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Osteocalcin

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https://www.readbyqxmd.com/read/29050649/obesity-status-influences-the-relationship-among-serum-osteocalcin-iron-stores-and-insulin-sensitivity
#1
Gemma Xifra, José María Moreno-Navarrete, María Moreno, Wifredo Ricart, José Manuel Fernández-Real
BACKGROUND & AIMS: Increased iron stores significantly influence the clinical course of several chronic metabolic diseases. Recent studies have shown that iron overload decreases osteocalcin. We aimed to explore the relationship among osteocalcin, iron stores and insulin sensitivity. METHODS: Extensive clinical and laboratory measurements, including serum ferritin, cross-linked C-telopeptide of type I collagen (CTX) and osteocalcin (OC) concentrations, were analyzed in 250 adult consecutive Caucasian men...
October 6, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29044703/a-comparative-study-on-the-effect-of-promoting-the-osteogenic-function-of-osteoblasts-using-isoflavones-from-radix-astragalus
#2
Xianghe Kong, Fang Wang, Yinbo Niu, Xianglong Wu, Yalei Pan
Radix Astragalus has been shown to exert beneficial effects regarding the prevention postmenopausal osteoporosis. However, its mechanism of action remains to be investigated. Calycosin, formononetin, and calycosin-7-O-β-d-glucoside are the main isoflavone constituents of Astragalus. In this study, the abilities of these 3 compounds to promote osteogenic function of osteoblasts were compared, and the structure-activity relationships of these osteotrophic isoflavones were determined. Calycosin exhibited a greater effect than formononetin and calycosin-7-O-β-d-glucoside regarding improvements in osteogenic function of osteoblasts, as demonstrated by cell proliferation, alkaline phosphatase activity, collagen I and osteocalcin secretion, and the number and area of mineralized bone nodules...
October 18, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29044594/osteocalcin-and-osteopontin-influence-bone-morphology-and-mechanical-properties
#3
Stacyann Bailey, Gerard Karsenty, Caren Gundberg, Deepak Vashishth
Osteocalcin (OC) and osteopontin (OPN) are major non-collagenous proteins (NCPs) involved in bone matrix organization and deposition. In spite of this, it is currently unknown whether OC and OPN alter bone morphology and consequently affect bone fracture resistance. The goal of this study is to establish the role of OC and OPN in the determination of cortical bone size, shape, and mechanical properties. Our results show that Oc(-/-) and Opn(-/-) mice were no different from each other or wild type (WT) with respect to bone morphology (P > 0...
October 16, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29044575/investigation-of-the-effect-of-astaxanthin-on-alveolar-bone-loss-in-experimental-periodontitis
#4
H Balci Yuce, A Lektemur Alpan, F Gevrek, H Toker
BACKGROUND AND OBJECTIVE: Astaxanthin is a keto-carotenoid that has a strong antioxidant effect. The purpose of this study was to evaluate the effects of astaxanthin on alveolar bone loss and histopathological changes in ligature-induced periodontitis in rats. MATERIAL AND METHODS: Wistar rats were divided into four experimental groups: non-ligated (C, n = 6); ligature only (L, n = 6); ligature and astaxanthin (1 mg/kg/day astaxanthin, AS1 group, n = 8); ligature and astaxanthin (5 mg/kg/day astaxanthin, AS5 group, n = 8)...
October 17, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29044527/effect-of-the-combined-use-of-enamel-matrix-derivative-and-atelocollagen-sponge-scaffold-on-osteoblastic-differentiation-of-mouse-induced-pluripotent-stem-cells-in-vitro
#5
Y Hisanaga, E Suzuki, H Aoki, M Sato, A Saito, A Saito, T Azuma
BACKGROUND AND OBJECTIVE: Induced pluripotent stem cells (iPSCs) are a candidate cell source in periodontal regenerative therapy. Enamel matrix derivative (EMD) has been shown to regenerate periodontal tissues, and atelocollagen sponge (ACS) is considered a suitable scaffold or carrier for growth factors. This study aimed to investigate the effect of combined use of EMD and an ACS scaffold on cell behaviors and differentiation of mouse iPSCs (miPSCs) in vitro. MATERIAL AND METHODS: Following embryonic body formation from miPSCs, dissociated cells (miPS-EB-derived cells) were seeded onto ACS with or without EMD, and cultured in osteoblast differentiation medium...
