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L M M Iglecias, M A M Puga, M A Pompílio, S A Teles, J Croda, L A Lima, B V Lago, R M B Martins, A R C Motta-Castro
BACKGROUND: Due to environmental and social conditions inherent to incarceration, tuberculosis (TB) and hepatitis B virus (HBV) are major diseases among prison inmates. OBJECTIVE: To determine overall and occult HBV infection (OBI) prevalence rates, risk factors and genotype distribution among inmates with active TB. STUDY DESIGN: A cross-sectional study was conducted among 216 inmates with active TB recruited at the largest prisons in Campo Grande, Mato Grosso do Sul, Central Brazil...
November 2016: International Journal of Tuberculosis and Lung Disease
Andrea T Obi, Elizabeth Andraska, Yogendra Kanthi, Catherine E Luke, Megan Elfline, Suresh Madathilparambil, Teruna J Siahaan, Farouc A Jaffer, Thomas W Wakefield, Krishnan Raghavendran, Peter K Henke
BACKGROUND/AIMS: Pneumonia is a significant risk factor for the development of venous thrombosis (VT). Cell-adhesion molecules (CAMs) are linked to the pathogenesis of both pneumonia and VT. We hypothesized that remote infection would confer a prothrombogenic milieu via systemic elevation of CAMs. METHODS: Lung injury was induced in wild-type (C57BL/6) mice by lung contusion or intratracheal inoculation with Klebsiella pneumoniae or saline controls. K. pneumoniae-treated mice and controls additionally underwent inferior vena cava (IVC) ligation to generate VT...
October 22, 2016: Journal of Vascular Research
Shelby Resnick, Kenji Inaba, Efstathios Karamanos, Dimitra Skiada, James A Dollahite, Obi Okoye, Peep Talving, Demetrios Demetriades
INTRODUCTION: A daily Chest X-ray (CXR) is obtained in many surgical intensive care units (SICU). This study implemented a selective CXR protocol in a high volume, academic SICU and evaluated its impact on clinical outcomes. METHODS: All SICU patients admitted in 2/2010 were compared with patients admitted in 2/2012. Between the time periods, a protocol eliminating the routine daily CXRs was instituted. RESULTS: In 02/2010 and 02/2012, 107 and 90 patients were admitted to the SICU, respectively, for a total of 1384 patient days...
October 10, 2016: American Journal of Surgery
Kihong Son, Jin Sung Kim, Hoyeon Lee, Seungryong Cho
This study investigates dose distribution due to kV cone-beam computed tomography (CBCT) for the patients undergoing CBCT-based image-guided radiation therapy (IGRT). The kV-CBCT provides an efficient image-guidance tool for acquiring the latest volumetric image of a patient's anatomy, and has been being routinely used in clinics for an accurate treatment setup. Imaging radiation doses resulting from six different acquisition protocols of the on-board imager (OBI) were calculated using a Geant4 Application for Tomographic Emission (GATE) Monte Carlo simulation toolkit, and the absorbed doses by various organs were analyzed for the adult and pediatric numerical XCAT phantoms in this study...
October 20, 2016: Radiation Protection Dosimetry
Lawrence Lechuga, Georg A Weidlich
A comparison of image quality and dose delivered between two differing computed tomography (CT) imaging modalities-fan beam and cone beam-was performed. A literature review of quantitative analyses for various image quality aspects such as uniformity, signal-to-noise ratio, artifact presence, spatial resolution, modulation transfer function (MTF), and low contrast resolution was generated. With these aspects quantified, cone beam computed tomography (CBCT) shows a superior spatial resolution to that of fan beam, while fan beam shows a greater ability to produce clear and anatomically correct images with better soft tissue differentiation...
September 12, 2016: Curēus
Paul Zolkind, Gavin P Dunn, Tianxiang Lin, Malachi Griffith, Obi L Griffith, Ravindra Uppaluri
The recent success of immunotherapies has demonstrated the potency of tumor-specific immune cells in mediating tumor rejection and generating durable tumor immunity. Our understanding of the scientific basis of these responses results from the confluence of a better comprehension of the cancer immunoediting process and the revolution in next generation sequencing of cancer genomes. Recent evidence suggests that T cell specificity for cancer cell expressed mutant proteins - termed neoantigens - is an important component of immune mediated tumor rejection...
October 14, 2016: Oral Oncology
Nicole Robbins, Michaela Spitzer, Wenliang Wang, Nicholas Waglechner, Dhruv J Patel, Jonathan S O'Brien, Linda Ejim, Obi Ejim, Mike Tyers, Gerard D Wright
Natural products are invaluable historic sources of drugs for infectious diseases; however, the discovery of novel antimicrobial chemical scaffolds has waned in recent years. Concurrently, there is a pressing need for improved therapeutics to treat fungal infections. We employed a co-culture screen to identify ibomycin, a large polyketide macrolactone that has preferential killing activity against Cryptococcus neoformans. Using chemical and genome methods, we determined the structure of ibomycin and identified the biosynthetic cluster responsible for its synthesis...
