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Zheng XQ, Lin JL, Huang J, Wu T, Song CL. Targeting aging with the healthy skeletal system: The endocrine role of bone. Rev Endocr Metab Disord 2023; 24:695-711. [PMID: 37402956 DOI: 10.1007/s11154-023-09812-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/29/2023] [Indexed: 07/06/2023]
Abstract
Aging is an inevitable biological process, and longevity may be related to bone health. Maintaining strong bone health can extend one's lifespan, but the exact mechanism is unclear. Bone and extraosseous organs, including the heart and brain, have complex and precise communication mechanisms. In addition to its load bearing capacity, the skeletal system secretes cytokines, which play a role in bone regulation of extraosseous organs. FGF23, OCN, and LCN2 are three representative bone-derived cytokines involved in energy metabolism, endocrine homeostasis and systemic chronic inflammation levels. Today, advanced research methods provide new understandings of bone as a crucial endocrine organ. For example, gene editing technology enables bone-specific conditional gene knockout models, which allows the study of bone-derived cytokines to be more precise. We systematically evaluated the various effects of bone-derived cytokines on extraosseous organs and their possible antiaging mechanism. Targeting aging with the current knowledge of the healthy skeletal system is a potential therapeutic strategy. Therefore, we present a comprehensive review that summarizes the current knowledge and provides insights for futures studies.
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Affiliation(s)
- Xuan-Qi Zheng
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Jia-Liang Lin
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Jie Huang
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Tong Wu
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China
| | - Chun-Li Song
- Department of Orthopaedics, Peking University Third Hospital, Beijing, China.
- Beijing Key Laboratory of Spinal Disease Research, Beijing, China.
- Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China.
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Matta RA, Farrage HM, Saedii AA, Abdelrahman MM. Male subclinical hypogonadism and late-onset hypergonadotrophic hypogonadism: mechanisms, endothelial function, and interplay between reproductive hormones, undercarboxylated osteocalcin, and endothelial dysfunction. Aging Male 2022; 25:72-87. [PMID: 35291927 DOI: 10.1080/13685538.2022.2049744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Pathogenesis and endothelial function in subclinical hypogonadism (SCH) remain unclear. Undercarboxylated osteocalcin (ucOC) participates in atherosclerosis and reproduction. We explored the underlying mechanisms and interplay of endothelial dysfunction, unOC and reproductive hormones in SCH and primary late-onset hypogonadism (LOH). METHODS In the SCH, LOH, and healthy eugonadal male groups, we measured serum unOC, calculated luteinizing hormone/testosterone (LH/T), LH.T product, and estradiol/T (E/T) as indicators of impaired Leydig cells, androgen sensitivity index (ASI), and aromatase activity, respectively (LH set-point regulators), and assessed flow-mediated dilation of the brachial artery (FMD%), carotid-intima media thickness (CIMT), and aortic stiffness (AS). RESULTS ↑LH/T, ↑ASI, ↓aromatase activity, normal T, follicle-stimulating hormone (FSH) and sex hormone-binding globulin (SHBG) levels, ↑unOC, and enhanced atherosclerotic markers (↓FMD%, ↑CIMT, ↑AS) are characteristics of SCH. Testosterone was positively correlated with FMD% in SCH. The independent predictors were: SHBG and LH for FMD% and CIMT, respectively, and LH/T, ucOC, FSH, estradiol, and E/T ratio for AS in the LOH group; and LH for FMD% & AS and LH and LH/T for CIMT in all study subjects. CONCLUSIONS SCH is a distinct clinical entity characterized by impaired androgen sensitivity and aromatase activity, compensatory elevated unOC, endothelial dysfunction, and anti-atherogenic role of testosterone.
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Affiliation(s)
- Ragaa Abedelshaheed Matta
- Diabetes and Endocrinology Unit, Department of Internal Medicine, Faculty of Medicine, Minia University, Minia, Egypt
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Jawich K, Rocca MS, Al Fahoum S, Alhalabi M, Di Nisio A, Foresta C, Ferlin A, De Toni L. RS 2247911 polymorphism of GPRC6A gene and serum undercarboxylated-osteocalcin are associated with testis function. J Endocrinol Invest 2022; 45:1673-1682. [PMID: 35482214 DOI: 10.1007/s40618-022-01803-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/07/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE Undercarboxylated-Osteocalcin (ucOCN), acting on its putative receptor GPRC6A, was shown to stimulate testosterone (T) production by Leydig cells in rodents, in parallel with the hypothalamus-pituitary-gonadal axis (HPG) mediated by luteinizing hormone (LH). The aim of this cross-sectional study was to evaluate the association among serum ucOCN, rs2247911 polymorphism of GPRC6A gene and the endocrine/semen pattern in a cohort of infertile males, possibly identifying an involvement of the ucOCN-GPRC6A axis on testis function. METHODS 190 males, including 74 oligozoospermic subjects, 58 azoosperminc patients and 58 normozoospermic controls, were prospectively recruited at the Orient Hospital for Infertility, Assisted Reproduction and Genetics in Syria (Study N. 18FP), from July 2018 to June 2020. Outpatient evaluation included the clinical history, anthropometrics and a fasting blood sampling for hormonals, serum OCN (both carboxylated and undercarboxylated), glycemic and lipid profile and screening for rs2247911 GPRC6A gene polymorphism. RESULTS Higher serum ucOCN associated with higher T and HDL-cholesterol (respectively: r = 0.309, P < 0.001 and r = 0.248, P = 0.001), and with lower FSH (r = - 0.327, P < 0.001) and LDL-cholesterol (r = - 0.171; P = 0.018). Patients bearing the GG genotype of rs2247911 had higher sperm count compared to GA genotype (P = 0.043) and, compared to both AG and AA genotypes, had higher serum T (P = 0.004, P = 0.001) and lower triglycerides levels (P = 0.002, P < 0.001). Upon normalization for LH levels and body mass index, rs2274911 and ucOCN were significantly associated with higher serum T at linear stepwise regression analysis (P = 0.013, P = 0.007). CONCLUSIONS Our data suggest the involvement of ucOCN-GPRC6A axis in the regulation of T production by the testis, subsidiary to HPG.
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Affiliation(s)
- K Jawich
- Department of Biochemistry and Microbiology, Faculty of Pharmacy, Damascus University, Damascus, Syrian Arab Republic
| | - M Santa Rocca
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padua, Italy
- Unit of Andrology and Reproductive Medicine, University Hospital of Padova, Padua, Italy
| | - S Al Fahoum
- Department of Biochemistry and Microbiology, Faculty of Pharmacy, Damascus University, Damascus, Syrian Arab Republic.
| | - M Alhalabi
- Department of Embryology and Reproductive Medicine, Faculty of Medicine, Damascus University, Damascus, Syrian Arab Republic
| | - A Di Nisio
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padua, Italy
| | - C Foresta
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padua, Italy
| | - A Ferlin
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padua, Italy
| | - L De Toni
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padua, Italy
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Takashi Y, Kawanami D. The Role of Bone-Derived Hormones in Glucose Metabolism, Diabetic Kidney Disease, and Cardiovascular Disorders. Int J Mol Sci 2022; 23:ijms23042376. [PMID: 35216490 PMCID: PMC8879859 DOI: 10.3390/ijms23042376] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/16/2022] [Accepted: 02/19/2022] [Indexed: 12/19/2022] Open
Abstract
Bone contributes to supporting the body, protecting the central nervous system and other organs, hematopoiesis, the regulation of mineral metabolism (mainly calcium and phosphate), and assists in respiration. Bone has many functions in the body. Recently, it was revealed that bone also works as an endocrine organ and secretes several systemic humoral factors, including fibroblast growth factor 23 (FGF23), osteocalcin (OC), sclerostin, and lipocalin 2. Bone can communicate with other organs via these hormones. In particular, it has been reported that these bone-derived hormones are involved in glucose metabolism and diabetic complications. Some functions of these bone-derived hormones can become useful biomarkers that predict the incidence of diabetes and the progression of diabetic complications. Furthermore, other functions are considered to be targets for the prevention or treatment of diabetes and its complications. As is well known, diabetes is now a worldwide health problem, and many efforts have been made to treat diabetes. Thus, further investigations of the endocrine system through bone-derived hormones may provide us with new perspectives on the prediction, prevention, and treatment of diabetes. In this review, we summarize the role of bone-derived hormones in glucose metabolism, diabetic kidney disease, and cardiovascular disorders.
