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https://www.readbyqxmd.com/read/28449469/cd90-positive-cells-exhibit-aggressive-radioresistance-in-esophageal-squamous-cell-carcinoma
#1
Yuandong Wang, Chi Zhang, Hongcheng Zhu, Junwei Tang, Shu Zhang, Jinhua Luo, Xinchen Sun
BACKGROUND: Cancer stem cells (CSCs) are widely abundant and considered to be an important factor in therapy resistance. They are also promising potential targets for conquering tumors. We explored the effects of radiation on stem cell-like tumor cells via the candidate marker CD90 to provide new ideas for the comprehensive treatment of esophageal squamous cell carcinoma (ESCC). METHODS: We constructed CD90 overexpression ESCC cells by lentiviral transfection and observed differences of toxicity, proliferation, clone number, apoptosis, migration, invasion, and in vivo tumor formation after irradiation...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449399/comparative-transcriptomic-analysis-of-bombyx-mori-fat-body-tissue-following-dietary-restriction
#2
Ye Pan, Peng Lü, Qinyun Wang, Feifei Zhu, Chengjun Li, Yuanqing He, Keping Chen
Dietary restriction (DR) refers to a reduction in food intake to induce undernutrition but not malnutrition, which extends the lifespan of multiple species. Although there are invertebrate aging models, such as the Caenorhabditis elegans and Drosophila melanogaster, aging studies in Lepidoptera are few in number and the underlying life-extending molecular mechanisms are not clear. Research on a broader range of animals is necessary to support generalizations on mechanisms of aging and rates of aging. The aim of this study was to further investigate genes and pathways associated with DR in Bombyx mori...
May 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/28449330/exploring-the-experience-of-nurse-practitioners-who-have-committed-medical-errors-a-phenomenological-approach
#3
Romuald Delacroix
BACKGROUND AND PURPOSE: To explore the experience of committing medical error from the perspective of nurse practitioners (NPs). Overall, the purpose of the study is to discern NPs' behaviors, perceptions, and coping mechanisms in response to having made a medical error. METHODS: Qualitative research based on two face-to-face audio-recorded semistructured interviews with 10 NPs who had made medical errors in practice. The analysis was guided by concepts in phenomenology...
April 27, 2017: Journal of the American Association of Nurse Practitioners
https://www.readbyqxmd.com/read/28449262/predictive-mechanisms-linking-brain-opioids-to-chronic-pain-vulnerability-and-resilience
#4
REVIEW
Anthony Kenneth Peter Jones, Christopher Andrew Brown
Chronic pain is a major global healthcare problem that is currently inadequately treated. In addition, the current use of opioids for treatment has reached far beyond the paucity of evidence for long-term benefits relative to risks. Benefit-risk models for opioid and non-opioid treatments would benefit from a rational, mechanism-based understanding of neuroplastic and neurochemical contributions to chronic pain. Here we evaluate the findings and limitations of representative research investigating brain neuroplasticity and neurochemistry in chronic pain...
April 27, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28448889/studies-on-the-metabolites-difference-of-psoralen-isopsoralen-in-human-and-six-mammalian-liver-microsomes-in-vitro-by-uhplc-ms-ms
#5
Aihong Yang, Junxiu Chen, Yetao Ma, Lili Wang, Yaowen Fan, Xin He
Psoralen and isopsoralen are found in many fruits, vegetables and traditional Chinese medicines (TCM), such as Ficus carica L., Celery, Fructus Psoraleae etc. Modern pharmacological studies found that psoralen and isopsoralen can show estrogen-like activity, antitumor, and antibacterial activities etc. However, some research results also show some liver damage associated with the use of psoralen/isopsoralen or related medicines in human. Many studies focus on the pharmacological activities of psoralen/isopsoralen, while it is important to choose the suitable pharmacological models which are relevant to human in drug metabolism and pharmacokinetic process...