October 7, 2016: Cell Chemical Biology
Yoshitsugu Obi, Danh V Nguyen, Elani Streja, Matthew B Rivara, Connie M Rhee, Wei Ling Lau, Yanjun Chen, Csaba P Kovesdy, Rajnish Mehrotra, Kamyar Kalantar-Zadeh
Conventional albumin-corrected calcium is inaccurate in predicting ionized calcium, and hidden hypercalcemia, characterized as high ionized calcium with normal total calcium, is associated with higher mortality in hemodialysis patients. By using a national cohort of hemodialysis patients in the Unites States, a novel laboratory-specific prediction equation comprised of total calcium, albumin, and phosphorus was derived from 242 patients in the South Atlantic division (adjusted R(2)  = 0.80 vs. 0.71 for the conventional equation), and then validated among 566 patients in the other divisions (adjusted R(2)  = 0...
October 7, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Nicolás Weiss, Khalid El Tayeb El Obied, Jeroen Kalkman, Rob G H Lammertink, Ton G van Leeuwen
We report on localized and simultaneous measurement of biofilm growth and local hydrodynamics in a microfluidic channel using optical coherence tomography. We measure independently with high spatio-temporal resolution the longitudinal flow velocity component parallel to the imaging beam and the transverse flow velocity component perpendicular to the imaging beam. Based on the measured velocities we calculate the shear-rates in the flow channel. We show the relation between the measured biofilm structure and flow velocities as biofilm growth progresses over the course of 48 hours...
September 1, 2016: Biomedical Optics Express
Temidayo D Popoola, Olufunsho Awodele, Adeola Omisanya, Nkechinyerem Obi, Chioma Umezinwa, Amos A Fatokun
ETHNOPHARMACOLOGICAL RELEVANCE: Phytochemicals with anti-oxidative and anti-inflammatory properties are known to inhibit tumour initiation, promotion and progression. Hence, there is an increasingly-convincing rationale for employing remedies containing those phytochemicals in the treatment of cancers and also as analgesic and anti-inflammatory adjuvants in therapy. The plants Garcinia kola Heckel (Clusiaceae), stem bark; Uvaria chamae P. Beauv. (Annonaceae), root; and Olax subscorpioidea Oliv...
September 26, 2016: Journal of Ethnopharmacology
Benjamin J Ainscough, Malachi Griffith, Adam C Coffman, Alex H Wagner, Jason Kunisaki, Mayank Nk Choudhary, Joshua F McMichael, Robert S Fulton, Richard K Wilson, Obi L Griffith, Elaine R Mardis
No abstract text is available yet for this article.
September 29, 2016: Nature Methods
Sarah E R Bailey, Obi C Ukoumunne, Elizabeth Shephard, Willie Hamilton
BACKGROUND: Although the association between raised platelet count (thrombocytosis) and cancer has been reported in primary and secondary care studies, UK GPs are unaware of it, and it is insufficiently evidenced for laboratories to identify and warn of it. This systematic review aimed to identify and collate evidence from studies that have investigated thrombocytosis as an early marker of cancer in primary care. METHODS: EMBASE (OvidSP), Medline (Ovid), Web of Science and The Cochrane Library were searched for relevant studies...
September 28, 2016: Family Practice
Obi L Griffith, Szeman Ruby Chan, Malachi Griffith, Kilannin Krysiak, Zachary L Skidmore, Jasreet Hundal, Julie A Allen, Cora D Arthur, Daniele Runci, Mattia Bugatti, Alexander P Miceli, Heather Schmidt, Lee Trani, Krishna-Latha Kanchi, Christopher A Miller, David E Larson, Robert S Fulton, William Vermi, Richard K Wilson, Robert D Schreiber, Elaine R Mardis
Estrogen receptor alpha-positive (ERα+) luminal tumors are the most frequent subtype of breast cancer. Stat1(-/-) mice develop mammary tumors that closely recapitulate the biological characteristics of this cancer subtype. To identify transforming events that contribute to tumorigenesis, we performed whole genome sequencing of Stat1(-/-) primary mammary tumors and matched normal tissues. This investigation identified somatic truncating mutations affecting the prolactin receptor (PRLR) in all tumor and no normal samples...
September 27, 2016: Cell Reports
Samaneh Abbasi, Manoochehr Makvandi, Gharib Karimi, Niloofar Neisi
BACKGROUND: The SEN virus (SENV) is a prevalent blood borne pathogen that has a worldwide incidence. SENV is comprised of eight genotypes; genotypes H and D are frequently associated with the pathogenesis of non-A - E hepatitis and post-transfusion hepatitis in blood donors and hepatitis patients. So far, no SENV pathogenesis has been reported in the liver biopsies of SENV carriers, but the frequency of SENV and its related genotypes requires further molecular epidemiology studies in different regions of the world...
