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Laboratory Medicine

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https://www.readbyqxmd.com/read/28105335/detection-of-stanozolol-in-the-urine-of-athletes-at-a-pg-level-the-possibility-of-passive-exposure
#1
Christina Tsitsimpikou, Konstantinos Tsarouhas, Demetrios A Spandidos, Aristides M Tsatsakis
Stanozolol is a synthetic heterocyclic steroid with anabolic and androgenic properties, which has been abused by several high-profile professional athletes. Stanozolol is also used in veterinary medicine to increase appetite, cause weight gain and treat certain types of anemia. The detection of stanozolol metabolites in human urine for doping control purposes depends on the analytical method applied. The most commonly applied methods in the World Anti-Doping Agency (WADA)-accredited doping control laboratories are gas chromatography/high-resolution mass spectrometry (GC/HRMS) or gas chromatography-mass spectrometry (GC/MS/MS)...
December 2016: Biomedical Reports
https://www.readbyqxmd.com/read/28104974/rare-manifestation-of-digoxin-toxicity-right-bundle-branch-block
#2
Dalvir Gill, Samana Zaidi
A 76-year-old female, with medical history significant for systolic congestive heart failure, who presented to the emergency department with lethargy and abdominal pain with diarrhea for the past 3 weeks. Due to hypotension, the patient received multiple boluses of isotonic saline and was started on norepinephrine. Laboratories were significant for severe digoxin toxicity (29 ng/mL), in setting of acute kidney injury. Electrocardiogram (EKG) revealed a new right bundle branch block (RBBB). She was given Digibind and her repeat digoxin level was 20 ng/mL...
December 2016: Journal of Basic and Clinical Pharmacy
https://www.readbyqxmd.com/read/28104806/reducing-unnecessary-testing-an-intervention-to-improve-resident-ordering-practices
#3
Jose Melendez-Rosado, Kristine M Thompson, Jed C Cowdell, Catalina Sanchez Alvarez, Ryan L Ung, Armando Villanueva, Kayin B Jeffers, Jaafer S Imam, Mario V Mitkov, Tasneem A Kaleem, Lewis Jacob, Nancy L Dawson
PURPOSE OF THE STUDY: To reduce the number of unnecessary laboratory tests ordered through a measurement of effects of education and cost awareness on laboratory ordering behaviour by internal medicine residents for common tests, including complete blood cell count (CBC) and renal profile (RP), and to evaluate effects of cost awareness on hospitalisation, 30-day readmission rate and mortality rate. STUDY DESIGN: 567 patients admitted during February, March and April 2014 were reviewed as the control group...
January 19, 2017: Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28102863/a-taxonomy-of-medical-uncertainties-in-clinical-genome-sequencing
#4
Paul K J Han, Kendall L Umstead, Barbara A Bernhardt, Robert C Green, Steven Joffe, Barbara Koenig, Ian Krantz, Leo B Waterston, Leslie G Biesecker, Barbara B Biesecker
PURPOSE: Clinical next-generation sequencing (CNGS) is introducing new opportunities and challenges into the practice of medicine. Simultaneously, these technologies are generating uncertainties of an unprecedented scale that laboratories, clinicians, and patients are required to address and manage. We describe in this report the conceptual design of a new taxonomy of uncertainties around the use of CNGS in health care. METHODS: Interviews to delineate the dimensions of uncertainty in CNGS were conducted with genomics experts and themes were extracted in order to expand on a previously published three-dimensional taxonomy of medical uncertainty...
January 19, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28101802/cold-pcr-technologies-in-the-area-of-personalized-medicine-methodology-and-applications
#5
REVIEW
Florence Mauger, Alexandre How-Kit, Jörg Tost
Somatic mutations bear great promise for use as biomarkers for personalized medicine, but are often present only in low abundance in biological material and are therefore difficult to detect. Many assays for mutation analysis in cancer-related genes (hotspots) have been developed to improve diagnosis, prognosis, prediction of drug resistance, and monitoring of the response to treatment. Two major approaches have been developed: mutation-specific amplification methods and methods that enrich and detect mutations without prior knowledge on the exact location and identity of the mutation...
