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https://www.readbyqxmd.com/read/28645089/drug-resistance-mechanism-of-l10f-l10f-n88s-and-l90m-mutations-in-crf01_ae-hiv-1-protease-molecular-dynamics-simulations-and-binding-free-energy-calculations
#1
C S Vasavi, Ramasamy Tamizhselvi, Punnagai Munusami
HIV-1 protease plays a crucial role in viral replication and maturation, which makes it one of the most attractive targets for anti-retroviral therapy. The majority of HIV infections in developing countries are due to non-B subtype. Subtype AE is spreading rapidly and infecting huge population worldwide. The mutations in the active site of subtype AE directly impair the interactions with the inhibitor. The non-active site mutations influence the binding of the inhibitor indirectly and their resistance mechanism is not well understood...
June 8, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28644849/rapid-development-of-cyanobacterial-crust-in-the-field-for-combating-desertification
#2
Chan-Ho Park, Xin Rong Li, Yang Zhao, Rong Liang Jia, Jae-Seoun Hur
Desertification is currently a major concern, and vast regions have already been devastated in the arid zones of many countries. Combined application of cyanobacteria with soil fixing chemicals is a novel method of restoring desertified areas. Three cyanobacteria, Nostoc sp. Vaucher ex Bornet & Flahault, Phormidium sp. Kützing ex Gomont and Scytonema arcangeli Bornet ex Flahault were isolated and tested in this study. Tacki-SprayTM (TKS7), which consists of bio-polysaccharides and tackifiers, was used as a soil fixing agent...
2017: PloS One
https://www.readbyqxmd.com/read/28644529/reciprocal-cooperation-of-phytochemicals-and-micronutrients-against-typical-and-atypical-forms-of-borrelia-spp
#3
Anna Goc, Alexandra Niedzwiecki, Matthias Rath
AIMS: Borrelia spp., a causative pathogenic factor of Lyme disease, has become a major public health threat. Current treatments based on antibiotics often lead to relapse after their withdrawal. Naturally derived substances that could work synergistically to display higher efficacy compared to the individual components may serve as a resource for the development of novel approaches to combat both active and latent forms of Borrelia spp. METHODS AND RESULTS: Using checkerboard assay, we investigated the anti-borreliae reciprocal cooperation of phytochemicals and micronutrients against two species of Borrelia selected as prevalent causes of Lyme disease in the US and Europe...
June 23, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28644123/pin-malposition-in-external-fixator-stabilization-of-combat-related-pelvic-fractures
#4
Mark P Coseo, Dustin J Schuett, Kevin M Kuhn, Joseph Bellamy
The purpose of this study was to compare the accuracy of pin placement in patients with unstable pelvic fractures undergoing either iliac crest or supra-acetabular external fixation. A retrospective review was performed of computed tomography (CT) scans and injury characteristics for all patients presenting to a North Atlantic Treaty Organization Medical Treatment Facility with data entered into the Department of Defense Trauma Registry from January 2008 to October 2013 who underwent pelvic external fixation for unstable pelvic ring injuries...
2017: Journal of Surgical Orthopaedic Advances
https://www.readbyqxmd.com/read/28643475/tailoring-of-physicochemical-properties-of-nanocarriers-for-effective-anti-cancer-applications
#5
REVIEW
Swaroop Chakraborty, Geethanjali S Dhakshinamurthy, Superb K Misra
Nanotechnology has emerged strongly as a viable option to overcome the challenge of early diagnosis and effective drug delivery, for cancer treatment. Emerging research articles have expounded the advantages of using a specific type of nanomaterial-based system called as "nanocarriers," for anti-cancer therapy. The nanocarrier system is used as a transport unit for targeted drug delivery of the therapeutic drug moiety. In order for the nanocarriers to be effective for anticancer therapy, their physicochemical parameter needs to be tuned so that bio-functionalisation can be achieved to a) allow drugs being attached to the substrate and for their controlled release, b) ensure the stability of the nanocarrier up to the point of delivery, and c) clearance of the nanocarrier after the delivery...
