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https://www.readbyqxmd.com/read/28297574/bioactive-lipids-and-circulating-progenitor-cells-in-patients-with-cardiovascular-disease
#1
Salim S Hayek, Yuri Klyachkin, Ahmed Asfour, Nima Ghasemzadeh, Mosaab Awad, Iraj Hesaroieh, Hina Ahmed, Brandon Gray, Jinhee Kim, Edmund K Waller, Arshed A Quyyumi, Ahmed K Abdel-Latif
Bone marrow-derived progenitor cells are mobilized into the peripheral blood after acute myocardial injury and in chronic ischemic heart disease. However, the mechanisms responsible for this mobilization are poorly understood. We examined the relationship between plasma levels of bioactive lipids and number of circulating progenitor cells (CPCs) in patients (N = 437) undergoing elective or emergent cardiac catheterization. Plasma levels of sphingosine-1 phosphate (S1P) and ceramide-1 phosphate (C1P) were quantified using mass spectrometry...
March 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28296180/antioxidant-capacity-phenolic-constituents-and-toxicity-of-hot-water-extract-from-red-maple-buds
#2
Naamwin R Meda, Patrice E Poubelle, Tatjana Stevanovic
The present study reports, for the first time, the results of the antioxidant capacity and the phenolic composition of a hot water extract from red maple buds (RMB), as well as its safety. In this regard and comparatively to antioxidant standards, this extract exhibits a significant antiradical capacity when tested by 2,2-diphenyl-1-picrylhydrazyl (DPPH•) and anion superoxide trapping assays. High-resolution mass spectrometric (HRMS) and Nuclear Magnetic Resonance (NMR) analyses permitted to determine for the first time, in red maple species, cyanidin-3-O-glucoside, quercetin-3-O-galactoside, quercetin-3-O-arabinoside and quercetin...
March 11, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28295966/three-dimensional-intracellular-transport-in-neuron-bodies-and-neurites-investigated-by-label-free-dispersion-relation-phase-spectroscopy
#3
Mikhail E Kandel, Daniel Fernandes, Alison M Taylor, Haadi Shakir, Catherine Best-Popescu, Gabriel Popescu
Due to the limitations of fluorescence imaging techniques, the study of intracellular cargo is typically restricted to two-dimensional analyses. To overcome low light levels and the risk of phototoxicity, we employ quantitative phase imaging, a family of full-field imaging techniques that measure the optical path length shift introduced by the specimen. Specifically, we use spatial light interference microscopy (SLIM) to study the transport of mass in whole tomographic volumes and show that a time-correlation technique, dispersion-relation phase spectroscopy (DPS), can be used to simultaneously assay the horizontal and vertical traffic of mass through a cell...
March 13, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28290550/abseq-ultrahigh-throughput-single-cell-protein-profiling-with-droplet-microfluidic-barcoding
#4
Payam Shahi, Samuel C Kim, John R Haliburton, Zev J Gartner, Adam R Abate
Proteins are the primary effectors of cellular function, including cellular metabolism, structural dynamics, and information processing. However, quantitative characterization of proteins at the single-cell level is challenging due to the tiny amount of protein available. Here, we present Abseq, a method to detect and quantitate proteins in single cells at ultrahigh throughput. Like flow and mass cytometry, Abseq uses specific antibodies to detect epitopes of interest; however, unlike these methods, antibodies are labeled with sequence tags that can be read out with microfluidic barcoding and DNA sequencing...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28289384/theabrownin-inhibits-cell-cycle-progression-and-tumor-growth-of-lung-carcinoma-through-c-myc-related-mechanism
#5
Li Zhou, Feifei Wu, Wangdong Jin, Bo Yan, Xin Chen, Yingfei He, Weiji Yang, Wenlin Du, Qiang Zhang, Yonghua Guo, Qiang Yuan, Xiaoqiao Dong, Wenhua Yu, Jin Zhang, Luwei Xiao, Peijian Tong, Letian Shan, Thomas Efferth
Green tea, the fresh leaves of Camellia sinensis, is not only a health-promoting beverage but also a traditional Chinese medicine used for prevention or treatment of cancer, such as lung cancer. Theabrownin (TB) is the main fraction responsible for the medicinal effects of green tea, but whether it possesses anti-cancer effect is unknown yet. This study aimed to determine the in vitro and in vivo anti-lung cancer effect of TB and explore the underlying molecular mechanism, by using A549 cell line and Lewis lung carcinoma-bearing mice...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28288883/insights-regarding-fungal-phosphoproteomic-analysis
#6
REVIEW
Liliane F C Ribeiro, Cynthia L Chelius, Steven D Harris, Mark R Marten
Protein phosphorylation is a major means of regulation for cellular processes, and is important in cell signaling, growth, and cell proliferation. To study phosphorylated proteins, high throughput phosphoproteomic technologies, such as reverse phase protein array, phospho-specific flow cytometry, and mass spectrometry (MS) based technologies, have been developed. Among them, mass spectrometry has become the primary tool employed for the identification of phosphoproteins and phosphosites in fungi, leading to an improved understanding of a number of signaling pathways...
