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https://www.readbyqxmd.com/read/28428174/klotho-an-anti-aging-molecule-attenuates-oxidant-induced-alveolar-epithelial-cell-mtdna-damage-and-apoptosis
#1
Seok-Jo Kim, Paul Cheresh, Mesut Eren, Renea P Jablonski, Anjana Yeldandi, Karen M Ridge, Gr Scott Budinger, Dong-Hyun Kim, Myles S Wolf, Douglas Vaughan, David W Kamp
Alveolar epithelial cell (AEC) apoptosis and inadequate repair resulting from 'exaggerated' lung aging and mitochondrial dysfunction are critical determinants promoting lung fibrosis. α-Klotho, which is an anti-aging molecule that is expressed predominantly in the kidney and secreted in the blood, can protect lung epithelial cells against hyperoxia-induced apoptosis. We reasoned that Klotho protects AEC exposed to oxidative stress in part by maintaining mitochondrial DNA (mtDNA) integrity and mitigating apoptosis...
April 20, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28412081/nasopharyngeal-polymicrobial-colonization-during-health-viral-upper-respiratory-infection-and-upper-respiratory-bacterial-infection
#2
Qingfu Xu, Jareth Wischmeyer, Eduardo Gonzalez, Michael E Pichichero
OBJECTIVES: We sought to understand how polymicrobial colonization varies during health, viral upper respiratory infection (URI) and acute upper respiratory bacterial infection to understand differences in infection-prone vs. non- prone patients. METHODS: Nasopharyngeal (NP) samples were collected from 74 acute otitis media (AOM) infection-prone and 754 non-prone children during 2094 healthy visits, 673 viral URI visits and 631 AOM visits. Three otopathogens Streptococcus pneumoniae (Spn), Nontypeable Haemophilus influenzae (NTHi), and Moraxella catarrhalis (Mcat) were identified by culture...
April 13, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28405943/myocardial-oxidative-stress-correlates-with-left-ventricular-dysfunction-on-strain-echocardiography-in-a-rodent-model-of-sepsis
#3
Bereketeab Haileselassie, Erik Su, Iraklis Pozios, Diego F Niño, Hongyun Liu, Dai-Yin Lu, Ioannis Ventoulis, William B Fulton, Chhinder P Sodhi, David Hackam, Brian O'Rourke, Theodore Abraham
BACKGROUND: Recognition of cardiomyopathy in sepsis can be challenging due to the limitations of conventional measures such as ejection fraction (EF) and fractional shortening (FS) in the context of variable preload and afterload conditions. This study correlates myocardial function using strain echocardiography (SE) with cardiomyocyte oxidative stress in a murine model of sepsis. METHODS: C57BL/6J mice were randomized into control (n = 10), sham (n = 25), and a cecal ligation and puncture (CLP) (n = 33) model of sepsis...
December 2017: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/28389429/integrating-concepts-in-biology-textbook-increases-learning-assessment-triangulation-using-concept-inventory-card-sorting-and-mcat-instruments-followed-by-longitudinal-tracking
#4
Douglas B Luckie, Anne-Marie Hoskinson, Caleigh E Griffin, Andrea L Hess, Katrina J Price, Alex Tawa, Samantha M Thacker
The purpose of this study was to examine the educational impact of an intervention, the inquiry-focused textbook Integrating Concepts in Biology (ICB), when used in a yearlong introductory biology course sequence. Student learning was evaluated using three published instruments: 1) The Biology Concept Inventory probed depth of student mastery of fundamental concepts in organismal and cellular topics when confronting misconceptions as distractors. ICB students had higher gains in all six topic categories (+43% vs...
