, Código Postal , Salvador, BA, Brasil
| | - G S Perez
- Programa de Pós-Graduação em Alimento, Nutrição e Saúde, Escola de Nutrição, Universidade Federal da Bahia, Avenida Araújo Pinho, 32, Canela, Código Postal , Salvador, BA, Brasil
| | - R D Couto
- Programa de Pós-Graduação em Ciências de Alimentos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal da Bahia, Rua Barão de Jeremoabo, s/n, Ondina, Código Postal , Salvador, BA, Brasil
| | - M E P C Machado
- Programa de Pós-Graduação em Alimento, Nutrição e Saúde, Departamento de Ciências da Nutrição, Escola de Nutrição, Escola de Nutrição, Universidade Federal da Bahia, Avenida Araújo Pinho, 32, Canela, Código Postal , Salvador, BA, Brasil
| | - J M Barreto Medeiros
- Programa de Pós-Graduação em Alimento, Nutrição e Saúde, Departamento de Ciências da Nutrição, Escola de Nutrição, Universidade Federal da Bahia, Avenida Araújo Pinho, 32, Canela, Código Postal , Salvador, BA, Brasil
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Saleh N, Nassef NA, Shawky MK, Elshishiny MI, Saleh HA. Novel approach for pathogenesis of osteoporosis in ovariectomized rats as a model of postmenopausal osteoporosis. Exp Gerontol 2020; 137:110935. [PMID: 32339647 DOI: 10.1016/j.exger.2020.110935] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/10/2020] [Accepted: 03/25/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND Obesity and osteoporosis are two chronic conditions that have been increasing in prevalence. Menopausal transition years place women at high risk for visceral obesity as well as osteoporosis. This study was carried out to elucidate the effect of visceral adiposity on ovariectomy-induced osteoporosis in rats. METHODS We studied female Wistar rats aged 12-14 months, divided into four groups: a) Sham-operated control (SHAM) rats (n = 12), rats were fed a control diet (59% of food intake from carbohydrates, 7% from fat, 21% from protein, 13% from minerals and ash) for 12 weeks, b) High fat diet-fed control (HFD) group (n = 9), rats were fed a high fat diet (49% of food intake from carbohydrates, 17% from fat, 21% from protein, 13% from minerals and ash)for 12 weeks, c) Ovariectomized (OVX) rats (n = 14), rats were fed a control diet as SHAM rats, d) High fat diet- fed ovariectomized (OVX- HFD) rats (n = 13), rats were fed a high fat diet as HFD group. At the end of the experiment, blood samples were collected for calcium, phosphorus, and alkaline phosphatase (ALP) assays. Unilateral left perirenal fats were surgically removed and weighed. Specimens from right perirenal fats and tibia were isolated and processed for histological examination. Histomorphometric analysis of the tibia and visceral adipose tissue was also performed. RESULTS OVX, HFD, and OVX-HFD rats showed a significant increase in relative visceral fat weight, and plasma ALP, and a significant decrease in plasma calcium, and phosphorus levels compared to SHAM rats. Light microscopic examination of the tibia of the OVX rats revealed a significant decrease in the cortical bone thickness (CBT) and the trabecular bone thickness (TBT), and a significant increase in bone marrow adipose tissue compared to SHAM rats. In addition, there was a significant increase in the osteoclast number, and a significant decrease in the osteoblast number. The changes in bone marrow adipose tissue as well as osteoclast number were further accentuated in OVX-HFD groups. CONCLUSIONS Visceral obesity played a crucial role in the development of osteoporosis in ovariectomized rats through effects that might involve both osteoblasts and osteoclasts.
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Affiliation(s)
- NermineK Saleh
- Medical Physiology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
| | - Noha A Nassef
- Medical Physiology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mona K Shawky
- Medical Physiology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Menna I Elshishiny
- Medical Physiology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Hanan A Saleh
- Histology & Cell Biology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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11
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King S, Baptiston Tanaka C, Ross D, Kruzic JJ, Levinger I, Klineberg I, Brennan‐Speranza TC. A diet high in fat and fructose adversely affects osseointegration of titanium implants in rats. Clin Exp Dent Res 2020; 6:107-116. [PMID: 32067396 PMCID: PMC7025982 DOI: 10.1002/cre2.255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 09/02/2019] [Accepted: 09/10/2019] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVES Diet-induced metabolic dysfunction such as type 2 diabetes mellitus increases the risk of implant failure in both dental and orthopaedic settings. We hypothesised that a diet high in fat and fructose would adversely affect peri-implant bone structure and function including osseointegration. MATERIALS AND METHODS Thirty female Sprague-Dawley rats were divided into three groups (n = 10), control group (normal chow) and two intervention groups on a high-fat (60%), high-fructose (20%; HFHF) diet. Titanium implants were placed in the proximal tibial metaphysis in all groups either before commencing the diet (dHFHF group) or 6 weeks after commencing the diet (HFHF group) and observed for an 8-week healing period. Fasting blood glucose levels (fBGLs) were measured weekly. Structural and functional features of the peri-implant bone, including bone-to-implant contact (BIC), were analysed post euthanasia using microcomputed tomography, pull-out tests, and dynamic histomorphometry. RESULTS The fBGLs were unchanged across all groups. Peri-implant trabecular bone volume was reduced in the HFHF group compared with controls (p = .02). Percentage BIC was reduced in both HFHF group (25.42 ± 3.61) and dHFHF group (28.56 ± 4.07) compared with the control group (43.26 ± 3.58, p < .05) and reflected the lower pull-out loads required in those groups. Osteoblast activity was reduced in both intervention groups compared with the control group (p < .05). CONCLUSION The HFHF diet compromised osseointegration regardless of whether the implant was placed before or after the onset of the diet and, despite the absence of elevated fBGLs, confirming that changes in bone cell function affected both the initiation and maintenance of osseointegration independent of blood glucose levels.
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Affiliation(s)
- Shalinie King
- Sydney Dental School, Faculty of Medicine and HealthThe University of SydneySydneyNew South WalesAustralia
| | | | - Dean Ross
- Department of Physiology and Bosch Institute for Medical ResearchThe University of SydneySydneyNew South WalesAustralia
| | - Jamie J. Kruzic
- School of Mechanical and Manufacturing EngineeringUNSW SydneySydneyNew South WalesAustralia
| | - Itamar Levinger
- Institute for Health and Sport (IHES)Victoria UniversityMelbourneVictoriaAustralia
- Australian Institute for Musculoskeletal Science (AIMSS), Department of Medicine‐Western Health, Melbourne Medical SchoolThe University of MelbourneMelbourneVictoriaAustralia
| | - Iven Klineberg
- Sydney Dental School, Faculty of Medicine and HealthThe University of SydneySydneyNew South WalesAustralia
| | - Tara C. Brennan‐Speranza
- Department of Physiology and Bosch Institute for Medical ResearchThe University of SydneySydneyNew South WalesAustralia
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12
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Vaspin antagonizes high fat-induced bone loss in rats and promotes osteoblastic differentiation in primary rat osteoblasts through Smad-Runx2 signaling pathway. Nutr Metab (Lond) 2020; 17:9. [PMID: 31993071 PMCID: PMC6977231 DOI: 10.1186/s12986-020-0429-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 01/15/2020] [Indexed: 02/06/2023] Open
Abstract
Background Visceral adipose tissue-derived serine protease inhibitor (vaspin), an adipose-derived hormone, exhibits various biological functions. Recently, studies showed that vaspin is closely related to bone metabolism. However, how vaspin influences bone formation and its underlying mechanisms in high fat-induced obese rats and rat primary osteoblasts (OBs) are not fully understood. In this study, the effects of vaspin on bone mechanical parameters and microarchitecture were evaluated. Methods A total of 40 male Sprague-Dawley (SD) rats at 5-week old were fed with high fat diet (HFD) and normal diet (ND) for 12 weeks followed by treatment of vaspin for 10 weeks. Micro CT and three-point bending tests were conducted to evaluate bone microstructure and biomechanics. The alkaline phosphatase (ALP) activity, expression of Runt-related transcription factor 2 (Runx2), Osterix (Osx), Collegen alpha1 (Colla1) procollagen I N-terminal peptide (PINP), C-telopeptide of type I collagen (CTX), Smad2/3 and p-Smad2/3 was detected by different methods. Results Our data indicated that, compared with ND rats, HFD rats exhibited high body weight, decreased bone strength and deteriorative bone quality. In contrast, vaspin reduced the body weight, improved the whole body metabolic status, enhanced bone strength, trabecular bone mass, and expression of Runx2, Osx, PINP, and decreased the expression level of plasma CTX. In vitro studies showed that vaspin promoted osteogenic differentiation and ALP activity in rat primary OBs in a dose dependent manner. Vaspin also upregulated mRNA expression of osteogenesis-related genes Runx2, Osx and Colla1 and protein expression of Runx2, Smad2/3 and p-Smad2/3. Conclusions Our results indicated that vaspin protects against HFD-induced bone loss, and promotes osteogenic differentiation by activating the Smad2/3-Runx2 signaling pathway.
