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https://www.readbyqxmd.com/read/29053912/community-based-screening-of-hepatitis-c-with-a-one-step-rna-detection-algorithm-from-dried-blood-spots-analysis-of-key-populations-in-barcelona-spain
#1
V Saludes, C Folch, A Morales-Carmona, L Ferrer, L Fernández, R Muñoz, M Jiménez, E Loureiro, P Fernández-Dávila, E Bascuñana, J Casabona, E Martró
Alternative strategies are required to enhance the diagnosis of silent hepatitis C virus (HCV) infections in hard-to-reach key populations at risk. Among them, HCV prevalence and bio-behavioural data is scarce for HIV-negative men who have sex with men (MSM) and men and trans-women sex workers. We sought to describe and assess the potential benefits of a community-based one-step HCV screening and confirmatory strategy for these populations in Barcelona. The screening strategy based on a real-time RT-PCR assay for HCV-RNA detection in dried-blood spots (DBS) was validated and implemented in addition to an antibody point-of-care test in a community centre...
October 20, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29053737/screening-for-hiv-hepatitis-b-and-syphilis-on-dried-blood-spots-a-promising-method-to-better-reach-hidden-high-risk-populations-with-self-collected-sampling
#2
Inge H M van Loo, Nicole H T M Dukers-Muijrers, Rosalie Heuts, Marianne A B van der Sande, Christian J P A Hoebe
INTRODUCTION: Many people at high risk for sexually transmitted infections (STIs), e.g., men who have sex with men (MSM), are not optimally reached by current sexual health care systems with testing. To facilitate testing by home-based sampling or sampling in outreach setting we evaluated dried blood spots (DBS), a method for self-collected blood sampling for serological screening of HIV, hepatitis B (HBV) and syphilis. The aims of this study were to assess the acceptability and feasibility of self-collected DBS and to compare the test results for screening of HIV, HBV and syphilis from DBS with blood drawn by venous puncture...
2017: PloS One
https://www.readbyqxmd.com/read/29051091/theta-phase-closed-loop-stimulation-induces-motor-paradoxical-responses-in-the-rat-model-of-parkinson-disease
#3
Ivan Cordon, María Jesús Nicolás, Sandra Arrieta, Manuel Alegre, Julio Artieda, Miguel Valencia
BACKGROUND: High-frequency deep brain stimulation (DBS) has become a widespread therapy used in the treatment of Parkinson's Disease (PD) and other diseases. Although it has proved beneficial, much recent attention has been centered around the potential of new closed-loop DBS implementations. OBJECTIVE: Here we present a new closed-loop DBS scheme based on the phase of the theta activity recorded from the motor cortex. By testing the implementation on freely moving 6-OHDA lesioned and control rats, we assessed the behavioral and neurophysiologic effects of this implementation and compared it against the classical high-frequency DBS...
October 13, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29048556/deep-brain-stimulation-related-infections-analysis-of-rates-timing-and-seasonality
#4
Fran A Hardaway, Ahmed M Raslan, Kim J Burchiel
BACKGROUND: Infection is one of the most common complications of deep brain stimulation (DBS). Long-term infection rates beyond the immediate postoperative period are rarely evaluated. OBJECTIVE: To study short- and long-term DBS-related infection rates; to evaluate any potential seasonality associated with DBS-related infections. METHODS: We retrospectively reviewed all DBS surgeries performed in a 5-yr period at 1 hospital by a single surgeon...
October 18, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29048459/an-efficient-large-scale-survey-of-hepatitis-c-viremia-in-the-democratic-republic-of-the-congo-using-dried-blood-spots
#5
Jonathan B Parr, Evans K Lodge, Vera Holzmayer, Jacques Pepin, Eric H Frost, Michael W Fried, David R McGivern, Stanley M Lemon, Corinna Keeler, Michael Emch, Kashamuka Mwandagalirwa, Antoinette Tshefu, Franck Fwamba, Jérémie Muwonga, Steven R Meshnick, Gavin Cloherty
Background: Efficient viral load testing is needed for hepatitis C (HCV) surveillance and diagnosis. HCV viral load testing using dried blood spots (DBSs), made with a single drop of finger-prick whole blood on filter paper, is a promising alternative to traditional serum- or plasma-based approaches. Methods: We adapted the Abbott Molecular m2000 instrument for high-throughput HCV viremia testing using DBSs with simple specimen processing and applied these methods to estimate the national burden of infection in the Democratic Republic of the Congo (DRC)...