June 23, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28643448/post-conditioning-with-metformin-attenuates-apoptotic-events-in-cardiomyoblasts-associated-with-ischemic-reperfusion-injury
#6
Rajesh Ramachandran, Mini S
Ischemic post-conditioning is considered as a potent method to combat ischemic reperfusion injury than pre-conditioning since the latter is non predictive and risky. Rapid initiation of reperfusion with potent anti oxidant compound can be one of the most effective treatments to reduce the infract size and behavioural deficits as a result of ischemic insult. Apoptosis/Necrotic events undisputedly hold significant role in determining the fate of cardiomyocytes post ischemic injury but current studies are speculative regrading the role of post-conditioning in maintaining cellular homeostasis...
June 23, 2017: Cardiovascular Therapeutics
https://www.readbyqxmd.com/read/28643003/recent-developments-in-solution-nuclear-magnetic-resonance-nmr-based-molecular-biology
#7
REVIEW
Joshua J Ziarek, Diego Baptista, Gerhard Wagner
Visualizing post-translational modifications, conformations, and interaction surfaces of protein structures at atomic resolution underpins the development of novel therapeutics to combat disease. As computational resources expand, in silico calculations coupled with experimentally derived structures and functional assays have led to an explosion in structure-based drug design (SBDD) with several compounds in clinical trials. It is increasingly clear that "hidden" transition-state structures along activation trajectories can be harnessed to develop novel classes of allosteric inhibitors...
June 23, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/28642545/high-throughput-screening-of-small-molecule-inhibitors-of-the-streptococcus-quorum-sensing-signal-pathway
#8
Seiji Ishii, Kenji Fukui, Satoshi Yokoshima, Kazuo Kumagai, Youko Beniyama, Tetsuya Kodama, Tohru Fukuyama, Takayoshi Okabe, Tetsuo Nagano, Hirotatsu Kojima, Takato Yano
The main components of the quorum-sensing system are expected to be favorable targets for drug development to combat various chronic infectious diseases. ComA of Streptococcus is an ATP-binding cassette transporter containing a peptidase domain (PEP), which is essential for the quorum-sensing signal production. Using high-throughput screening, we found a potent small molecule that suppressed the S. mutans quorum-sensing pathway through inhibition of PEP activity. The compound effectively attenuated the biofilm formation and competence development of S...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642057/novel-multifunctional-dental-cement-to-prevent-enamel-demineralization-near-orthodontic-brackets
#9
Yansong Ma, Ning Zhang, Michael D Weir, Yuxing Bai, Hockin H K Xu
OBJECTIVES: White spot lesions due to biofilm acid-induced enamel demineralization are prevalent in orthodontic treatments. The aim of this study was to develop a novel bioactive multifunctional cement with protein-repellent, antibacterial and remineralizing capabilities, and investigate the effects on enamel hardness and lesion depth in vitro for the first time. MATERIALS AND METHODS: 2-Methacryloyloxyethyl phosphorylcholine (MPC), dimethylaminohexadecyl methacrylate (DMAHDM), and nanoparticles of amorphous calcium phosphate (NACP) were incorporated into a resin-modified glass ionomer (RMGI)...
June 19, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28641888/oral-vaccination-of-wildlife-against-rabies-differences-among-host-species-in-vaccine-uptake-efficiency
#10
Ad Vos, Conrad M Freuling, Boris Hundt, Christiane Kaiser, Sabine Nemitz, Andreas Neubert, Tobias Nolden, Jens P Teifke, Verena Te Kamp, Reiner Ulrich, Stefan Finke, Thomas Müller
Oral vaccination using attenuated and recombinant rabies vaccines has been proven a powerful tool to combat rabies in wildlife. However, clear differences have been observed in vaccine titers needed to induce a protective immune response against rabies after oral vaccination in different reservoir species. The mechanisms contributing to the observed resistance against oral rabies vaccination in some species are not completely understood. Hence, the immunogenicity of the vaccine virus strain, SPBN GASGAS, was investigated in a species considered to be susceptible to oral rabies vaccination (red fox) and a species refractory to this route of administration (striped skunk)...
