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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
#1
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
#2
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/29322706/osteoporosis-in-postmenopausal-females-with-primary-knee-osteoarthritis-in-a-vitamin-d-deficient-population
#3
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/29322238/development-of-inhibitory-synaptic-inputs-on-layer-2-3-pyramidal-neurons-in-the-rat-medial-prefrontal-cortex
#4
Mari A Virtanen, Claudia Marvine Lacoh, Hubert Fiumelli, Markus Kosel, Shiva Tyagarajan, Mathias de Roo, Laszlo Vutskits
Inhibitory control of pyramidal neurons plays a major role in governing the excitability in the brain. While spatial mapping of inhibitory inputs onto pyramidal neurons would provide important structural data on neuronal signaling, studying their distribution at the single cell level is difficult due to the lack of easily identifiable anatomical proxies. Here, we describe an approach where in utero electroporation of a plasmid encoding for fluorescently tagged gephyrin into the precursors of pyramidal cells along with ionotophoretic injection of Lucifer Yellow can reliably and specifically detect GABAergic synapses on the dendritic arbour of single pyramidal neurons...
January 10, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29321359/association-of-lactase-13910-c-t-polymorphism-with-bone-mineral-density-and-fracture-risk-a-meta-analysis
#5
Yougen Wu, Yinghua Li, Yunqing Cui, Yunjiao Zhou, Qingqing Qian, Yang Hong
A number of studies have investigated the association of lactase (LCT,C/T-13910) gene polymorphismwith bonemineral density (BMD) and fracture risk, but previous results were inconclusive. In this study, a meta-analysis was performed to quantify the association of LCT (C/T-13910) polymorphism with BMD and fracture risk. Eligible publications were searched in the PubMed, Web of Science, Embase databases, Google Scholar, Yahoo and Baidu. Pooled weighed mean difference (WMD) or odds ratio (OR) with their 95% confidence interval (CI) were calculated using a fixed-effects or random-effects model...
December 2017: Journal of Genetics
https://www.readbyqxmd.com/read/29317680/exome-wide-rare-variant-analyses-of-two-bone-mineral-density-phenotypes-the-challenges-of-analyzing-rare-genetic-variation
#6
Jianping Sun, Karim Oualkacha, Vincenzo Forgetta, Hou-Feng Zheng, J Brent Richards, Daniel S Evans, Eric Orwoll, Celia M T Greenwood
Performance of a recently developed test for association between multivariate phenotypes and sets of genetic variants (MURAT) is demonstrated using measures of bone mineral density (BMD). By combining individual-level whole genome sequenced data from the UK10K study, and imputed genome-wide genetic data on individuals from the Study of Osteoporotic Fractures (SOF) and the Osteoporotic Fractures in Men Study (MrOS), a data set of 8810 individuals was assembled; tests of association were performed between autosomal gene-sets of genetic variants and BMD measured at lumbar spine and femoral neck...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29314651/prevalence-and-predictors-of-asymptomatic-vertebral-fractures-in-inflammatory-myositis
#7
Latika Gupta, Able Lawrence, Sukesh Edavalath, Ramnath Misra
AIM: To assess the frequency and risk factors of asymptomatic vertebral fractures in inflammatory myositis. PATIENTS AND METHODS: Dorsal and lumbar spine lateral radiographs were taken for adults with inflammatory myositis and scored using Genant's semi-quantitative technique. Demographic data, weight, height, postmenopausal status, duration of corticosteroid use, drug intake, co-morbidities and past history of fractures were recorded. Bone mineral density (BMD) was assessed using dual-energy X-ray absorptiometry (DEXA)...
January 5, 2018: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/29313118/proton-density-fat-fraction-pdff-mri-for-differentiation-of-benign-and-malignant-vertebral-lesions
#8
Frederic Carsten Schmeel, Julian Alexander Luetkens, Peter Johannes Wagenhäuser, Michael Meier-Schroers, Daniel Lloyd Kuetting, Andreas Feißt, Jürgen Gieseke, Leonard Christopher Schmeel, Frank Träber, Hans Heinz Schild, Guido Matthias Kukuk
OBJECTIVES: To investigate whether proton density fat fraction (PDFF) measurements using a six-echo modified Dixon sequence can help to differentiate between benign and malignant vertebral bone marrow lesions. METHODS: Sixty-six patients were prospectively enrolled in our study. In addition to conventional MRI at 3.0-Tesla including at least sagittal T2-weighted/spectral attenuated inversion recovery and T1-weighted sequences, all patients underwent a sagittal six-echo modified Dixon sequence of the spine...
