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https://www.readbyqxmd.com/read/28445466/human-pluripotent-stem-cells-recurrently-acquire-and-expand-dominant-negative-p53-mutations
#1
Florian T Merkle, Sulagna Ghosh, Nolan Kamitaki, Jana Mitchell, Yishai Avior, Curtis Mello, Seva Kashin, Shila Mekhoubad, Dusko Ilic, Maura Charlton, Genevieve Saphier, Robert E Handsaker, Giulio Genovese, Shiran Bar, Nissim Benvenisty, Steven A McCarroll, Kevin Eggan
Human pluripotent stem cells (hPS cells) can self-renew indefinitely, making them an attractive source for regenerative therapies. This expansion potential has been linked with the acquisition of large copy number variants that provide mutated cells with a growth advantage in culture. The nature, extent and functional effects of other acquired genome sequence mutations in cultured hPS cells are not known. Here we sequence the protein-coding genes (exomes) of 140 independent human embryonic stem cell (hES cell) lines, including 26 lines prepared for potential clinical use...
April 26, 2017: Nature
https://www.readbyqxmd.com/read/28442728/hybrid-energy-storage-of-ni-oh-2-coated-n-doped-graphene-aerogel-n-doped-graphene-aerogel-for-the-replacement-of-nicd-and-nimh-batteries
#2
Pichamon Sirisinudomkit, Pawin Iamprasertkun, Atiweena Krittayavathananon, Tanut Pettong, Peerapan Dittanet, Montree Sawangphruk
Although Nickel-Cadmium (NiCd) and Nickel-metal hydride (NiMH) batteries have been widely used, their drawbacks including toxic Cd and expensive La alloy at the negative electrodes, low energy density (40-60 Wh/kg for NiCd and 140-300 Wh/L for NiMH), low power density (150 W/kg for NiCd and 1000 W/kg for NiMH), and low working potential (1.2 V) limit their applications. In this work, Cd and La alloy were replaced with N-doped reduced graphene oxide aerogel (N-rGOae) providing a hybrid energy storage (HES) having the battery and supercapacitor effects...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28439677/ap-2%C3%AE-reverses-vincristine-induced-multidrug-resistance-of-sgc7901-gastric-cancer-cells-by-inhibiting-the-notch-pathway
#3
Wei Lian, Li Zhang, Long Yang, Wensheng Chen
Multidrug resistance (MDR) remains a major clinical obstacle in the treatment of gastric cancer (GC) since it causes tumor recurrence and metastasis. The transcription factor activator protein-2α (AP-2α) has been implicated in drug-resistance in breast cancer; however, its effects on MDR of gastric cancer are far from understood. In this study, we aimed to explore the effects of AP-2α on the MDR in gastric cancer cells selected by vincristine (VCR). Decreased AP-2α levels were markedly detected by RT-PCR and Western blot in gastric cancer cell lines (BGC-823, SGC-7901, AGS, MKN-45) compared with that in the gastric epithelial cell line (GES-1)...
April 24, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28439440/a-comparison-of-the-effects-of-20-mannitol-and-3-nacl-on-coagulation-parameters-in-vitro-using-rotem-a-prospective-randomized-crossover-study
#4
Achmet Ali, Bilge Şencan, Pulat Akın Sabancı, Demet Altun, Aylin Tetik, Lerzan Recep Doğan, İbrahim Özkan Akıncı
OBJECTIVE: The aim of the present study is to compare the effect of 20% mannitol and 3% NaCl on blood coagulation in vitro using rotational thromboelastometry (ROTEM). METHODS: Twenty-millilitre blood samples were obtained from 15 volunteers. In each group, 2 mL blood samples were collected into both polypropylene tubes and EDTA tubes for ROTEM and hemogram analysis. After sampling, blood samples were diluted with test solutions. Group C (control): Only blood, Group M (mannitol): 7% vol 20% mannitol concentration in the blood, Group hypertonic saline (HS): 7% vol 3% hypertonic saline (NaCl) in the blood, Group M/H (mannitol and hydroxyethyl starch solutions [HES]): 6% vol 20% mannitol concentration and 8% vol HES in the blood and Group HS/H (hypertonic saline and HES): 6% vol 3% hypertonic saline concentration and 8% vol HES in the blood...
