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Filip R, Radzki RP, Bieńko M. Novel insights into the relationship between nonalcoholic fatty liver disease and osteoporosis. Clin Interv Aging 2018; 13:1879-1891. [PMID: 30323574 PMCID: PMC6174895 DOI: 10.2147/cia.s170533] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Excess fat deposition and insulin resistance are considered the main risk factors for nonalcoholic fatty liver disease (NAFLD), and therefore, not surprisingly, the global prevalence of NAFLD increases in parallel with both obesity and type 2 diabetes. Although deterioration of bone homeostasis in patients with NAFLD is commonly observed, its etiology has not been fully elucidated yet. It was shown in several studies that bone tissue seems to be independently associated with NAFLD. A mechanistic perspective puts the liver at the center of mutual interdependencies obviously involving adipose tissue and muscles and also the bone matrix and bone cells, which are relatively novel. In this review, various pathophysiological mechanisms and possible mediating molecules that may interplay between NAFLD and bone tissue are described. Chronic inflammation, vitamin D3, growth hormone, insulin-like growth factor 1, osteopontin, fetuin-A, irisin, osteocalcin, and osteoprotegerin from osteoblasts have been proposed as mediators of mutual interactions among the skeleton, fatty tissue, and liver. Although to date there are still many issues that have not been elucidated, growing evidence suggests that screening and surveillance of bone mineral density in patients with NAFLD should be considered in future strategies and guidelines for NAFLD management.
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Affiliation(s)
- Rafał Filip
- Department of Gastroenterology with IBD Unit, Clinical Hospital 2, Rzeszów, Poland,
- University of Rzeszów, Rzeszów, Poland,
| | - Radosław P Radzki
- Department of Animal Physiology, University of Life Sciences, Lublin, Poland
| | - Marek Bieńko
- Department of Animal Physiology, University of Life Sciences, Lublin, Poland
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Jürimäe J, Lätt E, Remmel L, Purge P, Tillmann V. Longitudinal changes in bone-testis axis and their associations with insulin resistance in 11- to 12-year-old boys. Bone 2018; 108:115-120. [PMID: 29309847 DOI: 10.1016/j.bone.2018.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 01/03/2018] [Accepted: 01/04/2018] [Indexed: 10/18/2022]
Abstract
PURPOSE Associations between osteocalcin (OCN), an osteoblast-specific hormone, and different markers of energy metabolism and insulin resistance have been reported in adults, but few studies have investigated this in children. The aim of the current study was to investigate serum OCN levels during pubertal development in normal weight (NW) and overweight (OW) boys, and to evaluate possible associations of OCN with body composition, testosterone, insulin resistance and adipocytokine values during puberty. METHODS Ninety 11- to 12-year-old boys were investigated at 12-month intervals over the next 2years. Boys were divided by their BMI into NW (n=60) and OW (n=30) groups. Serum OCN, testosterone, leptin, adiponectin, insulin, HOMA-IR score, and body composition were measured. RESULTS Pubertal development over the 2-year period was similar in both groups. Serum OCN was not different at the beginning of the study and increased similarly in both groups. However, at the end of the study, NW had higher OCN than OW (142.9±5.2 vs. 124.0±7.4ng/ml; p<0.05). OW had higher leptin, insulin and HOMA-IR compared to NW, and these differences remained significant through the 2-year period. Testosterone, insulin and HOMA-IR increased through the study period in both groups. In multiple regression analyses increment in OCN was associated with the increase in testosterone in NW (p<0.001) and OW (p=0.049) boys. Increment in OCN was also associated with the increase in insulin (p=0.019) and HOMA-IR (p=0.012) over the 2-year period in NW boys. CONCLUSION Serum OCN concentration increases in puberty and the increment is positively associated with the rise in testosterone level in both NW and OW boys. The positive association between the rise in OCN and insulin in NW boys would suggest that OCN may have a role in the development of insulin resistance.
