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https://www.readbyqxmd.com/read/29786862/experimental-fluence-modulated-proton-computed-tomography-by-pencil-beam-scanning
#1
George Dedes, Robert P Johnson, Mark Pankuch, Nick Detrich, Willemijn M A Pols, Simon Rit, Reinhard W Schulte, Katia Parodi, Guillaume Landry
PURPOSE: This experimental study is aimed at demonstrating, using a simple cylindrical water phantom, the feasibility of fluence modulated proton computed tomography (FMpCT) by pencil beam scanning (PBS) proton computed tomography (pCT). METHODS: The phase II pCT prototype of the Loma Linda U. and U. C. Santa Cruz was operated using the PBS beam line of the Northwestern Medicine Chicago Proton Center. A 20x10 grid of 1.37 cm full width half maximum pencil beams (PB) equally spaced by 1 cm was used to acquire 45 projections in step and shoot mode...
May 22, 2018: Medical Physics
https://www.readbyqxmd.com/read/29786796/techniques-for-evaluation-of-ar-transcriptional-output-and-recruitment-to-dna
#2
Manqi Zhang, William C Krause, Irina U Agoulnik
Steroid receptors are ligand activated transcription factors whose promoter specificity is regulated by a broad set of coregulators and pioneer factors. Corepressors and coactivators determine receptors' recruitment to specific regulatory elements and ultimately their transcriptional output. Using androgen receptor (AR) and NCOR1 corepressor as examples, this chapter describes experimental approaches to evaluate recruitment of steroid receptors and their coregulators to DNA and to determine coregulator contribution to the transcriptional output of the receptor...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29785760/thyroid-function-in-hidradenitis-suppurativa-a-population-based-cross-sectional-study-from-denmark
#3
I M Miller, G Vinding, H A Sørensen, H Rytgaard, U B Mogensen, C Ellervik, G B Jemec
BACKGROUND: Hidradenitis suppurativa (HS) is a chronic inflammatory disease. Numerous studies have associated HS with obesity, and recently with metabolic syndrome (MetS). Both obesity and MetS are linked with metabolic changes. Thyroid hormones play a central role in metabolism and exert pleiotropic effects on adipogenesis and the basal metabolism of lipids and glucose. We hypothesized that patients with HS have an altered or dysfunctional metabolism expressed as thyroid function. AIM: To investigate thyroid function in individuals with HS compared with healthy controls (HCs)...
May 21, 2018: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/29785630/calcium-channels-rho-kinase-protein-kinase-c-and-phospholipase-c-pathways-mediate-mercury-chloride-induced-myometrial-contractions-in-rats
#4
Swati Koli, Atul Prakash, Soumen Choudhury, Rajesh Mandil, Satish K Garg
Adverse effects of mercury on female reproduction are reported; however, its effect on myogenic activity of uterus and mechanism thereof is obscure. Present study was undertaken to unravel the mechanistic pathways of mercuric chloride (HgCl2 )-induced myometrial contraction in rats. Isometric tension in myometrial strips of rats following in vitro exposure to HgCl2 was recorded using data acquisition system-based physiograph. HgCl2 produced concentration-dependent (10 nM-100 μM) uterotonic effect which was significantly (p < 0...
