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Xiaoqin Zhong, Liang Qiao, Géraldine Stauffer, Baohong Liu, Hubert H Girault
A polyimide microfluidic chip with a microhole emitter (Ø 10-12 μm) created on top of a microchannel by scanning laser ablation has been designed for nanoelectrospray ionization (spyhole-nanoESI) to couple microfluidics with mass spectrometry. The spyhole-nanoESI showed higher sensitivity compared to standard ESI and microESI from the end of the microchannel. The limits of detection (LOD) for peptide with the spyhole-nanoESI MS reached 50 pM, which was 600 times lower than that with standard ESI. The present microchip emitter allows the analysis of small volumes of samples...
March 20, 2018: Journal of the American Society for Mass Spectrometry
Anthony T Ginnetti, Daniel V Paone, Shaun R Stauffer, Craig M Potteiger, Anthony W Shaw, James Deng, James J Mulhearn, Diem N Nguyen, Carolyn Segerdell, Juliana Anquandah, Amy Calamari, Gong Cheng, Michael D Leitl, Annie Liang, Eric Moore, Jacqueline Panigel, Mark Urban, Jixin Wang, Kerry Fillgrove, Cuyue Tang, Sean Cook, Stefanie Kane, Christopher A Salvatore, Samuel L Graham, Christopher S Burgey
A second-generation small molecule P2X3 receptor antagonist has been developed. The lead optimization strategy to address shortcomings of the first-generation preclinical lead compound is described herein. These studies were directed towards the identification and amelioration of preclinical hepatobiliary findings, reducing potential for drug-drug interactions, and decreasing the projected human dose of the first-generation lead.
February 21, 2018: Bioorganic & Medicinal Chemistry Letters
Munveer S Bhangoo, Brian Cheng, Gregory P Botta, Phataraporn Thorson, Michael P Kosty
As with other genitourinary malignancies, a variety of paraneoplastic syndromes have been revealed to occur in patients with prostate cancer. Stauffer's Syndrome is a well-described clinical syndrome which manifests via intrahepatic cholestasis in patients with renal cell carcinoma. Less common is intrahepatic cholestasis occurring in association with prostate cancer. The current case report discusses a 67-year-old man presenting with liver failure secondary to intrahepatic cholestasis co-existing with metastatic prostate adenocarcinoma...
April 2018: Molecular and Clinical Oncology
W R Stauffer
Phasic dopamine responses demonstrate remarkable simplicity; they code for the differences between received and predicted reward values. Yet this simplicity belies the subtle complexity of the psychological, computational, and contextual factors that influence this signal. Advances in behavioral paradigms and models, in monkeys and rodents, have demonstrated that phasic dopamine responses reflect numerous behavioral computations and factors including choice, subjective value, confidence, and context. The application of optogenetics has provided evidence that dopamine reward prediction error responses cause value learning...
March 2, 2018: Current Opinion in Neurobiology
Klas Tybrandt, Dion Khodagholy, Bernd Dielacher, Flurin Stauffer, Aline F Renz, György Buzsáki, János Vörös
Electrical interfacing with neural tissue is key to advancing diagnosis and therapies for neurological disorders, as well as providing detailed information about neural signals. A challenge for creating long-term stable interfaces between electronics and neural tissue is the huge mechanical mismatch between the systems. So far, materials and fabrication processes have restricted the development of soft electrode grids able to combine high performance, long-term stability, and high electrode density, aspects all essential for neural interfacing...
February 28, 2018: Advanced Materials
Michael J Bartel, Ruchir Puri, Bhaumik Brahmbhatt, Wei-Chung Chen, Daniel Kim, Carlos Roberto Simons-Linares, John A Stauffer, Mauricia A Buchanan, Steven P Bowers, Timothy A Woodward, Michael B Wallace, Massimo Raimondo, Horacio J Asbun
This article was updated to correct the author listing for Carlos Roberto Simons-Linares.
February 21, 2018: Surgical Endoscopy
F Stauffer, V Vanhoorne, G Pilcer, P-F Chavez, S Rome, M A Schubert, L Aerts, T De Beer
Active Pharmaceutical Ingredients (API) raw material variability is not always thoroughly considered during pharmaceutical process development, mainly due to low quantities of drug substance available. However, synthesis, crystallization routes and production sites evolve during product development and product life cycle leading to changes in physical material attributes which can potentially affect their processability. Recent literature highlights the need for a global approach to understand the link between material synthesis, material variability, process and product quality...