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Bargieł W, Cierpiszewska K, Maruszczak K, Pakuła A, Szwankowska D, Wrzesińska A, Gutowski Ł, Formanowicz D. Recognized and Potentially New Biomarkers-Their Role in Diagnosis and Prognosis of Cardiovascular Disease. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:medicina57070701. [PMID: 34356982 PMCID: PMC8305174 DOI: 10.3390/medicina57070701] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/03/2021] [Accepted: 07/04/2021] [Indexed: 01/08/2023]
Abstract
Atherosclerosis and its consequences are the leading cause of mortality in the world. For this reason, we have reviewed atherosclerosis biomarkers and selected the most promising ones for review. We focused mainly on biomarkers related to inflammation and oxidative stress, such as the highly sensitive C-reactive protein (hs-CRP), interleukin 6 (IL-6), and lipoprotein-associated phospholipase A2 (Lp-PLA2). The microRNA (miRNA) and the usefulness of the bone mineralization, glucose, and lipid metabolism marker osteocalcin (OC) were also reviewed. The last biomarker we considered was angiogenin (ANG). Our review shows that due to the multifactorial nature of atherosclerosis, no single marker is known so far, the determination of which would unambiguously assess the severity of atherosclerosis and help without any doubt in the prognosis of cardiovascular risk.
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Affiliation(s)
- Weronika Bargieł
- Faculty of Medicine, Poznan University of Medical Sciences, 60-812 Poznan, Poland; (W.B.); (K.C.); (K.M.); (A.P.); (D.S.); (A.W.)
| | - Katarzyna Cierpiszewska
- Faculty of Medicine, Poznan University of Medical Sciences, 60-812 Poznan, Poland; (W.B.); (K.C.); (K.M.); (A.P.); (D.S.); (A.W.)
| | - Klara Maruszczak
- Faculty of Medicine, Poznan University of Medical Sciences, 60-812 Poznan, Poland; (W.B.); (K.C.); (K.M.); (A.P.); (D.S.); (A.W.)
| | - Anna Pakuła
- Faculty of Medicine, Poznan University of Medical Sciences, 60-812 Poznan, Poland; (W.B.); (K.C.); (K.M.); (A.P.); (D.S.); (A.W.)
| | - Dominika Szwankowska
- Faculty of Medicine, Poznan University of Medical Sciences, 60-812 Poznan, Poland; (W.B.); (K.C.); (K.M.); (A.P.); (D.S.); (A.W.)
| | - Aleksandra Wrzesińska
- Faculty of Medicine, Poznan University of Medical Sciences, 60-812 Poznan, Poland; (W.B.); (K.C.); (K.M.); (A.P.); (D.S.); (A.W.)
| | - Łukasz Gutowski
- Department of Medical Chemistry and Laboratory Medicine, Poznan University of Medical Sciences, Rokietnicka 8, 60-806 Poznan, Poland;
| | - Dorota Formanowicz
- Department of Medical Chemistry and Laboratory Medicine, Poznan University of Medical Sciences, Rokietnicka 8, 60-806 Poznan, Poland;
- Correspondence:
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Hiam D, Landen S, Jacques M, Voisin S, Alvarez-Romero J, Byrnes E, Chubb P, Levinger I, Eynon N. Osteocalcin and its forms respond similarly to exercise in males and females. Bone 2021; 144:115818. [PMID: 33338665 DOI: 10.1016/j.bone.2020.115818] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/09/2020] [Accepted: 12/13/2020] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Acute exercise increases osteocalcin (OC), a marker of bone turnover, and in particular the undercarboxylated form (ucOC). Males and females differ in baseline levels of total OC and it is thought the hormonal milieu may be driving these differences. Males and females adapt differently to the same exercise intervention, however it is unclear whether the exercise effects on OC are also sex-specific. We tested whether the responses of OC and its forms to acute High Intensity Interval Exercise (HIIE) and High Intensity Interval Training (HIIT) differed between males and females. Secondly, we examined whether sex hormones vary with OC forms within sexes to understand if these are driving factor in any potential sex differences. METHODS Total OC (tOC), undercarboxylated OC (ucOC), and carboxylated OC (cOC) were measured in serum of 96 healthy participants from the Gene SMART cohort (74 males and 22 females) at rest, immediately after, and 3 h after a single bout of HIIE, and at rest, 48 h after completing a four week HIIT intervention. Baseline testosterone and estradiol were also measured for a subset of the cohort (Males = 38, Females = 20). Linear mixed models were used to a) uncover the sex-specific effects of acute exercise and short-term training on OC forms and b) to examine whether the sex hormones were associated with OC levels. RESULTS At baseline, males had higher levels of tOC, cOC, and ucOC than females (q < 0.01). In both sexes tOC, and ucOC increased to the same extent after acute HIIE. At baseline, in males only, higher testosterone was associated with higher ucOC (β = 3.37; q < 0.046). Finally, tOC and ucOC did not change following 4 weeks of HIIT. CONCLUSION/DISCUSSION While there were no long-term changes in OC and its forms. tOC and ucOC were transiently enhanced after a bout of HIIE similarly in both sexes. This may be important in metabolic signalling in skeletal muscle and bone suggesting that regular exercise is needed to maintain these benefits. Overall, these data suggest that the sex differences in exercise adaptations do not extend to the bone turnover marker, OC.
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Affiliation(s)
- D Hiam
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia
| | - S Landen
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia
| | - M Jacques
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia
| | - S Voisin
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia
| | - J Alvarez-Romero
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia
| | - E Byrnes
- PathWest Laboratory Medicine, QEII Medical Centre, Perth, Australia
| | - P Chubb
- PathWest Laboratory Medicine, Fiona Stanley Hospital, Perth, Australia
| | - I Levinger
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia; Australian Institute for Musculoskeletal Science (AIMSS), Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, Melbourne, VIC, Australia
| | - N Eynon
- Institute for Health and Sport (iHeS), Victoria University, Melbourne, Australia; Murdoch Children's Research Institute, Melbourne, Australia.
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Wang H, Zheng X, Zhang Y, Huang J, Zhou W, Li X, Tian H, Wang B, Xing D, Fu W, Chen T, Wang X, Zhang X, Wu A. The endocrine role of bone: Novel functions of bone-derived cytokines. Biochem Pharmacol 2020; 183:114308. [PMID: 33137323 DOI: 10.1016/j.bcp.2020.114308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/18/2020] [Accepted: 10/27/2020] [Indexed: 02/08/2023]
Abstract
Bone-derived cytokines refer to various proteins and peptides that are released from the skeleton and can distribute in organisms to regulate homeostasis by targeting many organs, such as the pancreas, brain, testicles, and kidneys. In addition to providing support and movement, many studies have disclosed the novel endocrine function of bone, and bone can modulate glucose and energy metabolism as well as phosphate metabolism by versatile bone-derived cytokines. However, this specific exoskeletonfunction of bone-derived cytokines in the regulation of homeostasis and the pathological response caused by skeletal dysfunction are still not very clear, and elucidation of the above mechanisms is of great significance for understanding the pathological processes of metabolic disorders and in the search for novel therapeutic measures for maintaining organ stability and physical fitness.
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Affiliation(s)
- Hui Wang
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xuanqi Zheng
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yan Zhang
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Jinfeng Huang
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Wenxian Zhou
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xunlin Li
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, PR China
| | - Haijun Tian
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, PR China
| | - Bin Wang
- Department of Sports Medicine and Adult Reconstruction Surgery, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210009, China
| | - Dan Xing
- Arthritis Clinic & Research Center, Peking University People's Hospital, Peking University, Beijing 100044, China
| | - Weili Fu
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, China
| | - Tao Chen
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiangyang Wang
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Xiaolei Zhang
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.
| | - Aimin Wu
- Department of Orthopaedics, Zhejiang Provincial Key Laboratory of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.
