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https://www.readbyqxmd.com/read/29453249/hhex-induces-promyelocyte-self-renewal-and-cooperates-with-growth-factor-independence-to-cause-myeloid-leukemia-in-mice
#1
Jacob T Jackson, Ashley P Ng, Benjamin J Shields, Sue Haupt, Ygal Haupt, Matthew P McCormack
The hematopoietically expressed homeobox (Hhex) transcription factor is overexpressed in human myeloid leukemias. Conditional knockout models of murine acute myeloid leukemia indicate that Hhex maintains leukemia stem cell self-renewal by enabling Polycomb-mediated epigenetic repression of the Cdkn2a tumor suppressor locus, encoding p16 Ink4a and p19 Arf However, whether Hhex overexpression also affects hematopoietic differentiation is unknown. To study this, we retrovirally overexpressed Hhex in hematopoietic progenitors...
February 27, 2018: Blood Advances
https://www.readbyqxmd.com/read/29453063/-1-h-nmr-based-metabolomics-reveals-interactive-effects-between-the-carrier-solvent-methanol-and-a-pharmaceutical-mixture-in-an-amphibian-developmental-bioassay-with-limnodynastes-peronii
#2
Steven D Melvin, Oliver A H Jones, Anthony R Carroll, Frederic D L Leusch
Organic carrier solvents are used in aquatic toxicity testing to improve chemical solubility and facilitate the exploration of dose-response relationships. Both water- and solvent-control groups are normally included in these scenarios to ensure that the solvent itself has no effect on the test organism, but this fails to consider possible interactive effects between carrier solvents and contaminants of interest. We explored this topic by exposing Limnodynastes peronii tadpoles to a mixture of common water-soluble pharmaceuticals (diclofenac, metformin and valproic acid) in the presence and absence of the carrier solvent methanol, according to standard developmental bioassay methodology...
February 10, 2018: Chemosphere
https://www.readbyqxmd.com/read/29452767/uptake-and-distribution-of-organo-iodine-in-deep-sea-corals
#3
Nancy G Prouty, E Brendan Roark, Leslye M Mohon, Ching-Chih Chang
Understanding iodine concentration, transport, and bioavailability is essential in evaluating iodine's impact to the environment and its effectiveness as an environmental biogeotracer. While iodine and its radionuclides have proven to be important tracers in geologic and biologic studies, little is known about transport of this element to the deep sea and subsequent uptake in deep-sea coral habitats. Results presented here on deep-sea black coral iodine speciation and iodine isotope variability provides key information on iodine behavior in natural and anthropogenic environments, and its geochemical pathway in the Gulf of Mexico...
February 13, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29449445/evaluation-of-penalized-likelihood-estimation-reconstruction-on-a-digital-time-of-flight-pet-ct-scanner-for-18-f-fdg-whole-body-examinations
#4
Elin Lindström, Anders Sundin, Carlos Trampal, Lars Lindsjö, Ezgi Ilan, Torsten Danfors, Gunnar Antoni, Jens Sörensen, Mark Lubberink
Resolution and quantitative accuracy of positron emission tomography (PET) are highly influenced by the reconstruction method. Penalized likelihood estimation algorithms allow for fully convergent iterative reconstruction, generating a higher image contrast while limiting noise compared to ordered subsets expectation maximization (OSEM). In this study, block-sequential regularized expectation maximization (BSREM) was compared to time-of-flight OSEM (TOF-OSEM). Various strengths of noise penalization factor β were tested along with scan durations and transaxial field of views (FOVs) with the aim to evaluate the performance and clinical use of BSREM for 18 F-FDG-PET-computed tomography (CT), both in quantitative terms and in a qualitative visual evaluation...
February 15, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29449040/xenon-adsorption-on-geological-media-and-implications-for-radionuclide-signatures
#5
M J Paul, S R Biegalski, D A Haas, H Jiang, H Daigle, J D Lowrey
The detection of radioactive noble gases is a primary technology for verifying compliance with the pending Comprehensive Nuclear-Test-Ban Treaty. A fundamental challenge in applying this technology for detecting underground nuclear explosions is estimating the timing and magnitude of the radionuclide signatures. While the primary mechanism for transport is advective transport, either through barometric pumping or thermally driven advection, diffusive transport in the surrounding matrix also plays a secondary role...
