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Induced pluripotent stem

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https://www.readbyqxmd.com/read/29243553/disease-modeling-studies-using-induced-pluripotent-stem-cells-are-we-using-enough-controls
#1
Adiv A Johnson, Cynthia Andrews-Pfannkoch, Timothy J Nelson, Jose S Pulido, Alan D Marmorstein
The comparison of differentiated induced pluripotent stem cells (iPSCs) derived from patients with disease to differentiated iPSCs derived from healthy patients enables powerful disease modeling. By performing an informal retrospective survey of disease modeling studies published in high impact journals, we found that the median and average number of controls used in these studies were 1 and 1.6, respectively. The bulk of these studies did not control for age, gender and ethnicity. Since a large proportion of phenotypic differences observed between iPSC lines are due to genetic variation or variation between lines, this is an insufficient number of controls to confidently rule out standard variation...
December 15, 2017: Regenerative Medicine
https://www.readbyqxmd.com/read/29243171/ipscs-based-generation-of-vascular-cells-reprogramming-approaches-and-applications
#2
REVIEW
Diana Klein
Recent advances in the field of induced pluripotent stem cells (iPSCs) research have opened a new avenue for stem cell-based generation of vascular cells. Based on their growth and differentiation potential, human iPSCs constitute a well-characterized, generally unlimited cell source for the mass generation of lineage- and patient-specific vascular cells without any ethical concerns. Human iPSCs-derived vascular cells are perfectly suited for vascular disease modeling studies because patient-derived iPSCs possess the disease-causing mutation, which might be decisive for full expression of the disease phenotype...
December 14, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/29243046/-stem-cell-based-cardiac-regeneration-after-myocardial-infarction
#3
REVIEW
M Reinsch, F Weinberger
Myocardial infarction leads to an irreversible loss of vital myocardial cells. The transplantation of new cardiomyocytes into the heart was first described over 20 years ago and represents a straightforward approach to remuscularize a damaged heart. Due to the lack of human cells a clinical application seemed ambitious; however, dramatic progress in stem cell biology over the last two decades has paved the way towards a clinical application. This is especially important as the prognosis for patients with terminal heart failure is still poor...
December 14, 2017: Herz
https://www.readbyqxmd.com/read/29241918/human-amniotic-fluid-stem-cells-have-better-potential-in-early-second-trimester-of-pregnancy-and-can-be-reprogramed-to-ips
#4
S W Steven Shaw, Po-Jen Cheng, Yao-Lung Chang, An-Shine Chao, Tzu-Hao Wang, Shuenn-Dyh Chang, T'sang-T'ang Hsieh, Kuo-Hsuan Chang
OBJECTIVE: To study the difference of amniotic fluid stem cell potential at different gestational age. MATERIALS AND METHODS: Second trimester amniocentesis was performed during 15 to 22nd week of gestational age in a single medical center from 2015 to 2016. Early second trimester amniotic fluid stem cells (E-AFS) and later one (L-AFS) were defined 15-18th week, and 19-22nd week, respectively. Cell characteristics, surface markers and ability to form induced pluripotent stem cells (iPS) were studied...
December 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/29241165/sc1-promotes-mir124-3p-expression-to-maintain-the-self-renewal-of-mouse-embryonic-stem-cells-by-inhibiting-the-mek-erk-pathway
#5
Qing Wei, Hongliang Liu, Zhiying Ai, Yongyan Wu, Yingxiang Liu, Zhaopeng Shi, Xuexue Ren, Zekun Guo
BACKGROUND/AIMS: Self-renewal is one of the most important features of embryonic stem (ES) cells. SC1 is a small molecule modulator that effectively maintains the self-renewal of mouse ES cells in the absence of leukemia inhibitory factor (LIF), serum and feeder cells. However, the mechanism by which SC1 maintains the undifferentiated state of mouse ES cells remains unclear. METHODS: In this study, microarray and small RNA deep-sequencing experiments were performed on mouse ES cells treated with or without SC1 to identify the key genes and microRNAs that contributed to self-renewal...
December 12, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29239282/generation-of-human-induced-pluripotent-stem-cells-from-wolfram-syndrome-type-2-patients-bearing-the-c-103-1g-a-cisd2-mutation-for-disease-modeling
#6
Alberto La Spada, Aikaterini Ntai, Stefano Genovese, Maurizio Rondinelli, Pasquale De Blasio, Ida Biunno
Wolfram syndrome (WFS) is a rare autosomal premature aging syndrome that shows signs of diabetes mellitus (DM), optic atrophy (OA) and deafness in addition to central nervous system and endocrine complications. The frequent form of WFS, type 1 (WFS1), harbours causative mutations in the WFS1 gene, while the rare form or type 2 (WFS2), involves CISD2. Mutations in these two genes are recognized by a subset of variable clinical symptoms and a set of overlapping features. Here we report on the generation of stable human induced pluripotent stem cells (hiPSCs) derived from primary fibroblasts of a previously reported Italian family with CISD2 mutation (c...
