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https://www.readbyqxmd.com/read/29454286/the-vasodilatory-effect-of-allopurinol-mediates-its-antihypertensive-effect-effects-on-calcium-movement-and-cardiac-hemodynamics
#1
Hany M El-Bassossy, Mona F Mahmoud, Basma G Eid
Despite the reported reduction in blood pressure in hypertensive patients treated with allopurinol, the mechanism of the allopurinol hypotensive effect is still unclear. In the current study, the hypotensive effect of allopurinol has been fully investigated in hypertensive rats. Hypertension was induced in rats by angiotensin II (120 ng/min/kg) infusion for two weeks. Rats were then subjected to real-time recording of blood pressure, left ventricular pressure and volume and surface ECG. After 10 min of basal recording, allopurinol was slowly injected into the femoral vein with a dose of 10 μmole/kg...
February 14, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29454026/adaptation-of-escherichia-coli-to-long-term-batch-culture-in-various-rich-media
#2
Lacey L Westphal, Jasmine Lau, Zuly Negro, Ivan J Moreno, Wazim Ismail Mohammed, Heewook Lee, Haixu Tang, Steven E Finkel, Karin E Kram
Experimental evolution studies have characterized the genetic strategies microbes utilize to adapt to their environments, mainly focusing on how microbes adapt to constant and/or defined environments. Using a system that incubates Escherichia coli in different complex media in long-term batch culture, we have focused on how heterogeneity and environment affects adaptive landscapes. In this system, there is no passaging of cells, and therefore genetic diversity is lost only through negative selection, without the experimentally-imposed bottlenecking common in other platforms...
February 14, 2018: Research in Microbiology
https://www.readbyqxmd.com/read/29454024/development-of-an-in-vitro-screening-method-of-acute-cytotoxicity-of-the-pyrrolizidine-alkaloid-lasiocarpine-in-human-and-rodent-hepatic-cell-lines-by-increasing-susceptibility
#3
Kristina Forsch, Verena Schöning, Lucia Disch, Beate Siewert, Matthias Unger, Jürgen Drewe
ETHNOPHARMACOLOGICAL RELEVANCE: Pyrrolizidine alkaloids (PAs) are secondary plant ingredients formed in many plant species to protect against predators. PAs are generally considered acutely hepatotoxic, genotoxic and carcinogenic. Up to now, only few in vitro and in vivo investigations were performed to evaluate their relative toxic potential. AIM OF THE STUDY: The aim was to develop an in vitro screening method of their cytotoxicity. MATERIALS AND METHODS: Human and rodent hepatocyte cell lines (HepG2 and H-4-II-E) were used to assess cytotoxicity of the PA lasiocarpine...
February 14, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29453992/serum-cystatin-c-level-is-associated-with-carotid-arterial-wall-elasticity-in-subjects-with-type-2-diabetes-mellitus-a-potential-marker-of-early-stage-atherosclerosis
#4
Rei Kaneko, Shojiro Sawada, Ai Tokita, Rieko Honkura, Noriko Tumura, Shinjiro Kodama, Tomohito Izumi, Kei Takahashi, Kenji Uno, Junta Imai, Tetsuya Yamada, Yukiya Miyachi, Hideyuki Hasegawa, Hiroshi Kanai, Yasushi Ishgaki, Hideki Katagiri
AIMS: Detection of early-stage atherosclerosis in type 2 diabetes mellitus (T2DM) patients is important for preventing cardiovascular disease. A phased tracking method for evaluating arterial wall elasticity sensitively detects early-stage atherosclerosis. However, biochemical markers for early-stage atherosclerosis have yet to be established. METHODS: This cross-sectional study enrolled 180 T2DM patients, who were classified as not having atherosclerosis according to the carotid intima-media thickness (IMT) criteria...
February 14, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29453849/methionine-is-required-for-camp-pka-mediated-morphogenesis-and-virulence-of-candida-albicans
#5
Sanne Schrevens, Griet Van Zeebroeck, Michael Riedelberger, Hélène Tournu, Karl Kuchler, Patrick Van Dijck
Candida albicans is a major human fungal pathogen, causing superficial, as well as life-threatening invasive infections. Therefore, it has to adequately sense and respond to the host defense by expressing appropriate virulence attributes. The most important virulence factor of C. albicans is the yeast-to-hyphae morphogenetic switch, which can be induced by numerous environmental cues, including the amino acid methionine. Here, we show an essential role for methionine permease Mup1 in methionine-induced morphogenesis, biofilm formation, survival inside macrophages and virulence...
