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https://www.readbyqxmd.com/read/28881717/5-aza-2-deoxycytidine-dac-treatment-downregulates-the-hpv-e6-and-e7-oncogene-expression-and-blocks-neoplastic-growth-of-hpv-associated-cancer-cells
#1
Maximilian Stich, Lennard Ganss, Jens Puschhof, Elena-Sophie Prigge, Miriam Reuschenbach, Ana Guiterrez, Svetlana Vinokurova, Magnus von Knebel Doeberitz
High-risk human papillomaviruses (hr HPVs) may cause various human cancers and associated premalignant lesions. Transformation of the host cells is triggered by overexpression of the viral oncogenes E6 and E7 that deregulate the cell cycle and induce chromosomal instability. This process is accompanied by hypermethylation of distinct CpG sites resulting in silencing of tumor suppressor genes, inhibition of the viral E2 mediated control of E6 and E7 transcription as well as deregulated expression of host cell microRNAs...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28842761/inflammatory-response-and-peritoneal-contamination-after-transrectal-natural-orifice-specimen-extraction-nose-versus-mini-laparotomy-a-porcine-in-vivo-study
#2
Jonas D Senft, Tilman Dröscher, Philip Gath, Philip C Müller, Adrian Billeter, Beat P Müller-Stich, Georg R Linke
BACKGROUND: Transrectal natural orifice specimen extraction (NOSE) avoids abdominal organ retrieval during laparoscopic procedures and may reduce surgical trauma. However, this has not been proven clinically and transrectal peritoneal contamination is feared to cause infectious complications. This experimental study was designed to evaluate inflammatory response and peritoneal contamination after transrectal NOSE versus mini-laparotomy. METHODS: 24 German Landrace pigs underwent transrectal NOSE (N = 12) or mini-laparotomy (N = 12) for standardized extraction of water-instilled balloon...
August 25, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28840317/impact-of-visual-spatial-ability-on-laparoscopic-camera-navigation-training
#3
Paul J Roch, Henriette M Rangnick, Julia A Brzoska, Laura Benner, Karl-Friedrich Kowalewski, Philip C Müller, Hannes G Kenngott, Beat-Peter Müller-Stich, Felix Nickel
BACKGROUND: Technical limitations of minimally invasive surgery challenge both surgeons and camera assistants. Current research indicates that visual-spatial ability (VSA) has impact on learning of laparoscopic camera navigation (LCN). However, it remains unclear if complexity of LCN tasks influences the impact of VSA. The aim of this study was to examine the influence of VSA on LCN training within tasks of different complexity levels. METHODS: The present study was conducted as a monocentric prospective trial...
August 24, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28838632/the-triangle-operation-radical-surgery-after-neoadjuvant-treatment-for-advanced-pancreatic-cancer-a-single-arm-observational-study
#4
Thilo Hackert, Oliver Strobel, Christoph W Michalski, André L Mihaljevic, Arianeb Mehrabi, Beat Müller-Stich, Christoph Berchtold, Alexis Ulrich, Markus W Büchler
BACKGROUND: Neoadjuvant therapy is an important strategy for locally advanced pancreatic cancer (PDAC) as resection rates increase with modern chemotherapy regimens even in patients with arterial tumor encasement. The aim of this study is the description of technique and initial outcomes of a new type of radical and arterial-sparing resection after neoadjuvant treatment for locally advanced PDAC. METHODS: The surgical technique and perioperative results of a new type of operation are described, comprising radical tumor removal by sharp dissection along the celiac axis and the superior mesenteric artery with complete dissection of all soft tissue between both - arteries and superior mesenteric/portal vein (TRIANGLE operation)...
August 21, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/28834793/surgical-ventricular-remodeling-should-we-stich-or-not
#5
Vivek Rao
PURPOSE OF REVIEW: The surgical management of patients with ischemic cardiomyopathy, especially those with left ventricular ejection fractions less than 20% has historically been controversial. The original trials of surgical revascularization versus medical therapy intentionally excluded those patients with an ejection fraction less than 35%. The significant advances in medical therapy for heart failure over the past 30 years (β-blockade, angiotensin converting enzyme inhibitors, internal cardiac defibrillator and so on) also mandated a reevaluation of the potential benefits of surgical revascularization in this high-risk subset...
