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Bone mineral density

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https://www.readbyqxmd.com/read/29332162/roles-of-irisin-in-the-linkage-from-muscle-to-bone-during-mechanical-unloading-in-mice
#1
Naoyuki Kawao, Akihiro Moritake, Kohei Tatsumi, Hiroshi Kaji
Mechanical unloading induces disuse muscle atrophy and bone loss, but the details in mechanism involved in those pathophysiological conditions are not fully understood. Interaction between muscle and bone has been recently noted. Here, we investigated the roles of humoral factors linking muscle to bone during mechanical unloading using mice with hindlimb unloading (HU) and sciatic neurectomy (SNX). HU and SNX reduced muscle volume surrounding the tibia, tissue weights of soleus and gastrocnemius muscle, and trabecular bone mineral density (BMD) in the tibia of mice...
January 13, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29331301/marrow-adipose-tissue-imaging-in-humans
#2
Vibha Singhal, Miriam A Bredella
Bone strength is affected not only by bone mineral density (BMD) and bone microarchitecture but also its microenvironment. Recent studies have focused on the role of marrow adipose tissue (MAT) in the pathogenesis of bone loss. Osteoblasts and adipocytes arise from a common mesenchymal stem cell within bone marrow and many osteoporotic states, including aging, medication use, immobility, over - and undernutrition are associated with increased marrow adiposity. Advancements in imaging technology allow the non-invasive quantification of MAT...
January 10, 2018: Bone
https://www.readbyqxmd.com/read/29331300/cigarette-smoking-and-hip-volumetric-bone-mineral-density-and-cortical-volume-loss-in-older-adults-the-ages-reykjavik-study
#3
Elisa A Marques, Martine Elbejjani, Vilmundur Gudnason, Gunnar Sigurdsson, Thomas Lang, Sigurdur Sigurdsson, Thor Aspelund, Kristin Siggeirsdottir, Lenore Launer, Gudny Eiriksdottir, Tamara B Harris
This study aimed to explore the relationships of several indicators of cigarette smoking habits (smoking status, pack-years, age at smoking initiation and smoking cessation) with quantitative computed tomographic (QCT)-derived proximal femur bone measures (trabecular vBMD, integral vBMD and the ratio of cortical to total tissue volume (cvol/ivol)) and with subsequent change in these measures over the next five years. A total of 2673 older adults (55.9% women), aged 66-92 years at baseline from the Age, Gene/Environment Susceptibility (AGES)-Reykjavik Study, who had two QCT scans of the hip were studied...
January 10, 2018: Bone
https://www.readbyqxmd.com/read/29330572/effects-of-whole-body-vibration-on-muscle-strength-bone-mineral-content-and-density-and-balance-and-body-composition-of-children-and-adolescents-with-down-syndrome-a-systematic-review
#4
REVIEW
M B Saquetto, F F Pereira, R S Queiroz, C M da Silva, C S Conceição, M Gomes Neto
The aim of this study is to verify the effects of whole-body vibration (WBV) training on the muscle strength of children and adolescents with Down syndrome. We searched MEDLINE, Cochrane, SciELO, Lilacs and PUBMED databases and included manual searches to identify randomised controlled trials to investigate the effects of WBV on the structure and body function of children and adolescents with Down syndrome. Two reviewers independently selected the studies and performed statistical analysis. In total, five studies with 171 patients that compared WBV with exercise and/or control were included...
January 12, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29330445/a-novel-approach-for-correction-of-crosstalk-effects-in-pathway-analysis-and-its-application-in-osteoporosis-research
#5
Yu Zhou, Yunlong Gao, Chao Xu, Hui Shen, Qing Tian, Hong-Wen Deng
Osteoporosis is a prevalent bone metabolic disease and peripheral blood monocytes represent a major systemic cell type for bone metabolism. To identify the key dysfunctional pathways in osteoporosis, we performed pathway analyses on microarray data of monocytes from subjects with extremely high/low hip bone mineral density. We first performed a traditional pathway analysis for which different pathways were treated as independent. However, genes overlap among pathways will lead to "crosstalk" phenomenon, which may lead to false positive/negative results...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29329805/preparative-expression-and-purification-of-a-nacreous-protein-n16-and-testing-its-effect-on-osteoporosis-rat-model
#6
Zhen-Yan Xu, Yu-Ling Liu, Jia-Bi Lin, Ke-Ling Cheng, Yong-Gang Wang, Hong-Liang Yao, Wei-Peng, Hoi-Yan Wu, Wei-Wei Su, Pang-Chui Shaw, Pei-Bo Li
N16, a nacreous protein isolated from Pinctada martensii, is related to nacreous layer formation. Our previous study indicated that N16 showed dual regulatory effects by inducing osteoblast biomineralization as well as inhibiting osteoclast formation. In order to obtain large quantity of N16 for animal experiment and clinical trial, a fermentation and preparative purification method was established. The N16 cDNA was cloned to a BL21(DE3)plysE-pET32a vector and grown in a 20 L fermenter. The medium, temperature, pH and dissolved oxygen (DO) were optimized...