2017: CBE Life Sciences Education
https://www.readbyqxmd.com/read/28365122/derivation-and-genome-wide-association-study-of-a-principal-component-based-measure-of-heat-tolerance-in-dairy-cattle
#5
N P P Macciotta, S Biffani, U Bernabucci, N Lacetera, A Vitali, P Ajmone-Marsan, A Nardone
Heat stress represents a key factor that negatively affects the productive and reproductive performance of farm animals. In the present work, a new measure of tolerance to heat stress for dairy cattle was developed using principal component analysis. Data were from 590,174 test-day records for milk yield, fat and protein percentages, and somatic cell score of 39,261 Italian Holstein cows. Test-day records adjusted for main systematic factors were grouped into 11 temperature-humidity index (THI) classes. Daughter trait deviations (DTD) were calculated for 1,540 bulls as means of the adjusted test-day records for each THI class...
March 29, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28343349/modernizing-quality-of-life-assessment-development-of-a-multidimensional-computerized-adaptive-questionnaire-for-patients-with-schizophrenia
#6
Pierre Michel, Karine Baumstarck, Christophe Lancon, Badih Ghattas, Anderson Loundou, Pascal Auquier, Laurent Boyer
OBJECTIVE: Quality of life (QoL) is still assessed using paper-based and fixed-length questionnaires, which is one reason why QoL measurements have not been routinely implemented in clinical practice. Providing new QoL measures that combine computer technology with modern measurement theory may enhance their clinical use. The aim of this study was to develop a QoL multidimensional computerized adaptive test (MCAT), the SQoL-MCAT, from the fixed-length SQoL questionnaire for patients with schizophrenia...
March 25, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28253986/mitochondrial-targeted-catalase-extended-longevity-and-the-roles-in-various-disease-models
#7
D-F Dai, Y-A Chiao, G M Martin, D J Marcinek, N Basisty, E K Quarles, P S Rabinovitch
The free-radical theory of aging was proposed more than 50 years ago. As one of the most popular mechanisms explaining the aging process, it has been extensively studied in several model organisms. However, the results remain controversial. The mitochondrial version of free-radical theory of aging proposes that mitochondria are both the primary sources of reactive oxygen species (ROS) and the primary targets of ROS-induced damage. One critical ROS is hydrogen peroxide, which is naturally degraded by catalase in peroxisomes or glutathione peroxidase within mitochondria...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28178916/development-of-an-interdisciplinary-pre-matriculation-program-designed-to-promote-medical-students-self-efficacy
#8
Anna Wirta Kosobuski, Abigail Whitney, Andrew Skildum, Amy Prunuske
BACKGROUND AND OBJECTIVES: A four-week interdisciplinary pre-matriculation program for Native American and rural medical students was created and its impact on students' transition to medical school was assessed. The program extends the goals of many pre-matriculation programs by aiming to increase not only students' understanding of basic science knowledge, but also to build student self-efficacy through practice with medical school curricular elements while developing their academic support networks...
2017: Medical Education Online
https://www.readbyqxmd.com/read/28178271/tead-transcription-factors-are-required-for-normal-primary-myoblast-differentiation-in-vitro-and-muscle-regeneration-in-vivo
#9
Shilpy Joshi, Guillaume Davidson, Stéphanie Le Gras, Shuichi Watanabe, Thomas Braun, Gabrielle Mengus, Irwin Davidson
The TEAD family of transcription factors (TEAD1-4) bind the MCAT element in the regulatory elements of both growth promoting and myogenic differentiation genes. Defining TEAD transcription factor function in myogenesis has proved elusive due to overlapping expression of family members and their functional redundancy. We show that silencing of either Tead1, Tead2 or Tead4 did not effect primary myoblast (PM) differentiation, but that their simultaneous knockdown strongly impaired differentiation. In contrast, Tead1 or Tead4 silencing impaired C2C12 differentiation showing their different contributions in PMs and C2C12 cells...
February 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28130937/developing-new-online-calibration-methods-for-multidimensional-computerized-adaptive-testing
#10
Ping Chen, Chun Wang, Tao Xin, Hua-Hua Chang
Multidimensional computerized adaptive testing (MCAT) has received increasing attention over the past few years in educational measurement. Like all other formats of CAT, item replenishment is an essential part of MCAT for its item bank maintenance and management, which governs retiring overexposed or obsolete items over time and replacing them with new ones. Moreover, calibration precision of the new items will directly affect the estimation accuracy of examinees' ability vectors. In unidimensional CAT (UCAT) and cognitive diagnostic CAT, online calibration techniques have been developed to effectively calibrate new items...