August 22, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28801721/surgery-is-essential-in-squamous-cell-cancer-of-the-rectum
#6
D C Steinemann, P C Müller, A T Billeter, T Bruckner, A Ulrich, B P Müller-Stich
PURPOSE: Squamous cell cancer (SCC) is a rare histological subtype of rectal cancer. It is unclear whether SCC should be treated by multimodal therapy, including surgery, or by chemoradiation alone. The objective of the study was to define an optimal treatment strategy. METHODS: Patients with rectal cancer and SCC histology were identified in the Surveillance Epidemiology and End Results Database between 1990 and 2013. According to treatment, three groups were defined: radiotherapy and surgery (RT/SX), radiotherapy (RT), and surgery (SX)...
August 11, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28801083/halsted-s-see-one-do-one-and-teach-one-versus-peyton-s-four-step-approach-a-randomized-trial-for-training-of-laparoscopic-suturing-and-knot-tying
#7
Philipp Romero, Patrick Gu Nther, Karl-Friedrich Kowalewski, Mirco Friedrich, Mona W Schmidt, Sarah M Trent, Javier R De La Garza, Beat P Mu Ller-Stich, Felix Nickel
BACKGROUND: This study aimed to compare the effectiveness of Halsted's method "see one, do one, and teach one" with Peyton's Four-Step Approach for teaching intracorporal suturing and knot tying (ICKT). METHODS: Laparoscopically naïve medical students (n = 60) were randomized to teaching of ICKT with either Halsted's (n = 30) or Peyton's method (n = 30) for 60 minutes. Each student's first 3 and final sutures were evaluated using Objective Structured Assessment of Technical Skills (OSATS), procedural implementation, knot quality, total time, and suture placement accuracy...
August 8, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28800388/rapid-access-to-nanographenes-and-fused-heteroaromatics-by-palladium-catalyzed-annulative-%C3%AF-extension-reaction-of-unfunctionalized-aromatics-with-diiodobiaryls
#8
Wataru Matsuoka, Hideto Ito, Kenichiro Itami
Efficient and rapid access to nanographenes and π-extended fused heteroaromatics is important in materials science. Here we report a Pd-catalyzed efficient one-step annulative π-extension (APEX) reaction of PAHs and heteroaromatics, producing various π-extended aromatics. In the presence of a cationic Pd complex, triflic acid, silver pivalate, and diiodobiaryls, diverse unfunctionalized PAHs and heteroaromatics were directly transformed into larger PAHs, nanographenes, and π-extended fused heteroaromatics in a single step...
August 11, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28799061/transrectal-rigid-hybrid-notes-cholecystectomy-can-be-performed-without-peritoneal-contamination-a-controlled-porcine-survival-study
#9
Philip C Müller, Jonas D Senft, Philip Gath, Daniel C Steinemann, Felix Nickel, Adrian T Billeter, Beat P Müller-Stich, Georg R Linke
BACKGROUND AND STUDY AIMS: The risk of infectious complications due to peritoneal contamination is a major concern and inhibits the widespread use of transrectal NOTES. A standardized rectal washout with a reversible colon occlusion device in situ has previously shown potential in reducing peritoneal contamination. The aim of this study was to compare the peritoneal contamination rate and inflammatory reaction for transrectal cholecystectomy after ideal rectal preparation (trCCE) and standard laparoscopic cholecystectomy (lapCCE) in a porcine survival experiment...
August 10, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28797088/csf-profile-in-primary-progressive-multiple-sclerosis-re-exploring-the-basics
#10
Ahmed Abdelhak, Tilman Hottenrott, Christoph Mayer, Gudrun Hintereder, Uwe K Zettl, Oliver Stich, Hayrettin Tumani
OBJECTIVE: The aim of this study was to report the basic cerebrospinal fluid (CSF) profile in patients with primary progressive multiple sclerosis (PPMS). METHODS: The results of CSF analysis from 254 patients with PPMS were collected at four university hospitals in Germany. Routine CSF parameters and different indices of intrathecal immunoglobulin synthesis were evaluated. We assessed possible correlations between the various CSF parameters and the expanded disability status scale (EDSS) both at the time of lumbar puncture and during the course of the disease...
