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Calcified Tissue International

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https://www.readbyqxmd.com/read/28432379/high-resolution-tomography-based-quantification-of-cortical-porosity-and-cortical-thickness-at-the-surgical-neck-of-the-humerus-during-aging
#1
Tobias Helfen, Christoph M Sprecher, Ursula Eberli, Boyko Gueorguiev, Peter E Müller, Robert G Richards, Florian Schmidutz
Fractures of the proximal humerus are highly related to age and osteoporotic bone remodeling. Previous studies have highlighted the cortex as a major side of the bone loss, but the microstructural changes of the humerus have not been evaluated entirely. Sixty-four (n = 64) humeri of a representative collective (18-100 years) were scanned with high-resolution peripheral quantitative computed tomography (82 µm). Bone mineral density (BMD), trabecular bone volume fraction (Tb.BV/TV), cortical thickness (Ct...
April 21, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28421264/epidemiology-of-sarcopenia-determinants-throughout-the-lifecourse
#2
S C Shaw, E M Dennison, C Cooper
Sarcopenia is an age-related syndrome characterised by progressive and generalised loss of skeletal muscle mass and strength; it is a major contributor to the risk of physical frailty, functional impairment in older people, poor health-related quality of life and premature death. Many different definitions have been used to describe sarcopenia and have resulted in varying estimates of prevalence of the condition. The most recent attempts of definitions have tried to integrate information on muscle mass, strength and physical function and provide a definition that is useful in both research and clinical settings...
April 18, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28421263/bone-mineral-density-and-fracture-risk-in-ankylosing-spondylitis-a-meta-analysis
#3
Cara Pray, Neelufor Irene Feroz, Nisha Nigil Haroon
We conducted a meta-analysis of studies to examine the risk of vertebral and non-vertebral fractures in patients with ankylosing spondylitis (AS). Additionally, we evaluated the risk factors of vertebral fractures in AS. Two authors independently searched Embase and Medline for studies that had assessed the risk of fractures in patients with AS. Twenty-two studies were eligible for the meta-analysis. Patients with AS had high frequency of vertebral fractures [OR (95% CI): 1.96 (1.52-2.51)]. Major risk factors for vertebral fractures in patients with AS include low BMD at the femoral neck and total hip, male gender, longer disease duration, higher BASDAI, higher BASRI, and possibly inflammatory bowel disease...
April 18, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28417148/relationship-between-nutritional-factors-and-hip-bone-density-in-individuals-with-chronic-stroke
#4
Samuel K Y Li, Mabel M P Wan, Frankie P L Siu, Susan Chung, Marco Y C Pang
The aim of this study was to investigate the relationship between dietary habits and hip bone health in community-dwelling individuals with chronic stroke. The usual dietary intake of 94 individuals with chronic stroke (30 women, mean age: 59.0 years) was assessed by a 3-day food record within a single week. Dual-energy X-ray absorptiometry was used to measure bone mineral density (BMD) at both hips. The results showed that low hip bone mass was found in 59 and 50 of the participants on the affected and unaffected side, respectively...
April 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28417147/cortical-histomorphometry-of-the-human-humerus-during-ontogeny
#5
Rosie Pitfield, Justyna J Miszkiewicz, Patrick Mahoney
Modeling and remodeling are two key determinants of human skeletal growth though little is known about the histomorphometry of cortical bone during ontogeny. In this study, we examined the density and geometric properties of primary and secondary osteons (osteon area and diameter, vascular canal area and diameter) in subperiosteal cortical bone from the human humerus (n = 84) between birth and age 18 years. Sections were removed from the anterior midshaft aspect of humeri from skeletons. Age-at-death was reconstructed using standard osteological techniques...
