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Calcified Tissue International

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https://www.readbyqxmd.com/read/28624935/eldecalcitol-an-active-vitamin-d3-derivative-prevents-trabecular-bone-loss-and-bone-fragility-in-type-i-diabetic-model-rats
#1
Satoshi Takeda, Mitsuru Saito, Sadaoki Sakai, Kenji Yogo, Keishi Marumo, Koichi Endo
Diabetes mellitus is known to adversely affect the bones and be associated with increased fracture risk. We examined whether eldecalcitol (ELD), an active vitamin D3 derivative, could inhibit the diabetic bone loss in streptozotocin-induced type I diabetic rats. ELD (10, 20, or 40 ng/kg), alfacalcidol (ALF; 25, 50, or 100 ng/kg), or vehicle was administered 5 times per week for 12 weeks from 1 week after diabetes induction. Normal control rats received the vehicle. Bone turnover markers, bone mineral density (BMD), and biomechanical strength of the lumbar spine and femur were measured, and bone histomorphometry was performed...
June 17, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28612084/histological-evaluation-of-bone-repair-with-hydroxyapatite-a-systematic-review
#2
REVIEW
Héllen L Oliveira, Wellington L O Da Rosa, Carlos E Cuevas-Suárez, Neftali L V Carreño, Adriana F da Silva, Thomas N Guim, Odir A Dellagostin, Evandro Piva
The aim of this study was to evaluate the morphological bone response in animal experiments by applying hydroxyapatite grafts in critical and non-critical size bone defects. Current report followed the guidelines established by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Animal experiments were selected by assessing repair of bone defects with hydroxyapatite as bone graft and with blood clot only as control. Eight articles were identified in specialized literature and included in the meta-analysis...
June 13, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28589206/micrornas-and-fracture-healing
#3
REVIEW
Mary Nugent
MicroRNAs (miRNAs) are small molecules found to have major regulatory roles in many biological processes. This review aims to provide an overview of the recent advances in knowledge of the role of miRNAs in fracture healing and bone repair. A search of the published literature was performed (using the PubMed database) to include all relevant studies published in English. These studies were then reviewed and the results condensed into this review paper. MiRNAs have now been shown to have significant alterations in expression levels in bone tissue in the presence of fractures...
June 6, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28589205/effects-of-teriparatide-and-sequential-minodronate-on-lumbar-spine-bone-mineral-density-and-microarchitecture-in-osteoporosis
#4
Daichi Miyaoka, Yasuo Imanishi, Masaya Ohara, Noriyuki Hayashi, Yuki Nagata, Shinsuke Yamada, Katsuhito Mori, Masanori Emoto, Masaaki Inaba
The trabecular bone score (TBS) is a new surrogate for trabecular bone microarchitecture assessment, independent of bone mineral density (BMD), calculated from pixel gray-level variations in the lumbar spine (LS) dual-energy X-ray absorptiometry (DXA) image. Although Teriparatide (TPTD) increased LS-BMD as well as TBS in 2 years, the precise time-course of these parameters was not well known. The aim of this study was to determine the changes in LS-BMD and the TBS in osteoporotic patients treated with TPTD, followed by minodronate (MINO)...
June 6, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28547346/ketogenic-diet-compromises-both-cancellous-and-cortical-bone-mass-in-mice
#5
Xiuhua Wu, Zucheng Huang, Xiaomeng Wang, Zhaozong Fu, Junhao Liu, Zhiping Huang, Ganggang Kong, Xiaolin Xu, Jianyang Ding, Qingan Zhu
To clarify osteoporotic effects of ketogenic diet (KD) on cancellous and cortical bone compared with ovariectomy (OVX) in mice. Forty female C57BL/6J 8-week-old mice were randomly divided into SD+Sham, SD+OVX, KD+Sham, and KD+OVX groups, and fed for 12 weeks. The distal femur of trabecular bone and the middle femur of cortical bone were evaluated with Micro-CT scanning. The maximum bending force and stiffness of the tibia were calculated using a three-point bending test. Osteoblast and osteoclast expression of femur were identified using tartrate-resistant acid phosphatase (TRAP), collagen type I (CoLI), and osteocalcin (OCN) staining...
May 25, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28536889/the-phenotype-of-patients-with-a-recent-fracture-a-literature-survey-of-the-fracture-liaison-service
#6
REVIEW
Lisanne Vranken, Caroline E Wyers, Joop P W van den Bergh, Piet P M M Geusens
The aetiology of fractures in patients aged 50 years and older is multifactorial, and includes bone- and fall-related risks. The Fracture Liaison Service (FLS) is recommended to identify patients with a recent fracture and to evaluate their subsequent fracture risk, in order to take measures to decrease the risk of subsequent fractures in patients with a high risk phenotype. A literature survey was conducted to describe components of the bone- and fall-related phenotype of patients attending the FLS. Components of the patient phenotype at the FLS have been reported in 33 studies...
