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https://www.readbyqxmd.com/read/28107980/lab-on-chip-for-liquid-biopsy-loc-lb-based-on-dielectrophoresis
#1
Bobby Mathew, Anas Alazzam, Saud Khashan, Mohammad Abutayeh
This short communication presents the proof-of-concept of a novel dielectrophoretic lab-on-chip for identifying/separating circulating tumor cells for purposes of liquid biopsy. The device consists of a polydimethylsiloxane layer, containing a microchannel, bonded on a glass substrate that holds two sets of planar interdigitated transducer electrodes. The lab-on-chip is operated at a frequency that enables dielectrophoretic force to sort cells, based on type, along the lateral direction. The operating frequency ensures attraction force toward the electrodes on cancer cells and repulsion force toward the center of the microchannel on other cells...
March 1, 2017: Talanta
https://www.readbyqxmd.com/read/28107395/prevalence-of-pre-analytical-errors-in-clinical-chemistry-diagnostic-labs-in-sulaimani-city-of-iraqi-kurdistan
#2
Dereen Najat
BACKGROUND: Laboratory testing is roughly divided into three phases: a pre-analytical phase, an analytical phase and a post-analytical phase. Most analytical errors have been attributed to the analytical phase. However, recent studies have shown that up to 70% of analytical errors reflect the pre-analytical phase. The pre-analytical phase comprises all processes from the time a laboratory request is made by a physician until the specimen is analyzed at the lab. Generally, the pre-analytical phase includes patient preparation, specimen transportation, specimen collection and storage...
2017: PloS One
https://www.readbyqxmd.com/read/28105585/how-feasible-is-multiple-time-point-web-based-data-collection-with-individuals-experiencing-street-homelessness
#3
Karin M Eyrich-Garg, Shadiya L Moss
Three barriers investigators often encounter when conducting longitudinal work with homeless or other marginalized populations are difficulty tracking participants, high rates of no-shows for follow-up interviews, and high rates of loss to follow-up. Recent research has shown that homeless populations have substantial access to information technologies, including mobile devices and computers. These technologies have the potential both to make longitudinal data collection with homeless populations easier and to minimize some of these methodological challenges...
January 19, 2017: Journal of Urban Health: Bulletin of the New York Academy of Medicine
https://www.readbyqxmd.com/read/28102419/towards-encoded-particles-for-highly-multiplexed-colorimetric-point-of-care-autoantibody-detection
#4
Gustav Svedberg, Yunjin Jeong, Hunjong Na, Jisung Jang, Peter Nilsson, Sunghoon Kwon, Jesper Gantelius, Helene Andersson Svahn
Highly multiplexed point of care tests could improve diagnostic accuracy and differential diagnostic capacity in for instance emergency medicine and low resource environments. Available technology platforms for POC biomarker detection are typically simplex or low-plexed, whereas common lab-based microarray systems allow for the simultaneous detection of thousands of DNA or protein biomarkers. In this study, we demonstrate a novel suspension particle array platform that utilizes 900 μm bricks for POC amenable colorimetric biomarker detection with an encoding capacity of over two million...
January 19, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28101843/postprandial-glp-2-levels-are-increased-after-biliopancreatic-diversion-in-diabetic-individuals-with-class-i-obesity-a-prospective-study
#5
Everton Cazzo, José Carlos Pareja, Bruno Geloneze, Elinton Adami Chaim, Maria Rita Lazzarini Barreto, Daniéla Oliveira Magro
BACKGROUND: Biliopancreatic diversion (BPD) is a predominantly malabsorptive procedure. Glucagon-like peptide 2 (GLP-2) plays predominantly trophic effects on the gut. A significant increase in GLP-2 after BPD in rats was previously observed, but there are no studies investigating the effect of BPD in GLP-2 levels in humans. OBJECTIVE: The aim of this study is to evaluate the influence of BPD on the release of GLP-2. METHODS: This is a prospective cohort study that evaluated diabetic individuals with class I obesity which underwent BPD (Scopinaro operation) and were followed up for 12 months...