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Suchacki KJ, Morton NM, Vary C, Huesa C, Yadav MC, Thomas BJ, Turban S, Bunger L, Ball D, Barrios-Llerena ME, Guntur AR, Khavandgar Z, Cawthorn WP, Ferron M, Karsenty G, Murshed M, Rosen CJ, MacRae VE, Millán JL, Farquharson C. PHOSPHO1 is a skeletal regulator of insulin resistance and obesity. BMC Biol 2020; 18:149. [PMID: 33092598 PMCID: PMC7584094 DOI: 10.1186/s12915-020-00880-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 09/25/2020] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND The classical functions of the skeleton encompass locomotion, protection and mineral homeostasis. However, cell-specific gene deletions in the mouse and human genetic studies have identified the skeleton as a key endocrine regulator of metabolism. The bone-specific phosphatase, Phosphatase, Orphan 1 (PHOSPHO1), which is indispensable for bone mineralisation, has been recently implicated in the regulation of energy metabolism in humans, but its role in systemic metabolism remains unclear. Here, we probe the mechanism underlying metabolic regulation by analysing Phospho1 mutant mice. RESULTS Phospho1-/- mice exhibited improved basal glucose homeostasis and resisted high-fat-diet-induced weight gain and diabetes. The metabolic protection in Phospho1-/- mice was manifested in the absence of altered levels of osteocalcin. Osteoblasts isolated from Phospho1-/- mice were enriched for genes associated with energy metabolism and diabetes; Phospho1 both directly and indirectly interacted with genes associated with glucose transport and insulin receptor signalling. Canonical thermogenesis via brown adipose tissue did not underlie the metabolic protection observed in adult Phospho1-/- mice. However, the decreased serum choline levels in Phospho1-/- mice were normalised by feeding a 2% choline rich diet resulting in a normalisation in insulin sensitivity and fat mass. CONCLUSION We show that mice lacking the bone mineralisation enzyme PHOSPHO1 exhibit improved basal glucose homeostasis and resist high-fat-diet-induced weight gain and diabetes. This study identifies PHOSPHO1 as a potential bone-derived therapeutic target for the treatment of obesity and diabetes.
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Affiliation(s)
- Karla J Suchacki
- Roslin Institute, R(D)SVS, University of Edinburgh, Edinburgh, Scotland, UK. .,Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, Scotland, UK.
| | - Nicholas M Morton
- Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, Scotland, UK
| | - Calvin Vary
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Carmen Huesa
- Roslin Institute, R(D)SVS, University of Edinburgh, Edinburgh, Scotland, UK.,MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, Scotland, UK
| | - Manisha C Yadav
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, USA
| | - Benjamin J Thomas
- Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, Scotland, UK
| | - Sophie Turban
- Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, Scotland, UK
| | - Lutz Bunger
- Scottish Rural College, Edinburgh, Scotland, UK
| | - Derek Ball
- Medical Sciences and Nutrition, School of Medicine, University of Aberdeen, Aberdeen, Scotland, UK
| | | | - Anyonya R Guntur
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Zohreh Khavandgar
- Department of Medicine and Faculty of Dentistry, McGill University, Montreal, Canada
| | - William P Cawthorn
- Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh, EH16 4TJ, Scotland, UK
| | - Mathieu Ferron
- Molecular Physiology Research Unit, Institut de recherches cliniques de Montréal, Montreal, Canada
| | - Gérard Karsenty
- Department of Genetics and Development, Columbia University Medical Center, New York, USA
| | - Monzur Murshed
- Department of Medicine and Faculty of Dentistry, McGill University, Montreal, Canada
| | - Clifford J Rosen
- Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - Vicky E MacRae
- Roslin Institute, R(D)SVS, University of Edinburgh, Edinburgh, Scotland, UK
| | - Jose Luis Millán
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, USA
| | - Colin Farquharson
- Roslin Institute, R(D)SVS, University of Edinburgh, Edinburgh, Scotland, UK
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Rossi M, Battafarano G, Pepe J, Minisola S, Del Fattore A. The Endocrine Function of Osteocalcin Regulated by Bone Resorption: A Lesson from Reduced and Increased Bone Mass Diseases. Int J Mol Sci 2019; 20:ijms20184502. [PMID: 31514440 PMCID: PMC6769834 DOI: 10.3390/ijms20184502] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/10/2019] [Accepted: 09/10/2019] [Indexed: 02/06/2023] Open
Abstract
Bone is a peculiar tissue subjected to a continuous process of self-renewal essential to assure the integrity of the skeleton and to explicate the endocrine functions. The study of bone diseases characterized by increased or reduced bone mass due to osteoclast alterations has been essential to understand the great role played by osteocalcin in the endocrine functions of the skeleton. The ability of osteoclasts to regulate the decarboxylation of osteocalcin and to control glucose metabolism, male fertility, and cognitive functions was demonstrated by the use of animal models. In this review we described how diseases characterized by defective and increased bone resorption activity, as osteopetrosis and osteoporosis, were essential to understand the involvement of bone tissue in whole body physiology. To translate this knowledge into humans, recently published reports on patients were described, but further studies should be performed to confirm this complex hormonal regulation in humans.
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Affiliation(s)
- Michela Rossi
- Bone Physiopathology Group, Multifactorial Disease and Complex Phenotype Research Area, Bambino Gesù Children's Hospital, IRCCS, 00146 Rome, Italy.
| | - Giulia Battafarano
- Bone Physiopathology Group, Multifactorial Disease and Complex Phenotype Research Area, Bambino Gesù Children's Hospital, IRCCS, 00146 Rome, Italy.
| | - Jessica Pepe
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, 00186 Rome, Italy.
| | - Salvatore Minisola
- Department of Internal Medicine and Medical Disciplines, Sapienza University of Rome, 00186 Rome, Italy.
| | - Andrea Del Fattore
- Bone Physiopathology Group, Multifactorial Disease and Complex Phenotype Research Area, Bambino Gesù Children's Hospital, IRCCS, 00146 Rome, Italy.
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10
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Takashi Y, Ishizu M, Mori H, Miyashita K, Sakamoto F, Katakami N, Matsuoka TA, Yasuda T, Hashida S, Matsuhisa M, Kuroda A. Circulating osteocalcin as a bone-derived hormone is inversely correlated with body fat in patients with type 1 diabetes. PLoS One 2019; 14:e0216416. [PMID: 31050684 PMCID: PMC6499427 DOI: 10.1371/journal.pone.0216416] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 04/21/2019] [Indexed: 02/06/2023] Open
Abstract
The objective of the present study was to investigate the correlations between serum undercarboxylated osteocalcin (ucOC) or osteocalcin (OC) concentrations and %body fat, serum adiponectin and free-testosterone concentration, muscle strength and dose of exogenous insulin in patients with type 1 diabetes. We recruited 73 Japanese young adult patients with childhood-onset type 1 diabetes. All participants were receiving insulin replacement therapy. The correlations between logarithmic serum ucOC or OC concentrations and each parameter were examined. Serum ucOC and OC concentrations were inversely correlated with %body fat (r = -0.319, P = 0.007; r = -0.321, P = 0.006, respectively). Furthermore, multiple linear regression analyses were performed to determine whether or not serum ucOC or OC concentrations were factors associated with %body fat. Serum ucOC and OC concentrations remained significant factors even after adjusting for gender, HbA1c, body weight-adjusted total daily dose of insulin and duration of diabetes (β = -0.260, P = 0.027; β = -0.254, P = 0.031, respectively). However, serum ucOC and OC concentrations were not correlated with serum adiponectin or free-testosterone concentrations, muscle strength or dose of exogenous insulin. In conclusion, our study demonstrates the inverse correlation between serum ucOC or OC concentrations and body fat in patients with type 1 diabetes.
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Affiliation(s)
- Yuichi Takashi
- Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
| | - Masashi Ishizu
- Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
- Department of Hematology, Endocrinology and Metabolism, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - Hiroyasu Mori
- Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
| | - Kazuyuki Miyashita
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Fumie Sakamoto
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Naoto Katakami
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Taka-aki Matsuoka
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tetsuyuki Yasuda
- Department of Diabetes and Endocrinology, Osaka Police Hospital, Osaka, Japan
| | - Seiichi Hashida
- Institute for Health Sciences, Tokushima Bunri University, Tokushima, Japan
| | - Munehide Matsuhisa
- Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
- * E-mail:
| | - Akio Kuroda
- Diabetes Therapeutics and Research Center, Institute of Advanced Medical Sciences, Tokushima University, Tokushima, Japan
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11
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Lu Y, Li J, Cheng X, Li N, Miao X, Sun B, Yan S, Li C. Testosterone level in aging male with different glucose tolerance state and its association with osteocalcin. Aging Male 2019; 22:68-73. [PMID: 30039993 DOI: 10.1080/13685538.2018.1481940] [Citation(s) in RCA: 5] [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] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVE To investigate the relationship of testosterone and different glucose tolerance state, and its association with osteocalcin. METHODS A cross-sectional study was conducted of 1176 males aged 60-97 years who were arranged for an annual regular checkup from March to May 2012 in Chinese PLA general hospital in Beijing. RESULTS Individuals categorized as having prediabetes or diabetes were more likely to have lower osteocalcin, testosterone, and SHBG levels compared to those with normal glucose tolerance (p < .05 in males). In aging males, after adjusting for age, the negative association between osteocalcin and BMI, waist circumference, FPG, 2hPBG, or TG were significant. And serum TT was negatively associated with BMI, waist circumference, FPG, 2hPBG, or TG independent of age, ALP, Ca, P, VitD, and PTH. CONCLUSIONS It showed that serum osteocalcin and TT were closely related with BMI, blood glucose, and TG, which supported the hypothesis that regulation of bone remodeling, energy metabolism, and reproduction are linked.