May 24, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28534161/autoantibodies-to-osteoprotegerin-are-associated-with-low-hip-bone-mineral-density-and-history-of-fractures-in-axial-spondyloarthritis-a-cross-sectional-observational-study
#7
Barbara Hauser, Sizheng Zhao, Micaela R Visconti, Philip L Riches, William D Fraser, Isabelle Piec, Nicola J Goodson, Stuart H Ralston
Osteoporosis is a recognised complication of axial spondyloarthritis (axSpA) and is thought to be due to functional impairment and the osteoclast-activating effects of proinflammatory cytokines. The development of autoantibodies to OPG (OPG-Ab) has been associated with severe osteoporosis and increased bone resorption in rheumatoid arthritis. In this study, we screened for the presence of OPG-Ab in axSpA and reviewed their clinical significance. We studied 134 patients, recruited from two centres in the United Kingdom...
May 22, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28530017/mechanical-stress-by-spasticity-accelerates-fracture-healing-after-spinal-cord-injury
#8
Naoyoshi Sakitani, Hiroyuki Iwasawa, Masato Nomura, Yasushi Miura, Hiroshi Kuroki, Junya Ozawa, Hideki Moriyama
Accelerated fracture healing in patients with spinal cord injuries (SCI) is often encountered in clinical practice. However, there is no distinct evidence in the accelerated fracture healing, and the mechanisms of accelerated fracture healing in SCI are poorly understood. We aimed to determine whether SCI accelerated fracture healing in morphology and strength, to characterize the healing process with SCI, and to clarify the factors responsible for accelerated fracture healing. In total, 39 male Wistar rats were randomly divided into healthy control without intervention, SCI only, fracture with SCI, botulinum toxin (BTX) A-treated fracture with SCI, and propranolol-treated fracture with SCI groups...
May 22, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28528404/a-direct-comparison-of-the-effects-of-the-antiretroviral-drugs-stavudine-tenofovir-and-the-combination-lopinavir-ritonavir-on-bone-metabolism-in-a-rat-model
#9
M M Conradie, M van de Vyver, E Andrag, M Conradie, W F Ferris
Antiretroviral (ARV) treatment may induce metabolic complications in HIV patients on long-term therapy that can affect bone health. In this study, the effects of the ARVs Stavudine (d4T), Tenofovir (TDF) and Lopinavir/ritonavir (LPV/r) on bone metabolism and lipodystrophy were directly compared in rats to negate the consequences of HIV-associated confounding factors. Healthy 12-14-week-old male Wistar rats (n = 40) were divided into four treatment groups and received an oral animal equivalent dose of either Stavudine (6...
May 20, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28508265/incidence-of-vertebral-fractures-in-women-with-systemic-lupus-erythematosus-after-8-years-of-follow-up
#10
Mario García-Carrasco, Claudia Mendoza-Pinto, María de la Luz León-Vázquez, Socorro Méndez-Martínez, Ivet Etchegaray-Morales, Álvaro Montiel-Jarquín, Miguel Angel Enriquez-Guerra, Margarita Muñóz-Guarneros, José Luis Gálvez-Romero, Pamela Soto-Santillán, Ricard Cervera
The aim of this study was to evaluate possible associations between potential risk factors and the occurrence of established vertebral fractures (VF) in Mexican patients with systemic lupus erythematosus (SLE). Consecutive patients with SLE were enrolled in a prospective, observational study from 2006 to 2015. Information on potential risk factors, including demographics, clinical data, and bone mineral density (BMD) at the lumbar spine and hip on dual-energy X-ray absorptiometry was collected at baseline and follow-up...
May 15, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28500448/bone-loss-after-denosumab-only-partial-protection-with-zoledronate
#11
Ian R Reid, Anne M Horne, Borislav Mihov, Gregory D Gamble
A case series of six women with postmenopausal osteoporosis who had received continuous denosumab for 7 years and were then given a single infusion of zoledronate (5 mg) is reported. During denosumab treatment, bone mineral density (BMD) in the spine increased 18.5% (P = 0.006), and total hip BMD by 6.9% (P = 0.03). Post-zoledronate BMDs were measured 18-23 months after treatment, and there were significant declines at each site (P spine = 0.043, P hip = 0.005). Spine BMD remained significantly above the pre-denosumab baseline (+9...
May 13, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28497190/abstracts-of-the-ects-congress-2017
#12
(no author information available yet)
No abstract text is available yet for this article.