March 10, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28284152/characterization-of-zinc-stress-response-in-cyanobacterium-synechococcus-sp-iu-625
#7
Robert Newby, Lee H Lee, Jose L Perez, Xin Tao, Tinchun Chu
The ability of cyanobacteria to survive many environmental stress factors is a testament to their resilience in nature. Of these environmental stress factors, overexposure to zinc is important to study since excessive zinc intake can be a severe hazard. Zinc toxicity in freshwater has been demonstrated to affects organisms such as invertebrates, algae and cyanobacteria. Cyanobacteria which possess increased resistance to zinc have been isolated. It is therefore important to elucidate the mechanism of survival and response to determine what factors allow their survival; as well as any remediation implications they may have...
March 4, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28273149/effect-of-thermal-processing-on-t-cell-reactivity-of-shellfish-allergens-discordance-with-ige-reactivity
#8
Jodie B Abramovitch, Andreas L Lopata, Robyn E O'Hehir, Jennifer M Rolland
Crustacean allergy is a major cause of food-induced anaphylaxis. We showed previously that heating increases IgE reactivity of crustacean allergens. Here we investigate the effects of thermal processing of crustacean extracts on cellular immune reactivity. Raw and cooked black tiger prawn, banana prawn, mud crab and blue swimmer crab extracts were prepared and IgE reactivity assessed by ELISA. Mass spectrometry revealed a mix of several allergens in the raw mud crab extract but predominant heat-stable tropomyosin in the cooked extract...
2017: PloS One
https://www.readbyqxmd.com/read/28268852/distance-metric-learning-using-random-forest-for-cytometry-data
#9
M Baran Pouyan, J Birjandtalab, M Nourani
Visualization and clustering of single-cell mass cytometry (CyTOF) data are analytic techniques to identify different cell types. Most of such techniques, such as Euclidean norm, lose their effectiveness when the data dimension increases due to the curse of dimensionality. In this paper, we propose a new cell distance (called CytoRFD) that works based on Random Forest (RF) concept. The experimental results show that the proposed distance can achieve a much higher quality and effectiveness in large data analysis than traditional metrics specially for CyTOF data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264140/quantitative-phase-imaging-for-cell-culture-quality-control
#10
Lena Kastl, Michael Isbach, Dieter Dirksen, Jürgen Schnekenburger, Björn Kemper
The potential of quantitative phase imaging (QPI) with digital holographic microscopy (DHM) for quantification of cell culture quality was explored. Label-free QPI of detached single cells in suspension was performed by Michelson interferometer-based self-interference DHM. Two pancreatic tumor cell lines were chosen as cellular model and analyzed for refractive index, volume, and dry mass under varying culture conditions. Firstly, adequate cell numbers for reliable statistics were identified. Then, to characterize the performance and reproducibility of the method, we compared results from independently repeated measurements and quantified the cellular response to osmolality changes of the cell culture medium...
March 6, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28259901/proteomic-analysis-of-oridonin-induced-apoptosis-in-multiple-myeloma-cells
#11
Jing Zhao, Mei Zhang, Pengcheng He, Junjie Zhao, Ying Chen, Jun Qi, Yuan Wang
Oridonin is a diterpenoid compound isolated from the medicinal herb Rabdosia rubescens, and has shown marked antitumor effects against different types of cancer. However, the definitive systematic molecular mechanism underlying the antitumor activity of oridonin in multiple myeloma remains to be elucidated. In the present study, cell viability and cytotoxicity were examined to determine the appropriate concentration for proteomic investigation. In addition, cell apoptosis was evaluated using flow cytometry and transmission electron microscopy...