January 18, 2017: Molecular Diagnosis & Therapy
https://www.readbyqxmd.com/read/28100990/drug-induced-liver-injury-associated-with-complementary-and-alternative-medicines
#6
Koji Takahashi, Tatsuo Kanda, Shin Yasui, Yuki Haga, Junichiro Kumagai, Reina Sasaki, Shuang Wu, Shingo Nakamoto, Masato Nakamura, Makoto Arai, Osamu Yokosuka
A 24-year-old man was admitted due to acute hepatitis with unknown etiology. After his condition and laboratory data gradually improved with conservative therapy, he was discharged 1 month later. Two months after his discharge, however, liver dysfunction reappeared. After his mother accidentally revealed that he took complementary and alternative medicine, discontinuation of the therapy caused his condition to improve. Finally, he was diagnosed with a recurrent drug-induced liver injury associated with Japanese complementary and alternative medicine...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/28099036/another-generation-of-stigma-assessing-healthcare-student-perceptions-of-hiv-positive-patients-in-mwanza-tanzania
#7
Sahil Aggarwal, Debora H Lee, William B Minteer, Reece T H Fenning, Shella K Raja, Megan E Bernstein, Kaavya R Raman, Sean P Denny, Priya A Patel, Mark Lieber, Allison O Farfel, Catherine A Diamond
HIV-related stigma remains a persistent global health concern among people living with HIV/AIDS (PLWA) in developing nations. The literature is lacking in studies about healthcare students' perceptions of PLWA. This study is the first effort to understand stigmatizing attitudes toward HIV-positive patients by healthcare students in Mwanza, Tanzania, not just those who will be directly treating patients but also those who will be indirectly involved through nonclinical roles, such as handling patient specimens and private health information...
January 18, 2017: AIDS Patient Care and STDs
https://www.readbyqxmd.com/read/28097901/skin-whitening-agents-medicinal-chemistry-perspective-of-tyrosinase-inhibitors
#8
Thanigaimalai Pillaiyar, Manoj Manickam, Vigneshwaran Namasivayam
Melanogenesis is a process to synthesize melanin, which is a primary responsible for the pigmentation of human skin, eye and hair. Although numerous enzymatic catalyzed and chemical reactions are involved in melanogenesis process, the enzymes such as tyrosinase and tyrosinase-related protein-1 (TRP-1) and TRP-2 played a major role in melanin synthesis. Specifically, tyrosinase is a key enzyme, which catalyzes a rate-limiting step of the melanin synthesis, and the downregulation of tyrosinase is the most prominent approach for the development of melanogenesis inhibitors...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28096961/polysaccharide-from-sepia-esculenta-ink-and-cisplatin-inhibit-synergistically-proliferation-and-metastasis-of-triple-negative-breast-cancer-mda-mb-231-cells
#9
Hua-Zhong Liu, Wei Xiao, Yi-Peng Gu, Ye-Xing Tao, Da-Yan Zhang, Hui Du, Jiang-Hua Shang
OBJECTIVES: This paper aims to investigate synergistic inhibition of polysaccharide from Sepia esculenta ink (SIP), a newly isolated marine polysaccharide in our laboratory, on breast cancer MDA-MB-231 cells exposed to cisplatin. MATERIALS AND METHODS: Cell viability of MDA-MB-231 cells was determined by CCK 8 assay. Median-effect concentration was analyzed using Chou-Talalay method that was also subjected to determine cell inhibition ratio and combined index, as well as interaction between SIP and cisplatin...
December 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28094784/targeted-dna-sequencing-and-in-situ-mutation-analysis-using-mobile-phone-microscopy
#10
Malte Kühnemund, Qingshan Wei, Evangelia Darai, Yingjie Wang, Iván Hernández-Neuta, Zhao Yang, Derek Tseng, Annika Ahlford, Lucy Mathot, Tobias Sjöblom, Aydogan Ozcan, Mats Nilsson
Molecular diagnostics is typically outsourced to well-equipped centralized laboratories, often far from the patient. We developed molecular assays and portable optical imaging designs that permit on-site diagnostics with a cost-effective mobile-phone-based multimodal microscope. We demonstrate that targeted next-generation DNA sequencing reactions and in situ point mutation detection assays in preserved tumour samples can be imaged and analysed using mobile phone microscopy, achieving a new milestone for tele-medicine technologies...