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Affiliation(s)
- Yanhui Lu
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Jian Li
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Xiaoling Cheng
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Nan Li
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Xinyu Miao
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Banruo Sun
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Shuangtong Yan
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
| | - Chunlin Li
- a Department of Geriatric Endocrinology, Nanlou Division , Chinese PLA General Hospital, National Clinical Research Center for Geriatric Diseases , Beijing , China
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12
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Barbonetti A, D'Andrea S, Samavat J, Martorella A, Felzani G, Francavilla S, Luconi M, Francavilla F. Can the positive association of osteocalcin with testosterone be unmasked when the preeminent hypothalamic-pituitary regulation of testosterone production is impaired? The model of spinal cord injury. J Endocrinol Invest 2019; 42:167-173. [PMID: 29729005 DOI: 10.1007/s40618-018-0897-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Accepted: 04/23/2018] [Indexed: 01/16/2023]
Abstract
PURPOSE Osteocalcin (OCN), released from the bone matrix during the resorption phase, in its undercarboxylated form, stimulates testosterone (T) biosynthesis in mouse and a loss-of-function mutation of its receptor was associated with hypergonadotropic hypogonadism in humans. Nevertheless, when population-based studies have explored the OCN-T association, conflicting results have been reported. Hypothesizing that the evidence of a positive association between OCN and T could have been hindered by the preeminent role of a well-functioning hypothalamus-pituitary axis in promoting T biosynthesis, we explored this association in men with chronic spinal cord injury (SCI), exhibiting high prevalence of non-hypergonadotropic androgen deficiency. METHODS Fifty-five consecutive men with chronic SCI underwent clinical/biochemical evaluations, including measurements of total T (TT), OCN and 25(OH)D levels. Free T (FT) levels were calculated by the Vermeulen formula. Comorbidity was scored by Charlson comorbidity index (CCI). RESULTS A biochemical androgen deficiency (TT < 300 ng/dL) was observed in 15 patients (27.3%). TT was positively correlated with OCN, 25(OH)D and leisure time physical activity and negatively correlated with age, BMI and CCI. OCN was also positively correlated with calculated FT and negatively correlated with BMI and HOMA-IR. At the multiple linear regression analyses, a positive association of OCN with TT and calculated FT persisted after adjustment for confounders. CONCLUSIONS The positive association here found between OCN and T levels in men with chronic SCI reinforces the notion that a bone-testis axis is also functioning in humans and suggests that it can be unmasked when the preeminent hypothalamic-pituitary regulation of T production is impaired.
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Affiliation(s)
- A Barbonetti
- Spinal Unit, San Raffaele Sulmona Institute, 67039, Sulmona, Italy.
| | - S D'Andrea
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - J Samavat
- Endocrinology Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50139, Florence, Italy
| | - A Martorella
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - G Felzani
- Spinal Unit, San Raffaele Sulmona Institute, 67039, Sulmona, Italy
| | - S Francavilla
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L'Aquila, 67100, L'Aquila, Italy
| | - M Luconi
- Endocrinology Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, 50139, Florence, Italy
| | - F Francavilla
- Andrology Unit, Department of Life, Health and Environment Sciences, University of L'Aquila, 67100, L'Aquila, Italy
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13
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Yang YY, Zheng SC, Wang WC, Yang ZW, Shan C, Zhang YW, Qi Y, Chen YH, Gu WQ, Wang WQ, Zhao HY, Liu JM, Sun SY. Osteocalcin Levels in Male Idiopathic Hypogonadotropic Hypogonadism: Relationship With the Testosterone Secretion and Metabolic Profiles. Front Endocrinol (Lausanne) 2019; 10:687. [PMID: 31681165 PMCID: PMC6798147 DOI: 10.3389/fendo.2019.00687] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 09/23/2019] [Indexed: 11/13/2022] Open
Abstract
Idiopathic hypogonadotropic hypogonadism (IHH) patients are characterized by the absence of puberty and varying degrees of deteriorated metabolic conditions. Osteocalcin (OC) could regulate testosterone secretion and energy metabolism, but it remains unknown whether such an effect exists in IHH patients. Our study is aimed to examine the relationship between serum OC levels with testosterone and its responsiveness to gonadotropin stimulation and metabolic profiles in male IHH patients. A total of 99 male patients aged 18-37 years and diagnosed with IHH were enrolled in the current study, and the relationships between OC and testicular volume, baseline total testosterone (TT), free testosterone (FT), and peak TT (Tmax) levels after human chorionic gonadotropin (hCG) stimulation, gonadotropin responsiveness index (GRI), which is calculated by dividing Tmax by testicular volume, as well as metabolic profiles, such as 2-h post-challenge glucose (2hPG) and fat percentage (fat%), were analyzed. The results showed that OC had an independent negative relationship with testicular volume (r = -0.253, P = 0.012) and a positive association with Tmax (r = 0.262, P = 0.014) after adjusting for confounders. In addition, OC was a major determinant of GRI (adjusted R 2 for the model = 0.164, P = 0.012), fat% (adjusted R 2 for the model = 0.100, P = 0.004), and 2hPG (adjusted R 2 for the model = 0.054, P = 0.013) in IHH patients. In conclusion, OC is associated with testosterone secretion upon gonadotropin stimulation, glucose metabolism, and fat mass variations in IHH. This study was registered at clinicaltrials.gov (NCT02310074).
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Affiliation(s)
- Yu-Ying Yang
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Si-Chang Zheng
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Wen-Cui Wang
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Zu-Wei Yang
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Chang Shan
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Yu-Wen Zhang
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Rui-jin Hospital North, Shanghai, China
| | - Yan Qi
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Rui-jin Hospital North, Shanghai, China
| | - Yu-Hong Chen
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Rui-jin Hospital North, Shanghai, China
| | - Wei-Qiong Gu
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Wei-Qing Wang
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Hong-Yan Zhao
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
| | - Jian-Min Liu
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
- *Correspondence: Jian-Min Liu
| | - Shou-Yue Sun
- Department of Endocrine and Metabolic Diseases, Shanghai Clinical Center for Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Shanghai Institute of Endocrine and Metabolic Diseases, Rui-jin Hospital, Shanghai, China
- Department of Endocrine and Metabolic Diseases, Shanghai Jiao-Tong University School of Medicine, Rui-jin Hospital North, Shanghai, China
- Shou-Yue Sun
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Abstract
The maintenance of our physiological functions and their adaptive response to environmental changes depend on precise crosstalk between organs. Recent advances in mouse genetics have helped demonstrate that this holistic view of physiology extends to the skeletal system, where many unexpected signaling axes are found to play essential roles affecting numerous organs. After being long regarded as a static tissue, functioning merely as a structural support system, the skeleton has seen its image evolve into a much more complex picture. The skeleton reveals itself as a key endocrine organ for the homeostasis of our body, both by its central position in our body, but also by the large number of physiological functions it influences. In this review, we discuss the multiple endocrine roles of osteocalcin, an osteoclast-derived molecule (Ocn), where its functional importance has steadily increased over the last 15 years.
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Affiliation(s)
- Julien Oury
- Center for biology and medicine, Skirball institute of biomolecular medicine, New York university medical school, New York, 10016, États-Unis
| | - Franck Oury
- Inserm U1151, Institut Necker-Enfants Malades (INEM), Département Croissance et signalisation, équipe 14, université Paris Descartes Sorbone-Paris Cité, 14, rue Maria Helena Vieira Da Silva, 75014 Paris, France
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15
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Miyake H, Kanazawa I, Sugimoto T. Association of Bone Mineral Density, Bone Turnover Markers, and Vertebral Fractures with All-Cause Mortality in Type 2 Diabetes Mellitus. Calcif Tissue Int 2018; 102:1-13. [PMID: 28965188 DOI: 10.1007/s00223-017-0324-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/05/2017] [Indexed: 01/01/2023]
Abstract
Patients with type 2 diabetes mellitus (T2DM) have an increased risk of fragility fracture. However, the association between diabetes-related osteoporosis and mortality in T2DM remains unknown. This historical cohort study assessed the endpoint of all-cause mortality in patients with T2DM. According to our hospital record, bone parameters were examined in 797 patients from 1997 to 2009. We excluded 78 because of diseases affecting bone metabolism and could not follow-up 308 patients. Finally, in 411 patients, the associations of bone turnover markers, bone mineral density (BMD), and the prevalence of vertebral fractures with mortality were investigated by Cox regression analyses adjusted for confounding factors. Of 411 patients, 56 died during the follow-up period of almost 7 years. Cox regression analyses showed that reduced BMD at the lumbar spine (LS) and femoral neck (FN) (T-score ≤ -2.5) and severe vertebral fractures were associated with higher mortality (hazard ratio [HR] 3.25, 95% confidence interval [CI] 1.48-7.16, p = 0.003 for LS-T score ≤ -2.5; HR 5.19, 95% CI 1.83-14.75, p = 0.002 for FN-T score ≤ -2.5; HR 2.93, 95% CI 1.42-6.02, p = 0.004 for multiple vertebral fractures; HR 7.64, 95% CI 2.13-27.42, p = 0.002 for grade 3 vertebral fracture). Separate analysis in men and women showed that decreased serum osteocalcin was associated with mortality in women (HR 3.82, 95% CI 1.01-14.46 per SD decrease, p = 0.048). The present study is the first to show the association of reduced BMD and severe vertebral fractures with increased all-cause mortality in patients with T2DM. Moreover, higher serum osteocalcin was significantly associated with decreased mortality in women with T2DM.
