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https://www.readbyqxmd.com/read/29444405/fullerene-functionalized-monolayer-protected-silver-clusters-ag29-bdt-12-c60-n-3-n-1-9
#1
Papri Chakraborty, Abhijit Nag, Ganesan Paramasivam, Ganapati Natarajan, Thalappil Pradeep
We report the formation of supramolecular adducts between monolayer-protected noble metal nanoclusters and fullerenes, specifically focussing on a well-known silver cluster, [Ag29(BDT)12]3-, where BDT is 1,3-benzene dithiol. We demonstrate that C60 molecules link with the cluster at specific locations and protect the fragile cluster core, enhancing the stability of the cluster. A combination of studies including UV-vis, high-resolution electrospray ionization mass spectrometry (ESI MS), collision-induced dissociation (CID), and nuclear magnetic resonance (NMR) spectroscopy revealed structural details of the fullerene-functionalized clusters, [Ag29(BDT)12(C60)n]3- (n=1-9)...
February 14, 2018: ACS Nano
https://www.readbyqxmd.com/read/29444341/high-fat-diet-induced-obesity-promotes-expansion-of-bone-marrow-adipose-tissue-and-impairs-skeletal-stem-cell-functions-in-mice
#2
Michaela Tencerova, Florence Figeac, Nicholas Ditzel, Hanna Taipaleenmäki, Tina Kamilla Nielsen, Moustapha Kassem
Obesity represents a risk factor for development of insulin resistance and Type 2 Diabetes. In addition, it has been associated with increased adipocyte formation in the bone marrow (BM) along with increased risk for bone fragility fractures. However, little is known on the cellular mechanisms that link obesity, BM adiposity and bone fragility. Thus, in an obesity intervention study in C57BL/6J mice fed with high fat diet (HFD) for 12 weeks, we investigated the molecular and cellular phenotype of bone marrow adipose tissue (BMAT), BM progenitor cells and BM microenvironment in comparison to peripheral adipose tissue (AT)...
February 14, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29442623/structural-characterization-and-analysis-of-human-immunodeficiency-virus-encapsulating-quantum-dots
#3
Wen Yin, Wei Li, Qin Li, Chong Qin, Zhiping Zhang, Xiaowei Zhang, Xian-En Zhang, Zongqiang Cui
Virus internal labeling by inorganic nanoparticle is a suitable technique for single virus imaging. However, it is unknown that the effect of the internal inorganic nanoparticle on morphology and structure of viral core in mature enveloped Human immunodeficiency virus 1 (HIV-1). Also, the analysis of intact HIV-1 particles and virus-inorganic nanoparticle hybrids is almost impossible with conventional negative staining because HIV-1 is inherently fragile and unstable. Herein, we carried out morphological and structural analysis of a newly constructed quantum dot (QD)-encapsulated infectious HIV-1 particle by using an optimized procedure for the electron microscopic analysis of negatively stained HIV-1 particles...
July 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442007/development-and-analytical-characterization-of-a-new-antiparasitic-fenbendazole-compound-tablet-and-pharmacokinetic-investigations-after-its-oral-administration-to-dogs
#4
Cunchun Dai, Shaoqi Qu, Ruili Zhang, Li Zhao, Yuwen Li, Jiajia Zhu, Chunmei Wang, Hui Guo, Zhihui Hao
The objective of this study was to prepare a new compound fenbendazole tablet containing 29.7 % fenbendazole, 1.50 % praziquantel and 0.059 % ivermectin for oral administration. The tablets were successfully prepared using mannitol as filler agent, polyvinyl polypyrrolidone as disintegrant, 5 % povidone (PVAK30) as a binder agent and magnesium stearate as lubricant. The appearance, hardness, fragility, time limit of disintegration and fenbendazole dissolution at 45 min all met the technical standards of the Ministry of Agriculture for the People's Republic of China...
February 1, 2018: Die Pharmazie
https://www.readbyqxmd.com/read/29441424/selective-serotonin-reuptake-inhibitors-ssris-and-markers-of-bone-turnover-in-men
#5
Lana J Williams, Michael Berk, Jason M Hodge, Mark A Kotowicz, Amanda L Stuart, Vinoomika Chandrasekaran, Jasmine Cleminson, Julie A Pasco
Selective serotonin reuptake inhibitors (SSRIs) have been shown to have a clinically significant impact on bone metabolism. To explore this further, we aimed to determine whether these agents are associated with serum markers of bone turnover utilising a population-based sample of men (n = 1138; 20-96 year) participating in the Geelong Osteoporosis Study. Blood samples were obtained and the bone resorption marker, C-telopeptide (CTx) and formation marker, type 1 procollagen amino-terminal-propeptide (PINP) were measured...