April 2017: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/28436940/disruption-of-spatiotemporal-hypoxic-signaling-causes-congenital-heart-disease-in-mice
#5
Xuejun Yuan, Hui Qi, Xiang Li, Fan Wu, Jian Fang, Eva Bober, Gergana Dobreva, Yonggang Zhou, Thomas Braun
Congenital heart disease (CHD) represents the most prevalent inborn anomaly. Only a minority of CHD cases are attributed to genetic causes, suggesting a major role of environmental factors. Nonphysiological hypoxia during early pregnancy induces CHD, but the underlying reasons are unknown. Here, we have demonstrated that cells in the mouse heart tube are hypoxic, while cardiac progenitor cells (CPCs) expressing islet 1 (ISL1) in the secondary heart field (SHF) are normoxic. In ISL1+ CPCs, induction of hypoxic responses caused CHD by repressing Isl1 and activating NK2 homeobox 5 (Nkx2...
April 24, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28431209/drug-delivery-systems-based-on-hydroxyethyl-starch
#6
Constantinos M Paleos, Zili Sideratou, Dimitris Tsiourvas
Τhe advantageous biological properties of hydroxyethyl starch (HES) triggered research interest towards design and synthesis of Drug Delivery Systems (DDSs) based on this polysaccharide. Convenient reaction schemes, including one-step reactions, led to the synthesis of HES conjugates with selected anticancer molecules or therapeutic proteins. Nanocapsules and hydrogels based on HES were also prepared and studied as prospective drug delivery systems. Formulations originating from these drug conjugates and also from nanocapsules and hydrogels loaded with drugs were characterized, highlighting on the extension of their half-life in plasma which is a critical property as far as their efficacy is concerned...
April 21, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28424305/numerical-simulation-of-haemodynamics-and-low-density-lipoprotein-transport-in-the-rabbit-aorta-and-their-correlation-with-atherosclerotic-plaque-thickness
#7
Xiaoyin Li, Xiao Liu, Peng Zhang, Chenglong Feng, Anqiang Sun, Hongyan Kang, Xiaoyan Deng, Yubo Fan
Two mechanisms of shear stress and mass transport have been recognized to play an important role in the development of localized atherosclerosis. However, their relationship and roles in atherogenesis are still obscure. It is necessary to investigate quantitatively the correlation among low-density lipoproteins (LDL) transport, haemodynamic parameters and plaque thickness. We simulated blood flow and LDL transport in rabbit aorta using computational fluid dynamics and evaluated plaque thickness in the aorta of a high-fat-diet rabbit...
April 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28420872/hairy-enhancer-of-split-homologue-1-suppresses-vascular-endothelial-growth-factor-induced-angiogenesis-via-downregulation-of-osteopontin-expression
#8
Xing-Xing Yao, Jing-Bo Lu, Zhi-Dong Ye, Lei Zheng, Qian Wang, Zhi-Qi Lin, Hao Liu, Heng Wan, Fang-Yong Fu, Xian-Ying Huang, Jian-Chen Xiu, Zheng-Jun Liu, Yan-Wei Hu
Angiogenesis plays a critical role in the progression and vulnerability of atherosclerotic plaques; however, the orchestration of angiogenesis in atherosclerotic plaque formation remains unclear. The results of microarray analysis, real-time PCR and immunohistochemical analyses showed that Hairy/enhancer of split homologue-1 (Hes-1) expression was significantly decreased, while that of osteopontin (OPN) was increased, in atherosclerotic plaques. Meanwhile, immunofluorescence results demonstrated that both Hes-1 and OPN were expressed in endothelial cells (ECs) of neovessels in atherosclerotic plaques...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28419299/pregnancy-and-labor-complications-in-female-survivors-of-childhood-cancer-the-british-childhood-cancer-survivor-study
#9
Raoul C Reulen, Chloe J Bright, David L Winter, Miranda M Fidler, Kwok Wong, Joyeeta Guha, Julie S Kelly, Clare Frobisher, Angela B Edgar, Roderick Skinner, W Hamish B Wallace, Mike M Hawkins
Background: Female survivors of childhood cancer treated with abdominal radiotherapy who manage to conceive are at risk of delivering premature and low-birthweight offspring, but little is known about whether abdominal radiotherapy may also be associated with additional complications during pregnancy and labor. We investigated the risk of developing pregnancy and labor complications among female survivors of childhood cancer in the British Childhood Cancer Survivor Study (BCCSS). Methods: Pregnancy and labor complications were identified by linking the BCCSS cohort (n = 17 980) to the Hospital Episode Statistics (HES) for England...