February 17, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28255355/hybrid-imaging-labels-providing-the-link-between-mass-spectrometry-based-molecular-pathology-and-theranostics
#12
Tessa Buckle, Steffen van der Wal, Stijn J M van Malderen, Larissa Müller, Joeri Kuil, Vincent van Unen, Ruud J B Peters, Margaretha E M van Bemmel, Liam A McDonnell, Aldrik H Velders, Frits Koning, Frank Vanhaeke, Fijs W B van Leeuwen
BACKGROUND: Development of theranostic concepts that include inductively coupled plasma mass spectrometry (ICP-MS) and laser ablation ICP-MS (LA-ICP-MS) imaging can be hindered by the lack of a direct comparison to more standardly used methods for in vitro and in vivo evaluation; e.g. fluorescence or nuclear medicine. In this study a bimodal (or rather, hybrid) tracer that contains both a fluorescent dye and a chelate was used to evaluate the existence of a direct link between mass spectrometry (MS) and in vitro and in vivo molecular imaging findings using fluorescence and radioisotopes...
2017: Theranostics
https://www.readbyqxmd.com/read/28246016/gut-specific-delivery-of-t-helper-17-cells-reduces-obesity-and-insulin-resistance-in-mice
#13
Chun-Pyo Hong, Areum Park, Bo-Gie Yang, Chang Ho Yun, Min-Jung Kwak, Gil-Woo Lee, Jung-Hwan Kim, Min Seong Jang, Eun-Jung Lee, Eun-Ji Jeun, Gihoon You, Kwang Soon Kim, Youngwoo Choi, Ji-Hwan Park, Daehee Hwang, Sin-Hyeog Im, Jihyun F Kim, Yoon-Keun Kim, Ju-Young Seoh, Charles D Surh, You-Me Kim, Myoung Ho Jang
BACKGROUND & AIMS: Obesity and metabolic syndrome have been associated with alterations to the intestinal microbiota. However, few studies examined the effects of obesity on the intestinal immune system. We investigated changes in subsets of intestinal CD4+ T-helper (Th) cells with obesity and the effects of gut-tropic Th17 cells in mice on a high-fat diet (HFD). METHODS: We isolated immune cells from small intestine and adipose tissue of C57BL/6 mice fed a normal chow diet or a HFD for 10 weeks and analyzed the cells by flow cytometry...
February 25, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28243322/targeting-metabolic-remodeling-in-triple-negative-breast-cancer-in-a-murine-model
#14
Verónica García-Castillo, Eduardo López-Urrutia, Octavio Villanueva-Sánchez, Miguel Á Ávila-Rodríguez, Alejandro Zentella-Dehesa, Carlo Cortés-González, César López-Camarillo, Nadia J Jacobo-Herrera, Carlos Pérez-Plasencia
Background: Chemotherapy is the backbone of systemic treatment for triple negative breast cancer (TNBC), which is one of the most relevant breast cancers molecular types due to the ability of tumor cells to develop drug resistance, highlighting the urgent need to design newer and safer drug combinations for treatment. In this context, to overcome tumor cell drug resistance, we employed a novel combinatorial treatment including Doxorubicin, Metformin, and Sodium Oxamate (DoxMetOx). Such pharmacological combination targets indispensable hallmarks of cancer-related to aerobic glycolysis and DNA synthesis...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28241839/caspase-vinyl-sulfone-small-molecule-inhibitors-prevent-axonal-degeneration-in-human-neurons-and-reverse-cognitive-impairment-in-caspase-6-overexpressing-mice
#15
Prateep Pakavathkumar, Anastasia Noël, Clotilde Lecrux, Agne Tubeleviciute-Aydin, Edith Hamel, Jan-Eric Ahlfors, Andrea C LeBlanc
BACKGROUND: The activation of the aspartate-specific cysteinyl protease, Caspase-6, is proposed as an early pathogenic event of Alzheimer disease (AD) and Huntington's disease. Caspase-6 inhibitors could be useful against these neurodegenerative diseases but most Caspase-6 inhibitors have been exclusively studied in vitro or show acute liver toxicity in humans. Here, we assessed vinyl sulfone small molecule peptide caspase inhibitors for potential use in vivo. METHODS: The IC50 of NWL vinyl sulfone small molecule caspase inhibitors were determined on Caspase-1 to 10, and Caspase-6-transfected human colon carcinoma HCT116 cells...
