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https://www.readbyqxmd.com/read/28104909/selective-neuronal-vulnerability-in-parkinson-disease
#1
D James Surmeier, José A Obeso, Glenda M Halliday
Intracellular α-synuclein (α-syn)-rich protein aggregates called Lewy pathology (LP) and neuronal death are commonly found in the brains of patients with clinical Parkinson disease (cPD). It is widely believed that LP appears early in the disease and spreads in synaptically coupled brain networks, driving neuronal dysfunction and death. However, post-mortem analysis of human brains and connectome-mapping studies show that the pattern of LP in cPD is not consistent with this simple model, arguing that, if LP propagates in cPD, it must be gated by cell- or region-autonomous mechanisms...
January 20, 2017: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/28098985/hmgb1-stimulates-activity-of-polymerase-%C3%AE-on-nucleosome-substrates
#2
Angela Balliano, Fanfan Hao, Catherine Njeri, Lata Balakrishnan, Jeffrey J Hayes
The process of base excision repair (BER) recognizes and repairs small lesions or inappropriate bases on DNA through either a short-patch or long-patch pathway. The enzymes involved in BER have been well-characterized on DNA substrates, and, somewhat surprisingly, many of these enzymes, including several DNA glycosylases, AP endonuclease (APE), FEN1 endonuclease, and DNA ligases, have been shown to have activity on DNA substrates within nucleosomes. DNA polymerase β (Pol β), however, exhibits drastically reduced or no activity on nucleosomal DNA...
January 18, 2017: Biochemistry
https://www.readbyqxmd.com/read/28097840/assessment-of-lipid-profile-and-some-risk-factors-of-atherosclerosis-in-children-whose-parents-had-early-onset-coronary-artery-disease
#3
Helen Bornaun, Naci Öner, Kemal Nişli, Kazım Öztarhan, Taner Yavuz, Ümit Türkoğlu, Aygün Dindar, Rukiye Eker Ömeroglu
BACKGROUND/AIM: The objective of our study was to analyze the lipid profile and some risk factors of atherosclerosis such as oxidized-low density lipoprotein (ox-LDL), small dense LDL (sd LDL) in the offspring of patients with premature coronary heart disease (CHD). POPULATION AND METHODS: Children whose parents had early onset CHD were matched with age and sex pairs. Study and controls were analyzed for lipid levels, apolipoproteins (Apo- A,B,E), ox-LDL, sd LDL and lipoprotein (a) [Lp(a)]...
1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28097816/effect-of-temperature-and-colonization-of-legionella-pneumophila-and-vermamoeba-vermiformis-on-bacterial-community-composition-of-copper-drinking-water-biofilms
#4
Helen Y Buse, Pan Ji, Vicente Gomez-Alvarez, Amy Pruden, Marc A Edwards, Nicholas J Ashbolt
It is unclear how the water-based pathogen, Legionella pneumophila (Lp), and associated free-living amoeba (FLA) hosts change or are changed by the microbial composition of drinking water (DW) biofilm communities. Thus, this study characterized the bacterial community structure over a 7-month period within mature (> 600-day-old) copper DW biofilms in reactors simulating premise plumbing and assessed the impact of temperature and introduction of Lp and its FLA host, Vermamoeba vermiformis (Vv), co-cultures (LpVv)...
January 18, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28097806/a-silicone-rubber-membrane-with-a-specific-pore-size-enhances-cell-proliferation-and-wound-regeneration-via-the-wnt-%C3%AE-catenin-pathway
#5
Rui Xu, Yang Bai, Jian Zhao, Hesheng Xia, Yi Kong, Zhihui Yao, Rongshuai Yan, Xiaorong Zhang, Xiaohong Hu, Meixi Liu, Qingwu Yang, Gaoxing Luo, Jun Wu
A porous structure is critically important for wound dressing or tissue engineering scaffolds. However, the influence of the pore sizes on cell proliferation, tissue regeneration and the underlying mechanism remains unclear. In this study, silicone rubber membranes with different pore sizes were prepared using certain constituents of liquid silicone rubber (LSR) precursor/ liquid paraffin (LP) /hexane based on our previous studies. It was found that pore size had a significant impact on cell proliferation and wound healing...