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Abstract
PURPOSE OF REVIEW This review addresses recent developments in studies of lipid regulation of calcific disease of arteries and cardiac valves, including the role of nuclear receptors. The role of lipid-soluble signals and their receptors is timely given the recent evidence and concerns that lipid-lowering treatment may increase the rate of progression of coronary artery calcification, which has been long associated with increased cardiovascular risk. Understanding the mechanisms will be important for interpreting such clinical information. RECENT FINDINGS New findings support regulation of calcific vascular and valvular disease by nuclear receptors, including the vitamin D receptor, glucocorticoid receptor, nutrient-sensing nuclear receptors (liver X receptor, farnesoid X receptor, and peroxisome proliferator-activated receptors), and sex hormone (estrogen and androgen) receptors. There were two major unexpected findings: first, vitamin D supplementation, which was previously believed to prevent or reduce vascular calcification, showed no cardiovascular benefit in large randomized, controlled trials. Second, both epidemiological studies and coronary intravascular ultrasound studies suggest that treatment with HMG-CoA reductase inhibitors increases progression of coronary artery calcification, raising a question of whether there are mechanically stable and unstable forms of coronary calcification. SUMMARY For clinical practice and research, these new findings offer new fundamental mechanisms for vascular calcification and provide new cautionary insights for therapeutic avenues.
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Affiliation(s)
- Tamer Sallam
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095-1679
- Department of Physiology, University of California, Los Angeles, Los Angeles, CA 90095-1679
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095-1679
| | - Yin Tintut
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095-1679
- Department of Physiology, University of California, Los Angeles, Los Angeles, CA 90095-1679
- Department of Orthopaedic Surgery, University of California, Los Angeles, Los Angeles, CA 90095-1679
| | - Linda L. Demer
- Department of Medicine, University of California, Los Angeles, Los Angeles, CA 90095-1679
- Department of Physiology, University of California, Los Angeles, Los Angeles, CA 90095-1679
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095-1679
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Minematsu A, Nishii Y, Sakata S. High-fat/high-sucrose diet results in higher bone mass in aged rats. Bone Rep 2018; 8:18-24. [PMID: 29322073 PMCID: PMC5755753 DOI: 10.1016/j.bonr.2018.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 12/01/2017] [Accepted: 01/02/2018] [Indexed: 01/14/2023] Open
Abstract
Intake of high-fat/high-sucrose (HFS) diet or high fat diet influences bone metabolism in young rodents, but its effects on bone properties of aged rodents still remain unclear. This study aimed to examine the effects of HFS diet intake on trabecular bone architecture (TBA) and cortical bone geometry (CBG) in aged rats. Fifteen male Wistar rats over 1 year were randomly divided into two groups. One group was fed a standard laboratory diet (SLD) and the other group was fed a HFS diet for six months. The femur/tibia, obtained from both groups at the end of experimental period, were scanned by micro-computed tomography for TBA/CBG analyses. Serum biochemical analyses were also conducted. Body weight was significantly higher in the HFS group than in the SLD group. In both femur and tibia, the HFS group showed higher trabecular/cortical bone mass in reference to bone mineral content, volume bone mineral density and TBA/CBG parameters compared with the SLD group. In addition, serum calcium, inorganic phosphorus, total protein, triacylglycerol, HDL and TRACP-5b levels were significantly higher in the HFS group than in the SLD group. There were good correlations between body weight and bone parameters in the femur and tibia. These results suggest that HFS diet intake results in higher bone mass in aged rats. Such effects of HFS diet intake might have been induced by increased body weight.
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Key Words
- ALP, alkaline phosphatase
- Aged rats
- BMC, bone mineral content
- BMD, bone mineral density
- BV, bone volume
- BV/TV, bone volume fraction
- CBG, cortical bone geometry
- CV, cortical bone volume
- CV/(CV + MV), cortical volume fraction
- Ca, calcium
- Conn.D, connectivity density
- Cortical bone geometry
- Ct.Ar, cortical bone sectional area
- Ct.Th, cortical bone thickness
- DXA, dual-energy X-ray absorptiometry
- Ec.Pm, endocortical perimeter
- HDL, high-density lipoprotein cholesterol
- HFD, high fat diet
- HFS, high-fat/high-sucrose
- High-fat sucrose diet
- IP, inorganic phosphorus
- LDL, low-density lipoprotein cholesterol
- MV, medullary volume
- Micro-computed tomography
- OC, osteocalcin
- Ps.Pm, periosteal perimeter
- SLD, standard laboratory diet
- TBA, trabecular bone architecture
- TBPf, trabecular bone pattern factor
- TC, total cholesterol
- TG, triacylglycerol
- TMD, tissue mineral density
- TP, total protein
- TRACP-5b, tartrate-resistant acid phosphatase-5b
- TV, tissue volume
- Tb.N, trabecular number
- Tb.Sp, trabecular separation
- Tb.Th, trabecular thickness
- Tb.W, trabecular width
- Trabecular bone architecture
- VOI, volume of interest
- micro-CT, x-ray micro-computed tomography
- vBMD, volume BMD
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Affiliation(s)
- Akira Minematsu
- Department of Physical Therapy, Faculty of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Yasue Nishii
- Department of Physical Therapy, Faculty of Health Science, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
| | - Susumu Sakata
- Department of Physiology, Nara Medical University, 840 Shijou-cho, Kashihara, Nara 634-8521, Japan
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Wu X, Huang Z, Wang X, Fu Z, Liu J, Huang Z, Kong G, Xu X, Ding J, Zhu Q. Ketogenic Diet Compromises Both Cancellous and Cortical Bone Mass in Mice. Calcif Tissue Int 2017; 101:412-421. [PMID: 28547346 DOI: 10.1007/s00223-017-0292-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 05/15/2017] [Indexed: 12/15/2022]
Abstract
To clarify osteoporotic effects of ketogenic diet (KD) on cancellous and cortical bone compared with ovariectomy (OVX) in mice. Forty female C57BL/6J 8-week-old mice were randomly divided into SD+Sham, SD+OVX, KD+Sham, and KD+OVX groups, and fed for 12 weeks. The distal femur of trabecular bone and the middle femur of cortical bone were evaluated with Micro-CT scanning. The maximum bending force and stiffness of the tibia were calculated using a three-point bending test. Osteoblast and osteoclast expression of femur were identified using tartrate-resistant acid phosphatase (TRAP), collagen type I (CoLI), and osteocalcin (OCN) staining. A 2-factor analysis of variance was used to evaluate effects of KD and OVX on radiological, biomechanical, and histological parameters. KD resulted in not only remarkable cancellous bone decline comparable to OVX, but also unique cortical bone reduction. The maximum bending force and stiffness decreased in the KD+Sham and KD+OVX groups but did not change in the SD+OVX group. The KD+OVX led to significantly higher expression in TRAP and noticeably lower expression in CoLI when compared with other groups. Both KD+Sham and SD+OVX prominently increased expression in TRAP, but decreased expression in CoLI. There was no significant difference in OCN among the four groups. The present results suggest that KD compromises both the cancellous and cortical bone architecture of long bones while OVX only in cancellous bone architecture. A combination of KD and OVX may lead to more bone loss.
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Affiliation(s)
- Xiuhua Wu
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Zucheng Huang
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Xiaomeng Wang
- Department of Spinal Surgery, LongYan First Hospital, Longyan, Fujian, China
| | - Zhaozong Fu
- Department of Spinal Surgery, Affiliated Jiangmen Hospital of Sun Yat Sen University, Jiangmen, Guangdong, China
| | - Junhao Liu
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Zhiping Huang
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Ganggang Kong
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Xiaolin Xu
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Jianyang Ding
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China
| | - Qingan Zhu
- Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Avenue, Guangzhou, China.
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16
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Fat, Sugar, and Bone Health: A Complex Relationship. Nutrients 2017; 9:nu9050506. [PMID: 28513571 PMCID: PMC5452236 DOI: 10.3390/nu9050506] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/26/2017] [Accepted: 05/12/2017] [Indexed: 02/05/2023] Open
Abstract
With people aging, osteoporosis is expected to increase notably. Nutritional status is a relatively easily-modified risk factor, associated with many chronic diseases, and is involved in obesity, diabetes, and coronary heart disease (CHD), along with osteoporosis. Nutrients, such as fats, sugars, and proteins, play a primary function in bone metabolism and maintaining bone health. In Western nations, diets are generally high in saturated fats, however, currently, the nutritional patterns dominating in China continue to be high in carbohydrates from starch, cereals, and sugars. Moreover, high fat or high sugar (fructose, glucose, or sucrose) impart a significant impact on bone structural integrity. Due to diet being modifiable, demonstrating the effects of nutrition on bone health can provide an approach for osteoporosis prevention. Most researchers have reported that a high-fat diet consumption is associated with bone mineral density (BMD) and, as bone strength diminishes, adverse microstructure changes occur in the cancellous bone compartment, which is involved with lipid metabolism modulation disorder and the alteration of the bone marrow environment, along with an increased inflammatory environment. Some studies, however, demonstrated that a high-fat diet contributes to achieving peak bone mass, along with microstructure, at a younger age. Contrary to these results, others have shown that a high-fructose diet consumption leads to stronger bones with a superior microarchitecture than those with the intake of a high-glucose diet and, at the same time, research indicated that a high-fat diet usually deteriorates cancellous bone parameters, and that the incorporation of fructose into a high-fat diet did not aggravate bone mass loss. High-fat/high-sucrose diets have shown both beneficial and detrimental influences on bone metabolism. Combined, these studies showed that nutrition exerts different effects on bone health. Thus, a better understanding of the regulation between dietary nutrition and bone health might provide a basis for the development of strategies to improve bone health by modifying nutritional components.