May 21, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29785084/impact-of-virtual-reality-simulation-on-learning-barriers-of-phacoemulsification-perceived-by-residents
#5
Danny Siu-Chun Ng, Zihan Sun, Alvin Lerrmann Young, Simon Tak-Chuen Ko, Jerry Ka-Hing Lok, Timothy Yuk-Yau Lai, Shameema Sikder, Clement C Tham
Objective: To identify residents' perceived barriers to learning phacoemulsification surgical procedures and to evaluate whether virtual reality simulation training changed these perceptions. Design: The ophthalmology residents undertook a simulation phacoemulsification course and proficiency assessment on the Eyesi system using the previously validated training modules of intracapsular navigation, anti-tremor, capsulorrhexis, and cracking/chopping. A cross-sectional, multicenter survey on the perceived difficulties in performing phacoemulsification tasks on patients, based on the validated International Council of Ophthalmology's Ophthalmology Surgical Competency Assessment Rubric (ICO-OSCAR), using a 5-point Likert scale (1 = least and 5 = most difficulty), was conducted among residents with or without prior simulation training...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29784969/north-american-domestic-pigs-are-susceptible-to-experimental-infection-with-japanese-encephalitis-virus
#6
So Lee Park, Yan-Jang S Huang, Amy C Lyons, Victoria B Ayers, Susan M Hettenbach, D Scott McVey, Kenneth R Burton, Stephen Higgs, Dana L Vanlandingham
Japanese encephalitis virus (JEV) is a mosquito-borne flavivirus that is capable of causing encephalitic diseases in children. While humans can succumb to severe disease, the transmission cycle is maintained by viremic birds and pigs in endemic regions. Although JEV is regarded as a significant threat to the United States (U.S.), the susceptibility of domestic swine to JEV infection has not been evaluated. In this study, domestic pigs from North America were intravenously challenged with JEV to characterize the pathological outcomes...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784885/-pseudomonas-aeruginosa-regulated-intramembrane-proteolysis-rip-protease-mucp-can-overcome-mutations-in-the-algo-periplasmic-protease-to-restore-alginate-production-in-nonmucoid-revertants
#7
Camila Delgado, Laura Florez, Ivonne Lollett, Christine Lopez, Shiva Kangeyan, Hansi Kumari, Marios Stylianou, Robert J Smiddy, Lisa Schneper, Robert T Sautter, George Szatmari, Kalai Mathee
The progression of cystic fibrosis (CF) from an acute to a chronic disease is often associated with the conversion of the opportunistic pathogen Pseudomonas aeruginosa from a nonmucoid form to a mucoid form in the lung. This conversion involves the overproduction of the exopolysaccharide alginate, whose production is under control of the AlgT/U sigma factor. This factor is regulated posttranslationally by an extremely unstable process and has been commonly attributed to mutations in the algT/U gene. By exploiting this unstable phenotype, we isolated 34 spontaneous nonmucoid variants arising from the mucoid strain PDO300, a PAO1 derivative containing the mucA22 allele commonly found in mucoid CF isolates...
May 21, 2018: Journal of Bacteriology
https://www.readbyqxmd.com/read/29784792/abrupt-global-ocean-anoxia-during-the-late-ordovician-early-silurian-detected-using-uranium-isotopes-of-marine-carbonates
#8
Rick Bartlett, Maya Elrick, James R Wheeley, Victor Polyak, André Desrochers, Yemane Asmerom
Widespread marine anoxia is hypothesized as the trigger for the second pulse of the Late Ordovician (Hirnantian) mass extinction based on lithologic and geochemical proxies that record local bottom waters or porewaters. We test the anoxia hypothesis using δ238 U values of marine limestones as a global seawater redox proxy. The δ238 U trends at Anticosti Island, Canada, document an abrupt late Hirnantian ∼0.3‰ negative shift continuing through the early Silurian indicating more reducing seawater conditions...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29784508/il-33-mast-cell-axis-is-central-in-ll-37-induced-bladder-inflammation-and-pain-in-a-murine-interstitial-cystitis-model
#9
M Martin Jensen, Wanjian Jia, Austin J Schults, Xiangyang Ye, Glenn D Prestwich, Siam Oottamasathien
Interstitial cystitis (IC), also known as painful bladder syndrome (PBS), is a debilitating chronic condition that afflicts over 3 million women above the age of 18 in the U.S., and most patients fail to respond to current treatment options. Mast cells have previously been implicated as both a diagnostic and prognostic marker in IC/PBS. Patients with IC/PBS have been shown to have elevated levels of IL-33, a cytokine released in response to tissue insult, in their urine. We hypothesize that mast cell-mediated inflammation induced from IL-33 may play an important role in initiating pain and inflammation in IC/PBS...