February 12, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29448973/camp-response-element-binding-protein-1-controls-porcine-ovarian-cell-proliferation-apoptosis-and-fsh-and-insulin-like-growth-factor-1-response
#6
A V Sirotkin, A Benčo, A Tandlmajerová, M Lauková, D Vašíček, J Laurinčik, J Kornhauser, S Alwasel, A H Harrath
The aim of the present study was to examine the role of cAMP response element-binding protein (CREB) and its phosphorylation in the regulation of ovarian cell proliferation and apoptosis, and of the response of proliferation and apoptosis to the upstream hormonal stimulators FSH and insulin-like growth factor (IGF) 1. In the first series of experiments, porcine ovarian granulosa cells, transfected or not with a gene construct encoding wild-type CREB1 (CREB1WT), were cultured with and without FSH (0, 1, 10 or 100ngmL-1)...
February 16, 2018: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/29448961/nuclear-receptor-agonist-driven-modification-of-inflammation-and-amyloid-pathology-enhances-and-sustains-cognitive-improvements-in-a-mouse-model-of-alzheimer-s-disease
#7
Brad T Casali, Erin G Reed-Geaghan, Gary E Landreth
BACKGROUND: Alzheimer's disease (AD) is a highly prevalent neurodegenerative disorder characterized by pathological hallmarks of beta-amyloid plaque deposits, tau pathology, inflammation, and cognitive decline. Treatment remains a clinical obstacle due to lack of effective therapeutics. Agonists targeting nuclear receptors, such as bexarotene, reversed cognitive deficits regardless of treatment duration and age in murine models of AD. While bexarotene demonstrated marked efficacy in decreasing plaque levels following short-term treatment, prolonged treatment did not modulate plaque burden...
February 15, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29448942/cold-exposure-induced-oxidative-stress-and-apoptosis-in-the-myocardium-by-inhibiting-the-nrf2-keap1-signaling-pathway
#8
Peifang Cong, Yunen Liu, Nannan Liu, Yubiao Zhang, Changci Tong, Lin Shi, Xuelei Liu, Xiuyun Shi, Ying Liu, Zhou Tong, Mingxiao Hou
BACKGROUND: Exposure to cold weather is associated with infaust cardiovascular responses, including myocardial infarction and arrhythmias. However, the exact mechanisms of these adverse changes in the myocardium under cold stress are unknown. This study was designed to investigate the mechanisms of cardiac injury induced by cold stress in mice. METHODS: The mice were randomly divided into three groups, normal control (no handling), 1-week cold stress and 2-week cold stress...
February 15, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29448133/exposure-to-the-rock-inhibitor-fasudil-promotes-gliogenesis-of-neural-stem-cells-in-vitro
#9
Zubair Ahmed Nizamudeen, Lisa Chakrabarti, Virginie Sottile
Fasudil is a clinically approved Rho-associated protein kinase (ROCK) inhibitor that has been used widely to treat cerebral consequences of subarachnoid hemorrhage. It is known to have a positive effect on animal models of neurological disorders including Parkinson's disease and stroke. However, its cellular effect on progenitor populations and differentiation is not clearly understood. While recent studies suggest that fasudil promotes the mobilization of neural stem cells (NSCs) from the subventricular zone in vivo and promotes the differentiation of the C17...
February 6, 2018: Stem Cell Research
https://www.readbyqxmd.com/read/29447580/hplc-pda-determination-of-carminic-acid-and-4-aminocarminic-acid-using-relative-molar-sensitivities-with-respect-to-caffeine
#10
Yuzo Nishizaki, Naoko Sato-Masumoto, Aki Yokota, Tsuyoshi Mikawa, Koichi Nakashima, Taichi Yamazaki, Miho Kuroe, Masahiko Numata, Toshihide Ihara, Yusai Ito, Naoki Sugimoto, Kyoko Sato
To accurately determine carminic acid (CA) and its derivative 4-aminocarminic acid (4-ACA), a novel, high-performance liquid chromatography with photodiode array detector (HPLC/PDA) method using relative molar sensitivity (RMS) was developed. The method requires no analytical standards of CA and 4-ACA; instead it uses the RMS values with respect to caffeine (CAF), which is used as an internal standard. An off-line combination of 1 H-quantitative nuclear magnetic resonance spectroscopy ( 1 H-qNMR) and HPLC/PDA was able to precisely determine the RMSs of CA 274nm /CAF 274nm and 4-ACA 274nm /CAF 274nm ...