January 8, 2018: European Radiology
https://www.readbyqxmd.com/read/29313098/decrease-of-bone-mineral-density-in-japanese-patients-with-non-metastatic-prostate-cancer-treated-with-androgen-deprivation-therapy
#9
Seiichi Kato, Makoto Kawase, Daiki Kato, Takashi Ishida, Masahiro Uno, Yoshinori Fujimoto, Takako Masue, Naruyasu Masue, Takashi Deguchi
The aim of this study was to conduct a cross-sectional survey of investigations related to the bone mineral density (BMD) of both non-metastatic prostate cancer (NMPC) patients who have not yet received androgen deprivation therapy (ADT) and patients receiving prolonged ADT in Japan. Japanese male patients with NMPC who received continuous ADT or who were planning to receive ADT were enrolled in this study. Lumbar spine and femoral neck BMD was measured using dual-energy X-ray absorptiometry (DEXA). To assess patient characteristics, we searched medical records and questionnaires to determine whether they had any factors that could possibly affect BMD...
January 8, 2018: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/29311652/adult-generated-neurons-born-during-chronic-social-stress-are-uniquely-adapted-to-respond-to-subsequent-chronic-social-stress
#10
Zurine De Miguel, Ursula Haditsch, Theo D Palmer, Arantza Azpiroz, Robert M Sapolsky
Chronic stress is a recognized risk factor for psychiatric and psychological disorders and a potent modulator of adult neurogenesis. Numerous studies have shown that during stress, neurogenesis decreases; however, during the recovery from the stress, neurogenesis increases. Despite the increased number of neurons born after stress, it is unknown if the function and morphology of those neurons are altered. Here we asked whether neurons in adult mice, born during the final 5 days of chronic social stress and matured during recovery from chronic social stress, are similar to neurons born with no stress conditions from a quantitative, functional and morphological perspective, and whether those neurons are uniquely adapted to respond to a subsequent stressful challenge...
January 8, 2018: Molecular Psychiatry
https://www.readbyqxmd.com/read/29310418/improvements-in-osteoporosis-testing-and-care-are-found-following-the-wide-scale-implementation-of-the-ontario-fracture-clinic-screening-program-an-interrupted-time-series-analysis
#11
Dorcas E Beaton, Muhammad Mamdani, Hong Zheng, Susan Jaglal, Suzanne M Cadarette, Earl R Bogoch, Joanna E M Sale, Rebeka Sujic, Ravi Jain
We evaluated a system-wide impact of a health intervention to improve treatment of osteoporosis after a fragility fracture. The intervention consisted of assigning a screening coordinator to selected fracture clinics to identify, educate, and follow up with fragility fracture patients and inform their physicians of the need to evaluate bone health. Thirty-seven hospitals in the province of Ontario (Canada) were assigned a screening coordinator. Twenty-three similar hospitals were control sites. All hospitals had orthopedic services and handled moderate-to-higher volumes of fracture patients...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29305734/olipudase-alfa-for-treatment-of-acid-sphingomyelinase-deficiency-asmd-safety-and-efficacy-in-adults-treated-for-30-months
#12
Melissa P Wasserstein, George A Diaz, Robin H Lachmann, Marie-Hélène Jouvin, Indrani Nandy, Allena J Ji, Ana Cristina Puga
Olipudase alfa, a recombinant human acid sphingomyelinase (ASM), is an enzyme replacement therapy for the treatment of nonneurologic manifestations of acid sphingomyelinase deficiency (ASMD). This ongoing, open-label, long-term study (NCT02004704) assessed safety and efficacy of olipudase alfa following 30 months of treatment in five adult patients with ASMD. There were no deaths, serious or severe events, or discontinuations during 30 months of treatment. The majority of adverse events were mild and included headache, nausea, and abdominal pain...