February 13, 2018: Calcified Tissue International
https://www.readbyqxmd.com/read/29440516/cultural-transmission-in-an-ever-changing-world-trial-and-error-copying-may-be-more-robust-than-precise-imitation
#6
REVIEW
Noa Truskanov, Yosef Prat
Cultural transmission facilitates the spread of behaviours within social groups and may lead to the establishment of stable traditions in both human and non-human animals. The fidelity of transmission is frequently emphasized as a core component of cultural evolution and as a prerequisite for cumulative culture. Fidelity is often considered a synonym of precise copying of observed behaviours. However, while precise copying guarantees reliable transmission in an ideal static world, it may be vulnerable to realistic variability in the actual environment...
April 5, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29440373/calcium-supplementation-in-osteoporosis-useful-or-harmful
#7
Iacopo Chiodini, Mark J Bolland
Osteoporosis and fragility fractures are important social and economic problems worldwide and are due to both the loss of bone mineral density and sarcopenia. Indeed, fragility fractures are associated with increased disability, morbidity and mortality. It is known that a normal calcium balance together with a normal vitamin D status is important for maintaining well-balanced bone metabolism and for many years calcium and vitamin D has been considered crucial in the prevention and treatment of osteoporosis...
February 12, 2018: European Journal of Endocrinology
https://www.readbyqxmd.com/read/29440190/a-model-linking-sickle-cell-hemoglobinopathies-and-smarcb1-loss-in-renal-medullary-carcinoma
#8
Pavlos Msaouel, Nizar M Tannir, Cheryl Lyn Walker
Renal medullary carcinoma (RMC) is a highly aggressive malignancy that predominantly afflicts young adults and adolescents with sickle hemoglobinopathies. It is characterized by complete loss of expression of the chromatin remodeler and tumor suppressor SMARCB1. Despite therapy, the outcomes of patients with RMC remain very poor, highlighting the need to understand the etiology of this cancer, and develop new diagnostic, preventive, and therapeutic strategies. A key knowledge gap in RMC biology is why sickle hemoglobinopathies predispose to the development of this cancer...
February 12, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29439771/osteoporotic-pelvic-fractures
#9
Ludwig Oberkircher, Steffen Ruchholtz, Pol Maria Rommens, Alexander Hofmann, Benjamin Bücking, Antonio Krüger
BACKGROUND: The estimated incidence of osteoporotic pelvic fractures among persons over age 60 in Germany is 224 per 100 000 persons per year, and rising. A number of surgical treatment options are available, but clinical long-term data are lacking. METHODS: This review is based on pertinent publications and guidelines retrieved by a selective literature search, and on the authors' clinical experience. RESULTS: Patients often report one or more relatively trivial traumatic incidents leading up to the fracture...
February 2, 2018: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/29439476/virus-like-vaccines-against-hiv
#10
REVIEW
Anne-Marie C Andersson, Melanie Schwerdtfeger, Peter J Holst
Protection against chronic infections has necessitated the development of ever-more potent vaccination tools. HIV seems to be the most challenging foe, with a remarkable, poorly immunogenic and fragile surface glycoprotein and the ability to overpower the cell immune system. Virus-like-particle (VLP) vaccines have emerged as potent inducers of antibody and helper T cell responses, while replication-deficient viral vectors have yielded potent cytotoxic T cell responses. Here, we review the emerging concept of merging these two technologies into virus-like-vaccines (VLVs) for the targeting of HIV...
February 11, 2018: Vaccines
https://www.readbyqxmd.com/read/29438659/what-factors-are-associated-with-the-recovery-of-autonomy-after-a-hip-fracture-a-prospective-multicentric-cohort-study
#11
Mattia Morri, Paolo Chiari, Cristiana Forni, Antonella Orlandi Magli, Domenica Gazineo, Natalia Franchini, Lorenzo Marconato, Tiziana Giamboi, Andrea Cotti
OBJECTIVE: to identify the factors associated with recovering autonomy in the activities of daily living DESIGN: A prospective cohort study SETTING: The orthopedic and orthogeriatric departments of 2 regional hospitals PARTICIPANTS: Patients 65 years of age or older with a diagnosis of fragility hip fracture. There were 840 eligible patients. Forty-three patients were excluded and 55 were lost. Seven hundred and forty-two consecutive patients was enrolled at the time of hospitalization and 727 at follow-up...