February 13, 2018: European Journal of Pharmaceutics and Biopharmaceutics
V K Stauffer, M M Luedi, P Kauf, M Schmid, M Diekmann, K Wieferich, B Schnüriger, D Doll
We systematically searched available databases. We reviewed 6,143 studies published from 1833 to 2017. Reports in English, French, German, Italian, and Spanish were considered, as were publications in other languages if definitive treatment and recurrence at specific follow-up times were described in an English abstract. We assessed data in the manner of a meta-analysis of RCTs; further we assessed non-RCTs in the manner of a merged data analysis. In the RCT analysis including 11,730 patients, Limberg & Dufourmentel operations were associated with low recurrence of 0...
February 15, 2018: Scientific Reports
Michael J Bartel, Ruchir Puri, Bhaumik Brahmbhatt, Wei-Chung Chen, Daniel Kim, Carlos Roberto Simons-Linares, John A Stauffer, Mauricia A Buchanan, Steven P Bowers, Timothy A Woodward, Michael B Wallace, Massimo Raimondo, Horacio J Asbun
BACKGROUND: Sporadic nonampullary duodenal neoplasms (SNADN) can have malignant potential for which endoscopic and surgical resections are offered. We report combined gastroenterologic and surgical experience for treatment of SNADN, including endoscopic mucosal resection (EMR) and pancreas-preserving partial duodenectomy (PPPD). METHODS: We retrospectively reviewed 121 consecutive patients, who underwent 30 PPPDs and 91 EMRs for mucosal and submucosal SNADN. Decision to undergo EMR or surgical resection was based on expert endoscopist and surgeon discretion including multidisciplinary tumor board review...
February 1, 2018: Surgical Endoscopy
Markus Schmid, Patrick Ernst, Annemarie Honegger, Maarit Suomalainen, Martina Zimmermann, Lukas Braun, Sarah Stauffer, Cristian Thom, Birgit Dreier, Matthias Eibauer, Anja Kipar, Viola Vogel, Urs F Greber, Ohad Medalia, Andreas Plückthun
Most systemic viral gene therapies have been limited by sequestration and degradation of virions, innate and adaptive immunity, and silencing of therapeutic genes within the target cells. Here we engineer a high-affinity protein coat, shielding the most commonly used vector in clinical gene therapy, human adenovirus type 5. Using electron microscopy and crystallography we demonstrate a massive coverage of the virion surface through the hexon-shielding scFv fragment, trimerized to exploit the hexon symmetry and gain avidity...
January 31, 2018: Nature Communications
Erin Hammett, Susan Veldheer, Shari Hrabovsky, Jessica Yingst, Arthur Berg, Erika Poole, Dana Stauffer, Jonathan Foulds
No abstract text is available yet for this article.
January 25, 2018: Journal of Hospital Medicine: An Official Publication of the Society of Hospital Medicine
Elie Nader, Nicolas Guillot, Louis Lavorel, Ivan Hancco, Romain Fort, Emeric Stauffer, Céline Renoux, Philippe Joly, Michèle Germain, Philippe Connes
We compared the effects of cycling and running exercise on hemorheological and hematological properties, as well as eryptosis markers. Seven endurance-trained subjects randomly performed a progressive and maximal exercise test on a cycle ergometer and a treadmill. Blood was sampled at rest and at the end of the exercise to analyze hematological and blood rheological parameters including hematocrit (Hct), red blood cell (RBC) deformability, aggregation and blood viscosity. Hemoglobin saturation (SpO2), blood lactate and glucose levels were also monitored...
January 21, 2018: Scandinavian Journal of Medicine & Science in Sports
Fabiola Aguilera, Levan Tsamalaidze, Massimo Raimondo, Ruchir Puri, Horacio J Asbun, John A Stauffer
BACKGROUND/AIMS: The operative management of groove pancreatitis (GP) is still a matter of controversy and pancreaticoduodenectomy (PD) can be a high-risk procedure for patients. The aim of this study was to report our 9-year experience of surgical resection for GP and to review relevant literature. METHODS: A retrospective review of patients undergoing pancreatectomy for GP from August 1, 2008, through May 31, 2017 was performed. Patients with clinical, radiologic, and final pathologic confirmation of GP were included...
January 18, 2018: Digestive Surgery
Diego A Arroyo, Sara Schukraft, Zacharenia Kallinikou, Jean-Christophe Stauffer, Gérard Baeriswyl, Jean-Jacques Goy, Mario Togni, Stéphane Cook, Serban Puricel
Aims: To compare endothelium-dependent vasomotor function and vascular healing 15 months after implantation of two new-generation drug-eluting stents and biovascular scaffolds (BVS). Methods and results: A total of 28 patients previously treated with a SYNERGY stent (bioabsorbable polymer everolimus-eluting stents (BP-EES)), a PROMUS stent (persistent polymer everolimus-eluting stents (PP-EES)) or an ABSORB (BVS) underwent control coronary angiography, 15 months after implantation, coupled with optical coherence tomography imaging and supine bicycle exercise...