January 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28094374/combined-in-and-ex-situ-studies-of-pyrazine-adsorption-into-the-aliphatic-mof-al-cau-13-structures-dynamics-and-correlations
#6
Helge Reinsch, Jannik Benecke, Martin Etter, Niclas Heidenreich, Norbert Stock
The intercalation of different pyrazines (pyrazine, methylpyrazine, 2,5-dimethylpyrazine, 2,3-dimethylpyrazine, trimethylpyrazine and tetramethylpyrazine) into the trans-1,4-cyclohexanedicarboxylate (CDC(2-)) based Al-MOF [Al(OH)(CDC)], denoted as CAU-13, was investigated. The adsorption of the guest molecules into the flexible MOF was carried out from an aqueous solution or via vapour phase adsorption, starting with the hydrated narrow-pore form of the framework [Al(OH)(O2C-C6H10-CO2)]·H2O (CAU-13-np). The obtained host-guest systems were characterised by thermogravimetry and vibrational spectroscopy and their crystal structures were elucidated using powder X-ray diffraction (PXRD) data...
January 17, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28094269/dyslipidaemias-cardiovascular-effects-of-low-lp-a
#7
Gregory B Lim
No abstract text is available yet for this article.
January 17, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28093423/medical-and-psychosocial-factors-associated-with-antibiotic-prescribing-in-primary-care-survey-questionnaire-and-factor-analysis
#8
Tau-Hong Lee, Joshua Gx Wong, David Cb Lye, Mark Ic Chen, Victor Wk Loh, Yee-Sin Leo, Linda K Lee, Angela Lp Chow
BACKGROUND: Acute upper respiratory infections (AURI) are the leading causes of antibiotic prescribing in primary care although antibiotics are often not indicated. AIM: To gain an understanding of the knowledge, attitudes, and practices (KAP) of GPs in Singapore and the associated latent factors to guide the implementation of an effective programme to reduce antibiotic use in primary care. DESIGN AND SETTING: An anonymous survey on the KAP of antibiotic use in AURI of GPs in Singapore...
January 16, 2017: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/28089142/bedside-monitoring-of-cerebral-energy-state-during-cardiac-surgery-a-novel-approach-utilizing-intravenous-microdialysis
#9
Simon Mölström, Troels H Nielsen, Claus Andersen, Carl H Nordström, Palle Toft
OBJECTIVES: This study investigated whether the lactate-to-pyruvate (LP) ratio obtained by microdialysis (MD) of the cerebral venous outflow reflected a derangement of global cerebral energy state during cardiopulmonary bypass (CPB). DESIGN: Interventional, prospective, randomized study. SETTING: Single-center, university teaching hospital. PARTICIPANTS: The study included 10 patients undergoing primary, elective coronary artery bypass grafting...
November 2, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28088654/transcriptional-response-of-skeletal-muscle-to-a-low-protein-perinatal-diet-in-rat-offspring-at-different-ages-the-role-of-key-enzymes-of-glucose-fatty-acid-oxidation
#10
José Luiz de Brito Alves, Ana Elisa Toscano, João Henrique da Costa-Silva, Hubert Vidal, Carol Góis Leandro, Luciano Pirola
Skeletal muscle is a plastic tissue during development with distinctive acute and chronic response to maternal protein restriction. This study evaluated gene and protein expression of key-enzymes of glycolytic pathway (HK2, PFK, PDK4 and CS), and fatty acid oxidation (CPT1 and β-HAD) of two different types of skeletal muscle [soleus and extensor digitorium longus (EDL)] from offspring rats at 30 and 90 days of age, exposed to maternal isoenergetic low protein diet throughout gestation and lactation. Pups from dams fed 17% protein diet (n=5, normal protein, Np), and low protein pups from dams fed 8% casein diet (low protein, Lp, n=5) were evaluated...