2017: PloS One
https://www.readbyqxmd.com/read/28753045/an-internet-based-survey-of-96-german-speaking-users-of-bath-salts-frequent-complications-risky-sexual-behavior-violence-and-delinquency
#11
Sabrina Schmoll, Katrin Romanek, Raphael Stich, Elias Bekka, Jochen Stenzel, Stefanie Geith, Florian Eyer, Christian Rabe
OBJECTIVE: To define the demographics of German-speaking "bath salt" users. DESIGN: Prospective web-based survey of volunteer users of "bath salts". Subject recruitment/exclusion: Participation was solicited by posts in web forums frequented by users of synthetic cathinones. An invitation to participate was also disseminated via regional drug information centers. Responses were discarded if participants refused data analysis, provided incomplete surveys, were under 18 years of age (five cases), and in case of clearly improbable answers (i...
July 28, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28722637/schistosomiasis-in-european-travelers-and-migrants-analysis-of-14-years-tropnet-surveillance-data
#12
Tilman Lingscheid, Florian Kurth, Jan Clerinx, Stefania Marocco, Begoña Trevino, Mirjam Schunk, José Muñoz, Ida E Gjørup, Tomas Jelinek, Michel Develoux, Graham Fry, Thomas Jänisch, Matthias L Schmid, Olivier Bouchaud, Sabino Puente, Lorenzo Zammarchi, Kristine Mørch, Anders Björkman, Heli Siikamäki, Andreas Neumayr, Henrik Nielsen, Urban Hellgren, Malgorzata Paul, Guido Calleri, Pavel Kosina, Bjørn Myrvang, José M Ramos, Gudrun Just-Nübling, Anna Beltrame, José Saraiva da Cunha, Peter Kern, Laurence Rochat, August Stich, Peter Pongratz, Martin P Grobusch, Norbert Suttorp, Martin Witzenrath, Christoph Hatz, Thomas Zoller, TropNet Schistosomiasis Investigator Group
Schistosomiasis remains one of the most prevalent parasitic diseases worldwide and the infection is frequently found in travelers and migrants. The European Network for Tropical Medicine and Travel Health conducted a sentinel surveillance study on imported schistosomiasis between 1997 and 2010. This report summarizes epidemiological and clinical data from 1,465 cases of imported schistosomiasis. Direct pathogen detection and serology were the main diagnostic tools applied. Of these, 486 (33%) cases were identified among European travelers, 231 (16%) among long-term expatriates, and 748 (51%) among non-European immigrants...
August 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28721564/foreword-focus-on-polyphenols
#13
EDITORIAL
Veronique Cheynier, Heidi Halbwirth, Karl Stich, Stefan Martens
No abstract text is available yet for this article.
August 2017: Planta
https://www.readbyqxmd.com/read/28715171/limitations-of-structural-superlubricity-chemical-bonds-versus-contact-size
#14
Dirk Dietzel, Ján Brndiar, Ivan Štich, André Schirmeisen
Structural superlubricity describes the state of virtually frictionless sliding if two atomically flat interfaces are incommensurate, that is, they share no common periodicity. Despite the exciting prospects of this low friction phenomenon, there are physical limitations to the existence of this state. Theory predicts that the contact size is one fundamental limit, where the critical size threshold mainly depends on the interplay between lateral contact compliance and interface interaction energies. Here we provide experimental evidence for this size threshold by measuring the sliding friction force of differently sized antimony particles on MoS2...
August 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28712303/mn-ii-oxidation-by-the-multicopper-oxidase-complex-mnx-a-coordinated-two-stage-mn-ii-iii-and-mn-iii-iv-mechanism
#15
Alexandra V Soldatova, Christine A Romano, Lizhi Tao, Troy A Stich, William H Casey, R David Britt, Bradley M Tebo, Thomas G Spiro
The bacterial manganese oxidase MnxG of the Mnx protein complex is unique among multicopper oxidases (MCOs) in carrying out a two-electron metal oxidation, converting Mn(II) to MnO2 nanoparticles. The reaction occurs in two stages: Mn(II) → Mn(III) and Mn(III) → MnO2. In a companion study , we show that the electron transfer from Mn(II) to the low-potential type 1 Cu of MnxG requires an activation step, likely forming a hydroxide bridge at a dinuclear Mn(II) site. Here we study the second oxidation step, using pyrophosphate (PP) as a Mn(III) trap...