June 19, 2017: Vaccine
https://www.readbyqxmd.com/read/28640770/physiological-responses-and-time-motion-analysis-of-small-combat-games-in-kickboxing-impact-of-ring-size-and-number-of-within-round-sparring-partners
#11
Ibrahim Ouergui, Nizar Houcine, Hamza Marzouki, Philip Davis, Emerson Franchini, Nabil Gmada, Ezzedine Bouhlel
Ouergui, I, Houcine, N, Marzouki, H, Davis, P, Franchini, E, Gmada, N, and Bouhlel, E. Physiological responses and time-motion analysis of small combat games in kickboxing: impact of ring size and number of within-round sparring partners. J Strength Cond Res 31(7): 1840-1846, 2017-The study aimed to investigate the physiological responses and time-structure of small combat games (SCGs) in kickboxing according to ring sizes and number of sparring partners. Twenty athletes from regional (n = 13) and national levels (n = 7) participated in the study (mean ± SD, age: 20...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28640037/epidemiology-of-major-depressive-disorder-disability-in-the-us-military-fy-2007-2012
#12
Elizabeth R Packnett, Hoda Elmasry, Christine F Toolin, David N Cowan, Michael R Boivin
This study assesses the incidence of major depressive disorder (MDD) disability discharge and retirement in the Army, Navy, Marine Corps and Air Force and describes MDD comorbidity. Service members with a disability discharge for either MDD (n = 2,882) or any nonpsychiatric disability (n = 56,145), between fiscal years 2007 and 2012, were included in the study population. Those with MDD disability at first evaluation but not at last evaluation were excluded. The incidence of MDD disability discharge increased significantly in the Army and Air Force between fiscal years 2007 and 2012...
June 20, 2017: Journal of Nervous and Mental Disease
https://www.readbyqxmd.com/read/28639913/novel-roles-of-folic-acid-as-redox-regulator-modulation-of-reactive-oxygen-species-sinker-protein-expression-and-maintenance-of-mitochondrial-redox-homeostasis-on-hepatocellular-carcinoma
#13
Kun-Goung Lai, Chi-Fen Chen, Chun-Te Ho, Jun-Jen Liu, Tsan-Zon Liu, Chi-Liang Chern
We provide herein several lines of evidence to substantiate that folic acid (or folate) is a micronutrient capable of functioning as a novel redox regulator on hepatocellular carcinoma. First, we uncovered that folate deficiency could profoundly downregulate two prominent anti-apoptotic effectors including survivin and glucose-regulated protein-78. Silencing of either survivin or glucose-regulated protein-78 via small interfering RNA interfering technique established that both effectors could serve as reactive oxygen species sinker proteins...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28639106/time-to-selected-quit-date-and-subsequent-rates-of-sustained-smoking-abstinence
#14
George L Anesi, Scott D Halpern, Michael O Harhay, Kevin G Volpp, Kathryn Saulsgiver
In efforts to combat tobacco dependence, most smoking cessation programs offer individuals who smoke the choice of a target quit date. However, it is uncertain whether the time to the selected quit date is associated with participants' chances of achieving sustained abstinence. In a pre-specified secondary analysis of a randomized clinical trial of four financial-incentive programs or usual care to encourage smoking cessation (Halpern et al. in N Engl J Med 372(22):2108-2117, doi: 10.1056/NEJMoa1414293 , 2015), study participants were instructed to select a quit date between 0 and 90 days from enrollment...
June 21, 2017: Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28638846/the-pandemic-h30-subclone-of-sequence-type-131-st131-as-the-leading-cause-of-multidrug-resistant-escherichia-coli-infections-in-the-united-states-2011-2012
#15
James R Johnson, Stephen Porter, Paul Thuras, Mariana Castanheira
BACKGROUND: Extraintestinal Escherichia coli infections are increasingly challenging due to emerging antimicrobial resistance, including resistance to extended-spectrum beta-lactams and fluoroquinolones. Sequence type 131 (ST131) is a leading contributor. METHODS: Three hundred sixty E. coli clinical isolates from across the United States (2011-2012), selected randomly from the SENTRY collection within 3 resistance categories (extended-spectrum cephalosporin [ECS]-reduced susceptibility [RS]; fluoroquinolone-resistant, ESC-susceptible; and fluoroquinolone-susceptible, ESC-susceptible) were typed for phylogroup, sequence type complex (STc), subsets thereof, virulence genotype, O type, and beta-lactamase genes...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28638517/writing-well-the-long-term-effect-on-empathy-observation-and-physician-writing-through-a-residency-writers-workshop
#16
Megan Lemay, John Encandela, Lisa Sanders, Anna Reisman
BACKGROUND: Writing narratives during medical training can provide a way to derive meaning from challenging experiences, enhance reflection, and combat burnout. The Yale Internal Medicine Residency Writers' Workshop, an annual 2-day intensive workshop followed by faculty-guided writing revision and publication, has been training resident physicians in the craft of writing since 2003. OBJECTIVE: The study aimed to assess the long-term effects of a craft-focused writers' workshop for residents on empathy, observation skills, and future writing...