November 1, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/28417443/time-trends-of-high-blood-pressure-prevalence-awareness-and-control-in-the-italian-general-population-surveys-of-the-national-institute-of-health
#10
Anna Di Lonardo, Chiara Donfrancesco, Luigi Palmieri, Diego Vanuzzo, Simona Giampaoli
INTRODUCTION: High blood pressure (BP) is a major risk factor for cardiovascular disease. The urgency of the problem was underlined by the World Health Organization (WHO) Global Action Plan for the prevention and control of noncommunicable diseases, which recommends a 25% relative reduction in the prevalence of raised BP by 2020. A surveillance system represents a useful tool to monitor BP in the general population. Since 1980s, the National Institute of Health has conducted several surveys of the adult general population, measuring cardiovascular risk factors by standardized procedures and methods...
April 17, 2017: High Blood Pressure & Cardiovascular Prevention: the Official Journal of the Italian Society of Hypertension
https://www.readbyqxmd.com/read/28414922/three-new-active-members-of-the-i-onui-family-of-homing-endonucleases
#11
Iman M Bilto, Tuhin Kumar Guha, Alvan Wai, Georg Hausner
In vitro characterization of three LAGLIDADG-type homing endonucleases (I-CcaI, I-CcaII and I-AstI) that belong to the I-OnuI family showed that they are functional homing endonucleases that cleave their respective cognate target sites. These endonucleases are encoded within group ID introns and appear to be orthologs that have inserted into three different mitochondrial genes, rns, rnl and cox3, respectively. The endonuclease activity of I-CcaI was tested using various substrates and its minimum DNA recognition sequence was estimated to be 26 nt...
April 17, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28407073/uptake-sequestration-and-tolerance-of-cadmium-at-cellular-levels-in-the-hyperaccumulator-plant-species-sedum-alfredii
#12
Shengke Tian, Ruohan Xie, Haixin Wang, Yan Hu, Dandi Hou, Xingcheng Liao, Patrick H Brown, Hongxia Yang, Xianyong Lin, John M Labavitch, Lingli Lu
Sedum alfredii is one of a few plant species known to hyperaccumulate cadmium (Cd). Uptake, localization, and tolerance of Cd at cellular levels in shoots were compared in hyperaccumulating (HE) and non-hyperaccumulating (NHE) ecotypes of Sedum alfredii. X-ray fluorescence images of Cd in stems and leaves showed only a slight Cd signal restricted within vascular bundles in the NHEs, while enhanced localization of Cd, with significant tissue- and age-dependent variations, was detected in HEs. In contrast to the vascular-enriched Cd in young stems, parenchyma cells in leaf mesophyll, stem pith and cortex tissues served as terminal storage sites for Cd sequestration in HEs...
April 12, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28405105/hesperidin-as-radioprotector-against-radiation-induced-lung-damage-in-rat-a-histopathological-study
#13
Gholam Hassan Haddadi, Abolhasan Rezaeyan, Mohammad Amin Mosleh-Shirazi, Massood Hosseinzadeh, Reza Fardid, Masoud Najafi, Ashkan Salajegheh
Reactive oxygen species (ROS) are generated by ionizing radiation, and one of the organs commonly affected by ROS is the lung. Radiation-induced lung injury including pneumonia and lung fibrosis is a dose-limiting factor in radiotherapy (RT) of patients with thorax irradiation. Administration of antioxidants has been proved to protect against ROS. The present study was aimed to assess the protective effect of hesperidin (HES) against radiation-induced lung injury of male rats. Fifty rats were divided into three groups...
January 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28396935/state-of-the-art-in-fluid-and-volume-therapy-a%C3%A2-user-friendly-staged-concept-english-version
#14
M Rehm, N Hulde, T Kammerer, A S Meidert, K Hofmann-Kiefer
Adequate intraoperative infusion therapy is essential for the perioperative outcome of a patient. Both hypo- and hypervolemia can lead to an increased rate of perioperative complications and to a worse outcome. Perioperative infusion therapy should therefore be needs-based. The primary objective is the maintenance of preoperative normovolemia using a rational infusion strategy. Perioperative fluid losses should be differentiated from volume losses due to surgical bleeding or protein losses into the interstitial space...