October 18, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29045074/detection-of-autologous-blood-transfusions-using-a-novel-dried-blood-spot-method
#6
Holly D Cox, Geoffrey D Miller, Auriella Lai, Dan Cushman, Daniel Eichner
In doping control laboratories, autologous blood transfusions are currently detected using an indirect method that monitors changes in an athlete's hemoglobin concentration [Hb] and reticulocyte percent (Ret%) over time. The method is limited by the need for a phlebotomist to collect venous blood and the limited blood stability which requires temperature-controlled shipment and analysis within 72 hours. These limitations significantly reduce the number of samples collected from each athlete and thus the utility of the method...
October 16, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29040867/long-term-follow-up-of-anterior-thalamic-deep-brain-stimulation-in-epilepsy-a-11-year-single-center-experience
#7
Seong Hoon Kim, Sung Chul Lim, Jiyeon Kim, Byung-Chul Son, Kyung Jin Lee, Young-Min Shon
PURPOSE: Anterior thalamic deep brain stimulation (ATN DBS) is an emerging, effective treatment for patients with drug-resistant epilepsy, but long-term results on its efficacy and safety are lacking. To evaluate the long-term efficacy and safety of ATN DBS treatment, as well as predictors of its success, in patients with drug-refractory epilepsy (DRE). METHOD: We retrospectively studied clinical outcomes in 29 consecutive refractory epilepsy patients treated by a single DBS team (two neurosurgeons, four neurologists) over an 11-year period, for whom follow-up was performed for up to 137 months (mean, 74...
October 14, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29040229/development-of-a-liquid-chromatography-tandem-mass-spectrometric-method-for-quantification-of-mycophenolic-acid-and-its-glucuronides-in-dried-blood-spot-samples
#8
Hiromasa Iboshi, Hiroaki Yamaguchi, Hiroyuki Suzuki, Masafumi Kikuchi, Masaki Tanaka, Shinya Takasaki, Akiko Takahashi, Masamitsu Maekawa, Miki Shimada, Yasushi Matsuda, Yoshinori Okada, Nariyasu Mano
BACKGROUND: Personalized immunosuppressive therapy, including accurate drug dosing based on drug blood level, leads to better clinical outcomes, specifically with regard to avoidance of drug-induced adverse effects and maintenance of efficacy. Mycophenolic acid (MPA) is used as an immunosuppressant in transplantation of various solid organs. The aim of this study was to develop a method for quantification of MPA and its metabolites, mycophenolic acid 7-O-glucuronide (MPAG) and mycophenolic acid acyl glucuronide, in dried blood spot (DBS) samples, using liquid chromatography/electrospray ionization/tandem mass spectrometry...
October 14, 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/29038282/intracellular-tenofovir-diphosphate-and-emtricitabine-triphosphate-in-dried-blood-spots-following-directly-observed-therapy-the-dot-dbs-study
#9
Peter L Anderson, Albert Y Liu, Jose R Castillo-Mancilla, Edward M Gardner, Sharon M Seifert, Cricket McHugh, Theresa Wagner, Kayla Campbell, Mary Morrow, Mustafa Ibrahim, Susan Buchbinder, Lane R Bushman, Jennifer J Kiser, Samantha MaWhinney
Studies of daily emtricitabine-tenofovir disoproxil fumarate (FTC-TDF) for HIV pre-exposure prophylaxis (PrEP) in men who have sex with men (MSM) modeled intracellular tenofovir-diphosphate (TFV-DP) in dried blood spots (DBS) to assess adherence and corresponding PrEP outcomes. We conducted a prospective, randomized, cross-over pharmacokinetic study of TFV-DP in DBS during 33%, 67% or 100% of daily dosing, under directly observed therapy (DOT). Participants were assigned to two 12-week dosing regimens, separated by a 12-week washout...
