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Elisabetta Alberico, Alastair J J Lennox, Lydia K Vogt, Haijun Jiao, Wolfgang Baumann, Hans-Joachim Drexler, Martin Nielsen, Anke Spannenberg, Marek P Checinski, Henrik Junge, Matthias Beller
Ruthenium PNP complex 1a (RuH(CO)Cl(HN(C2H4Pi-Pr2)2)) represents a state-of-the-art catalyst for low-temperature (<100 °C) aqueous methanol dehydrogenation to H2 and CO2. Herein, we describe an investigation that combines experiment, spectroscopy and theory to provide a mechanistic rationale for this process. During catalysis, the presence of two anionic resting states was revealed, Ru-dihydride (3-) and Ru-monohydride (4-) that are deprotonated at nitrogen in the pincer ligand backbone. DFT calculations showed that O- and CH- coordination modes of methoxide to ruthenium compete, and form complexes 4- and 3-, respectively...
October 19, 2016: Journal of the American Chemical Society
Giovanni Mauri, Lorenzo C Pescatori, Chiara Mattiuz, Dario Poretti, Vittorio Pedicini, Fabio Melchiorre, Umberto Rossi, Luigi Solbiati, Luca Maria Sconfienza
OBJECTIVES: To present the results of our experience with cyanoacrylic glue percutaneous injection to treat post-surgical non-healing enteric fistulae after failure of standard treatments. METHODS: Eighteen patients (14 males; age range 33-84, mean 69 years) were treated for a non-healing post-surgical enteric fistula after failure of standard treatments. Under computed tomography and/or fluoroscopic guidance, a mixture of cyanoacrylic glue (Glubran 2, GEM, Viareggio, Italy) and ethiodized oil was injected at the site of the fistula...
October 17, 2016: La Radiologia Medica
Kirsten A M White, Li Luo, Todd A Thompson, Salina Torres, Chien-An Andy Hu, Nancy E Thomas, Jenna Lilyquist, Hoda Anton-Culver, Stephen B Gruber, Lynn From, Klaus J Busam, Irene Orlow, Peter A Kanetsky, Loraine D Marrett, Richard P Gallagher, Lidia Sacchetto, Stefano Rosso, Terence Dwyer, Anne E Cust, Colin B Begg, Marianne Berwick
Autophagy has been linked with melanoma risk and survival, but no polymorphisms in autophagy-related (ATG) genes have been investigated in relation to melanoma progression. We examined five single-nucleotide polymorphisms (SNPs) in three ATG genes (ATG5; ATG10; and ATG16L) with known or suspected impact on autophagic flux in an international population-based case-control study of melanoma. DNA from 911 melanoma patients was genotyped. An association was identified between (GG) (rs2241880) and earlier stage at diagnosis (OR 0...
October 17, 2016: Cancer Medicine
Jiwei Wang, Shichang Lv, Haifeng Chen, Min Shi, Jun Zhang
We have investigated the ligand effect on the gold-activated intramolecular amidiniumation of formamidine having a terminal alkyne, and observed the transformation of vinyl gold species into a gem-digold intermediate comprising two C-Au σ bonds, which represents a new binding mode for gem-digold species in the gold-promoted transformation of alkynes.
October 17, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Olubode A Olufajo, Gally Reznor, Stuart R Lipsitz, Zara R Cooper, Adil H Haider, Ali Salim, Erika L Rangel
BACKGROUND: The risk of mortality after emergency general surgery (EGS) in elderly patients is prolonged beyond initial hospitalization. Our objective was to develop a preoperative scoring tool to quantify risk of 1-year mortality. METHODS: Three hundred ninety EGS patients aged 70 years or more were analyzed. Risk factors for 1-year mortality were identified using stepwise-forward logistic multivariate regression and weights assigned using natural logarithm of odds ratios...
September 3, 2016: American Journal of Surgery
Paul F Lambert
Genetically engineered mice (GEMs) have provided valuable insights into the carcinogenic properties of various human tumor viruses, which, in aggregate, are etiologically associated with over 15% of all human cancers. This review provides an overview of seminal discoveries made through the use of GEM models for human DNA tumor viruses. Emphasis is placed on the discoveries made in the study of human papillomaviruses, Merkel cell carcinoma-associated polyomavirus, Epstein-Barr virus, and Kaposi's sarcoma-associated herpesvirus, because GEMs have contributed extensively to our understanding of how these DNA tumor viruses directly contribute to human cancers...