February 15, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29447444/methodology-for-the-preparation-and-validation-of-plutonium-age-dating-materials
#11
Zsolt Varga, Adrian Nicholl, Jozsef Zsigrai, Maria Wallenius, Klaus Mayer
The present work describes a method for the preparation and validation of plutonium age dating reference materials. The test samples prepared in this context could be used to validate experimental protocols for determining the production date of plutonium via the 234 U/ 238 Pu, 235 U/ 239 Pu, 236 U/ 240 Pu and 241 Am/ 241 Pu chronometers. The starting material was prepared using reactor-grade plutonium, which was purified using a dedicated method to guarantee high Pu recovery, while maximizing U and Am separation efficiencies...
February 15, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29447200/discovery-of-two-new-species-of-crotalaria-leguminosae-crotalarieae-from-western-ghats-india
#12
Shabir A Rather, Shweta Subramaniam, Shagun Danda, Arun K Pandey
Two new species of Fabaceae-Papilionoideae are described and illustrated. Crotalaria suffruticosa from Karul Ghat region of Maharashtra is morphologically close to C. albida and C. epunctata. C. multibracteata from Panhala region of Maharashtra resembles C. vestita. C. suffruticosa differs from C. albida and C. epunctata in its habit, leaf, inflorescence, callosity, keel type, stigma, style morphology and number of seeds/pod. To test if the new species differ from their morphologically most similar species, we measured various traits and performed a Principal Component Analysis (PCA)...
2018: PloS One
https://www.readbyqxmd.com/read/29447178/joint-ancestry-and-association-test-indicate-two-distinct-pathogenic-pathways-involved-in-classical-dengue-fever-and-dengue-shock-syndrome
#13
Marisa Oliveira, Worachart Lert-Itthiporn, Bruno Cavadas, Verónica Fernandes, Ampaiwan Chuansumrit, Orlando Anunciação, Isabelle Casademont, Fanny Koeth, Marina Penova, Kanchana Tangnararatchakit, Chiea Chuen Khor, Richard Paul, Prida Malasit, Fumihiko Matsuda, Etienne Simon-Lorière, Prapat Suriyaphol, Luisa Pereira, Anavaj Sakuntabhai
Ethnic diversity has been long considered as one of the factors explaining why the severe forms of dengue are more prevalent in Southeast Asia than anywhere else. Here we take advantage of the admixed profile of Southeast Asians to perform coupled association-admixture analyses in Thai cohorts. For dengue shock syndrome (DSS), the significant haplotypes are located in genes coding for phospholipase C members (PLCB4 added to previously reported PLCE1), related to inflammation of blood vessels. For dengue fever (DF), we found evidence of significant association with CHST10, AHRR, PPP2R5E and GRIP1 genes, which participate in the xenobiotic metabolism signaling pathway...
February 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29447047/prospective-comparative-study-of-18-f-sodium-fluoride-pet-ct-and-planar-bone-scintigraphy-for-treatment-response-assessment-of-bone-metastases-in-patients-with-prostate-cancer
#14
Randi Fuglsang Fonager, Helle Damgaard Zacho, Niels Christian Langkilde, Joan Fledelius, June Anita Ejlersen, Helle Westergreen Hendel, Christian Haarmark, Mette Moe, Jesper Carl Mortensen, Mads Ryø Jochumsen, Lars Jelstrup Petersen
AIM: To compare 18 F-sodium fluoride positron emission tomography/computed tomography (NaF PET/CT) and 99m Tc-labelled diphosphonate bone scan (BS) for the monitoring of bone metastases in patients with prostate cancer undergoing anti-cancer treatment. MATERIAL AND METHODS: Data from 64 patients with prostate cancer were included. The patients received androgen-deprivation therapy (ADT), next-generation hormonal therapy (NGH) or chemotherapy. The patients had a baseline scan and 1-3 subsequent scans during six months of treatment...
February 15, 2018: Acta Oncologica
https://www.readbyqxmd.com/read/29446530/a-novel-tissue-based-%C3%A3-catenin-gene-and-immunohistochemical-analysis-to-exclude-familial-adenomatous-polyposis-among-children-with-hepatoblastoma-tumors
#15
Hendrikus J Dubbink, Iris H I M Hollink, Carolina Avenca Valente, Wenhui Wang, Pengyu Liu, Michail Doukas, Max M van Noesel, Winand N M Dinjens, Anja Wagner, Ron Smits
BACKGROUND: The Wnt/β-catenin pathway plays a central role in the pathogenesis of most hepatoblastomas (HBs), that is, up to 60-80% carry activating CTNNB1 mutations. HBs can however also be the first manifestation of familial adenomatous polyposis (FAP). As this is a severe disease, it is important for the patient and related family members to firmly exclude FAP at an early stage. Current diagnosis largely depends on APC germline mutation detection on genomic DNA, which is associated with 10-20% false-negative results...
