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https://www.readbyqxmd.com/read/28221670/endophlebectomy-of-the-common-femoral-vein-and-arteriovenous-fistula-creation-as-adjuncts-to-venous-stenting-for-post-thrombotic-syndrome
#1
M A F de Wolf, H Jalaie, J H H van Laanen, R L M Kurstjens, M J S Mensinck, M J de Geus, A Gombert, R de Graaf, C H A Wittens
BACKGROUND: Good results have been reported for angioplasty and stenting of post-thrombotic lesions of the iliac and proximal femoral veins. If lesions at the origin of the superficial femoral and profunda veins are stented, the intraluminal synechiae can be pushed against the orifices of inflow vessels, potentially decreasing stent inflow. Surgical disobliteration of the common femoral vein (endophlebectomy) has been suggested to mitigate this problem. Because of a temporary increase in thrombogenicity, this procedure may be accompanied by arteriovenous fistula creation...
February 21, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28220326/simultaneous-detection-of-severe-acute-respiratory-syndrome-middle-east-respiratory-syndrome-and-related-bat-coronaviruses-by-real-time-reverse-transcription-pcr
#2
Ji Yeong Noh, Sun-Woo Yoon, Doo-Jin Kim, Moo-Seung Lee, Ji-Hyung Kim, Woonsung Na, Daesub Song, Dae Gwin Jeong, Hye Kwon Kim
Since severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) coronaviruses (CoVs) share similar characteristics with respect to clinical signs, etiology, and transmission, methods for a rapid and accurate differential diagnosis are important. Therefore, the aim of this study was to develop a duplex real-time reverse transcription (RT)-PCR method for the simultaneous detection of these viruses. Primers and probes that target the conserved spike S2 region of human SARS-CoV, MERS-CoV, and their related bat CoVs were designed...
February 20, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28216924/outcome-of-percutaneous-nephrolithotomy-in-anomalous-kidney-is-it-different
#3
Gaurav Prakash, Rahul Janak Sinha, Ankur Jhanwar, Ankur Bansal, Vishwajeet Singh
INTRODUCTION: Various anomalous kidneys such as horseshoe kidney, crossed ectopic kidney, simple ectopic kidney, pelvic ectopic kidney, kidney with duplex system, and malrotated kidney are frequently associated with stone disease. Percutaneous nephrolithotomy (PCNL) is a challenging procedure in these patients because of abnormal orientation of kidney. PATIENTS AND METHODS: Since 2005-2015, 86 patients underwent PCNL for stone removal in anomalous kidneys. Stone characteristics, type of calyceal puncture, number of punctures, need of relook procedures, mean hemoglobin drop, blood transfusion, mean operative time complications, mean hospital stay, stone free rate, and auxiliary procedure were analyzed...
January 2017: Urology Annals
https://www.readbyqxmd.com/read/28215858/molecular-survey-of-dirofilaria-immitis-and-dirofilaria-repens-by-new-real-time-taqman-%C3%A2-pcr-assay-in-dogs-and-mosquitoes-diptera-culicidae-in-corsica-france
#4
Djamel Tahir, Fadi Bittar, Hélène Barré-Cardi, Doudou Sow, Mustapha Dahmani, Oleg Mediannikov, Didier Raoult, Bernard Davoust, Philippe Parola
Dirofilaria immitis and D. repens are filarioid nematodes of animals and humans, transmitted by the bite of infected mosquitoes. Domestic and wild canids are a major natural host and reservoir for these parasites. In this study, we designed a duplex real-time PCR protocol targeting the mitochondrial cytochrome c oxidase subunit I (COI) gene, detecting both D. immitis and D. repens using two primer pairs and two Dirofilaria-specific hydrolysable probes. The sensitivity and specificity of the primers and probes were tested in both experimental and naturally infected samples...
