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https://www.readbyqxmd.com/read/28098757/role-of-mir-34a-5p-in-hematopoietic-progenitor-cells-proliferation-and-fate-decision-novel-insights-into-the-pathogenesis-of-primary-myelofibrosis
#1
Elisa Bianchi, Samantha Ruberti, Sebastiano Rontauroli, Paola Guglielmelli, Simona Salati, Chiara Rossi, Roberta Zini, Enrico Tagliafico, Alessandro Maria Vannucchi, Rossella Manfredini
Primary Myelofibrosis (PMF) is a chronic Philadelphia-negative myeloproliferative neoplasm characterized by a skewed megakaryopoiesis and an overproduction of proinflammatory and profibrotic mediators that lead to the development of bone marrow (BM) fibrosis. Since we recently uncovered the upregulation of miR-34a-5p in PMF CD34+ hematopoietic progenitor cells (HPCs), in order to elucidate its role in PMF pathogenesis here we unravelled the effects of miR-34a-5p overexpression in HPCs. We showed that enforced expression of miR-34a-5p partially constrains proliferation and favours the megakaryocyte and monocyte/macrophage commitment of HPCs...
January 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28098485/effects-of-umbilical-cord-blood-stem-cells-on-healing-factors-for-diabetic-foot-injuries
#2
N Çil, E O Oğuz, E Mete, A Çetinkaya, G A Mete
The use of stem or progenitor cells from bone marrow, or peripheral or umbilical cord blood is becoming more common for treatment of diabetic foot problems. These cells promote neovascularization by angiogenic factors and they promote epithelium formation by stimulating cell replication and migration under certain pathological conditions. We investigated the role of CD34 + stem cells from human umbilical cord blood in wound healing using a rat model. Rats were randomly divided into a control group and two groups with diabetes induced by a single dose of 55 mg/kg intraperitoneal streptozocin...
January 18, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28098170/targeting-the-pi3k-akt-pathway-via-gli1-inhibition-enhanced-the-drug-sensitivity-of-acute-myeloid-leukemia-cells
#3
Hui Liang, Qi-Li Zheng, Peng Fang, Jian Zhang, Tuo Zhang, Wei Liu, Min Guo, Christopher L Robinson, Shui-Bing Chen, Xiao-Ping Chen, Fang-Ping Chen, Hui Zeng
Combination targeted therapy is commonly used to treat acute myeloid leukemia (AML) patients, particularly in refractory/relapse (RR) population. However, concerns have been raised regarding the safety and patient tolerance of combination chemotherapy. It is critical to choose the appropriate treatment for precision therapy. We performed genome-wide RNA profiling using RNA-Seq to compare the RR group and the complete remission (CR) group (a total of 42 adult AML patients). The Hedgehog (Hh) and PI3K/AKT pathways were upregulated in the RR population, which was further confirmed by western blot and/or qPCR...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097739/cellular-plasticity-in-cardiovascular-development-and-disease
#4
REVIEW
Soumyashree Das, Kristy Red-Horse
Knowledge on cellular differentiation pathways is critical to understanding organ development, homeostasis, and disease. Studying cell differentiation and cell fate restrictions in these contexts can be done through lineage tracing experiments, which entail permanent labeling of a cell and all its progeny. Recent lineage experiments within the cardiovascular system have uncovered unexpected findings on cellular origins during organogenesis and cell plasticity during disease. For example, there is increasing evidence that multiple progenitor sources exist for a single cell type, and that cells have remarkable expansive capacities under disease settings...