September 29, 2016: Annual Review of Virology
Julie Bonigen, Christine Raynaud-Donzel, José Hureaux, Nora Kramkimel, Astrid Blom, Géraldine Jeudy, Anne-Laure Breton, Thomas Hubiche, Christophe Bedane, Delphine Legoupil, Anne Pham-Ledard, Julie Charles, Maurice Pérol, Emilie Gérard, Patrick Combemale, Daphné Bonnet, Michèle-Léa Sigal, Emmanuel Mahé
Nivolumab (Opdivo(®) ), pembrolizumab (Keytruda(®) ), atezolizumab, and pidilizumabab are anti-PD1 monoclonal antibodies. Nivolumab is licensed in advanced melanoma and second-line therapy of advanced or metastatic non-small cell lung cancer. When activated, the programmed cell death (PD)-1 is implicated in the inhibition of the immune system. Anti-PD1 removes this inhibition and allows the immune system to control tumour cell progression.(1-4) Immune-mediated toxicity of this treatment have been reported, either organ-specific toxicities - i...
October 14, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
Minju Joy, Kajal Chakraborty, Vamshi Krishna Raola
Marine bivalves occupy a leading share in the total edible molluscs at the coastline regions of south-eastern Asia, and are found to possess significant nutritional and biological potential. Various in vitro evaluation (antioxidant and anti-inflammatory) guided purification of ethyl acetate-methanol (EtOAc-MeOH) extract of bivalve clam, Paphia malabarica characterised two new sterol derivatives as 23-gem-dimethylcholesta-5-en-3β-ol (1) and (22E)-24(1),24(2)-methyldihomocholest-5,22-dien-3β-ol (2) collected from the south-west coast of Arabian Sea...
October 13, 2016: Natural Product Research
Elena Fernández, Ana B Cuenca, Enrico La Cascia
The stereocontrol on the synthesis of all-carbon tetrasubstituted alkenes can be achieved by the use of gem-silaborated structures that perform selective silicon based or boron based cross-coupling strategies. The straightforward access to gem-silaborated olefins, from ketones and HC(Bpin)2(SiMe3), is based on the strategic B-O olefination outcome. Selective iododesilylation results in a strategic issue to accomplish the target C-Si cross coupling, and opens the door to the stereoselective preparation tetra-substituted olefins, exemplified here by the synthesis of Tamoxifen...
October 13, 2016: Chemistry: a European Journal
Yao Wang, Ping Huang, Minxi Hu, Wei Huang, Xinyuan Zhu, Deyue Yan
The distinct and complementary biochemical mechanisms of folic acid analog methotrexate (MTX) and cytidine analog gemcitabine (GEM) make their synergistic combination effectively. Unfortunately, such a combination faces severe pharmacokinetic problems and several transportation barriers. To overcome these problems, a new strategy of amphiphilic small molecule prodrug (ASMP) is developed to improve their synergistic combination effect. The ASMP was prepared by the amidation of the hydrophilic GEM with the hydrophobic MTX at a fixed ratio...
October 10, 2016: Bioconjugate Chemistry
Vikas Belamkar, Andrew D Farmer, Nathan T Weeks, Scott R Kalberer, William J Blackmon, Steven B Cannon
For species with potential as new crops, rapid improvement may be facilitated by new genomic methods. Apios (Apios americana Medik.), once a staple food source of Native American Indians, produces protein-rich tubers, tolerates a wide range of soils, and symbiotically fixes nitrogen. We report the first high-quality de novo transcriptome assembly, an expression atlas, and a set of 58,154 SNP and 39,609 gene expression markers (GEMs) for characterization of a breeding collection. Both SNPs and GEMs identify six genotypic clusters in the collection...
October 10, 2016: Scientific Reports
Diyu Huang, Jie Fang, Gaojian Luo
PURPOSE: The aim of this study is to assess the efficacy and safety of combination chemotherapy with gemcitabine (GEM) and cisplatin (CIS) compared with GEM alone in patients with pancreatic cancer. METHODS: A computerized search through electronic databases, including PubMed (until February 2016), was performed to obtain eligible randomized controlled trials that compared effectiveness of GEM and CIS combination chemotherapy with GEM alone in patients with pancreatic cancer...
October 2016: Journal of Cancer Research and Therapeutics
Gui Yong-Xian, Li Xiao-Huan, Zhang Fan, Tian Guo-Fang
AIM: The aim of the study is to investigate the underlying molecular mechanisms by which gemcitabine (gem) inhibits proliferation and induces apoptosis in human pancreatic cancer PANC-1 cells in vitro. MATERIALS AND METHODS: After PANC-1 cells had been treated by indicated concentration (0, 5, and 25 mg/L) of gem for 48 h, cell proliferation was evaluated by 3'-(4, 5 dimethyl-thiazol-2-yl)-2, 5-diphenyl tetrazolium bromide assay; cell morphology was observed by transmission electron microscopy; Expression of c-IAP2 and Bcl-2 proteins was analyzed by Western blot; the activity of caspase-3 and -9 was detected by spectrophotometry...
