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https://www.readbyqxmd.com/read/28443246/genetic-and-dietary-iron-overload-differentially-affect-the-course-of-salmonella-typhimurium-infection
#1
Manfred Nairz, Andrea Schroll, David Haschka, Stefanie Dichtl, Piotr Tymoszuk, Egon Demetz, Patrizia Moser, Hubertus Haas, Ferric C Fang, Igor Theurl, Günter Weiss
Genetic and dietary forms of iron overload have distinctive clinical and pathophysiological features. HFE-associated hereditary hemochromatosis is characterized by overwhelming intestinal iron absorption, parenchymal iron deposition, and macrophage iron depletion. In contrast, excessive dietary iron intake results in iron deposition in macrophages. However, the functional consequences of genetic and dietary iron overload for the control of microbes are incompletely understood. Using Hfe(+/+) and Hfe(-/-) mice in combination with oral iron overload in a model of Salmonella enterica serovar Typhimurium infection, we found animals of either genotype to induce hepcidin antimicrobial peptide expression and hypoferremia following systemic infection in an Hfe-independent manner...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28438977/47-years-of-iai-a-glance-in-the-mirror-and-the-road-ahead
#2
Ferric C Fang
Infection and Immunity was born in January 1970 (1), the same year that the first Ford Pinto rolled off the assembly line.….
April 24, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28387523/species-specific-risk-factors-treatment-decisions-and-clinical-outcomes-for-laboratory-isolates-of-less-common-nontuberculous-mycobacteria-in-washington-state
#3
Emily S Ford, David J Horne, Javeed A Shah, Carolyn K Wallis, Ferric C Fang, Thomas R Hawn
RATIONALE: Nontuberculous mycobacteria are a diverse group of environmental organisms that infrequently cause human disease. Understanding the epidemiologic and clinical characteristics associated with nontuberculous mycobacterial disease is needed to refine diagnostic and treatment strategies, particularly among the less commonly isolated species. OBJECTIVES: To improve knowledge of geographic variance of nontuberculous mycobacteria (NTM) species, to correlate detailed clinical information with isolation of specific NTM, and to examine the decision to treat and outcomes for specific NTM...
April 7, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28195347/characterization-of-ferroptosis-in-murine-models-of-hemochromatosis
#4
Hao Wang, Peng An, Enjun Xie, Qian Wu, Xuexian Fang, Hong Gao, Zhuzhen Zhang, Yuzhu Li, Xudong Wang, Jiaying Zhang, Guoli Li, Lei Yang, Wei Liu, Junxia Min, Fudi Wang
Ferroptosis is a recently identified iron-dependent form of non-apoptotic cell death implicated in brain, kidney, and heart pathology. However, the biological roles of iron and iron metabolism in ferroptosis remain poorly understood. Here, we studied the functional role of iron and iron metabolism in the pathogenesis of ferroptosis. We found that ferric citrate potently induces ferroptosis in murine primary hepatocytes and bone marrow-derived macrophages (BMDMs). Next, we screened for ferroptosis in mice fed a high-iron diet and in mouse models of hereditary hemochromatosis with iron overload...
February 13, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28172666/clinical-impact-and-cost-effectiveness-of-xpert-mtb-rif-testing-in-hospitalized-patients-with-presumptive-pulmonary-tuberculosis-in-the-united-states
#5
James F Cowan, Aldine S Chandler, Elizabeth Kracen, David R Park, Carolyn K Wallis, Emelline Liu, Chao Song, David H Persing, Ferric C Fang
No abstract text is available yet for this article.
February 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28126951/reply-to-on-the-impact-factor-and-the-asm-editorial-policy
#6
Ferric C Fang, Arturo Casadevall
No abstract text is available yet for this article.
February 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28077697/point-counterpoint-what-is-the-optimal-approach-for-detection-of-clostridium-difficile-infection
#7
Ferric C Fang, Christopher R Polage, Mark H Wilcox
INTRODUCTIONIn 2010, we published an initial Point-Counterpoint on the laboratory diagnosis of Clostridium difficile infection (CDI). At that time, nucleic acid amplification tests (NAATs) were just becoming commercially available, and the idea of algorithmic approaches to CDI was being explored. Now, there are numerous NAATs in the marketplace, and based on recent proficiency test surveys, they have become the predominant method used for CDI diagnosis in the United States. At the same time, there is a body of literature that suggests that NAATs lack clinical specificity and thus inflate CDI rates...
