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Li Xie, Liqin Chen, Pan Gu, Lanlan Wei, Xuejun Kang
The extraction and analysis of catecholamine neurotransmitters in biological fluids is of great importance in assessing nervous system function and related diseases, but their precise measurement is still a challenge. Many protocols have been described for neurotransmitter measurement by a variety of instruments, including high-pressure liquid chromatography (HPLC). However, there are shortcomings, such as complicated operation or hard-to-detect multiple targets, which cannot be avoided, and presently, the dominant analysis technique is still HPLC coupled with sensitive electrochemical or fluorimetric detection, due to its high sensitivity and good selectivity...
March 1, 2018: Journal of Visualized Experiments: JoVE
Miki Dalmau-Pastor, Jordi Vega, Francesc Malagelada, Fernando Peña, Maria Cristina Manzanares-Céspedes
The growing popularity of minimally invasive surgical (MIS) procedures makes it necessary that new anatomical references arise, to aid in tridimensional orientation and localization of structures that are not directly visible to the surgeon. This is especially critical for structures at risk like nerves or blood vessels. Optimization of the handling of cadaveric material and the combination of multiple techniques compensate for the limited availability of adequate specimens. The described protocol combines anatomical plane-by-plane dissection and sectional anatomy of fresh-frozen specimens to help localize relevant structures, such as nerves, arteries, veins and to correctly position the portals during MIS procedures...
February 17, 2018: Journal of Visualized Experiments: JoVE
Michael D Guthrie, Donald L Gilbert, David A Huddleston, Ernest V Pedapati, Paul S Horn, Stewart H Mostofsky, Steve W Wu
We describe the development of a reproducible, child-friendly motor response inhibition task suitable for online Transcranial Magnetic Stimulation (TMS) characterization of primary motor cortex (M1) excitability and inhibition. Motor response inhibition prevents unwanted actions and is abnormal in several neuropsychiatric conditions. TMS is a non-invasive technology that can quantify M1 excitability and inhibition using single- and paired-pulse protocols and can be precisely timed to study cortical physiology with high temporal resolution...
February 8, 2018: Journal of Visualized Experiments: JoVE
Salma H Azam, Mitchell Smith, Vivek Somasundaram, Chad V Pecot
Angiogenesis is the growth of new vessels from pre-existing vasculature and is an important component of many biological processes, including embryogenesis and development, wound healing, tumor growth and metastasis, and ocular and cardiovascular diseases. Effective in vitro models that recapitulate the biology of angiogenesis are needed to appropriately study this process and identify mechanisms of regulation that can be ultimately targeted for novel therapeutic strategies. The bead angiogenesis assay has been previously demonstrated to recapitulate the multiple stages of endothelial sprouting in vitro...
February 16, 2018: Journal of Visualized Experiments: JoVE
Xinyi Ding, Yuxiang Sun, Yanming Chen, Wanchuan Ding, Steven Emory, Tianhao Li, Zixing Xu, Ning Han, Jun Wang, Gang Ruan
Micellar nanocrystals (micelles with encapsulated nanocrystals) have become an emerging major class of nanobiomaterials. We describe a method of fabricating micellar nanocrystals based on combining top-down electrospray, bottom-up self-assembly, and solvent-based structure control. This method involves first using electrospray to generate uniform ultrafine liquid droplets, each of which functions as a micro-reactor in which self-assembly reaction occurs forming micellar nanocrystals, with the structures (micelle shape and nanocrystal encapsulation) controlled by the organic solvent used...
February 11, 2018: Journal of Visualized Experiments: JoVE
Andrey Zavadsky, Lev Shemer
This manuscript describes an experimental procedure that allows obtaining diverse quantitative information on temporal and spatial evolution of water waves excited by time-dependent and steady wind forcing. Capacitance-type wave gauge and Laser Slope Gauge (LSG) are used to measure instantaneous water surface elevation and two components of the instantaneous surface slope at a number of locations along the test section of a wind-wave facility. The computer-controlled blower provides airflow over the water in the tank whose rate can vary in time...
February 13, 2018: Journal of Visualized Experiments: JoVE
Marija D Ivanovic, Jovana Petrovic, Andrej Savic, Goran Gligoric, Marjan Miletic, Miodrag Vukcevic, Bosko Bojovic, Ljupco Hadzievski, Tom D P Allsop, David J Webb
The ventilators involved in non-invasive mechanical ventilation commonly provide ventilator support via a facemask. The interface of the mask with a patient promotes air leaks that cause errors in the feedback information provided by a pneumatic sensor and hence patient-ventilator asynchrony with multiple negative consequences. Our objective is to test the possibility of using chest-wall motion measured by an optical fibre-grating sensor as a more accurate non-invasive ventilator triggering mechanism.
