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https://www.readbyqxmd.com/read/28076461/an-in-vitro-evaluation-of-various-irrigation-techniques-for-the-removal-of-double-antibiotic-paste-from-root-canal-surfaces
#1
Hakan Gokturk, Ismail Ozkocak, Fevzi Buyukgebiz, Osman Demir
Objective: The aim of this study was to investigate the effectiveness of conventional syringe irrigations, passive ultrasonic irrigation (PUI), Vibringe, CanalBrush, XP-endo Finisher, and laser-activated irrigation (LAI) systems in removing double antibiotic paste (DAP) from root canals. Material and Methods: One hundred five extracted single-rooted teeth were instrumented. The roots were split longitudinally. Three standard grooves were created and covered with DAP...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28071975/dynamics-of-fluoroquinolones-induced-resistance-in-dna-gyrase-of-mycobacterium-tuberculosis
#2
Bharati Pandey, Sonam Grover, Chetna Tyagi, Sukriti Goyal, Salma Jamal, Aditi Singh, Jagdeep Kaur, Abhinav Grover
DNA gyrase is a validated target of fluoroquinolones which are key components of multidrug resistance (MDR) TB treatment. Most frequent occurring mutations associated with high level of resistance to fluoroquinolone in clinical isolates of TB patients are A90V, D94G and A90V-D94G (double mutant), present in the larger subunit of DNA Gyrase. In order to explicate the molecular mechanism of drug resistance corresponding to these mutations, molecular dynamics and mechanics approach was applied. Structure based molecular docking of complex comprised of DNA bound with Gyrase A (large subunit) and Gyrase C (small subunit) with moxifloxacin revealed high binding affinity to wild type with considerably high Glide XP docking score of -7...
January 10, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28054914/detailed-audiological-evaluation-of-a-patient-with-xeroderma-pigmentosum-with-neural-degeneration
#3
Danielle Mercer, Annette Hurley, Fern Tsien
BACKGROUND: Xeroderma pigmentosum (XP) is a rare autosomal recessive condition characterized by extreme sensitivity to ultraviolet light. Individuals with XP lack the ability to repair DNA (deoxyribonucleic acid) damage caused by ultraviolet radiation, leading to sunburn and increased susceptibility to skin cancers. Approximately 25% of patients also exhibit neural degeneration, which includes progressive mental deterioration, cortical thinning, and sensorineural hearing loss. PURPOSE: Herein, we describe the audiological and genetic findings in a patient with XP subtype D with neural degeneration and hearing loss...
January 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28054783/inxga1-xp-nanowire-growth-dynamics-strongly-affected-by-doping-using-diethylzinc
#4
Gaute Otnes, Magnus Heurlin, Xulu Zeng, Magnus T Borgström
Semiconductor nanowires are versatile building blocks for optoelectronic devices, in part because nanowires offer an increased freedom in material design due to relaxed constraints on lattice matching during the epitaxial growth. This enables the growth of ternary alloy nanowires in which the bandgap is tunable over a large energy range, desirable for optoelectronic devices. However, little is known about the effects of doping in the ternary nanowire materials, a prerequisite for applications. Here we present a study of p-doping of InxGa1-xP nanowires and show that the growth dynamics are strongly affected when diethylzinc is used as a dopant precursor...
January 5, 2017: Nano Letters
https://www.readbyqxmd.com/read/28049479/sequence-conservation-of-plasmodium-vivax-glutamate-dehydrogenase-among-korean-isolates-and-its-application-in-seroepidemiology
#5
Bomin Seol, Hyun-Il Shin, Jung-Yeon Kim, Bo-Young Jeon, Yoon-Joong Kang, Jhang-Ho Pak, Tong-Soo Kim, Hyeong-Woo Lee
BACKGROUND: Glutamate dehydrogenase of malaria parasites (pGDH) is widely used in rapid diagnostic tests for malaria. Variation in the pGDH gene among Korean isolates of Plasmodium vivax was analysed, and a recombinant pGDH protein was evaluated for use as antigens for the serodiagnosis of vivax malaria. METHODS: Genomic DNA was purified from blood samples of 20 patients and the pGDH gene of P. vivax was sequenced. Recombinant protein was prepared to determine the antigenicity of pGDH by enzyme-linked immunosorbent assay (ELISA)...