February 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28214484/hybrid-operative-thrombectomy-is-noninferior-to-percutaneous-techniques-for-the-treatment-of-acute-iliofemoral-deep-venous-thrombosis
#5
Limael E Rodríguez, Aihab Aboukheir-Aboukheir, Ricardo Figueroa-Vicente, Hiram Soler-Bernardini, Guillermo Bolanos-Avila, Luis J Torruella-Bartolomei, Anthony J Comerota, Jorge L Martinez-Trabal
OBJECTIVE: Hybrid operative thrombectomy (HOT) is a novel technique for the treatment of acute iliofemoral deep venous thrombosis (IFDVT) and is an alternative to percutaneous techniques (PTs) that use thrombolytics. In this study, we compare perioperative and intermediate outcomes of HOT vs PT as interventions for early thrombus removal. METHODS: From July 2008 to May 2015, there were 71 consecutive patients who were treated with either PT (n = 31) or HOT (n = 40) for acute or subacute single-limb IFDVT...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28199212/transposon-mediated-directed-mutation-in-bacteria-and-eukaryotes
#6
Milton H Saier, Chika Kukita, Zhongge Zhang
Transposon-mediated "directed" mutations occur at higher frequencies when beneficial than when detrimental and relieve the stress that causes them. The first and best-studied example involves regulation of Insertion Sequence-5 (IS5) insertion into a specific activating site upstream of the glycerol utilization operon in Escherichia coli, glpFK. This event promotes high level expression of the glpFK operon, allowing glycerol utilization in wild type cells under inhibitory conditions. The phosphoenolpyruvate-dependent, sugar transporting, phosphotransferase system (PTS) influences this process by regulating cytoplasmic glycerol-3-phosphate and cyclic AMP concentrations...
March 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28197572/three-in-one-prototropy-free-highly-stable-aadd-type-self-complementary-quadruple-hydrogen-bonded-molecular-duplexes-with-a-built-in-fluorophore
#7
Sanjeev Kheria, Suresh Rayavarapu, Amol S Kotmale, Gangadhar J Sanjayan
This communication reports an effective approach for addressing the prototropy-related problems in heterocycle-based AADD-type self-assembling systems by freezing their hydrogen-bonding codes, by utilizing intramolecular bifurcated hydrogen bonding interactions. Using this strategy, we have also developed a hydroquinone-conjugated AADD-type self-assembling system adorned with three valuable features such as prototropy-free dimerization yielding single duplexes, high duplex stability and a built-in fluorophore, which would augment its application potential...
February 15, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28167691/robotic-partial-nephrectomy-for-duplex-kidney-with-ectopic-ureter-draining-in-the-vagina-in-an-adult-patient-with-urinary-incontinence
#8
Humza Mahmood, Marios Hadjipavlou, Raj Das, Chris Anderson
A duplex kidney system with an ectopic ureter draining into the vagina is a congenital malformation that typically presents as refractory urinary incontinence. Diagnosis is often difficult to establish and delayed due to a low incidence. We present the case of a patient aged 26 years with a life-long history of persistent urinary incontinence. Initial presentation was at childhood; however, the diagnosis went undetermined for 22 years. CT urography revealed a duplex kidney with an atrophic upper pole associated with an ectopic ureter that drained into the vaginal vault...
February 6, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28153776/robot-assisted-laparoscopic-pyeloureterostomy-in-infants-with-duplex-systems-and-upper-pole-hydronephrosis-variations-in-double-j-ureteral-stenting-techniques
#9
Minki Baek, Jason Au, Gene O Huang, Chester J Koh
OBJECTIVE: We describe our experience with robot-assisted laparoscopic (RAL) pyeloureterostomy in infants with duplex systems and upper pole hydronephrosis with an emphasis on the various double J (DJ) ureteral stent placement techniques. METHODS: We used our RAL pyeloureterostomy technique in two female infants with duplex systems and upper pole hydronephrosis. For case 1, we introduced the DJ stent and placed it in the recipient lower pole ureter during the robotic operation in an antegrade fashion...
January 19, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28148824/biochemical-and-genetic-functional-dissection-of-the-p38-viral-suppressor-of-rna-silencing
#10
Taichiro Iki, Marie-Aude Tschopp, Olivier Voinnet
Phytoviruses encode viral suppressors of RNA-silencing (VSRs) to counteract the plant antiviral silencing response, which relies on virus-derived small interfering (si)RNAs processed by Dicer RNaseIII enzymes and subsequently loaded into ARGONAUTE (AGO) effector proteins. Here, a tobacco cell-free system was engineered to recapitulate the key steps of antiviral RNA-silencing and, in particular, the most upstream double-stranded (ds)RNA processing reaction, not kinetically investigated thus far in the context of plant VSR studies...