October 17, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/29042442/1%C3%AE-25-dihydroxyvitamin-d3-promotes-bone-formation-by-promoting-nuclear-exclusion-of-the-foxo1-transcription-factor-in-diabetic-mice
#6
Yi Xiong, Yixin Zhang, Na Xin, Ying Yuan, Qin Zhang, Ping Gong, Yingying Wu
1α,25-Dihydroxyvitamin D3 (1,25(OH)2D3) is the active form of vitamin D, which is responsible for reducing the risk for diabetes mellitus (DM), decreasing insulin resistance, and improving insulin secretion. Previous studies have shown that 1,25(OH)2D3 inhibited the activity of FoxO1, which has been implicated in the regulation of glucose metabolism. However, its function and mechanism of action in DM-induced energy disorders and also in bone development remains unclear. Here, using in vitro and in vivo approaches including osteoblast-specific, conditional FoxO1-knockout mice, we demonstrate that 1,25(OH)2D3 ameliorates abnormal osteoblast proliferation in DM-induced oxidative stress conditions, and rescues the impaired glucose and bone metabolism through FoxO1 nuclear exclusion resulted from the activation of PI3K/Akt signaling...
October 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29039565/hydrogen-sulfide-regulates-bone-remodeling-and-promotes-orthodontic-tooth-movement
#7
Haiya Pu, Yongmei Hua
Hydrogen sulfide (H2S) is a gas signaling molecule that has multiple influences on physiological and pathological processes in the mammalian body, including vasodilation, neurotransmission, inflammation, hypoxia sensing and bone remodeling. Our previous studies suggested that H2S might be involved in the periodontal tissue remodeling during the orthodontic tooth movement (OTM) via increasing periodontal ligament cell differentiation, tissue mineralization, bone formation and collagen synthesis. The aim of the present study was to investigate the effects of H2S on alveolar bone remodeling that is associated with tooth movement...
October 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29039481/administration-of-erythropoietin-prevents-bone-loss-in-osteonecrosis-of-the-femoral-head-in-mice
#8
Taotao Xu, Hongting Jin, Yangjun Lao, Pinger Wang, Shanxing Zhang, Hongfeng Ruan, Qiang Mao, Li Zhou, Luwei Xiao, Peijian Tong, Chengliang Wu
Long‑term administration of glucocorticoid hormones is considered one of predominant pathological factors inducing osteonecrosis of the femoral head (ONFH) development and progression, in which reduction of blood supply leads to a progressive bone loss and impairment of bone structure in the majority of cases. In a non‑hematopoietic system, erythropoietin (EPO) can stimulate angiogenesis and bone regeneration. However, the specific mechanism underlying the role of EPO in ONFH remains to be elucidated. Therefore, the purpose of this study was to determine the effect of EPO on the prevention of bone loss in ONFH...
October 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29038837/reduced-kidney-function-is-associated-with-bmd-bone-loss-and-markers-of-mineral-homeostasis-in-older-women-a-10-year-longitudinal-study
#9
L Malmgren, F McGuigan, A Christensson, K E Akesson
Kidney function decreases with age; however, the long-term influence on bone density (BMD) in older women already at risk of osteoporosis is unknown. We followed kidney function and bone loss for 10 years. Declining kidney function was adversely associated with bone loss and mineral homeostasis in old women, though it attenuated with advanced aging. INTRODUCTION: Existing studies do not fully address the relationship between kidney function and bone metabolism with advanced aging in Caucasian women...
October 16, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/29037671/blue-mussel-mytilus-edulis-protein-hydrolysate-promotes-mouse-mesenchymal-stem-cell-differentiation-into-osteoblasts-through-up-regulation-of-bone-morphogenetic-protein
#10
Jun-Ho Hyung, Chang-Bum Ahn, Jae-Young Je
Seafood provides a range of health benefits due to its high-protein level. In this study, the osteogenic effect of blue mussel (Mytilus edulis) protein hydrolysates (BMPH) on osteoblast differentiation were examined using mouse mesenchymal stem cells (MSCs). A preparation we called BMPH<1kDa which showed the highest osteogenic effect in MSCs, was prepared by peptic hydrolysis. BMPH<1kDa treatment stimulated osteoblast differentiation with alkaline phosphatase (ALP) induction, osteocalcin and type I collagen activity as well as calcium deposition...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29036760/the-effects-of-downhill-and-uphill-exercise-training-on-osteogenesis-related-factors-in-ovariectomy-induced-bone-loss
#11
Yun-Seok Kang, Chun-Ho Kim, Jeong-Seok Kim
PURPOSE: Recent evidence suggests that regular exercise training plays a decisive role in maintaining homeostasis and promoting muscle and skeletal formation. However, the effect of downhill exercise training on osteogenesis-related factors is not well understood. METHODS: Thus, we investigated the effect of uphill and downhill training on ovariectomy (OVX)-induced bone loss. After ovary removal, the exercise method performed included uphill (16 m/min, +15°) and downhill training (16 m/min, -15°) for 60 min/day and 5 days/week, respectively, for 8 weeks...