January 3, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28048300/th-cd-206-10-clinical-application-of-the-mind-demons-algorithm-for-symmetric-diffeomorphic-deformable-mr-to-ct-image-registration-in-spinal-interventions
#6
S Reaungamornrat, T De Silva, A Uneri, J Wolinsky, A Khanna, G Kleinszig, S Vogt, J Prince, J Siewerdsen
PURPOSE: Accurate intraoperative localization of target anatomy (e.g., tumors and vertebral levels) and critical structures (e.g., nerves and vessels) is essential to safe, effective surgery. Preoperative CT/MR images can be used to identify such vital anatomy in intraoperative images through multimodality deformable registration. We proposed a deformable registration method to align preoperative MR to intraoperative CT using modality-independent neighborhood descriptors (MIND) and a Huber metric for robust registration...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28027064/novel-pathogenic-variant-in-the-hras-gene-with-lethal-outcome-and-a-broad-phenotypic-spectrum-among-polish-patients-with-costello-syndrome
#7
Magdalena Pelc, Elżbieta Ciara, Aleksandra Jezela-Stanek, Monika Kugaudo, Agata Cieślikowska, Dorota Jurkiewicz, Magdalena Janeczko, Krystyna Chrzanowska, Małgorzata Krajewska-Walasek, Agata Skórka
Costello syndrome (CS) is a rare congenital disorder from the group of RASopathies, characterized by a distinctive facial appearance, failure to thrive, cardiac and skin anomalies, intellectual disability, and a predisposition to neoplasia. CS is associated with germline mutations in the proto-oncogene HRAS, a small GTPase from the Ras family. In this study, a molecular and clinical analysis was carried out in eight Polish patients with the Costello phenotype. A molecular test showed two known heterozygous mutations in the first coding exon of the gene in seven patients: p...
December 23, 2016: Clinical Dysmorphology
https://www.readbyqxmd.com/read/28011151/the-cyclopurine-deoxynucleosides-dna-repair-biological-effects-mechanistic-insights-and-unanswered-questions
#8
Philip J Brooks
Patients with the genetic disease xeroderma pigmentosum (XP) who lack the capacity to carry out nucleotides excision repair (NER) have a dramatically elevated risk of skin cancer on sun exposed areas of the body. NER is the DNA repair mechanism responsible for the removal of DNA lesions resulting from ultraviolet light. In addition, a subset of XP patients develop a progressive neurodegenerative disease, referred to as XP neurologic disease, which is thought to be the result of accumulation of endogenous DNA lesions that are repaired by NER but not other repair pathways...
December 21, 2016: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28001157/multidentate-2-pyridyl-phosphine-ligands-towards-ligand-tuning-and-chirality
#9
S Hanf, R García-Rodríguez, S Feldmann, A D Bond, E Hey-Hawkins, D S Wright
In the current work a range of multidentate pyridyl-phosphine ligands are synthesised with tuneable electronic and steric character, through the incorporation of a variety of alcohols into (amino)pyridyl-phosphine frameworks. The stoichiometric reactions of compounds of the type (R2N)xP(2-py)3-x (2-py = 2-pyridyl) with alkyl as well as aryl alcohols result in the formation of (alkoxy)pyridyl-phosphines (RO)xP(2-py)3-x (R = Me, 2-Bu, Ph). This synthetic procedure also allows the introduction of enantiomerically pure alcohols, like (R)-(-)-2-BuOH and (S)-(+)-2-BuOH, and as such provides a very convenient two-step route to chiral multidentate pyridyl-phosphine ligand sets...
December 21, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27994034/ribonucleotide-incorporation-by-human-dna-polymerase-%C3%AE-impacts-translesion-synthesis-and-rnase-h2-activity
#10
Elisa Mentegari, Emmanuele Crespan, Laura Bavagnoli, Miroslava Kissova, Federica Bertoletti, Simone Sabbioneda, Ralph Imhof, Shana J Sturla, Arman Nilforoushan, Ulrich Hübscher, Barbara van Loon, Giovanni Maga
Ribonucleotides (rNs) incorporated in the genome by DNA polymerases (Pols) are removed by RNase H2. Cytidine and guanosine preferentially accumulate over the other rNs. Here we show that human Pol η can incorporate cytidine monophosphate (rCMP) opposite guanine, 8-oxo-7,8-dihydroguanine, 8-methyl-2'-deoxyguanosine and a cisplatin intrastrand guanine crosslink (cis-PtGG), while it cannot bypass a 3-methylcytidine or an abasic site with rNs as substrates. Pol η is also capable of synthesizing polyribonucleotide chains, and its activity is enhanced by its auxiliary factor DNA Pol δ interacting protein 2 (PolDIP2)...
