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https://www.readbyqxmd.com/read/28226464/modulation-of-cardiac-pacemaker-inter-beat-intervals-by-sinoatrial-fibroblasts-a-numerical-study
#1
Ariel Greisas, Sharon Zlochiver, Ariel Greisas, Sharon Zlochiver, Ariel Greisas, Sharon Zlochiver
The potential effect of sinoatrial fibroblasts on beat rate and variability of the cardiac pacemakers is not yet fully understood. Heterocellular coupling formation and fibroblast proliferation during diseased conditions may further signify the impact of those cells on sinoatrial node function. In this study we numerically modeled the impact of varying numbers of fibroblasts that are electrically coupled to a single pacemaker cell on several electrophysiological parameters. We employed cellular kinetics of the rabbit sinoatrial myocyte, and employed a range of potential gap junctional coupling between fibroblasts and myocytes...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223946/tears-falling-on-goosebumps-co-occurrence-of-emotional-lacrimation-and-emotional-piloerection-indicates-a-psychophysiological-climax-in-emotional-arousal
#2
Eugen Wassiliwizky, Thomas Jacobsen, Jan Heinrich, Manuel Schneiderbauer, Winfried Menninghaus
This psychophysiological study is the first to examine the relationship between emotional tears and emotional piloerection (i.e., goosebumps). Although both phenomena have been related to peak states of being moved, details about their temporal occurrence and the associated levels of physiological arousal have remained unknown. In our study, we used emotionally powerful film scenes that were self-selected by participants. Our findings show that even within peak moments of emotional arousal, a gradation of intensity is possible...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28220556/association-between-central-sleep-apnea-and-left-ventricular-structure-the-multi-ethnic-study-of-atherosclerosis
#3
Sogol Javaheri, Ravi K Sharma, David A Bluemke, Susan Redline
We assessed whether the presence of central sleep apnea is associated with adverse left ventricular structural changes. We analysed 1412 participants from the Multi-Ethnic Study of Atherosclerosis who underwent both overnight polysomnography and cardiac magnetic resonance imaging. Subjects had been recruited 10 years earlier when free of cardiovascular disease. Our main exposure is the presence of central sleep apnea as defined by central apnea-hypopnea index = 5 or the presence of Cheyne-Stokes breathing...
February 21, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28217602/health-worker-posting-and-transfer-at-primary-level-in-tamil-nadu-governance-of-a-complex-health-system-function
#4
Surekha Garimella, Kabir Sheikh
BACKGROUND: Posting and transfer (PT) of health personnel - placing the right health workers in the right place at the right time - is a core function of any large-scale health service. In the context of government health services, this may be seen as a simple process of bureaucratic governance and implementation of the rule of law. However the literature from India and comparable low and middle-income country health systems suggests that in reality PT is a contested domain, driven by varied expressions of private and public interest throughout the chain of implementation...
July 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/28210178/a-steep-peripheral-ring-in-irregular-cornea-topography-real-or-an-instrument-error
#5
Alicia Galindo-Ferreiro, Alberto Galvez-Ruiz, Silvana A Schellini, Julio Galindo-Alonso
PURPOSE: To demonstrate that the steep peripheral ring (red zone) on corneal topography after myopic laser in situ keratomileusis (LASIK) could possibly due to instrument error and not always to a real increase in corneal curvature. METHODS: A spherical model for the corneal surface and modifying topography software was used to analyze the cause of an error due to instrument design. This study involved modification of the software of a commercially available topographer...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28207877/selective-inhibition-of-aggregation-fibrillation-of-bovine-serum-albumin-by-osmolytes-mechanistic-and-energetics-insights
#6
Moumita Dasgupta, Nand Kishore
Bovine serum albumin (BSA) is an important transport protein of the blood and its aggregation/fibrillation would adversely affect its transport ability leading to metabolic disorder. Therefore, understanding the mechanism of fibrillation/aggregation of BSA and design of suitable inhibitor molecules for stabilizing its native conformation, are of utmost importance. The qualitative and quantitative aspects of the effect of osmolytes (proline, hydroxyproline, glycine betaine, sarcosine and sorbitol) on heat induced aggregation/fibrillation of BSA at physiological pH (pH 7...