September 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/29035884/protective-effects-of-pretreatment-with-quercetin-against-lipopolysaccharide-induced-apoptosis-and-the-inhibition-of-osteoblast-differentiation-via-the-mapk-and-wnt-%C3%AE-catenin-pathways-in-mc3t3-e1-cells
#12
Chun Guo, Rui-Juan Yang, Ke Jang, Xiao-Ling Zhou, Yu-Zhen Liu
BACKGROUND/AIMS: Quercetin, a flavonoid found in onions and other vegetables, has potential inhibitory effects on bone resorption in vivo and in vitro. In our previous study, we found that quercetin treatment reversed lipopolysaccharide (LPS)-induced inhibition of osteoblast differentiation through the mitogen-activated protein kinase (MAPK) pathway in MC3T3-E1 cells. In this study, we investigated the underlying mechanisms of pretreatment with quercetin on apoptosis and the inhibition of osteoblast differentiation in MC3T3-E1 cells induced by LPS...
October 16, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29035339/promoting-effect-of-pinostrobin-on-the-proliferation-differentiation-and-mineralization-of-murine-pre-osteoblastic-mc3t3-e1-cells
#13
Chengbo Gu, Linan Fu, Xiaohan Yuan, Zhiguo Liu
Pinostrobin (PI), a natural flavonoid found in a variety of plants, is well known for its rich pharmacological activities. However, its osteogenic function remains unclear. The aim of this study is to evaluate the effect of PI on the proliferation, differentiation, and mineralization of murine pre-osteoblastic MC3T3-E1 cells in vitro using MTT, alkaline phosphatase (ALP) activity, the synthesis of collagen I (Col I) assay, and Von-Kossa staining, respectively. The expression of osteocalcin (OCN) mRNA in cells was detected by real-time PCR...
October 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29034731/effects-of-omega-3-fatty-acids-on-bone-turnover-markers-in-postmenopausal-women-systematic-review-and-meta-analysis
#14
D Shen, X Zhang, Z Li, H Bai, L Chen
AIM: There is conflicting evidence regarding the effects of omega-3 fatty acids on bone turnover markers in postmenopausal women. Thus, we systematically reviewed the efficacy of omega-3 fatty acids by conducting a meta-analysis of available randomized controlled trials. METHODS: PubMed, Embase, Cochrane Library and Scopus were searched in December 2016. The standardized mean difference (SMD) or weighted mean difference (WMD) and the corresponding 95% confidence intervals (CIs) were calculated using a fixed-effects model...
October 16, 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/29034574/morphometric-and-histologic-characterization-of-alveolar-bone-from-hypertensive-patients
#15
André Luís da Silva Fabris, Gabriel Mulinari-Santos, Jaqueline Suemi Hassumi, Alexandre Rodrigues Freire, Leonardo Perez Faverani, Reinhard Gruber, Roberta Okamoto
BACKGROUND: Hypertension is considered a risk factor in implant dentistry but the underlying reasons remain unclear. It may be that hypertension has a negative impact on the local bone quality. PURPOSE: Here we evaluated the structural and histological parameters of bone collected from hypertensive patients treated by antagonists of the renin-angiotensin system, and of bone collected from normotensive patients. MATERIAL AND METHODS: A total of 30 patients were referred for rehabilitation with dental implants to be placed in the posterior mandible...
October 16, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29032403/mate-tea-ilex-paraguariensis-improves-bone-formation-in-the-alveolar-socket-healing-after-tooth-extraction-in-rats
#16
Matheus da Silva Brasilino, Camila Tami Stringhetta-Garcia, Camila Scacco Pereira, Ariana Aparecida Ferreira Pereira, Karina Stringhetta, Andréia Machado Leopoldino, Marcelo Macedo Crivelini, Edilson Ervolino, Rita Cássia Menegati Dornelles, Ana Cláudia de Melo Stevanato Nakamune, Antonio Hernandes Chaves-Neto
OBJECTIVES: The objective of this study was to investigate the effects of mate tea (MT) [Ilex paraguariensis] on alveolar socket healing after tooth extraction. MATERIALS AND METHODS: Sixteen male rats were divided into MT and control groups. MT was administered by intragastric gavage at a dose of 20 mg/kg/day for 28 days before and 28 days after right maxillary incisor extraction. The control group received an equal volume of water. Histopathological and histometric analysis of the neoformed bone area and osteocyte density were performed, as well as immunohistochemical analysis of osteocalcin (OCN), receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG), tartrate-resistant acid phosphatase (TRAP), and manganese superoxide dismutase (MnSOD) in the alveolar socket...