February 17, 2018: Molecular Microbiology
https://www.readbyqxmd.com/read/29453778/-i-m-happy-to-own-my-implicit-biases-public-encounters-with-the-implicit-association-test
#6
Jeffery Yen, Kevin Durrheim, Romin W Tafarodi
The implicit association test (IAT) and concept of implicit bias have significantly influenced the scientific, institutional, and public discourse on racial prejudice. In spite of this, there has been little investigation of how ordinary people make sense of the IAT and the bias it claims to measure. This article examines the public understanding of this research through a discourse analysis of reactions to the IAT and implicit bias in the news media. It demonstrates the ways in which readers interpreted, related to, and negotiated the claims of IAT science in relation to socially shared and historically embedded concerns and identities...
February 16, 2018: British Journal of Social Psychology
https://www.readbyqxmd.com/read/29453688/rapid-optimization-of-spore-production-from-bacillus-amyloliquefaciens-in-submerged-cultures-based-on-dipicolinic-acid-fluorimetry-assay
#7
Hang Ren, Ya-Ting Su, Xiao-Hua Guo
Some optimization techniques have been widely applied for spore fermentation based on the plate counting. This study optimized the culture medium for the spore production of Bacillus amyloliquefaciens BS-20 and investigated the feasibility of using a dipicolonic acid (DPA) fluorimetry assay as a simpler alternative to plate counting for evaluating spore yields. Through the single-factor experiment, the metal ions and agro-industrial raw materials that significantly enhanced spore production were determined...
February 16, 2018: AMB Express
https://www.readbyqxmd.com/read/29453675/evaluation-of-carotid-artery-elasticity-in-patients-with-uremia-by-echo-tracking
#8
Hong Liang, Dawei Wang, Guoying Che, Yanxin Su
PURPOSE: The purpose of this study was to compare the carotid artery wall elasticity between patients with uremia and controls using echo tracking (ET). METHODS: Ninety-three patients with uremia and 35 control subjects (Group A) were enrolled in this study. In the ET mode, the carotid artery elasticity parameters including stiffness index (β), pressure-strain elasticity modulus (EP), arterial compliance (AC), and one-point pulse wave velocity (PWVβ) were measured, and carotid intima-media thickness (IMT) was measured with B-mode ultrasonography...
February 16, 2018: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/29453401/endothelial-smoothened-dependent-hedgehog-signaling-is-not-required-for-sonic-hedgehog-induced-angiogenesis-or-ischemic-tissue-repair
#9
Rajesh Gupta, Alexander R Mackie, Sol Misener, Lijun Liu, Douglas W Losordo, Raj Kishore
Sonic Hedgehog (Shh) signaling induces neovascularization and angiogenesis. It is not known whether the hedgehog signaling pathway in endothelial cells is essential to angiogenesis. Smoothened (Smo) transduces hedgehog signaling across the cell membrane. This study assessed whether endothelial Smoothened-dependent Shh signaling is required for Shh-mediated angiogenesis and ischemic tissue repair. Endothelial-specific smoothened knockout mice, eSmo Null were created using Cre-lox recombination system. eSmo Null mice had no observable phenotype at baseline and showed normal cardiac function...
February 16, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29453319/leptin-signaling-mediates-obesity-associated-csc-enrichment-and-emt-in-preclinical-tnbc-models
#10
Laura W Bowers, Emily L Rossi, Shannon B McDonell, Steven S Doerstling, Subreen A Khatib, Claire G Lineberger, Jody E Albright, Xiaohu Tang, Linda A deGraffenried, Stephen D Hursting
Obesity is associated with poor prognosis in triple-negative breast cancer (TNBC). Preclinical models of TNBC were used to test the hypothesis that increased leptin signaling drives obesity-associated TNBC development by promoting cancer stem cell (CSC) enrichment and/or epithelial-to-mesenchymal transition (EMT). MMTV-Wnt-1 transgenic mice, which develop spontaneous basal-like, triple-negative mammary tumors, received either a control diet (10% kcal from fat) or a diet-induced obesity regimen (DIO, 60% kcal from fat) for up to 42 weeks (n=15/group)...