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Affiliation(s)
- Hitomi Miyake
- Department of Internal Medicine 1, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, 693-8501, Japan
| | - Ippei Kanazawa
- Department of Internal Medicine 1, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, 693-8501, Japan.
| | - Toshitsugu Sugimoto
- Department of Internal Medicine 1, Faculty of Medicine, Shimane University, 89-1 Enya-cho, Izumo, 693-8501, Japan
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16
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Park YE, Musson DS, Naot D, Cornish J. Cell–cell communication in bone development and whole-body homeostasis and pharmacological avenues for bone disorders. Curr Opin Pharmacol 2017; 34:21-35. [DOI: 10.1016/j.coph.2017.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 03/07/2017] [Accepted: 04/06/2017] [Indexed: 12/11/2022]
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17
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De Toni L, Di Nisio A, Rocca MS, De Rocco Ponce M, Ferlin A, Foresta C. Osteocalcin, a bone-derived hormone with important andrological implications. Andrology 2017; 5:664-670. [PMID: 28395130 DOI: 10.1111/andr.12359] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/08/2017] [Accepted: 02/19/2017] [Indexed: 01/01/2023]
Abstract
Increasing evidence disclosed the existence of a novel multi-organ endocrine pathway, involving bone, pancreas and testis, of high penetrance in energy metabolism and male fertility. The main mediator of this axis is undercarboxylated osteocalcin (ucOC), a bone-derived protein-exerting systemic effects on tissues expressing the metabotropic receptor GPRC6A. The recognized effects of ucOC are the improvement of insulin secretion from the pancreas, the amelioration of systemic insulin sensitivity, in particular in skeletal muscle, and the stimulation of the global endocrine activity of the Leydig cell, including vitamin D 25-hydroxylation and testosterone production. The supporting evidence of this circuit in both animal and human models is here reviewed, with particular emphasis on the role of ucOC on testis function. The possible pharmacological modulation of this hormonal circuit for therapeutic aims is also discussed.
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Affiliation(s)
- L De Toni
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
| | - A Di Nisio
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
| | - M S Rocca
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
| | - M De Rocco Ponce
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
| | - A Ferlin
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
| | - C Foresta
- Department of Medicine, Unit of Andrology and Reproductive Medicine, University of Padova, Padova, Italy
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18
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Millar SA, Patel H, Anderson SI, England TJ, O’Sullivan SE. Osteocalcin, Vascular Calcification, and Atherosclerosis: A Systematic Review and Meta-analysis. Front Endocrinol (Lausanne) 2017; 8:183. [PMID: 28824544 PMCID: PMC5534451 DOI: 10.3389/fendo.2017.00183] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 07/12/2017] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Osteocalcin (OC) is an intriguing hormone, concomitantly being the most abundant non-collagenous peptide found in the mineralized matrix of bone, and expanding the endocrine function of the skeleton with far-reaching extra-osseous effects. A new line of enquiry between OC and vascular calcification has emerged in response to observations that the mechanism of vascular calcification resembles that of bone mineralisation. To date, studies have reported mixed results. This systematic review and meta-analysis aimed to identify any association between OC and vascular calcification and atherosclerosis. METHODS AND RESULTS Databases were searched for original, peer reviewed human studies. A total of 1,453 articles were retrieved, of which 46 met the eligibility criteria. Overall 26 positive, 17 negative, and 29 neutral relationships were reported for assessments between OC (either concentration in blood, presence of OC-positive cells, or histological staining for OC) and extent of calcification or atherosclerosis. Studies that measured OC-positive cells or histological staining for OC reported positive relationships (11 studies). A higher percentage of Asian studies found a negative relationship (36%) in contrast to European studies (6%). Studies examining carboxylated and undercarboxylated forms of OC in the blood failed to report consistent results. The meta-analysis found no significant difference between OC concentration in the blood between patients with "atherosclerosis" and control (p = 0.13, n = 1,197). CONCLUSION No definitive association was determined between OC and vascular calcification or atherosclerosis; however, the presence of OC-positive cells and histological staining had a consistent positive correlation with calcification or atherosclerosis. The review highlighted several themes, which may influence OC within differing populations leading to inconclusive results. Large, longitudinal studies are required to further current understanding of the clinical relevance of OC in vascular calcification and atherosclerosis.
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Affiliation(s)
- Sophie A. Millar
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
- *Correspondence: Sophie A. Millar,
| | - Hinal Patel
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
| | - Susan I. Anderson
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
| | - Timothy J. England
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
| | - Saoirse E. O’Sullivan
- Division of Medical Sciences and Graduate Entry Medicine, School of Medicine, University of Nottingham, Royal Derby Hospital, Derby, United Kingdom
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19
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El-Kamshoushi AAM, Hassan EM, Hassaan PS. Evaluation of serum level of Osteocalcin hormone in male infertility. Andrologia 2016; 49. [DOI: 10.1111/and.12755] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2016] [Indexed: 01/20/2023] Open
Affiliation(s)
- A. A. M. El-Kamshoushi
- Department of Dermatology; Venereology and Andrology; Faculty of Medicine; Alexandria University; Alexandria Egypt
| | - E. M. Hassan
- Department of Dermatology; Venereology and Andrology; Faculty of Medicine; Alexandria University; Alexandria Egypt
| | - P. S. Hassaan
- Department of Medical Physiology; Faculty of Medicine; Alexandria University; Alexandria Egypt
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20
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Li J, Zhang H, Yang C, Li Y, Dai Z. An overview of osteocalcin progress. J Bone Miner Metab 2016; 34:367-79. [PMID: 26747614 DOI: 10.1007/s00774-015-0734-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 12/22/2015] [Indexed: 12/20/2022]
Abstract
An increasing amount of data indicate that osteocalcin is an endocrine hormone which regulates energy metabolism, male fertility and brain development. However, the detailed functions and mechanism of osteocalcin are not well understood and conflicting results have been obtained from researchers worldwide. In the present review, we summarize the progress of osteocalcin studies over the past 40 years, focusing on the structure of carboxylated and undercarboxylated osteocalcin, new functions and putative receptors, the role of osteocalcin in bone remodeling, specific expression and regulation in osteoblasts, and new indices for clinical studies. The complexity of osteocalcin in completely, uncompletely and non-carboxylated forms may account for the discrepancies in its tertiary structure and clinical results. Moreover, the extensive expression of osteocalcin and its putative receptor GPRC6A imply that there are new physiological functions and mechanisms of action of osteocalcin to be explored. New discoveries related to osteocalcin function will assist its potential clinical application and physiological theory, but comprehensive investigations are required.
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Affiliation(s)
- Jinqiao Li
- China Astronaut Research and Training Center, State Key Lab of Space Medicine Fundamentals and Application, P.O.Box 1053-23#, No. 26, Beijing Road, Haidian District, Beijing, 100094, China
| | - Hongyu Zhang
- China Astronaut Research and Training Center, State Key Lab of Space Medicine Fundamentals and Application, P.O.Box 1053-23#, No. 26, Beijing Road, Haidian District, Beijing, 100094, China
| | - Chao Yang
- China Astronaut Research and Training Center, State Key Lab of Space Medicine Fundamentals and Application, P.O.Box 1053-23#, No. 26, Beijing Road, Haidian District, Beijing, 100094, China
| | - Yinghui Li
- China Astronaut Research and Training Center, State Key Lab of Space Medicine Fundamentals and Application, P.O.Box 1053-23#, No. 26, Beijing Road, Haidian District, Beijing, 100094, China
| | - Zhongquan Dai
- China Astronaut Research and Training Center, State Key Lab of Space Medicine Fundamentals and Application, P.O.Box 1053-23#, No. 26, Beijing Road, Haidian District, Beijing, 100094, China.