October 14, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29031226/ectopic-vascularized-bone-formation-by-human-mesenchymal-stem-cell-microtissues-in-a-biocomposite-scaffold
#17
Rajan Narayan, Tarun Agarwal, Debasish Mishra, Somnath Maji, Sujata Mohanty, Asok Mukhopadhyay, Tapas Kumar Maiti
Three-dimensional multicellular human bone marrow mesenchymal stem cells (hBM-MSCs) are showing a great promise in the repair of bone tissue due to its osteogenic differentiation potential, mimicking in vivo microenvironment and immunomodulatory property. In the present study, the potential of hBM-MSC microtissues (MTs) in combination with a biocomposite material to form vascularized bone-like tissue at an ectopic site in an immunocompromised mouse was evaluated. The scaffold was fabricated using gelatin, carboxymethyl cellulose, polyvinyl alcohol and nano-hydroxyapatite (GCnHP) by the freeze-drying method...
October 5, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29030774/effects-of-growth-hormone-therapy-on-bone-density-and-fracture-risk-in-age-related-osteoporosis-in-the-absence-of-growth-hormone-deficiency-a-systematic-review-and-meta-analysis
#18
Maya Barake, Asma Arabi, Nancy Nakhoul, Ghada El-Hajj Fuleihan, Sarah El Ghandour, Anne Klibanski, Nicholas A Tritos
PURPOSE: In adults, growth hormone deficiency (GHD) has been associated with low bone mineral density (BMD), an effect counteracted by growth hormone (GH) replacement. Whether GH is beneficial in adults with age-related bone loss and without hypopituitarism is unclear. METHODS: We conducted a systematic literature search using Medline, Embase and the Cochrane Register of Controlled Trials. We extracted and analyzed data according to the bone outcome included [bone mineral content (BMC), BMD, and bone biomarker, fracture risk]...
October 13, 2017: Endocrine
https://www.readbyqxmd.com/read/29030554/hdx-reveals-the-conformational-dynamics-of-dna-sequence-specific-vdr-co-activator-interactions
#19
Jie Zheng, Mi Ra Chang, Ryan E Stites, Yong Wang, John B Bruning, Bruce D Pascal, Scott J Novick, Ruben D Garcia-Ordonez, Keith R Stayrook, Michael J Chalmers, Jeffrey A Dodge, Patrick R Griffin
The vitamin D receptor/retinoid X receptor-α heterodimer (VDRRXRα) regulates bone mineralization via transcriptional control of osteocalcin (BGLAP) gene and is the receptor for 1α,25-dihydroxyvitamin D3 (1,25D3). However, supra-physiological levels of 1,25D3 activates the calcium-regulating gene TRPV6 leading to hypercalcemia. An approach to attenuate this adverse effect is to develop selective VDR modulators (VDRMs) that differentially activate BGLAP but not TRPV6. Here we present structural insight for the action of a VDRM compared with agonists by employing hydrogen/deuterium exchange...
October 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29029615/fenofibrate-decreases-the-bone-quality-by-down-regulating-runx2-in-high-fat-diet-induced-type-2-diabetes-mellitus-mouse-model
#20
Tianshu Shi, Ke Lu, Siyu Shen, Qiaoli Tang, Kaijia Zhang, Xiaobo Zhu, Yong Shi, Xianglin Liu, Huajian Teng, Chaojun Li, Bin Xue, Qing Jiang
BACKGROUND: This study is to investigate the effect of fenofibrate on the bone quality of Type 2 diabetes mellitus (T2DM) mouse model. METHODS: T2DM mouse model was induced by high-fat-diet, and the mice were treated with fenofibrate (100 mg/kg) (DIO-FENO) or PBS (DIO-PBS) for 4 weeks. The bone microstructure and biomechanical properties of femora were analyzed by micro-CT and 3-Point bending test. The protein expression was detected by immunohistochemical staining and Western blot...
October 13, 2017: Lipids in Health and Disease
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