2017: PloS One
https://www.readbyqxmd.com/read/28206742/influence-of-the-mixing-energy-consumption-affecting-coagulation-and-floc-aggregation
#7
Yamuna Srinivasan Vadasarukkai, Graham A Gagnon
The operational significance of energy-intensive rapid mixing processes remains unaddressed in coagulation and flocculation of insoluble precipitates (flocs), which play an important role in the removal of impurities from drinking water supplies. In this study, the influence of rapid mixing and associated mixing energy on floc aggregation was examined for a surface water source characterized by a high fraction of aquatic humic matter. Infrared spectral analyses showed that the colloidal complexes resulting from ligand exchange between iron and dissolved natural organic matter (DOM) were not substantially influenced by the mixing energy input...
February 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28205529/genetic-polymorphism-and-evolutionary-differentiation-of-eastern-chinese-han-a-comprehensive-and-comparative-analysis-on-kirs
#8
Caiyong Yin, Li Hu, Huijie Huang, Yanfang Yu, Zheng Li, Qiang Ji, Xiaochao Kong, Zhongqun Wang, Jinchuan Yan, Jiangwei Yan, Bofeng Zhu, Feng Chen
Killer cell immunoglobulin-like receptor genes, namely KIRs, cluster together within the 160 kb genomic DNA region. In this study, we used PCR-SSP approach and successfully identified the genotype of 17 KIR genes in 123 independent healthy donors residing in the Jiangsu province, China. All individuals were positive at the 7 genes. The observed carrier gene frequencies (OFs) of remaining 10 KIRs ranged from 14.63% (KIR2DS3) to 95.93% (KIR3DL1). We found 27 distinct genotypes excluding KIR1D. The most frequent occurred in 63 individuals (51...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28198757/effect-of-temperature-on-heart-rate-variability-in-neonatal-icu-patients-with-hypoxic-ischemic-encephalopathy
#9
An N Massaro, Heather E Campbell, Marina Metzler, Tareq Al-Shargabi, Yunfei Wang, Adre du Plessis, Rathinaswamy B Govindan
OBJECTIVE: To determine whether measures of heart rate variability are related to changes in temperature during rewarming after therapeutic hypothermia for hypoxic-ischemic encephalopathy. DESIGN: Prospective observational study. SETTING: Level 4 neonatal ICU in a free-standing academic children's hospital. PATIENTS: Forty-four infants with moderate to severe hypoxic-ischemic encephalopathy treated with therapeutic hypothermia...
February 14, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28193222/phosphorylation-dependent-regulation-of-aldh1a1-by-aurora-kinase-a-insights-on-their-synergistic-relationship-in-pancreatic-cancer
#10
Jing Wang, Kumar Nikhil, Keith Viccaro, Lei Chang, Jacoba White, Kavita Shah
BACKGROUND: Epithelial-to-mesenchymal transition (EMT) and cancer stem cell (CSC) formation are key underlying causes that promote extensive metastasis, drug resistance, and tumor recurrence in highly lethal pancreatic cancer. The mechanisms leading to EMT and CSC phenotypes are not fully understood, which has hindered the development of effective targeted therapies capable of improving treatment outcomes in patients with pancreatic cancer. RESULTS: We show a central role of Aurora kinase A (AURKA) in promoting EMT and CSC phenotypes via ALDH1A1, which was discovered as its direct substrate using an innovative chemical genetic screen...
