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https://www.readbyqxmd.com/read/28822812/determinants-of-thermostability-in-the-cytochrome-p450-fold
#1
REVIEW
Kurt L Harris, Raine E S Thomson, Silja J Strohmaier, Yosephine Gumulya, Elizabeth M J Gillam
Cytochromes P450 are found throughout the biosphere in a wide range of environments, serving a multitude of physiological functions. The ubiquity of the P450 fold suggests that it has been co-opted by evolution many times, and likely presents a useful compromise between structural stability and conformational flexibility. The diversity of substrates metabolized and reactions catalyzed by P450s makes them attractive starting materials for use as biocatalysts of commercially useful reactions. However, process conditions impose different requirements on enzymes to those in which they have evolved naturally...
August 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28820066/mutational-impact-on-the-interaction-between-human-il27-and-gp130-in-silico-approach-for-defending-hiv-infection
#2
Arundhati Banerjee, Rakhi Dasgupta, Sujay Ray
INTRODUCTION: With advances in proteomics, it is essential to investigate the molecular-level participation of IL27 and gp130 to hinder HIV infection. Their interaction causes cell-cycle arrest in HIV+ cells by activating the receptor-associated JAK signaling and causing apoptosis of cancerous cells. METHODOLOGY: The best human wild-type WT_IL27 model was prepared after varied molecular modeling techniques. The vital tyrosine residues in WT_IL27 were identified, mutated and IL27 was re-modeled...
August 17, 2017: Current HIV Research
https://www.readbyqxmd.com/read/28819300/yebc-a-putative-transcriptional-factor-involved-in-the-regulation-of-the-proteolytic-system-of-lactobacillus
#3
Lucía Brown, Josefina M Villegas, Mariano Elean, Silvina Fadda, Fernanda Mozzi, Lucila Saavedra, Elvira M Hebert
The proteolytic system of Lactobacillus plays an essential role in bacterial growth, contributes to the flavor development of fermented products, and can release bioactive health-beneficial peptides during milk fermentation. In this work, a genomic analysis of all genes involved in the proteolytic system of L. delbrueckii subsp. lactis CRL 581 was performed. Genes encoding the cell envelope-associated proteinase, two peptide transport systems, and sixteen peptidases were identified. The influence of the peptide supply on the transcription of 23 genes involved in the proteolytic system of L...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819089/follow-up-practices-of-surgeons-and-medical-oncologists-in-australia-and-new-zealand-following-resection-of-esophagogastric-cancers
#4
Tim Chew, Tim Bright, Timothy J Price, David I Watson, Peter G Devitt
PURPOSE: Follow-up practices for patients who have undergone surgical resection of esophagogastric malignancies are variable and poorly documented. To better understand practice, a questionnaire was used to survey surgeons and medical oncologists to determine whether any consensus exists. METHODS: An opt-in online questionnaire was sent to esophagogastric surgeons and medical oncologists via the membership lists for the Australian and New Zealand Gastric and Oesophageal Surgery Association (ANZGOSA), the Australian Gastro-Intestinal Trials Groups (AGITG), and the Medical Oncology Group of Australia (MOGA)...
August 15, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28818705/hormone-replacement-therapy-after-risk-reducing-salpingo-oophorectomy-minimises-endocrine-and-sexual-problems-a-prospective-study
#5
Ravi F M Vermeulen, Marc van Beurden, Jacobien M Kieffer, Eveline M A Bleiker, Heiddis B Valdimarsdottir, Leon F A G Massuger, Marian J E Mourits, Katja N Gaarenstroom, Eleonora B L van Dorst, Hans W H M van der Putten, Neil K Aaronson
BACKGROUND: There has been some doubts raised in earlier studies about the efficacy of hormone replacement therapy (HRT) in reducing endocrine and sexual problems in women who have undergone a risk-reducing salpingo-oophorectomy (RRSO). METHODS: In this prospective, observational study, we recruited 178 premenopausal women with a high risk for ovarian cancer. Fifty-seven women opted for RRSO and 121 for gynaecological screening (GS). Women completed questionnaires before surgery (T1) and 3 (T2) and 9 (T3) months post surgery, or at equivalent time points for the GS-group...
August 14, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28818419/a-school-based-brand-marketing-program-s-adherence-to-federal-nutrition-criteria
#6
Alyssa J Moran, Eric B Rimm, Elsie M Taveras
INTRODUCTION: The Healthy, Hunger-Free Kids Act of 2010 gave the U.S. Department of Agriculture authority to regulate school wellness policies, which include nutritional standards for foods advertised in schools. Brand marketing programs, which encourage students to purchase a company's products in exchange for money or rewards, were not explicitly prohibited. This study assesses the nutritional quality of products participating in "Box Tops for Education" ("Box Tops"), one of the largest national brand marketing programs in schools...