January 18, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28101269/metagenomic-approaches-to-identify-novel-organisms-from-the-soil-environment-in-a-classroom-setting
#6
Sadia J Rahman, Trevor C Charles, Parjit Kaur
Molecular Microbial Metagenomics is a research-based undergraduate course developed at Georgia State University. This semester-long course provides hands-on research experience in the area of microbial diversity and introduces molecular approaches to study diversity. Students are part of an ongoing research project that uses metagenomic approaches to isolate clones containing 16S ribosomal ribonucleic acid (rRNA) genes from a soil metagenomic library. These approaches not only provide a measure of microbial diversity in the sample but may also allow discovery of novel organisms...
December 2016: Journal of Microbiology & Biology Education: JMBE
https://www.readbyqxmd.com/read/28099798/development-of-a-quechers-based-method-for-the-simultaneous-determination-of-acidic-pesticides-their-esters-and-conjugates-following-alkaline-hydrolysis
#7
Angelika Steinborn, Lutz Alder, Madeleine Spitzke, Daniela Doerk, Michelangelo Anastassiades
An analytical procedure was developed allowing the simultaneous determination of acidic pesticides and their conjugates by addition of an alkaline hydrolysis step into the EU version of the QuEChERS method. The procedure resulted additionally in hydrolysis of most esters of phenoxy acids. Based on information from metabolism studies and the hydrolytic conditions employed in supervised field trials as well as results on the influence of physical and chemical parameters (temperature, time, type of solvent, type of matrix) alkaline hydrolysis for 30 min at 40 °C was deemed as a good compromise for the determination of residues of 2,4-D, dichlorprop, fluazifop, haloxyfop, MCPA and MCPB...
January 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28096863/seroepidemiological-study-of-toxocariasis-in-the-owners-of-domestic-cats-and-dogs-in-mashhad-northeastern-iran
#8
Fariba Berenji, Ali Pouryousef, Abdolmajid Fata, Mahmoud Mahmoudi, Maryam Salehi, Javad Khoshnegah
BACKGROUND: Toxocariasis is the clinical terms applied to infection of human with Ascarid nematodes in the order Ascaridida, named Toxocara canis and T. cati. Because in recent years in Iran many people desire to keep pets (cats and dogs), and lacking of seroepidemiological study of toxocariasis in Mashhad, we decided to determine the seroprevalence of toxocariasis among people who own cats and dogs in comparison with control group. METHODS: A serological study for detection antibodies to Toxocara in two groups (93 cat and dog owners and 93 healthy people as control group) was conducted from Feb 2013 to Dec 2013...
April 2016: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/28095905/imputing-hiv-treatment-start-dates-from-routine-laboratory-data-in-south-africa-a-validation-study
#9
Mhairi Maskew, Jacob Bor, Cheryl Hendrickson, William MacLeod, Till Bärnighausen, Deenan Pillay, Ian Sanne, Sergio Carmona, Wendy Stevens, Matthew P Fox
BACKGROUND: Poor clinical record keeping hinders health systems monitoring and patient care in many low resource settings. We develop and validate a novel method to impute dates of antiretroviral treatment (ART) initiation from routine laboratory data in South Africa's public sector HIV program. This method will enable monitoring of the national ART program using real-time laboratory data, avoiding the error potential of chart review. METHODS: We developed an algorithm to impute ART start dates based on the date of a patient's "ART workup", i...
January 17, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28095434/field-evaluation-of-a-high-throughput-loop-mediated-isothermal-amplification-test-for-the-detection-of-asymptomatic-plasmodium-infections-in-zanzibar
#10
Berit Aydin-Schmidt, Ulrika Morris, Xavier C Ding, Irina Jovel, Mwinyi I Msellem, Daniel Bergman, Atiqul Islam, Abdullah S Ali, Spencer Polley, Iveth J Gonzalez, Andreas Mårtensson, Anders Björkman
BACKGROUND: New field applicable diagnostic tools are needed for highly sensitive detection of residual malaria infections in pre-elimination settings. Field performance of a high throughput DNA extraction system for loop mediated isothermal amplification (HTP-LAMP) was therefore evaluated for detecting malaria parasites among asymptomatic individuals in Zanzibar. METHODS: HTP-LAMP performance was evaluated against real-time PCR on 3008 paired blood samples collected on filter papers in a community-based survey in 2015...