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Affiliation(s)
- Jaak Jürimäe
- Institute of Sport Sciences and Physiotherapy, Faculty of Medicine, University of Tartu, Tartu, Estonia.
| | - Evelin Lätt
- Institute of Sport Sciences and Physiotherapy, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Liina Remmel
- Institute of Sport Sciences and Physiotherapy, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Priit Purge
- Institute of Sport Sciences and Physiotherapy, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - Vallo Tillmann
- Department of Paediatrics, Faculty of Medicine, University of Tartu, Tartu, Estonia
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Soltani S, Hunter GR, Kazemi A, Shab-Bidar S. The effects of weight loss approaches on bone mineral density in adults: a systematic review and meta-analysis of randomized controlled trials. Osteoporos Int 2016; 27:2655-2671. [PMID: 27154437 DOI: 10.1007/s00198-016-3617-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/26/2016] [Indexed: 12/15/2022]
Abstract
UNLABELLED We assessed the impact of weight loss strategies including calorie restriction and exercise training on BMD in adults using a systematic review of randomized controlled trials. Weight reduction results in reduced BMD at the hip, but has less effect on the spine. Both calorie restriction and a combination of calorie restriction and exercise result in a decrease in hip bone density, whereas weight loss response to exercise training without dietary restriction leads to increased hip BMD. INTRODUCTION Findings are not consistent on the effect of weight loss on bone mineral density (BMD). We conducted a systematic review on the randomized controlled trials to assess the effect of weight loss strategies, including calorie restriction and exercise programs on BMD in adults. METHODS A structured and comprehensive search of MEDLINE and EMBASE databases was undertaken up to March 2016. Study-specific mean differences (MD) were pooled using a random-effects model. Subgroup analysis and meta-regression were used to find possible sources of between-study heterogeneity. RESULTS Thirty-two randomized controlled trials met predetermined inclusion criteria. The meta-analysis revealed no significant difference on total BMD (MD 0.007, 95 % CI -0.020-0.034, p = 0.608). In contrast, the pooled data of studies showed a significant effect of weight loss on hip BMD (MD -0.008, 95 % CI -0.09 to -0.006 g/cm(2), p < 0.001) and also lumbar spine BMD (MD -0.018 g/cm(2), 95 % CI -0.019 to -0.017, p < 0.001). BMD in the hip site decreased after more than 4 months, especially in those who were obese. Moreover, calorie restriction interventions longer than 13 months showed a significant decreased in lumbar spine BMD. CONCLUSION Weight loss led to significant decreases at the hip and lumbar spine BMD but not at the total. Weight loss response following calorie restriction resulted in a decrease in hip and lumbar spine bone density especially more than 1 year; whereas an exercise-induced weight loss did not.
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Affiliation(s)
- S Soltani
- Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Hemaat Highway, 1449614535, Tehran, Iran
| | - G R Hunter
- Department of Human Studies School of Education, University of Alabama at Birmingham, EB 205 1720 2nd Ave South, Birmingham, AL, 34294-1250, USA
| | - A Kazemi
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, P. O. Box 14155/6117, Amir Abad, Keshavarz Boulevard, Tehran, Iran
| | - S Shab-Bidar
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, P. O. Box 14155/6117, Amir Abad, Keshavarz Boulevard, Tehran, Iran.
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Tyrovola JB, Odont XX. The "Mechanostat Theory" of Frost and the OPG/RANKL/RANK System. J Cell Biochem 2016; 116:2724-9. [PMID: 26096594 DOI: 10.1002/jcb.25265] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 06/15/2015] [Indexed: 11/11/2022]
Abstract
Frost's great interest to elucidate the principles of action underlying skeletal deformities, during, and after growth, urged him to undertake an extensive study of the mammalian skeleton. He suggested that survival of the skeleton (but also of other tissues, such as fibrous tissue, hyaline cartilage, fibrocartilage, cementum, or dentin) requires the functional coordination of modeling and remodeling. Modeling adapts bone to overloads, by enhancing additions of new bone and by changing bone architecture, and remodeling adapts bone to underloads by removing bone next to marrow and conserving normally used bone. There exists a mechanism that monitors bone metabolism (longitudinal growth, bone modeling, and remodeling activities) in relation to mechanical usage, the "mechanostat." Recent literature has presented new information regarding the physiological procedure of osteoclast and osteoblast activation. It has been understood that the OPG/RANKL/RANK proteinic system regulates bone metabolism by exerting biological effects on osteoblasts or osteoclasts. The same proteinic network, also regulates alveolar remodeling during tooth movement, as well as physiological root resorption and root resorption during orthodontic tooth movement. The aim of the present review is the presentation and evaluation of recent information in the field of osteoclast and osteoblast biology, as regards to the "mechanostat theory" of Frost. An attempt will be made to elucidate, whether recent data can support this remarkable theory and reveal the biological mechanisms behind it.
