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https://www.readbyqxmd.com/read/27923060/the-limitations-of-model-based-experimental-design-and-parameter-estimation-in-sloppy-systems
#1
Andrew White, Malachi Tolman, Howard D Thames, Hubert Rodney Withers, Kathy A Mason, Mark K Transtrum
We explore the relationship among experimental design, parameter estimation, and systematic error in sloppy models. We show that the approximate nature of mathematical models poses challenges for experimental design in sloppy models. In many models of complex biological processes it is unknown what are the relevant physical mechanisms that must be included to explain system behaviors. As a consequence, models are often overly complex, with many practically unidentifiable parameters. Furthermore, which mechanisms are relevant/irrelevant vary among experiments...
December 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27923057/the-effect-of-iron-fortification-on-iron-fe-status-and-inflammation-a-randomized-controlled-trial
#2
Jingqiu Ma, Qianqian Sun, Jinrong Liu, Yanqi Hu, Shanshan Liu, Jie Zhang, Xiaoyang Sheng, K Michael Hambidge
BACKGROUND: Iron deficiency (ID) is common in toddlers in developing countries. Iron fortified or meat-based complementary foods may be effective to prevent ID. OBJECTIVE: Our objective was to compare iron status at 18 months and growth from 6 to 18 months in rural poor toddlers fed 3 different complementary foods. METHODS: The study was nested within a larger trial in which 6-month-old infants were randomized to receive 50g/d meat (MG), an equi-caloric fortified cereal supplement (FG) or local cereal supplement (LG) for 1 year...
2016: PloS One
https://www.readbyqxmd.com/read/27922887/regional-cerebral-abnormalities-measured-by-frequency-domain-near-infrared-spectroscopy-in-pediatric-patients-during-extracorporeal-membrane-oxygenation
#3
Fenghua Tian, Christopher Jenks, Donald Potter, Darryl Miles, Lakshmi Raman
Extracorporeal membrane oxygenation (ECMO) is a form of advanced cardio-respiratory support provided to critically ill patients with severe respiratory and/or cardiovascular failure. While children undergoing ECMO therapy have significant risk for neurological morbidity, currently there is a lack of reliable bedside tool to detect the neurologic events for patients on ECMO. This study assessed the feasibility of frequency-domain near-infrared spectroscopy (NIRS) for detection of intracranial complications during ECMO therapy...
December 2, 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/27922865/additional-value-of-early-phase-18f-fp-cit-pet-image-for-differential-diagnosis-of-atypical-parkinsonism
#4
Soyoung Jin, Minyoung Oh, Seung Jun Oh, Jungsu S Oh, Sang Ju Lee, Sun Ju Chung, Jae Seung Kim
PURPOSE: Regional cerebral perfusion is coupled to metabolism in general. Early perfusion dominant imaging using F-FP-CIT PET (pCIT) may provide complementary information to delayed dopamine transporter dominant images. We investigated the ability of pCIT to differentiate atypical Parkinson disorder from Parkinson disease (PD) compared to FDG and the image quality for optimizing the acquisition time. METHODS: Sixty-seven subjects [PD, 23 subjects; multiple system atrophy-cerebellar type (MSA-C), 27 subjects; MSA-Parkinson type (MSA-P), 12 subjects; and progressive supranuclear palsy (PSP), 5 subjects] underwent F-FP-CIT and FDG PET...
December 3, 2016: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/27922552/novel-use-of-all-trans-retinoic-acid-in-a-model-of-lipopolysaccharide-immunosuppression-to-decrease-the-generation-of-myeloid-derived-suppressor-cells-by-reducing-the-proliferation-of-cd34-precursor-cells
#5
Daiana Martire-Greco, Nahuel Rodriguez-Rodrigues, Luis A Castillo, María Belén Vecchione, Marcelo de Campos-Nebel, Marlina Córdoba Moreno, Roberto Meiss, Mónica Vermeulen, Veronica I Landoni, Gabriela C Fernandez
All-trans-Retinoic Acid (ATRA) is a derivative of vitamin A with anti-proliferative properties. Endotoxin shock and subsequent immunosuppression (IS) by lipopolysaccharide (LPS) stimulates myelopoiesis with expansion of myeloid-derived suppressor cells (MDSC). Since we have previously shown that ATRA reverses the IS state by decreasing functional MDSC, our aim was to investigate if ATRA was able to modulate MDSC generation by regulating myelopoiesis in murine hematopoietic organs. We found that ATRA administration in vivo and in vitro decreased the number of CD34+ precursor cells that were increased in IS mice...
