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https://www.readbyqxmd.com/read/28231326/expression-of-glyoxalase-i-is-reduced-in-cirrhotic-livers-a-possible-mechanism-in-the-development-of-cirrhosis
#1
Marcus Hollenbach, Antje Thonig, Sabine Pohl, Cristina Ripoll, Maurice Michel, Alexander Zipprich
BACKGROUND: High concentrations of methylglyoxal (MGO) cause cytotoxiticy via formation of advanced glycation endproducts (AGEs) and inflammation. MGO is detoxificated enzymatically by glyoxalase-I (Glo-I). The aim of this study was to analyze the role of Glo-I during the development of cirrhosis. METHODS: In primary hepatocytes, hepatic stellate cells (pHSC) and sinusoidal endothelial cells (pLSEC) from rats with early (CCl4 8wk) and advanced cirrhosis (CCl4 12wk) expression and activity of Glo-I were determined and compared to control...
2017: PloS One
https://www.readbyqxmd.com/read/28231025/rabit-ii-implementation-of-a-high-throughput-micronucleus-biodosimetry-assay-on-commercial-biotech-robotic-systems
#2
Mikhail Repin, Sergey Pampou, Charles Karan, David J Brenner, Guy Garty
We demonstrate the use of high-throughput biodosimetry platforms based on commercial high-throughput/high-content screening robotic systems. The cytokinesis-block micronucleus (CBMN) assay, using only 20 μl whole blood from a fingerstick, was implemented on a PerkinElmer cell::explorer and General Electric IN Cell Analyzer 2000. On average 500 binucleated cells per sample were detected by our FluorQuantMN software. A calibration curve was generated in the radiation dose range up to 5.0 Gy using the data from 8 donors and 48,083 binucleated cells in total...
February 23, 2017: Radiation Research
https://www.readbyqxmd.com/read/28230817/common%C3%A2-chemical%C3%A2-inductors%C3%A2-of%C3%A2-replication%C3%A2-stress-%C3%A2-focus%C3%A2-on%C3%A2-cell-based%C3%A2-studies
#3
REVIEW
Eva Vesela, Katarina Chroma, Zsofia Turi, Martin Mistrik
DNA replication is a highly demanding process regarding the energy and material supply and must be precisely regulated, involving multiple cellular feedbacks. The slowing down or stalling of DNA synthesis and/or replication forks is referred to as replication stress (RS). Owing to the complexity and requirements of replication, a plethora of factors may interfere and challenge the genome stability, cell survival or affect the whole organism. This review outlines chemical compounds that are known inducers of RS and commonly used in laboratory research...
February 21, 2017: Biomolecules
https://www.readbyqxmd.com/read/28230643/mtor-inhibition-clinical-transplantation-pancreas-islet
#4
Thierry Berney, Axel Andres, Christian Toso, Pietro Majno, Jean-Paul Squifflet
This brief overview discusses the beneficial and deleterious effects of mTOR inhibitors on beta-cells, and how sirolimus- and everolimus-based immunosuppression have impacted on practices and outcomes of pancreas and islet transplantation. Sirolimus was the cornerstone of immunosuppressive regimens in islet transplantation at the turn of the millenium, but utilization of mTOR inhibitors has progressively decreased from >80% to <50% of islet transplant recipients in more recent years. For whole pancreas transplantation, mTOR inhibitors were used in approximately 20% of patients in the early 2000s, but this dropped over the years to <10% currently...
February 23, 2017: Transplantation
https://www.readbyqxmd.com/read/28230570/refractory-pure-red-cell-aplasia-manifesting-as-deficiency-of-adenosine-deaminase-2
#5
Hasan Hashem, Rachel Egler, Jignesh Dalal
Primary progress has been made in the last 2 years, particularly in finding novel disease-causing genes for a number of autoinflammatory diseases and primary immunodeficiencies. Whole-exome sequencing has dramatically increased the pace at which causative genes are being discovered. CECR1 (Cat eye syndrome chromosome region, candidate 1) gene encodes adenosine deaminase 2 (ADA2) protein. Patients who carry CECR1 mutation(s) suffer from deficiency of ADA2 (DADA2). Here, we describe a patient with pure red cell aplasia discovered to have DADA2...