May 11, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28492981/evidence-that-osteocytes-in-autogenous-bone-fragments-can-repair-disrupted-canalicular-networks-and-connect-with-osteocytes-in-de-novo-formed-bone-on-the-fragment-surface
#13
Furqan A Shah, Anders Palmquist
Autogenous bone fragments generated during surgery (e.g. implant site preparation) accelerate bone formation by the release of a large variety of growth factors from the extracellular matrix and the cells contained within. Osteocytes, whether viable or apoptotic, within such fragments are able to recruit osteoclasts to a site of bone remodelling. Here, using correlative scanning electron microscopy, we provide compelling evidence that at one week healing in the Sprague Dawley rat tibia, following surgery (and/or the placement of a bone-anchored implant), autogenous bone fragments support bone formation on their surface...
May 10, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28474171/disruption-of-the-aldehyde-dehydrogenase-2-gene-results-in-no-increase-in-trabecular-bone-mass-due-to-skeletal-loading-in-association-with-impaired-cell-cycle-regulation-through-p21-expression-in-the-bone-marrow-cells-of-mice
#14
Kayoko Furukawa Okuma, Kunitaka Menuki, Manabu Tsukamoto, Takafumi Tajima, Hokuto Fukuda, Yasuaki Okada, Toshiharu Mori, Takuto Tsuchiya, Toshihiro Kawamoto, Yasuhiro Yoshida, Soshi Uchida, Akinori Sakai
Approximately 45% of people of East Asian descent have the inactive aldehyde dehydrogenase 2 (ALDH2) phenotype. The enzyme defect of ALDH2 has been found to adversely influence the risk of osteoporosis. The aim of this study was to clarify the effect of skeletal loading on trabecular bone structure and dynamics in Aldh2-disrupted mice in the absence of alcohol consumption. Four-week-old male Aldh2(-/-) (KO) and Aldh2(+/+) (WT) mice were divided into a ground control (GC) group and a climbing exercise (CE) group in each genotype...
May 4, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28474170/muscle-function-in-osteogenesis-imperfecta-type-iv
#15
Louis-Nicolas Veilleux, Vasiliki B Darsaklis, Kathleen Montpetit, Francis H Glorieux, Frank Rauch
Results of previous studies suggest that children and adolescents with osteogenesis imperfecta (OI) type IV have muscle force deficits. However, muscle function remains to be objectively quantified in this population. This study aimed to assess upper and lower extremity muscle function in patients with OI type IV. It was carried out in the outpatient department of a pediatric orthopedic hospital; 27 individuals with OI type IV (7-21 years; 13 males), 27 age- and sex-matched individuals with OI type I, and 27 age- and sex-matched controls...
May 4, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28455562/erratum-to-bone-matrix-maturation-in-a-rat-model-of-intra-cortical-bone-remodeling
#16
Ryan D Ross, D Rick Sumner
No abstract text is available yet for this article.
April 29, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28451713/potential-of-osteoblastic-cells-derived-from-bone-marrow-and-adipose-tissue-associated-with-a-polymer-ceramic-composite-to-repair-bone-tissue
#17
Gileade P Freitas, Helena B Lopes, Adriana L G Almeida, Rodrigo P F Abuna, Rossano Gimenes, Lucas E B Souza, Dimas T Covas, Marcio M Beloti, Adalberto L Rosa
One of the tissue engineering strategies to promote bone regeneration is the association of cells and biomaterials. In this context, the aim of this study was to evaluate if cell source, either from bone marrow or adipose tissue, affects bone repair induced by osteoblastic cells associated with a membrane of poly(vinylidene-trifluoroethylene)/barium titanate (PVDF-TrFE/BT). Mesenchymal stem cells (MSC) were isolated from rat bone marrow and adipose tissue and characterized by detection of several surface markers...
April 27, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28447119/maxillary-sinus-lift-with-beta-tricalcium-phosphate-%C3%AE-tcp-in-edentulous-patients-a-nanotomographic-and-raman-study
#18
Florence Pascaretti-Grizon, Bernard Guillaume, Lisa Terranova, Baptiste Arbez, Hélène Libouban, Daniel Chappard
Sinus lift elevation restores bone mass at the maxilla in edentulate patients before the placement of dental implants. It consists of opening the lateral side of the sinus and grafting beta-tricalcium phosphate granules (β-TCP) under the olfactory membrane. Bone biopsies were obtained in five patients after 60 weeks. They were embedded undecalcified in poly(methyl methacrylate) (pMMA); blocks were analyzed by nanocomputed tomography (nanoCT); specific areas were studied by Raman microspectroscopy. Remnants of β-TCP were osseointegrated and covered with mineralized bone; osteoid tissue was also filling the inner porosity...
April 26, 2017: Calcified Tissue International
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
#19
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
#20
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
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