April 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28391432/thyroxine-exposure-effects-on-the-cranial-base
#6
Emily Durham, R Nicole Howie, Trish Parsons, Grace Bennfors, Laurel Black, Seth M Weinberg, Mohammed Elsalanty, Jack C Yu, James J Cray
Thyroid hormone is important for skull bone growth, which primarily occurs at the cranial sutures and synchondroses. Thyroid hormones regulate metabolism and act in all stages of cartilage and bone development and maintenance by interacting with growth hormone and regulating insulin-like growth factor. Aberrant thyroid hormone levels and exposure during development are exogenous factors that may exacerbate susceptibility to craniofacial abnormalities potentially through changes in growth at the synchondroses of the cranial base...
April 8, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28391431/sclerostin-antibody-increases-callus-size-and-strength-but-does-not-improve-fracture-union-in-a-challenged-open-rat-fracture-model
#7
Alyson Morse, Michelle M McDonald, Aaron Schindeler, Lauren Peacock, Kathy Mikulec, Tegan L Cheng, Min Liu, Hua Zhu Ke, David G Little
Open fractures remain a challenge in orthopedics. Current strategies to intervene are often inadequate, particularly in severe fractures or when treatment is delayed. Sclerostin is a negative regulator of bone growth and sclerostin-neutralizing antibodies (Scl-Ab) can increase bone mass and strength. The application of these antibodies to improve orthopedic repair has shown varied results, and may be dependent on the location and severity of the bony injury. We examined Scl-Ab treatment within an established rat osteotomy model with periosteal stripping analogous to open fracture repair...
April 8, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28389692/familial-early-onset-paget-s-disease-of-bone-associated-with-a-novel-hnrnpa2b1-mutation
#8
Xuan Qi, Qianqian Pang, Jiawei Wang, Zhen Zhao, Ou Wang, Lijun Xu, Jiangfeng Mao, Yan Jiang, Mei Li, Xiaoping Xing, Wei Yu, Asan, Weibo Xia
Paget disease of bone (PDB) is a common metabolic bone disease characterized by increased bone resorption and disorganized bone formation which affect single or multiple sites of bones. Although the exact cause of PDB is still controversial, genetic factors are considered to play an important role in PDB. Several genes involved in the differentiation or function of osteoclast were shown to be associated with PDB or related syndrome such as SQSTM1, TNFRSF11A, TNFRSF11B, and ZNF687. Multisystem proteinopathy (MSP), a newly proposed syndrome including inclusion body myopathy (IBM), PDB, frontotemporal dementia (FTD), and amyotrophic lateral sclerosis (ALS), is mainly caused by mutation in VCP gene...
April 7, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28389691/deletion-of-adseverin-in-osteoclasts-affects-cell-structure-but-not-bone-metabolism
#9
Yixuan Cao, Yongqiang Wang, Sara Sprangers, Daisy I Picavet, Michael Glogauer, Christopher A McCulloch, Vincent Everts
Adseverin is an actin-severing/capping protein that may contribute to osteoclast differentiation in vitro but its role in bone remodeling of healthy animals is not defined. We analyzed bone and osteoclast structure in adseverin conditional null mice at alveolar and long bone sites. In wild-type and adseverin null mice, as measured by dual-energy X-ray absorptiometry, there were no differences of bone mineral content or bone mineral density, indicating no change of bone metabolism. In tibiae, TRAcP(+) osteoclasts were formed in comparable numbers in adseverin null and wild-type mice...
April 7, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28374176/bone-matrix-maturation-in-a-rat-model-of-intra-cortical-bone-remodeling
#10
Ryan D Ross, D Rick Sumner
Matrix maturation within cortical bone is an important but oft-neglected component of bone remodeling because of the lack of a suitable small animal model. Intra-cortical remodeling can be induced in rodents by feeding virgin or lactating animals a low-calcium diet. The current study aimed to determine which of these two models is most suitable for studying intra-cortical matrix maturation. We compared intra-cortical remodeling in female rats fed a normal calcium diet (virgin/normal Ca), a low-calcium diet (virgin/low Ca), or a low-calcium diet during lactation (lactation/low Ca)...
