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https://www.readbyqxmd.com/read/29346682/receptor-usage-of-a-novel-bat-lineage-c-betacoronavirus-reveals-evolution-of-mers-related-coronavirus-spike-proteins-for-human-dpp4-binding
#1
Susanna K P Lau, Libiao Zhang, Hayes K H Luk, Lifeng Xiong, Xingwen Peng, Kenneth S M Li, Xiangyang He, Pyrear Su-Hui Zhao, Rachel Y Y Fan, Antonio C P Wong, Syed Shakeel Ahmed, Jian-Piao Cai, Jasper F W Chan, Yinyan Sun, Dongyan Jin, Honglin Chen, Terrence C K Lau, Raven K H Kok, Wenhui Li, Kwok-Yung Yuen, Patrick C Y Woo
Although bats are known to harbor MERS-CoV-related viruses, the role of bats in the evolutionary origin and pathway remains obscure. We identified a novel MERS-CoV-related betacoronavirus, Hp-BatCoV HKU25, from Chinese pipistrelle bats. While being closely related to MERS-CoV in most genome regions, its spike protein occupies a phylogenetic position between that of Ty-BatCoV HKU4 and Pi-BatCoV HKU5. Since Ty-BatCoV HKU4 but not Pi-BatCoV HKU5 can utilize MERS-CoV receptor, hDPP4, for cell entry, we tested the ability of Hp-BatCoV HKU25 to bind and utilize hDPP4...
January 16, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29345408/the-effect-of-eradication-of-helicobacter-pylori-on-gastric-cancer-prevention-in-healthy-asymptomatic-populations
#2
Suh Eun Bae, Kee Don Choi, Jaewon Choe, Seon Ok Kim, Hee Kyong Na, Ji Young Choi, Ji Yong Ahn, Kee Wook Jung, JeongHoon Lee, Do Hoon Kim, Hye-Sook Chang, Ho June Song, Gin Hyug Lee, Hwoon-Yong Jung
BACKGROUND: Although many epidemiologic studies have evaluated the effect of Helicobacter pylori eradication on gastric cancer, the effect is still uncertain in general populations. We evaluated whether H. pylori eradication would affect the incidence of gastric cancer in healthy asymptomatic populations. MATERIALS AND METHODS: We performed a retrospective cohort study in 38 984 asymptomatic individuals, who underwent health screening examinations more than twice between 2005 and 2016...
January 18, 2018: Helicobacter
https://www.readbyqxmd.com/read/29345388/dentin-bond-strength-and-nanoleakage-of-the-adhesive-interface-after-intracoronal-bleaching
#3
Vanessa Cavalli, Maicon Sebold, Mirela Sanae Shinohara, Patrícia Nóbrega Rodrigues Pereira, Marcelo Giannini
This study evaluated dentin bond strength (BS) and nanoleakage of non- and pre-etched dentin immediately (T0 ,), 7 days (T7 ), and 14 days (T14 ) after bleaching. Bovine incisors (150) were selected and half of them submitted to intrapulpal dentin etching (e). Non- and pre-etched dentin were subjected to the following (n = 15): no bleaching/control (C); 35% carbamide peroxide (CP); 35% hydrogen peroxide (35% HP); 25% hydrogen peroxide (25% HP); and sodium perborate (SP). Bleaching agents were applied to the pulp chamber four times within a 72-h interval...
January 18, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29345163/low-dose-hp-hmg-in-an-antagonist-protocol-for-ivf-in-ovulatory-and-anovulatory-patients-with-high-amh
#4
Negjyp Sopa, Elisabeth Clare Larsen, Anders Nyboe Andersen
Women with high-AMH levels have an increased risk of ovarian hyperstimulation syndrome (OHSS). Studies have suggested that highly purified menotropin (HP-hMG) Menopur® reduces the risk. We, therefore, studied use of low-dose (112.5 IU/day) HP-hMG in ovulatory and anovulatory patients with high AMH (>32 pmol/L). The primary endpoint was the distribution of patients with appropriate, excessive, and inadequate response (5-14, ≥15, and ≤4 oocytes). Another endpoint was frequency of OHSS. Totally 115 women were included and 78 (67...
January 18, 2018: Gynecological Endocrinology
https://www.readbyqxmd.com/read/29345141/creating-hierarchical-pores-by-controlled-linker-thermolysis-in-multivariate-metal-organic-frameworks
#5
Liang Feng, Shuai Yuan, Liang-Liang Zhang, Kui Tan, Jia-Luo Li, Angelo Kirchon, Ling-Mei Liu, Peng Zhang, Yu Han, Yves J Chabal, Hong-Cai Zhou
Sufficient pore size, appropriate stability and hierarchical porosity are three prerequisites for open frameworks designed for drug delivery, enzyme immobilization and catalysis involving large molecules. Herein, we report a powerful and general strate-gy, linker thermolysis, to construct ultra-stable hierarchically porous metal-organic frameworks (HP-MOFs) with tunable pore size distribution. Linker instability, usually an undesirable trait of MOFs, was exploited to create mesopores by generating crystal defects throughout a microporous MOF crystal via thermolysis...