January 18, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28096434/precocious-glucocorticoid-exposure-reduces-skeletal-muscle-satellite-cells-in-the-fetal-rat
#5
Ganga Gokulakrishnan, Xiaoyan Chang, Ryan Fleischmann, Marta Fiorotto
Perinatal skeletal muscle growth rates are a function of protein and myonuclear accretion. Precocious exposure of the fetus to glucocorticoids (GLC) in utero impairs muscle growth. Reduced muscle protein synthesis rates contribute to this response, but the consequences for myonuclear hyperplasia are unknown. To test the hypothesis that blunting of Pax7+ muscle progenitor cell proliferative activity by GLC in vivo also contributes to reduced fetal muscle growth, pregnant rats were administered dexamethasone (DEX;1 mg/L drinking water) from embryonic day (ED) 13 to ED21...
January 17, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28096344/atrial-natriuretic-peptide-regulates-adipose-tissue-accumulation-in-adult-atria
#6
Nadine Suffee, Thomas Moore-Morris, Patrick Farahmand, Catherine Rücker-Martin, Gilles Dilanian, Magali Fradet, Daigo Sawaki, Geneviève Derumeaux, Pascal LePrince, Karine Clément, Isabelle Dugail, Michel Puceat, Stéphane N Hatem
The abundance of epicardial adipose tissue (EAT) is associated with atrial fibrillation (AF), the most frequent cardiac arrhythmia. However, both the origin and the factors involved in EAT expansion are unknown. Here, we found that adult human atrial epicardial cells were highly adipogenic through an epithelial-mesenchymal transition both in vitro and in vivo. In a genetic lineage tracing the WT1(CreERT2+/-)Rosa(tdT+/-) mouse model subjected to a high-fat diet, adipocytes of atrial EAT derived from a subset of epicardial progenitors...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28096272/anti-leukemia-efficacy-and-mechanisms-of-action-of-sl-101-a-novel-anti-cd123-antibody-conjugate-in-acute-myeloid-leukemia
#7
Lina Han, Jeffrey L Jorgensen, Christopher Brooks, Ce Shi, Qi Zhang, Graciela M Nogueras González, Antonio Cavazos, Rongqing Pan, Hong Mu, Sa Wang, Jin Zhou, Gheath Alatrash, Stefan O Ciurea, Michael Rettig, John F DiPersio, Jorge E Cortes, Xuelin Huang, Hagop Kantarjian, Michael Andreeff, Farhad Ravandi-Kashani, Marina Konopleva
PURPOSE: The persistence of leukemia stem cells (LSC)-containing cells after induction therapy may contribute to minimal residual disease (MRD) and relapse in acute myeloid leukemia (AML). We investigated the clinical relevance of CD34+CD123+ LSC-containing cells and anti-leukemia potency of a novel antibody-conjugate SL-101 in targeting CD123+ LSCs. Experimental Methods and Results: In a retrospective study on 86 newly diagnosed AML patients, we demonstrated that a higher proportion of CD34+CD123+ LSC-containing cells in remission was associated with persistent MRD, and predicted shorter relapse-free survival in patients with poor-risk cytogenetics...
January 17, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28096247/order-matters-the-order-of-somatic-mutations-influences-cancer-evolution
#8
David G Kent, Anthony R Green
Cancers evolve as a consequence of multiple somatic lesions, with competition between subclones and sequential subclonal evolution. Some driver mutations arise either early or late in the evolution of different individual tumors, suggesting that the final malignant properties of a subclone reflect the sum of mutations acquired rather than the order in which they arose. However, very little is known about the cellular consequences of altering the order in which mutations are acquired. Recent studies of human myeloproliferative neoplasms show that the order in which individual mutations are acquired has a dramatic impact on the cell biological and molecular properties of tumor-initiating cells...
January 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28096213/endothelial-cell-regulation-of-salivary-gland-epithelial-patterning
#9
Hae Ryong Kwon, Deirdre A Nelson, Kara A DeSantis, Jennifer M Morrissey, Melinda Larsen
Perfusion-independent regulation of epithelial pattern formation by the vasculature during organ development and regeneration is of considerable interest for application in restoring organ function. During murine submandibular salivary gland development, the vasculature co-develops with the epithelium during branching morphogenesis; however, it is not known whether the vasculature has instructive effects on the epithelium. Using pharmacological inhibitors and siRNA knockdown in embryonic organ explants, we determined that VEGFR2-dependent signaling is required for salivary gland epithelial patterning...