October 2016: Journal of Cancer Research and Therapeutics
Toshinori Ozaki, Mizuyo Nakamura, Takehiro Ogata, Meijie Sang, Hiroyuki Yoda, Kiriko Hiraoka, Meixiang Sang, Osamu Shimozato
Recently, we have described that siRNA-mediated silencing of runt-related transcription factor 2 (RUNX2) improves anti-cancer drug gemcitabine (GEM) sensitivity of p53-deficient human pancreatic cancer AsPC-1 cells through the augmentation of p53 family TAp63-dependent cell death pathway. In this manuscript, we have extended our study to p53-mutated human pancreatic cancer Panc-1 cells. According to our present results, knockdown of mutant p53 alone had a marginal effect on GEM-mediated cell death of Panc-1 cells...
October 4, 2016: Oncotarget
Peter A Campochiaro, Andreas K Lauer, Elliott H Sohn, Tahreem A Mir, Stuart Naylor, Matthew C Anderton, Michelle Kelleher, Richard Harrop, Scott Ellis, Kyriacos A Mitrophanous
Neovascular age-related macular degeneration (NVAMD) is a prevalent cause of vision loss. Intraocular injections of VEGF-neutralizing proteins provide benefit, but many patients require frequent injections for a prolonged period. Benefits are often lost over time due to lapses in treatment. New treatments that sustain anti-angiogenic activity are needed. This study tested the safety and expression profile of a lentiviral Equine Infectious Anemia Virus (EIAV) vector expressing endostatin and angiostatin (RetinoStat(®))...
September 26, 2016: Human Gene Therapy
Wichan Kanchanatawan, Jatupon Kongtharvonskul, Gem Dorjiee, Sunikom Suppauksorn, Umpire Pornvoranunt, Pongsakorn Karchana
In arthroscopic tissue repair, the final step is achieving adequate tissue approximation with a secure knot. The sliding knot is widely preferred over the nonsliding knot, with numerous publications describing knot configurations. However, in the literature there are few published descriptions of suture-handling techniques, even though they are fundamental to arthroscopic knot tying. We describe integral suture-handling techniques for arthroscopic sliding knots to improve the surgeon's performance in knot tying...
August 2016: Arthroscopy Techniques
Beom Seok Kim, Geehong Choi, Sangwoo Shin, Thomas Gemming, Hyung Hee Cho
The enhancement of boiling heat transfer, the most powerful energy-transferring technology, will lead to milestones in the development of high-efficiency, next-generation energy systems. Perceiving nano-inspired interface functionalities from their rough morphologies, we demonstrate interface-induced liquid refreshing is essential to improve heat transfer by intrinsically avoiding Leidenfrost phenomenon. High liquid accessibility of hemi-wicking and catalytic nucleation, triggered by the morphological and hydrodynamic peculiarities of nano-inspired interfaces, contribute to the critical heat flux (CHF) and the heat transfer coefficient (HTC)...
October 6, 2016: Scientific Reports
Jane Antony, Tuan Zea Tan, Zoe Kelly, Jeffrey Low, Mahesh Choolani, Chiara Recchi, Hani Gabra, Jean Paul Thiery, Ruby Yun-Ju Huang
Ovarian cancer is a complex disease with heterogeneity among the gene expression molecular subtypes (GEMS) between patients. Patients with tumors of a mesenchymal ("Mes") subtype have a poorer prognosis than patients with tumors of an epithelial ("Epi") subtype. We evaluated GEMS of ovarian cancer patients for molecular signaling profiles and assessed how the differences in these profiles could be leveraged to improve patient clinical outcome. Kinome enrichment analysis identified AXL as a particularly abundant kinase in Mes-subtype tumor tissue and cell lines...
October 4, 2016: Science Signaling
Williams Turpin, Osvaldo Espin-Garcia, Wei Xu, Mark S Silverberg, David Kevans, Michelle I Smith, David S Guttman, Anne Griffiths, Remo Panaccione, Anthony Otley, Lizhen Xu, Konstantin Shestopaloff, Gabriel Moreno-Hagelsieb, Andrew D Paterson, Kenneth Croitoru
Intestinal microbiota is known to be important in health and disease. Its composition is influenced by both environmental and host factors. Few large-scale studies have evaluated the association between host genetic variation and the composition of microbiota. We recruited a cohort of 1,561 healthy individuals, of whom 270 belong in 123 families, and found that almost one-third of fecal bacterial taxa were heritable. In addition, we identified 58 SNPs associated with the relative abundance of 33 taxa in 1,098 discovery subjects...
October 3, 2016: Nature Genetics
Gabi Steinbach, Sibylle Gemming, Artur Erbe
Despite its prominent role in the dynamics of soft materials, rotational friction remains a quantity that is difficult to determine for many micron-sized objects. Here, we demonstrate how the Stokes coefficient of rotational friction can be obtained from the driven torsional oscillations of single particles in a highly viscous environment. The idea is that the oscillation amplitude of a dipolar particle under combined static and oscillating fields provides a measure for the Stokes friction. From numerical studies we derive a semi-empirical analytic expression for the amplitude of the oscillation, which cannot be calculated analytically from the equation of motion...
September 29, 2016: Scientific Reports
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