March 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27986765/skating-to-where-the-puck-is-going-to-be
#8
EDITORIAL
Robert T Schooley, Ferric C Fang
No abstract text is available yet for this article.
January 1, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27940948/clinical-impact-and-cost-effectiveness-of-xpert-mtb-rif-testing-in-hospitalized-patients-with-presumptive-pulmonary-tuberculosis-in-the-united-states
#9
James F Cowan, Aldine S Chandler, Elizabeth Kracen, David R Park, Carolyn K Wallis, Emelline Liu, Chao Song, David H Persing, Ferric C Fang
BACKGROUND: Microscopic examination of acid-fast stained sputum smears is the current standard of care in the United States to determine airborne infection isolation (AII) of inpatients with presumptive pulmonary tuberculosis (PTB). However, nucleic acid amplification testing (NAAT) with the Xpert® MTB/RIF Assay (Xpert) may be more efficient and less costly. METHOD: This prospective observational cohort study enrolled a consecutive sample of 318 AII-eligible inpatients from a public hospital in Seattle, Washington from March 2012 to October 2013...
December 10, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/27933988/niosomes-consisting-of-tween-60-and-cholesterol-improve-the-chemical-stability-and-antioxidant-activity-of-epigallocatechin-gallate-under-intestinal-tract-conditions
#10
Rong Liang, Ling Chen, Wallace Yokoyama, Peter A Williams, Fang Zhong
In order to improve the chemical stability and antioxidant activity of (-)-epigallocatechin gallate (EGCG) in the gastrointestinal tract, niosomes composed of Tween-60 and cholesterol were developed to encapsulate EGCG in this investigation. EGCG loaded niosomes with encapsulation efficiency around 76% exhibited a small Z-average diameter about 60 nm. Compared to free EGCG, the EGCG remaining in dialysis tubes was significantly improved for niosomes at pH 2 and 7.4. Meanwhile, the residual EGCG for niosomes increased from 3% to 49% after 2 h incubation in simulated intestinal fluid (SIF)...
December 7, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/27892921/an-essential-role-for-bacterial-nitric-oxide-synthase-in-staphylococcus-aureus-electron-transfer-and-colonization
#11
Traci L Kinkel, Smirla Ramos-Montañez, Jasmine M Pando, Daniel V Tadeo, Erin N Strom, Stephen J Libby, Ferric C Fang
Nitric oxide (NO(•)) is a ubiquitous molecular mediator in biology. Many signalling actions of NO(•) generated by mammalian NO(•) synthase (NOS) result from targeting of the haem moiety of soluble guanylate cyclase. Some pathogenic and environmental bacteria also produce a NOS that is evolutionary related to the mammalian enzymes, but a bacterial haem-containing receptor for endogenous enzymatically generated NO(•) has not been identified previously. Here, we show that NOS of the human pathogen Staphylococcus aureus, in concert with an NO(•)-metabolizing flavohaemoprotein, regulates electron transfer by targeting haem-containing cytochrome oxidases under microaerobic conditions to maintain membrane bioenergetics...
November 28, 2016: Nature Microbiology
https://www.readbyqxmd.com/read/27864421/acknowledgment-of-ad-hoc-reviewers
#12
EDITORIAL
Ferric C Fang
No abstract text is available yet for this article.
December 2016: Infection and Immunity
https://www.readbyqxmd.com/read/27834205/rigorous-science-a-how-to-guide
#13
EDITORIAL
Arturo Casadevall, Ferric C Fang
Proposals to improve the reproducibility of biomedical research have emphasized scientific rigor. Although the word "rigor" is widely used, there has been little specific discussion as to what it means and how it can be achieved. We suggest that scientific rigor combines elements of mathematics, logic, philosophy, and ethics. We propose a framework for rigor that includes redundant experimental design, sound statistical analysis, recognition of error, avoidance of logical fallacies, and intellectual honesty...
November 8, 2016: MBio
https://www.readbyqxmd.com/read/27822548/asm-journals-eliminate-impact-factor-information-from-journal-websites
#14
EDITORIAL
Arturo Casadevall, Stefano Bertuzzi, Michael J Buchmeier, Roger J Davis, Harold Drake, Ferric C Fang, Jack Gilbert, Barbara M Goldman, Michael J Imperiale, Philip Matsumura, Alexander J McAdam, Marcela F Pasetti, Rozanne M Sandri-Goldin, Thomas Silhavy, Louis Rice, Jo-Anne H Young, Thomas Shenk
Many scientists attempt to publish their work in a journal with the highest possible journal impact factor (IF). Despite widespread condemnation of the use of journal IFs to assess the significance of published work, these numbers continue to be widely misused in publication, hiring, funding, and promotion decisions (1, 2).
