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https://www.readbyqxmd.com/read/29787036/reflections-of-a-black-african-insider-researcher
#1
Isaac Tuffour
BACKGROUND: There is a growing body of literature providing reflective accounts and critical examination of the challenges faced by insider researchers. However, there is little research about the specific challenges that black African insider nurse researchers face. AIM: To reflect on the complexities black African insider nurse researchers face in the context of research sites, participants and the interpretation of data. DISCUSSION: Insider researchers are susceptible to various entanglements and dilemmas...
May 22, 2018: Nurse Researcher
https://www.readbyqxmd.com/read/29786885/automated-buildup-of-biomimetic-films-in-cell-culture-microplates-for-high-throughput-screening-of-cellular-behaviors
#2
Paul Machillot, Catarina Quintal, Fabien Dalonneau, Loic Hermant, Pauline Monnot, Kelsey Matthews, Vincent Fitzpatrick, Jie Liu, Isabelle Pignot-Paintrand, Catherine Picart
An automatic method is established for layer-by-layer (LbL) assembly of biomimetic coatings in cell culture microplates using a commercial liquid-handling robot. Highly homogeneous thin films are formed at the bottom of each microwell. The LbL film-coated microplates are compatible with common cellular assays, using microplate readers and automated microscopes. Cellular adhesion is screened on crosslinked and peptide-functionalized LbL films and stem cell differentiation in response to increasing doses of bone morphogenetic proteins (2, 4, 7, 9)...
May 22, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29786837/high-intensity-ultrasound-for-salmonella-enteritidis-inactivation-in-culture-and-liquid-whole-eggs
#3
Chayapa Techathuvanan, Doris Helen D'Souza
High intensity ultrasound (HIU) continues to be researched as a nonthermal inactivation technology of appeal to food manufacturers. The advantages of HIU include maintenance of product quality, freshness, product homogenization, along with simultaneous inactivation of pathogens. Besides, it is simple, relatively inexpensive, and easily adaptable to most processing environments. This study investigated the effect of HIU for Salmonella Enteritidis inactivation in culture and liquid whole eggs (LWEs) to decrease egg-associated outbreaks...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29786830/blue-light-filtering-intraocular-lenses-iols-for-protecting-macular-health
#4
REVIEW
Laura E Downie, Ljoudmila Busija, Peter R Keller
BACKGROUND: An intraocular lens (IOL) is a synthetic lens that is surgically implanted within the eye following removal of the crystalline lens, during cataract surgery. While all modern IOLs attenuate the transmission of ultra-violet (UV) light, some IOLs, called blue-blocking or blue-light filtering IOLs, also reduce short-wavelength visible light transmission. The rationale for blue-light filtering IOLs derives primarily from cell culture and animal studies, which suggest that short-wavelength visible light can induce retinal photoxicity...
May 22, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29786797/nmr-based-prostate-cancer-metabolomics
#5
Leslie R Euceda, Maria K Andersen, May-Britt Tessem, Siver A Moestue, Maria T Grinde, Tone F Bathen
Prostate cancer is the second most common malignancy, and the fifth leading cause of cancer-related death among men, worldwide. A major unsolved clinical challenge in prostate cancer is the ability to accurately distinguish indolent cancer types from the aggressive ones. Reprogramming of metabolism is now a widely accepted hallmark of cancer development, where cancer cells must be able to convert nutrients to biomass while maintaining energy production. Metabolomics is the large-scale study of small molecules, commonly known as metabolites, within cells, biofluids, tissues, or organisms...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786793/a-method-for-prostate-and-breast-cancer-cell-spheroid-cultures-using-gelatin-methacryloyl-based-hydrogels
#6
Christoph Meinert, Christina Theodoropoulos, Travis J Klein, Dietmar W Hutmacher, Daniela Loessner
Modern tissue engineering technologies have delivered tools to recreate a cell's naturally occurring niche in vitro and to investigate normal and pathological cell-cell and cell-niche interactions. Hydrogel biomaterials mimic crucial properties of native extracellular matrices, including mechanical support, cell adhesion sites and proteolytic degradability. As such, they are applied as 3D cell culture platforms to replicate tissue-like architectures observed in vivo, allowing physiologically relevant cell behaviors...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786786/methodologies-applied-to-establish-cell-cultures-in-prostate-cancer
#7
Anne T Collins
This chapter focuses on primary cultures of the human malignant prostate. Current abilities to isolate and culture stem cells, transit-amplifying cells, and secretory luminal cells are described. Advantages and limitations of this model system are also discussed.
