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https://www.readbyqxmd.com/read/28302355/effects-of-short-term-calcium-supplementation-in-children-and-adolescents-with-phenylketonuria
#1
Nancy Y Y Tanaka, Marlene F Turcato, Carolina F Nicoletti, Carla B Nonino, Luciana D Martins, Odilon Iannetta, Carlos Guerreiro, Gisele G Santos, Júlio S Marchini
Reduction of bone mineral density and the risk of osteopenia have been reported to occur in phenylketonuria (PKU) patients. This study aimed to evaluate the short-term effects of calcium supplementation in phenylketonuric children and adolescents. The study included 18 patients with PKU aged 5-18 yr (61% male) under clinical and nutritional treatment. Evaluation of food intake, anthropometry, and biochemical and phalangeal quantitative ultrasound were performed before (phase 1) and after (phase 2) calcium supplementation (1000 mg/d) for 34 d...
March 13, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28300755/vitamin-d-impacts-the-expression-of-runx2-target-genes-and-modulates-inflammation-oxidative-stress-and-membrane-vesicle-biogenesis-gene-networks-in-143b-osteosarcoma-cells
#2
Rama Garimella, Priyanka Tadikonda, Ossama Tawfik, Sumedha Gunewardena, Peter Rowe, Peter Van Veldhuizen
Osteosarcoma (OS) is an aggressive malignancy of bone affecting children, adolescents and young adults. Understanding vitamin D metabolism and vitamin D regulated genes in OS is an important aspect of vitamin D/cancer paradigm, and in evaluating vitamin D as adjuvant therapy for human OS. Vitamin D treatment of 143B OS cells induced significant and novel changes in the expression of genes that regulate: (a) inflammation and immunity; (b) formation of reactive oxygen species, metabolism of cyclic nucleotides, sterols, vitamins and mineral (calcium), quantity of gap junctions and skeletogenesis; (c) bone mineral density; and (d) cell viability of skeletal cells, aggregation of bone cancer cells and exocytosis of secretory vesicles...
March 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28271807/2016-the-year-that-was-bone-strength
#3
Kathleen F Janz
Of all the lifestyle strategies for increasing bone strength during the growing years, physical activity is one of the most efficacious. This commentary highlights two exceptional 2016 publications addressing bone strength in children and adolescents with an eye toward reduced fracture risk later in life. The first by Weaver et al. was selected due to its comprehensive approach to understanding bone development. The second by Mitchell et al explores a new field of inquiry, that is, genetic-environment interaction as represented by bone mineral density-lowering alleles and high-impact physical activity...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28246926/romosozumab-treatment-converts-trabecular-rods-into-trabecular-plates-in-male-cynomolgus-monkeys
#4
Jonathan B Matheny, Ashley M Torres, Michael S Ominsky, Christopher J Hernandez
Treatment with sclerostin antibody (romosozumab) increases bone formation while reducing bone resorption, leading to increases in bone volume and bone mineral density. Sclerostin antibody treatment may also provide beneficial changes in trabecular microarchitecture and strength that are not reflected in bone volume and density. Here we use three-dimensional dynamic histomorphometry to determine longitudinal changes in vertebral trabecular microarchitecture in adolescent male cynomolgus monkeys (4-5 years old) treated with sclerostin antibody...
February 28, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28246621/prevalence-of-fracture-in-healthy-iranian-children-aged-9-18-years-and-associated-risk-factors-a-population-based-study
#5
Marjan Jeddi, Mohammad Hossein Dabbaghmanesh, Alireza Kharmandar, Gholamhossein Ranjbar Omrani, Marzieh Bakhshayeshkaram
OBJECTIVE: To determine the prevalence of fractures and associated risk factors in healthy Iranian children and adolescents. METHODS: In this cross sectional population based study, 478 healthy Iranian children and adolescents aged 9-18 years old participated. Baseline data and bone mineral content and density have been determined. One questionnaire was completed for all individuals including previous history of fracture, its location, and level of trauma. Albumin, calcium, phosphorus, alkaline phosphatase, and vitamin D levels were measured...