August 14, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28818324/the-treatment-of-segmental-tibial-fractures-does-patient-preference-differ-from-surgeon-choice
#7
Z Little, T O Smith, S E McMahon, C Cooper, A Trompeter, M Pearse, S Britten, B Rogers, H Sharma, B Narayan, M Costa, D J Beard, C B Hing
INTRODUCTION: Segmental tibial fractures are complex injuries with a prolonged recovery time. Current definitive treatment options include intramedullary fixation or a circular external fixator. However, there is uncertainty as to which surgical option is preferable and there are no sufficiently rigorous multi-centre trials that have answered this question. The objective of this study was to determine whether patient and surgeon opinion was permissive for a randomised controlled trial (RCT) comparing intramedullary nailing to the application of a circular external fixator...
August 9, 2017: Injury
https://www.readbyqxmd.com/read/28815277/discontinuation-rate-and-adverse-events-after-1%C3%A2-year-of-vaginal-pessary-use-in-women-with-pelvic-organ-prolapse
#8
Theerarat Yimphong, Teerayut Temtanakitpaisan, Pranom Buppasiri, Chompilas Chongsomchai, Supparaluck Kanchaiyaphum
INTRODUCTION AND HYPOTHESIS: To ascertain the rate of discontinuation after vaginal pessary use among pelvic organ prolapse patients. METHODS: We enrolled women suffering from pelvic organ prolapse who opted to use vaginal pessary as the first line of treatment and were fitted with a pessary at the urogynecological clinic in Khon Kaen University's Srinagarind Hospital (Thailand) during the period between 2010 and 2016. Patients' medical records were retrospectively reviewed...
August 16, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28814526/hiv-1-exploits-dynamic-multi-aminoacyl-trna-synthetase-complex-to-enhance-viral-replication
#9
Alice A Duchon, Corine St-Gelais, Nathan Titkemeier, Joshua Hatterschide, Li Wu, Karin Musier-Forsyth
A hallmark of retroviruses such as human immunodeficiency virus type 1 (HIV-1) is reverse transcription of genomic RNA to DNA, a process that is primed by cellular tRNAs. HIV-1 recruits human tRNA(Lys3) to serve as the reverse transcription primer via an interaction between lysyl-tRNA synthetase (LysRS) and the HIV-1 Gag polyprotein. LysRS is normally sequestered in a multi-aminoacyl-tRNA synthetase complex (MSC). Previous studies demonstrated that components of the MSC can be mobilized in response to certain cellular stimuli, but how LysRS is redirected from the MSC to viral particles for packaging is unknown...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28814216/opting-for-rural-practice-the-influence-of-medical-student-origin-intention-and-immersion-experience
#10
Denese Playford, Hanh Ngo, Surabhi Gupta, Ian B Puddey
OBJECTIVE: To compare the influence of rural background, rural intent at medical school entry, and Rural Clinical School (RCS) participation on the likelihood of later participation in rural practice. DESIGN: Analysis of linked data from the Medical School Outcomes Database Commencing Medical Students Questionnaire (CMSQ), routinely collected demographic information, and the Australian Health Practitioner Regulation Agency database on practice location. SETTING AND PARTICIPANTS: University of Western Australia medical students who completed the CMSQ during 2006-2010 and were practising medicine in 2016...
August 21, 2017: Medical Journal of Australia
https://www.readbyqxmd.com/read/28812222/ethics-and-phishing-experiments
#11
David B Resnik, Peter R Finn
Phishing is a fraudulent form of email that solicits personal or financial information from the recipient, such as a password, username, or social security or bank account number. The scammer may use the illicitly obtained information to steal the victim's money or identity or sell the information to another party. The direct costs of phishing on consumers are exceptionally high and have risen substantially over the past 12 years. Phishing experiments that simulate real world conditions can provide cybersecurity experts with valuable knowledge they can use to develop effective countermeasures and prevent people from being duped by phishing emails...
August 15, 2017: Science and Engineering Ethics
https://www.readbyqxmd.com/read/28811776/role-of-ramadan-specific-diabetes-education-rsde-a-prospective-study
#12
Muhammad Yakoob Ahmedani, Shahid Ahsan, Muhammad Saif Ul Haque
OBJECTIVE: To observe the role of Ramadan Specific Diabetes Education (RSDE) in the management of fasting patients with diabetes. METHODS: This prospective study was carried out at out-patients department (OPD) of Baqai Institute of Diabetology & Endocrinology (BIDE), in 2012. Recruitment of patients started a month prior to Ramadan. Muslim patients with diabetes whether had their first or on follow up visit to the OPD and showed intention to hold fast in the month of Ramadan, were included...
May 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28810904/antiarrhythmic-drug-therapy-among-patients-presenting-to-emergency-department-with-symptomatic-atrial-fibrillation-a-prospective-nationwide-cohort
#13
Tero Penttilä, Heikki Mäkynen, Juha Hartikainen, Harri Hyppölä, Timo Lauri, Mika Lehto, Juha Lund, M J Pekka Raatikainen
BACKGROUND: Atrial fibrillation (AF) is a common arrhythmia that causes numerous visits to emergency departments (ED). The aim of the FinFib2 study was to evaluate whether treatment of patients with AF in ED is consistent with the contemporary European Society of Cardiology (ESC) management guidelines. Here we report the results of antiarrhythmic drug therapy (AAD) in ED. METHODS: All patients within the two-week study period whose primary reason for the ED visit was symptomatic AF were included into this prospective multicentre study...