August 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28712284/mn-ii-oxidation-by-the-multicopper-oxidase-complex-mnx-a-binuclear-activation-mechanism
#16
Alexandra V Soldatova, Lizhi Tao, Christine A Romano, Troy A Stich, William H Casey, R David Britt, Bradley M Tebo, Thomas G Spiro
The bacterial protein complex Mnx contains a multicopper oxidase (MCO) MnxG that, unusually, catalyzes the two-electron oxidation of Mn(II) to MnO2 biomineral, via a Mn(III) intermediate. Although Mn(III)/Mn(II) and Mn(IV)/Mn(III) reduction potentials are expected to be high, we find a low reduction potential, 0.38 V (vs Normal Hydrogen Electrode, pH 7.8), for the MnxG type 1 Cu(2+), the electron acceptor. Indeed the type 1 Cu(2+) is not reduced by Mn(II) in the absence of molecular oxygen, indicating that substrate oxidation requires an activation step...
August 15, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28707392/stable-coronary-artery-disease-and-left-ventricular-dysfunction-the-role-of-revascularization
#17
Baran Aksut, Randall Starling, Samir Kapadia
The aim of this review is to present existing evidence of revascularization in patients with stable coronary artery disease (CAD) and left ventricular (LV) dysfunction. A literature review was performed for trials studying revascularization, via CABG or PCI, in patients with CAD and LV dysfunction. Pivotal, high-quality trials have investigated revascularization with CABG in stable CAD and LV dysfunction. CASS demonstrated improved 10-year survival in the surgical group compared to medically treated patients...
July 14, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28698054/bistacrines-as-potential-antitrypanosomal-agents
#18
Ines Schmidt, Sarah Göllner, Antje Fuß, August Stich, Anna Kucharski, Tanja Schirmeister, Elena Katzowitsch, Heike Bruhn, Alexandra Miliu, R Luise Krauth-Siegel, Ulrike Holzgrabe
Human African Trypanosomiasis (HAT) is caused by two subspecies of the genus Trypanosoma, namely Trypanosoma brucei rhodesiense and Trypanosoma brucei gambiense. The disease is fatal if left untreated and therapy is limited due to only five non-adequate drugs currently available. In preliminary studies, dimeric tacrine derivatives were found to inhibit parasite growth with IC50-values in the nanomolar concentration range. This prompted the synthesis of a small, but smart library of monomeric and dimeric tacrine-type compounds and their evaluation of antiprotozoal activity...
August 15, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28691147/gastric-bypass-simultaneously-improves-adipose-tissue-function-and-insulin-dependent-type-2-diabetes-mellitus
#19
Adrian T Billeter, Spiros Vittas, Barbara Israel, Katharina M Scheurlen, Asa Hidmark, Thomas H Fleming, Stefan Kopf, Markus W Büchler, Beat P Müller-Stich
OBJECTIVE: The underlying causes of type 2 diabetes (T2DM) remain poorly understood. Adipose tissue dysfunction with high leptin, inflammation, and increased oxidative stress may play a pivotal role in T2DM development in obese patients. Little is known about the changes in the adipose tissue after Roux-Y gastric bypass (RYGB) in non-severely obese patients (BMI < 35 kg/m(2)) and since these patients have more T2DM-associated complications than obese patients ("obesity paradox"), we investigated changes in adipose tissue function in a cohort of BMI <35 kg/m(2) with insulin-dependent T2DM after RYGB surgery which resolves T2DM...
July 9, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28634842/evaluation-of-open-and-minimally-invasive-adrenalectomy-a-systematic-review-and-network-meta-analysis
#20
Patrick Heger, Pascal Probst, Felix J Hüttner, Käthe Gooßen, Tanja Proctor, Beat P Müller-Stich, Oliver Strobel, Markus W Büchler, Markus K Diener
BACKGROUND: Adrenalectomy can be performed via open and various minimally invasive approaches. The aim of this systematic review was to summarize the current evidence on surgical techniques of adrenalectomy. METHODS: Systematic literature searches (MEDLINE, EMBASE, Web of Science, Cochrane Library) were conducted to identify randomized controlled trials (RCTs) and controlled clinical trials (CCTs) comparing at least two surgical procedures for adrenalectomy. Statistical analyses were performed, and meta-analyses were conducted...
June 20, 2017: World Journal of Surgery
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