February 10, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29435927/gene-silencing-in-vitro-and-in-vivo-using-intronic-micrornas
#12
Shi-Lung Lin, Shao-Yao Ying
MicroRNAs (miRNAs), small single-stranded regulatory RNAs capable of interfering with intracellular messenger RNAs (mRNAs) that contain either complete or partial complementarity, are useful for the design of new therapies against cancer polymorphism and viral mutation. Numerous miRNAs have been reported to induce RNA interference (RNAi), a post-transcriptional gene-silencing mechanism. Recent evidence also indicates that they are involved in the transcriptional regulation of genome activities. They were first discovered in Caenorhabditis elegans as native RNA fragments that modulate a wide range of genetic regulatory pathways during embryonic development, and are now recognized as small gene silencers transcribed from the noncoding regions of a genome...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29434897/folate-deficiency-and-aberrant-dna-methylation-and-expression-of-fhit-gene-were-associated-with-cervical-pathogenesis
#13
Qiaoling Li, Ling Ding, Nan Jing, Chunliang Liu, Zuokai Yang, Fang Chen, Lifang Hou, Jintao Wang
Aberrant DNA methylation is a recognized feature in various types of human cancer, and folate has a vital role in the epigenetics of mammalian cells by supplying methyl groups for DNA methylation reactions. Fragile histidine triad (FHIT) is a tumor suppressor gene that is frequently silenced in cervical cancer (CC) and preneoplastic lesions. Promoter hypermethylation was previously observed in CC, and its epigenetic silencing has been observed at mRNA or protein levels. Changes in folate intake to modulate DNA methylation may be a mechanistic link to cancer, but this remains to be elucidated...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434631/transcatheter-aortic-valve-replacement-and-stroke-a-comprehensive-review
#14
REVIEW
Periklis A Davlouros, Virginia C Mplani, Ioanna Koniari, Grigorios Tsigkas, George Hahalis
Transcatheter aortic valve implantation (TAVR) has emerged as an alternative, rapidly evolving treatment option for patients with severe aortic stenosis and high surgical risk. Stroke is a devastating complication being confined mainly in the periprocedural and 30-day period following TAVR, with a lower and relatively constant frequency thereafter. Early stroke is mainly due to debris embolization during the procedure, whereas later events are associated with patient specific factors. Despite the fact that the rate of clinical stroke has been constantly decreasing compared to initial TAVR experience, modern neuro-imaging with MRI suggests that new ischemic lesions post-TAVR are almost universal...
January 2018: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/29431298/radiographic-measurements-following-surgery-for-distal-radius-fractures-in-an-israeli-population
#15
Alan Katz, Amanda Almakias, Ronit Wollstein
BACKGROUND: Fractures of the distal radius are the most common fractures in the upper extremity, and their incidence is increasing with the aging of the population. Despite anatomical reduction of the bones, many patients complain of residual pain. A reason for this may be ligament injury not addressed during surgery or conservative treatment. Radiographic measurements may allow assessment of ligament integrity but they may be population specific and differ among races. OBJECTIVES: To assess radiographic wrist measurements in an Israeli population and to compare them to existing values...
February 2018: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/29430846/low-grip-strength-is-a-strong-risk-factor-of-osteoporosis-in-postmenopausal-women
#16
Yi-Zhong Li, Hua-Feng Zhuang, Si-Qing Cai, Chang-Kun Lin, Pei-Wen Wang, Li-Sheng Yan, Jin-Kuang Lin, Hai-Ming Yu
OBJECTIVE: To investigate the effect of grip strength on bone mineral density (BMD) in postmenopausal women. Low BMD is related to risk of fracture and falling is the strongest factor for fragility fractures. Handgrip strength is a reliable indicator of muscle strength and muscle strength is associated with falling. METHODS: For the present study 120 women were divided into two groups: those ≤65 years and those >65 years. Serum 25 hydroxyvitamin D (25OHD), BMD, and handgrip strength were measured to observe the effect of age on 25OHD, grip strength, and BMD, as well as the effect of 25OHD on grip strength and BMD...