2017: PloS One
https://www.readbyqxmd.com/read/28093379/the-epital-care-model-a-new-person-centered-model-of-technology-enabled-integrated-care-for-people-with-long-term-conditions
#11
Klaus Phanareth, Søren Vingtoft, Anders Skovbo Christensen, Jakob Sylvest Nielsen, Jørgen Svenstrup, Gro Karine Rosvold Berntsen, Stanton Peter Newman, Lars Kayser
BACKGROUND: There is worldwide recognition that the future provision of health care requires a reorganization of provision of care, with increased empowerment and engagement of patients, along with skilled health professionals delivering services that are coordinated across sectors and organizations that provide health care. Technology may be a way to enable the creation of a coherent, cocreative, person-centered method to provide health care for individuals with one or more long-term conditions (LTCs)...
January 16, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28093322/anti-pathogenic-and-probiotic-attributes-of-lactobacillus-salivarius-and-lactobacillus-plantarum-strains-isolated-from-feces-of-algerian-infants-and-adults
#12
Hamza Ait Seddik, Farida Bendali, Benoit Cudennec, Djamel Drider
Sixty-seven (67) lactic acid bacteria (LAB) isolates belonging to Lactobacillus genus were isolated from human feces and tested for their auto-aggregation and cell surface hydrophobicity in order to establish their adhesion capabilities, a prerequisite for probiotic selection. Strains with the upmost auto-aggregation and cell surface hydrophobicity scores were identified by MALDI-TOF spectrometry and 16S rDNA sequencing as Lactobacillus plantarum (p25lb1 and p98lb1) and Lactobacillus salivarius (p85lb1 and p104lb1)...
January 13, 2017: Research in Microbiology
https://www.readbyqxmd.com/read/28091866/review-of-diagnostic-challenges-in-occupational-asthma
#13
REVIEW
Jacques A Pralong, Andre Cartier
PURPOSE OF REVIEW: Occupational asthma (OA) is one of the most frequent occupational diseases and its diagnosis is often difficult. This review summarizes its current diagnostic challenges. RECENT FINDINGS: OA is associated with significant health and socio-economic burden. It is underdiagnosed and physicians need to adopt a stepwise approach to confirm the diagnosis. Although early removal from exposure to the offending agent is associated with a better prognosis, physicians should try to confirm the diagnosis of work-related asthma before taking a worker off work...
January 2017: Current Allergy and Asthma Reports
https://www.readbyqxmd.com/read/28091760/characteristics-of-green-blue-fluorescence-generated-from-the-adaxial-sides-of-leaves-of-tree-species
#14
Masayoshi Nakayama, Tsukasa Iwashina
We discovered that some tree species have leaves whose adaxial sides show bright green-blue fluorescence upon exposure to ultraviolet irradiation. In total, 141 native Japanese species belonging to 47 families were analyzed, and the brightness of the leaf fluorescence, represented by the L* values (Lab color space) of the pictures, was evaluated. The species possessing the brightest fluorescent leaves, with L* > 50, were Camellia japonica, Camellia sasanqua, and Cleyera japonica of Theaceae, Osmanthus heterophyllus and Ligustrum japonicum of Oleaceae, Aucuba japonica of Garryaceae, and Trochodendron aralioides of Trochodendraceae...
January 16, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28090248/just-change-the-channel-studying-effects-of-age-on-emotion-regulation-using-a-tv-watching-paradigm
#15
Molly Sands, Adam Garbacz, Derek M Isaacowitz
Older adults are theorized to benefit from proactive forms of emotion regulation that allow them to avoid negative stimuli (Charles, 2010). To test this, we examined choices as a form of emotion regulation. In two studies investigating age differences, participants selected affective stimuli using a cable television interface, while choices and mood were recorded. In lab-based Study 1, older adults spent more time watching neutral channels, but younger adults spent more time watching positive ones. Older adults also watched more low-arousal content, while younger adults watched more high-arousal content...