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17
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Dündar S, Yaman F, Ozupek MF, Saybak A, Gul M, Asutay F, Kirtay M, Ozercan IH. The effects of high-fat diet on implant osseointegration: an experimental study. J Korean Assoc Oral Maxillofac Surg 2016; 42:187-92. [PMID: 27595085 PMCID: PMC5009192 DOI: 10.5125/jkaoms.2016.42.4.187] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/22/2016] [Accepted: 05/04/2016] [Indexed: 11/18/2022] Open
Abstract
Objectives In this study, we investigated whether a high-fat diet (HFD) affected the bone implant connection (BIC) in peri-implant bone. Materials and Methods Four male rabbits were used in this study. Dental implant surgery was introduced into each tibia, and four implants were integrated into each animal. In both the normal diet (ND) group (n=2) and HFD group (n=2), 8 implants were integrated, for a total of 16 integrated implants. The animals continued with their respective diets for 12 weeks post-surgery. Afterward, the rabbits were sacrificed, and the BIC was assessed histomorphometrically. Results Histologic and histomorphometric analyses demonstrated that BIC was not impaired in the HFD group compared to the ND group. Conclusion Within the limitations of this study, we found that HFD did not decrease the BIC in rabbit tibias.
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Affiliation(s)
- Serkan Dündar
- Department of Periodontology, Faculty of Dentistry, Firat University, Elazig, Turkey
| | - Ferhan Yaman
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey
| | - Muhammed Fatih Ozupek
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Inonu University, Malatya, Turkey
| | - Arif Saybak
- Periodontists, Private Practice, Adana, Turkey
| | - Mehmet Gul
- Department of Periodontology, Faculty of Dentistry, Dicle University, Diyarbakir, Turkey
| | - Fatih Asutay
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Afyon Kocatepe University, Afyonkarahisar, Turkey
| | - Mustafa Kirtay
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Inonu University, Malatya, Turkey
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18
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Yarrow JF, Toklu HZ, Balaez A, Phillips EG, Otzel DM, Chen C, Wronski TJ, Aguirre JI, Sakarya Y, Tümer N, Scarpace PJ. Fructose consumption does not worsen bone deficits resulting from high-fat feeding in young male rats. Bone 2016; 85:99-106. [PMID: 26855373 PMCID: PMC4801515 DOI: 10.1016/j.bone.2016.02.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 01/29/2016] [Accepted: 02/04/2016] [Indexed: 11/16/2022]
Abstract
Dietary-induced obesity (DIO) resulting from high-fat (HF) or high-sugar diets produces a host of deleterious metabolic consequences including adverse bone development. We compared the effects of feeding standard rodent chow (Control), a 30% moderately HF (starch-based/sugar-free) diet, or a combined 30%/40% HF/high-fructose (HF/F) diet for 12weeks on cancellous/cortical bone development in male Sprague-Dawley rats aged 8weeks. Both HF feeding regimens reduced the lean/fat mass ratio, elevated circulating leptin, and reduced serum total antioxidant capacity (tAOC) when compared with Controls. Distal femur cancellous bone mineral density (BMD) was 23-34% lower in both HF groups (p<0.001) and was characterized by lower cancellous bone volume (BV/TV, p<0.01), lower trabecular number (Tb.N, p<0.001), and increased trabecular separation versus Controls (p<0.001). Cancellous BMD, BV/TV, and Tb.N were negatively associated with leptin and positively associated with tAOC at the distal femur. Similar cancellous bone deficits were observed at the proximal tibia, along with increased bone marrow adipocyte density (p<0.05), which was negatively associated with BV/TV and Tb.N. HF/F animals also exhibited lower osteoblast surface and reduced circulating osteocalcin (p<0.05). Cortical thickness (p<0.01) and tissue mineral density (p<0.05) were higher in both HF-fed groups versus Controls, while whole bone biomechanical characteristics were not different among groups. These results demonstrate that "westernized" HF diets worsen cancellous, but not cortical, bone parameters in skeletally-immature male rats and that fructose incorporation into HF diets does not exacerbate bone loss. In addition, they suggest that leptin and/or oxidative stress may influence DIO-induced alterations in adolescent bone development.
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Affiliation(s)
- Joshua F Yarrow
- Research Service, Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA; Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA.
| | - Hale Z Toklu
- Geriatric Research, Education, and Clinical Center (GRECC), Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA; Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32611, USA
| | - Alex Balaez
- Research Service, Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA
| | - Ean G Phillips
- Research Service, Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA
| | - Dana M Otzel
- Geriatric Research, Education, and Clinical Center (GRECC), Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA
| | - Cong Chen
- Department of Orthopaedics and Rehabilitation, University of Florida, Gainesville, FL 32611, USA
| | - Thomas J Wronski
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32611, USA
| | - J Ignacio Aguirre
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Yasemin Sakarya
- Geriatric Research, Education, and Clinical Center (GRECC), Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA; Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32611, USA
| | - Nihal Tümer
- Geriatric Research, Education, and Clinical Center (GRECC), Malcom Randall Department of Veterans Affairs Medical Center, North Florida/South Georgia Veterans Health System, Gainesville, FL 32608, USA; Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32611, USA
| | - Philip J Scarpace
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, FL 32611, USA
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19
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Alsina E, Macri EV, Lifshitz F, Bozzini C, Rodriguez PN, Boyer PM, Friedman SM. Efficacy of phytosterols and fish-oil supplemented high-oleic-sunflower oil rich diets in hypercholesterolemic growing rats. Int J Food Sci Nutr 2016; 67:441-53. [PMID: 26983467 DOI: 10.3109/09637486.2016.1161010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Phytosterols (P) and fish-oil (F) efficacy on high-oleic-sunflower oil (HOSO) diets were assessed in hypercholesterolemic growing rats. Controls (C) received a standard diet for 8 weeks; experimental rats were fed an atherogenic diet (AT) for 3 weeks, thereafter were divided into four groups fed for 5 weeks a monounsaturated fatty acid diet (MUFA) containing either: extra virgin olive oil (OO), HOSO or HOSO supplemented with P or F. The diets did not alter body weight or growth. HOSO-P and HOSO-F rats showed reduced total cholesterol (T-chol), non-high-density lipoprotein-cholesterol (non-HDL-chol) and triglycerides and increased HDL-chol levels, comparably to the OO rats. Total body fat (%) was similar among all rats; but HOSO-F showed the lowest intestinal, epididymal and perirenal fat. However, bone mineral content and density, and bone yield stress and modulus of elasticity were unchanged. Growing hypercholesterolemic rats fed HOSO with P or F improved serum lipids and fat distribution, but did not influence material bone quality.