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Affiliation(s)
- Joanna B Tyrovola
- DDS, MS, DrOdont, Orthodontist, University of Athens, Athens, Greece
| | - X X Odont
- University of Athens, Athens, Greece
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Yasutake Y, Mizokami A, Kawakubo-Yasukochi T, Chishaki S, Takahashi I, Takeuchi H, Hirata M. Long-term oral administration of osteocalcin induces insulin resistance in male mice fed a high-fat, high-sucrose diet. Am J Physiol Endocrinol Metab 2016; 310:E662-E675. [PMID: 26884384 DOI: 10.1152/ajpendo.00334.2015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 02/05/2016] [Indexed: 01/13/2023]
Abstract
Uncarboxylated osteocalcin (GluOC), a bone-derived hormone, regulates energy metabolism by stimulating insulin secretion, pancreatic β-cell proliferation, and adiponectin expression in adipocytes. Previously, we showed that long-term intermittent or daily oral administration of GluOC reduced the fasting blood glucose level, improved glucose tolerance, and increased the fasting serum insulin concentration as well as pancreatic β-cell area in female mice fed a normal or high-fat, high-sucrose diet. We have now performed similar experiments with male mice and found that such GluOC administration induced glucose intolerance, insulin resistance, and adipocyte hypertrophy in those fed a high-fat, high-sucrose diet. In addition, GluOC increased the circulating concentration of testosterone and reduced that of adiponectin in such mice. These phenotypes were not observed in male mice fed a high-fat, high-sucrose diet after orchidectomy, but they were apparent in orchidectomized male mice or intact female mice that were fed such a diet and subjected to continuous testosterone supplementation. Our results thus reveal a sex difference in the effects of GluOC on glucose homeostasis. Given that oral administration of GluOC has been considered a potentially safe and convenient option for the treatment or prevention of metabolic disorders, this sex difference will need to be taken into account in further investigations.
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Affiliation(s)
- Yu Yasutake
- Laboratory of Molecular and Cellular Biochemistry
- Division of Orthodontics, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Akiko Mizokami
- Laboratory of Molecular and Cellular Biochemistry
- OBT Research Center, and
| | - Tomoyo Kawakubo-Yasukochi
- Department of Immunological and Molecular Pharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan; and
| | | | - Ichiro Takahashi
- Division of Orthodontics, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Hiroshi Takeuchi
- Division of Applied Pharmacology, Kyushu Dental University, Kitakyushu, Japan
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Luo Y, Ma X, Hao Y, Xu Y, Xiong Q, Tang J, Pan X, Xiao Y, Bao Y, Jia W. Association between serum osteocalcin level and visceral obesity in Chinese postmenopausal women. Clin Endocrinol (Oxf) 2015; 83:429-34. [PMID: 25871789 DOI: 10.1111/cen.12793] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 01/03/2015] [Accepted: 04/09/2015] [Indexed: 01/08/2023]
Abstract
BACKGROUND A low serum osteocalcin level, visceral obesity and postmenopausal status are recognized risk factors for cardiovascular disease. OBJECTIVE We investigated the relationship between the serum osteocalcin level and visceral fat content in a population of Chinese postmenopausal women. DESIGN AND PATIENTS In total, 1481 postmenopausal women (mean age ± standard deviation, 57·1 ± 4·8 years) were selected from the Shanghai Obesity Study. MEASUREMENTS Abdominal fat accumulation was quantified using magnetic resonance imaging. Subjects with a visceral fat area (VFA) of ≥80 cm(2) were classified as abdominally obese. The total serum osteocalcin level was measured by electrochemiluminescence immunoassay. RESULTS The median serum osteocalcin level was 20·66 μg/l (interquartile range, 16·88-25·42 μg/l). The overall prevalence of abdominal obesity was 49·1% (n = 727). Abdominally obese subjects had lower serum osteocalcin levels than did nonabdominally obese subjects [19·14 (16·02-23·82) vs 21·97 (18·14-26·77) μg/l, respectively; P < 0·001]. Partial correlation analysis showed that the serum osteocalcin level was still negatively correlated with VFA after adjusting for age, years since menopause and body mass index (P < 0·01). Moreover, VFA was independently associated with the serum osteocalcin level after adjustment for confounding factors (P < 0·05). A low serum osteocalcin level was an independent risk factor for abdominal obesity (odds ratio, 0·972; 95% confidence interval, 0·953-0·991; P = 0·004). CONCLUSION The serum osteocalcin level was inversely correlated with the visceral fat content in these Chinese postmenopausal women.
