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https://www.readbyqxmd.com/read/28817722/nicotinamide-alone-accelerates-the-conversion-of-mouse-embryonic-stem-cells-into-mature-neuronal-populations
#1
Síle M Griffin, Mark R Pickard, Rowan P Orme, Clive P Hawkins, Adrian C Williams, Rosemary A Fricker
INTRODUCTION: Vitamin B3 has been shown to play an important role during embryogenesis. Specifically, there is growing evidence that nicotinamide, the biologically active form of vitamin B3, plays a critical role as a morphogen in the differentiation of stem cells to mature cell phenotypes, including those of the central nervous system (CNS). Detailed knowledge of the action of small molecules during neuronal differentiation is not only critical for uncovering mechanisms underlying lineage-specification, but also to establish more effective differentiation protocols to obtain clinically relevant cells for regenerative therapies for neurodegenerative conditions such as Huntington's disease (HD)...
2017: PloS One
https://www.readbyqxmd.com/read/28815778/mapk8-regulates-chicken-male-germ-cell-differentiation-through-jnk-signaling-pathway
#2
Yingjie Wang, Yulin Bi, Qisheng Zuo, Wenhui Zhang, Dong Li, Na-Na He, Shaoze Cheng, Ya-Ni Zhang, Bichun Li
The study aims to analyze the key signaling pathways in regulating the process of embryonic stem cells (ESCs) differentiation into spermatogonial stem cells (SSCs). We explored the specific regulating mechanisms of C-Jun amino-terminal kinase (JNK) signaling in this process. Interference/overexpression of MAPK8 allows the JNK signaling pathway to be blocked/activated. In Retinoic acid (RA) induced in vitro differentiation assays, the expression of germ cell marker genes, cvh, c-kit, integrin α6 and integrin β1, was observed to upregulate while activating JNK signaling significantly...
August 16, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28815176/strategies-for-retinal-cell-generation-from-human-pluripotent-stem-cells
#3
REVIEW
Lindsey S Weed, Jason A Mills
Induced pluripotent stem cells (iPSCs) are specialized self-renewing cells that are generated by exogenously expressing pluripotency-associated transcription factors in somatic cells such as fibroblasts, peripheral blood mononuclear cells, or lymphoblastoid cell lines (LCLs). iPSCs are functionally similar to naturally pluripotent embryonic stem cells (ESCs) in their capacity to propagate indefinitely and potential to differentiate into all human cell types, and are devoid of the associated ethical complications of origin...
2017: Stem Cell Investigation
https://www.readbyqxmd.com/read/28810904/antiarrhythmic-drug-therapy-among-patients-presenting-to-emergency-department-with-symptomatic-atrial-fibrillation-a-prospective-nationwide-cohort
#4
Tero Penttilä, Heikki Mäkynen, Juha Hartikainen, Harri Hyppölä, Timo Lauri, Mika Lehto, Juha Lund, M J Pekka Raatikainen
BACKGROUND: Atrial fibrillation (AF) is a common arrhythmia that causes numerous visits to emergency departments (ED). The aim of the FinFib2 study was to evaluate whether treatment of patients with AF in ED is consistent with the contemporary European Society of Cardiology (ESC) management guidelines. Here we report the results of antiarrhythmic drug therapy (AAD) in ED. METHODS: All patients within the two-week study period whose primary reason for the ED visit was symptomatic AF were included into this prospective multicentre study...
August 15, 2017: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/28807133/the-tense-the-hostile-and-the-distressed-multidimensional-psychosocial-risk-profiles-based-on-the-esc-interview-in-coronary-artery-disease-patients-the-thoresci-study
#5
Eveline van Montfort, Johan Denollet, Jeroen K Vermunt, Jos Widdershoven, Nina Kupper
BACKGROUND: While single psychosocial factors have been associated with cardiovascular outcomes, it is still unclear how they cluster. Therefore, we examined whether latent multidimensional psychosocial risk profiles could be identified in the European Society of Cardiology (ESC) psychosocial screening interview. Additionally we examined whether these profiles were associated with specific sociodemographic, clinical, and psychosocial characteristics. METHOD: 681 coronary artery disease patients (age=64...