July 2016: MSystems
https://www.readbyqxmd.com/read/27795401/reply-to-improving-microbiology-research-the-problems-are-less-statistical-and-more-biological
#15
Arturo Casadevall, Lee M Ellis, Erika W Davies, Margaret McFall-Ngai, Ferric C Fang
No abstract text is available yet for this article.
October 18, 2016: MBio
https://www.readbyqxmd.com/read/27611332/contemporary-pharyngeal-and-invasive-emm1-and-invasive-emm12-group-a-streptococcus-isolates-exhibit-similar-in-vivo-selection-for-covrs-mutants-in-mice
#16
Wenchao Feng, Mengyao Liu, Daniel G Chen, Rossana Yiu, Ferric C Fang, Benfang Lei
Group A Streptococcus (GAS) causes diverse infections ranging from common pharyngitis to rare severe invasive infections. Invasive GAS isolates can have natural mutations in the virulence regulator CovRS, which result in enhanced expression of multiple virulence genes, suppressed the expression of the protease SpeB, and increased virulence. It is believed that CovRS mutations arise during human infections with GAS carrying wild-type CovRS and are not transmissible. CovRS mutants of invasive GAS of the emm1 genotype arise readily during experimental infection in mice...
2016: PloS One
https://www.readbyqxmd.com/read/27578762/reply-to-funding-by-lottery-political-problems-and-research-opportunities
#17
Arturo Casadevall, Ferric C Fang
No abstract text is available yet for this article.
2016: MBio
https://www.readbyqxmd.com/read/27578761/moonshot-science-risks-and-benefits
#18
EDITORIAL
Arturo Casadevall, Ferric C Fang
Ever since the successful Apollo 11 Moon landing in 1969, a "moonshot" has come to signify a bold effort to achieve a seemingly impossible task. The Obama administration recently called for a moonshot to cure cancer, an initiative that has elicited mixed responses from researchers who welcome additional funding but worry about raising expectations. We suggest that a successful moonshot requires a sufficient understanding of the basic science underlying a problem in question so that efforts can be focused on engineering a solution...
2016: MBio
https://www.readbyqxmd.com/read/27578756/a-framework-for-improving-the-quality-of-research-in-the-biological-sciences
#19
EDITORIAL
Arturo Casadevall, Lee M Ellis, Erika W Davies, Margaret McFall-Ngai, Ferric C Fang
The American Academy of Microbiology convened a colloquium to discuss problems in the biological sciences, with emphasis on identifying mechanisms to improve the quality of research. Participants from various disciplines made six recommendations: (i) design rigorous and comprehensive evaluation criteria to recognize and reward high-quality scientific research; (ii) require universal training in good scientific practices, appropriate statistical usage, and responsible research practices for scientists at all levels, with training content regularly updated and presented by qualified scientists; (iii) establish open data at the timing of publication as the standard operating procedure throughout the scientific enterprise; (iv) encourage scientific journals to publish negative data that meet methodologic standards of quality; (v) agree upon common criteria among scientific journals for retraction of published papers, to provide consistency and transparency; and (vi) strengthen research integrity oversight and training...
2016: MBio
https://www.readbyqxmd.com/read/27565299/extraction-optimization-characterization-and-antioxidant-activity-of-polysaccharide-from-gentiana-scabra-bge
#20
Zhenyu Cheng, Yuewei Zhang, Haiyan Song, Hongli Zhou, Fangli Zhong, Haobin Hu, Yu Feng
In this study, optimization of smashing tissue extraction (STE), preliminary chemical characterization and antioxidant activity in vitro of crude polysaccharides (CPS) from Gentiana scabra bge (G. scabra) were investigated. The optimal extraction conditions were determined as follows: sample particle size of 80mesh, solid/liquid ratio of 1:34, extraction voltage of 157.09V and extraction time of 130.38s. Under these conditions, the extraction yield of CPS had reached 15.03±0.14% (n=3). Chemical composition analysis indicated CPS was mainly composed of mannose, rhamnose, galacturonic acid, glcose, galactose, arabinose and fucose in a molar ratio of 1...
December 2016: International Journal of Biological Macromolecules
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