January 2017: Bulletin of Emergency and Trauma
https://www.readbyqxmd.com/read/28197890/relationships-among-diet-physical-activity-and-dual-plane-dual-energy-x-ray-absorptiometry-bone-outcomes-in-pre-pubertalgirls
#6
Jie Ren, Lynn S Brann, Kay S Bruening, Tamara A Scerpella, Jodi N Dowthwaite
In pre-pubertal girls, nutrient intakes and non-aquatic organized activity were evaluated as factors in vertebral body bone mass, structure, and strength. Activity, vitamin B12, and dietary fiber predicted bone outcomes most consistently. Exercise and vitamin B12 appear beneficial, whereas high fiber intake appears to be adverse for vertebral body development. PURPOSE: Childhood development sets the baseline for adult fracture risk. Most studies evaluate development using postero-anterior (PA) dual-energy X-ray absorptiometry (DXA) areal bone mineral density, bone mineral content, and bone mineral apparent density...
December 2017: Archives of Osteoporosis
https://www.readbyqxmd.com/read/28196789/the-relationship-of-disordered-eating-attitudes-with-stress-level-bone-turnover-markers-and-bone-mineral-density-in-obese-adolescents
#7
Aslı Okbay Güneş, Müjgan Alikaşifoğlu, Ezgi Şen Demirdöğen, Ethem Erginöz, Türkay Demir, Mine Kucur, Oya Ercan
OBJECTIVE: To investigate the effect of stress caused by disordered eating attitudes on bone health in obese adolescents. METHODS: A cross-sectional study comprising 80 obese adolescents was performed from November 2013 to September 2014. Twenty-four-hour urinary free cortisol levels were measured as a biological marker of stress. Bone turnover was evaluated using bone-specific alkaline phosphatase, serum osteocalcin, and urinary N-telopeptide measurements. Bone mineral density was measured using dual-energy X-ray absorptiometry...
February 15, 2017: Journal of Clinical Research in Pediatric Endocrinology
https://www.readbyqxmd.com/read/28181694/a-genome-wide-association-study-identifies-two-sex-specific-loci-at-sptb-and-izumo3-influencing-pediatric-bone-mineral-density-at-multiple-skeletal-sites
#8
Alessandra Chesi, Jonathan A Mitchell, Heidi J Kalkwarf, Jonathan P Bradfield, Joan M Lappe, Diana L Cousminer, Sani M Roy, Shana E McCormack, Vicente Gilsanz, Sharon E Oberfield, Hakon Hakonarson, John A Shepherd, Andrea Kelly, Babette S Zemel, Struan F A Grant
Failure to achieve optimal bone mineral accretion during childhood and adolescence results in subsequent suboptimal peak bone mass, contributing to osteoporosis risk later in life. To identify novel genetic factors that influence pediatric bone mass at discrete skeletal sites, we performed a sex-stratified genome-wide association study of areal bone mineral density (BMD) measured by dual energy X-ray absorptiometry at the 1/3 distal radius, spine, total hip and femoral neck in a cohort of 933 healthy European American children...
February 9, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28166122/determinants-of-bone-outcomes-in-adolescent-athletes-at-baseline-the-pro-bone-study
#9
Dimitris Vlachopoulos, Esther Ubago-Guisado, Alan R Barker, Brad S Metcalf, Ioannis G Fatouros, Alexandra Avloniti, Karen M Knapp, Luis A Moreno, Craig A Williams, Luis Gracia-Marco
PURPOSE: The determinants of areal bone mineral density (aBMD) and hip geometry estimates in adolescent athletes are poorly understood. This study aimed to identify the determinants of aBMD and hip geometry estimates in adolescent male athletes. METHODS: One hundred twenty one males (13.1±0.1 years) were measured: 41 swimmers, 37 footballers, 29 cyclists and 14 controls. Dual energy X-ray absorptiometry (DXA) measured aBMD at lumbar spine, femoral neck (FN) and total body...
February 4, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28165410/bone-mineral-density-mechanical-microstructural-properties-and-mineral-content-of-the-femur-in-growing-rats-fed-with-cactus-opuntia-ficus-indica-l-mill-cactaceae-cladodes-as-calcium-source-in-diet
#10
Ezequiel Hernández-Becerra, Elsa Gutiérrez-Cortez, Alicia Del Real, Alejandra Rojas-Molina, Mario Rodríguez-García, Efraín Rubio, Michelle Quintero-García, Isela Rojas-Molina
Mechanical, microstructural properties, mineral content and bone mineral density (BMD) of the femur were evaluated in growing rats fed with Opuntia ficus indica (L.) Mill. (Cactaceae) cladodes at different maturity stages as calcium source. Male weanling rats were fed with cladodes at early maturity stage (25 and 60 days of age, belonging to groups N-60 and N-200, respectively) and cladodes at late maturity stage (100 and 135 days of age, belonging to groups N-400 and N-600, respectively) for 6 weeks. Additionally, a control group fed with calcium carbonate as calcium source was included for comparative purposes...