July 2017: General Hospital Psychiatry
https://www.readbyqxmd.com/read/28807034/exosomes-from-embryonic-mesenchymal-stem-cells-alleviate-osteoarthritis-through-balancing-synthesis-and-degradation-of-cartilage-extracellular-matrix
#6
Yafei Wang, Dongsheng Yu, Zhiming Liu, Fang Zhou, Jun Dai, Bingbing Wu, Jing Zhou, Boon Chin Heng, Xiao Hui Zou, Hongwei Ouyang, Hua Liu
BACKGROUND: Mesenchymal stem cell therapy for osteoarthritis (OA) has been widely investigated, but the mechanisms are still unclear. Exosomes that serve as carriers of genetic information have been implicated in many diseases and are known to participate in many physiological processes. Here, we investigate the therapeutic potential of exosomes from human embryonic stem cell-induced mesenchymal stem cells (ESC-MSCs) in alleviating osteoarthritis (OA). METHODS: Exosomes were harvested from conditioned culture media of ESC-MSCs by a sequential centrifugation process...
August 14, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28806594/signaling-networks-in-the-control-of-pluripotency
#7
REVIEW
Hanzhi Zhao, Ying Jin
Embryonic stem cells (ESCs) are characterized by their ability of unlimited self-renewal in vitro and pluripotent developmental potential, which endows them with great values in basic research and future clinical application. However, realization of full potential of ESCs is dependent on the elucidation of molecular mechanisms governing ESCs, among which signaling pathways play critical roles. A great deal of efforts has been made in the past decades to understand what and how signaling pathways contribute to the establishment and maintenance of pluripotency...
August 11, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28805906/technical-note-induction-of-pluripotent-stem-cell-like-cells-from-chicken-feather-follicle-cells
#8
Y M Kim, Y H Park, J M Lim, H Jung, J Y Han
Pluripotent stem cells including embryonic stem cells (ESC) and induced pluripotent stem cells (iPSC) are regarded as representative tools for conservation of animal genetic resources. Although ESC have been established from chicken, it is very difficult to obtain enough embryos for isolation of stem cells for avian conservation in most wild birds. Therefore, the high feasibility of obtaining the pluripotent cell is most important in avian conservation studies. In this study, we generated induced pluripotent stem cell-like cells (iPSLC) from avian Feather Follicular cells (FFC)...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28804500/pluripotent-stem-cell-metabolism-and-mitochondria-beyond-atp
#9
REVIEW
Jarmon G Lees, David K Gardner, Alexandra J Harvey
Metabolism is central to embryonic stem cell (ESC) pluripotency and differentiation, with distinct profiles apparent under different nutrient milieu, and conditions that maintain alternate cell states. The significance of altered nutrient availability, particularly oxygen, and metabolic pathway activity has been highlighted by extensive studies of their impact on preimplantation embryo development, physiology, and viability. ESC similarly modulate their metabolism in response to altered metabolite levels, with changes in nutrient availability shown to have a lasting impact on derived cell identity through the regulation of the epigenetic landscape...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28802734/adding-markers-of-organ-damage-to-risk-score-models-improves-cardiovascular-risk-assessment-prospective-analysis-of-a-large-cohort-of-adult-outpatients
#10
Giuliano Tocci, Ilaria Figliuzzi, Vivianne Presta, Nadia Attalla El Halabieh, Barbara Citoni, Roberta Coluccia, Allegra Battistoni, Andrea Ferrucci, Massimo Volpe
INTRODUCTION: Global cardiovascular (CV) risk stratification is recommended in all outpatients. Risk score charts, however, do not include markers of organ damage (OD). AIM: To evaluate the potential added value of including different markers of subclinical OD to US Framingham, European SCORE and Italian Cuore risk score calculators. METHODS: We prospectively evaluated adult outpatients, who underwent blood pressure (BP) assessment and global CV risk stratification...