January 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28079593/improving-the-clinic-laboratory-interface-in-the-context-of-hiv-diagnosis-treatment-and-monitoring
#11
Timothy Johan Tucker, Peter Tsakani Manyike
PURPOSE OF REVIEW: Laboratory support is central to clinical medicine. The present review focuses on the health systems strengthening needs of the clinic-laboratory-interface (CLI) in developing countries within the context of HIV diagnosis, treatment, and monitoring. RECENT FINDINGS: Although significant improvements have been made in reducing error rates in the analytical phase of pathology services within laboratories, there remain substantial deficits in both the preanalytic and postanalytic phases of the entire value chain that require strengthening...
January 11, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28078374/-anaesthesia-procedures-and-invasive-vascular-access-in-severely-injured-patients-at-trauma-room-admission-in-germany-an-online-survey
#12
M F Struck, P Hilbert-Carius, B Hossfeld, J Hinkelbein, M Bernhard, T Wurmb
BACKGROUND: The continuous monitoring of vital parameters and subsequent therapy belong to the core duties of anaesthetists during acute trauma resuscitation in the trauma room. Important procedures may include placement of arterial lines and central venous catheters (CVCs). Knowledge of indication, performance and localization of invasive catheterisation of trauma care in Germany is scarce. METHODS: After approval of the German Society of Anaesthesiology and Intensive Care Medicine we conducted an online survey about arterial and central venous catheterisation of severely injured patients with consideration of common practice used by anaesthetists in German trauma rooms...
January 11, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28075419/surveillance-of-clostridium-difficile-infections-results-from-a-six-year-retrospective-study-in-nine-hospitals-of-a-north-italian-local-health-authority
#13
Greta Roncarati, Laura Dallolio, Erica Leoni, Manuela Panico, Angela Zanni, Patrizia Farruggia
Clostridium difficile is an emerging cause of healthcare associated infections. In nine hospitals of an Italian Local Health Authority the episodes of C. difficile infection (CDI) were identified using the data registered by the centralized Laboratory Information System, from 2010 to 2015. CDI incidence (positive patients for A and/or B toxins per patients-days) was analysed per year, hospital, and ward. A number of cases approximately equivalent to the mean of identified cases per year were studied retrospectively to highlight the risk factors associated to CDI and their severity...
January 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28074041/transcription-factor-xpp1-is-a-switch-between-primary-and-secondary-fungal-metabolism
#14
Christian Derntl, Bernhard Kluger, Christoph Bueschl, Rainer Schuhmacher, Robert L Mach, Astrid R Mach-Aigner
Fungi can produce a wide range of chemical compounds via secondary metabolism. These compounds are of major interest because of their (potential) application in medicine and biotechnology and as a potential source for new therapeutic agents and drug leads. However, under laboratory conditions, most secondary metabolism genes remain silent. This circumstance is an obstacle for the production of known metabolites and the discovery of new secondary metabolites. In this study, we describe the dual role of the transcription factor Xylanase promoter binding protein 1 (Xpp1) in the regulation of both primary and secondary metabolism of Trichoderma reesei Xpp1 was previously described as a repressor of xylanases...
January 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28072712/seniorlab-a-prospective-observational-study-investigating-laboratory-parameters-and-their-reference-intervals-in-the-elderly
#15
Martin Risch, Urs Nydegger, Lorenz Risch
BACKGROUND: In clinical practice, laboratory results are often important for making diagnostic, therapeutic, and prognostic decisions. Interpreting individual results relies on accurate reference intervals and decision limits. Despite the considerable amount of resources in clinical medicine spent on elderly patients, accurate reference intervals for the elderly are rarely available. The SENIORLAB study set out to determine reference intervals in the elderly by investigating a large variety of laboratory parameters in clinical chemistry, hematology, and immunology...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28071936/concussion-baseline-testing-preexisting-factors-symptoms-and-neurocognitive-performance
#16
Eric Hall, Jordan Cottle, Caroline Ketcham, Kirtida Patel, Kenneth P Barnes
CONTEXT:  Neurocognitive test scores are often considered an important aspect of concussion management. To best use these data, clinicians must understand potential factors that may influence baseline performance on these tests. OBJECTIVE:  To determine preexisting factors that may influence performance on the Immediate Post-Concussion Assessment and Cognitive Test (ImPACT). DESIGN:  Cross-sectional study. SETTING:  Research laboratory...