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Affiliation(s)
- Estefania Alsina
- a Department of Biochemistry, School of Dentistry , University of Buenos Aires , Buenos Aires , Argentina
| | - Elisa V Macri
- a Department of Biochemistry, School of Dentistry , University of Buenos Aires , Buenos Aires , Argentina
| | - Fima Lifshitz
- b Pediatric Sunshine Academics Inc , Santa Barbara , CA , USA
| | - Clarisa Bozzini
- c Department of Physiology, School of Dentistry , University of Buenos Aires , Buenos Aires , Argentina
| | - Patricia N Rodriguez
- a Department of Biochemistry, School of Dentistry , University of Buenos Aires , Buenos Aires , Argentina
| | - Patricia M Boyer
- c Department of Physiology, School of Dentistry , University of Buenos Aires , Buenos Aires , Argentina
| | - Silvia M Friedman
- d Department of General and Oral Biochemistry, School of Dentistry , University of Buenos Aires , Buenos Aires , Argentina
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Baek K, Hwang HR, Park HJ, Kwon A, Qadir AS, Baek JH. Propranolol, a β-adrenergic antagonist, attenuates the decrease in trabecular bone mass in high calorie diet fed growing mice. BMB Rep 2015; 47:506-11. [PMID: 24393528 PMCID: PMC4206726 DOI: 10.5483/bmbrep.2014.47.9.265] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Indexed: 11/20/2022] Open
Abstract
We investigated the effects of high calorie and low calorie diets on skeletal integrity, and whether β-adrenergic blockade (BB) attenuates bone loss induced by dietary calorie alteration. Male 6-week-old C57BL/6 mice were assigned to either an ad-lib fed control diet (CON), a high calorie diet (HIGH), or a low calorie diet (LOW) group. In each diet group, mice were treated with either vehicle (VEH) or propranolol, a β-adrenergic antagonist. Over 12-weeks, β-blockade mitigated body weight and fat mass increases induced by the high calorie diet. Femoral trabecular bone mineral density and the expression levels of osteogenic marker genes in bone marrow cells were reduced in HIGHVEH and LOWVEH mice, and BB significantly attenuated this decline only in HIGH mice. In summary, the magnitude of bone loss induced by low calorie diet was greater than that caused by high calorie diet in growing mice, and β-blockade mitigated high calorie diet-induced bone loss. [BMB Reports 2014; 47(9): 506-511]
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Affiliation(s)
- Kyunghwa Baek
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749; Department of Pharmacology and Research Institute of Oral Science, College of Dentistry, Gangneung-Wonju National University, Wonju 210-702, Korea
| | - Hyo Rin Hwang
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749, Korea
| | - Hyun-Jung Park
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749, Korea
| | - Arang Kwon
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749, Korea
| | - Abdul S Qadir
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749, Korea
| | - Jeong-Hwa Baek
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 110-749, Korea
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21
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Macri EV, Lifshitz F, Alsina E, Juiz N, Zago V, Lezón C, Rodriguez PN, Schreier L, Boyer PM, Friedman SM. Monounsaturated fatty acids-rich diets in hypercholesterolemic-growing rats. Int J Food Sci Nutr 2015; 66:400-8. [PMID: 25830945 DOI: 10.3109/09637486.2015.1025719] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The effects of replacing dietary saturated fat by different monounsaturated fatty acid (ω-9MUFA) sources on serum lipids, body fat and bone in growing hypercholesterolemic rats were studied. Rats received one of the six different diets: AIN-93G (control, C); extra virgin olive oil (OO) + C; high-oleic sunflower oil (HOSO) + C or atherogenic diet (AT) for 8 weeks; the remaining two groups received AT for 3 weeks and then, the saturated fat was replaced by an oil mixture of soybean oil added with OO or HOSO for 5 weeks. Rats consuming MUFA-rich diets showed the highest body fat, hepatic index and epididymal, intestinal and perirenal fat, and triglycerides. T-chol and non-HDL-chol were increased in HOSO rats but decreased in OO rats. Bone mineral content and density were higher in both OO and HOSO groups than in AT rats. This study casts caution to the generalization of the benefits of MUFA for the treatment of hypercholesterolemia.
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Affiliation(s)
- Elisa V Macri
- Department of Biochemistry, School of Dentistry, University of Buenos Aires , Buenos Aires , Argentina
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22
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Tagzirt M, Corseaux D, Pasquesoone L, Mouquet F, Roma-Lavisse C, Ung A, Lorenzi R, Jude B, Elkalioubie A, Van Belle E, Susen S, Dupont A. Alterations in neutrophil production and function at an early stage in the high-fructose rat model of metabolic syndrome. Am J Hypertens 2014; 27:1096-104. [PMID: 25103937 DOI: 10.1093/ajh/hpu021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Although neutrophils are crucially involved in inflammation, they have received only little attention in metabolic syndrome (MetS). We hypothesized that neutrophil infiltration into adipose tissue (AT) may occur at an early stage of MetS, in association with modulation of major functions of neutrophils and of their bone marrow production. METHODS Fifty-six male Sprague-Dawley rats were fed regular (control rats (CRs)) or high-fructose (60%; fructose-fed rats (FFRs)) diets. After 6 weeks, metabolic parameters were measured. Distribution of neutrophils into AT was investigated by immunohistochemistry. Function of circulating neutrophils (activation, reactive oxygen species production, phagocytosis, and apoptosis) was determined by flow cytometry. Granulopoiesis was evaluated by measuring the number and survival characteristics of neutrophil progenitors using bone marrow culture assays and flow cytometry. RESULTS Compared with the CR group, the FFR group developed MetS (i.e., arterial hypertension, hypertriglyceridemia, fasting hyperglycemia, and greater intra-abdominal AT volume) and presented higher neutrophil infiltration into AT. At resting state, no significant difference for circulating neutrophil functions was observed between the 2 groups. In contrast, circulating neutrophils from the FFR group exhibited higher responses to phorbol-12-myristate-13-acetate for all studied functions, compared with the CR group, suggesting that early MetS induces neutrophil priming. In parallel, a diminished clonal capacity and an increased apoptosis in bone marrow-derived granulocyte progenitors and neutrophil precursors were observed in the FFR group compared with the CR group. CONCLUSIONS These results provide evidence of an increased infiltration into intra-abdominal AT and modified production, function, and phenotype of neutrophils at an early stage of high-fructose diet-induced MetS.
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Affiliation(s)
| | | | | | | | | | - Alexandre Ung
- EA 2693, Univ Lille Nord de France, UDSL, Lille, France
| | | | - Brigitte Jude
- EA 2693, Univ Lille Nord de France, UDSL, Lille, France; Cardiovascular and Pulmonary Department and Hematology Department, University Hospital, Lille, France
| | | | - Eric Van Belle
- EA 2693, Univ Lille Nord de France, UDSL, Lille, France; Cardiovascular and Pulmonary Department and Hematology Department, University Hospital, Lille, France
| | - Sophie Susen
- EA 2693, Univ Lille Nord de France, UDSL, Lille, France; Cardiovascular and Pulmonary Department and Hematology Department, University Hospital, Lille, France
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23
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Baek K, Hwang HR, Park HJ, Kwon A, Qadir AS, Ko SH, Woo KM, Ryoo HM, Kim GS, Baek JH. TNF-α upregulates sclerostin expression in obese mice fed a high-fat diet. J Cell Physiol 2014; 229:640-50. [PMID: 24446199 DOI: 10.1002/jcp.24487] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 10/03/2013] [Indexed: 01/24/2023]
Abstract
Sclerostin decreases bone mass by antagonizing the Wnt signaling pathway. We examined whether obesity-induced bone loss is associated with the expression of sclerostin. Five-week-old male mice were assigned to one of two groups (n = 10 each) and fed either a control diet (10% kcal from fat; CON) or a high-fat diet (60% kcal from fat; HF) for 12 weeks. Thex final body weight and whole body fat mass of the HF mice were higher than those of the CON mice. The distal femur cancellous bone mineral density and bone formation rate was lower in HF mice than in CON mice. The percent erosion surface was higher in the HF mice than the CON mice. The serum levels and femoral osteocytic protein expression levels of tumor necrosis factor-α (TNF-α) were significantly higher in HF mice than in CON mice. Sclerostin mRNA levels and osteocytic sclerostin protein levels in femoral cortex were also higher in HF mice than in CON mice. Sclerostin expression in MLO-Y4 osteocytes increased with TNF-α treatment, and TNF-α-induced sclerostin expression was blocked by the inhibition of NF-κB activation. Chromatin immunoprecipitation and a luciferase reporter assay demonstrated that NF-κB directly binds to the NF-κB binding elements on the mouse sost promoter and stimulates sclerostin expression. These results support a model in which, in the context of obesity or other inflammatory diseases that increase the production of TNF-α, TNF-α upregulates the expression of sclerostin through NF-κB signaling pathway, thus contributing to bone loss.
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Affiliation(s)
- Kyunghwa Baek
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea; Department of Pharmacology, College of Dentistry and Research Institute of Oral Science, Gangneung-Wonju National University, Gangwondo, Korea
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24
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de Albuquerque Maia L, Lisboa PC, de Oliveira E, da Silva Lima N, Lima ICB, Lopes RT, Ruffoni LDG, Nonaka KO, de Moura EG. Bone metabolism in obese rats programmed by early weaning. Metabolism 2014; 63:352-64. [PMID: 24355624 DOI: 10.1016/j.metabol.2013.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 11/11/2013] [Accepted: 11/12/2013] [Indexed: 01/24/2023]
Abstract
OBJECTIVE Obesity and osteoporosis seem to have a common pathogenesis, especially because bone and adipose tissue have common origins. Since early weaning (EW) decreases adipogenesis and osteogenesis in neonate, further programming for obesity and hyperleptinemia, we hypothesized that these changes in adipogenesis could affect bone metabolism. MATERIALS/METHODS Lactating rats were separated into 3 groups: control - dams whose pups ate milk throughout lactation; mechanical EW (MEW) - dams were involved with a bandage interrupting suckling in the last 3days of lactation; pharmacological EW (PEW) - dams were bromocriptine-treated (0.5mg/twice a day via intraperitoneal injection) 3days before weaning. The adult offspring was subjected to dual-energy X-ray absorptiometry and bone tissue was also evaluated by computed tomography, microcomputed tomography and biomechanical tests, beyond serum analyses. RESULTS MEW and PEW presented higher total bone mineral density (BMD), total bone mineral content, spine BMD and bone area in postnatal day 150 (PN150). In PN180, both groups also presented increase of these parameters and higher femur BMD and fourth lumbar vertebra (LV4) BMD, femoral head radiodensity and LV4 vertebral body radiodensity, trabecular number, stiffness and break load; lower trabecular separation, maximal deformation and break deformation, and also hyperleptinemia and higher visceral fat mass and 25-hydroxivitamin D, whereas parathyroid hormone was unchanged. Serum C-terminal cross-linked telopeptide of type I collagen was lower for both groups. CONCLUSIONS Since both models program for obesity and increased bone mass, and leptin increases plasma vitamin D levels, probably leptin is the link between obesity and higher bone mass.