May 18, 2018: Cytokine
https://www.readbyqxmd.com/read/29784373/alpha-fetoprotein-assessment-by-using-a-nano-optical-sensor-thin-film-binuclear-pt-2-aminobenzimidazole-bipyridine-for-early-diagnosis-of-liver-cancer
#10
M S Attia, A O Youssef, Ziya A Khan, M N Abou-Omar
A simple, precise and sensitive method in which, a nano optical sensor binuclear Pt-2-aminobenzimidazole-bipyridine, Pt(abi)(bpy) complex doped in sol gel is used for the early diagnosis of liver cancer. The idea depends on the assessment of the concentration of alpha fetoprotein (AFP) in the serum samples of different liver patients. The nano binuclear Pt(abi)(bpy) has strong emission spectrum upon excitation at 380 nm in distilled water. The assessment of alpha fetoprotein (AFP) depends on the quenching of the emission spectrum of the optical sensor at 610 nm in water by the alpha fetoprotein (AFP)...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29784306/enzymatic-hydrolysis-of-flaxseed-linum-usitatissimum-l-protein-and-sensory-characterization-of-maillard-reaction-products
#11
Chao-Kun Wei, Kiran Thakur, Dun-Hua Liu, Jian-Guo Zhang, Zhao-Jun Wei
We aimed to simplify the enzymolysis process for flaxseed protein hydrolysates production as Maillard reaction products (MRPs) to generate different flavor characteristics. More than 50% activity of immobilized enzymes (Alcalase and Flavourzyme) was retained after repeated use. Subsequently, after five weeks, the activities of the immobilized enzymes were also observed to be higher after storage at 4 °C. The optimum conditions for production of flaxseed protein hydrolysates using sequential enzymatic hydrolysis were as follow: 3,000 U/g of Alcalase at 60 °C and pH 8...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29783967/characterization-of-a-novel-thermostable-and-xylose-tolerant-gh-39-%C3%AE-xylosidase-from-dictyoglomus-thermophilum
#12
Qi Li, Tao Wu, Zhipeng Qi, Linguo Zhao, Jianjun Pei, Feng Tang
BACKGROUND: β-D-xylosidase is a vital exoglycosidase with the ability to hydrolyze xylooligosaccharides to xylose and to biotransform some saponins by cleaving outer β-xylose. β-D-xylosidase is widely used as one of the xylanolytic enzymes in a diverse range of applications, such as fuel, food and the pharmaceutical industry; therefore, more and more studies have focused on the thermostable and xylose-tolerant β-D-xylosidases. RESULTS: A thermostable β-xylosidase gene (xln-DT) of 1509 bp was cloned from Dictyoglomus thermophilum and expressed in E...
May 21, 2018: BMC Biotechnology
https://www.readbyqxmd.com/read/29783822/-evaluations-of-newborn-screening-program-performance-and-enzymatic-diagnosis-of-glucose-6-phosphate-dehydrogenase-deficiency-in-guangzhou
#13
F Tang, Y L Huang, X Jiang, X F Jia, B Li, Y Feng, Q Y Chen, C F Tang
Objective: To reveal the molecular epidemiologic characteristics of glucose-6-phosphate dehydrogenase (G6PD) gene and to evaluate based on the genetic analysis the newborn screening program performance and enzymatic diagnosis of G6PD deficiency in Guangzhou. Methods: G6PD enzyme activities were measured by quantitative fluorescence assay in dry blood spots of 16 319 newborns(8 725 males, 7 594 females) 3-7 days after birth in Guangzhou Newborn Center. They were born in Guangzhou form Oct. 1 to 20, 2016. The cutoff value of G6PD was less than 2...
May 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29783820/-efficacy-of-bronchoalveolar-lavage-and-its-influence-factors-in-the-treatment-of-mycoplasma-pneumoniae-pneumonia-with-atelectasis
#14
M Yang, D H Yang, X Yang, Y S Wang, L Wu, Z M Chen
Objective: To investigate the efficacy of bronchoalveolar lavage (BAL) and its influence factors in the treatment of Mycoplasma pneumoniae pneumonia (MPP) with atelectasis. Methods: A retrospective case control study was performed on hospitalized MPP patients with atelectasis and received BAL in the Department of Pulmonology, Children's Hospital Zhejiang University School of Medicine from January 1, 2015 to July 31, 2017. Fever relieved in 48 hours and chest imaging improved in one week after BAL were considered effective...
May 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29783819/-value-of-urine-soluble-triggering-receptor-expressed-on-myeloid-cells-1-in-the-early-diagnosis-of-sepsis-associated-acute-kidney-injury
#15
Z K Yuan, F Fang, C J Liu, J Li, Y F Chen, F Xu
Objective: To assess the value of urine soluble triggering receptor expressed on myeloid cells-1(sTREM-1) in early diagnosis and prognosis of sepsis associated acute kidney injury (AKI). Methods: This was a case-control study. A total of 62 patients with sepsis during November 2016 to June 2017 were collected, who were divided into non-AKI sepsis ( n= 49) and AKI sepsis ( n= 13) groups according to the serum creatinine (SCr) or urine output, sepsis with shock ( n= 22) and sepsis without shock ( n= 40) groups according to the presence of shock, survival ( n= 47) and death ( n= 15) groups according to the mortality...