 Approach: The basic premise of our approach is that the measurement accuracy can be improved by using a triggering signal that precedes pneumatic triggering in the neuro-ventilatory coupling sequence...
March 19, 2018: Physiological Measurement
Hugo Legge, Amira Shaheen, Ghassan Shakhshir, Ai Milojevic
BACKGROUND: Water insecurity is an important risk factor for disease. In recent years, Palestinians have seen access to drinking water increasingly restricted. The aim of this study was to describe such changes over time and examine the association between drinking water sources and the health of children younger than 5 years in the occupied Palestinian territory in 2000-14. METHODS: For this repeated cross-sectional study we used data from five Demographic and Health Surveys conducted between 2000 and 2014...
February 21, 2018: Lancet
Samah W Al-Jabi, Ansam Sous, Fatimah Jorf, Mahmoud Taqatqa, Mahdi Allan, Lamees Sawalha, Enas Lubadeh, Sa'ed H Zyoud, Waleed M Sweileh
BACKGROUND: The increasing incidence of end-stage renal disease in the Palestinian population and the effect of the disease on the psychological status of the patient underlie the importance of increasing knowledge about the mental health status of patients with end-stage renal disease. The aim of this study was to estimate the prevalence of depression in Palestinian patients treated with haemodialysis and its correlation with patients' clinical characteristics, health-related quality of life (HRQoL), and adherence to medications...
February 21, 2018: Lancet
Aeysha Chaudhry, Shakoor Hajat, Najwa Rizkallah, Ala'a Abu-Rub
BACKGROUND: Vitamin A and vitamin D are essential for a child's growth and development. However, research on micronutrients in the occupied Palestinian territory is scarce. The aim of this study was to ascertain the prevalence and risk factors of vitamin A and vitamin D deficiencies in children living in the occupied Palestinian territory. METHODS: The Palestinian Micronutrient Survey in 2013 measured concentrations of vitamin A in 1054 children (569 children in the West Bank and 485 children in the Gaza Strip) and vitamin D in 150 children (75 children in the West Bank and 75 children in the Gaza Strip)...
February 21, 2018: Lancet
Majed Hababeh, Wafaa Zeidan, Mariam Abdel El-Kader, Anwar Al Thaher, Nimer Kassim, Elias Habash, Hasan Arab, Ali Khader, Akihiro Seita
BACKGROUND: UNRWA introduced family planning services in 1994 as an integral part of its expanded maternal and child health-care programme. The main objective of UNRWA's family planning programme is to promote the health of mothers, children, and their families. The aim of this follow-up study was to assess contraceptive practices in the target population 5 years after the 2010 follow-up study and to identify future programme needs. METHODS: This cross-sectional survey was a done by trained nurses from June 1 to Dec 31, 2015...
February 21, 2018: Lancet
Giulia Canali, Victoria Tittle, Akihiro Seita
BACKGROUND: The United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) estimated that in 2016, 11% of Palestine refugees older than 40 years living in Jordan were diagnosed with diabetes and that the disease is controlled in only 45% of Palestine refugees with diabetes. As medication adherence is one of the most important modifiable self-care behaviours to achieve adequate metabolic control, the aims of this study were to measure medication adherence and to review the factors associated with different levels of medication adherence in patients with diabetes...
February 21, 2018: Lancet
Jennifer F Buckman, Evgeny G Vaschillo, Maria Fonoberova, Igor Mezić, Marsha E Bates
OBJECTIVE: It has been nearly 15 years since Kazdin and Nock published methodological and research recommendations for understanding mechanisms of change in child and adolescent therapy. Their arguments and enthusiasm for research on mechanisms of behavior change (MOBCs) resonated across disciplines and disorders, as it shined a light on the crucial importance of understanding how and for whom treatments instigate behavior change and how therapeutic mechanisms might be extended to "situations and settings of everyday life...
March 2018: Journal of Studies on Alcohol and Drugs
Holly P O'Rourke, David P MacKinnon
OBJECTIVE: Mediation models are used in prevention and intervention research to assess the mechanisms by which interventions influence outcomes. However, researchers may not investigate mediators in the absence of intervention effects on the primary outcome variable. There is emerging evidence that in some situations, tests of mediated effects can be statistically significant when the total intervention effect is not statistically significant. In addition, there are important conceptual and practical reasons for investigating mediation when the intervention effect is nonsignificant...