October 16, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29035801/systematic-review-with-meta-analysis-performance-of-dried-blood-spots-for-hepatitis-c%C3%A2-antibodies-detection
#10
REVIEW
B A Muzembo, N C Mbendi, S F Nakayama
OBJECTIVES: Dried blood spots (DBS) specimens can be used for hepatitis C virus (HCV) infection screening in cases where serum specimens are difficult to obtain. However, uncertainties surround the sensitivity and specificity of DBS for HCV antibodies (anti-HCV) serology testing. We aimed to evaluate the accuracy of DBS use to screen for HCV infection. STUDY DESIGN: We carried out a systematic review and meta-analysis. METHODS: Medline and EMBASE databases were searched for articles published between 1989 and November 2016...
October 13, 2017: Public Health
https://www.readbyqxmd.com/read/29034586/avoiding-internal-capsule-stimulation-with-a-new-eight-channel-steering-deep-brain-stimulation-lead
#11
Kees J van Dijk, Rens Verhagen, Lo J Bour, Ciska Heida, Peter H Veltink
OBJECTIVE: Novel deep brain stimulation (DBS) lead designs are currently entering the market, which are hypothesized to provide a way to steer the stimulation field away from neural populations responsible for side effects and towards populations responsible for beneficial effects. The objective of this study is to assess the performances of a new eight channel steering-DBS lead and compare this with a conventional cylindrical contact (CC) lead. APPROACH: The two leads were evaluated in a finite element electric field model combined with multicompartment neuron and axon models, representing the internal capsule (IC) fibers and subthalamic nucleus (STN) cells...
October 15, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29034573/memory-encoding-related-anterior-hippocampal-potentials-are-modulated-by-deep-brain-stimulation-of-the-entorhinal-area
#12
Niels Hansen, Leila Chaieb, Marlene Derner, Kevin G Hampel, Christian E Elger, Rainer Surges, Bernhard Staresina, Nikolai Axmacher, Juergen Fell
BACKGROUND: Deep brain stimulation (DBS) of the human entorhinal area using 50 Hz pulses has revealed conflicting results regarding memory performance. Moreover, its impact on memory-related hippocampal potentials has not yet been investigated. METHODS: We recorded data from seven epilepsy patients implanted with depth electrodes in the entorhinal cortex, hippocampus, amygdala and parahippocampal cortex. Entorhinal DBS (bipolar, biphasic 50 Hz pulses, on- and off-cycles of 15 s) was applied with low amplitude (0...
October 16, 2017: Hippocampus
https://www.readbyqxmd.com/read/29034243/improving-surgical-outcome-using-diffusion-tensor-imaging-techniques-in-deep-brain-stimulation
#13
REVIEW
Angela An Qi See, Nicolas Kon Kam King
INTRODUCTION: Recent advances in surgical imaging include the use of diffusion tensor imaging (DTI) in deep brain stimulation (DBS) and provide a detailed view of the white matter tracts and their connections which are not seen with conventional magnetic resonance imaging. Given that the efficacy of DBS depends on the precise and accurate targeting of these circuits, better surgical planning using information obtained from DTI may lead to improved surgical outcome. We aim to review the available literature to evaluate the efficacy of such a strategy...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/29033800/stimulation-of-cortico-subthalamic-projections-amplifies-resting-motor-circuit-activity-and-leads-to-increased-locomotion-in-dopamine-depleted-mice
#14
Teresa H Sanders
Deep brain stimulation (DBS) of the subthalamic nucleus (STN) improves motor function in patients with Parkinson's disease (PD). STN-DBS enables similar improved motor function, including increased movement speed (reduced bradykinesia), in the 6-OHDA dopamine-depletion mouse model of PD. Previous analyses of electrophysiological recordings from STN and motor cortex (M1) have explored signaling changes that correspond to PD and amelioration of PD symptoms. The most common results show an increase in beta frequency power during 'off' states and a reduction in beta during 'on' states...
2017: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/29032347/vocalic-transitions-as-markers-of-speech-acoustic-changes-with-stn-dbs-in-parkinson-s-disease
#15
Vincent Martel-Sauvageau, Kris Tjaden
PURPOSE: Deep Brain Stimulation of the subthalamic nucleus (STN-DBS) effectively treats cardinal symptoms of idiopathic Parkinson's disease (PD) that cannot be satisfactorily managed with medication. Research is equivocal regarding speech changes associated with STN-DBS. This study investigated the impact of STN-DBS on vocalic transitions and the relationship to intelligibility. METHODS: Eight Quebec-French speakers with PD and eight healthy controls participated...