May 2, 2018: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/29782995/efficacy-of-antipsychotics-in-dementia-depended-on-the-definition-of-patients-and-outcomes-a-meta-epidemiological-study
#16
REVIEW
C H W Smeets, S U Zuidema, T A Hulshof, M Smalbrugge, D L Gerritsen, R T C M Koopmans, H J Luijendijk
OBJECTIVE: Postulating that efficacy of antipsychotics for agitation and psychosis in dementia is best estimated in trials among patients with these symptoms and with symptom-specific outcomes, we investigated whether clinically broader definitions affected the pooled efficacy. STUDY DESIGN AND SETTING: Trials were searched in multiple databases and categorized according to patient population (agitated, psychotic, mixed) and outcome scale (agitation, psychosis, generic)...
May 18, 2018: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/29782332/detection-of-high-risk-thrombophilia-with-an-automated-global-test-the-coagulation-inhibitor-potential-assay
#17
Barbara Réger, Hajna Losonczy, Ágnes Nagy, Ágnes Péterfalvi, Réka Mózes, László Pótó, Nelli Farkas, Gábor L Kovács, Attila Miseta, Alizadeh Hussain, Orsolya Tóth
: The diagnosis of thrombophilia is a cost-consuming and time-consuming process, as each defect should be separately investigated. The Coagulation Inhibitor Potential (CIP) assay is a promising new global test, sensitive for most of the hereditary thrombophilias, developed for manual methodology. We adapt the original method to an optical coagulation analyser. By this automation, the test will be easier, faster and more precise, and it also allows carrying out 18 measurements simultaneously. The CIP assay was performed in 126 healthy subjects and 193 patients with different types of hereditary thrombophilia conditions...
May 17, 2018: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/29782185/trends-in-maternity-care-practice-skin-to-skin-contact-indicators-united-states-2007-2015
#18
Ellen O Boundy, Cria G Perrine, Chloe M Barrera, Ruowei Li, Heather C Hamner
BACKGROUND: Mother-infant skin-to-skin contact (SSC) immediately after birth helps transition infants to the post-uterine environment and increases the likelihood of breastfeeding initiation and duration. This study examines trends in U.S. maternity practices related to SSC, and variations by facility demographics. METHODS: Data were from the Maternity Practices in Infant Nutrition and Care (mPINC) surveys (2007-2015), a biennial assessment of all U.S. maternity facilities...
May 21, 2018: Breastfeeding Medicine: the Official Journal of the Academy of Breastfeeding Medicine
https://www.readbyqxmd.com/read/29781870/pregnancy-and-the-apoptotic-pathway-in-experimental-melanoma
#19
Anamaria S Facina, Gil Facina, Ismael D C Guerreiro da Silva, Silvana A A Corrêa, Sandra M Alexandre, Ângela F Logullo, Jorge K Hosomi, Mary U Nakamura
Pregnancy-associated melanoma is defined as melanoma diagnosed during pregnancy or within 1 year of delivery. The association of pregnancy with melanoma is well known, but its underlying molecular mechanisms of association are poorly understood. The aim was to assess the expression of apoptosis-related genes in melanoma tumors during pregnancy in an attempt to elucidate the molecular mechanisms underlying apoptosis-driven activation of melanoma cells in this period. Mice were allocated across two experimental groups (nonpregnant and pregnant) and implanted with the melanoma cell line BF16-F10...
May 17, 2018: Melanoma Research
https://www.readbyqxmd.com/read/29781549/administration-of-platelets-to-ruptured-abdominal-aortic-aneurysm-patients-before-open-surgery-a-prospective-single-blinded-randomised-study
#20
T B Lunen, P I Johansson, L P Jensen, K M Homburg, O C Roeder, L Lonn, N H Secher, U Helgstrand, M Carstensen, K B Jensen, T Lange, H Sillesen, F Swiatek, H B Nielsen
BACKGROUND: In patients undergoing open surgery for a ruptured abdominal aortic aneurysm (rAAA), survivors demonstrate a high platelet count, and proactive administration of platelets (and fresh frozen plasma) appears to influence mortality. OBJECTIVES: This trial investigated the effect of platelets administered before transport to surgery. METHODS: In a prospective study design, patients were randomised to receive platelets (intervention; n = 61) or no platelets (control; n = 61) before transport to vascular surgery from 11 local hospitals...
May 21, 2018: Transfusion Medicine
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