April 20, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28448694/the-joint-effect-of-air-pollution-exposure-and-copy-number-variation-on-risk-for-autism
#6
Dokyoon Kim, Heather Volk, Santhosh Girirajan, Sarah Pendergrass, Molly A Hall, Shefali S Verma, Rebecca J Schmidt, Robin L Hansen, Debashis Ghosh, Yunin Ludena-Rodriguez, Kyoungmi Kim, Marylyn D Ritchie, Irva Hertz-Picciotto, Scott B Selleck
Autism spectrum disorder is a complex trait with a high degree of heritability as well as documented susceptibility from environmental factors. In this study the contributions of copy number variation, exposure to air pollutants, and the interaction between the two on autism risk, were evaluated in the population-based case-control Childhood Autism Risks from Genetics and Environment (CHARGE) Study. For the current investigation, we included only those CHARGE children (a) who met criteria for autism or typical development and (b) for whom our team had conducted both genetic evaluation of copy number burden and determination of environmental air pollution exposures based on mapping addresses from the pregnancy and early childhood...
April 27, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28448616/abundance-profiling-of-specific-gene-groups-using-precomputed-gut-metagenomes-yields-novel-biological-hypotheses
#7
Konstantin Yarygin, Alexander Tyakht, Andrey Larin, Elena Kostryukova, Sergei Kolchenko, Vilgelm Bitner, Dmitry Alexeev
The gut microbiota is essentially a multifunctional bioreactor within a human being. The exploration of its enormous metabolic potential provides insights into the mechanisms underlying microbial ecology and interactions with the host. The data obtained using "shotgun" metagenomics capture information about the whole spectrum of microbial functions. However, each new study presenting new sequencing data tends to extract only a little of the information concerning the metabolic potential and often omits specific functions...
2017: PloS One
https://www.readbyqxmd.com/read/28448590/significant-changes-in-circulating-microrna-by-dietary-supplementation-of-selenium-and-coenzyme-q10-in-healthy-elderly-males-a-subgroup-analysis-of-a-prospective-randomized-double-blind-placebo-controlled-trial-among-elderly-swedish-citizens
#8
Urban Alehagen, Peter Johansson, Jan Aaseth, Jan Alexander, Dick Wågsäter
BACKGROUND: Selenium and coenzyme Q10 is essential for important cellular functions. A low selenium intake is reported from many European countries, and the endogenous coenzyme Q10 production is decreasing in the body with increasing age. Supplementation with selenium and coenzyme Q10 in elderly have shown reduced cardiovascular mortality and reduced levels of markers of inflammation. However, microRNA analyses could give important information on the mechanisms behind the clinical effects of supplementation...
2017: PloS One
https://www.readbyqxmd.com/read/28448505/polyphenolic-extract-of-insp-5-ptase-expressing-tomato-plants-reduce-the-proliferation-of-mcf-7-breast-cancer-cells
#9
Mohammad Alimohammadi, Mohamed Hassen Lahiani, Diamond McGehee, Mariya Khodakovskaya
In recent years, by extensive achievements in understanding the mechanisms and the pathways affected by cancer, the focus of cancer research is shifting from developing new chemotherapy methods to using natural compounds with therapeutic properties to reduce the adverse effects of synthetic drugs on human health. We used fruit extracts from previously generated human type I InsP 5-ptase gene expressing transgenic tomato plants for assessment of the anti-cancer activity of established genetically modified tomato lines...
2017: PloS One
https://www.readbyqxmd.com/read/28448318/two-state-collaborative-study-of-a-multifaceted-intervention-to-decrease-ventilator-associated-events
#10
Nishi Rawat, Ting Yang, Kisha J Ali, Mary Catanzaro, Mariah D Cohen, Donna O Farley, Lisa H Lubomski, David A Thompson, Bradford D Winters, Sara E Cosgrove, Michael Klompas, Kathleen A Speck, Sean M Berenholtz
OBJECTIVES: Ventilator-associated events are associated with increased mortality, prolonged mechanical ventilation, and longer ICU stay. Given strong national interest in improving ventilated patient care, the National Institute of Health and Agency for Healthcare Research and Quality funded a two-state collaborative to reduce ventilator-associated events. We describe the collaborative's impact on ventilator-associated event rates in 56 ICUs. DESIGN: Longitudinal quasi-experimental study...