January 5, 2018: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/29304378/life-course-genome-wide-association-study-meta-analysis-of-total-body-bmd-and-assessment-of-age-specific-effects
#13
Carolina Medina-Gomez, John P Kemp, Katerina Trajanoska, Jian'an Luan, Alessandra Chesi, Tarunveer S Ahluwalia, Dennis O Mook-Kanamori, Annelies Ham, Fernando P Hartwig, Daniel S Evans, Raimo Joro, Ivana Nedeljkovic, Hou-Feng Zheng, Kun Zhu, Mustafa Atalay, Ching-Ti Liu, Maria Nethander, Linda Broer, Gudmar Porleifsson, Benjamin H Mullin, Samuel K Handelman, Mike A Nalls, Leon E Jessen, Denise H M Heppe, J Brent Richards, Carol Wang, Bo Chawes, Katharina E Schraut, Najaf Amin, Nick Wareham, David Karasik, Nathalie Van der Velde, M Arfan Ikram, Babette S Zemel, Yanhua Zhou, Christian J Carlsson, Yongmei Liu, Fiona E McGuigan, Cindy G Boer, Klaus Bønnelykke, Stuart H Ralston, John A Robbins, John P Walsh, M Carola Zillikens, Claudia Langenberg, Ruifang Li-Gao, Frances M K Williams, Tamara B Harris, Kristina Akesson, Rebecca D Jackson, Gunnar Sigurdsson, Martin den Heijer, Bram C J van der Eerden, Jeroen van de Peppel, Timothy D Spector, Craig Pennell, Bernardo L Horta, Janine F Felix, Jing Hua Zhao, Scott G Wilson, Renée de Mutsert, Hans Bisgaard, Unnur Styrkársdóttir, Vincent W Jaddoe, Eric Orwoll, Timo A Lakka, Robert Scott, Struan F A Grant, Mattias Lorentzon, Cornelia M van Duijn, James F Wilson, Kari Stefansson, Bruce M Psaty, Douglas P Kiel, Claes Ohlsson, Evangelia Ntzani, Andre J van Wijnen, Vincenzo Forgetta, Mohsen Ghanbari, John G Logan, Graham R Williams, J H Duncan Bassett, Peter I Croucher, Evangelos Evangelou, Andre G Uitterlinden, Cheryl L Ackert-Bicknell, Jonathan H Tobias, David M Evans, Fernando Rivadeneira
Bone mineral density (BMD) assessed by DXA is used to evaluate bone health. In children, total body (TB) measurements are commonly used; in older individuals, BMD at the lumbar spine (LS) and femoral neck (FN) is used to diagnose osteoporosis. To date, genetic variants in more than 60 loci have been identified as associated with BMD. To investigate the genetic determinants of TB-BMD variation along the life course and test for age-specific effects, we performed a meta-analysis of 30 genome-wide association studies (GWASs) of TB-BMD including 66,628 individuals overall and divided across five age strata, each spanning 15 years...
January 4, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29304151/the-role-of-carboxy-terminal-cross-linking-telopeptide-of-type-i-collagen-dual-x-ray-absorptiometry-bone-strain-and-romberg-test-in-a-new-osteoporotic-fracture-risk-evaluation-a-proposal-from-an-observational-study
#14
Fabio M Ulivieri, Luca P Piodi, Enzo Grossi, Luca Rinaudo, Carmelo Messina, Anna P Tassi, Marcello Filopanti, Anna Tirelli, Francesco Sardanelli
The consolidated way of diagnosing and treating osteoporosis in order to prevent fragility fractures has recently been questioned by some papers, which complained of overdiagnosis and consequent overtreatment of this pathology with underestimating other causes of the fragility fractures, like falls. A new clinical approach is proposed for identifying the subgroup of patients prone to fragility fractures. This retrospective observational study was conducted from January to June 2015 at the Nuclear Medicine-Bone Metabolic Unit of the of the Fondazione IRCCS Ca' Granda, Milan, Italy...
2018: PloS One
https://www.readbyqxmd.com/read/29304057/long-chain-omega-3-polyunsaturated-fatty-acid-dietary-intake-is-positively-associated-with-bone-mineral-density-in-normal-and-osteopenic-spanish-women
#15
Jesus Lavado-García, Raul Roncero-Martin, Jose M Moran, Maria Pedrera-Canal, Ignacio Aliaga, Olga Leal-Hernandez, Sergio Rico-Martin, Maria L Canal-Macias
The regular consumption of long-chain omega-3 polyunsaturated fatty acids (LCO3-PUFAs) results in general health benefits. The intake of LCO3-PUFAs has been reported to contribute to bone metabolism. We aimed to investigate the relationships between dietary intakes of LCO3-PUFAs and bone mineral density (BMD) in Spanish women aged 20-79 years old. A total of 1865 female subjects (20-79 years old) were enrolled, and lumbar (L2, L3, L3 and total spine), hip (femoral neck (FN), femoral trochanter (FT) and Ward's triangle (WT)) bone mineral density (BMD) were measured by dual energy X-ray absorptiometry (DXA)...