July 25, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28798779/one-swallow-does-not-a-summer-make-but-many-swallows-do-accumulating-clinical-evidence-for-nearly-eliminated-peri-procedural-and-30-day-complications-with-mesh-covered-stents-transforms-the-carotid-revascularisation-field
#11
REVIEW
Piotr Musiałek, L Nelson Hopkins, Adnan H Siddiqui
Atherosclerotic carotid artery stenosis (CS) continues to be a common cause of acute ischaemic stroke. Optimised medical therapy (OMT), the first-line treatment modality in CS, may reduce or delay - but it does not abolish - CS-related strokes. As per current AHA/ASA and ESC/ESVS/ESO guidelines, carotid artery stenting (CAS) is a less-invasive alternative to carotid endarterectomy (CEA) for CS revascularisation in primary and secondary stroke prevention. Ten-year follow-up from the CREST trial in patients with symptomatic and asymptomatic CS confirmed equipoise of CAS and CEA in the primary endpoint...
2017: Postępy W Kardiologii Interwencyjnej, Advances in Interventional Cardiology
https://www.readbyqxmd.com/read/28796841/single-cell-qpcr-reveals-that-additional-hand2-and-microrna-1-facilitate-the-early-reprogramming-progress-of-seven-factor-induced-human-myocytes
#12
Emre Bektik, Adrienne Dennis, Prateek Prasanna, Anant Madabhushi, Ji-Dong Fu
The direct reprogramming of cardiac fibroblasts into induced cardiomyocyte (CM)-like cells (iCMs) holds great promise in restoring heart function. We previously found that human fibroblasts could be reprogrammed toward CM-like cells by 7 reprogramming factors; however, iCM reprogramming in human fibroblasts is both more difficult and more time-intensive than that in mouse cells. In this study, we investigated if additional reprogramming factors could quantitatively and/or qualitatively improve 7-factor-mediated human iCM reprogramming by single-cell quantitative PCR...
2017: PloS One
https://www.readbyqxmd.com/read/28796232/reconstitution-of-mouse-oogenesis-in-a-dish-from-pluripotent-stem-cells
#13
Katsuhiko Hayashi, Orie Hikabe, Yayoi Obata, Yuji Hirao
This protocol is an extension to: Nat. Protoc. 8, 1513-1524 (2013); doi: 10.1038/nprot.2013.090; published online 11 July 2013Generation of functional oocytes in culture from pluripotent stem cells should provide a useful model system for improving our understanding of the basic mechanisms underlying oogenesis. In addition, it has potential applications as an alternative source of oocytes for reproduction. Using the most advanced mouse model in regard to reproductive engineering and stem cell biology, we previously developed a culture method that produces functional primorial germ cells starting from pluripotent cells in culture and described it in a previous protocol...
September 2017: Nature Protocols
https://www.readbyqxmd.com/read/28791832/prognostic-factors-in-pulmonary-arterial-hypertension-literature-review
#14
REVIEW
Emilia Stępnowska, Ewa Lewicka, Alicja Dąbrowska-Kugacka, Paweł Miękus, Grzegorz Raczak
Pulmonary arterial hypertension is a disease that has a bad influence on the patient's prognosis. Recently, the possibility of therapy has dramatically changed. Nowadays, the treatment of this disease is concerned mainly with the pathophysiological target. In clinical practice, it is important to start therapy at the appropriate time, when the patient is qualified because of an unsatisfactory examination result or improve therapy when the patient is getting worse. The understanding of prognosis factors in pulmonary arterial hypertension is necessary, because it is used to determine the length of patients' life expectancy...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28783314/deciphering-the-role-of-sulfonated-unit-in-heparin-mimicking-polymer-to-promote-neural-differentiation-of-escs
#15
Jiehua Lei, Yuqi Yuan, Zhonglin Lyu, Mengmeng Wang, Qi Liu, Hongwei Wang, Lin Yuan, Hong Chen
Glycosaminoglycans (GAGs), especially heparin and heparan sulfate (HS) hold great potential for inducing the neural differentiation of embryonic stem cells (ESCs) and have brought new hope for the treatment of neurological diseases. However, the disadvantages of natural heparin/HS, such as difficulty in isolating with a sufficient amount, highly heterogeneous in structure, the risk of immune responses, have limited their further therapeutic applications. Thus, there is a great demand for stable, controllable and well-defined synthetic alternatives of heparin/HS with more effective biological functions...