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786785/methods-to-study-angiogenesis-in-a-mouse-model-of-prostate-cancer
#8
Ana-Rita Pedrosa, Alexandre Trindade, António Duarte
Angiogenesis is one important hallmark of cancer progression which explains the relevance of developing methods to efficiently analyze the neo-angiogenic process. In this report we make use of the transgenic adenocarcinoma of the murine prostate (TRAMP) model, considered a good model for studying clinical prostate cancer progression, to describe in detail the methods used to study angiogenesis in this type of solid tumor development. In this report we provide step-by-step procedures on the basis of previous work in our laboratory for: the mouse urogenital sinus (UGS) collection; microdissection of the prostate; preparation of the prostatic samples for immunofluorescence (to analyze vascular density, morphology, maturation, functionality, hypoxia, and others); preparation of prostatic samples to histopathological analysis and/or immunohistochemistry; and endothelial and vascular mural cell sorting and isolation by fluorescent associated cell sorting (FACS) to further analysis (mRNA, protein, or other) or to maintain in culture...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29786783/a-xenograft-model-for-venous-malformation
#9
Jillian Goines, Xian Li, Yuqi Cai, Paula Mobberley-Schuman, Megan Metcalf, Steven J Fishman, Denise M Adams, Adrienne M Hammill, Elisa Boscolo
Vascular malformations are defects caused by the abnormal growth of the vasculature. Among them, venous malformation (VM) is an anomaly characterized by slow-flow vascular lesions with abnormally shaped veins, typically in sponge-like configuration. VMs can expand over years causing disfigurement, obstruction of vital structures, thrombosis, bleeding, and pain. Treatments have been very limited and primarily based on supportive care, compression garments, sclerotherapy, and/or surgical resection. Sirolimus treatment has recently shown efficacy in some patients with complicated vascular anomalies, including VMs...
May 21, 2018: Angiogenesis
https://www.readbyqxmd.com/read/29786779/dnmt3a-controls-mir-200b-in-cardiac-fibroblast-autophagy-and-cardiac-fibrosis
#10
Xu-Dong Zhao, Run-He Qin, Jing-Jing Yang, Sheng-Song Xu, Hui Tao, Xuan-Sheng Ding, Kai-Hu Shi
AIM AND OBJECTIVE: Regulation of microRNA gene expression by DNA methylation may represent a key mechanism to drive cardiac fibrosis progression. Cardiac fibroblast autophagy is the primary source of cardiac fibrosis, but the mechanisms underlying this process are incompletely understood. Here we found that DNMT3A suppression of the microRNA-200b (miR-200b) through pathway leads to cardiac fibroblast autophagy in cardiac fibrosis. METHODS: To understand the impact of DNMT3A on miR-200b at cardiac fibrosis, the rat cardiac fibrosis model was established via the abdominal aortic coarctation...
May 21, 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29786756/backbone-nmr-assignments-of-hypf-n-under-conditions-generating-toxic-and-non-toxic-oligomers
#11
Jayneil R Patel, Yingqi Xu, Claudia Capitini, Fabrizio Chiti, Alfonso De Simone
The HypF protein is involved in the maturation and regulation of hydrogenases. The N-terminal domain of HypF (HypF-N) has served as a key model system to study the pathways of protein amyloid formation and the nature of the toxicity of pre-fibrilar protein oligomers. This domain can aggregate into two forms of oligomers having significantly different toxic effects when added to neuronal cultures. Here, NMR assignments of HypF-N backbone resonances are presented in its native state and under the conditions favouring the formation of toxic and non-toxic oligomers...