April 26, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28448277/long-term-consequences-of-obesity-on-female-fertility-and-the-health-of-the-offspring
#11
Suchitra Chandrasekaran, Genevieve Neal-Perry
PURPOSE OF REVIEW: Obesity has reached near epidemic levels among reproductive age women with a myriad of consequences. Obesity adversely affects the maternal milieu by creating conditions that decrease fertility and increase the risk of gestational diabetes, hypertensive disease in pregnancy, fetal growth abnormalities and congenital anomalies. The effects of obesity are not limited to pregnancy. Indeed, beyond the immediate postpartum period, obese women maintain a higher prevalence of insulin resistance and cardiovascular disease...
April 26, 2017: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28448053/automated-contraction-analysis-of-human-engineered-heart-tissue-for-cardiac-drug-safety-screening
#12
Ingra Mannhardt, Umber Saleem, Anika Benzin, Thomas Schulze, Birgit Klampe, Thomas Eschenhagen, Arne Hansen
Cardiac tissue engineering describes techniques to constitute three dimensional force-generating engineered tissues. For the implementation of these procedures in basic research and preclinical drug development, it is important to develop protocols for automated generation and analysis under standardized conditions. Here, we present a technique to generate engineered heart tissue (EHT) from cardiomyocytes of different species (rat, mouse, human). The technique relies on the assembly of a fibrin-gel containing dissociated cardiomyocytes between elastic polydimethylsiloxane (PDMS) posts in a 24-well format...
April 15, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448036/using-microfluidic-devices-to-measure-lifespan-and-cellular-phenotypes-in-single-budding-yeast-cells
#13
Ke Zou, Diana S Ren, Qi Ou-Yang, Hao Li, Jiashun Zheng
Budding yeast Saccharomyces cerevisiae is an important model organism in aging research. Genetic studies have revealed many genes with conserved effects on the lifespan across species. However, the molecular causes of aging and death remain elusive. To gain a systematic understanding of the molecular mechanisms underlying yeast aging, we need high-throughput methods to measure lifespan and to quantify various cellular and molecular phenotypes in single cells. Previously, we developed microfluidic devices to track budding yeast mother cells throughout their lifespan while flushing away newborn daughter cells...
March 30, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28448021/detection-of-ligand-activated-g-protein-coupled-receptor-internalization-by-confocal-microscopy
#14
Jingwen Yang, Yunjun Yan, Xiaowei Xiang, Yuchao Xu, Naiming Zhou, Tianming Wang
Confocal laser scanning microscopy (CLSM) is an optical imaging technique for high-contrast imaging. It is a powerful approach to visualize fluorescent fusion proteins, such as green fluorescent protein (GFP), to determine their expression, localization, and function. The subcellular localization of target proteins is important for identification, characterization, and functional analyses. Internalization is one of the predominant mechanisms controlling G protein-coupled receptor (GPCR) signaling to ensure the appropriate cellular responses to stimuli...
April 9, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447997/dielectric-rheosans-simultaneous-interrogation-of-impedance-rheology-and-small-angle-neutron-scattering-of-complex-fluids
#15
Jeffrey J Richards, Cedric V L Gagnon, Jeffery R Krzywon, Norman J Wagner, Paul D Butler
A procedure for the operation of a new dielectric RheoSANS instrument capable of simultaneous interrogation of the electrical, mechanical and microstructural properties of complex fluids is presented. The instrument consists of a Couette geometry contained within a modified forced convection oven mounted on a commercial rheometer. This instrument is available for use on the small angle neutron scattering (SANS) beamlines at the National Institute of Standards and Technology (NIST) Center for Neutron Research (NCNR)...