October 7, 2017: Journal of Communication Disorders
https://www.readbyqxmd.com/read/29032294/one-year-double-blind-study-of-high-vs-low-frequency-subcallosal-cingulate-stimulation-for-depression
#16
Renana Eitan, Denys Fontaine, Michel Benoît, Caroline Giordana, Nelly Darmon, Zvi Israel, Eduard Linesky, David Arkadir, Shiri Ben-Naim, Moshe Iserlles, Hagai Bergman, Natasha Hulse, Mohamed Abdelghani, Peter McGuffin, Anne Farmer, Peichel DeLea, Keyoumars Ashkan, Bernard Lerer
Subcallosal Brodmann's Area 25 (Cg25) Deep Brain Stimulation (DBS) is a new promising therapy for treatment resistant major depressive disorder (TR-MDD). While different DBS stimulating parameters may have an impact on the efficacy and safety of the therapy, there is no data to support a protocol for optimal stimulation parameters for depression. Here we present a prospective multi-center double-blind randomized crossed-over 13-month study that evaluated the effects of High (130 Hz) vs Low (20 Hz) frequency Cg25 stimulation for nine patients with TR-MDD...
October 3, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/29031639/oscillatory-neural-representations-in-the-sensory-thalamus-predict-neuropathic-pain-relief-by-deep-brain-stimulation
#17
Yongzhi Huang, Alexander L Green, Jonathan Hyam, James Fitzgerald, Tipu Z Aziz, Shouyan Wang
OBJECTIVE: Understanding the function of sensory thalamic neural activity is essential for developing and improving interventions for neuropathic pain. However, there is a lack of investigation of the relationship between sensory thalamic oscillations and pain relief in patients with neuropathic pain. This study aims to identify the oscillatory neural characteristics correlated with pain relief induced by deep brain stimulation (DBS), and develop a quantitative model to predict pain relief by integrating characteristic measures of the neural oscillations...
October 12, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/29031219/long-term-correlation-of-subthalamic-beta-band-activity-with-motor-impairment-in-patients-with-parkinson-s-disease
#18
Wolf-Julian Neumann, Franziska Staub-Bartelt, Andreas Horn, Julia Schanda, Gerd-Helge Schneider, Peter Brown, Andrea A Kühn
OBJECTIVES: To investigate the long term association of subthalamic beta activity with parkinsonian motor signs. METHODS: We recruited 15 patients with Parkinson's disease undergoing subthalamic DBS for local field potential recordings after electrode implantation, and at 3 and 8months post-operatively using the implantable sensing enabled Activa PC+S (Medtronic). Three patients dropped out leaving 12 patients. Recordings were conducted ON and OFF levodopa at rest...
September 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29029130/alternative-sample-types-for-hiv-1-antiretroviral-drug-resistance-testing
#19
Dolly Singh, Adit Dhummakupt, Lilly Siems, Deborah Persaud
Monitoring human immunodeficiency virus type 1 (HIV-1) drug resistance is critical for assessing ART effectiveness and treatment outcomes for HIV-1-infected individuals, including children, worldwide. Traditionally, testing for HIV-1 drug resistance has primarily been performed on plasma samples, and with commercially available, clinically validated assays that are costly and difficult to access. While plasma is the preferred sample for HIV-1 drug resistance genotyping, plasma analysis requires sophisticated laboratory equipment, personnel, space, and stringent storage conditions for maintenance of sample integrity and transport...
October 6, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29028865/clinical-ethics-in-the-context-of-deep-brain-stimulation-for-movement-disorders
#20
Cynthia S Kubu, Paul J Ford
Objective: Discuss common clinical ethical challenges encountered in working with patients who are candidates for deep brain stimulation (DBS) for the treatment of motor symptoms of Parkinson's disease (PD). Method: The relevant literature is reviewed and supplemented by descriptive, ethically challenging cases stemming from decades of combined experience working on DBS teams. We outline ethical arguments and provide pragmatic recommendations to assist neuropsychologists working in movement disorder teams...
September 25, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
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