May 21, 2018: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/29786754/regulation-of-interferon-signaling-and-hcv%C3%A2-rna-replication-by-extracellular-matrix
#12
Takuya Kuwashiro, Shinji Iwane, Xia Jinghe, Sachiko Matsuhashi, Yuichiro Eguchi, Keizo Anzai, Kazuma Fujimoto, Toshihiko Mizuta, Naoya Sakamoto, Masanori Ikeda, Nobuyuki Kato, Iwata Ozaki
Although interferon (IFN)‑based treatment of patients with chronic hepatitis C virus (HCV) infection is widely applied, treatment resistance is often observed in patients with advanced liver fibrosis. Given that the molecular mechanisms of IFN resistance in liver fibrosis remain elusive, the present study investigated the effects of extracellular matrix (ECM) on IFN signaling in hepatic cells. The native HuH‑7 human hepatoma cell line and HuH‑7 cells were stably transfected with full‑length HCV‑RNA fused with Renilla luciferase (OR6 cells) were cultured on ECM‑coated dishes or non‑coated plastic dishes (NDs), and treated with human IFN‑α...
May 18, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29786744/mir%C3%A2-133b-regulates-proliferation-and-apoptosis-in-high%C3%A2-glucose%C3%A2-induced-human-retinal-endothelial-cells-by-targeting-ras-homolog-family-member-a
#13
Jun Yao, Jihong Wang, Yong Yao, Kelei Wang, Qianqian Zhou, Ying Tang
The aim of the present study was to investigate the role of microRNA (miR)‑133b in high‑glucose‑induced human retinal endothelial cells (hRECs), particularly regarding its potential targeting of ras homolog family member A (RhoA). To establish the high‑glucose‑induced diabetic retinopathy (DR) model, hRECs were cultured in high‑glucose medium for 1, 2 and 3 days. An Annexin allophycocyanin (APC)/7‑aminoactinomycin D (7‑AAD) staining assay was performed to measure the apoptosis of hRECs. Next, the cells were transfected with miR‑133b inhibitors or mimics, and the cell proliferation and apoptosis were measured by MTT and Annexin‑APC/7‑AAD staining assays, respectively...
May 18, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29786743/role-of-tgf%C3%A2-%C3%AE-1-expressed-in-bone-marrow%C3%A2-derived-mesenchymal-stem-cells-in-promoting-bone-formation-in-a-rabbit-femoral-defect-model
#14
Bing-Yin Sun, Bao-Xiang Zhao, Jie-Ying Zhu, Zheng-Ping Sun, Yong-An Shi, Feng Huang
Bone defects represent a major clinical and socioeconomic problem without suitable treatment options. Previous studies have shown that transforming growth factor β1 (TGF‑β1) is important in the development of various diseases. The present study aimed to investigate the therapeutic potential of rabbit bone marrow‑derived mesenchymal stem cells (BMSCs) expressing TGF‑β1 in the treatment of rabbit femoral defects. First, rabbit BMSCs were identified and cultured. TGF‑β1 was then stably overexpressed in the rabbit BMSCs by lentivirus transfection, which was expressed at a high level in the femoral defects treated with TGF‑β1‑overexpressing BMSCs, compared with PBS‑treated controls...
May 17, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29786653/role-for-cystathionine-%C3%AE-lyase-cse-in-an-ethanol-e-induced-lesion-in-fetal-brain-gsh-homeostasis
#15
Dhyanesh Patel, Marylatha Rathinam, Courtney Jarvis, Lenin Mahimainathan, George Henderson, Madhusudhanan Narasimhan
Earlier, we reported that gestational ethanol (E) can dysregulate neuron glutathione (GSH) homeostasis partially via impairing the EAAC1-mediated inward transport of Cysteine (Cys) and this can affect fetal brain development. In this study, we investigated if there is a role for the transulfuration pathway (TSP), a critical bio-synthetic point to supply Cys in E-induced dysregulation of GSH homeostasis. These studies utilized an in utero E binge model where the pregnant Sprague⁻Dawley (SD) rat dams received five doses of E at 3...