February 22, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28230208/optogenetic-activation-of-vglut2-expressing-excitatory-neurons-blocks-epileptic-seizure-like-activity-in-the-mouse-entorhinal-cortex
#6
Latefa Yekhlef, Gian Luca Breschi, Stefano Taverna
We investigated whether an anti-epileptic effect is obtained by selectively activating excitatory neurons expressing ChR2 under the promoter for the synaptic vesicular glutamate transporter 2 (VGLUT2). VGLUT2-expressing cells were optically stimulated while local field potential and whole-cell patch-clamp recordings were performed in mouse entorhinal cortical slices perfused with the proconvulsive compound 4-aminopyridine (4-AP). In control conditions, blue light flashes directly depolarized the majority of putative glutamatergic cells, which in turn synaptically excited GABAergic interneurons...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230188/3d-time-lapse-imaging-and-quantification-of-mitochondrial-dynamics
#7
Miguel Sison, Sabyasachi Chakrabortty, Jérôme Extermann, Amir Nahas, Paul James Marchand, Antonio Lopez, Tanja Weil, Theo Lasser
We present a 3D time-lapse imaging method for monitoring mitochondrial dynamics in living HeLa cells based on photothermal optical coherence microscopy and using novel surface functionalization of gold nanoparticles. The biocompatible protein-based biopolymer coating contains multiple functional groups which impart better cellular uptake and mitochondria targeting efficiency. The high stability of the gold nanoparticles allows continuous imaging over an extended time up to 3000 seconds without significant cell damage...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230171/impact-of-genetic-variation-on-human-camkk2-regulation-by-ca-2-calmodulin-and-multisite-phosphorylation
#8
Matthew T O'Brien, Jonathan S Oakhill, Naomi X Y Ling, Christopher G Langendorf, Ashfaqul Hoque, Toby A Dite, Anthony R Means, Bruce E Kemp, John W Scott
The Ca(2+)-calmodulin dependent protein kinase kinase-2 (CaMKK2) is a key regulator of neuronal function and whole-body energy metabolism. Elevated CaMKK2 activity is strongly associated with prostate and hepatic cancers, whereas reduced CaMKK2 activity has been linked to schizophrenia and bipolar disease in humans. Here we report the functional effects of nine rare-variant point mutations that were detected in large-scale human genetic studies and cancer tissues, all of which occur close to two regulatory phosphorylation sites and the catalytic site on human CaMKK2...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230102/identification-of-a-new-virulent-clade-in-enterohemorrhagic-escherichia-coli-o26-h11-h-sequence-type-29
#9
Nozomi Ishijima, Ken-Ichi Lee, Tomomi Kuwahara, Haruyuki Nakayama-Imaohji, Saori Yoneda, Atsushi Iguchi, Yoshitoshi Ogura, Tetsuya Hayashi, Makoto Ohnishi, Sunao Iyoda
Enterohemorrhagic Escherichia coli (EHEC) O26 infections cause severe human diseases such as hemolytic uremic syndrome and encephalopathy, and is the predominant serogroup among non-O157 EHEC in many countries. Shiga toxin (Stx), which consists of two distinct types (Stx1 and Stx2), plays a central role in EHEC pathogenesis. The major stx gene type in EHEC O26 strains is stx1, although isolates with only stx2 have emerged in Japan since 2012 and have been reported in Europe. In this study, we selected 27 EHEC O26 strains isolated in Japan and identified a distinct genetic clade within sequence type (ST) 29, designated ST29C1, that carried only stx2 and had the plasmid gene profile ehxA+/katP-/espP+/etpD-...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229920/in-vitro-wound-healing-and-cytotoxic-activity-of-the-gel-and-whole-leaf-materials-from-selected-aloe-species
#10
Lizelle T Fox, Anisha Mazumder, Anupma Dwivedi, Minja Gerber, Jeanetta du Plessis, Josias H Hamman
ETHNOPHARMACOLOGICAL RELEVANCE: Aloe vera is one of the most important medicinal plants in the world with applications in the cosmetic industry and also in the tonic or health drink product market. Different parts of Aloe ferox and Aloe marlothii are used as traditional medicines for different applications. Although wound healing has been shown for certain aloe gel materials (e.g. A. vera) previously, there are conflicting reports on this medicinal application of aloe leaf gel materials...