January 18, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29342878/improved-photo-ignition-of-carbon-nanotubes-ferrocene-using-a-lipophilic-porphyrin-under-white-power-led-irradiation
#6
Paolo Visconti, Patrizio Primiceri, Roberto de Fazio, Antonio Paolo Carlucci, Selma Elaine Mazzetto, Giuseppe Mele
The aim of this work is to investigate and characterize the photo-ignition process of dry multi-walled carbon nanotubes (MWCNTs) mixed with ferrocene (FeCp₂) powder, using an LED (light-emitting diode) as the light source, a combination that has never been used, to the best of our knowledge. The ignition process was improved by adding a lipophilic porphyrin (H₂Pp) in powder to the MWCNTs/FeCp₂ mixtures-thus, a lower ignition threshold was obtained. The ignition tests were carried out by employing a continuous emission and a pulsed white LED in two test campaigns...
January 13, 2018: Materials
https://www.readbyqxmd.com/read/29341450/characterization-of-a-novel-papain-inducible-murine-model-of-eosinophilic-rhinosinusitis
#7
Anuj Tharakan, Alex Dobzanski, Nyall R London, Syed M Khalil, Nitya Surya, Andrew P Lane, Murugappan Ramanathan
BACKGROUND: Eosinophilic chronic rhinosinusitis (ECRS) is a disease characterized by eosinophilic inflammatory infiltrate and a local type 2 cytokine milieu. Current animal models fail to recapitulate many of the innate and adaptive immunologic hallmarks of the disease, thus hindering the development of effective therapeutics. In the present study, mice were exposed intranasally to the cysteine protease papain, which shares functional similarities with parasitic proteases and aeroallergens, to generate a rapidly inducible murine model of eosinophilic rhinosinusitis...
January 17, 2018: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/29340761/long-term-efficacy-and-toxicity-of-rituximab-plus-fludarabine-and-mitoxantrone-r-fm-for-gastric-marginal-zone-lymphoma-a-single-center-experience-and-literature-review
#8
Emanuele Cencini, Alberto Fabbri, Francesco Lauria, Monica Bocchia
There is no consensus about the best treatment option for patients with HP-negative gastric MALT lymphomas or persistent disease after HP eradication.We have investigated fludarabine and mitoxantrone with rituximab (R-FM) as first-line treatment. A cohort of 13 patients was analyzed. Induction treatment consisted of fludarabine (25 mg/m2 i.v. on days 2 to 4), mitoxantrone (10 mg/m2 i.v. on day 2), and rituximab (375 mg/m2 i.v. on day 1), for up to six cycles every 28 days. All patients achieved a complete remission, a median of four cycles was given...
January 16, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29338727/mendelian-randomization-analysis-to-assess-a-causal-effect-of-haptoglobin-on-macroangiopathy-in-chinese-type-2-diabetes-patients
#9
Shiyun Wang, Jie Wang, Rong Zhang, Tao Wang, Dandan Yan, Zhen He, Feng Jiang, Cheng Hu, Weiping Jia
BACKGROUND: Haptoglobin (Hp) functions as an antioxidant by binding with haemoglobin. We investigated whether serum Hp has a causal effect on macroangiopathy via Mendelian randomization (MR) analysis with common variants of the Hp gene in Chinese patients with type 2 diabetes. METHODS: A total of 5687 type 2 diabetes patients were recruited and genotyped for the Hp gene. Clinical features and vascular imaging tests were applied to diagnose macroangiopathy. The association between common Hp genotypes and macroangiopathy was analyzed in the whole population...
January 16, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29338582/a-human-pericardium-biopolymeric-scaffold-for-autologous-heart-valve-tissue-engineering-cellular-and-extracellular-matrix-structure-and-biomechanical-properties-in-comparison-with-a-normal-aortic-heart-valve
#10
Frantisek Straka, David Schornik, Jaroslav Masin, Elena Filova, Tomas Mirejovsky, Zuzana Burdikova, Zdenek Svindrych, Hynek Chlup, Lukas Horny, Matej Daniel, Jiri Machac, Jelena Skibová, Jan Pirk, Lucie Bacakova
The objective of our study was to compare the cellular and extracellular matrix (ECM) structure and the biomechanical properties of human pericardium (HP) with the normal human aortic heart valve (NAV). HP tissues (from 12 patients) and NAV samples (from 5 patients) were harvested during heart surgery. The main cells in HP were pericardial interstitial cells (PICs), which are fibroblast-like cells of mesenchymal origin similar to the valvular interstitial cells (VICs) in NAV tissue. The extracellular matrix (ECM) of HP had a statistically significantly (p ≤ 0...