February 4, 2017: Nutrients
https://www.readbyqxmd.com/read/28152193/impact-of-low-weight-severity-and-menstrual-status-on-bone-in-adolescent-girls-with-anorexia-nervosa
#11
Nurgun Kandemir, Kendra Becker, Meghan Slattery, Shreya Tulsiani, Vibha Singhal, Jennifer J Thomas, Kathryn Coniglio, Hang Lee, Karen K Miller, Kamryn T Eddy, Anne Klibanski, Madhusmita Misra
Clinicians currently use different low-weight cut-offs both to diagnose anorexia nervosa (AN) and to determine AN severity in adolescent girls. The purpose of this study was to evaluate the clinical utility of existing cut-offs and severity criteria by determining which are most strongly associated with risk for low bone mineral density (BMD). Height adjusted BMD Z scores were calculated for 352 females: 262 with AN and 90 healthy controls (controls) (12-20.5 years), using data from the BMD in Childhood Study, for the lumbar spine, whole body less head, and total hip...
February 2, 2017: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/28137405/contraception-for-adolescents-with-chronic-rheumatic-diseases
#12
Benito Lourenço, Katia T Kozu, Gabriela N Leal, Marco F Silva, Elisabeth G C Fernandes, Camila M P França, Fernando H C Souza, Clovis A Silva
Contraception is an important issue and should be a matter of concern in every medical visit of adolescent and young patients with chronic rheumatic diseases. This narrative review discusses contraception methods in adolescents with juvenile systemic lupus erythematosus (JSLE), antiphospholipid syndrome (APS), juvenile idiopathic arthritis (JIA) and juvenile dermatomyositis (JDM). Barrier methods are safe and their use should be encouraged for all adolescents with chronic rheumatic diseases. Combined oral contraceptives (COC) are strictly prohibited for JSLE and APS patients with positive antiphospholipid antibodies...
January 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28117876/interventions-to-prevent-and-treat-corticosteroid-induced-osteoporosis-and-prevent-osteoporotic-fractures-in-duchenne-muscular-dystrophy
#13
REVIEW
Jennifer M Bell, Michael D Shields, Janet Watters, Alistair Hamilton, Timothy Beringer, Mark Elliott, Rosaline Quinlivan, Sandya Tirupathi, Bronagh Blackwood
BACKGROUND: Corticosteroid treatment is considered the 'gold standard' for Duchenne muscular dystrophy (DMD); however, it is also known to induce osteoporosis and thus increase the risk of vertebral fragility fractures. Good practice in the care of those with DMD requires prevention of these adverse effects. Treatments to increase bone mineral density include bisphosphonates and vitamin D and calcium supplements, and in adolescents with pubertal delay, testosterone. Bone health management is an important part of lifelong care for patients with DMD...
January 24, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28105511/bone-density-in-the-obese-child-clinical-considerations-and-diagnostic-challenges
#14
Jennifer C Kelley, Nicola Crabtree, Babette S Zemel
The prevalence of obesity in children has reached epidemic proportions. Concern about bone health in obese children, in part, derives from the potentially increased fracture risk associated with obesity. Additional risk factors that affect bone mineral accretion, may also contribute to obesity, such as low physical activity and nutritional factors. Consequences of obesity, such as inflammation, insulin resistance, and non-alcoholic fatty liver disease, may also affect bone mineral acquisition, especially during the adolescent years when rapid increases in bone contribute to attaining peak bone mass...
January 20, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28101776/plyometric-exercise-and-bone-health-in-children-and-adolescents-a-systematic-review
#15
REVIEW
Alejandro Gómez-Bruton, Ángel Matute-Llorente, Alejandro González-Agüero, José A Casajús, Germán Vicente-Rodríguez
BACKGROUND: Many jumping interventions have been performed in children and adolescents in order to improve bone-related variables and thus, ensure a healthy bone development during these periods and later in life. This systematic review aims to summarize and update present knowledge regarding the effects that jumping interventions may have on bone mass, structure and metabolism in order to ascertain the efficacy and durability (duration of the effects caused by the intervention) of the interventions...