February 2017: British Journal of Mathematical and Statistical Psychology
https://www.readbyqxmd.com/read/28127127/factors-associated-with-performance-in-an-internal-medicine-clerkship
#11
Colleen Colbert, Tresa McNeal, Maybelline Lezama, Martha Chandler, Lisa Forrester, Austin Metting, Curtis Mirkes, Holly Van Cleave, Sonny Win, John D Myers
The purpose of this retrospective study was to examine the relationship between demographic and educational variables and student performance on an internal medicine (IM) clerkship in order to target areas for educational intervention and potential early remediation. This study examined data associated with third-year medical student performance (N = 505) during the IM clerkship at Baylor Scott & White, Temple/Texas A&M Health Science Center College of Medicine from 2005 to 2011. Multiple regression analysis (N = 341) showed that a model containing the following variables was significantly associated with scores on the National Board of Medical Examiners (NBME) subject exam, accounting for 46...
January 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/27798818/an-evaluation-of-outcomes-following-the-replacement-of-traditional-histology-laboratories-with-self-study-modules
#12
Andrew R Thompson, D J Lowrie
Changes in medical school curricula often require educators to develop teaching strategies that decrease contact hours while maintaining effective pedagogical methods. When faced with this challenge, faculty at the University of Cincinnati College of Medicine converted the majority of in-person histology laboratory sessions to self-study modules that utilize multiple audiovisual modalities and a virtual microscope platform. Outcomes related to this shift were investigated through performance on in-house examinations, results of the United States Medical Licensing Examination(®) (USMLE(®) ) Step 1 Examination, and student feedback...
October 31, 2016: Anatomical Sciences Education
https://www.readbyqxmd.com/read/27738569/a-predictive-model-for-usmle-step-1-scores
#13
Christin Giordano, David Hutchinson, Richard Peppler
PURPOSE: The United States Medical Licensing Examination (USMLE) Step 1 plays a pivotal role in one's residency application. While prior literature has investigated which factors influence performance on the examination, the authors sought to include factors such as performance on a well-used question bank and financial need to develop a predictive model. METHOD : After obtaining institutional review board approval, the authors surveyed two consecutive second-year medical school classes and correlated the data to the students' Step 1 and National Board of Medical Examiners (NBME) Comprehensive Basic Science Examination (CBSE) scores...
September 7, 2016: Curēus
https://www.readbyqxmd.com/read/27722975/activity-recognition-for-diabetic-patients-using-a-smartphone
#14
Božidara Cvetković, Vito Janko, Alfonso E Romero, Özgür Kafalı, Kostas Stathis, Mitja Luštrek
Diabetes is a disease that has to be managed through appropriate lifestyle. Technology can help with this, particularly when it is designed so that it does not impose an additional burden on the patient. This paper presents an approach that combines machine-learning and symbolic reasoning to recognise high-level lifestyle activities using sensor data obtained primarily from the patient's smartphone. We compare five methods for machine-learning which differ in the amount of manually labelled data by the user, to investigate the trade-off between the labelling effort and recognition accuracy...
December 2016: Journal of Medical Systems
https://www.readbyqxmd.com/read/27702431/do-mcat-scores-predict-usmle-scores-an-analysis-on-5-years-of-medical-student-data
#15
Jacqueline L Gauer, Josephine M Wolff, J Brooks Jackson
INTRODUCTION: The purpose of this study was to determine the associations and predictive values of Medical College Admission Test (MCAT) component and composite scores prior to 2015 with U.S. Medical Licensure Exam (USMLE) Step 1 and Step 2 Clinical Knowledge (CK) scores, with a focus on whether students scoring low on the MCAT were particularly likely to continue to score low on the USMLE exams. METHOD: Multiple linear regression, correlation, and chi-square analyses were performed to determine the relationship between MCAT component and composite scores and USMLE Step 1 and Step 2 CK scores from five graduating classes (2011-2015) at the University of Minnesota Medical School (N=1,065)...