March 2018: Journal of Studies on Alcohol and Drugs
Seiya Yamayoshi, Maki Kiso, Atsuhiro Yasuhara, Mutsumi Ito, Yuelong Shu, Yoshihiro Kawaoka
To clarify the threat posed by emergence of highly pathogenic influenza A(H7N9) virus infection among humans, we characterized the viral polymerase complex. Polymerase basic 2-482R, polymerase basic 2-588V, and polymerase acidic-497R individually or additively enhanced virus polymerase activity, indicating that multiple replication-enhancing mutations in 1 isolate may contribute to virulence.
April 2018: Emerging Infectious Diseases
Tambri Housen, Annick Lenglet, Cono Ariti, Shabnum Ara, Showkat Shah, Maqbool Dar, Arshad Hussain, Altaf Paul, Zahoor Wagay, Kerri Viney, Simon Janes, Giovanni Pintaldi
The present study aimed to culturally adapt, translate, and validate the Hopkins Symptom Checklist-25 (HSCL-25) and the Harvard Trauma Questionnaire-Posttraumatic Stress Symptoms Checklist (HTQ-16) prior to use in a cross-sectional mental health population survey in the Kashmir Valley. Cultural adaptation and translation of the HSCL-25 and the HTQ-16 employed multiple forms of transcultural validity check. The HSCL-25 and HTQ-16 were compared against a "gold standard" structured psychiatric interview, the Mini International Neuropsychiatric Interview (MINI)...
January 1, 2018: Transcultural Psychiatry
Hannah Crawford, Heather Wilkinson
Life grids have been used in qualitative studies for the last two decades. They provide an activity which researcher and participant can focus their attention on, help build rapport, and reduce the control the researcher may hold within a session. Here we describe the novel use of life grids at the end of a data collection phase. Used in this previously unreported way, life grids assisted the closure of the data collection phase by summarizing the data collection and marking departure from the field. Creation of a life grid produced a tangible outcome, evidencing the work undertaken within the data collection period...
March 1, 2018: Qualitative Health Research
Carlo Alberto Scirè, Cristina Rossi, Leonardo Punzi, Augusto Genderini, Claudio Borghi, Walter Grassi
Despite being regarded as an easily-treatable disease, gout diagnosis and management can be challenging. We discuss here current issues in gout management and propose some potential solutions. Gout diagnosis should be reached as early as possible and often requires specific tests, such as synovial fluid analysis or imaging techniques that are not available in most centers, leaving health care professionals to rely only on clinical presentations and their experience. In addition, gout management requires the evaluation of multiple aspects, such as monitoring of serum uric acid (sUA) level (which should be reduced to <6 mg/dL) to ensure adherence and efficacy of treatment, evaluation of patient's risk profile and comorbidities, and continuous assessments to manage clinical manifestations...
March 19, 2018: Current Medical Research and Opinion
Amir S Steinberg, Anish B Parikh, Sara Kim, Damaris Peralta-Hernandez, Talaat Aggour, Luis Isola
OBJECTIVES: Antibiotic stewardship is an integral aspect of hospital care, limiting the potential for resistance while working to minimize waste. A similar system is needed in oncology, given the rapid proliferation of new therapies and the challenges of navigating a complicated reimbursement environment. A "cancer therapy stewardship program" has never been described in the literature. Here, we detail our efforts to design and implement such a program and share lessons learned to inform future projects...
March 2018: American Journal of Managed Care
Peter D Koch, Howard R Miller, Gary Yu, John A Tallarico, Peter K Sorger, Yuan Wang, Yan Feng, Jason R Thomas, Nathan T Ross, Timothy Mitchison
We screened a library of bioactive small molecules for activators and inhibitors of innate immune signaling through IRF3 and NFkB pathways with the goals of advancing pathway understanding and discovering probes for immunology research. We used high content screening to measure the translocation from the cytoplasm to nucleus of IRF3 and NFkB in primary human macrophages; these transcription factors play a critical role in the activation of STING and other pro-inflammatory pathways. Our pathway activator screen yielded a diverse set of hits that promoted nuclear translocation of IRF3 and/or NFkB, but the majority of these compounds did not cause activation of downstream pathways...
March 19, 2018: ACS Chemical Biology
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