August 15, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/28810843/trial-of-labour-or-elective-repeat-caesarean-delivery-are-women-making-an-informed-decision-at-kenyatta-national-hospital
#14
Phocas Biraboneye S, Omondi Ogutu, Jos van Roosmalen, Samson Wanjala, Kizito Lubano, John Kinuthia
BACKGROUND: Trial of labour is a safe option for most women after one previous caesarean delivery. However, the proportion of women attempting trial of labour after previous caesarean delivery (TOLAC) has been declining in many countries. In addition, women with prior caesarean delivery appear to know little regarding their mode of delivery and healthcare providers' recommendations. The doctors' preferences exert a strong influence on patient's decision whether or not to pursue TOLAC...
August 15, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28810713/co-opted-megasatellite-dna-drives-evolution-of-secondary-night-vision-in-azara-s-owl-monkey
#15
Akihiko Koga, Hideyuki Tanabe, Yuriko Hirai, Hiroo Imai, Masanori Imamura, Takao Oishi, Roscoe Stanyon, Hirohisa Hirai
Owl monkeys (genus Aotus) are the only taxon in simian primates that consists of nocturnal or otherwise cathemeral species. Their night vision is superior to that of other monkeys, apes, and humans but not as good as that of typical nocturnal mammals. This incomplete night vision has been used to conclude that these monkeys only secondarily adapted to a nocturnal lifestyle, or to their cathemeral lifestyle that involves high night-time activity. It is known that the rod cells of many nocturnal mammals possess a unique nuclear architecture in which heterochromatin is centrally located...
July 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28809878/partially-coherent-sources-with-circular-coherence-comment
#16
Milo W Hyde, Santasri R Bose-Pillai
In [Opt. Lett.42, 1512 (2017)OPLEDP0146-959210.1364/OL.42.001512], the authors present a new class of non-uniformly correlated sources with circular coherence. They also describe a basic experimental setup for synthesizing this class of sources, which uses the Van Cittert-Zernike theorem. Here, we present an alternative way to analyze these sources and a different way to generate them.
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28807372/accuracy-of-orthopantomography-for-apical-periodontitis-without-endodontic-treatment
#17
Cosimo Nardi, Linda Calistri, Silvia Pradella, Isacco Desideri, Chiara Lorini, Stefano Colagrande
INTRODUCTION: This study aimed to evaluate the diagnostic accuracy of orthopantomography (OPT) for the detection of clinically/surgically confirmed apical periodontitis (AP) without endodontic treatment using cone-beam computed tomographic (CBCT) imaging as the reference standard. METHODS: One hundred twenty patients without endodontically treated AP (diseased group) were detected via CBCT imaging using the periapical index system. They were divided into groups of 10 each according to the size of the lesion (2-4...
August 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28806908/changing-the-default-for-tobacco-cessation-treatment-in-an-inpatient-setting-study-protocol-of-a-randomized-controlled-trial
#18
Babalola Faseru, Edward F Ellerbeck, Delwyn Catley, Byron J Gajewski, Taneisha S Scheuermann, Theresa I Shireman, Laura M Mussulman, Niaman Nazir, Terry Bush, Kimber P Richter
BACKGROUND: Most health care providers do not treat tobacco dependence routinely. This may in part be due to the treatment "default." Current treatment guidelines recommend that providers (1) ask patients if they are willing to quit and (2) provide cessation-focused medications and counseling only to smokers who state that they are willing to quit. The default is that patients have to "opt in" to receive cessation assistance: providers ask smokers if they are willing to quit, and only offer medications and cessation support to those who say "yes...
August 14, 2017: Trials
https://www.readbyqxmd.com/read/28806199/does-late-hip-dysplasia-occur-after-normal-ultrasound-screening-in-breech-babies
#19
Andrew R Morris, Joanna M C Thomas, Isabel C Reading, Nicholas M P Clarke
BACKGROUND: Recent literature has raised concern regarding the occurrence of late dysplasia after normal screening in breech babies. One paper states a late dysplasia incidence of 29%. This finding is in contrast with other published work, which suggests breech presentation is predictive of spontaneous stabilization of the unstable neonatal hip. We decided to identify the rate of late dysplasia after normal screening in our patient cohort and also to investigate the use of a prophylactic abduction diaper...
August 11, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28804934/complicated-untreated-apical-periodontitis-causing-paraesthesia-a-case-report
#20
Domenico Ricucci, Simona Loghin, José F Siqueira
The purpose of this article was to report a case of untreated apical periodontitis resulting in severe late complications. A patient with an asymptomatic crowned root canal-treated mandibular molar revealing a radiographic substandard endodontic treatment and a slight periapical radiolucency was made aware of the treatment options and opted for no treatment. The lesion slightly increased in size after 6 years, but the tooth remained asymptomatic and endodontic retreatment was again refused. After 4 more years, the patient presented with an abscess and severe pain, complicated by paraesthesia of the left chin and lip...
August 14, 2017: Australian Endodontic Journal: the Journal of the Australian Society of Endodontology Inc
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