December 15, 2016: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28088409/genome-wide-association-analysis-and-pathways-enrichment-for-lactation-persistency-in-canadian-holstein-cattle
#11
D N Do, N Bissonnette, P Lacasse, F Miglior, M Sargolzaei, X Zhao, E M Ibeagha-Awemu
Lactation persistency (LP), defined as the rate of declining milk yield after milk peak, is an economically important trait for dairy cattle. Improving LP is considered a good alternative method for increasing overall milk production because it does not cause the negative energy balance and other health issues that cows experience during peak milk production. However, little is known about the biology of LP. A genome-wide association study (GWAS) and pathway enrichment were used to explore the genetic mechanisms underlying LP...
January 11, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28078998/lipoprotein-a-management-pharmacological-and-apheretic-treatment
#12
Ruth Hanssen, Ioanna Gouni-Berthold
Lipoprotein (a) [Lp(a)] is an low-density lipoprotein (LDL)-like particle with an additional apolipoprotein, apolipoprotein (a), [apo(a)] attached to apolipoprotein B. Recent epidemiologic and Mendelian randomization studies have provided evidence that Lp(a) is causally related to the pathogenesis of atherosclerosis and cardiovascular disease (CVD). The risk association between Lp(a) concentrations and CVD is still controversial but seems to be continuous and without an obvious threshold Lp(a) level. Circulating concentrations of Lp(a) are genetically determined; desirable levels are amplt; 50 mg/dl...
12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28078997/lipoprotein-a-and-cardiovascular-risk-the-show-must-go-on
#13
Niki Katsiki, Khalid Al-Rasadi, Dimitri P Mikhailidis
Lipoprotein (a) [Lp(a)] is an independent but moderate, predictor for coronary heart disease (CHD) prevalence and severity. Several established and emerging cardiovascular (CV) risk factors including age, gender, ethnicity, smoking, dyslipidemia, hypertension, obesity, type 2 diabetes mellitus, alcohol consumption, arterial stiffness and hyperuricemia have been linked to Lp(a) metabolism. Apart from CHD, Lp(a) has been also associated with non-cardiac vascular diseases and diseases associated with increased CV risk such as chronic kidney disease, metabolic syndrome, non-alcoholic fatty liver disease, erectile dysfunction, obstructive sleep apnea syndrome, inflammatory bowel diseases and human immunodeficiency virus infection...
January 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28078650/in-vivo-efficacy-of-latex-from-calotropis-procera-in-ameliorating-fever-biochemical-characteristics-and-plausible-mechanism
#14
Vijay L Kumar, B Guruprasad, Syed Meraj A Fatmi, Priyanka Chaudhary, Nylane Maria Nunes Alencar, José Vitor Moreira Lima-Filho, Márcio Viana Ramos
Calotropis procera latex fractions possessing anti-inflammatory property were characterized for their biochemical properties, compared for their efficacy in ameliorating fever in rats and their mechanism of action was elucidated. Aqueous fraction and methanol extract (AqDL and MeDL) were derived from the dried latex (DL) and proteins were separated from the fresh latex (LP). Polyacrylamide gel electrophoresis carried out under denaturing conditions showed the presence of proteins with some similarity in LP and AqDL and both of these fractions exhibited proteinase activity by gelatin zymography...
January 11, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28076570/bilateral-retinal-vasculitis-in-a-patient-with-lichen-planus
#15
Seyhan Dikci, Oğuzhan Genç, Turgut Yılmaz, Penpe Gül Fırat
Lichen planus (LP) is an autoimmune, inflammatory disease of unknown etiology that commonly affects the skin and mucous membranes. Retinal vasculitis is a group of vision-threatening disorders, in which autoimmunity is thought to play a role in pathogenesis. We present the case of a patient who was diagnosed with retinal vasculitis and who was followed up for mucosal LP. LP has not been reported as a cause of retinal vasculitis in the literature. We believe that the retinal vasculitis in this case was related to LP because cellular immunity plays a role in the pathogenesis of both entities...
November 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28072425/direct-microscale-measurement-of-mouse-oocyte-membrane-permeability-to-water-and-ethylene-glycol-at-subzero-temperatures-using-cryomicroscopy
#16
X Han
:   BACKGROUND: Investigation of cell osmotic behavior at subzero temperatures is of critical importance to the optimization of cooling procedures for cryopreservation. Based on established thermodynamic models, plasma membrane permeability coefficients for water and cryoprotectant agent (CPA) (Lcpa, Pp) and their activation energies (Ea(Lp), Ea(Pcpa)) are essential to predict the change of cell volume and composition of intracellular solutions corresponding to different cooling procedures...