November 25, 2016: Shock
https://www.readbyqxmd.com/read/27922341/an-exploration-of-complementary-feeding-of-infants-and-young-children-in-the-rural-area-of-muhoroni-nyanza-province-kenya-a-descriptive-study
#6
Sophie Harvey, Jo Callaby, Lesley Roberts
BACKGROUND: Inappropriate infant and young child feeding practices contribute to malnutrition, infection and long-term development limitation. AIMS: To explore complementary feeding and food safety in Muhoroni District, Nyanza Province in rural Kenya. OBJECTIVES: To compare practices with the Infant and Young Child Feeding (IYCF) guidelines, and identify associations with inappropriate practices. METHODS: Between January and April 2014, a questionnaire completed by primary caregivers of children aged 6-23 months asked about foods the child had received in the previous 24 hours, the introduction of complementary foods, and the food hygiene practices undertaken by the caregiver...
December 6, 2016: Paediatrics and International Child Health
https://www.readbyqxmd.com/read/27922230/consensus-statement-on-diagnosis-treatment-and-follow-up-of-cow-s-milk-protein-allergy-among-infants-and-children-in-turkey
#7
Aydan Kansu, Aysel Yüce, Buket Dalgıç, Bülent Enis Şekerel, Fügen Çullu-Çokuğraş, Haluk Çokuğraş
The present paper aims to provide experts' consensus on diagnosis and management of cow's milk protein allergy (CMPA) among infants and children in Turkey, based on review of available evidence-based guidelines, publications and experts' clinical experience. The experts agreed that CMPA diagnosis should be based on symptomatic evaluation and diagnostic elimination diet as followed by implementation of an open challenge test after disappearance of symptoms and confirmation of CMPA diagnosis in re-appearance of symptoms...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27922112/plasma-cathepsin-d-correlates-with-histological-classifications-of-fatty-liver-disease-in-adults-and-responds-to-intervention
#8
Sofie M A Walenbergh, Tom Houben, Sander S Rensen, Veerle Bieghs, Tim Hendrikx, Patrick J van Gorp, Yvonne Oligschlaeger, Mike L J Jeurissen, Marion J J Gijbels, Wim A Buurman, Anita C E Vreugdenhil, Jan Willem M Greve, Jogchum Plat, Marten H Hofker, Satish Kalhan, Jussi Pihlajamäki, Patrick Lindsey, Ger H Koek, Ronit Shiri-Sverdlov
Non-alcoholic steatohepatitis (NASH) is characterized by liver lipid accumulation and inflammation. The mechanisms that trigger hepatic inflammation are poorly understood and subsequently, no specific non-invasive markers exist. We previously demonstrated a reduction in the plasma lysosomal enzyme, cathepsin D (CatD), in children with NASH compared to children without NASH. Recent studies have raised the concept that non-alcoholic fatty liver disease (NAFLD) in adults is distinct from children due to a different histological pattern in the liver...
December 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921323/the-application-of-strand-invasion-phenomenon-directed-by-peptide-nucleic-acid-pna-and-single-stranded-dna-binding-protein-ssb-for-the-recognition-of-specific-sequences-of-human-endogenous-retroviral-herv-w-family
#9
Grzegorz Machnik, Łukasz Bułdak, Jarosław Ruczyński, Tomasz Gąsior, Małgorzata Huzarska, Dariusz Belowski, Magdalena Alenowicz, Piotr Mucha, Piotr Rekowski, Bogusław Okopień
The HERV-W family of human endogenous retroviruses represents a group of numerous sequences that show close similarity in genetic composition. It has been documented that some members of HERV-W-derived expression products are supposed to play significant role in humans' pathology, such as multiple sclerosis or schizophrenia. Other members of the family are necessary to orchestrate physiological processes (eg, ERVWE1 coding syncytin-1 that is engaged in syncytiotrophoblast formation). Therefore, an assay that would allow the recognition of particular form of HERV-W members is highly desirable...
December 6, 2016: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/27921195/new-developments-in-the-pharmacodynamics-and-pharmacokinetics-of-combination-of-chinese-medicine-and-western-medicine
#10
REVIEW
Di Liu, Xiao-Chun Liang
It is very common to use Chinese medicine (CM) combined with Western medicine (WM) in clinical practice. The appropriate combination of CM with WM can reduce toxicity and enhance effects in order to make the best use of advantages and bypass the disadvantages. However, an inappropriate combination can not only affect the curative effect but even cause death. Therefore, strengthening the complementary advantages of the CM and WM to improve the therapeutic efficacy and reduce side effects has become an important research topic of clinical medicine and pharmacy...