December 19, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27989103/detecting-positive-selection-of-korean-native-goat-populations-using-next-generation-sequencing
#11
Wonseok Lee, Sojin Ahn, Mengistie Taye, Samsun Sung, Hyun-Jeong Lee, Seoae Cho, Heebal Kim
Goats (Capra hircus) are one of the oldest species of domesticated animals. Native Korean goats are a particularly interesting group, as they are indigenous to the area and were raised in the Korean peninsula almost 2,000 years ago. Although they have a small body size and produce low volumes of milk and meat, they are quite resistant to lumbar paralysis. Our study aimed to reveal the distinct genetic features and patterns of selection in native Korean goats by comparing the genomes of native Korean goat and crossbred goat populations...
December 2016: Molecules and Cells
https://www.readbyqxmd.com/read/27982466/expansion-of-the-genotypic-and-phenotypic-spectrum-of-xeroderma-pigmentosum-in-chinese-population
#12
Jia Zhang, Ruhong Cheng, Xia Yu, Zhonghui Sun, Ming Li, Zhirong Yao
BACKGROUND: Xeroderma pigmentosum (XP) is a rare genodermatoses characterized by exaggerated sunburn reactions, freckle-like pigmentation and a high possibility of developing cutaneous tumors. XP comprised seven complementation groups (from XP-A to XP-G) and a variant form XP-V. METHODS: This study was based on five unrelated Chinese families with six patients clinically suspected to be XP. Mutation screening was performed by direct sequencing of the entire coding region of eight XP genes...
December 16, 2016: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/27981900/pharmacophore-and-docking-guided-virtual-screening-study-for-discovery-of-type-i-inhibitors-of-vegfr-2-kinase
#13
Heena R Bhojwani, Urmila J Joshi
BACKGROUND: Kinase domain of VEGFR-2 displays conformational flexibility which leads to existence of two kinds of inhibitors viz. type I and type II inhibitors. They exhibit different binding modes and this necessitates the development of separate pharmacophore models for them. METHODS: The virtual screening study for discovery of type I inhibitors of VEGFR-2 kinase was done by using combined pharmacophore (generated using PHASE and validated by 3D-QSAR) and docking (Glide) based approach...
December 14, 2016: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/27960532/pseudodirect-to-direct-compositional-crossover-in-wurtzite-gap-inxga1-xp-core-shell-nanowires
#14
L Gagliano, A Belabbes, M Albani, S Assali, M A Verheijen, L Miglio, F Bechstedt, J E M Haverkort, E P A M Bakkers
Thanks to their uniqueness, nanowires allow the realization of novel semiconductor crystal structures with yet unexplored properties, which can be key to overcome current technological limits. Here we develop the growth of wurtzite GaP/InxGa1-xP core-shell nanowires with tunable indium concentration and optical emission in the visible region from 590 nm (2.1 eV) to 760 nm (1.6 eV). We demonstrate a pseudodirect (Γ8c-Γ9v) to direct (Γ7c-Γ9v) transition crossover through experimental and theoretical approach...
December 14, 2016: Nano Letters
https://www.readbyqxmd.com/read/27942930/phase-ii-trial-of-capecitabine-plus-modified-cisplatin-mxp-as-first-line-therapy-in-japanese-patients-with-metastatic-gastric-cancer-kscc1104
#15
Hironaga Satake, Masaaki Iwatsuki, Yoshikazu Uenosono, Takeshi Shiraishi, Hiroaki Tanioka, Hiroshi Saeki, Keishi Sugimachi, Dai Kitagawa, Mototsugu Shimokawa, Eiji Oki, Yasunori Emi, Yoshihiro Kakeji, Akihito Tsuji, Yoshito Akagi, Shoji Natsugoe, Hideo Baba, Yoshihiko Maehara
PURPOSE: Capecitabine plus cisplatin (XP) is a standard therapy for metastatic gastric cancer (mGC). However, while results from previous phase III trials suggested that the cisplatin dosage should be reduced in Japanese patients, no clinical data exist to support this. Here, we conducted a multicenter study to evaluate the efficacy and safety of modified XP (mXP) in Japanese patients with mGC. METHODS: Patients with previously untreated mGC received mXP (cisplatin 60 mg/m(2) on day 1 plus capecitabine 1000 mg/m(2) twice daily on days 1-14) every 3 weeks...