February 13, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28229403/a-simple-protocol-to-isolate-characterize-and-expand-dental-pulp-stem-cells
#11
Federica Di Scipio, Andrea Elio Sprio, Maria Elisabetta Carere, Zhiqian Yang, Giovanni Nicolao Berta
Adult stem cells reside in body tissues to preserve organs and whole organism homeostasis. They are acquiring a prominent role in the contemporary medicine. Many protocols to isolate and cultivate adult stem cells have been so far described, though they are often lengthy, laborious, and require very expansive instruments, materials, and reagents. On this basis, we describe a simple, cheap but at the same time functional method to: (1) isolate dental pulp stem cells (DPSC), (2) expand and cultivate DPSC, (3) cryopreserve DPSC, (4) characterize DPSC, and (5) differentiate DPSC into both mesenchymal and non-mesenchymal lineages...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229354/genetic-differentiation-of-colombian-populations-of-anopheles-darlingi-root-diptera-culicidae
#12
C Y Rosero, G I Jaramillo, R Gonzalez, H Cardenas
Anopheles darlingi Root is a primary vector of malaria in the neotropic region, a species not just highly anthropophilic but very efficient in transmitting Plasmodium species and considered the most important vector in the Amazon region. The main goal of this study was to determine the genetic structure of the A. darlingi populations using microsatellites (STR) in western and eastern regions of Colombia. DNA extraction was done with the cited protocol of band using the Genomic Prep™ cell and tissue isolation commercial kits...
February 23, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28229287/role-of-neurochemicals-in-the-interaction-between-the-microbiota-and-the-immune-and-the-nervous-system-of-the-host-organism
#13
Alexander V Oleskin, Boris A Shenderov, Vladimir S Rogovsky
This work is concerned with the role of evolutionary conserved substances, neurotransmitters, and neurohormones, within the complex framework of the microbial consortium-immune system-nervous system axis in the human or animal organism. Although the operation of each of these systems per se is relatively well understood, their combined effects on the host organism still await further research. Drawing on recent research on host-produced and microbial low-molecular-weight neurochemicals such as biogenic amines, amino acids, and short-chain fatty acids (SCFAs), we suggest that these mediators form a part of a universal neurochemical "language...
February 22, 2017: Probiotics and Antimicrobial Proteins
https://www.readbyqxmd.com/read/28229152/an-anionic-metal-organic-framework-with-ternary-building-units-for-rapid-and-selective-adsorption-of-dyes
#14
Shuo Yao, Tong Xu, Nian Zhao, Lirong Zhang, Qisheng Huo, Yunling Liu
A novel metal-organic framework, [(CH3)2NH2]2[Cu3O(SO4)3Cu2L2(DMF)(H2O)]·9DMF (JLU-Liu39) H2L = pyridine-3,5-bis(phenyl-4-carboxylic acid), has been successfully synthesized under solvothermal conditions. Structure analysis indicates that the framework of JLU-Liu39 is constructed by ternary building units which include a rare hexa-nuclear [Cu6O2(SO4)6] cluster, a classical [Cu2(CO2)4] paddlewheel, and a 3-connected hetero-N, O donor ligand. The whole 3D framework possesses a (3,4,4)-connected fjh topology and a large window size of 25...
February 23, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28229117/dna-methylation-data-for-identification-of-epigenetic-targets-of-resveratrol-in-triple-negative-breast-cancer-cells
#15
Rubiceli Medina-Aguilar, Carlos Pérez-Plasencia, Patricio Gariglio, Laurence A Marchat, Ali Flores-Pérez, César López-Camarillo, Jaime García Mena
Previous studies revealed that some bioactive food components have anti-cancer effects. However epigenetic effects of dietary compound resveratrol are largely unknown in breast cancer cells (M.A. Dawson, T. Kouzarides, 2012) [1]. Here we provide novel data and comparisons of DNA methylation status of promoter gene regions in response to resveratrol treatment at 24 h and 48 h versus untreated MDA-MB-231 breast cancer cells. DNA methylation changes were measured using Array-PRIMES method (aPRIMES) followed by whole-genome hybridization using human DNA methylation promoter microarray NimbleGen HG18 Refseq Promoter 3×720 K array...