December 14, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/29238012/announcement-ueda-heart-award-for-2017
#7
(no author information available yet)
We are pleased to announce that the following 4 articles have been selected for the the UEDA Heart Awards for the Year 2017.First PlaceGeneration of Induced Pluripotent Stem Cells From Patients With Duchenne Muscular Dystrophy and Their Induction to CardiomyocytesAkihito Hashimoto, Atsuhiko T. Naito, Jong-Kook Lee, Rika Kitazume-Taneike, Masamichi Ito, Toshihiro Yamaguchi, Ryo Nakata, Tomokazu Sumida, Katsuki Okada, Akito Nakagawa, Tomoaki Higo, Yuki Kuramoto, Taku Sakai, Koji Tominaga, Takeshi Okinaga, Shigetoyo Kogaki, Keiichi Ozono, Shigeru Miyagawa, Yoshiki Sawa, Yasushi Sakata, Hiroyuki Morita, Akihiro Umezawa, Issei KomuroInt Heart J 2016 ; 57 (1) : 112-117Second PlaceEffect of Allopurinol on Myocardial Energy Metabolism in Chronic Heart Failure Rats After Myocardial InfarctZhenzhen Wang, Juan Ding, Xiang Luo, Siliang Zhang, Gang Yang, Que Zhu, Dichuan LiuInt Heart J 2016 ; 57 (6) : 753-759Third PlacePlasma Levels of Receptor for Advanced Glycation End-Products and High-Mobility Group Box 1 in Patients With Pulmonary HypertensionSatoshi Suzuki, Kazuhiko Nakazato, Koichi Sugimoto, Akiomi Yoshihisa, Takayoshi Yamaki, Hiroyuki Kunii, Hitoshi Suzuki, Shu-ichi Saitoh, Yasuchika TakeishiInt Heart J 2016 ; 57 (2) : 234-240Tolvaptan Reduces Long-Term Total Medical Expenses and Length of Stay in Aquaporin-Defined RespondersTeruhiko Imamura, Koichiro Kinugawa, Daisuke Nitta, Issei KomuroInt Heart J 2016 ; 57 (5) : 593-599November 2017International Heart Journal Association...
2017: International Heart Journal
https://www.readbyqxmd.com/read/29237539/cdkn2a-deficiency-promotes-adipose-tissue-browning
#8
Nabil Rabhi, Sarah Anissa Hannou, Xavier Gromada, Elisabet Salas, Xi Yao, Frédérik Oger, Charlène Carney, Isabel C Lopez-Mejia, Emmanuelle Durand, Iandry Rabearivelo, Amélie Bonnefond, Emilie Caron, Lluis Fajas, Christian Dani, Philippe Froguel, Jean-Sébastien Annicotte
OBJECTIVES: Genome-wide association studies have reported that DNA polymorphisms at the CDKN2A locus modulate fasting glucose in human and contribute to type 2 diabetes (T2D) risk. Yet the causal relationship between this gene and defective energy homeostasis remains elusive. Here we sought to understand the contribution of Cdkn2a to metabolic homeostasis. METHODS: We first analyzed glucose and energy homeostasis from Cdkn2a-deficient mice subjected to normal or high fat diets...
December 1, 2017: Molecular Metabolism
https://www.readbyqxmd.com/read/29235536/genetically-unmatched-human-ipsc-and-esc-exhibit-equivalent-gene-expression-and-neuronal-differentiation-potential
#9
Hany E Marei, A Althani, S Lashen, C Cenciarelli, Anwarul Hasan
The potential uniformity between differentiation and therapeutic potential of human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs) remains debatable. We studied the gene expression profiles, pathways analysis and the ability to differentiated into neural progenitor cells (NPCs) and motor neurons (MNs) of genetically unmatched integration-free hiPSC versus hESC to highlight possible differences/similarities between them at the molecular level. We also provided the functional information of the neurons derived from the different hESCs and hiPSCs lines using the Neural Muscular Junction (NMJ) Assay...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29235200/concise-review-the-cellular-conspiracy-of-als
#10
REVIEW
Andrea Serio, Rickie Patani
Amyotrophic lateral sclerosis (ALS) is incurable and devastating. A dearth of therapies has galvanized experimental focus onto the cellular and molecular mechanisms that both initiate and subsequently drive motor neuron (MN) degeneration. A traditional view of ALS pathogenesis posits that disease-specific injury to a subtype of neurons is mechanistically cell-autonomous. This "neuron-centric" view has biased past research efforts. However, a wealth of accumulating evidence now strongly implicates non-neuronal cells as being major determinants of ALS...