December 5, 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/27921171/computed-tomography-and-magnetic-resonance-fusion-imaging-in-cholesteatoma-preoperative-assessment
#11
Agustín Campos, Federico Mata, Rosa Reboll, María Luisa Peris, Jorge Basterra
The purpose of this study is to describe a method for developing fusion imaging for the preoperative evaluation of cholesteatoma. In 33 patients diagnosed with cholesteatoma, a high-resolution temporal bone computed tomography (CT) scan without intravenous contrast and propeller diffusion-weighted magnetic resonance imaging (MRI) were performed. Both studies were then sent to the BrainLAB work station, where the images were fused to obtain a morphological and color map. Intraoperative findings coincided with fusion CT-MRI imaging in all but two patients...
December 5, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27921115/-speech-audiometry-for-indication-of-conventional-and-implantable-hearing-aids
#12
U Hoppe, A Hast
The social function of the human hearing apparatus is comprehension of speech. Auditory rehabilitation aims to enhance speech perception in everyday life. Consequently, audiological evaluation contains speech perception measurement. Many speech audiometric methods have been developed in German-speaking countries, which are suitable for quantification of speech perception abilities in quiet and in noise to address specific diagnostic questions. For establishment of the indication for technical hearing systems such as hearing aids and cochlear implants, the Freiburg monosyllabic test has been employed successfully for many years...
December 5, 2016: HNO
https://www.readbyqxmd.com/read/27921083/integrated-role-of-bifidobacterium-animalis-subsp-lactis-supplementation-in-gut-microbiota-immunity-and-metabolism-of-infant-rhesus-monkeys
#13
Xuan He, Carolyn M Slupsky, James W Dekker, Neill W Haggarty, Bo Lönnerdal
To investigate the impact of probiotic supplementation of infant formula on immune parameters, intestinal microbiota, and metabolism, five individually housed infant rhesus monkeys exclusively fed standard infant formula supplemented with probiotics (Bifidobacterium animalis subsp. lactis HN019) from birth until 3 months of age were compared with five standard formula-fed and five breast-fed monkeys. Anthropometric measurements, serum insulin, immune parameters, fecal microbiota, and metabolic profiles of serum, urine, and feces were evaluated...
November 2016: MSystems
https://www.readbyqxmd.com/read/27920613/core-and-complementary-chiropractic-lowering-barriers-to-patient-utilization-of-services
#14
John J Triano, Marion McGregor
OBJECTIVE: The use of chiropractic services has stalled while interest in accessing manipulation services is rising. The purpose of this paper is to consider this dilemma in the context of the dynamics of professional socialization, surveys of public attitudes, and a potential strategic action. DISCUSSION: This is a reflection work grounded in the literature on professional socialization and the attitudes held regarding chiropractic in modern society, to include its members, and in original data on training programs...
December 2016: Journal of Chiropractic Humanities
https://www.readbyqxmd.com/read/27920201/the-streptococcus-gordonii-adhesin-csha-binds-host-fibronectin-via-a-catch-clamp-mechanism
#15
Catherine R Back, Maryta N Sztukowska, Marisa Till, Richard J Lamont, Howard F Jenkinson, Angela H Nobbs, Paul R Race
Adherence of bacteria to biotic or abiotic surfaces is a prerequisite for host colonization and represents an important step in microbial pathogenicity. This attachment is facilitated by bacterial adhesins at the cell surface. Due to their size and often elaborate multi-domain architectures, these polypeptides represent challenging targets for detailed structural and functional characterization. The multifunctional fibrillar adhesin CshA, which mediates binding to both host molecules and other microorganisms, is an important determinant of colonisation by Streptococcus gordonii, an oral commensal and opportunistic pathogen of animals and humans...
December 5, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27919801/folic-acid-capped-pegylated-magnetic-nanoparticles-enter-cancer-cells-mostly-via-clathrin-dependent-endocytosis
#16
Emilie Allard-Vannier, Katel Hervé-Aubert, Karine Kaaki, Thibaut Blondy, Anastasia Shebanova, Konstantin V Shaitan, Anastasia A Ignatova, Marie-Louise Saboungi, Alexey V Feofanov, Igor Chourpa
BACKGROUND: This work is focused on mechanisms of uptake in cancer cells of rationally designed, covalently assembled nanoparticles, made of superparamagnetic iron oxide nanoparticles (SPIONs), fluorophores (doxorubicin or Nile Blue), polyethylene glycol (PEG) and folic acid (FA), referred hereinafter as SFP-FA. METHODS: SFP-FA were characterized by DLS, zetametry and fluorescence spectroscopy. The SFP-FA uptake in cancer cells was monitored using fluorescence-based methods like fluorescence-assisted cell sorting, LSCM with single-photon and two-photon excitation...