August 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28781077/embryonic-stem-cell-differentiation-to-functional-arterial-endothelial-cells-through-sequential-activation-of-etv2-and-notch1-signaling-by-hif1%C3%AE
#16
Kit Man Tsang, James S Hyun, Kwong Tai Cheng, Micaela Vargas, Dolly Mehta, Masuko Ushio-Fukai, Li Zou, Kostandin V Pajcini, Jalees Rehman, Asrar B Malik
The generation of functional arterial endothelial cells (aECs) from embryonic stem cells (ESCs) holds great promise for vascular tissue engineering. However, the mechanisms underlying their generation and the potential of aECs in revascularizing ischemic tissue are not fully understood. Here, we observed that hypoxia exposure of mouse ESCs induced an initial phase of HIF1α-mediated upregulation of the transcription factor Etv2, which in turn induced the commitment to the EC fate. However, sustained activation of HIF1α in these EC progenitors thereafter induced NOTCH1 signaling that promoted the transition to aEC fate...
July 24, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28781074/activin-signals-through-smad2-3-to-increase-photoreceptor-precursor-yield-during-embryonic-stem-cell-differentiation
#17
Amy Q Lu, Evgenya Y Popova, Colin J Barnstable
In vitro differentiation of mouse embryonic stem cells (ESCs) into retinal fates can be used to study the roles of exogenous factors acting through multiple signaling pathways during retina development. Application of activin A during a specific time frame that corresponds to early embryonic retinogenesis caused increased generation of CRX(+) photoreceptor precursors and decreased PAX6(+) retinal progenitor cells (RPCs). Following activin A treatment, SMAD2/3 was activated in RPCs and bound to promoter regions of key RPC and photoreceptor genes...
July 18, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28780625/markers-associated-with-neuron-specific-ube3a-imprinting-during-neuronal-differentiation-of-mouse-embryonic-stem-cells
#18
Masamitsu Eitoku, Hidemasa Kato, Narufumi Suganuma, Hidenori Kiyosawa
Understanding gene expression in the brain requires allele-specific transcriptome analysis because of the presence of neuron-specific imprinted genes, which are expressed in a neuron-specific and parent-of-origin-specific manner. Ube3a is a neuron-specific imprinted gene with an expression pattern that changes from biallelic to maternal only (Ube3a imprinting) during differentiation. Because Ube3a imprinting occurs only in neurons, it has the potential to be a marker to assess the quality of neurons produced by in vitro neuronal differentiation of embryonic stem cells (ESCs)...
August 5, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28780105/short-communication-extended-spectrum-cephalosporin-resistant-escherichia-coli-in-colostrum-from-new-brunswick-canada-dairy-cows-harbor-blacmy-2-and-blatem-resistance-genes
#19
B B Awosile, J T McClure, J Sanchez, J VanLeeuwen, J C Rodriguez-Lecompte, G Keefe, L C Heider
Dairy calves are colonized shortly after birth by multidrug resistant (MDR) bacteria, including Escherichia coli. The role of dairy colostrum fed to calves as a potential source of MDR bacteria resistance genes has not been investigated. This study determined the recovery rate of extended-spectrum cephalosporin-resistant (ESC-R) E. coli in colostrum from cows. The ESC-R E. coli isolates were further investigated to determine their phenotypic antimicrobial resistance pattern and the genes conferring ESC-R. Fresh colostrum was collected from 452 cows from 8 dairy herds in New Brunswick, Canada...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28777970/identification-of-characteristics-and-frequent-scenarios-of-single-vehicle-rollover-crashes-during-pre-ballistic-phase-part-1-a-descriptive-study
#20
Taewung Kim, Dipan Bose, Jon Foster, Varun Bollapragada, Jeff R Crandall, Mark Clauser, Jason R Kerrigan
This study aimed to identify common patterns of pre-ballistic vehicle kinematics and roadway characteristics of real-world rollover crashes. Rollover crashes that were enrolled in the National Automotive Sampling System-Crashworthiness Data System (NASS-CDS) between the years 2000 and 2010 were analyzed. A descriptive analysis was performed to understand the characteristics of the pre-ballistic phase. Also, a frequency based pattern analysis was performed using a selection of NASS-CDS variables describing the pre-ballistic vehicle kinematics and roadway characteristics to rank common pathways of rollover crashes...
August 1, 2017: Accident; Analysis and Prevention
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