June 2017: Journal of Graduate Medical Education
https://www.readbyqxmd.com/read/28638106/protective-efficacy-of-the-trivalent-pseudomonas-aeruginosa-vaccine-candidate-pcrv-opri-hcp1-in-murine-pneumonia-and-burn-models
#17
Feng Yang, Jiang Gu, Liuyang Yang, Chen Gao, Haiming Jing, Ying Wang, Hao Zeng, Quanming Zou, Fenglin Lv, Jinyong Zhang
Pseudomonas aeruginosa is a formidable pathogen that is responsible for a diverse spectrum of human infectious diseases, resulting in considerable annual mortality rates. Because of biofilm formation and its ability of rapidly acquires of resistance to many antibiotics, P. aeruginosa related infections are difficult to treat, and therefore, developing an effective vaccine is the most promising method for combating infection. In the present study, we designed a novel trivalent vaccine, PcrV28-294-OprI25-83-Hcp11-162 (POH), and evaluated its protective efficacy in murine pneumonia and burn models...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28638069/global-profiling-of-phytohormone-dynamics-during-combined-drought-and-pathogen-stress-in-arabidopsis-thaliana-reveals-aba-and-ja-as-major-regulators
#18
Aarti Gupta, Hiroshi Hisano, Yuko Hojo, Takakazu Matsuura, Yoko Ikeda, Izumi C Mori, Muthappa Senthil-Kumar
Global transcriptome studies demonstrated the existence of unique plant responses under combined stress which are otherwise not seen during individual stresses. In order to combat combined stress plants use signaling pathways and 'cross talk' mediated by hormones involved in stress and growth related processes. However, interactions among hormones' pathways in combined stressed plants are not yet known. Here we studied dynamics of different hormones under individual and combined drought and pathogen infection in Arabidopsis thaliana by liquid chromatography-mass spectrometry (LC-MS) based profiling...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637750/interplay-of-pa-x-and-ns1-proteins-in-replication-and-pathogenesis-of-a-temperature-sensitive-2009-pandemic-h1n1-influenza-a-virus
#19
Aitor Nogales, Laura Rodriguez, Marta L DeDiego, David J Topham, Luis Martínez-Sobrido
Influenza A viruses (IAVs) cause seasonal epidemics and occasional pandemics, representing a serious public health concern. It has been described that one mechanism used by some IAV strains to escape the host innate immune responses and modulate virus pathogenicity involves the ability of PA-X and NS1 proteins to inhibit the host protein synthesis in infected cells. It was reported that for the 2009 pandemic H1N1 IAV (pH1N1) only the PA-X protein has this inhibiting capability while the NS1 protein did not...
June 21, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28637411/venom-peptides-and-toxins-a-prospective-spearhead-in-cancer-treatment
#20
Janet Pik Ching Wong, Bin Li, Hang Fai Kwok
Cancer is a condition of genetically or environmentally mutated, uncontrollable cell growth that directly affects human morbidity and mortality. Many treatments have been adopted to reduce cancer cell proliferation; however, new mutated developments of some cancer cells have started to show resistance towards current therapies and treatments that cause some drugs to lose their efficacy. Additionally, deleterious side-effects of some hard application methods like radiation therapy, chemotherapy, and surgery are less favorable...
June 21, 2017: Combinatorial Chemistry & High Throughput Screening
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