February 16, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29453290/mouse-and-human-hspc-immobilization-in-liquid-culture-by-cd43-or-cd44-antibody-coating
#11
Dirk Loeffler, Weijia Wang, Alois Hopf, Oliver Hilsenbeck, Paul E Bourgine, Fabian Rudolf, Ivan Martin, Timm Schroeder
Keeping track of individual cell identifications is imperative to the study of dynamic single cell behavior over time. Highly motile hematopoietic stem and progenitor cells (HSPCs) migrate quickly and do not adhere, and thus must be imaged very frequently to keep cell identifications. Even worse, they are also flushed away during medium exchange. To overcome these limitations, we tested antibody coating for reducing HSPC motility in vitro. Anti-CD43 and -CD44 antibody coating reduced cell motility of mouse and human HSPCs in a concentration dependent manner...
February 16, 2018: Blood
https://www.readbyqxmd.com/read/29453274/select-and-resequence-reveals-relative-fitness-of-bacteria-in-symbiotic-and-free-living-environments
#12
Liana T Burghardt, Brendan Epstein, Joseph Guhlin, Matt S Nelson, Margaret R Taylor, Nevin D Young, Michael J Sadowsky, Peter Tiffin
Assays to accurately estimate relative fitness of bacteria growing in multistrain communities can advance our understanding of how selection shapes diversity within a lineage. Here, we present a variant of the "evolve and resequence" approach both to estimate relative fitness and to identify genetic variants responsible for fitness variation of symbiotic bacteria in free-living and host environments. We demonstrate the utility of this approach by characterizing selection by two plant hosts and in two free-living environments (sterilized soil and liquid media) acting on synthetic communities of the facultatively symbiotic bacterium Ensifer meliloti We find ( i ) selection that hosts exert on rhizobial communities depends on competition among strains, ( ii ) selection is stronger inside hosts than in either free-living environment, and ( iii ) a positive host-dependent relationship between relative strain fitness in multistrain communities and host benefits provided by strains in single-strain experiments...
February 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29453265/integrated-metabolomics-and-morphogenesis-reveals-volatile-signaling-of-the-nematode-trapping-fungus-arthrobotrys-oligospora
#13
Bai-Le Wang, Yong-Hong Chen, Jia-Ning He, Hua-Xi Xue, Ni Yan, Zhi-Jun Zeng, Joan W Bennett, Ke-Qin Zhang, Xue-Mei Niu
The adjustment of metabolic patterns is fundamental to fungal biology and plays vital roles in adaption to diverse ecological challenges. Nematode trapping fungi can switch lifestyles from saprophytic to pathogenic by developing specific trapping devices induced by nematodes to infect their prey as a response to nutrient depletion in nature. However, the chemical identity of the specific fungal metabolites used during the switch remains poorly understood. We hypothesized that these important signal molecules might be volatile in nature...
February 16, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29453260/a-new-cell-extraction-method-reveals-hemolymph-microbiome-of-three-aquatic-invertebrates
#14
Xinxu Zhang, Zaiqiao Sun, Xusheng Zhang, Ming Zhang, Shengkang Li
Symbiotic microorganisms have been found in the hemolymph (blood) of many aquatic invertebrates, such as crabs, shrimps and oysters. Hemolymph is a critical site in host immune response. Currently, studies on hemolymph microorganisms are mostly performed with culture-dependent strategies using selective media (e.g., TCBS, 2216E, and LB) for enumerating and isolating microbial cells. However, doubts remain about the "true" representation of the microbial abundance and diversity of symbiotic microorganisms in hemolymph, particularly for uncultivable microorganisms which are believed to be more abundant than the cultured...
February 16, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29453257/a-facile-arsenazo-iii-based-assay-for-monitoring-rare-earth-element-depletion-from-cultivation-media-of-methanotrophic-and-methylotrophic-bacteria
#15
Carmen Hogendoorn, Paula Roszczenko-Jasińska, N Cecilia Martinez-Gomez, Johann de Graaff, Patrick Grassl, Arjan Pol, Huub J M Op den Camp, Lena J Daumann
Recently, methanotrophic and methylotrophic bacteria were found to utilize rare earth elements (REE). To monitor the REE-content in culture media of these bacteria we have developed a rapid screening method using the Arsenazo III (AS III) dye for spectrophotometric REE-detection in the low μM (0.1-10 μM) range. We designed this assay to follow La III and Eu III depletion from the culture medium by the acidophilic verrucomicrobial methanotroph Methylacidiphilum fumariolicum SolV. The assay can also be modified to screen the uptake of other REE such as Pr III or to monitor the depletion of La III from growth media in neutrophilic methylotrophs such as Methylobacterium extorquens AM1...