February 1, 2017: RNA
https://www.readbyqxmd.com/read/28147483/a-dna-bubble-mediated-gene-regulation-system-based-on-thrombin-bound-dna-aptamers
#11
Jing Wang, Le Yang, Xun Cui, Zhe Zhang, Lichun Dong, Ningzi Guan
We describe here a novel approach to enhance the transcription of target gene in cell-free systems by symmetrically introducing duplex aptamers upstream to T7 promoter in both the sense and antisense strands of double-stranded plasmids, which leads to the formation of a DNA bubble due to the none-complementary state of the ssDNA region harboring the aptamer sequences. With the presence of thrombins, the DNA bubble would be enlarged due to the binding of aptamers with thrombins. Consequently, the recognition region of the promoter contained in the DNA bubble can be more easily recognized and bound by RNA polymerases, and the separation efficiency of the unwinding region can also be significantly improved, leading to the enhanced expression of the target gene at the transcriptional level...
February 1, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28143930/oxidative-dna-damage-is-epigenetic-by-regulating-gene-transcription-via-base-excision-repair
#12
Aaron M Fleming, Yun Ding, Cynthia J Burrows
Reactive oxygen species (ROS) have emerged as important cellular-signaling agents for cellular survival. Herein, we demonstrate that ROS-mediated oxidation of DNA to yield 8-oxo-7,8-dihydroguanine (OG) in gene promoters is a signaling agent for gene activation. Enhanced gene expression occurs when OG is formed in guanine-rich, potential G-quadruplex-forming sequences (PQS) in promoter-coding strands, initiating base excision repair (BER) by 8-oxoguanine DNA glycosylase (OGG1), yielding an abasic site (AP). The AP enables melting of the duplex to unmask the PQS, adopting a G-quadruplex fold in which apurinic/apyrimidinic endonuclease 1 (APE1) binds, but inefficiently cleaves, the AP for activation of vascular endothelial growth factor (VEGF) or endonuclease III-like protein 1 (NTHL1) genes...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28113420/full-duplex-airborne-ultrasonic-data-communication-using-a-pilot-aided-qam-ofdm-modulation-scheme
#13
Wentao Jiang, William M D Wright
Orthogonal frequency division multiplexing (OFDM) has been extensively used in a variety of broadband digital wireless communications applications because of its high bandwidth utilization efficiency and effective immunity to multipath distortion. This work has investigated quadrature amplitude modulation (QAM) and OFDM methods in aircoupled ultrasonic communication, using broadband capacitive ultrasonic transducers with high-k dielectric layers. OFDM phase noise was discussed and corrected using a pilot-aided estimation algorithm...
May 18, 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28100305/environment-directed-activation-the-escherichia-coli-flhdc-operon-by-transposons
#14
Zhongge Zhang, Chika Kukita, Mir Zafri Humayun, Milton H Saier
The flagellar system in E. coli K12 is expressed under the control of the flhDC-encoded master regulator, FlhDC. Transposition of insertion sequence (IS) elements to the upstream flhDC promoter region up-regulates transcription of this operon, resulting in more rapid motility. Wang and Wood (2011) provided evidence that insertion of IS5 into upstream activating sites occurs at higher rates in semisolid agar media in which swarming behavior is allowed as compared with liquid or solid media where swarming cannot occur...
January 17, 2017: Microbiology
https://www.readbyqxmd.com/read/28099008/critical-analysis-of-rate-constants-and-turnover-frequency-in-nucleic-acid-templated-reactions-reaching-terminal-velocity
#15
Dalu Chang, Eric Lindberg, Nicolas Winssinger
Nucleic acid-templated reactions have attracted significant attention for nucleic acid sensing and imaging. The level of signal amplification obtained from templated reactions is a function of the template turnover, wherein the template acts as the catalyst. Herein, we report the application of a pyridinium linker that immolates upon photocatalytic reduction with a ruthenium complex to yield the fastest nucleic acid templated reaction reported to date. We show that the templated reaction turnover is limited by the duplex dissociation kinetics beyond probes longer than a 6-mer and proceeded fastest for a 5-mer PNA probe...