April 2017: Data in Brief
https://www.readbyqxmd.com/read/28228749/neuroprotective-role-of-the-pi3-kinase-akt-signaling-pathway-in-zebrafish
#16
Shuang Chen, Yunzhang Liu, Xiaozhi Rong, Yun Li, Jianfeng Zhou, Ling Lu
Neuronal survival and growth in the embryo is controlled partly by trophic factors. For most trophic factors (such as Insulin-like growth factor-1), the ability to regulate cell survival has been attributed to the phosphoinositide 3-kinase (PI3K)/Akt kinase cascade. This study presents data illustrating the role of PI3K/Akt in attainment of normal brain size during zebrafish embryogenesis. Blocking PI3K with inhibitor LY294002 caused a significant reduction in brain size (in addition to global growth retardation) during zebrafish embryogenesis...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28228587/prophylactic-herpes-simplex-virus-2-hsv-2-vaccines-adjuvanted-with-stable-emulsion-and-toll-like-receptor-9-agonist-induce-a-robust-hsv-2-specific-cell-mediated-immune-response-protect-against-symptomatic-disease-and-reduce-the-latent-viral-reservoir
#17
Michael T Hensel, Jason D Marshall, Michael R Dorwart, Darren S Heeke, Eileen Rao, Padmaja Tummala, Li Yu, Gary H Cohen, Roselyn J Eisenberg, Derek D Sloan
Several prophylactic vaccines targeting HSV-2 have failed in the clinic to demonstrate a sustained depression in viral shedding or protection from recurrences. Although these vaccines have generated high titers of neutralizing antibodies, their induction of robust CD8 T cells has largely been unreported, even though evidence for the importance of HSV-2 antigen-specific CD8 T cells is mounting in animal models and in translational studies involving subjects with active HSV-2-specific immune responses. We developed a subunit vaccine composed of the neutralizing antibody (nAb) targets gD and gB, the novel T cell antigen and tegument protein UL40, and we compared this to a whole-inactivated virus vaccine (FI-HSV-2)...
February 22, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28228537/morphoelasticity-in-the-development-of-brown-alga-ectocarpus-siliculosus-from-cell-rounding-to-branching
#18
Fei Jia, Martine Ben Amar, Bernard Billoud, Bénédicte Charrier
A biomechanical model is proposed for the growth of the brown alga Ectocarpus siliculosus Featuring ramified uniseriate filaments, this alga has two modes of growth: apical growth and intercalary growth with branching. Apical growth occurs upon the mitosis of a young cell at one extremity and leads to a new tip cell followed by a cylindrical cell, whereas branching mainly occurs when a cylindrical cell becomes rounded and swells, forming a spherical cell. Given the continuous interplay between cell growth and swelling, a poroelastic model combining osmotic pressure and volumetric growth is considered for the whole cell, cytoplasm and cell wall...
February 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28228489/age-dependent-shift-in-macrophage-polarisation-causes-inflammation-mediated-degeneration-of-enteric-nervous-system
#19
Laren Becker, Linh Nguyen, Jaspreet Gill, Subhash Kulkarni, Pankaj Jay Pasricha, Aida Habtezion
OBJECTIVE: The enteric nervous system (ENS) undergoes neuronal loss and degenerative changes with age. The cause of this neurodegeneration is poorly understood. Muscularis macrophages residing in close proximity to enteric ganglia maintain neuromuscular function via direct crosstalk with enteric neurons and have been implicated in the pathogenesis of GI motility disorders like gastroparesis and postoperative ileus. The aim of this study was to assess whether ageing causes alterations in macrophage phenotype that contributes to age-related degeneration of the ENS...
February 21, 2017: Gut
https://www.readbyqxmd.com/read/28228349/identification-of-prdm-genes-in-human-corneal-endothelium
#20
Kostadin Rolev, G O'Donovan Dominic, Christiana Georgiou, Rajan Madhavan, Alexandra Chittka
Corneal endothelial cells (CECs) are essential for maintaining corneal stromal hydration and ensuring its transparency, which is necessary for normal vision. Dysfunction of CECs leads to stromal decompensation, loss of transparency and corneal blindness. Corneal endothelium has low proliferative potential compared to surface epithelial cells leading to poor regeneration of CEC following injury or age related decline in cellular density. The mechanisms which control proliferation and differentiation of neural crest derived CEC progenitors are yet to be clearly elucidated...
February 19, 2017: Experimental Eye Research
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