January 15, 2017: Development
https://www.readbyqxmd.com/read/28095779/poly-adp-ribose-polymerase-inhibitors-activate-the-p53-signaling-pathway-in-neural-stem-progenitor-cells
#10
Akiko Okuda, Suguru Kurokawa, Masanori Takehashi, Aika Maeda, Katsuya Fukuda, Yukari Kubo, Hyuma Nogusa, Tomoka Takatani-Nakase, Shujiro Okuda, Kunihiro Ueda, Seigo Tanaka
BACKGROUND: Poly(ADP-ribose) polymerase 1 (PARP-1), which catalyzes poly(ADP-ribosyl)ation of proteins by using NAD(+) as a substrate, plays a key role in several nuclear events, including DNA repair, replication, and transcription. Recently, PARP-1 was reported to participate in the somatic cell reprogramming process. Previously, we revealed a role for PARP-1 in the induction of neural apoptosis in a cellular model of cerebral ischemia and suggested the possible use of PARP inhibitors as a new therapeutic intervention...
January 17, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28095743/adult-murine-pancreatic-progenitors-require-egf-and-nicotinamide-for-self-renewal-and-differentiation-in-a-serum-and-conditioned-medium-free-culture
#11
Lena Wedeken, Angela Luo, Jacob R Tremblay, Jeffrey Rawson, Liang Jin, Dan Gao, Janine Quijano, Hsun Teresa Ku
Adult pancreatic stem and progenitor cells may serve as an alternative source of insulin-secreting endocrine cells in cell replacement therapy for type 1 diabetes, but much remained unknown about these cells. We previously identified adult murine pancreatic progenitor-like cells that displayed in vitro self-renewal and tri-lineage differentiation activities in a 3-dimensional colony/organoid assay containing 1% methylcellulose and 5% Matrigel. However, the presence of other undefined culture components, such as serum and conditioned medium, has prevented a complete understanding of the signals required for progenitor cell growth...
January 17, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28095177/integrated-colony-imaging-analysis-and-selection-device-for-regenerative-medicine
#12
Edward Kwee, Edward E Herderick, Thomas Adams, James Dunn, Robert Germanowski, Frank Krakosh, Cynthia Boehm, James Monnich, Kimerly Powell, George Muschler
Stem and progenitor cells derived from human tissues are being developed as cell sources for cell-based assays and therapies. However, tissue-derived stem and progenitor cells are heterogeneous. Differences in observed clones of stem cells likely reflect important aspects of the underlying state of the source cells, as well as future potency for cell therapies. This paper describes a colony analysis and picking device that provides quantitative analysis of heterogeneous cell populations and precise tools for cell picking for research or biomanufacturing applications...
November 1, 2016: Journal of Laboratory Automation
https://www.readbyqxmd.com/read/28094111/rupture-of-the-stem-cell-bag-before-stem-cell-infusion-evolving-standard-operating-procedure
#13
REVIEW
Dries Deeren, Evelyne Dewulf
The lives of recipients of peripheral blood progenitor cells (PBPC) depend upon the availability of PBPC. Rupture of stem cell bags does occur and can have devastating consequences. Each transplant center should agree on a rescue procedure and train its personnel to use it. We provide an example of such a procedure, and its update after the procedure was used for the first time.