April 3, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28374175/extensive-bmi-gain-in-puberty-is-associated-with-lower-increments-in-bone-mineral-density-in-estonian-boys-with-overweight-and-obesity-a-3-year-longitudinal-study
#11
Eva Mengel, Vallo Tillmann, Liina Remmel, Pille Kool, Priit Purge, Evelin Lätt, Jaak Jürimäe
The aim of this 3-year prospective study was to examine changes in bone mineral characteristics during pubertal maturation in boys with different BMI values at the beginning of puberty and with different BMI increments during puberty. 26 boys with overweight and obesity (OWB) and 29 normal weight boys (NWB) were studied yearly for 3 years from the age of 11 years to measure the changes in different bone mineral characteristics. The OWB group was further divided into two subgroups according to extensive or non-extensive BMI increment during 3-year period...
April 3, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28374174/serum-sclerostin-increases-after-acute-physical-activity
#12
Marie-Eva Pickering, Marie Simon, Elisabeth Sornay-Rendu, Karim Chikh, Marie-Christine Carlier, Anne-Lise Raby, Pawel Szulc, Cyrille B Confavreux
Physical activity has a major impact on bone density and on osteoporosis prevention. Sclerostin is produced by osteocytes and inhibits bone formation. The impact of exercise on sclerostin secretion has not been studied so far. This pilot study aimed to explore circulating sclerostin levels immediately after acute exercise. Healthy young women practicing physical activity less than 120 min per week were enrolled. The exercise was a 45-min, low-speed, treadmill running test. Blood samples were taken at rest before exercise and within 5 min after the end of exercise...
April 3, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28361207/antibody-response-to-paramyxoviruses-in-paget-s-disease-of-bone
#13
Micaela Rios Visconti, Ricardo Usategui-Martín, Stuart H Ralston
Paget's disease of bone (PDB) is a common skeletal disorder characterised by focal abnormalities of increased and disorganised bone turnover. Genetic factors play a central role in the pathogenesis of PDB but environmental factors also contribute. Measles virus (MV), respiratory syncytial virus (RSV) and canine distemper virus (CDV) have all been implicated as potential disease triggers but the data are conflicting. Since chronic paramyxovirus infection with measles is known to be accompanied by increased production of antiviral antibodies, we have analysed circulating concentrations of antibodies to MV, CDV, and RSV as well as mumps, rubella and varicella zoster virus (VZV) in 463 patients with PDB and 220 aged and gender-matched controls...
March 31, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28349184/the-reliability-of-a-semi-automated-algorithm-for-detection-of-cortical-interruptions-in-finger-joints-on-high-resolution-ct-compared-to-microct
#14
M Peters, A Scharmga, A van Tubergen, J Arts, D Loeffen, R Weijers, B van Rietbergen, P Geusens, J P van den Bergh
We developed a semi-automated algorithm for the detection of cortical interruptions in finger joints using high-resolution peripheral quantitative computed tomography (HR-pQCT). Here, we tested its reliability compared to microCT (µCT) as gold standard. Nineteen joints of 10 female anatomic index fingers were imaged by HR-pQCT and µCT (82 and 18 µm isotropic voxel sizes, respectively). The algorithm was applied for detection of cortical interruptions of different minimum diameters (range >0.16 to >0...
March 28, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28337514/effect-of-sequential-treatment-with-bisphosphonates-after-teriparatide-in-ovariectomized-rats-a-direct-comparison-between-risedronate-and-alendronate
#15
Tetsuo Yano, Mei Yamada, Daisuke Inoue
Teriparatide (TPTD), a recombinant human parathyroid hormone N-terminal fragment (1-34), is a widely used bone anabolic drug for osteoporosis. Sequential treatment with antiresorptives such as bisphosphonates after TPTD discontinuation is generally recommended. However, relative effects of bisphosphonates have not been determined. In the present study, we directly compared effects of risedronate (RIS) and alendronate (ALN) on bone mineral density (BMD), bone turnover, structural property and strength in ovariectomized (OVX) rats, when administered after TPTD...