December 13, 2017: Stem Cells
https://www.readbyqxmd.com/read/29234887/ips-cells-in-the-study-of-pd-molecular-pathogenesis
#11
REVIEW
Melanie M Cobb, Abinaya Ravisankar, Gaia Skibinski, Steven Finkbeiner
Parkinson's disease (PD) is the second most common neurodegenerative disease and its pathogenic mechanisms are poorly understood. The majority of PD cases are sporadic but a number of genes are associated with familial PD. Sporadic and familial PD have many molecular and cellular features in common, suggesting some shared pathogenic mechanisms. Induced pluripotent stem cells (iPSCs) have been derived from patients harboring a range of different mutations of PD-associated genes. PD patient-derived iPSCs have been differentiated into relevant cell types, in particular dopaminergic neurons and used as a model to study PD...
December 12, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/29234093/crispr-cas9-microinjection-in-oocytes-disables-pancreas-development-in-sheep
#12
Marcela Vilarino, Sheikh Tamir Rashid, Fabian Patrik Suchy, Bret Roberts McNabb, Talitha van der Meulen, Eli J Fine, Syed Ahsan, Nurlybek Mursaliyev, Vittorio Sebastiano, Santiago Sain Diab, Mark O Huising, Hiromitsu Nakauchi, Pablo J Ross
One of the ultimate goals of regenerative medicine is the generation of patient-specific organs from pluripotent stem cells (PSCs). Sheep are potential hosts for growing human organs through the technique of blastocyst complementation. We report here the creation of pancreatogenesis-disabled sheep by oocyte microinjection of CRISPR/Cas9 targeting PDX1, a critical gene for pancreas development. We compared the efficiency of target mutations after microinjecting the CRISPR/Cas9 system in metaphase II (MII) oocytes and zygote stage embryos...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29234013/the-differentiation-stage-of-transplanted-stem-cells-modulates-nerve-regeneration
#13
Ching-Wen Huang, Wen-Chin Huang, Xuefeng Qiu, Flavia Fernandes Ferreira da Silva, Aijun Wang, Shyam Patel, Leon J Nesti, Mu-Ming Poo, Song Li
In regenerative medicine applications, the differentiation stage of implanted stem cells must be optimized to control cell fate and enhance therapeutic efficacy. We investigated the therapeutic potential of human induced pluripotent stem cell (iPSC)-derived cells at two differentiation stages on peripheral nerve regeneration. Neural crest stem cells (NCSCs) and Schwann cells (NCSC-SCs) derived from iPSCs were used to construct a tissue-engineered nerve conduit that was applied to bridge injured nerves in a rat sciatic nerve transection model...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29233979/extracellular-vesicles-from-human-induced-pluripotent-stem-cell-derived-mesenchymal-stromal-cells-hipsc-mscs-protect-against-renal-ischemia-reperfusion-injury-via-delivering-specificity-protein-sp1-and-transcriptional-activating-of-sphingosine-kinase-1-and
#14
Xiaodong Yuan, Dawei Li, Xiaosong Chen, Conghui Han, Longmei Xu, Tao Huang, Zhen Dong, Ming Zhang
Renal ischemia-reperfusion is a main cause of acute kidney injury (AKI), which is associated with high mortality. Here we show that extracellular vesicles (EVs) secreted from hiPSC-MSCs play a critical role in protection against renal I/R injury. hiPSC-MSCs-EVs can fuse with renal cells and deliver SP1 into target cells, subsequently active SK1 expression and increase S1P formation. Chromatin immunoprecipitation (ChIP) analyses and luciferase assay were used to confirm SP1 binds directly to the SK1 promoter region and promote promoter activity...
December 11, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29233823/large-cardiac-muscle-patches-engineered-from-human-induced-pluripotent-stem-cell-derived-cardiac-cells-improve-recovery-from-myocardial-infarction-in-swine
#15
Ling Gao, Zachery R Gregorich, Wuqiang Zhu, Saidulu Mattapally, Yasin Oduk, Xi Lou, Ramaswamy Kannappan, Anton V Borovjagin, Gregory P Walcott, Andrew E Pollard, Vladimir G Fast, Xinyang Hu, Steven G Lloyd, Ying Ge, Jianyi Zhang
Background -Here, we generated human cardiac muscle patches (hCMPs) of clinically relevant dimensions (4 cm × 2 cm × 1.25 mm) by suspending cardiomyocytes, smooth-muscle cells, and endothelial cells that had been differentiated from human induced-pluripotent stem cells (hiPSCs) in a fibrin scaffold and then culturing the construct on a dynamic (rocking) platform. Methods -In vitro assessments of hCMPs suggest maturation in response to dynamic culture stimulation. In vivo assessments were conducted in a porcine model of myocardial infarction (MI)...