2016: Medical Education Online
https://www.readbyqxmd.com/read/27662606/impact-of-anatomy-boot-camp-on-students-in-a-medical-gross-anatomy-course
#16
Patrick J Herling, B Tanya Mohseni, Derek C Hill, Stacy Chelf, Jeffrey A Rickert, Jonathan T Leo, Natalie R Langley
Lincoln Memorial University-DeBusk College of Osteopathic Medicine (LMU-DCOM) offers an optional three-week summer Anatomy Boot Camp course (ABC) to facilitate students' transition into medical school and promote retention of anatomy subject matter. The pre-matriculation program is a supplemental instruction course that utilizes a small group learning format. Boot camp instruction is led by teaching assistants and two anatomy professors. Enrollees gain early exposure to Medical Gross Anatomy (MGA) course subject matter, which is taught in the fall semester, and learn study skills necessary to excel in medical school...
September 23, 2016: Anatomical Sciences Education
https://www.readbyqxmd.com/read/27645401/induction-of-triglyceride-accumulation-and-mitochondrial-maintenance-in-muscle-cells-by-lactate
#17
Jingquan Sun, Xin Ye, Minhao Xie, Jianping Ye
Muscle exercise induces intramuscular triglyceride (TG) accumulation and promotes mitochondrial maintenance in myotubes. However, the mechanism underlying exercise effects remains unknown. In this study, lactic acid was tested as a signaling molecule in C2C12 myotubes to understand the mechanism. Intracellular TG storage was induced in the cells by sodium lactate. The lactate activity was observed with an inhibition of the cAMP-PKA pathway as indicated by a reduction in the phosphorylation status of CREB (pCREB)...
September 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27629749/a-preliminary-clinical-comparison-of-the-use-of-fascia-lata-allograft-and-autogenous-connective-tissue-graft-in-multiple-gingival-recession-coverage-based-on-the-tunnel-technique
#18
COMPARATIVE STUDY
Wojciech Bednarz, Jacek Żurek, Thomas Gedrange, Marzena Dominiak
BACKGROUND: The most effective method for treating gingival recessions (GR) is with an autogenous connective tissue graft (CTG) via flap surgery. Often, however, the amount of CTG that can be grafted is insufficient to cover all of a patient's gingival recessions at one time. OBJECTIVES: The objective of this study was to provide a 6-month comparative assessment of the results of covering multiple Miller Class I and II gingival recessions with a Fascia Lata Allograft (FL) and a CTG harvested from palatal mucosa...
May 2016: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/27598417/in-vitro-investigation-of-crosstalk-between-fatty-acid-and-polyketide-synthases-in-the-andrimid-biosynthetic-assembly-line
#19
Fumihiro Ishikawa, Hiroyasu Sugimoto, Hideaki Kakeya
Andrimid (Adm) synthase, which belongs to the type II system of enzymes, produces Adm in Pantoea agglomerans. The adm biosynthetic gene cluster lacks canonical acyltransferases (ATs) to load the malonyl group to acyl carrier proteins (ACPs), thus suggesting that a malonyl-CoA ACP transacylase (MCAT) from the fatty acid synthase (FAS) complex provides the essential AT activity in Adm biosynthesis. Here we report that an MCAT is essential for catalysis of the transacylation of malonate from malonyl-CoA to AdmA polyketide synthase (PKS) ACP in vitro...
September 6, 2016: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/27575890/overexpression-of-catalase-in-mice-reduces-age-related-oxidative-stress-and-maintains-sperm-production
#20
Johanna Selvaratnam, Bernard Robaire
Advanced paternal age is associated with increased complications in pregnancy and genetic diseases in offspring. Oxidative stress is a major contributor to the damage accumulated in sperm during aging. Complex networks of antioxidants regulate reactive oxygen species (ROS) in the testis. While mounting evident shows that redox dysfunction compromises the quality of developing male germ cells, the mechanisms by which aging causes this remain unclear. Furthermore, therapies to successfully alleviate aging-associated loss in germ cell quality are limited...
November 2016: Experimental Gerontology
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