February 16, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29453071/degradation-of-dye-procion-red-mx-5b-by-electrolytic-and-electro-irradiated-technologies-using-diamond-electrodes
#16
Salvador Cotillas, Davide Clematis, Pablo Cañizares, Maria Paola Carpanese, Manuel A Rodrigo, Marco Panizza
This work focuses on the treatment of synthetic wastewater polluted with dye Procion Red MX-5B by different Electrochemical Advanced Oxidation Processes (EAOP) based on diamond anodes. The influence of the current density and the supporting electrolyte has been studied on dye removal and total mineralization of the organic matter. Results show that electrolysis with diamond electrodes is a suitable technology for an efficient degradation of dye. Nonetheless, the process efficiency increases when using chloride as supporting electrolyte because of the electrochemical generation of hypochlorite in wastewater which significantly contribute to dye removal...
February 3, 2018: Chemosphere
https://www.readbyqxmd.com/read/29453048/a-system-composed-of-a-biofilm-electrode-reactor-and-a-microbial-fuel-cell-constructed-wetland-exhibited-efficient-sulfamethoxazole-removal-but-induced-sul-genes
#17
Shuai Zhang, Hai-Liang Song, Xiao-Li Yang, Hua Li, Ya-Wen Wang
The aim of this work was to study sulfamethoxazole (SMX) removal efficiency and fate of corresponding sul genes in a stacked microbial fuel cell-constructed wetland coupled biofilm electrode reactor system (MFC-CW-BER). Findings showed that two stacked MFC-CWs could provide a relatively stable electricity supply to support the biofilm for SMX removal. Excellent SMX removal (>99.29%) was obtained in the BER-MFC-CW. Compared with the 2000 µg L -1 SMX influent, the relative abundance of the sul genes in biofilm media and effluent was enhanced with continuously high concentrations of SMX (4000 μg L -1 )...
February 7, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29452974/-running-two-rooms-does-not-compromise-outcomes-or-patient-safety-in-joint-arthroplasty
#18
William G Hamilton, Henry Ho, Nancy L Parks, Alexander V Strait, Robert H Hopper, James F McDonald, Nitin Goyal, Kevin B Fricka, C Anderson Engh
BACKGROUND: Scrutiny from the federal government and the media regarding the safety of 1 surgeon doing cases in 2 operating rooms (ORs) on the same day, prompted us to examine our own institutional data. Over the past 11 years, surgeons at our facility have operated consecutively in 1 OR on a given day or used 2 alternating ORs. This study compares these cases with a focus on revisions and complications in both groups. METHODS: Six surgeons performed a total of 16,916 primary hip and knee arthroplasties from 2006-2016...
January 31, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29452846/differential-role-of-gpab-and-sida-gene-expressions-in-relation-to-virulence-in-aspergillus-species-from-patients-with-invasive-aspergillosis
#19
Nayereh Ghods, Mehraban Falahati, Maryam Roudbary, Shirin Farahyar, Masoud Shamaei, Mahin Pourabdollah, Farhad Seif
The virulence genes in invasive aspergillosis (IA) have not been analyzed adequately. The present study was designed to evaluate the expression of gpaB and sidA genes, which are important virulence genes in Aspergillus spp. from bronchoalveolar lavage (BAL) samples. Direct examination and culture on Czapek Agar and Sabouraud Dextrose Agar media were performed for 600 BAL specimens isolated from patients with possible aspergillosis. A Galactomannan ELISA assay was also carried out. The expression levels of the gpaB and sidA genes in isolates were analyzed using quantitative real-time PCR (qRT-PCR)...
February 3, 2018: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/29452783/oxidative-stress-is-increased-in-sarcopenia-and-associated-with-cardiovascular-disease-risk-in-sarcopenic-obesity
#20
Francesco Bellanti, Antonino D Romano, Aurelio Lo Buglio, Valeria Castriotta, Giuseppe Guglielmi, Antonio Greco, Gaetano Serviddio, Gianluigi Vendemiale
OBJECTIVES: To define whether circulating markers of oxidative stress correlate with sarcopenia in terms of glutathione balance and oxidative protein damage, and whether these biomarkers are associated with risk of cardiovascular disease (CVD). STUDY DESIGN: Population-based cross-sectional study. 115 out of 347 elderly subjects were classified as non-sarcopenic non-obese (NS-NO), sarcopenic non-obese (S-NO), non-sarcopenic obese (NS-O), and sarcopenic obese (S-O)...
March 2018: Maturitas
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