January 10, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28065955/analysis-of-pattern-of-mortality-in-medicine-and-allied-departments-at-a-tertiary-care-hospital-in-islamabad-a-losing-battle-against-sepsis
#17
Saad Azim, Sidra Zahoor, Jamal Janjua, Azer Majeed, Syed Waqar Hussain
OBJECTIVE: To identify the pattern of mortality in medical wards of a tertiary care hospital. METHODS: This retrospective study was conducted at the Khan Research Laboratories Hospital, Islamabad, Pakistan, and comprised medical records of people who died during hospital stay between December 2013 and November 2014.SPSS 11 was used for data analysis. RESULTS: Of the 3,228 admissions, 105(3.25%) patients expired. Of them, 41(39.04%) were men with a mean age of 55±13...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28064562/new-interpretive-criteria-for-danofloxacin-antibacterial-susceptibility-testing-against-mannheimia-haemolytica-and-pasteurella-multocida-associated-with-bovine-respiratory-disease
#18
Michael T Sweeney, Mark G Papich, Jeffrey L Watts
Danofloxacin is a fluoroquinolone antibacterial agent approved for use in veterinary medicine to treat and control bovine respiratory disease caused by Mannheimia haemolytica or Pasteurella multocida. Susceptible minimal inhibitory concentration (MIC) breakpoint (≤0.25 µg/mL) and disk diffusion interpretive criteria (≥22 mm) values for danofloxacin against M. haemolytica and P. multocida were first approved by the Clinical and Laboratory Standards Institute (CLSI) in 2003. However, intermediate and resistant breakpoint values were not established because only susceptible wild-type populations were evident at the time of breakpoint approvals...
January 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28064353/who-is-a-healthy-subject-consensus-results-on-pivotal-eligibility-criteria-for-clinical-trials
#19
REVIEW
Kerstin Breithaupt-Groegler, Christoph Coch, Martin Coenen, Frank Donath, Katharina Erb-Zohar, Klaus Francke, Karin Goehler, Mario Iovino, Klaus Peter Kammerer, Gerd Mikus, Jens Rengelshausen, Hildegard Sourgens, Reinhard Schinzel, Thomas Sudhop, Georg Wensing
INTRODUCTION/METHODS: A discussion forum was hosted by the German not-for-profit Association for Applied Human Pharmacology (AGAH e.V.) to critically review key eligibility criteria and stopping rules for clinical trials with healthy subjects, enrolling stakeholders from the pharmaceutical industry, contract research organisations, academia, ethics committees and competent authority. RESULTS: Pivotal eligibility criteria were defined for trials with new investigational medicinal products (IMPs) or with clinically established IMPs...
January 7, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28063635/determination-of-cocaine-and-its-derivatives-in-hair-samples-by-liquid-phase-microextraction-lpme-and-gas-chromatography-mass-spectrometry-gc-ms
#20
A M F Pego, F L Roveri, R Y Kuninari, V Leyton, I D Miziara, M Yonamine
Hair testing is a recognized approach when it comes to accessing historical drug use. According to the World Drug Report of United Nations Office on Drugs and Crime (UNODC) 2015, Brazil is the largest cocaine (COC) market in South America. New analytical methodologies to detect crack/cocaine analytes in hair samples are highly desirable. Here, a method consisting of a liquid-phase microextraction (LPME) as a clean-up step, followed by gas chromatography-mass spectrometry (GC-MS) analysis has been proposed. The new validated method consisted of a washing step; an overnight incubation with methanol and a quick derivatization with butylchloroformate...
December 23, 2016: Forensic Science International
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