February 1, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28094993/biophysics-of-artificially-expanded-genetic-information-systems-thermodynamics-of-dna-duplexes-containing-matches-and-mismatches-involving-2-amino-3-nitropyridin-6-one-z-and-imidazo-1-2-a-1-3-5-triazin-4-8h-one-p
#16
Xiaoyu Wang, Shuichi Hoshika, Raymond J Peterson, Myong-Jung Kim, Steven A Benner, Jason D Kahn
Synthetic nucleobases presenting non-Watson-Crick arrangements of hydrogen bond donor and acceptor groups can form additional nucleotide pairs that stabilize duplex DNA independent of the standard A:T and G:C pairs. The pair between 2-amino-3-nitropyridin-6-one 2'-deoxyriboside (presenting a {donor-donor-acceptor} hydrogen bonding pattern on the Watson-Crick face of the small component, trivially designated Z) and imidazo[1,2-a]-1,3,5-triazin-4(8H)one 2'-deoxyriboside (presenting an {acceptor-acceptor-donor} hydrogen bonding pattern on the large component, trivially designated P) is one of these extra pairs for which a substantial amount of molecular biology has been developed...
February 9, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28077881/a-pilot-study-of-penile-hemodynamics-in-men-with-penile-curvatures
#17
A A Zaazaa, I Fathy, O Ayman, A Hassanin, H Ghanem
Penile curvature (PC) is bothersome to the patient. PC is either congenital or acquired. In most of the circulatory system, blood flows in a laminar profile with minimal energy expenditure. When a fluid passes in a curved tube, the laminar profile is disturbed and changed into a turbulent flow. It increases the energy expenditure and reduces the flow. Turbulent flow may have a role in the development of an atherosclerotic plaque and in localizing its site. The aim of this research was to study penile hemodynamics before and after correction of PC...
January 12, 2017: International Journal of Impotence Research
https://www.readbyqxmd.com/read/28077560/mechanistic-insights-into-type-i-toxin-antitoxin-systems-in-helicobacter-pylori-the-importance-of-mrna-folding-in-controlling-toxin-expression
#18
Hélène Arnion, Dursun Nizam Korkut, Sara Masachis Gelo, Sandrine Chabas, Jérémy Reignier, Isabelle Iost, Fabien Darfeuille
Type I toxin-antitoxin (TA) systems have been identified in a wide range of bacterial genomes. Here, we report the characterization of a new type I TA system present on the chromosome of the major human gastric pathogen, Helicobacter pylori We show that the aapA1 gene encodes a 30 amino acid peptide whose artificial expression in H. pylori induces cell death. The synthesis of this toxin is prevented by the transcription of an antitoxin RNA, named IsoA1, expressed on the opposite strand of the toxin gene. We further reveal additional layers of post-transcriptional regulation that control toxin expression: (i) transcription of the aapA1 gene generates a full-length transcript whose folding impedes translation (ii) a 3' end processing of this message generates a shorter transcript that, after a structural rearrangement, becomes translatable (iii) but this rearrangement also leads to the formation of two stem-loop structures allowing formation of an extended duplex with IsoA1 via kissing-loop interactions...
January 10, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28074973/fluorescence-turn-on-hairpin-probe-pcr
#19
F Takei, K Nakatani
A new fluorescence turn-on type of PCR monitoring system (Hpro-PCR) using a hairpin probe and a primer having a tag sequence at the 5' end with the fluorescent molecule 2,7-diamino-1,8-naphthyridine derivative (DANP) has been developed. The Hpro-PCR exploited the modulation of the equilibrium states between the DANP-bound hairpin structure and probe-tag duplex, and the PCR progress alternated the equilibrium state, resulting in the change of fluorescent intensity.
January 11, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28073665/predictive-ability-of-the-society-for-vascular-surgery-wound-ischemia-and-foot-infection-wifi-classification-system-after-first-time-lower-extremity-revascularizations
#20
Jeremy D Darling, John C McCallum, Peter A Soden, Raul J Guzman, Mark C Wyers, Allen D Hamdan, Hence J Verhagen, Marc L Schermerhorn
OBJECTIVE: The Society for Vascular Surgery (SVS) Wound, Ischemia and foot Infection (WIfI) classification system was proposed to predict 1-year amputation risk and potential benefit from revascularization. Our goal was to evaluate the predictive ability of this scale in a real-world selection of patients undergoing a first-time lower extremity revascularization for chronic limb-threatening ischemia (CLTI). METHODS: From 2005 to 2014, 1336 limbs underwent a first-time lower extremity revascularization for CLTI, of which 992 had sufficient data to classify all three WIfI components (wound, ischemia, and foot infection)...
January 7, 2017: Journal of Vascular Surgery
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