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21
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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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22
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Ling Y, Gao X, Lin H, Ma H, Pan B, Gao J. A common polymorphism rs1800247 in osteocalcin gene was associated with serum osteocalcin levels, bone mineral density, and fracture: the Shanghai Changfeng Study. Osteoporos Int 2016; 27:769-79. [PMID: 26194493 DOI: 10.1007/s00198-015-3244-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 07/08/2015] [Indexed: 11/25/2022]
Abstract
UNLABELLED We evaluated the relationship between a common polymorphism rs1800247 in osteocalcin gene and serum osteocalcin levels, bone mineral density and fracture in Chinese. This was a population-based cross-sectional study. We demonstrated that rs1800247 was associated with bone mineral density and fracture in men and serum osteocalcin levels in women. INTRODUCTION This study aimed to evaluate the relationship between a common polymorphism rs1800247 in osteocalcin gene and serum total osteocalcin levels, bone mineral density (BMD) and fracture in Chinese middle-aged and elderly men and women. METHODS This was a population-based cross-sectional study included 5561 individuals aged 45 years or older. Information on fractures sustained after age of 45 were collected. BMD at the lumbar spine, femoral neck and total hip were measured using dual-energy X-ray absorptiometry. The genotyping of rs1800247 was performed by matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy. RESULTS rs1800247 was associated with lumbar spine BMD and femoral neck BMD in the dominant model adjusted for age, body mass index (BMI), serum total osteocalcin in men (both P = 0.04). Besides, rs1800247 was associated with fracture adjusted for age, BMI, serum total osteocalcin and total hip BMD in the additive and dominant models in men (P = 0.04 and 0.01). In the dominant model, the carriers of CC and TC genotypes was associated with a lower odds of fracture compared with the carriers of TT genotype (OR = 0.60, 95%CI 0.40-0.88, P = 0.01). In men, rs1800247 was not associated with serum total osteocalcin levels in additive, dominant or recessive models. However, rs1800247 was associated with serum total osteocalcin levels in all models adjusted for age, BMI, menopausal status and total hip BMD in women (all p < 0.001), with osteocalcin levels decreasing across TT, TC and CC genotypes. rs1800247 was not associated with BMD or fracture in all models in women. CONCLUSIONS A common polymorphism rs1800247 in osteocalcin gene may affect the risk of osteoporosis and fracture and serum total osteocalcin levels in Chinese, and there may be gender differences underlying these associations.
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Affiliation(s)
- Y Ling
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, 200032, Shanghai, China
| | - X Gao
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, 200032, Shanghai, China.
| | - H Lin
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, 200032, Shanghai, China
| | - H Ma
- Department of Geriatrics, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, 200032, Shanghai, China
| | - B Pan
- Department of Laboratory Medicine, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, 200032, Shanghai, China
| | - J Gao
- Department of Clinical Nutrition, Zhongshan Hospital, Fudan University, No. 180 Fenglin Road, 200032, Shanghai, China
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Zoch ML, Clemens TL, Riddle RC. New insights into the biology of osteocalcin. Bone 2016; 82:42-9. [PMID: 26055108 PMCID: PMC4670816 DOI: 10.1016/j.bone.2015.05.046] [Citation(s) in RCA: 349] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Revised: 05/01/2015] [Accepted: 05/13/2015] [Indexed: 12/19/2022]
Abstract
Osteocalcin is among the most abundant proteins in bone and is produced exclusively by osteoblasts. Initially believed to be an inhibitor of bone mineralization, recent studies suggest a broader role for osteocalcin that extends to the regulation of whole body metabolism, reproduction, and cognition. Circulating undercarboxylated osteocalcin, which is regulated by insulin, acts in a feed-forward loop to increase β-cell proliferation as well as insulin production and secretion, while skeletal muscle and adipose tissue respond to osteocalcin by increasing their sensitivity to insulin. Osteocalcin also acts in the brain to increase neurotransmitter production and in the testes to stimulate testosterone production. At least one putative receptor for osteocalcin, Gprc6a, is expressed by adipose, skeletal muscle, and the Leydig cells of the testes and appears to mediate osteocalcin's effects in these tissues. In this review, we summarize these new discoveries, which suggest that the ability of osteocalcin to function both locally in bone and as a hormone depends on a novel post-translational mechanism that alters osteocalcin's affinity for the bone matrix and bioavailability. This article is part of a Special Issue entitled Bone and diabetes.
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Affiliation(s)
- Meredith L Zoch
- Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Thomas L Clemens
- Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Baltimore Veterans Administration Medical Center, Baltimore, MD, USA
| | - Ryan C Riddle
- Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Baltimore Veterans Administration Medical Center, Baltimore, MD, USA.
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Wei J, Flaherty S, Karsenty G. Searching for additional endocrine functions of the skeleton: genetic approaches and implications for therapeutics. Expert Rev Endocrinol Metab 2015; 10:413-424. [PMID: 27588033 PMCID: PMC5004930 DOI: 10.1586/17446651.2015.1058152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Our knowledge of whole organism physiology has greatly advanced in the past decades through mouse genetics. In particular, genetic studies have revealed that most organs interact with one another through hormones in order to maintain normal physiological functions and the homeostasis of the entire organism. Remarkably, through these studies many unexpected novel endocrine means to regulate physiological functions have been uncovered. The skeletal system is one example. In this article, we review a series of studies that over the years have identified bone as an endocrine organ. The mechanism of action, pathological relevance, and therapeutic implications of the functions of the bone-derived hormone osteocalcin are discussed. In the last part of this review we discuss the possibility that additional endocrine functions of the skeleton may exist.
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Affiliation(s)
- Jianwen Wei
- Department of Genetics & Development, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Stephen Flaherty
- Department of Genetics & Development, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Gerard Karsenty
- Department of Genetics & Development, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
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25
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Limonard EJ, van Schoor NM, de Jongh RT, Lips P, Fliers E, Bisschop PH. Osteocalcin and the pituitary-gonadal axis in older men: a population-based study. Clin Endocrinol (Oxf) 2015; 82:753-9. [PMID: 25376262 DOI: 10.1111/cen.12660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 10/16/2014] [Accepted: 11/02/2014] [Indexed: 12/25/2022]
Abstract
OBJECTIVE Osteocalcin is a well-known marker of bone formation. Recently, mice lacking osteocalcin or its receptor were reported to be subfertile with low testosterone and high luteinizing hormone concentrations. In parallel, in humans, a loss-of-function mutation of the osteocalcin receptor was associated with hypergonadotropic hypogonadism. This suggests that osteocalcin is necessary for normal pituitary-gonadal axis function. Our objective was to determine the association between physiological variations in osteocalcin and the pituitary-gonadal axis in older men. DESIGN AND PATIENTS Data were used from the Longitudinal Aging Study Amsterdam (LASA), an ongoing cohort study in a representative sample of the older Dutch population (65-88 years). MEASUREMENTS Serum levels of total (T), free (FT) and bioavailable (bioT) testosterone, luteinizing hormone (LH) and osteocalcin were determined. Data were analysed using linear regression analyses and adjusted for age, BMI, 25-hydroxyvitamin D, parathyroid hormone and vitamin K antagonist use. RESULTS A total of 614 men participated in the study. The median age was 75·4 (69·8-81·2) years, and the median osteocalcin level was 1·8 (1·3-2·4) nmol/l. Serum osteocalcin was inversely associated with FT (adjusted B = -0·22 ± 0·09 ng/dl, P = 0·012) and bioT (adjusted B = -0·26 ± 0·08 nmol/l, P < 0·01), but not with total T. Furthermore, osteocalcin was positively associated with LH (adjusted B = 0·09 ± 0·03 U/l, P < 0·01). CONCLUSIONS Serum osteocalcin was negatively associated with free and bioavailable testosterone and positively with luteinizing hormone levels.
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Affiliation(s)
- E J Limonard
- Department of Endocrinology and Metabolism, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Abstract
Recent developments in endocrinology, made possible by the combination of mouse genetics, integrative physiology and clinical observations have resulted in rapid and unanticipated advances in the field of skeletal biology. Indeed, the skeleton, classically viewed as a structural scaffold necessary for mobility, and regulator of calcium-phosphorus homoeostasis and maintenance of the haematopoietic niche has now been identified as an important regulator of male fertility and whole-body glucose metabolism, in addition to the classical insulin target tissues. These seminal findings confirm bone to be a true endocrine organ. This review is intended to detail the key events commencing from the elucidation of osteocalcin (OC) in bone metabolism to identification of new and emerging candidates that may regulate energy metabolism independently of OC.