February 15, 2018: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/29445176/thermally-conductive-and-mechanically-robust-graphene-nanoplatelet-reinforced-uo-2-composite-nuclear-fuels
#16
Tiankai Yao, Guoqing Xin, Spencer Michael Scott, Bowen Gong, Jie Lian
Low thermal transport behavior along the radial direction of nuclear fuel pellets and pellet-cladding mechanical interaction significantly impact fuel performance and the safety of current nuclear energy systems. Here we report a new strategy of advanced fuel design in which highly thermally-conductive and mechanically-robust graphene nanoplatelets are incorporated into UO 2 fuel matrix to improve fuel thermal-mechanical properties. The 2D geometry of the graphene nanoplatelets enables a unique lamellar structure upon fuel consolidation by spark plasma sintering...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29444128/molecular-action-of-isoflavone-genistein-in-the-human-epithelial-cell-line-hacat
#17
Elwira Smolińska, Marta Moskot, Joanna Jakóbkiewicz-Banecka, Grzegorz Węgrzyn, Bogdan Banecki, Aneta Szczerkowska-Dobosz, Dorota Purzycka-Bohdan, Magdalena Gabig-Cimińska
Due to its strong proliferation-reducing effects on keratinocytes, and also anti-inflammatory properties, the isoflavone genistein has already been proposed as a possible antipsoriatic compound. As there is still no detailed information on this topic, we examined the effects of genistein by using an in vitro model of both, normal and "psoriasis-like" keratinocytes at this stage of our work exhaustively testing the selected flavonoid in a mono-treated experimental design. Gene expression studies revealed transcriptional changes that confirms known disease-associated pathways and highlights many psoriasis-related genes...
2018: PloS One
https://www.readbyqxmd.com/read/29442133/follicle-stimulating-hormone-enhances-hepatic-gluconeogenesis-by-grk2-mediated-ampk-hyperphosphorylation-at-ser485-in-mice
#18
Xiaoyi Qi, Yanjing Guo, Yongfeng Song, Chunxiao Yu, Lifang Zhao, Li Fang, Dehuan Kong, Jiajun Zhao, Ling Gao
AIMS/HYPOTHESIS: Increased serum follicle-stimulating hormone (FSH) is correlated with fasting hyperglycaemia. However, the underlying mechanism remains unclear. Because excessive hepatic gluconeogenesis is a major cause of fasting hyperglycaemia the present study investigated whether FSH increases hepatic gluconeogenesis in mice. METHODS: Ovariectomised mice supplemented with oestradiol (E2) to maintain normal levels of serum E2 (OVX+E2 mice) were injected with low or high doses of FSH...
February 13, 2018: Diabetologia
https://www.readbyqxmd.com/read/29440653/genetic-and-morphological-support-for-possible-sympatric-origin-of-fish-from-subterranean-habitats
#19
Iraj Hashemzadeh Segherloo, Eric Normandeau, Laura Benestan, Clément Rougeux, Guillaume Coté, Jean-Sébastien Moore, NabiAllah Ghaedrahmati, Asghar Abdoli, Louis Bernatchez
Two blind Iran cave barbs, Garra typhlops and Garra lorestanensis, exist in sympatry in a single subterranean habitat, raising the hypothesis that they may represent a case of sympatric speciation following a colonization event. Their different mental disc forms have prompted some authors to propose the alternative hypothesis of two separate colonization events. In this study, we analysed a genome-wide panel of 11,257 SNPs genotyped by means of genotyping-by-sequencing combined with mitochondrial cytochrome c oxidase sub-unit I sequence data, field observations and morphological traits to test these two hypotheses...
February 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29440490/nuclear-quantum-effect-with-pure-anharmonicity-and-the-anomalous-thermal-expansion-of-silicon
#20
D S Kim, O Hellman, J Herriman, H L Smith, J Y Y Lin, N Shulumba, J L Niedziela, C W Li, D L Abernathy, B Fultz
Despite the widespread use of silicon in modern technology, its peculiar thermal expansion is not well understood. Adapting harmonic phonons to the specific volume at temperature, the quasiharmonic approximation, has become accepted for simulating the thermal expansion, but has given ambiguous interpretations for microscopic mechanisms. To test atomistic mechanisms, we performed inelastic neutron scattering experiments from 100 K to 1,500 K on a single crystal of silicon to measure the changes in phonon frequencies...
February 13, 2018: Proceedings of the National Academy of Sciences of the United States of America
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