January 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29329765/usefulness-of-the-trabecular-bone-score-for-assessing-the-risk-of-osteoporotic-fracture
#7
L Redondo, E Puigoriol, J R Rodríguez, P Peris, E Kanterewicz
INTRODUCTION AND OBJECTIVES: The trabecular bone score (TBS) is an imaging technique that assesses the condition of the trabecular microarchitecture. Preliminary results suggest that TBS, along with the bone mineral density assessment, could improve the calculation of the osteoporotic fracture risk. The aim of this study was to analyse TBS values and their relationship with the clinical characteristics, bone mineral density and history of fractures of a cohort of posmenopausal women. MATERIAL AND METHODS: We analysed 2,257 posmenopausal women from the FRODOS cohort, which was created to determine the risk factors for osteoporotic fracture through a clinical survey and bone densitometry with vertebral morphometry...
January 9, 2018: Revista Clínica Española
https://www.readbyqxmd.com/read/29329467/low-aromatase-activity-and-estradiol-sex-hormone-binding-globulin-ratio-are-associated-with-total-hip-bone-mineral-density-and-the-presence-of-osteoporosis-a-study-in-chinese-postmenopausal-women
#8
Hai-Juan Liu, Jun Yan, Yan Li, Fang-Yuan Zhou, Xu-Dong Su, Hui-Jing Fan, Jie Bai, Guang-Zhen Zhang
Several groups have reported the important role of estradiol (E2) and testosterone (T) in postmenopausal osteoporosis (PMOP). Because aromatase catalyzes the conversion of T to E2, the purpose of this study was to determine the influence of aromatase activity on the bone mineral density (BMD) in postmenopausal women. A total of 344 postmenopausal women were selected for this study. Serum E2, T, sex hormone-binding globulin (SHBG), calcium (Ca), alkaline phosphatase (ALP), C-terminal telopeptide of type I collagen (CTX), and procollagen type I amino-terminal propeptide (PINP) were examined...
January 2018: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
https://www.readbyqxmd.com/read/29329430/increases-in-igf-1-after-anti-tnf-%C3%AE-therapy-are-associated-with-bone-and-muscle-accrual-in-pediatric-crohn-s-disease
#9
Mark D DeBoer, Arthur M Lee, Kirabo Herbert, Jin Long, Meena Thayu, Lindsay M Griffin, Robert N Baldassano, Lee A Denson, Babette S Zemel, Michelle R Denburg, Rita Herskovitz, Mary B Leonard
Context: Low levels of IGF-1 in pediatric and adolescent Crohn's Disease (CD) likely contribute to bone and muscle deficits. Objective: Assess changes in IGF-1 levels and associations with bone and muscle accrual following initiation of anti-TNF-α therapy in pediatric and adolescent CD. Design and Participants: Participants (n=75, age 5-21 years) with CD were enrolled in a prospective cohort study; 63 completed the 12-month visit. Main Outcome Measures: IGF-1 levels at baseline and 10 weeks, and DXA and tibia peripheral quantitative-CT (pQCT) measures of bone and muscle at baseline and 12 months after initiation of anti-TNF-α therapy...
January 10, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29328885/radiographic-emphysema-circulating-bone-biomarkers-and-progressive-bone-mineral-density-loss-in-smokers
#10
Jessica Bon, Yingze Zhang, Joseph K Leader, Carl Fuhrman, Subashan Perera, Divay Chandra, Marnie Bertolet, Brenda Diergaarde, Susan L Greenspan, Frank C Sciurba
RATIONALE: Osteoporosis is common in individuals with chronic obstructive pulmonary disease. Lung-specific factors, including radiographic emphysema, independently associate with low bone mineral density (BMD) in cross-sectional smoking cohorts. However, factors associated with progressive bone loss in smokers are under-studied and largely unknown. OBJECTIVES: To determine the relationship between radiographic emphysema, circulating bone metabolism markers, and pulmonary function and accelerated BMD loss in smokers...