January 19, 2017: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/28089957/the-epigenetic-clock-and-physical-development-during-childhood-and-adolescence-longitudinal-analysis-from-a-uk-birth-cohort
#16
Andrew J Simpkin, Laura D Howe, Kate Tilling, Tom R Gaunt, Oliver Lyttleton, Wendy L McArdle, Susan M Ring, Steve Horvath, George Davey Smith, Caroline L Relton
BACKGROUND: Statistical models that use an individual's DNA methylation levels to estimate their age (known as epigenetic clocks) have recently been developed, with 96% correlation found between epigenetic and chronological age. We postulate that differences between estimated and actual age [age acceleration (AA)] can be used as a measure of developmental age in early life. METHODS: We obtained DNA methylation measures at three time points (birth, age 7 years and age 17 years) in 1018 children from the Avon Longitudinal Study of Parents and Children (ALSPAC)...
January 15, 2017: International Journal of Epidemiology
https://www.readbyqxmd.com/read/28088646/bone-microarchitecture-in-adolescent-boys-with-autism-spectrum-disorder
#17
Ann M Neumeyer, Natalia Cano Sokoloff, Erin McDonnell, Eric A Macklin, Christopher J McDougle, Madhusmita Misra
BACKGROUND: Boys with autism spectrum disorder (ASD) have lower areal bone mineral density (aBMD) than typically developing controls (TDC). Studies of volumetric BMD (vBMD) and bone microarchitecture provide information about fracture risk beyond that provided by aBMD but are currently lacking in ASD. OBJECTIVES: To assess ultradistal radius and distal tibia vBMD, bone microarchitecture and strength estimates in adolescent boys with ASD compared to TDC. DESIGN/METHODS: Cross-sectional study of 34 boys (16 ASD, 18 TDC) that assessed (i) aBMD at the whole body (WB), WB less head (WBLH), hip and spine using dual X-ray absorptiometry (DXA), (ii) vBMD and bone microarchitecture at the ultradistal radius and distal tibia using high-resolution peripheral quantitative CT (HRpQCT), and (iii) bone strength estimates (stiffness and failure load) using micro-finite element analysis (FEA)...
January 11, 2017: Bone
https://www.readbyqxmd.com/read/28054655/unique-local-bone-tissue-characteristics-in-iliac-crest-bone-biopsy-from-adolescent-idiopathic-scoliosis-with-severe-spinal-deformity
#18
Zhiwei Wang, Huanxiong Chen, Y Eric Yu, Jiajun Zhang, Ka-Yee Cheuk, Bobby K W Ng, Yong Qiu, X Edward Guo, Jack C Y Cheng, Wayne Y W Lee
Adolescent idiopathic scoliosis is a complex disease with unclear etiopathogenesis. Systemic and persistent low bone mineral density is an independent prognostic factor for curve progression. The fundamental question of how bone quality is affected in AIS remains controversy because there is lack of site-matched control for detailed analysis on bone-related parameters. In this case-control study, trabecular bone biopsies from iliac crest were collected intra-operatively from 28 severe AIS patients and 10 matched controls with similar skeletal and sexual maturity, anthropometry and femoral neck BMD Z-score to control confounding effects...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28053645/do-metabolic-syndrome-and-its-components-have-an-impact-on-bone-mineral-density-in-adolescents
#19
REVIEW
Valéria Nóbrega da Silva, Luciana Nunes Mosca Fiorelli, Carla Cristiane da Silva, Cilmery Suemi Kurokawa, Tamara Beres Lederer Goldberg
In recent years, there has been growing concern about the occurrence of metabolic syndrome (MetS) at an early age and its effects on bone mass in adolescents. Adolescence is considered a critical period for bone mass gain. Impaired bone acquisition during this phase can lead to "suboptimal" peak bone mass and increase the risk of osteopenia/osteoporosis and fractures in old age. The objective of this review was to perform a critical analysis of articles that specifically focus on this age group, evaluating the influence of MetS and its components on bone mineral density in adolescents...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28026207/impact-sports-and-bone-fractures-among-adolescents
#20
Kyle R Lynch, Han C G Kemper, Bruna Turi-Lynch, Ricardo R Agostinete, Igor H Ito, Rafael Luiz-De-Marco, Mario A Rodrigues-Junior, Rômulo A Fernandes
The objective of the present study was to investigate the effects of different sports on stress fractures among adolescents during a 9-month follow-up period. The sample was composed of 184 adolescents divided into three groups (impact sports [n = 102]; swimming [n = 35]; non-sports [n = 47]). The occurrence of stress fracture was reported by participants and coaches. As potential confounders we considered age, sex, resistance training, body composition variables and age at peak of height velocity. There were 13 adolescents who reported fractures during the 9-month period...
December 27, 2016: Journal of Sports Sciences
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