November 2016: Social Psychological and Personality Science
https://www.readbyqxmd.com/read/28087655/hagfish-houdinis-biomechanics-and-behavior-of-squeezing-through-small-openings
#16
Calli R Freedman, Douglas S Fudge
Hagfishes are able to squeeze through small openings to gain entry to crevices, burrows, hagfish traps, and carcasses, but little is known about how they do this, or what the limits of this ability are. The purpose of this study was to describe this ability, and to investigate possible mechanisms by which it is accomplished. We investigated the hypothesis that the passive movement of blood within a hagfish's flaccid subcutaneous sinus allows it to squeeze through narrow apertures that it would not be able to if it were turgid...
January 13, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28075415/inhibitory-effects-of-probiotic-lactobacillus-on-the-growth-of-human-colonic-carcinoma-cell-line-ht-29
#17
Zhung-Yuan Chen, You-Miin Hsieh, Chun-Chih Huang, Cheng-Chih Tsai
This study was conducted to investigate the inhibitory effect of Lactobacillus cells and supernatants on the growth of the human colon cancer cell line HT-29. Our study results indicated that the PM153 strain exhibits the best adhesion ability and the highest survival in the gastrointestinal tract simulation experiment. Furthermore, after an 8-h co-culture of PM153 and HT-29 cells, the PM153 strain can induce the secretion of nitric oxide from the HT-29 cells. In addition, after the co-culture of the BCRC17010 strain (10⁸ cfu/mL) and HT-29 cells, the Bax/Bcl-2 ratio in the HT-29 cells was 1...
January 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28073898/two-stage-isothermal-enzymatic-amplification-for-concurrent-multiplex-molecular-detection
#18
Jinzhao Song, Changchun Liu, Michael G Mauk, Shelley C Rankin, James B Lok, Robert M Greenberg, Haim H Bau
BACKGROUND: The wide array of pathogens responsible for infectious diseases makes it difficult to identify causative pathogens with single-plex tests. Although multiplex PCR detects multiple targets, it is restricted to centralized laboratories, which delays test results or makes multiplexing unavailable, depriving healthcare providers of critical, real-time information. METHODS: To address the need for point-of-care (POC) highly multiplexed tests, we propose the 2-stage, nested-like, rapid (<40 min) isothermal amplification assay, dubbed rapid amplification (RAMP)...
January 10, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28071640/innovation-in-chemotherapy-administration-process
#19
A Aziz
INTRODUCTION: This project was started after patient's complaints of increased cost burden on patients with increase stay of patient in hospital for chemotherapy administration for 3-4 days, how to decrease this hospital stay and financial burden and how can we improve services to decrease hospital stay and expedite the process of chemotherapy administration. METHODS: A total of 100 patients' confidential files reviewed from February 12, 2013 to May 15, 2013, patients, who were admitted for chemotherapy administration only in inpatient area and all services timings, were reviewed and documented on sheet named as delays chemotherapy sheet, nine processes timings checked against their benchmarks...
April 2016: Indian Journal of Cancer
https://www.readbyqxmd.com/read/28070656/peri-procedural-use-of-anticoagulants-in-radiology-an-evidence-based-review
#20
REVIEW
Thomas D Atwell, Paul W Wennberg, Brendan P McMenomy, Naveen S Murthy, Jeremy R Anderson, J Scott Kriegshauser, J Mark McKinney
Peri-procedural anticoagulant management hinges on the balance of hemorrhagic and thrombotic complications. The radiologist is tasked with accurately assessing the hemorrhagic risk for patients undergoing procedures, taking into account procedural bleeding rates, underlying coagulopathy based on lab tests, and use of anticoagulants. The purpose of this article is to provide a contemporary review of commonly used anticoagulants and, incorporating published evidence, review their management related to image-guided procedures...
January 9, 2017: Abdominal Radiology
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