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Affiliation(s)
- Yuqi Luo
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Xiaojing Ma
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Yaping Hao
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Yiting Xu
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Qin Xiong
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Junling Tang
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Xiaoping Pan
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Yunfeng Xiao
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yuqian Bao
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
| | - Weiping Jia
- Department of Endocrinology and Metabolism, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Clinical Center for Diabetes, Shanghai Key Clinical Center for Metabolic Disease, Shanghai Diabetes Institute, Shanghai Key Laboratory of Diabetes Mellitus, Shanghai, China
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Bauer NB, Khassawna TE, Goldmann F, Stirn M, Ledieu D, Schlewitz G, Govindarajan P, Zahner D, Weisweiler D, Schliefke N, Böcker W, Schnettler R, Heiss C, Moritz A. Characterization of bone turnover and energy metabolism in a rat model of primary and secondary osteoporosis. ACTA ACUST UNITED AC 2015; 67:287-96. [DOI: 10.1016/j.etp.2015.01.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/08/2015] [Indexed: 01/09/2023]
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Rasekhi H, Karandish M, Jalali MT, Mohammadshahi M, Zarei M, Saki A, Shahbazian H. Phylloquinone supplementation improves glycemic status independent of the effects of adiponectin levels in premonopause women with prediabetes: a double-blind randomized controlled clinical trial. J Diabetes Metab Disord 2015; 14:1. [PMID: 25654061 PMCID: PMC4316808 DOI: 10.1186/s40200-014-0127-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Accepted: 12/28/2014] [Indexed: 02/07/2023]
Abstract
BACKGROUND Vitamin K, as a cofactor in the gamma carboxylation of certain glutamic acid (Gla) residues, has been related to glucose metabolism and insulin sensitivity. Osteocalcin, also known as bone γ-carboxyglutamic acid, increases β-cell proliferation as well as insulin and adiponectin secretion, which improve glucose tolerance and insulin sensitivity. Thus, the purpose of the present study was to examine the possible role of adiponectin as a mediator of glucose homeostasis following phylloquinone supplementation in premonopause women with prediabetes. METHODS Eighty two women were randomized to consume vitamin k1 supplement (n = 39) or placebo (n = 43) for four weeks. Participants in vitamin K1 treatment group received one pearl softgel capsule containing 1000 micrograms phylloquinone while the placebo group received one placebo capsules daily for four weeks. The Blood samples were collected at baseline and after a four-week intervention to quantify osteocalcin, adiponectin, leptin and relevant variables. RESULTS Phylloquinone supplementation significantly increased serum adiponectin concentration (1.24 ± 1.90 compared with -0.27 ± 1.08 μg/ml), and did not alter total osteocalcin (0.50 ± 4.11 compared with 0.13 ± 1.85 ng/ml) and leptin (-0.29 ± 8.23 compared with -1.15 ± 5.25 ng/ml) compared with placebo. Adjustments for total osteocalcin and adiponectin using analysis of covariance (ANCOVA) did not affect the association of glycemic status with related variables. CONCLUSIONS In conclusion our study demonstrated that phylloquinone supplementation improved glycemic status in premonopausal prediabetic women independent of adiponectin. TRIAL REGISTRATION This trial was registered in Iranian Registry of Clinical Trials with ID number of IRCT2013120915724N1.