July 2016: Jundishapur Journal of Microbiology
Nico Lelie, Roberta Bruhn, Michael Busch, Marion Vermeulen, Wai-Chiu Tsoi, Steven Kleinman
BACKGROUND: Twenty-two users of individual donation nucleic acid amplification technology (ID-NAT) in six geographical regions provided detailed hepatitis B virus (HBV) infection data in first-time, lapsed, and repeat donations and classified confirmed HBV-positive donors into different infection categories. These data were used to compare the clinical sensitivity of hepatitis B surface antigen (HBsAg) and HBV-DNA testing. STUDY DESIGN AND METHODS: In total 10,981,776 donations from South Africa, Egypt, the Mediterranean, North and Central Europe, South East Asia, and Oceania were screened for HBV-DNA using the Ultrio assay (Grifols/Hologic) and for HBsAg using a chemiluminescence immunoassay, and 9455 HBV-infected donations were identified...
September 27, 2016: Transfusion
Yusuke Sakaguchi, Takayuki Hamano, Chikako Nakano, Yoshitsugu Obi, Isao Matsui, Yasuo Kusunoki, Daisuke Mori, Tatsufumi Oka, Nobuhiro Hashimoto, Yoshitsugu Takabatake, Atsushi Takahashi, Jun-Ya Kaimori, Toshiki Moriyama, Ryohei Yamamoto, Masaru Horio, Ken Sugimoto, Koichi Yamamoto, Hiromi Rakugi, Yoshitaka Isaka
BACKGROUND: The Agatston score, commonly used to quantify coronary artery calcification (CAC), is determined by the plaque area and density. Despite an excellent predictability of the Agatston score for cardiovascular events, the density of CAC has never been studied in patients with pre-dialysis chronic kidney disease (CKD). This study aimed to analyze the CAC density and its association with serum mineral levels in CKD. METHODS: We enrolled patients with pre-dialysis CKD who had diabetes mellitus, prior cardiovascular disease history, elevated low-density lipoprotein cholesterol levels, or smoking history...
2016: PloS One
Areej I Alshayea, Gamal E Eid, Malak M El-Hazmi, Abdulkarim F Alhetheel
OBJECTIVES: To evaluate the prevalence of occult hepatitis B viral infections (OBIs)  among blood donors considering the clinical and epidemiological importance of identifying OBIs. METHODS: A cross-sectional study conducted at King Khalid University Hospital, Riyadh, Saudi Arabia between January 2011 and January 2012. Blood donors (n=8501) were screened for Hepatitis B virus surface antigen (HBsAg) and hepatitis B core antibodies (HBcAb). All HBsAg-negative and HBcAb-positive samples were tested further for hepatitis B surface antibodies (HBsAb), hepatitis B virus (HBV)-DNA, and HBV genotyping...
October 2016: Saudi Medical Journal
Sudesh Deshpande, Deepak Dhote, Kalpna Thakur, Amol Pawar, Rajesh Kumar, Munish Kumar, M S Kulkarni, S D Sharma, V Kannan
The objective of this work was to measure patient eye lens dose for different cone-beam computed tomography (CBCT) acquisition protocols of Varian's On-Board Imaging (OBI) system using optically stimulated luminescence dosimeter (OSLD) and to study the variation in eye lens dose with patient geometry and distance of isocenter to the eye lens. During the experimental measurements, OSLD was placed on the patient between the eyebrows of both eyes in line of nose during CBCT image acquisition to measure eye lens doses...
July 2016: Journal of Medical Physics
Benjamin Jacobs, Andrea Obi, Thomas Wakefield
OBJECTIVE: Venous thromboembolism (VTE) is a common disease with serious, often fatal sequelae. The optimal strategy for diagnosis of VTE remains unclear, although considerable progress has been made in this area. Several new biomarkers have showed promise for diagnosis of VTE, and more are under active investigation. We reviewed the literature for studies evaluating these diagnostic biomarkers. METHODS: We reviewed the English literature between 1990 and 2015, searching for papers evaluating diagnostic performance of biomarkers in VTE...
October 2016: Journal of Vascular Surgery. Venous and Lymphatic Disorders
Katherine A Gallagher, Andrea T Obi, Megan A Elfline, Emily Hogikyan, Catherine E Luke, Samuel Henke, Dawn Coleman, Peter K Henke
OBJECTIVE: Macrophages are involved in venous thrombus (VT) resolution and vein wall remodeling. This study was undertaken to identify variations in macrophage phenotypes in thrombi and vein wall in multiple models of VT to clarify the natural history of macrophage polarization in clearance of VT. We also sought to demonstrate the feasibility of macrophage phenotyping in human VT. METHODS: Established murine models of VT were used to mimic the clinical spectrum of human VT (stasis and nonstasis models)...
October 2016: Journal of Vascular Surgery. Venous and Lymphatic Disorders
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