February 28, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/28240818/imaging-of-dense-cell-cultures-by-multiwavelength-lens-free-video-microscopy
#16
C Allier, S Morel, R Vincent, L Ghenim, F Navarro, M Menneteau, T Bordy, L Hervé, O Cioni, X Gidrol, Y Usson, J-M Dinten
They present results for lens-free microscopy for the imaging of dense cell culture. With this aim, they use a multiwavelength LED illumination with well separated wavelengths, together with the implementation of an appropriate holographic reconstruction algorithm. This allows for a fast and efficient reconstruction of the phase image of densely packed cells (up to 700 cells/mm(2) ) over a large field of view of 29.4 mm(2) . Combined with the compactness of the system which fits altogether inside an incubator, lens-free microscopy becomes a unique tool to monitor cell cultures over several days...
February 27, 2017: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/28231550/short-term-particulate-matter-exposure-induces-extracellular-vesicle-release-in-overweight-subjects
#17
Matteo Bonzini, Laura Pergoli, Laura Cantone, Mirjam Hoxha, Andrea Spinazzè, Luca Del Buono, Chiara Favero, Michele Carugno, Laura Angelici, Lucia Broggi, Andrea Cattaneo, Angela C Pesatori, Valentina Bollati
BACKGROUND: Extracellular vesicles (EVs) represent a plausible molecular mechanism linking particulate matter (PM) inhalation to its systemic effects. Microvesicles (MVs) are released from many cell types in response to various stimuli. Increased body mass index (BMI) could modify the response to PM exposure due to enhanced PM uptake and/or an underlying pro-oxidative state. We investigated the relationship between EV release and PM10/PM2.5 exposure in a cohort of 51 volunteers. Subjects were stratified based on their BMI to evaluate whether overweight BMI is a determinant of hypersusceptibility to PM effects...
February 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/28227050/distance-metric-learning-using-random-forest-for-cytometry-data
#18
M Baran Pouyan, J Birjandtalab, M Nourani, M Baran Pouyan, J Birjandtalab, M Nourani, M Baran Pouyan, J Birjandtalab, M Nourani
Visualization and clustering of single-cell mass cytometry (CyTOF) data are analytic techniques to identify different cell types. Most of such techniques, such as Euclidean norm, lose their effectiveness when the data dimension increases due to the curse of dimensionality. In this paper, we propose a new cell distance (called CytoRFD) that works based on Random Forest (RF) concept. The experimental results show that the proposed distance can achieve a much higher quality and effectiveness in large data analysis than traditional metrics specially for CyTOF data...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28217898/metal-induced-changes-in-trivalent-chromium-resistant-alcaligenes-faecalis-vitsim2
#19
Shiny C Matilda, Chittibabu Shanthi
The changes induced in bacterial strains under stress conditions provide an insight into metal resistance strategies. Trivalent chromium resistant bacterium were isolated and identified by 16S rRNA gene sequencing and designated as Alcaligenes faecalis VITSIM2. The growth pattern was monitored. The organism also showed resistance to copper, cadmium, and certain antibiotics. The differentially expressed proteins in SDS PAGE were identified by mass spectrometry as flagellin and 50S ribosomal L36 protein. The morphological changes were identified by scanning electron microscopy...
February 20, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28215986/the-%C3%AE-4galt1-affects-the-fibroblast-like-synoviocytes-invasion-in-rheumatoid-arthritis-by-modifying-n-linked-glycosylation-of-cxcr3
#20
Chi Sun, Xinhui Zhu, Tao Tao, Dongmei Zhang, Yi Wang, Hua Xu, Yunli Ren, Youhua Wang
OBJECTIVE: The level of β-1,4-galactosyltransferase 1 (β4GalT1) is up-regulated in collagen-induced arthritis (CIA) mice. It is reported that CXC chemokine receptor 3 (CXCR3) can enhance the invasiveness of fibroblast-like synoviocytes (FLS) in rheumatoid arthritis (RA). This study aims to investigate the specific mechanism of β4GalT1 and relationship between β4GalT1 and CXCR3 in RA. METHODS: The model of CIA mice was established to explore the role of β4GalT1...
February 10, 2017: European Journal of Cell Biology
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