January 12, 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29327546/-bone-mineral-density-decreased-is-a-high-risk-factor-for-uncemented-acetabular-cups-migration-in-female-total-hip-arthroplasty-patients
#11
Jia Liu, Jiang Deng, Xiao-Song Han, Lin Xu
OBJECTIVE: To investigate the decrease of bone mineral density in female patients, effects on acetabular displacement. METHODS: From October 2013 to November 2015, a total of 34 patients underwent total hip replacement in the Department of orthopedics, the Third Affiliated Hospital of Zunyi Medical College. The two groups of patients were female and the patients were treated with hip osteoarthritis. Based on the lowest value of preoperative dual energy X-ray bone mineral density (DXA), the patients were divided into normal group and low bone mineral density(-3...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29327327/identifying-potentially-common-genes-between-dyslipidemia-and-osteoporosis-using-novel-analytical-approaches
#12
Xu Lin, Cheng Peng, Jonathan Greenbaum, Zhang-Fang Li, Ke-Hao Wu, Zeng-Xin Ao, Tong Zhang, Jie Shen, Hong-Wen Deng
Dyslipidemia (DL) is closely related to osteoporosis (OP), while the exact common genetic mechanisms are still largely unknown. We proposed to use novel genetic analysis methods with pleiotropic information to identify potentially novel and/or common genes for the potential shared pathogenesis associated with OP and/or DL. We assessed the pleiotropy between plasma lipid (PL) and femoral neck bone mineral density (FNK BMD). We jointly applied the conditional false discovery rate (cFDR) method and the genetic analysis incorporating pleiotropy and annotation (GPA) method to the summary statistics provided by genome-wide association studies (GWASs) of FNK BMD (n = 49,988) and PL (n = 188,577) to identify potentially novel and/or common genes for BMD/PL...
January 11, 2018: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/29327231/loading-of-the-condylar-cartilage-can-rescue-the-effects-of-botox-on-tmj
#13
Eliane H Dutra, Mara H O'Brien, Candice Logan, Aditya Tadinada, Ravindra Nanda, Sumit Yadav
The purpose of this study is to evaluate whether the effects of botulinum neurotoxin (botox) injection into the masseter in the mandibular condylar cartilage (MCC) and subchondral bone could be rescued by compressive loading of the temporomandibular joint (TMJ). Twenty-four 6-week-old female mice (C57BL/6J) were used. Mice were divided in three groups: (1) Botox (n = 8); (2) Botox plus loading (n = 8); (3) Pure control (n = 8). Bone labels (3 and 1 day before sacrifice) and the proliferation marker EdU (2 and 1 day before sacrifice) were intraperitoneally injected into all groups of mice...
January 11, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29326134/evaluation-of-estrogenic-potential-by-herbal-formula-hpc-03-for-in-vitro-and-in-vivo
#14
Bo Yoon Chang, Dae Sung Kim, Hye Soo Kim, Sung Yeon Kim
HPC 03 is herbal formula that consists of extracts from Angelica gigas, Cnidium officinale Makino and Cinnamomum cassia Presl. The present study evaluated the estrogenic potential of HPC 03 by using in vitro and in vivo models. The regulatory mechanisms of HPC 03 in estrogen-dependent MCF-7 cells were assessed. HPC 03 induced the proliferation of estrogen receptor-positive MCF-7 cells, and the proliferation was blocked by the addition of the estrogen antagonist tamoxifen. The estrogen receptorα/β luciferase activities were significantly increased by HPC 03 treatment, which also increased the mRNA expression of the estrogen-responsive genes Psen2, Pgr and Ctsd Also, we evaluated the ameliorative effects of HPC 03 on menopausal symptoms in ovariectomized rats...
February 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29325759/snps-in-the-vicinity-of-p2x7r-rank-rankl-opg-and-wnt-signalling-pathways-and-their-association-with-bone-phenotypes-in-academy-footballers
#15
Ian Varley, David C Hughes, Julie P Greeves, William D Fraser, Craig Sale
CONTEXT: Genotype plays an important role in influencing bone phenotypes, such as bone mineral density, but the role of genotype in determining responses of bone to exercise has yet to be elucidated. OBJECTIVE: To determine whether 10 SNPs associated with genes in the vicinity of P2X7R, RANK/RANKL/OPG and Wnt Signalling Pathways are associated with bone phenotypes in elite academy footballers (Soccer players) and to determine whether these genotypes are associated with training induced changes in bone...