December 2, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27919101/the-risk-of-pedestrian-collisions-with-peripheral-visual-field-loss
#17
Eli Peli, Henry Apfelbaum, Eliot L Berson, Robert B Goldstein
Patients with peripheral field loss complain of colliding with other pedestrians in open-space environments such as shopping malls. Field expansion devices (e.g., prisms) can create artificial peripheral islands of vision. We investigated the visual angle at which these islands can be most effective for avoiding pedestrian collisions, by modeling the collision risk density as a function of bearing angle of pedestrians relative to the patient. Pedestrians at all possible locations were assumed to be moving in all directions with equal probability within a reasonable range of walking speeds...
December 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/27918644/self-assembled-supramolecular-nanogels-as-a-safe-and-effective-drug-delivery-vector-for-cancer-therapy
#18
Chih-Chia Cheng, Mei-Chih Liang, Zhi-Sheng Liao, Jyun-Jie Huang, Duu-Jong Lee
Simple construction and manipulation of low-molecular-weight supramolecular nanogels, based on the introduction of multiple hydrogen bonding interactions, with the desired physical properties to achieve effective and safe delivery of drugs for cancer therapy remain highly challenging. Herein, a novel supramolecular oligomer cytosine (Cy)-polypropylene glycol containing self-complementary multiple hydrogen-bonded Cy moieties is developed, which undergoes spontaneous self-assembly to form nanosized particles in an aqueous environment...
December 5, 2016: Macromolecular Bioscience
https://www.readbyqxmd.com/read/27918535/disease-variants-alter-transcription-factor-levels-and-methylation-of-their-binding-sites
#19
Marc Jan Bonder, René Luijk, Daria V Zhernakova, Matthijs Moed, Patrick Deelen, Martijn Vermaat, Maarten van Iterson, Freerk van Dijk, Michiel van Galen, Jan Bot, Roderick C Slieker, P Mila Jhamai, Michael Verbiest, H Eka D Suchiman, Marijn Verkerk, Ruud van der Breggen, Jeroen van Rooij, Nico Lakenberg, Wibowo Arindrarto, Szymon M Kielbasa, Iris Jonkers, Peter van 't Hof, Irene Nooren, Marian Beekman, Joris Deelen, Diana van Heemst, Alexandra Zhernakova, Ettje F Tigchelaar, Morris A Swertz, Albert Hofman, André G Uitterlinden, René Pool, Jenny van Dongen, Jouke J Hottenga, Coen D A Stehouwer, Carla J H van der Kallen, Casper G Schalkwijk, Leonard H van den Berg, Erik W van Zwet, Hailiang Mei, Yang Li, Mathieu Lemire, Thomas J Hudson, P Eline Slagboom, Cisca Wijmenga, Jan H Veldink, Marleen M J van Greevenbroek, Cornelia M van Duijn, Dorret I Boomsma, Aaron Isaacs, Rick Jansen, Joyce B J van Meurs, Peter A C 't Hoen, Lude Franke, Bastiaan T Heijmans
Most disease-associated genetic variants are noncoding, making it challenging to design experiments to understand their functional consequences. Identification of expression quantitative trait loci (eQTLs) has been a powerful approach to infer the downstream effects of disease-associated variants, but most of these variants remain unexplained. The analysis of DNA methylation, a key component of the epigenome, offers highly complementary data on the regulatory potential of genomic regions. Here we show that disease-associated variants have widespread effects on DNA methylation in trans that likely reflect differential occupancy of trans binding sites by cis-regulated transcription factors...
December 5, 2016: Nature Genetics
https://www.readbyqxmd.com/read/27918456/examining-the-cervical-screening-behaviour-of-women-aged-50-or-above-and-its-predicting-factors-a-population-based-survey
#20
Carmen W H Chan, Kai Chow Choi, Rosa S Wong, Ka Ming Chow, Winnie K W So, Doris Y P Leung, Wendy W T Lam, William Goggins
Under-screening may increase the risk of cervical cancer in middle-aged women. This study aimed to investigate cervical cancer screening behaviour and its predictors among women aged 50 years or above. A population-based sample of 959 women was recruited by telephone from domestic households in Hong Kong, using random methods, and a structured questionnaire developed to survey participants. Multivariable logistic regressions were performed to examine the factors independently associated with cervical screening behaviour...
December 2, 2016: International Journal of Environmental Research and Public Health
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