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Affiliation(s)
- K J Oldknow
- Developmental BiologyThe Roslin Institute, Edinburgh, UK
| | - V E MacRae
- Developmental BiologyThe Roslin Institute, Edinburgh, UK
| | - C Farquharson
- Developmental BiologyThe Roslin Institute, Edinburgh, UK
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27
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Chamouni A, Oury F. Reciprocal interaction between bone and gonads. Arch Biochem Biophys 2014; 561:147-53. [DOI: 10.1016/j.abb.2014.06.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/14/2014] [Accepted: 06/17/2014] [Indexed: 11/30/2022]
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Prévost G, Eas F, Kuhn JM. [Plasma testosterone, obesity, metabolic syndrome and diabetes]. Presse Med 2013; 43:186-95. [PMID: 24268958 DOI: 10.1016/j.lpm.2013.04.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/12/2013] [Accepted: 04/29/2013] [Indexed: 12/31/2022] Open
Abstract
The frequency of diabetes and/or metabolic syndrome rises concurrently with that of body mass index (BMI). In adult men, plasma testosterone level changes evolve inversely to that of BMI. Plasma total testosterone, sex hormone-binding globulin (SHBG) and free testosterone are significantly lower in adult men with a clinical and biological pattern of metabolic syndrome (MetS) than in those without such a pattern. After adjustment for confounding factors, diabetes type 2 (DT2) remains associated with a significant decrease of plasma testosterone level. The androgenic blockade, used as a treatment for disseminated prostate cancer, induces a metabolic pattern similar to MetS. In men older than 65 years, a decrease of plasma testosterone level is associated with an increased risk of stroke or of death linked to a cardiovascular event. After exclusion of contraindications, the substitution with androgens of a demonstrated hypogonadism in a obese patient, notably when obesity is associated with a pattern of MetS and/or a DT2, could have some metabolic and cardiovascular advantages.
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Affiliation(s)
- Gaëtan Prévost
- CHU de Rouen, hôpital Bois-Guillaume, service d'endocrinologie, diabète et maladies métaboliques, 76230 Bois-Guillaume, France.
| | - Florence Eas
- CHU de Rouen, hôpital Bois-Guillaume, service d'endocrinologie, diabète et maladies métaboliques, 76230 Bois-Guillaume, France
| | - Jean-Marc Kuhn
- CHU de Rouen, hôpital Bois-Guillaume, service d'endocrinologie, diabète et maladies métaboliques, 76230 Bois-Guillaume, France
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29
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Buday B, Pach FP, Literati-Nagy B, Vitai M, Vecsei Z, Koranyi L. Serum osteocalcin is associated with improved metabolic state via adiponectin in females versus testosterone in males. Gender specific nature of the bone-energy homeostasis axis. Bone 2013; 57:98-104. [PMID: 23886839 DOI: 10.1016/j.bone.2013.07.018] [Citation(s) in RCA: 36] [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: 02/03/2013] [Revised: 05/23/2013] [Accepted: 07/10/2013] [Indexed: 01/28/2023]
Abstract
OBJECTIVE The osteoblast-derived protein osteocalcin (OCN) is known to be involved in glucose metabolism by increasing adiponectin secretion from adipocytes. Recently, OCN was also found to enhance testosterone production in mouse testes, suggesting that OCN effects on energy metabolism may be mediated through testosterone. Our aim was to assess a possible gender difference in the metabolic effect of OCN in humans. METHODS We included 135 women and 155 men exhibiting changes in glucose tolerance in our study. Oral and intravenous glucose tolerance tests (OGTT and IVGTT, respectively) and a hyperinsulinemic normoglycemic clamp were performed. For clamp indices, whole body (M1) and muscle (M2) glucose uptake values were used. Leptin, adiponectin serum lipid, lipoprotein, total serum OCN and testosterone levels, and body composition were determined. RESULTS Higher OCN values were associated with improving metabolic state in both genders. Adiponectin and OCN correlated significantly only in females (r=+0.254, p=0.0029), while in men, testosterone and OCN values showed a significant positive correlation (r=+0.243, p=0.0023), independent of age, BMI, HbA1c and body composition. In women, adiponectin was confirmed by feature selection analysis as being an independent determinant of OCN, in addition to age and three of the IVGTT glucose values. In men, besides M1, BMI, M2, leptin, body fat percent, and the 90-minute OGTT glucose reading testosterone, but not adiponectin were identified as independent contributors for OCN. CONCLUSION We confirmed the 'classic' adiponectin-mediated insulin-sensitising effect of OCN only in females. In men, a testosterone-mediated OCN metabolic effect is more likely.
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Affiliation(s)
- Barbara Buday
- Department of Metabolism, Drug Research Centre, Balatonfüred, Hungary.
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30
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Conti F, Wolosinska DT, Pugliese G. Diabetes and bone fragility: a dangerous liaison. Aging Clin Exp Res 2013; 25 Suppl 1:S39-41. [PMID: 23907773 DOI: 10.1007/s40520-013-0084-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 07/02/2013] [Indexed: 11/26/2022]
Abstract
Patients with diabetes are at greater risk of fractures not only for bone mineral density (BMD) decrease, showed for type 1 diabetes mellitus (T1DM), but also for bone tissue alterations that reduce bone quality and strength; thus, BMD values do not reflect bone fragility in diabetics. Higher rates of fracture in diabetic patients can be related both to changes in bone quality and in long standing diabetes to microvascular complications that lead to a greater risk of falling. Diabetes leads to impaired bone formation through many mechanisms: insulin deficiency and hyperglycemia, prevalently by AGE/RAGE axis alteration, insulin growth factors reduction, and alterations in osteocalcin and/or Wnt signaling pathways. Therefore, an adequate glycemic control is mandatory in diabetes to preserve bone health. Metformin, incretins, and DPP-4 inhibitors have a potentially positive effect on bone status, while close attention should be paid to a long-term therapy with thiazolidinediones, because they are associated to an increased risk of fracture.
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Affiliation(s)
- F Conti
- Department of Molecular Medicine, University "Sapienza", Rome, Italy,
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31
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Strapazzon G, Garolla A, Carraro U, Foresta C. Osteocalcin and its association with testosterone in patients with metabolic diseases. Osteoporos Int 2013; 24:2539-40. [PMID: 23052935 DOI: 10.1007/s00198-012-2150-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Accepted: 07/31/2012] [Indexed: 10/27/2022]
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32
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Montagnani A, Gonnelli S. Antidiabetic therapy effects on bone metabolism and fracture risk. Diabetes Obes Metab 2013; 15:784-91. [PMID: 23368527 DOI: 10.1111/dom.12077] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Revised: 09/25/2012] [Accepted: 01/21/2013] [Indexed: 12/22/2022]
Abstract
Patients with diabetes are at greater risk of fractures mostly due to not only to extraskeletal factors, such as propensity to fall, but also to bone quality alteration, which reduces bone strength. In people with diabetes, insulin deficiency and hyperglycaemia seem to play a role in determining bone formation alteration by advanced glycation end product (AGE) accumulation or AGE/RAGE (receptors for AGE) axis imbalance, which directly influence osteoblast activity. Moreover, hyperglycaemia and oxidative stress are able to negatively influence osteocalcin production and the Wnt signalling pathways with an imbalance of osteoblast/osteoclast activity leading to bone quality reduction as global effect. In addition, other factors such as insulin growth factors and peroxisome proliferator-activated receptor-γ pathways seem to have an important role in the pathophysiology of osteoporosis in diabetes. Although there are conflicting data in literature, adequate glycaemic control with hypoglycaemic treatment may be an important element in preventing bone tissue alterations in both type 1 and type 2 diabetes. Attention should be paid to the use of thiazolidinediones, especially in older women, because the direct negative effect on bone could exceed the positive effect of glycaemic control. Finally, preliminary data on animals and in humans suggest the hypothesis that incretins and dipeptidyl peptidase-4 inhibitors could have a positive effect on bone metabolism by a direct effect on bone cells; however, such issue needs further investigations.
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Affiliation(s)
- A Montagnani
- Metabolic Bone Diseases and Osteoporosis Ambulatory, Internal Medicine Unit, Misericordia Hospital, Grosseto, Italy.