February 13, 2017: BMC Biology
https://www.readbyqxmd.com/read/28191466/prediction-and-analysis-of-key-genes-in-glioblastoma-based-on-bioinformatics
#11
Hao Long, Chaofeng Liang, Xi'an Zhang, Luxiong Fang, Gang Wang, Songtao Qi, Haizhong Huo, Ye Song
Understanding the mechanisms of glioblastoma at the molecular and structural level is not only interesting for basic science but also valuable for biotechnological application, such as the clinical treatment. In the present study, bioinformatics analysis was performed to reveal and identify the key genes of glioblastoma multiforme (GBM). The results obtained in the present study signified the importance of some genes, such as COL3A1, FN1, and MMP9, for glioblastoma. Based on the selected genes, a prediction model was built, which achieved 94...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28188812/epigenetics-in-cancer-fundamentals-and-beyond
#12
REVIEW
Subhankar Biswas, C Mallikarjuna Rao
Activation of oncogenes or the deactivation of tumor suppressor genes has long been established as the fundamental mechanism leading towards carcinogenesis. Although this age old axiom is vastly accurate, thorough study over the last 15years has given us unprecedented information on the involvement of epigenetic in cancer. Various biochemical pathways that are essential towards tumorigenesis are regulated by the epigenetic phenomenons like remodeling of nucleosome by histone modifications, DNA methylation and miRNA mediated targeting of various genes...
February 8, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28186460/vitamin-d-receptor-gene-polymorphisms-metabolic-syndrome-and-type-2-diabetes-in-iranian-subjects-no-association-with-observed-snps
#13
Sakineh Shab-Bidar, Tirang R Neyestani, Abolghassem Djazayery
OBJECTIVE: This study aimed to investigate the associations between metabolic syndrome and type 2 diabetes and the presence of single nucleotide polymorphism of the vitamin D receptor gene in Iranian subjects with type 2 diabetes. SUBJECTS AND METHODS: Overall, 730 Iranian subjects (372 patients and 358 controls) were enrolled in this case-control study. Single nucleotide polymorphisms of the vitamin D receptor gene (FokI, BsmI, ApaI, and TaqI) were genotyped using the restriction fragment length polymorphism method...
February 10, 2017: International Journal for Vitamin and Nutrition Research. Journal International de Vitaminologie et de Nutrition
https://www.readbyqxmd.com/read/28182034/topical-vasodilator-response-in-skeletonized-internal-mammary-artery-is-there-really-a-difference
#14
Syed Raza Shah, Syed Arbab Shah, Muhammad Ahmed Jangda, Mohammad Danial Yaqub, Ayesha Altaf Jangda, Maham Khan, Muhammad Asim Khan, Brian Tomkins
AIM OF THE STUDY: Coronary artery bypass graft surgery is the gold standard for the treatment of multivessel and left main coronary artery disease. However, there is considerable debate that whether left internal mammary artery (IMA) should be taken as pedicled or skeletonized. This study was conducted to assess the difference in blood flow after the application of topical vasodilator in skeletonized and pedicled IMA. MATERIALS AND METHODS: In this study, each patient underwent either skeletonized (n = 25) or pedicled IMA harvesting (n = 25)...
January 2017: Avicenna Journal of Medicine
https://www.readbyqxmd.com/read/28174747/a-disease-associated-microbial-and-metabolomics-state-in-relatives-of-pediatric-inflammatory-bowel-disease-patients
#15
Jonathan P Jacobs, Maryam Goudarzi, Namita Singh, Maomeng Tong, Ian H McHardy, Paul Ruegger, Miro Asadourian, Bo-Hyun Moon, Allyson Ayson, James Borneman, Dermot P B McGovern, Albert J Fornace, Jonathan Braun, Marla Dubinsky
BACKGROUND & AIMS: Microbes may increase susceptibility to inflammatory bowel disease (IBD) by producing bioactive metabolites that affect immune activity and epithelial function. We undertook a family based study to identify microbial and metabolic features of IBD that may represent a predisease risk state when found in healthy first-degree relatives. METHODS: Twenty-one families with pediatric IBD were recruited, comprising 26 Crohn's disease patients in clinical remission, 10 ulcerative colitis patients in clinical remission, and 54 healthy siblings/parents...