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Affiliation(s)
- Lígia de Albuquerque Maia
- Department of Physiological Sciences, State University of Rio de Janeiro, State University of Rio de Janeiro, Rio de Janeiro, RJ 20550-030, Brazil
| | - Patrícia Cristina Lisboa
- Department of Physiological Sciences, State University of Rio de Janeiro, State University of Rio de Janeiro, Rio de Janeiro, RJ 20550-030, Brazil
| | - Elaine de Oliveira
- Department of Physiological Sciences, State University of Rio de Janeiro, State University of Rio de Janeiro, Rio de Janeiro, RJ 20550-030, Brazil
| | - Natália da Silva Lima
- Department of Physiological Sciences, State University of Rio de Janeiro, State University of Rio de Janeiro, Rio de Janeiro, RJ 20550-030, Brazil
| | - Inaya Correa Barbosa Lima
- Nuclear Instrumentation Laboratory, COPPE-PEN, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-972, Brazil
| | - Ricardo Tadeu Lopes
- Nuclear Instrumentation Laboratory, COPPE-PEN, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-972, Brazil
| | | | - Keico Okino Nonaka
- Laboratory of Exercise Physiology, Federal University of São Carlos, São Carlos, São Paulo, SP 13565-905, Brazil
| | - Egberto Gaspar de Moura
- Department of Physiological Sciences, State University of Rio de Janeiro, State University of Rio de Janeiro, Rio de Janeiro, RJ 20550-030, Brazil.
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Miras AD, Seyfried F, Phinikaridou A, Andia ME, Christakis I, Spector AC, Botnar RM, le Roux CW. Rats fed diets with different energy contribution from fat do not differ in adiposity. Obes Facts 2014; 7:302-10. [PMID: 25277969 PMCID: PMC5644822 DOI: 10.1159/000368622] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 08/01/2014] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE To determine whether rats reaching the same body mass, having been fed either a low-fat (LFD) or a high-fat diet (HFD), differ in white adipose tissue (WAT) deposition. METHODS In experiment 1, 22 Sprague-Dawley rats of the same age were divided into 11 rats with body mass below the batch median and fed a HFD, and 11 above the median and fed a LFD. In experiment 2, 20 Sprague-Dawley rats of the same age and starting body mass were randomised to either a HFD or LFD. When all groups reached similar final body mass, WAT was quantified using magnetic resonance imaging (MRI), dissection, and plasma leptin. RESULTS In experiment 1, both groups reached similar final body mass at the same age; in experiment 2 the HFD group reached similar final body mass earlier than the LFD group. There were no significant differences in WAT as assessed by MRI or leptin between the HFD and LFD groups in both experiments. Dissection revealed a trend for higher retroperitoneal and epididymal adiposity in the HFD groups in both experiments. CONCLUSIONS We conclude that at similar body mass, adiposity is independent of the macronutrient composition of the feeding regimen used to achieve it.
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Affiliation(s)
- Alexander D. Miras
- Section of Investigative Medicine, Imperial College London, UK
- *Dr Alexander Miras, Section of Investigative Medicine, Imperial College London, Hammersmith Hospital, London, W12 0NN (UK),
| | - Florian Seyfried
- Department of General and Visceral, Vascular and Pediatric Surgery, University of Wurzburg, Wurzburg, Germany
| | - Alkystis Phinikaridou
- Division of Imaging Sciences and Biomedical Engineering, The Rayne Institute, 4th Floor, Lambeth Wing, St. Thomas’ Hospital, King's College London, London, UK
| | - Marcelo E. Andia
- Division of Imaging Sciences and Biomedical Engineering, The Rayne Institute, 4th Floor, Lambeth Wing, St. Thomas’ Hospital, King's College London, London, UK
- Radiology Department, School of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | | | - Alan C. Spector
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, FL, USA
| | - René M. Botnar
- Division of Imaging Sciences and Biomedical Engineering, The Rayne Institute, 4th Floor, Lambeth Wing, St. Thomas’ Hospital, King's College London, London, UK
- British Heart Foundation Centre of Excellence, Cardiovascular Division, King's College London, London, UK
- Wellcome Trust and EPSRC Medical Engineering Center, King's College London, UK
| | - Carel W. le Roux
- Section of Investigative Medicine, Imperial College London, UK
- Diabetes Complications Research Centre, UCD Conway Institute, School of Medicine and Medical Science, University College Dublin, Dublin, Ireland
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Maternal high fat feeding does not have long-lasting effects on body composition and bone health in female and male Wistar rat offspring at young adulthood. Molecules 2013; 18:15094-109. [PMID: 24322493 PMCID: PMC6270313 DOI: 10.3390/molecules181215094] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 11/27/2013] [Accepted: 12/03/2013] [Indexed: 11/17/2022] Open
Abstract
High fat diets adversely affect body composition, bone mineral and strength, and alter bone fatty acid composition. It is unclear if maternal high fat (HF) feeding permanently alters offspring body composition and bone health. Female rats were fed control (CON) or HF diet for 10 weeks, bred, and continued their diets throughout pregnancy and lactation. Male and female offspring were studied at weaning and 3 months, following consumption of CON diet. At weaning, but not 3 months of age, male and female offspring from dams fed HF diet had lower lean mass and higher fat and bone mass, and higher femur bone mineral density (females only) than offspring of dams fed CON diet. Male and female offspring femurs from dams fed HF diet had higher monounsaturates and lower n6 polyunsaturates at weaning than offspring from dams fed CON diet, where females from dams fed HF diet had higher saturates and lower n6 polyunsaturates at 3 months of age. There were no differences in strength of femurs or lumbar vertebrae at 3 months of age in either male or female offspring. In conclusion, maternal HF feeding did not permanently affect body composition and bone health at young adulthood in offspring.
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27
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Frommelt L, Bielohuby M, Stoehr BJM, Menhofer D, Bidlingmaier M, Kienzle E. Effects of low-carbohydrate, high-fat diets on apparent digestibility of minerals and trace elements in rats. Nutrition 2013; 30:869-75. [PMID: 24985005 DOI: 10.1016/j.nut.2013.11.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/23/2013] [Accepted: 11/12/2013] [Indexed: 02/03/2023]
Abstract
OBJECTIVE Ketogenic low-carbohydrate, high-fat (LCHF) diets reduce growth and bone mineral density in children with epilepsy and in rats. Part of this effect might be due to a reduced availability of calcium in high-fat diets. The aim of this study was to determine mineral digestibility by total collection method in LCHF diets compared with a chow diet and a standard high-fat diet (HFD, high in fat and carbohydrates). METHODS Twelve-wk-old male Wistar rats were pair-fed isoenergetic amounts of either six different LCHF diets based on tallow and casein (crude fat 75%-50%, crude protein 10%-35%), with chow or with a HFD diet. Mineral-to-energy ratio was matched in all diets. Circulating parathyroid hormone was measured by immunoassay. RESULTS The apparent digestibility of calcium was reduced in all HFDs (high-fat diets, LCHF diets and the HFD diet) by at least 30% compared with the chow diet (P < 0.001). Fecal calcium excretion correlated positively with fecal fat excretion, presumably because of formation of calcium soaps. Apparent digestibility of phosphorous was higher in all HFDs. This resulted in a decrease of the ratio of apparently digested calcium to apparently digested phosphorous in all HFDs below a ratio of 1:1. Plasma parathyroid hormone was not affected by any diet. CONCLUSION The alteration of apparent calcium and phosphorus digestibility may affect the impact of HFDs on bone metabolism.
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Affiliation(s)
- Lena Frommelt
- Chair of Animal Nutrition and Dietetics, Ludwig-Maximilians University, Munich, Germany
| | - Maximilian Bielohuby
- Endocrine Research Unit, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Ludwig-Maximilians University, Munich, Germany
| | - Barbara J M Stoehr
- Endocrine Research Unit, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Ludwig-Maximilians University, Munich, Germany
| | - Dominik Menhofer
- Endocrine Research Unit, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Ludwig-Maximilians University, Munich, Germany
| | - Martin Bidlingmaier
- Endocrine Research Unit, Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Ludwig-Maximilians University, Munich, Germany
| | - Ellen Kienzle
- Chair of Animal Nutrition and Dietetics, Ludwig-Maximilians University, Munich, Germany.