December 12, 2017: Circulation
https://www.readbyqxmd.com/read/29233750/fibrin-hydrogels-as-a-xenofree-and-rapidly-degradable-support-for-transplantation-of-retinal-pigment-epithelium-monolayers
#16
Jarel K Gandhi, Zahid Manzar, Lori A Bachman, Cynthia Andrews-Pfannkoch, Travis Knudsen, Matthew Hill, Hannah Schmidt, Raymond Iezzi, Jose S Pulido, Alan D Marmorstein
Recent phase 1 trials of embryonic stem cell and induced pluripotent stem cell (iPSCs) derived RPE transplants for the treatment of macular degeneration have demonstrated the relative safety of this process. However, there is concern over clumping, thickening, folding, and wrinkling of the transplanted RPE. To deliver a flat RPE monolayer, current phase 1 trials are testing synthetic substrates for RPE transplantation. These substrates, however, cause localized inflammation and fibrosis in animal models due to long degradation times...
December 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29233552/a-refined-culture-system-for-human-induced-pluripotent-stem-cell-derived-intestinal-epithelial-organoids
#17
Yu Takahashi, Shintaro Sato, Yosuke Kurashima, Tomohisa Yamamoto, Shiho Kurokawa, Yoshikazu Yuki, Naoki Takemura, Satoshi Uematsu, Chen-Yi Lai, Makoto Otsu, Hiroshi Matsuno, Hideki Osawa, Tsunekazu Mizushima, Junichi Nishimura, Mikio Hayashi, Takayuki Yamaguchi, Hiroshi Kiyono
Gut epithelial organoids are routinely used to investigate intestinal biology; however, current culture methods are not amenable to genetic manipulation, and it is difficult to generate sufficient numbers for high-throughput studies. Here, we present an improved culture system of human induced pluripotent stem cell (iPSC)-derived intestinal organoids involving four methodological advances. (1) We adopted a lentiviral vector to readily establish and optimize conditioned medium for human intestinal organoid culture...
December 1, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29233551/generation-of-adrenal-chromaffin-like-cells-from-human-pluripotent-stem%C3%A2-cells
#18
Kwaku Dad Abu-Bonsrah, Dongcheng Zhang, Andrew R Bjorksten, Mirella Dottori, Donald F Newgreen
Adrenomedullary chromaffin cells are catecholamine (CA)-producing cells originating from trunk neural crest (NC) via sympathoadrenal progenitors (SAPs). We generated NC and SAPs from human embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs) in vitro via BMP2/FGF2 exposure, ascertained by qPCR and immunoexpression of SOX10, ASCL1, TFAP2α, and PHOX2B, and by fluorescence-activated cell sorting selection for p75NTR and GD2, and confirmed their trunk-like HOX gene expression. We showed that continuing BMP4 and curtailing FGF2 in vitro, augmented with corticosteroid mimetic, induced these cells to upregulate the chromaffin cell-specific marker PNMT and other CA synthesis and storage markers, and we demonstrated noradrenaline and adrenaline by Faglu and high-performance liquid chromatography...
November 27, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/29232694/hyperbranched-poly-%C3%AF%C2%B5-lysine-substrate-presenting-the-laminin-sequence-yigsr-induces-the-formation-of-spheroids-in-adult-bone-marrow-stem-cells
#19
Valeria Perugini, Steve T Meikle, Anna L Guildford, Matteo Santin
Unlike the fibroblast-like cells formed upon monolayer culture of human mesenchymal stem cells, the natural stem cell niche of the bone marrow and other types of tissues favours the formation of 3-dimensional (3D) cell clusters. The structuring and biological activity of these clusters are regulated by the contacts established by cells with both the basement membrane and neighbour cells and results in their asymmetric division and the consequent maintenance of both a stem population and a committed progeny...
2017: PloS One
https://www.readbyqxmd.com/read/29230877/neonatal-mouse-cortical-but-not-isogenic-human-astrocyte-feeder-layers-enhance-the-functional-maturation-of-induced-pluripotent-stem-cell-derived-neurons-in-culture
#20
Fritz W Lischka, Anastasia Efthymiou, Qiong Zhou, Michael D Nieves, Nikki M McCormack, Matthew D Wilkerson, Gauthaman Sukumar, Clifton L Dalgard, Martin L Doughty
Human induced pluripotent stem (iPS) cell-derived neurons and astrocytes are attractive cellular tools for nervous system disease modeling and drug screening. Optimal utilization of these tools requires differentiation protocols that efficiently generate functional cell phenotypes in vitro. As nervous system function is dependent on networked neuronal activity involving both neuronal and astrocytic synaptic functions, we examined astrocyte effects on the functional maturation of neurons from human iPS cell-derived neural stem cells (NSCs)...
December 12, 2017: Glia
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