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33
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Liao M, Guo X, Yu X, Pang G, Zhang S, Li J, Tan A, Gao Y, Yang X, Zhang H, Qin X, Mo L, Lu Z, Wu C, Mo Z. Role of metabolic factors in the association between osteocalcin and testosterone in Chinese men. J Clin Endocrinol Metab 2013; 98:3463-9. [PMID: 23824426 DOI: 10.1210/jc.2013-1805] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Osteocalcin can regulate energy metabolism and increase testosterone production. Although previous studies have shown the positive association between osteocalcin and testosterone, the effect of metabolic factors in the association is unclear. DESIGN AND SETTING Osteocalcin, testosterone, and metabolic factors were accessed in 2400 men aged 20 to 69 years, who participated in the population-based Fangchenggang Area Male Health and Examination Survey in Guangxi province of China from September 2009 to December 2009. MAIN OUTCOME MEASURES Metabolic syndrome was defined based on the updated report of National Cholesterol Education Program Adult Treatment Panel III criteria. Serum total osteocalcin, total testosterone (TT), and sex hormone binding globulin (SHBG) were measured, whereas free testosterone (FT) and bioavailable testosterone (BT) were calculated based on Vermeulen's formula. The multivariable linear regression analysis was used. RESULTS Osteocalcin was positively associated with TT, FT, and BT in the unadjusted model (all P < .001). After adjusting for age, the positive association between osteocalcin and TT remained statistically significant (β = .17, 95% confidence interval = 0.14-0.20) and was not attenuated in each MetS subgroup including hypertriglyceridemia, hyperglycemia, elevated blood pressure, and low high-density lipoprotein cholesterol, while in the group of central obesity (waist circumstance ≥90 cm), the association appeared significantly stronger (β = 0.21, 95% confidence interval = 0.12-0.30). After further adjusting for SHBG, osteocalcin was positively associated with TT, FT, and BT in men with central obesity or men with any two MetS components (all P < .05). CONCLUSIONS Serum total osteocalcin is positively associated with testosterone, which is probably modified by SHBG and central obesity.
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Affiliation(s)
- Ming Liao
- Institute of Urology and Nephrology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, 530021, People's Republic of China
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Bolland MJ, Grey A, Horne AM, Reid IR. Testosterone levels following decreases in serum osteocalcin. Calcif Tissue Int 2013; 93:133-6. [PMID: 23604689 DOI: 10.1007/s00223-013-9730-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 03/27/2013] [Indexed: 11/28/2022]
Abstract
Recent preclinical studies suggest that osteoblasts are able to induce testosterone production by the testis, a process mediated by osteocalcin. Bisphosphonates substantially reduce osteocalcin levels. If osteocalcin is an important regulator of testosterone levels in adult men, it would be expected that the substantial reductions in osteocalcin induced by zoledronate would impact negatively on testosterone levels. Previously, we carried out a 2-year randomized, controlled trial of annual 4 mg zoledronate in 43 HIV-infected men. To explore the relationship between osteocalcin and testosterone further, we measured serum testosterone at baseline, 3 months, and 2 years; luteinizing hormone at 3 months and 2 years; and total osteocalcin at 2 years in 28 trial participants with available blood samples. At 2 years, total osteocalcin was 39 % lower in the zoledronate group than the placebo group (zoledronate mean 10.1 [SD 3.0] μg/L, placebo 16.5 [SD 4.9] μg/L, P = 0.003). Despite these substantial differences in osteocalcin levels, testosterone levels did not change over time in either group and there were no between-group differences over time, P = 0.4 (mean change at 2 years [adjusted for baseline levels] in zoledronate group -0.4 nmol/L, 95 % CI -2.5 to 1.6; placebo group 0.4 nmol/L, 95 % CI -1.6 to 2.5). Luteinizing hormone was within the normal range and did not differ between the groups at either 3 months or 2 years. Thus, the absence of a change in testosterone despite a substantial reduction in osteocalcin following zoledronate treatment argues against a biologically significant role for osteocalcin in the regulation of testosterone in adult men. This provides reassurance that men receiving potent antiresorptive drugs are not at risk of iatrogenic hypogonadism.
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Affiliation(s)
- Mark J Bolland
- Bone and Joint Research Group, Department of Medicine, University of Auckland, Private Bag 92 019, Auckland, 1142, New Zealand.
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35
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Ogawa-Furuya N, Yamaguchi T, Yamamoto M, Kanazawa I, Sugimoto T. Serum osteocalcin levels are inversely associated with abdominal aortic calcification in men with type 2 diabetes mellitus. Osteoporos Int 2013; 24:2223-30. [PMID: 23563931 DOI: 10.1007/s00198-013-2289-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 01/07/2013] [Indexed: 10/27/2022]
Abstract
UNLABELLED We found that serum osteocalcin (OC) and undercarboxylated OC (ucOC) levels were negatively associated with abdominal aortic calcification in type 2 diabetes mellitus (T2DM) men. This finding suggests that circulating OC and ucOC are not only related to glucose or fat metabolism but also to arteriosclerosis. INTRODUCTION Recent studies revealed that serum osteocalcin levels were associated with not only bone metabolism but also glucose and fat metabolism. However, the relationship between serum OC levels and arteriosclerosis remains controversial. We examined whether or not bone metabolic markers including OC are associated with abdominal aortic calcification in patients with type 2 diabetes mellitus. METHODS We recruited 118 men and 100 postmenopausal women with T2DM. We evaluated the abdominal aortic calcification score (ACS) on a lateral lumbar radiograph and examined the association between serum OC or undercarboxylated OC levels and ACS. RESULTS The ACS of 3 and greater, which corresponded well to the highest quartile, was significantly and negatively associated with serum OC and ucOC levels in men by logistic regression analyses after adjusting for age, BMI, serum levels of creatinine and LDL cholesterol, radial bone mineral density, smoking, duration of DM, hemoglobin A1c, and the index of insulin resistance [odds ratio (OR) 0.36, 95 % confidence interval (CI) 0.19-0.70, P < 0.005, and OR 0.28, 95 % CI 0.12-0.69, P < 0.01, per standard deviation increase in OC and ucOC, respectively]. These observations were still significant after an additional adjustment for other bone markers. In contrast, there were no significant relationships with serum OC or ucOC levels and ACS in women. CONCLUSIONS These findings suggest that serum OC and ucOC levels are associated with not only bone metabolism but also arteriosclerosis in men, but not in women with type 2 diabetes mellitus.
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Affiliation(s)
- N Ogawa-Furuya
- Department of Internal Medicine 1, Shimane University Faculty of Medicine, 89-1 Enya-cho, Izumo, Shimane 693-8501, Japan.
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Schwetz V, Gumpold R, Graupp M, Hacker N, Schweighofer N, Trummer O, Pieber TR, Ballon M, Lerchbaum E, Obermayer-Pietsch B. Osteocalcin is not a strong determinant of serum testosterone and sperm count in men from infertile couples. Andrology 2013; 1:590-4. [DOI: 10.1111/j.2047-2927.2013.00095.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 04/10/2013] [Accepted: 04/16/2013] [Indexed: 12/14/2022]
Affiliation(s)
- V. Schwetz
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - R. Gumpold
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - M. Graupp
- Department of Otorhinolaryngology; Medical University of Graz; Graz; Austria
| | - N. Hacker
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - N. Schweighofer
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - O. Trummer
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - T. R. Pieber
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - M. Ballon
- Department of Obstetrics and Gynecology; Medical University of Graz; Graz; Austria
| | - E. Lerchbaum
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
| | - B. Obermayer-Pietsch
- Division of Endocrinology and Metabolism; Department of Internal Medicine; Medical University of Graz; Graz; Austria
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Patti A, Gennari L, Merlotti D, Dotta F, Nuti R. Endocrine actions of osteocalcin. Int J Endocrinol 2013; 2013:846480. [PMID: 23737779 PMCID: PMC3657394 DOI: 10.1155/2013/846480] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 04/01/2013] [Accepted: 04/02/2013] [Indexed: 12/22/2022] Open
Abstract
Osteocalcin is the most abundant noncollagenous protein of bone matrix. Once transcribed, this protein undergoes posttranslational modifications within osteoblastic cells before its secretion, including the carboxylation of three glutamic residues in glutamic acid, which is essential for hydroxyapatite binding and deposition in the extracellular matrix of bone. Recent provocative data from experimental observations in mice showed that the circulating undercarboxylated fraction of osteocalcin increases insulin secretion and sensitivity, lowers blood glucose, and decreases visceral fat in both genders, while it enhances testosterone production by the testes in males. Moreover, both total and undercarboxylated osteocalcins increase following physical activity with potential positive effects on glucose tolerance. Despite that these evidences have been only in part confirmed in humans, further prospective investigations are needed to definitively establish the endocrine role of osteocalcin both in the general population and cohorts of patients with diabetes or other metabolic disorders.
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Affiliation(s)
- Aurora Patti
- Department of Clinical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy
- *Aurora Patti:
| | - Luigi Gennari
- Department of Clinical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy
| | - Daniela Merlotti
- Department of Clinical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy
| | - Francesco Dotta
- Department of Clinical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy
| | - Ranuccio Nuti
- Department of Clinical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy
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