January 17, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29337166/cd163-knockout-pigs-are-fully-resistant-to-highly-pathogenic-porcine-reproductive-and-respiratory-syndrome-virus
#11
Huaqiang Yang, Jian Zhang, Xianwei Zhang, Junsong Shi, Yongfei Pan, Rong Zhou, Guoling Li, Zicong Li, Gengyuan Cai, Zhenfang Wu
Porcine reproductive and respiratory syndrome virus (PRRSV) causes severe economic losses to current swine production worldwide. Highly pathogenic PRRSV (HP-PRRSV), originated from a genotype 2 PRRSV, is more virulent than classical PRRSV and further exacerbates the economic impact. HP-PRRSV has become the predominant circulating field strain in China since 2006. CD163 is a cellular receptor for PRRSV. The depletion of CD163 whole protein or SRCR5 region (interaction site for the virus) confers resistance to infection of several PRRSV isolates in pigs or cultured host cells...
January 11, 2018: Antiviral Research
https://www.readbyqxmd.com/read/29337039/the-presence-of-small-and-diminutive-proximal-hyperplastic-polyps-is-associated-with-higher-rates-of-synchronous-advanced-neoplasia-compared-with-patients-without-serrated-lesions
#12
Hamoudah Thayer, Ma Karen, Esteban Marcus, Hayat Waqas, Mahon Brett, Jakate Shriram, Melson Joshua
BACKGROUND: The association of proximal small and diminutive hyperplastic polyps (HPs) with synchronous neoplasia (AN) is not well defined. However, sessile serrated polyps, even when small, are known to portend synchronous neoplastic risk. Currently, when proximal small hyperplastic polyps are detected, the USMTF does not recommend a change in surveillance interval. We aimed to compare the rates of synchronous AN in a screening colonoscopy cohort of patients with small and then diminutive proximal HPs in comparison, first to a cohort absent any serrated or proximal hyperplastic polyps, and then in comparison with a cohort with small proximal sessile serrated polyps (SSPs)...
January 11, 2018: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29335877/development-of-cyclic-amp-receptor-protein-based-artificial-transcription-factor-for-intensifying-gene-expression
#13
Peng Zhao, Wenjuan Wang, Pingfang Tian
Vector-dependent gene overexpression typically relies on an efficient operon and sufficient RNA polymerases (RNAPs). The lac (lactose) operon is a paradigm of transcription control, and cyclic AMP receptor protein (CRP) is a global regulator capable of recruiting RNAPs. However, the gap between lac operon and CRP has not been well bridged. In this work, CRP was fused to lac repressor protein (lacI) to form an artificial transcription factor (ATF) with the expectation that when LacI acted on the lacO-positioned upstream of gene of interest, the LacI-tethered CRP would trap RNAPs and thus improve the expression of PuuC, an aldehyde dehydrogenase catalyzing 3-hydroxypropionaldehyde (3-HPA) to 3-hydroxypropionic acid (3-HP) in Klebsiella pneumoniae...
January 16, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29334778/fluid-dynamic-analysis-of-hand-pump-infuser-and-uromat-e-a-s-i-sup-%C3%A2-sup-pump-facilitated-irrigation-through-a-flexible-ureteroscope
#14
Daniel J Lama, Michael Owyong, Egor Parkhomenko, Roshan M Patel, Jaime Landman, Ralph V Clayman
INTRODUCTION: To evaluate the flow characteristics produced by a manual and automated-pump irrigation system connected to a flexible ureteroscope. METHODS: An in vitro analysis of a manual hand-pump infuser (HP) and the UROMAT Endoscopic Automatic System for Irrigation® (E.A.S.I.) pump was performed. Standard irrigation tubing was used to connect a three-way valve to a flexible ureteroscope, the irrigation system and a digital manometer. Flow rate and irrigation pressure measurements were recorded over a 15-minute period using pressure settings of 150 and 200 mmHg for both irrigation pump systems...
January 15, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29334639/vestibular-schwannoma-and-hearing-preservation-usefulness-of-level-specific-ce-chirp-abr-monitoring-a-retrospective-study-on-25-cases-with-preoperative-socially-useful-hearing
#15
Luciano Mastronardi, Ettore Di Scipio, Guglielmo Cacciotti, Raffaelino Roperto
BACKGROUND AND OBJECTIVES: Decision-making regarding the therapy of vestibular schwannoma (VS) changed over the last decades, during which curative microsurgery has been promoted. Goals of VS microsurgery are: extensive resection, facial nerve (FN) preservation and, in selected cases, hearing preservation (HP). The aim of this study is to evaluate postoperative HP with reference to tumor size in patients operated on with Level Specific (LS)-CE-Chirp® ABR monitoring. PATIENTS AND METHODS: Twentyfive consecutive patients with socially useful hearing (SUH) underwent VS microneurosurgery by retrosigmoid (RS) approach...