November 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28174459/preliminary-reliability-of-the-five-item-physical-activity-questionnaire
#16
Min-Haeng Cho
[Purpose] The purpose of this study was to design a physical activity questionnaire reflecting on the basic principles and recommendations of exercise and to examine its reliability. [Subjects and Methods] 342 males and 374 females from the community centers (senior center, residential culture center, sport center, and YWCA center) participated in this study. [Results] The test-retest reliability of the physical activity questionnaire, measured with an interval of three months, being between 0.61 and 0.91 signifies that the questionnaire was useful instrument for assessing physical activity levels...
December 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28168343/is-infection-the-possible-initiator-of-disc-disease-an-insight-from-proteomic-analysis
#17
S Rajasekaran, Chitraa Tangavel, Siddharth N Aiyer, Sharon Miracle Nayagam, M Raveendran, Naveen Luke Demonte, Pramela Subbaiah, Rishi Kanna, Ajoy Prasad Shetty, K Dharmalingam
STUDY DESIGN: Proteomic and 16S rDNA analysis of disc tissues obtained in vivo. OBJECTIVE: To address the controversy of infection as an aetiology for disc disorders through protein profiling. There is raging controversy over the presence of bacteria in human lumbar discs in vivo, and if they represent contamination or infection. Proteomics can provide valuable insight by identifying proteins signifying bacterial presence and, also host defence response proteins (HDRPs), which will confirm infection...
February 6, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28161647/mineralization-and-biodegradability-enhancement-of-methyl-orange-dye-by-an-effective-advanced-oxidation-process
#18
Jhimli Paul Guin, Y K Bhardwaj, Lalit Varshney
An effective process for the oxidation of Methyl Orange dye (MO) was determined by comparing the mineralization efficiency between two advanced oxidation processes (AOPs) viz., ozonolysis and gamma radiolysis in presence and absence of an added inorganic salt potassium persulfate (K2S2O8). The effects of various operating parameters such as ozone flow rate and reaction temperature were optimized to achieve the best possible mineralization extent of MO by ozonolysis. The mineralization efficiency of MO was significantly enhanced during gamma radiolysis in presence of K2S2O8 (γ+K2S2O8) compared to in absence of K2S2O8...
January 19, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28161569/the-spread-of-artemisinin-resistant-plasmodium-falciparum-in-the-greater-mekong-subregion-a-molecular-epidemiology-observational-study
#19
Mallika Imwong, Kanokon Suwannasin, Chanon Kunasol, Kreepol Sutawong, Mayfong Mayxay, Huy Rekol, Frank M Smithuis, Tin Maung Hlaing, Kyaw M Tun, Rob W van der Pluijm, Rupam Tripura, Olivo Miotto, Didier Menard, Mehul Dhorda, Nicholas P J Day, Nicholas J White, Arjen M Dondorp
BACKGROUND: Evidence suggests that the PfKelch13 mutations that confer artemisinin resistance in falciparum malaria have multiple independent origins across the Greater Mekong subregion, which has motivated a regional malaria elimination agenda. We aimed to use molecular genotyping to assess antimalarial drug resistance selection and spread in the Greater Mekong subregion. METHODS: In this observational study, we tested Plasmodium falciparum isolates from Myanmar, northeastern Thailand, southern Laos, and western Cambodia for PfKelch13 mutations and for Pfplasmepsin2 gene amplification (indicating piperaquine resistance)...
February 1, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28156505/effect-of-supportive-care-consultation-on-reducing-30-day-readmissions-to-oncology-inpatient-services-at-an-academic-hospital
#20
Carl Grey, Dheeraj Kodali, Sijin Wen, Michael D Craig, Alvin Howard Moss
: 181 Background: Decreasing 30-day hospital readmissions is an important quality care measure and signifies high-quality care. This study seeks to identify the benefits of Supportive Care consultations on 30-day readmissions to oncology inpatient services in an academic hospital. METHODS: A retrospective review of all patients that had at least one 30-day readmission to the medical oncology or hematological malignancy service during a 2 year period (2011-2012)...
October 9, 2016: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
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