April 10, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447988/increased-recovery-time-and-decreased-lps-administration-to-study-the-vagus-nerve-stimulation-mechanisms-in-limited-inflammatory-responses
#16
Erwan Le Maître, Priya Revathikumar, Johanna Estelius, Jon Lampa
Inflammation is a local response to infection and tissue damage mediated by activated macrophages, monocytes, and other immune cells that release cytokines and other mediators of inflammation. For a long time, humoral and cellular mechanisms have been studied for their role in regulating the immune response, but recent advances in the field of immunology and neuroscience have also unraveled specific neural mechanisms with interesting therapeutic potential. The so-called cholinergic anti-inflammatory pathway (CAP) has been described to control innate immune responses and inflammation in a very potent manner...
March 29, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447815/development-of-the-healthcare-triggering-questionnaire-in-adult-sexual-abuse-survivors
#17
Julie B Schnur, William F Chaplin, Kiran Khurshid, Jazmin N Mogavero, Rachel E Goldsmith, Young-Sun Lee, Leib Litman, Guy H Montgomery
OBJECTIVE: One in 4 women and 1 in 10 men in the United States are survivors of sexual abuse (SA). For these survivors, healthcare experiences may trigger memories, thoughts, feelings or sensations related to this past abuse. Such triggering can be associated with negative responses to healthcare (e.g., anxiety, avoidance). However, to date, no healthcare triggering assessment tool exists. Therefore, the study goal was to describe the prevalence of healthcare triggering, to develop a brief Healthcare Triggering Questionnaire (HTQ), and to examine its initial validity...
April 27, 2017: Psychological Trauma: Theory, Research, Practice and Policy
https://www.readbyqxmd.com/read/28447671/the-scaffold-microenvironment-for-stem-cell-based-bone-tissue-engineering
#18
REVIEW
Zhichao Hao, Zhenhua Song, Jun Huang, Keqing Huang, Amanda Panetta, Zhipeng Gu, Jun Wu
Bone tissue engineering uses the principles and methods of engineering and life sciences to study bone structure, function and growth mechanism for the purposes of repairing, maintaining and improving damaged bone tissue. Scaffolds not only provide structural support for stem cells in cell adhesion and proliferation and bone formation, but also serve as a microenvironment for guiding stem cell differentiation and tissue regeneration and for controlling tissue structure. This review presents the research status of the scaffold microenvironment for bone-related stem cells based on bone tissue engineering...
April 27, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28447608/common-variants-in-zmiz1-and-near-ngf-confer-risk-for-primary-dysmenorrhoea
#19
Zhiqiang Li, Jianhua Chen, Ying Zhao, Yujiong Wang, Jinrui Xu, Jue Ji, Jingyi Shen, Weiping Zhang, Zuosong Chen, Qilin Sun, Lijuan Mao, Shulin Cheng, Bo Yang, Dongtao Zhang, Yufeng Xu, Yingying Zhao, Danping Liu, Yinhuan Shen, Weijie Zhang, Changgui Li, Jiawei Shen, Yongyong Shi
Primary dysmenorrhoea, defined as painful menstrual cramps in the absence of pelvic pathology, is a common problem in women of reproductive age. Its aetiology and pathophysiology remain largely unknown. Here we performed a two-stage genome-wide association study and subsequent replication study to identify genetic factors associated with primary dysmenorrhoea in a total of 6,770 Chinese individuals. Our analysis provided evidence of a significant (P<5 × 10(-8)) association at rs76518691 in the gene ZMIZ1 and at rs7523831 near NGF...
April 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28447541/sensor-array-for-detection-of-organic-and-inorganic-contaminants-in-post-consumer-recycled-plastics-for-food-contact
#20
Nathan Davis, Jeffery Danes, Keith Vorst
Post-consumer recycled (PCR) plastic material is made by collecting used plastic products (e.g., bottles and other plastic packaging materials) and re-processing them into solid-state pellets or flakes. Plastic recycling has positive environmental benefits, but may also carry potential drawbacks due to unwanted organic and inorganic contaminants. These contaminants can migrate into food packaging made from these recycled plastic materials. The purpose of this research was to identify economically viable real-time monitoring technologies that can be used during conversion of virgin and recycled resin feedstocks (i...
April 27, 2017: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
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