May 22, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29786652/consumer-perception-of-the-quality-of-lamb-and-lamb-confit
#16
Guillermo Ripoll, Margalida Joy, Begoña Panea
The patterns of food consumption in general and those of meat, in particular, are constantly changing. These changes are due not only to socioeconomic and cultural trends that affect the whole society but also to the specific lifestyles of consumer groups. Due to the importance of consumer lifestyle, the objectives of this study were (i) to identify the profiles of lamb meat consumers according to their orientation toward convenience, as defined by their eating and cooking habits; (ii) to characterize these profiles according to their socioeconomic characteristics and their preferences regarding the intrinsic and extrinsic quality signals of lamb meat; and (iii) to analyze the willingness to pay for lamb confit...
May 22, 2018: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29786602/microfluidic-system-for-modelling-3d-tumour-invasion-into-surrounding-stroma-and-drug-screening
#17
Zhichang Du, Shengli Mi, Xiaoman Yi, Yuanyuan Xu, Wei Sun
Tumour invasion into the surrounding stroma is a critical step in metastasis, and it is necessary to clarify the role of microenvironmental factors in tumour invasion. We present a microfluidic system that simulated and controlled multi-factors of the tumour microenvironment for three-dimensional (3D) assessment of tumour invasion into the stroma. The simultaneous, precise and continuous arrangement of two 3D matrices was visualised to observe the migration of cancer cell populations or single cells by transfecting cells with a fluorescent protein...
May 22, 2018: Biofabrication
https://www.readbyqxmd.com/read/29786565/modelling-non-alcoholic-fatty-liver-disease-in-human-hepatocyte-like-cells
#18
Marcus J Lyall, Jessy Cartier, John P Thomson, Kate Cameron, Jose Meseguer-Ripolles, Eoghan O'Duibhir, Dagmara Szkolnicka, Baltasar Lucendo Villarin, Yu Wang, Giovanny Rodriguez Blanco, Warwick B Dunn, Richard R Meehan, David C Hay, Amanda J Drake
Non-alcoholic fatty liver disease (NAFLD) is the most common cause of liver disease in developed countries. An in vitro NAFLD model would permit mechanistic studies and enable high-throughput therapeutic screening. While hepatic cancer-derived cell lines are a convenient, renewable resource, their genomic, epigenomic and functional alterations mean their utility in NAFLD modelling is unclear. Additionally, the epigenetic mark 5-hydroxymethylcytosine (5hmC), a cell lineage identifier, is rapidly lost during cell culture, alongside expression of the Ten-eleven-translocation ( TET ) methylcytosine dioxygenase enzymes, restricting meaningful epigenetic analysis...
July 5, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29786564/developing-defined-substrates-for-stem-cell-culture-and-differentiation
#19
REVIEW
Louise Hagbard, Katherine Cameron, Paul August, Christopher Penton, Malin Parmar, David C Hay, Therése Kallur
Over the past few decades, a variety of different reagents for stem cell maintenance and differentiation have been commercialized. These reagents share a common goal in facilitating the manufacture of products suitable for cell therapy while reducing the amount of non-defined components. Lessons from developmental biology have identified signalling molecules that can guide the differentiation process in vitro , but less attention has been paid to the extracellular matrix used. With the introduction of more biologically relevant and defined matrices, that better mimic specific cell niches, researchers now have powerful resources to fine-tune their in vitro differentiation systems, which may allow the manufacture of therapeutically relevant cell types...
July 5, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29786562/application-of-hepatocyte-like-cells-to-enhance-hepatic-safety-risk-assessment-in-drug-discovery
#20
REVIEW
Dominic P Williams
Hepatic stress and injury from drugs continues to be a major concern within the pharmaceutical industry, leading to preclinical and clinical attrition precautionary warnings and post-market withdrawal of drugs. There is a requirement for more predictive and mechanistically accurate models to aid risk assessment. Primary human hepatocytes, subject to isolation stress, cryopreservation, donor-to-donor variation and a relatively short period of functional capability in two-dimensional cultures, are not suitable for high-throughput screening procedures...
July 5, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
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