December 10, 2016: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/27939826/in%C3%A2-vitro-efficacy-of-xp-endo-finisher-with-2-different-protocols-on-biofilm-removal-from-apical-root-canals
#16
Pingping Bao, Ya Shen, James Lin, Markus Haapasalo
INTRODUCTION: The purpose of this study was to evaluate the effectiveness of the XP-endo Finisher (XPF; FKG Dentaire SA, La Chaux-de-Fonds, Switzerland) in biofilm removal in comparison with conventional needle irrigation (CNI) and passive ultrasonic irrigation (PUI) using an infected tooth model with an artificial apical groove. METHODS: Fifty-four extracted human single-rooted premolars were selected. Each tooth was split longitudinally into 2 halves, with a groove made in the apical segment of the canal wall...
December 7, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27939736/efficacy-of-xp-endo-finisher-file-in-removing-calcium-hydroxide-from-simulated-internal-resorption-cavity
#17
Cangül Keskin, Evren Sariyilmaz, Öznur Sariyilmaz
INTRODUCTION: The aim of this study was to evaluate the effect of supplementary use of XP-endo Finisher file, passive ultrasonic activation (PUI), EndoActivator (EA), and CanalBrush (CB) on the removal of calcium hydroxide (CH) paste from simulated internal resorption cavities. METHODS: The root canals of 110 extracted single-rooted teeth with straight canals were prepared up to size 50. The specimens were split longitudinally, and standardized internal resorption cavities were prepared with burs...
January 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/27934413/synthesis-characterization-and-low-temperature-transport-properties-of-eu11-xybxcd6sb12-solid-solution-zintl-phases
#18
Nasrin Kazem, Joya Cooley, Edward C Burks, Kai Liu, Susan M Kauzlarich
Eu11-xYbxCd6Sb12 Zintl solid solutions have been prepared by tin flux reaction by employing the elements Eu/Yb/Cd/Sb/Sn in the ratio 11 - xp:xp:6:12:30, where xp is an integer less than 11 representing the preparative amount of Eu (11 - xp) and Yb (xp). Efforts to make the Yb compositions for x exceeding ∼3 resulted in structures other than the Sr11Cd6Sb12 structure type. The crystal structures and compositions were determined by single-crystal and powder X-ray diffraction and wavelength-dispersive X-ray analysis measurements...
December 5, 2016: Inorganic Chemistry
https://www.readbyqxmd.com/read/27930647/allelic-variation-in-cxcl16-determines-cd3-t-lymphocyte-susceptibility-to-equine-arteritis-virus-infection-and-establishment-of-long-term-carrier-state-in-the-stallion
#19
Sanjay Sarkar, Ernest Bailey, Yun Young Go, R Frank Cook, Ted Kalbfleisch, John Eberth, R Lakshman Chelvarajan, Kathleen M Shuck, Sergey Artiushin, Peter J Timoney, Udeni B R Balasuriya
Equine arteritis virus (EAV) is the causative agent of equine viral arteritis (EVA), a respiratory, systemic, and reproductive disease of horses and other equid species. Following natural infection, 10-70% of the infected stallions can become persistently infected and continue to shed EAV in their semen for periods ranging from several months to life. Recently, we reported that some stallions possess a subpopulation(s) of CD3+ T lymphocytes that are susceptible to in vitro EAV infection and that this phenotypic trait is associated with long-term carrier status following exposure to the virus...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27925387/microcomputed-tomography-evaluation-of-volumetric-shrinkage-of-bulk-fill-composites-in-class-ii-cavities
#20
Hamad Algamaiah, Camila S Sampaio, Lindiane C Rigo, Malvin N Janal, Marcelo Giannini, Estevam A Bonfante, Paulo G Coelho, Andre F Reis, Ronaldo Hirata
PURPOSE: This study aimed to quantify polymerization shrinkage of one conventional and three bulk-fill composites, under bonded and unbonded conditions, in Class II preparations using 3D microcomputed tomography (μCT) and report its location. MATERIALS AND METHODS: Preparations (2.5 mm occlusal depth × 4 mm wide × 4 mm mesial box and 1 mm beyond the CEJ distal box depth) were made in 48 human extracted molars (n = 6). Four composites were tested, one regular (Vitalescence/VIT) and three bulk-fill: SureFil SDR Flow (SDR), Tetric EvoCeram Bulk Fill (TET), and Filtek flowable Bulk Fill (FIL)...
December 7, 2016: Journal of Esthetic and Restorative Dentistry
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