April 10, 2017: Der Anaesthesist
https://www.readbyqxmd.com/read/28396367/lyme-disease-and-bell-s-palsy-an-epidemiological-study-of-diagnosis-and-risk-in-england
#15
Lilli Cooper, Michael Branagan-Harris, Richard Tuson, Charles Nduka
BACKGROUND: Lyme disease is caused by a tick-borne spirochaete of the Borrelia species. It is associated with facial palsy, is increasingly common in England, and may be misdiagnosed as Bell's palsy.Aim To produce an accurate map of Lyme disease diagnosis in England and to identify patients at risk of developing associated facial nerve palsy, to enable prevention, early diagnosis, and effective treatment.Design and setting Hospital episode statistics (HES) data in England from the Health and Social Care Information Centre were interrogated from April 2011 to March 2015 for International Classification of Diseases 10th revision (ICD-10) codes A69...
April 10, 2017: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/28386145/significance-of-stat3-signaling-in-epithelial-cell-differentiation-of-fetal-mouse-lungs
#16
Hiroki Kameyama, Shinji Kudoh, Jun Hatakeyama, Akira Matuo, Takaaki Ito
To study the significance of signal transducer and activator of transcription (Stat) 3 in lung epithelial development of fetal mice, we examined fetal mouse lungs, focusing on the expression of Clara cell secretory protein (CCSP), Forkhead box protein J1 (Foxj1), calcitonin gene-related peptide (CGRP), phosphorylated Stat3 (Tyr705), and hairy/enhancer of split (Hes) 1, and observed cultured fetal lungs upon treatment with IL-6, a Stat3 activator, or cucurbitacin I, a Stat3 inhibitor. Moreover, the interaction of Stat3 signaling and Hes1 was studied using Hes1 gene-deficient mice...
February 28, 2017: Acta Histochemica et Cytochemica
https://www.readbyqxmd.com/read/28384835/validation-of-the-automated-electronic-microemboli-detection-system-in-patients-undergoing-carotid-endarterectomy
#17
Tesse Leunissen, Daniel van Vriesland, Hester den Ruijter, Frans Moll, Werner Mess, Gert Jan de Borst
Purpose To assess the diagnostic value of automatic embolus detection software (AEDS) in transcranial Doppler (TCD) monitoring for the detection of solid microemboli in patients at risk for perioperative stroke during carotid endarterectomy (CEA). Materials and Methods In 50 patients undergoing CEA, perioperative TCD registration was recorded. All recorded events, identified and saved by the AEDS, were analyzed off-line doubly by two human experts (HEs) within a time frame of > 4 months. The inter- and intraobserver variability was assessed...
April 6, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28381154/thyroid-like-follicular-carcinoma-of-the-kidney
#18
Reza Alaghehbandan, Michal Michal, Naoto Kuroda, Ondrej Hes
No abstract text is available yet for this article.
March 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28380062/different-effects-of-fluid-loading-with-saline-gelatine-hydroxyethyl-starch-or-albumin-solutions-on-acid-base-status-in-the-critically-ill
#19
Angélique M E Spoelstra-de Man, Annemieke Smorenberg, A B Johan Groeneveld
INTRODUCTION: Fluid administration in critically ill patients may affect acid-base balance. However, the effect of the fluid type used for resuscitation on acid-base balance remains controversial. METHODS: We studied the effect of fluid resuscitation of normal saline and the colloids gelatine 4%, hydroxyethyl starch (HES) 6%, and albumin 5% on acid-base balance in 115 clinically hypovolemic critically ill patients during a 90 minute filling pressure-guided fluid challenge by a post-hoc analysis of a prospective randomized clinical trial...
2017: PloS One
https://www.readbyqxmd.com/read/28372955/colloids-in-cardiac-surgery-friend-or-foe
#20
Pia Katarina Ryhammer, Mariann Tang, Joachim Hoffmann-Petersen, Dovile Leonaviciute, Jacob Greisen, Marie Storebjerg Gissel, Carl-Johan Jakobsen
OBJECTIVE: The right choice of fluid replacement still is a matter of debate. Recently, two large-scale studies on the use of hydroxyethyl starches (HES) in the intensive care setting have been published, which have caused a huge shift in the daily practice of volume therapy. These results have been applied to patients outside intensive care. The aim of this study was to evaluate the impact this change has had on the outcomes in a large population of cardiac surgery patients, with a focus on the type of colloid infusion...
February 4, 2017: Journal of Cardiothoracic and Vascular Anesthesia
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