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Inzana JA, Kung M, Shu L, Hamada D, Xing LP, Zuscik MJ, Awad HA, Mooney RA. Immature mice are more susceptible to the detrimental effects of high fat diet on cancellous bone in the distal femur. Bone 2013; 57:174-83. [PMID: 23954757 PMCID: PMC3826882 DOI: 10.1016/j.bone.2013.08.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 08/01/2013] [Accepted: 08/08/2013] [Indexed: 11/28/2022]
Abstract
With the increasing prevalence of obesity among children and adolescents, it is imperative to understand the implications of early diet-induced obesity on bone health. We hypothesized that cancellous bone of skeletally immature mice is more susceptible to the detrimental effects of a high fat diet (HFD) than mature mice, and that removing excess dietary fat will reverse these adverse effects. Skeletally immature (5weeks old) and mature (20weeks old) male C57BL/6J mice were fed either a HFD (60% kcal fat) or low fat diet (LFD; 10% kcal fat) for 12weeks, at which point, the trabecular bone structure in the distal femoral metaphysis and third lumbar vertebrae were evaluated by micro-computed tomography. The compressive strength of the vertebrae was also measured. In general, the HFD led to deteriorations in cancellous bone structure and compressive biomechanical properties in both age groups. The HFD-fed immature mice had a greater decrease in trabecular bone volume fraction (BVF) in the femoral metaphysis, compared to mature mice (p=0.017 by 2-way ANOVA). In the vertebrae, however, the HFD led to similar reductions in BVF and compressive strength in the two age groups. When mice on the HFD were switched to a LFD (HFD:LFD) for an additional 12weeks, the femoral metaphyseal BVF in immature mice showed no improvements, whereas the mature mice recovered their femoral metaphyseal BVF to that of age-matched lean controls. The vertebral BVF and compressive strength of HFD:LFD mouse bones, following diet correction, were equivalent to those of LFD:LFD mice in both age groups. These data suggest that femoral cancellous metaphyseal bone is more susceptible to the detrimental effects of HFD before skeletal maturity and is less able to recover after correcting the diet. Negative effects of HFD on vertebrae are less severe and can renormalize with LFD:LFD mice after diet correction, in both skeletally immature and mature animals.
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Affiliation(s)
- Jason A. Inzana
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
- Department of Biomedical Engineering, University of Rochester, 207 Robert B. Goergen Hall, Rochester, NY 14642, United States
| | - Ming Kung
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
| | - Lei Shu
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, United States
| | - Daisuke Hamada
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, United States
| | - Lian Ping Xing
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, United States
| | - Michael J. Zuscik
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
| | - Hani A. Awad
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
- Department of Biomedical Engineering, University of Rochester, 207 Robert B. Goergen Hall, Rochester, NY 14642, United States
| | - Robert A. Mooney
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Avenue, Box 665, Rochester, NY 14642, United States
- Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 626, Rochester, NY 14642, United States
- Corresponding Author Robert A. Mooney, Ph.D., Department of Pathology and Laboratory Medicine, University of Rochester Medical Center, 601 Elmwood Avenue, Box 608, Rochester, NY 14642, United States, 1-585-275-7811,
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Gerbaix M, Metz L, Mac-Way F, Lavet C, Guillet C, Walrand S, Masgrau A, Linossier MT, Vico L, Courteix D. Impact of an obesogenic diet program on bone densitometry, micro architecture and metabolism in male rat. Lipids Health Dis 2012; 11:91. [PMID: 22781503 PMCID: PMC3439365 DOI: 10.1186/1476-511x-11-91] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 07/10/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The relationships between fat mass and bone tissue are complex and not fully elucidated. A high-fat/high-sucrose diet has been shown to induce harmful effects on bone micro architecture and bone biomechanics of rat. When such diet leads to obesity, it may induce an improvement of biomechanical bone parameters in rodent.Here, we examined the impact of a high-fat/high-sucrose diet on the body composition and its resulting effects on bone density and structure in male rats. Forty three Wistar rats aged 7 months were split into 3 groups: 1 sacrificed before diet (BD, n = 14); 1 subjected to 16 weeks of high-fat/high-sucrose diet (HF/HS, n = 14); 1 subjected to standard diet (Control, n = 15). Abdominal circumference and insulin sensitivity were measured and visceral fat mass was weighed. The bone mineral density (BMD) was analyzed at the whole body and tibia by densitometry. Microcomputed tomography and histomorphometric analysis were performed at L2 vertebrae and tibia to study the trabecular and cortical bone structures and the bone cell activities. Osteocalcin and CTX levels were performed to assess the relative balance of the bone formation and resorption. Differences between groups have been tested with an ANOVA with subsequent Scheffe post-hoc test. An ANCOVA with global mass and global fat as covariates was used to determine the potential implication of the resulting mechanical loading on bone. RESULTS The HF/HS group had higher body mass, fat masses and abdominal circumference and developed an impaired glucose tolerance (p < 0.001). Whole body bone mass (p < 0.001) and BMD (p < 0.05) were higher in HF/HS group vs. Control group. The trabecular thickness at vertebrae and the cortical porosity of tibia were improved (p < 0.05) in HF/HS group. Bone formation was predominant in HF/HS group while an unbalance bone favoring bone resorption was observed in the controls. The HF/HS and Control groups had higher total and abdominal fat masses and altered bone parameters vs. BD group. CONCLUSIONS The HF/HS diet had induced obesity and impaired glucose tolerance. These changes resulted in an improvement of quantitative, qualitative and metabolic bone parameters. The fat mass increase partly explained these observations.
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Affiliation(s)
- Maude Gerbaix
- Laboratoire des Adaptations Métaboliques à l'Exercice en conditions Physiologiques et Pathologiques, Clermont Université, Université Blaise Pascal, EA 3533, BP 80026, F-63171, Aubière Cedex, France.
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30
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Gene expression profile in bone of diabetes-prone BB/OK rats fed a high-fat diet. GENES AND NUTRITION 2012; 8:99-104. [PMID: 22639302 DOI: 10.1007/s12263-012-0299-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Accepted: 05/02/2012] [Indexed: 12/13/2022]
Abstract
A high-fat diet (HFD) has been recognized as a risk factor for diseases such as dyslipidemia, atherosclerosis, obesity, and osteoporosis. However, studies analyzing gene expression after HFD in bone are rare. That prompted us to analyze the expression of selected genes in bone of 4-week-old diabetes-prone B(io)B(reeding) rats. Two breeding pairs were fed a HFD (+10 % tallow) or were fed a normal diet (ND; Ssniff R-Z) before mating and afterward during pregnancy. After the birth of progeny, parents continued to be given HFD or ND until the progeny was weaned (3 weeks). Thereafter, offspring were weaned and were fed the same food as their parents up to an age of 4 weeks. Body weight was measured at an age of 4 weeks, and subsequently 13 HFD rats and 13 ND rats were killed and the tibial bone was harvested to analyze the expression of 53 genes in bone. All rats fed HFD were significantly heavier than rats fed ND after 3 and 4 weeks. The diet also influenced the expression of genes in bone. There were significant differences in 20 out of 53 genes studied between rats fed HFD compared with rats fed ND. Four out of 20 had a lower and 17 out of 20 genes a higher expression in HFD rats, but differences in gene expression showed obvious differences between males and females. There were only two genes that were similarly different between males and females: Bmp4 and Atf4. Two genes, Foxg1 and Npy, were inversely expressed in males and females. It seems that the gene expression is differently regulated by diet during pregnancy and later in life between males and females. Nevertheless, it cannot be excluded that HFD also acts as an epigenetic factor in the development of offspring in utero.
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Tissue-specific expression of Sprouty1 in mice protects against high-fat diet-induced fat accumulation, bone loss and metabolic dysfunction. Br J Nutr 2011; 108:1025-33. [PMID: 22142492 DOI: 10.1017/s0007114511006209] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We recently characterised Sprouty1 (Spry1), a growth factor signalling inhibitor as a regulator of marrow progenitor cells promoting osteoblast differentiation at the expense of adipocytes. Adipose tissue-specific Spry1 expression in mice resulted in increased bone mass and reduced body fat, while conditional knockout of Spry1 had the opposite effect with decreased bone mass and increased body fat. Because Spry1 suppresses normal fat development, we tested the hypothesis that Spry1 expression prevents high-fat diet-induced obesity, bone loss and associated lipid abnormalities, and demonstrate that Spry1 has a long-term protective effect on mice fed a high-energy diet. We studied diet-induced obesity in mice with fatty acid binding promoter-driven expression or conditional knockout of Spry1 in adipocytes. Phenotyping was performed by whole-body dual-energy X-ray absorptiometry, microCT, histology and blood analysis. In conditional Spry1-null mice, a high-fat diet increased body fat by 40 %, impaired glucose regulation and led to liver steatosis. However, overexpression of Spry1 led to 35 % (P < 0·05) lower body fat, reduced bone loss and normal metabolic function compared with single transgenics. This protective phenotype was associated with decreased circulating insulin (70 %) and leptin (54 %; P < 0·005) compared with controls on a high-fat diet. Additionally, Spry1 expression decreased adipose tissue inflammation by 45 %. We show that conditional Spry1 expression in adipose tissue protects against high-fat diet-induced obesity and associated bone loss.