January 10, 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29332339/p21-does-but-p53-does-not-predict-pathological-response-to-preoperative-chemoradiotherapy-in-locally-advanced-rectal-cancer
#16
Suzana Stojanovic-Rundic, Radmila Jankovic, Marjan Micev, Vladimir Nikolic, Ivan Popov, Dusica Gavrilovic, Vesna Plesinac-Karapandzic, Aleksandra Djuric-Stefanovic, Zoran Krivokapic, Sinisa Radulovic
PURPOSE: Preoperative chemoradiotherapy (CRT) is the standard treatment option in locally advanced rectal cancer. The tumor response is assessed through tumor and nodal downstaging and the tumor regression grade. Currently, there is no method to predict a tumor response to CRT. We aimed to evaluate whether p21 and p53 expressions could be a reliable predictors of pathological response to CRT. METHODS: Fifty patients with locally advanced rectal cancer were treated with preoperative radiotherapy combined with mitomycin C and capecitabine...
November 2017: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/29330287/targeted-akt-inhibition-in-prostate-cancer-cells-and-spheroids-reduces-aerobic-glycolysis-and-generation-of-hyperpolarized-1-13c-lactate
#17
Sui Seng Tee, Izabela Suster, Steven Truong, Sangmoo Jeong, Roozbeh Eskandari, Valentina Di Gialleonardo, Julio A Alvarez, Hannah N Aldeborgh, Kayvan Keshari
The PI3K/AKT/mTOR (PAM) signaling pathway is frequently mutated in prostate cancer. Specific AKT inhibitors are now in advanced clinical trials and this study investigates the effect of MK2206, a non-ATP competitive inhibitor, on the cellular metabolism in the context of prostate cancer. A significant reduction in cell motility and aerobic glycolysis was observed in prostate cancer cells with treatment. These changes were not accompanied by a reduction in the ratio of high-energy phosphates or a change in total protein levels of enzymes (e...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29329923/different-protein-composition-of-low-calorie-diet-differently-impacts-adipokine-profile-irrespective-of-weight-loss-in-overweight-and-obese-women
#18
R Mateo-Gallego, I Lamiquiz-Moneo, S Perez-Calahorra, V Marco-Benedí, A M Bea, L Baila-Rueda, M Laclaustra, J L Peñalvo, F Civeira, A Cenarro
BACKGROUND AND AIMS: High-protein (HP) diets have shown benefits in cardiometabolic markers such as insulin or triglycerides but the responsible mechanisms are not known. We aimed to assess the effect of three energy-restricted diets with different protein contents (20%, 27%, and 35%; ∼80% coming from animal source) on plasma adipokine concentration and its association with changes in cardiometabolic markers. METHODS: Seventy-six women (BMI 32.8 ± 2.93) were randomized to one of three calorie-reduced diets, with protein, 20%, 27%, or 35%; carbohydrates, 50%, 43%, or 35%; and fat, 30%, for 3 months...
November 4, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29329859/effect-of-high-pressure-on-structural-modifications-and-enzymatic-activity-of-a-purified-x-prolyl-dipeptidyl-aminopeptidase-from-streptococcus-thermophilus
#19
M Giannoglou, Z Alexandrakis, Ph Stavros, G Katsaros, P Katapodis, G Nounesis, P Taoukis
PepX aminopeptidase from Streptococcus thermophilus ACA DC 0022, used in Greek Feta cheese manufacturing, was purified. PepX comprises two subunits of equal molecular mass estimated, using SDS-PAGE and native-PAGE electrophoresis, to be 86 kDa. The effects of high pressure processing (100-450 MPa, combined with 20-40 °C) on purified PepX activity and structure were studied. Activation of the enzyme was observed after processing at 100-200 MPa and 20-30 °C. More intense processing conditions led to enzyme inactivation...
May 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29326518/toothpaste-use-protocol-with-dental-bleaching-for-a-conservative-treatment-case-reports
#20
Waldemir F Vieira-Junior, Thayla H N Gouveia, Bruna G Silva, Vanessa C P S Bueno, Flávio H B Aguiar, Débora A N L Lima
In-office bleaching is a treatment based on products that contain hydrogen peroxide (HP) while demonstrating whitening effectiveness. HP could promote alterations to surface morphologies and properties of dental tissues. The objective was describe a toothpaste protocol associated to bleaching therapy to promote a safer approach. Patient 1 (male) and Patient 2 (female) were attended, and toothbrushing (twice a day) with a dentifrice containing bioactive glass (BG) (NovaMin™) and fluoride was indicated before and during the treatment...
October 2017: Contemporary Clinical Dentistry
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