January 8, 2018: Bone
https://www.readbyqxmd.com/read/29325096/genetic-determinants-of-circulating-estrogen-levels-and-evidence-of-a-causal-effect-of-estradiol-on-bone-density-in-men
#16
Anna L Eriksson, John R B Perry, Andrea D Coviello, Graciela E Delgado, Luigi Ferrucci, Andrew R Hoffman, Ilpo T Huhtaniemi, M Arfan Ikram, Magnus K Karlsson, Marcus E Kleber, Gail A Laughlin, Yongmei Liu, Mattias Lorentzon, Kathryn L Lunetta, Dan Mellström, Joanne M Murabito, Anna Murray, Maria Nethander, Carrie M Nielson, Inga Prokopenko, Stephen R Pye, Leslie J Raffel, Fernando Rivadeneira, Priya Srikanth, Lisette Stolk, Alexander Teumer, Thomas G Travison, André G Uitterlinden, Dhananjay Vaidya, Dirk Vanderschueren, Joseph M Zmuda, Winfried März, Eric S Orwoll, Pamela Ouyang, Liesbeth Vandenput, Frederick C W Wu, Frank H de Jong, Shalender Bhasin, Douglas P Kiel, Claes Ohlsson
Context: Serum estradiol (E2) and estrone (E1) levels exhibit substantial heritability. No genome-wide association study (GWAS) of estrogen levels has been performed in men of European origin. Objective: To investigate the genetic regulation of serum E2 and E1 in men. Design, setting and participants: GWAS in 11,097 men of European origin from nine epidemiological cohorts. Main Outcome Measures: Genetic determinants of serum E2 and E1 levels...
January 9, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29324909/effect-of-hypoparathyroid-on-bone-mineral-density-of-lumber-spine-in-postmenopausal-women-with-differentiated-thyroid-cancinoma
#17
Yongli Bai, Yanlei Huo, Fei Yu, Danyang Wang, Chao Ma
OBJECTIVE: To investigate the effect of hypoparathyroid on bone mineral density in postmenopausal women with differentiated thyroid carcinoma (DTC). SUBJECT AND METHODS: Postmenopausal women with postoperative DTC, and undergoing thyroid residual ablation or for metastases treatment were collected and followed for two years. They were divided into hypoparathyroid group (PTH<15pg/mL) and a normal cognitive group (PTH>15pg/mL). Bone mineral density (BMD) at the lumbar spine was analyzed using dual-energy X-ray absorptiometry (DXA) at baseline, 6, 12 and 24 months...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29324908/peripheral-quantitative-computed-tomography-detects-differences-at-the-radius-in-prepubertal-children-with-cystic-fibrosis-compared-to-healthy-controls
#18
Catherine E O'Brien, Gulnur Com, John Fowlkes, Xinyu Tang, Laura P James
INTRODUCTION: In 2015, 11.9% of people with cystic fibrosis (CF) in the United States had osteopenia, 5.1% osteoporosis, and 0.3% experienced a fracture. Screening for CF-related bone disease starts in childhood, and dual energy x-ray absorptiometry (DXA) is the recommended method. It is unknown whether peripheral quantitative computed tomography (pQCT) can detect deficits earlier than DXA. This study compared pQCT and DXA scans in a group of pre-pubertal children with CF and healthy controls...
2018: PloS One
https://www.readbyqxmd.com/read/29322706/osteoporosis-in-postmenopausal-females-with-primary-knee-osteoarthritis-in-a-vitamin-d-deficient-population
#19
Pooja Dhaon, Siddharth Kumar Das, Ragini Srivastava, Akash Asthana, Girdhar Agarwal
Aim and Objective: To find prevalence of osteoporosis (OP) in postmenopausal females with primary knee osteoarthritis (OA) in India, where there is widespread Vitamin D deficiency (VDD). Material and Methods: 75 postmenopausal women (PMW) fulfilling ACR criteria for Knee OA between 40 - 60 years of age, having OA grade 2 or more as per Kellgren Lawrence grade on anterior- posterior radiograph of the right knee were enrolled. 34 PMW of the same age with normal right knee radiograph were taken as controls...
November 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29322073/high-fat-high-sucrose-diet-results-in-higher-bone-mass-in-aged-rats
#20
Akira Minematsu, Yasue Nishii, Susumu Sakata
Intake of high-fat/high-sucrose (HFS) diet or high fat diet influences bone metabolism in young rodents, but its effects on bone properties of aged rodents still remain unclear. This study aimed to examine the effects of HFS diet intake on trabecular bone architecture (TBA) and cortical bone geometry (CBG) in aged rats. Fifteen male Wistar rats over 1 year were randomly divided into two groups. One group was fed a standard laboratory diet (SLD) and the other group was fed a HFS diet for six months. The femur/tibia, obtained from both groups at the end of experimental period, were scanned by micro-computed tomography for TBA/CBG analyses...
June 2018: Bone Reports
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