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Xiao Y, Cui J, Shi Y, Le G. Lipoic acid increases the expression of genes involved in bone formation in mice fed a high-fat diet. Nutr Res 2011; 31:309-17. [PMID: 21530805 DOI: 10.1016/j.nutres.2011.03.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 03/18/2011] [Accepted: 03/21/2011] [Indexed: 10/18/2022]
Abstract
Antioxidant lipoic acid (LA) has been reported to have a potential prophylactic effect on bone loss induced by high-fat diet (HFD). The aim of this work was to examine the hypothesis that LA decreases bone resorption-related gene expression and increases bone formation-related gene expression in HFD-fed mice, preventing a shift in the bone metabolism balance toward resorption. Male C57BL/6 mice were fed a normal diet, HFD, or HFD plus 0.1% LA for 12 weeks. The bone metabolism-related genes differentially expressed between mice fed HFD and those fed HFD supplemented with LA were identified through complementary DNA microarray. The supplemental LA significantly increased bone mineral density and bone antioxidant capacity in mice fed HFD (P < .05). Compared with the HFD-fed mice, LA induced the decreased expression of genes associated with bone resorption, such as Mmp9 (1.9-fold) and Ctsk (2.3-fold), and increased those genes associated with bone formation, such as Col1a1 (1.3-fold) and Alp1 (1.5-fold). Furthermore, LA upregulated many genes involved in the Igf signaling pathway, such as Igf-1 (increased 1.7-fold), and downregulated genes involved in the p53 apoptotic pathway, such as p53 (decreased 2.3-fold), thus attenuating the HFD-induced inhibition of bone formation. Lipoic acid induced upregulation of Il12a (2.1-fold) and downregulation of Tgfbr1 (4.3-fold) and Il17a (11.3-fold), which may reduce bone resorption. In summary, LA supplementation during HFD could affect bone density, altering gene expression.
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Affiliation(s)
- Ying Xiao
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 200235, China.
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Lau BY, Fajardo VA, McMeekin L, Sacco SM, Ward WE, Roy BD, Peters SJ, Leblanc PJ. Influence of high-fat diet from differential dietary sources on bone mineral density, bone strength, and bone fatty acid composition in rats. Appl Physiol Nutr Metab 2010; 35:598-606. [PMID: 20962915 DOI: 10.1139/h10-052] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous studies have suggested that high-fat diets adversely affect bone development. However, these studies included other dietary manipulations, including low calcium, folic acid, and fibre, and (or) high sucrose or cholesterol, and did not directly compare several common sources of dietary fat. Thus, the overall objective of this study was to investigate the effect of high-fat diets that differ in fat quality, representing diets high in saturated fatty acids (SFA), n-3 polyunsaturated fatty acids (PUFA), or n-6 PUFA, on femur bone mineral density (BMD), strength, and fatty acid composition. Forty-day-old male Sprague-Dawley rats were maintained for 65 days on high-fat diets (20% by weight), containing coconut oil (SFA; n = 10), flaxseed oil (n-3 PUFA; n = 10), or safflower oil (n-6 PUFA; n = 11). Chow-fed rats (n = 10), at 105 days of age, were included to represent animals on a control diet. Rats fed high-fat diets had higher body weights than the chow-fed rats (p < 0.001). Among all high-fat groups, there were no differences in femur BMD (p > 0.05) or biomechanical strength properties (p > 0.05). Femurs of groups fed either the high n-3 or high n-6 PUFA diets were stronger (as measured by peak load) than those of the chow-fed group, after adjustment for significant differences in body weight (p = 0.001). As expected, the femur fatty acid profile reflected the fatty acid composition of the diet consumed. These results suggest that high-fat diets, containing high levels of PUFA in the form of flaxseed or safflower oil, have a positive effect on bone strength when fed to male rats 6 to 15 weeks of age.
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Affiliation(s)
- Beatrice Y Lau
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON M5S 1A1, Canada
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Gerbaix M, Metz L, Ringot E, Courteix D. Visceral fat mass determination in rodent: validation of dual-energy X-ray absorptiometry and anthropometric techniques in fat and lean rats. Lipids Health Dis 2010; 9:140. [PMID: 21143884 PMCID: PMC3014952 DOI: 10.1186/1476-511x-9-140] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 12/09/2010] [Indexed: 11/26/2022] Open
Abstract
Background Because abdominal obesity is predisposed to various metabolic disorders, it is of major importance to assess and track the changes with time of this specific fat mass. The main issue for clinicians or researchers is to use techniques for assessing abdominal fat deposition and its accumulation or changes over time, without sacrificing of experimental subjects. In the rat, techniques to investigate in-vivo visceral fat mass are lacking. The purpose of the study was to validate indirect Dual-energy X-ray Absorptiometry technique and abdominal circumference measurement as tools to predict visceral adipose tissue in rats. Forty-three Wistar male rats from different body weight, fat mass and ages were included in the study. Visceral fat mass was assessed by weighing the total perirenal and peri-epididymal adipose tissues after dissection. Statistical methods were used to discriminate the best region of interest allowing the in-vivo measure of Central Fat Mass by DXA. Abdominal circumference was measured at the same time as the DXA scan. Results A region of interest including Central Fat Mass from the whole body DXA scan (extending from L2 to L5 vertebrae), correlated strongly with ex-vivo Fat Mass (r = 0.94, p < 0.001). Abdominal circumference correlated significantly with ex-vivo Fat Mass (r = 0.82, p < 0.001) and Central Fat Mass (0.90, p < 0.001) in the whole group of rats. When dividing the whole group into lean and fat rats, correlations remained significant between Central Fat Mass and ex-vivo Fat Mass but disappeared for the lean group between abdominal circumference and ex-vivo Fat Mass. Conclusions This study validates the Central Fat Mass determined by DXA as a non-sacrificial technique to assess visceral fat for in-vivo investigations in rats. The abdominal circumference measure appears useful in studying overweight or obese rats. These two techniques could be convenient tools in follow-up and longitudinal studies.
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Affiliation(s)
- Maude Gerbaix
- Laboratoire de Biologie des APS, EA 3533, PRES Clermont Université, Université Blaise Pascal, 24 Avenue des Landais, BP 80026, 63177 Aubière Cedex, France.
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Graham LS, Tintut Y, Parhami F, Kitchen CMR, Ivanov Y, Tetradis S, Effros RB. Bone density and hyperlipidemia: the T-lymphocyte connection. J Bone Miner Res 2010; 25:2460-9. [PMID: 20533376 PMCID: PMC3179287 DOI: 10.1002/jbmr.148] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Revised: 04/07/2010] [Accepted: 05/27/2010] [Indexed: 01/07/2023]
Abstract
Osteoporosis, which contributes to morbidity and mortality, often coexists with cardiovascular disease, especially atherosclerosis. We have reported recently that in vitro exposure of human T-lymphocytes to oxidized lipids induced expression of a key osteoclastogenic cytokine, receptor activator of NF-κB ligand (RANKL). Our previous studies have shown that mice fed an atherogenic high-fat diet developed osteopenia and that bone marrow preosteoclasts from these hyperlipidemic mice have increased osteoclastic potential. To investigate the role of T-lymphocytes in the diet-induced bone loss, C57BL/6 mice were fed either chow or a high-fat diet, and bone parameters and T-lymphocyte activation were assessed at 6 and 11 months. Consistent with our previous findings, peripheral quantitative computed tomographic (pQCT) analysis showed that mice in the high-fat group had lower bone mineral content than mice in the chow group. Furthermore, histomorphometric analysis showed decreased structural parameters in the high-fat group. Coculture studies showed that bone marrow cells isolated from the high-fat group, which contained increased levels of activated memory T-lymphocytes compared with bone marrow cells from the chow mice, supported osteoclastic differentiation of RAW 264.7 cells. Additionally, RANKL expression was upregulated significantly in the T-lymphocytes isolated from the bone marrow of the high-fat group. Splenic T-lymphocytes isolated from the high-fat group also had increased expression of transcripts for the receptor for oxidized lipids (LOX-1) as well as for inflammatory and osteoclastogenic cytokines, including RANKL, interleukin 6 (IL-6), tumor necrosis factor α (TNF-α), IL-1β, and interferon γ (IFN-γ). Together these findings suggest that T-lymphocytes play a key role in the osteoclastogenesis induced by a high-fat diet and may contribute to the bone loss associated with diet-induced osteopenia.