March 23, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28324124/osteoporosis-in-frail-patients-a-consensus-paper-of-the-belgian-bone-club
#16
REVIEW
E Gielen, P Bergmann, O Bruyère, E Cavalier, P Delanaye, S Goemaere, J-M Kaufman, M Locquet, J-Y Reginster, S Rozenberg, A-M Vandenbroucke, J-J Body
In this consensus paper, the Belgian Bone Club aims to provide a state of the art on the epidemiology, diagnosis, and management of osteoporosis in frail individuals, including patients with anorexia nervosa, patients on dialysis, cancer patients, persons with sarcopenia, and the oldest old. All these conditions may indeed induce bone loss that is superimposed on physiological bone loss and often remains under-recognized and under-treated. This is of particular concern because of the major burden of osteoporotic fractures in terms of morbidity, mortality, and economic cost...
March 21, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28324123/long-term-bone-scintigraphy-results-after-intravenous-zoledronate-in-paget-s-disease-of-bone
#17
Ian R Reid, Katherine Maslowski
Zoledronate produces long-term normalization of biochemical markers in Paget's disease but whether this implies the absence of active disease is unknown. We have determined whether bone scintigraphy, a more sensitive index of disease activity, is also normalized ≥5 years after treatment with zoledronate. A consecutive case series of 11 individuals with Paget's disease treated with zoledronate 5 mg ≥5 years previously is reported. Eight patients received a single zoledronate infusion and were assessed 55-120 months later...
March 21, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28303319/effect-of-sdf-1-cxcr4-signaling-antagonist-amd3100-on-bone-mineralization-in-distraction-osteogenesis
#18
Jia Xu, Yuanfeng Chen, Yang Liu, Jinfang Zhang, Qinglin Kang, Kiwai Ho, Yimin Chai, Gang Li
Distraction osteogenesis (DO) is a widely applied technique in orthopedics surgery, which involves rapid stem cell migration, homing, and differentiation. Interactions between the chemokine receptor Cxcr4 and its ligand, stromal derived factor-1 (SDF-1), regulate hematopoietic stem cell trafficking to the ischemic area and induce their subsequent differentiation. Here, we examined SDF-1 expression and further investigated the role of SDF-1/Cxcr4 signaling antagonist AMD3100 during bone regeneration in rat DO model...
March 16, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28303318/bone-alkaline-phosphatase-and-tartrate-resistant-acid-phosphatase-potential-co-regulators-of-bone-mineralization
#19
Cecilia Halling Linder, Barbro Ek-Rylander, Michael Krumpel, Maria Norgård, Sonoko Narisawa, José Luis Millán, Göran Andersson, Per Magnusson
Phosphorylated osteopontin (OPN) inhibits hydroxyapatite crystal formation and growth, and bone alkaline phosphatase (BALP) promotes extracellular mineralization via the release of inorganic phosphate from the mineralization inhibitor inorganic pyrophosphate (PPi). Tartrate-resistant acid phosphatase (TRAP), produced by osteoclasts, osteoblasts, and osteocytes, exhibits potent phosphatase activity towards OPN; however, its potential capacity as a regulator of mineralization has not previously been addressed...
March 16, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28289801/erratum-to-assessing-risk-of-osteoporotic-fractures-in-primary-care-development-and-validation-of-the-fra-hs-algorithm
#20
Francesco Lapi, Elisa Bianchini, Raffaella Michieli, Alessandro Pasqua, Iacopo Cricelli, Giampiero Mazzaglia, Bruno Frediani, Daniel Prieto-Alhambra, Maria Luisa Brandi, Claudio Cricelli
No abstract text is available yet for this article.
March 13, 2017: Calcified Tissue International
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