February 12, 2018: Orthopaedic Surgery
https://www.readbyqxmd.com/read/29429602/-characteristics-and-health-status-of-homeless-women-born-in-france-and-abroad-results-of-insee-ined-2012-survey
#17
M-E Gomes do Espirito Santo, A-L Perrine, C Bonaldi, I Guseva-Canu
BACKGROUND: French national surveys among the homeless population in 2001 and 2012 provided a general description of the homeless beneficiaries of medical and social aids. However, given the increasing number of women in this population, mostly born abroad and accompanied by their children, a descriptive study of homeless women according to the fact of being born in France or abroad was conducted. METHODS: A probability sample of 1470 French-speaking homeless women was recruited for the Insee-Ined 2012 survey...
February 8, 2018: Revue D'épidémiologie et de Santé Publique
https://www.readbyqxmd.com/read/29429573/loss-of-function-mutations-in-unc45a-cause-a-syndrome-associating-cholestasis-diarrhea-impaired-hearing-and-bone-fragility
#18
Clothilde Esteve, Ludmila Francescatto, Perciliz L Tan, Aurélie Bourchany, Cécile De Leusse, Evelyne Marinier, Arnaud Blanchard, Patrice Bourgeois, Céline Brochier-Armanet, Ange-Line Bruel, Arnauld Delarue, Yannis Duffourd, Emmanuelle Ecochard-Dugelay, Géraldine Hery, Frédéric Huet, Philippe Gauchez, Emmanuel Gonzales, Catherine Guettier-Bouttier, Mina Komuta, Caroline Lacoste, Raphaelle Maudinas, Karin Mazodier, Yves Rimet, Jean-Baptiste Rivière, Bertrand Roquelaure, Sabine Sigaudy, Xavier Stephenne, Christel Thauvin-Robinet, Julien Thevenon, Jacques Sarles, Nicolas Levy, Catherine Badens, Olivier Goulet, Jean-Pierre Hugot, Nicholas Katsanis, Laurence Faivre, Alexandre Fabre
Despite the rapid discovery of genes for rare genetic disorders, we continue to encounter individuals presenting with syndromic manifestations. Here, we have studied four affected people in three families presenting with cholestasis, congenital diarrhea, impaired hearing, and bone fragility. Whole-exome sequencing of all affected individuals and their parents identified biallelic mutations in Unc-45 Myosin Chaperone A (UNC45A) as a likely driver for this disorder. Subsequent in vitro and in vivo functional studies of the candidate gene indicated a loss-of-function paradigm, wherein mutations attenuated or abolished protein activity with concomitant defects in gut development and function...
February 1, 2018: American Journal of Human Genetics
https://www.readbyqxmd.com/read/29428901/fragile-x-mental-retardation-protein-participates-in-non-coding-rna-pathways
#19
En-Hui Li, Xin Zhao, Ce Zhang, Wei Liu
Fragile X syndrome is one of the most common forms of inherited intellectual disability. It is caused by mutations of the Fragile X mental retardation 1(FMR1) gene, resulting in either the loss or abnormal expression of the Fragile X mental retardation protein (FMRP). Recent research showed that FMRP participates in non-coding RNA pathways and plays various important roles in physiology, thereby extending our knowledge of the pathogenesis of the Fragile X syndrome. Initial studies showed that the Drosophila FMRP participates in siRNA and miRNA pathways by interacting with Dicer, Ago1 and Ago2, involved in neural activity and the fate determination of the germline stem cells...
February 20, 2018: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/29426990/what-are-the-predictors-of-clinical-success-after-percutaneous-vertebroplasty-for-osteoporotic-vertebral-fractures
#20
Elsa Denoix, Flore Viry, Agnes Ostertag, Caroline Parlier-Cuau, Jean-Denis Laredo, Martine Cohen-Solal, Valérie Bousson, Thomas Funck-Brentano
OBJECTIVES: Osteoporotic vertebral fractures are responsible for acute pain and disability that may persist for more than 2 months. We wanted to identify predicting factors for mid-term outcome after vertebroplasty. METHODS: We included consecutive patients who underwent vertebroplasty for fragility fractures with persistent and intense pain between January 2014-June 2016. Outcome was assessed by an independent clinician after 1 month using a standardized questionnaire...
February 9, 2018: European Radiology
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