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Affiliation(s)
- Lucia S Graham
- Department of Pathology and Laboratory Medicine and David Geffen School of Medicine at the University of California Los AngelesLos Angeles, CA, USA
| | - Yin Tintut
- Department of Medicine, David Geffen School of Medicine at the University of California Los AngelesLos Angeles, CA, USA
| | - Farhad Parhami
- Department of Medicine, David Geffen School of Medicine at the University of California Los AngelesLos Angeles, CA, USA
| | - Christina MR Kitchen
- Department of Biostatistics, University of California Los Angeles School of Public HealthLos Angeles, CA, USA
| | - Yevgeniv Ivanov
- Department of Medicine, David Geffen School of Medicine at the University of California Los AngelesLos Angeles, CA, USA
| | - Sotirios Tetradis
- Division of Diagnostic and Surgical Sciences, University of California Los Angeles School of DentistryLos Angeles, CA, USA
| | - Rita B Effros
- Department of Pathology and Laboratory Medicine and David Geffen School of Medicine at the University of California Los AngelesLos Angeles, CA, USA
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Xiao Y, Cui J, Li YX, Shi YH, Le GW. Expression of Genes Associated with Bone Resorption is Increased and Bone Formation is Decreased in Mice Fed a High-Fat Diet. Lipids 2010; 45:345-55. [DOI: 10.1007/s11745-010-3397-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Accepted: 02/11/2010] [Indexed: 01/07/2023]
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Russell M, Mendes N, Miller KK, Rosen CJ, Lee H, Klibanski A, Misra M. Visceral fat is a negative predictor of bone density measures in obese adolescent girls. J Clin Endocrinol Metab 2010; 95:1247-55. [PMID: 20080853 PMCID: PMC2841531 DOI: 10.1210/jc.2009-1475] [Citation(s) in RCA: 180] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
CONTEXT Regional fat is increasingly recognized as a determinant of bone mineral density (BMD), an association that may be mediated by adipokines, such as adiponectin and leptin, and inflammatory fat products. Chronic inflammation is deleterious to bone, and visceral adipose tissue (VAT) predicts inflammatory markers such as soluble intercellular adhesion molecule-1 and E-selectin, whereas sc adipose tissue (SAT) and VAT predict IL-6 in adolescents. OBJECTIVE Our objective was to determine associations of regional fat mass and adipokines with BMD. We hypothesized that girls with greater VAT relative to SAT would have lower bone density mediated by inflammatory cytokines, adiponectin, and leptin. DESIGN This was a cross-sectional study. SETTING The study was conducted at a clinical research center. SUBJECTS SUBJECTS included 30 girls (15 obese, 15 normal weight) 12-18 yr old, matched for maturity (bone age), race, and ethnicity. OUTCOME MEASURES We assessed regional fat (SAT, VAT) using magnetic resonance imaging, total fat, and BMD using dual-energy x-ray absorptiometry. Fasting leptin, adiponectin, IL-6, soluble intercellular adhesion molecule-1, and E-selectin were obtained. RESULTS Mean body mass index sd score was 3.7 +/- 1.5 in obese subjects and 0.1 +/- 0.4 kg/m(2) in controls. VAT was a negative predictor of spine BMD and bone mineral apparent density, whole-body BMD and bone mineral content/height in obese girls and whole-body BMD and bone mineral content/height for the group as a whole after controlling for SAT, as was the ratio of VAT to SAT. In a regression model that included VAT/SAT, adipokines, and cytokines, E-selectin and adiponectin were negative predictors of BMD and leptin a positive predictor. CONCLUSION VAT is an independent inverse determinant of bone density in obesity. This association may be mediated by adipokines and a chronic inflammatory state.
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Affiliation(s)
- Melissa Russell
- M.P.H., BUL 457, Neuroendocrine Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
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Short-term exposure to low-carbohydrate, high-fat diets induces low bone mineral density and reduces bone formation in rats. J Bone Miner Res 2010; 25:275-84. [PMID: 19653818 DOI: 10.1359/jbmr.090813] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Low-carbohydrate, high-fat (LC-HF) diets are popular for inducing weight loss in adults and are also used as part of a treatment for children with epilepsy. However, potential risks and side effects remain controversial. We investigated effects of LC-HF diets on growth, bone mineral density (BMD), and turnover in growing rats fed for 4 weeks either normal chow (CH, 9% fat, 33% protein, and 58% carbohydrates), LC-HF-1 (66% fat, 33% protein, and 1% carbohydrates), or LC-HF-2 (94.5% fat, 4.2% protein, and 1.3% carbohydrates). Rats fed LC-HF diets accumulated significantly more visceral and bone marrow fat and showed increased leptin but decreased insulin-like growth-factor 1 (IGF-1). Both LC-HF diets significantly decreased body length (nose to rump), but lengths of humerus, tibia, and femur were significantly reduced with LC-HF-2 only. Peripheral quantitative computed tomography (pQCT) and micro-CT (microCT) independently revealed significant reductions in BMD of tibiae in both LC-HF groups, and tibial maximum load was impaired. Bone-formation marker N-terminal propeptide of type I procollagen was reduced in sera of LC-HF groups, whereas bone resorption marker CrossLaps remained unchanged. Real-time PCR analysis revealed significant reductions by 70% to 80% of transcription factors influencing osteoblastogenesis (Runx2, osterix, and C/EBPbeta) in bone marrow of rats fed LC-HF diets. In conclusion, both LC-HF diets impaired longitudinal growth, BMD, and mechanical properties, possibly mediated by reductions in circulating IGF-1. Serum bone-formation markers as well as expression of transcription factors influencing osteoblastogenesis were reduced. This might indicate a lower rate of mesenchymal stem cells differentiating into osteoblasts, thus explaining reduced bone formation with LC-HF diets.
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Zhuo Q, Wang ZQ, Fu P, Piao JH, Tian Y, Xu J, Yang XG. Association between adiponectin and metabolic syndrome in older adults from major cities of China. BIOMEDICAL AND ENVIRONMENTAL SCIENCES : BES 2010; 23:53-61. [PMID: 20486437 DOI: 10.1016/s0895-3988(10)60032-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To investigate the association between adiponectin and metabolic syndrome (MetS) and related diseases in older adults from major cities of China. METHODS A total of 2 049 adults at the age of 60-96 years from 18 major cities of China were enrolled in the study. Plasma adiponectin and insulin concentrations were measured. Insulin resistance was assessed by homeostasis model assessment of insulin resistance (HOMA-IR). The definitions proposed by International Diabetes Federation (IDF) and American Heart Association/National Heart, Lung, and Blood Institute (AHA/NLHBI) were used to identify MetS. RESULTS The adiponectin concentration increased with the advance of age and was higher in women than in men. The sex specific adiponectin concentration was inversely correlated with body mass index (BMI), waist circumference, diastolic blood pressure, triglycerides, glucose and fasting blood insulin, and positively correlated with HDL-C (P < 0.001). The adiponectin concentration decreased with increasing MetS components. Compared with the 4th sex-specific adiponectin quartile, the odds ratio (OR) for prevalent MetS-IDF and MetS-AHA/NLHBI in subjects of the 1st quartile group was 3.25 (95% CI: 2.24, 4.71) and 3.21 (95% CI: 2.26, 4.55), respectively. The association was independent of age, sex, life-style factors, medication, family history of chronic diseases, BMI, and HOMA-IR. The OR for MetS was much higher than those of MetS components and its related diseases. CONCLUSION Adiponectin is strongly associated with MetS independent of insulin resistance and obesity in older adults from major cities in China. The adiponectin concentration is a useful predictor for the risk of MetS.
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Affiliation(s)
- Qin Zhuo
- National Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing 100050, China
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Russell M, Mendes N, Miller KK, Rosen CJ, Lee H, Klibanski A, Misra M. Visceral fat is a negative predictor of bone density measures in obese adolescent girls. THE JOURNAL OF CLINICAL ENDOCRINOLOGY AND METABOLISM 2010. [PMID: 20080853 DOI: 10.1210/jc.2009.1475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
CONTEXT Regional fat is increasingly recognized as a determinant of bone mineral density (BMD), an association that may be mediated by adipokines, such as adiponectin and leptin, and inflammatory fat products. Chronic inflammation is deleterious to bone, and visceral adipose tissue (VAT) predicts inflammatory markers such as soluble intercellular adhesion molecule-1 and E-selectin, whereas sc adipose tissue (SAT) and VAT predict IL-6 in adolescents. OBJECTIVE Our objective was to determine associations of regional fat mass and adipokines with BMD. We hypothesized that girls with greater VAT relative to SAT would have lower bone density mediated by inflammatory cytokines, adiponectin, and leptin. DESIGN This was a cross-sectional study. SETTING The study was conducted at a clinical research center. SUBJECTS SUBJECTS included 30 girls (15 obese, 15 normal weight) 12-18 yr old, matched for maturity (bone age), race, and ethnicity. OUTCOME MEASURES We assessed regional fat (SAT, VAT) using magnetic resonance imaging, total fat, and BMD using dual-energy x-ray absorptiometry. Fasting leptin, adiponectin, IL-6, soluble intercellular adhesion molecule-1, and E-selectin were obtained. RESULTS Mean body mass index sd score was 3.7 +/- 1.5 in obese subjects and 0.1 +/- 0.4 kg/m(2) in controls. VAT was a negative predictor of spine BMD and bone mineral apparent density, whole-body BMD and bone mineral content/height in obese girls and whole-body BMD and bone mineral content/height for the group as a whole after controlling for SAT, as was the ratio of VAT to SAT. In a regression model that included VAT/SAT, adipokines, and cytokines, E-selectin and adiponectin were negative predictors of BMD and leptin a positive predictor. CONCLUSION VAT is an independent inverse determinant of bone density in obesity. This association may be mediated by adipokines and a chronic inflammatory state.
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Affiliation(s)
- Melissa Russell
- M.P.H., BUL 457, Neuroendocrine Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
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Liang C, Oest ME, Jones JC, Prater MR. Gestational high saturated fat diet alters C57BL/6 mouse perinatal skeletal formation. ACTA ACUST UNITED AC 2009; 86:362-9. [DOI: 10.1002/bdrb.20204] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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