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Affiliation(s)
- Hamid Rasekhi
- Nutrition and Metabolic Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Majid Karandish
- Nutrition and Metabolic Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad-Taha Jalali
- Hyperlipidemia Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Majid Mohammadshahi
- Nutrition and Metabolic Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mehdi Zarei
- Department of Food Hygiene, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Azadeh Saki
- Department of Biostatistics and Epidemiology, School of Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hajieh Shahbazian
- Diabetes Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Ferron M, Lacombe J. Regulation of energy metabolism by the skeleton: Osteocalcin and beyond. Arch Biochem Biophys 2014; 561:137-46. [DOI: 10.1016/j.abb.2014.05.022] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 05/19/2014] [Accepted: 05/22/2014] [Indexed: 12/30/2022]
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Chen X, Wu Y, Liu L, Tian H, Yu X. Osteocalcin is inversely associated with glucose levels in middle-aged Tibetan men with different degrees of glucose tolerance. Diabetes Metab Res Rev 2014; 30:476-82. [PMID: 24339141 DOI: 10.1002/dmrr.2509] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 11/28/2013] [Accepted: 12/03/2013] [Indexed: 02/05/2023]
Abstract
BACKGROUND Research on the characteristics and mechanisms of diabetes in Tibetans is scant. Especially, there is no study on the relationship between osteocalcin and glucose metabolism. The objective of this study was to investigate the associations of serum total osteocalcin (tOC) and undercarboxylated osteocalcin (ucOC) with glucose and lipid metabolism in Chinese indigenous Tibetans with different degrees of glucose tolerance. METHODS In this study, 160 middle-aged Tibetan men were involved, including 46 subjects with normal glucose tolerance (NGT), 52 subjects with impaired glucose regulation (IGR) and 62 subjects with type 2 diabetes. The homeostasis model assessment (HOMA) parameters, including HOMA-IR and HOMA-B, were used to estimate insulin resistance and β-cell function, respectively. Adiponectin, leptin, testosterone, 1,25-dihydroxyvitamin D, tOC and ucOC were measured using ELISA kits. RESULTS After adjustment for age and body mass index, plasma tOC level was correlated negatively with fasting and 30-min post-OGTT glucose, HOMA-IR, leptin and testosterone; plasma ucOC level was correlated negatively with 30-min post-OGTT glucose, total cholesterol and 1,25-dihydroxyvitamin D; ucOC : tOC was correlated positively with leptin. The negative association between HOMA-IR and tOC remained significant after correcting for adiponectin; however, the association disappeared after correcting for leptin. HOMA-IR was correlated negatively with age, adiponectin and tOC, and positively with total cholesterol, triglyceride and leptin. Stepwise linear regression analysis revealed that total cholesterol, leptin and adiponectin were independent predictors for HOMA-IR in all subjects. CONCLUSIONS Our data support a link between osteocalcin and glucose metabolism in middle-aged Tibetan men. The improved glucose tolerance exerted by tOC may be related to improved insulin sensitivity rather than improved β-cell function.
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Affiliation(s)
- Xiang Chen
- Laboratory of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Kim KK, Suh HS, Hwang IC, Ko KD. Influence of eating behaviors on short-term weight loss by orlistat and anorectic agent. Eat Behav 2014; 15:87-90. [PMID: 24411757 DOI: 10.1016/j.eatbeh.2013.10.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 08/18/2013] [Accepted: 10/16/2013] [Indexed: 11/27/2022]
Abstract
Little data exists concerning whether eating behaviors determine the response to orlistat treatment, especially with added anorectic agents. This study was a sub-investigation of a 12-week randomized controlled trial for the additive effect of orlistat on sibutramine treatment. The analysis presented here was restricted to 98 women who had fulfilled the protocol. The Dutch eating behavior questionnaire and three-factor eating questionnaire were used to assess eating behaviors. Scores of emotional eating, external eating, disinhibition and hunger are significantly interrelated. Using multiple logistic analysis with adjustment for potential confounders, such as age, initial BMI and the other 2 eating behavior scores, traits of emotional eating (OR 0.30, 95% CI 0.13-0.74) and disinhibition (OR 0.61, 95% CI 0.40-0.82) have a significant influence on prediction for additional 5% weight loss in the treatment with orlistat and sibutramine. Subjects with less vulnerability to emotional cues had significantly more weight loss with orlistat treatment and anorectic agents.
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Affiliation(s)
- Kyoung Kon Kim
- Department of Family Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - Heuy Sun Suh
- Department of Family Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - In Cheol Hwang
- Department of Family Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea.
| | - Ki Dong Ko
- Department of Family Medicine, Gachon University Gil Medical Center, Incheon, Republic of Korea
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