2018: Open Heart
Flurin Stauffer, Moritz Thielen, Christina Sauter, Séverine Chardonnens, Simon Bachmann, Klas Tybrandt, Christian Peters, Christofer Hierold, Janos Vörös
Preparation-free and skin compliant biopotential electrodes with high recording quality enable wearables for future healthcare and the Internet of Humans. Here, super-soft and self-adhesive electrodes are presented for use on dry and hairy skin without skin preparation or attachment pressure. The electrodes show a skin-contact impedance of 50 kΩ cm2 at 10 Hz that is comparable to clinical standard gel electrodes and lower than existing dry electrodes. Microstructured electrodes inspired by grasshopper feet adhere repeatedly to the skin with a force of up to 0...
January 13, 2018: Advanced Healthcare Materials
Tarissa Mitchell, Deborah Lee, Michelle Weinberg, Christina Phares, Nicola James, Kittisak Amornpaisarnloet, Lalita Aumpipat, Gretchen Cooley, Anita Davies, Valerie Daw Tin Shwe, Vasil Gajdadziev, Olga Gorbacheva, Chutharat Khwan-Niam, Alexander Klosovsky, Waritorn Madilokkowit, Diana Martin, Naing Zaw Htun Myint, Thi Ngoc Yen Nguyen, Thomas B Nutman, Elise M O'Connell, Luis Ortega, Sugunya Prayadsab, Chetdanai Srimanee, Wasant Supakunatom, Vattanachai Vesessmith, William M Stauffer
With an unprecedented number of displaced persons worldwide, strategies for improving the health of migrating populations are critical. United States-bound refugees undergo a required overseas medical examination to identify inadmissible conditions (e.g., tuberculosis) 2-6 months before resettlement, but it is limited in scope and may miss important, preventable infectious, chronic, or nutritional causes of morbidity. We sought to evaluate the feasibility and health impact of diagnosis and management of such conditions before travel...
December 18, 2017: American Journal of Tropical Medicine and Hygiene
Kathryn M Rothenhoefer, William R Stauffer
No abstract text is available yet for this article.
December 26, 2017: Proceedings of the National Academy of Sciences of the United States of America
Lisa H Lancaster, Joao A de Andrade, Joseph D Zibrak, Maria L Padilla, Carlo Albera, Steven D Nathan, Marlies S Wijsenbeek, John L Stauffer, Klaus-Uwe Kirchgaessler, Ulrich Costabel
Pirfenidone is one of two approved therapies for the treatment of idiopathic pulmonary fibrosis (IPF). Randomised controlled clinical trials and subsequent post hoc analyses have demonstrated that pirfenidone reduces lung function decline, decreases mortality and improves progression-free survival. Long-term extension trials, registries and real-world studies have also shown similar treatment effects with pirfenidone. However, for patients with IPF to obtain the maximum benefits of pirfenidone treatment, the potential adverse events (AEs) associated with pirfenidone need to be managed...
December 31, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
Francisco V Santos, Gaspar R Chiappa, Sergio Henrique Rodolpho Ramalho, Alexandra Correa Gervazoni Balbuena de Lima, Fausto Stauffer Junqueira de Souza, Lawrence P Cahalin, João Luiz Quagliotti Durigan, Isac de Castro, Gerson Cipriano
Recent literature suggests that resistance training (RT) improves peak oxygen uptake ([Formula: see text] peak), similarly to aerobic exercise (AE) in patients with heart failure (HF), but its effect on cardiac remodeling is controversial. Thus, we examined the effects of RT and AE on [Formula: see text] peak and cardiac remodeling in patients with heart failure (HF) via a systematic review and meta-analysis. MEDLINE, EMBASE, Cochrane Library and CINAHL, AMEDEO and PEDro databases search were extracted study characteristics, exercise type, and ventricular outcomes...
January 2018: Heart Failure Reviews
Shahram Saberi, Jennifer E Stauffer, Jie Jiang, Sandra Diaz Garcia, Amy E Taylor, Derek Schulte, Takuya Ohkubo, Cheyenne L Schloffman, Marcus Maldonado, Michael Baughn, Maria J Rodriguez, Don Pizzo, Don Cleveland, John Ravits
Hexanucleotide repeat expansions in C9orf72 are the most common genetic cause of amyotrophic lateral sclerosis (C9 ALS). The main hypothesized pathogenic mechanisms are C9orf72 haploinsufficiency and/or toxicity from one or more of bi-directionally transcribed repeat RNAs and their dipeptide repeat proteins (DPRs) poly-GP, poly-GA, poly-GR, poly-PR and poly-PA. Recently, nuclear import and/or export defects especially caused by arginine-containing poly-GR or poly-PR have been proposed as significant contributors to pathogenesis based on disease models...
March 2018: Acta Neuropathologica
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