November 2016: Cryo Letters
https://www.readbyqxmd.com/read/28070917/dual-energy-ct-quantitative-imaging-a-comparison-study-between-twin-beam-and-dual-source-ct-scanners
#17
Isabel P Almeida, Lotte E J R Schyns, Michel C Öllers, Wouter van Elmpt, Katia Parodi, Guillaume Landry, Frank Verhaegen
PURPOSE: To assess image quality and to quantify the accuracy of relative electron densities (ρe ) and effective atomic numbers (Zeff ) for three dual-energy computed tomography (DECT) scanners: a novel single-source split-filter (i.e., twin-beam) and two dual-source scanners. METHODS: Measurements were made with a second generation dual-source scanner at 80/140Sn kVp, a third-generation twin-beam single-source scanner at 120 kVp with gold (Au) and tin (Sn) filters, and a third-generation dual-source scanner at 90/150Sn kVp...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28069835/multielectrode-vs-point-by-point-mapping-for-ventricular-tachycardia-substrate-ablation-a-randomized-study
#18
Juan Acosta, Diego Penela, David Andreu, Mario Cabrera, Alicia Carlosena, Francesca Vassanelli, Francisco Alarcón, David Soto-Iglesias, Viatcheslav Korshunov, Roger Borras, Markus Linhart, Mikel Martínez, Juan Fernández-Armenta, Lluis Mont, Antonio Berruezo
AIMS: Ventricular tachycardia (VT) substrate ablation is based on detailed electroanatomical maps (EAM). This study analyses whether high-density multielectrode mapping (MEM) is superior to conventional point-by-point mapping (PPM) in guiding VT substrate ablation procedures. METHODS AND RESULTS: This was a randomized controlled study (NCT02083016). Twenty consecutive ischemic patients undergoing VT substrate ablation were randomized to either group A [n = 10; substrate mapping performed first by PPM (Navistar) and secondly by MEM (PentaRay) ablation guided by PPM] or group B [n = 10; substrate mapping performed first by MEM and second by PPM ablation guided by MEM]...
January 8, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28068801/the-prevalence-of-lipoprotein-a-measurement-and-degree-of-elevation-among-2710-patients-with-calcific-aortic-valve-stenosis-in-an-academic-echocardiography-laboratory-setting
#19
Michael J Wilkinson, Gary S Ma, Calvin Yeang, Lawrence Ang, Monet Strachan, Anthony N DeMaria, Sotirios Tsimikas, Bruno Cotter
Lipoprotein(a; Lp[a]) and its associated oxidized phospholipids are causal, genetic risk factors for calcific aortic valve stenosis (CAVS). We determined the prevalence of Lp(a) measurement among 2710 patients with CAVS and 1369 control patients (∼50% of study group) without CAVS with an echocardiogram between January 2010 and February 2016 in an academic echocardiography laboratory. Lipoprotein(a) measurements were performed at a referral laboratory using an isoform-independent assay. The prevalence of any Lp(a) measurement was 4...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/28068238/hematologic-nadirs-during-chemoradiation-for-anal-cancer-temporal-characterization-and-dosimetric-predictors
#20
Andrew Y Lee, Daniel W Golden, Jose G Bazan, Malgorzata Kopec, Charles A Pelizzari, Sonya Aggarwal, Daniel T Chang, Stanley L Liauw
PURPOSE: Pelvic bone marrow (BM) constraints may offer a means to reduce the toxicity commonly associated with chemoradiation for anal cancer. We conducted a bi-institutional analysis of dose-volume metrics in a time-sensitive fashion to devise practical metrics to minimize hematologic toxicity. METHODS AND MATERIALS: Fifty-six anal cancer patients from 2 institutions received definitive radiation therapy (median primary dose of 54 Gy) using intensity modulated radiation therapy (IMRT, n=49) or 3-dimensional (3D) conformal therapy (n=7) with concurrent 5-fluorouracil (5-FU) and mitomycin C...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
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