2018: PloS One
https://www.readbyqxmd.com/read/29302779/glia-to-neuron-transfer-of-mirnas-via-extracellular-vesicles-a-new-mechanism-underlying-inflammation-induced-synaptic-alterations
#16
Ilaria Prada, Martina Gabrielli, Elena Turola, Alessia Iorio, Giulia D'Arrigo, Roberta Parolisi, Mariacristina De Luca, Marco Pacifici, Mattia Bastoni, Marta Lombardi, Giuseppe Legname, Dan Cojoc, Annalisa Buffo, Roberto Furlan, Francesca Peruzzi, Claudia Verderio
Recent evidence indicates synaptic dysfunction as an early mechanism affected in neuroinflammatory diseases, such as multiple sclerosis, which are characterized by chronic microglia activation. However, the mode(s) of action of reactive microglia in causing synaptic defects are not fully understood. In this study, we show that inflammatory microglia produce extracellular vesicles (EVs) which are enriched in a set of miRNAs that regulate the expression of key synaptic proteins. Among them, miR-146a-5p, a microglia-specific miRNA not present in hippocampal neurons, controls the expression of presynaptic synaptotagmin1 (Syt1) and postsynaptic neuroligin1 (Nlg1), an adhesion protein which play a crucial role in dendritic spine formation and synaptic stability...
January 4, 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29302702/furin-promotes-dendritic-morphogenesis-and-learning-and-memory-in-transgenic-mice
#17
Binglin Zhu, Lige Zhao, Dong Luo, Demei Xu, Tao Tan, Zhifang Dong, Ying Tang, Zhuo Min, Xiaojuan Deng, Fei Sun, Zhen Yan, Guojun Chen
Furin is a proprotein convertase implicated in a variety of pathological processes including neurodegenerative diseases. However, the role of furin in neuronal plasticity and learning and memory remains to be elucidated. Here, we report that in brain-specific furin transgenic (Furin-Tg) mice, the dendritic spine density and proliferation of neural progenitor cells were significantly increased. These mice exhibited enhanced long-term potentiation (LTP) and spatial learning and memory performance, without alterations of miniature excitatory/inhibitory postsynaptic currents...
January 4, 2018: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29302265/the-effect-of-low-dose-intravenous-bisphosphonate-treatment-on-osteoporosis-in-children-with-quadriplegic-cerebral-palsy
#18
Soon Jeong Moon, Young Min An, Soon Ki Kim, Young Se Kwon, Ji Eun Lee
Purpose: Quadriplegic children with cerebral palsy are more susceptible to osteoporosis because of various risk factors that interfere with bone metabolism. Pamidronate is effective for pediatric osteoporosis, but there are no guidelines for optimal dosage or duration of treatment in quadriplegic children with osteoporosis. We aimed to evaluate the efficacy of low-dose pamidronate treatment in these patients. Methods: Ten quadriplegic patients on antiepileptic drugs (6 male, 4 female patients; mean age, 10...
December 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29297151/liver-x-receptor-agonist-gw3965-regulates-synaptic-function-upon-amyloid-beta-exposure-in-hippocampal-neurons
#19
C Báez-Becerra, F Filipello, A Sandoval-Hernández, H Arboleda, G Arboleda
Alzheimer's disease (AD) is a devastating neurodegenerative disease characterized by beta-amyloid (Aβ) accumulation and neurofibrillary tangles formation in the brain which are associated to synaptic deficits and dementia. Liver X receptor (LXR) agonists have been demonstrated to revert of pathologic and cognitive defects in murine models of AD through the regulation of Apolipoprotein E, ATP-Binding Cassette A1 (ABCA1), by dampening neuroinflammation and also by reducing the levels of amyloid-β (Aβ) accumulation in the brain...
January 3, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29296931/bone-disease-in-monoclonal-gammopathy-of-undetermined-significance-results-from-a-screened-population-based-study
#20
Sigrun Thorsteinsdottir, Sigrun H Lund, Ebba K Lindqvist, Marianna Thordardottir, Gunnar Sigurdsson, Rene Costello, Debra Burton, Hlif Steingrimsdottir, Vilmundur Gudnason, Gudny Eiriksdottir, Kristin Siggeirsdottir, Tamara B Harris, Ola Landgren, Sigurdur Y Kristinsson
Previous studies have shown that individuals with monoclonal gammopathy of undetermined significance (MGUS) have an increased risk of fractures, although the underlying mechanisms remain unknown. Our aim was to analyze bone mineral density (BMD), bone volume, and risk of fractures among individuals with MGUS. We performed a screening using the Age, Gene/Environment Susceptibility (AGES)-Reykjavik Study cohort, consisting of 5764 elderly individuals, identifying 300 individuals with MGUS, and 275 with light-chain MGUS...
December 26, 2017: Blood Advances
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