December 30, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28094018/single-cell-analysis-reveals-a-close-relationship-between-differentiating-dopamine-and-subthalamic-nucleus-neuronal-lineages
#14
Nigel Kee, Nikolaos Volakakis, Agnete Kirkeby, Lina Dahl, Helena Storvall, Sara Nolbrant, Laura Lahti, Åsa K Björklund, Linda Gillberg, Eliza Joodmardi, Rickard Sandberg, Malin Parmar, Thomas Perlmann
Stem cell engineering and grafting of mesencephalic dopamine (mesDA) neurons is a promising strategy for brain repair in Parkinson's disease (PD). Refinement of differentiation protocols to optimize this approach will require deeper understanding of mesDA neuron development. Here, we studied this process using transcriptome-wide single-cell RNA sequencing of mouse neural progenitors expressing the mesDA neuron determinant Lmx1a. This approach resolved the differentiation of mesDA and neighboring neuronal lineages and revealed a remarkably close relationship between developing mesDA and subthalamic nucleus (STN) neurons, while also highlighting a distinct transcription factor set that can distinguish between them...
January 5, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28094017/predictive-markers-guide-differentiation-to-improve-graft-outcome-in-clinical-translation-of-hesc-based-therapy-for-parkinson-s-disease
#15
Agnete Kirkeby, Sara Nolbrant, Katarina Tiklova, Andreas Heuer, Nigel Kee, Tiago Cardoso, Daniella Rylander Ottosson, Mariah J Lelos, Pedro Rifes, Stephen B Dunnett, Shane Grealish, Thomas Perlmann, Malin Parmar
Stem cell treatments for neurodegenerative diseases are expected to reach clinical trials soon. Most of the approaches currently under development involve transplantation of immature progenitors that subsequently undergo phenotypic and functional maturation in vivo, and predicting the long-term graft outcome already at the progenitor stage remains a challenge. Here, we took an unbiased approach to identify predictive markers expressed in dopamine neuron progenitors that correlate with graft outcome in an animal model of Parkinson's disease through gene expression analysis of >30 batches of grafted human embryonic stem cell (hESC)-derived progenitors...
January 5, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28094016/a-single-cell-roadmap-of-lineage-bifurcation-in-human-esc-models-of-embryonic-brain-development
#16
Zizhen Yao, John K Mich, Sherman Ku, Vilas Menon, Anne-Rachel Krostag, Refugio A Martinez, Leon Furchtgott, Heather Mulholland, Susan Bort, Margaret A Fuqua, Ben W Gregor, Rebecca D Hodge, Anu Jayabalu, Ryan C May, Samuel Melton, Angelique M Nelson, N Kiet Ngo, Nadiya V Shapovalova, Soraya I Shehata, Michael W Smith, Leah J Tait, Carol L Thompson, Elliot R Thomsen, Chaoyang Ye, Ian A Glass, Ajamete Kaykas, Shuyuan Yao, John W Phillips, Joshua S Grimley, Boaz P Levi, Yanling Wang, Sharad Ramanathan
During human brain development, multiple signaling pathways generate diverse cell types with varied regional identities. Here, we integrate single-cell RNA sequencing and clonal analyses to reveal lineage trees and molecular signals underlying early forebrain and mid/hindbrain cell differentiation from human embryonic stem cells (hESCs). Clustering single-cell transcriptomic data identified 41 distinct populations of progenitor, neuronal, and non-neural cells across our differentiation time course. Comparisons with primary mouse and human gene expression data demonstrated rostral and caudal progenitor and neuronal identities from early brain development...
January 5, 2017: Cell Stem Cell
https://www.readbyqxmd.com/read/28093710/role-of-oligodendrocyte-dysfunction-in-demyelination-remyelination-and-neurodegeneration-in-multiple-sclerosis
#17
Adriana Octaviana Dulamea
Oligodendrocytes (OLs) are the myelinating cells of the central nervous system (CNS) during development and throughout adulthood. They result from a complex and well controlled process of activation, proliferation, migration and differentiation of oligodendrocyte progenitor cells (OPCs) from the germinative niches of the CNS. In multiple sclerosis (MS), the complex pathological process produces dysfunction and apoptosis of OLs leading to demyelination and neurodegeneration. This review attempts to describe the patterns of demyelination in MS, the steps involved in oligodendrogenesis and myelination in healthy CNS, the different pathways leading to OLs and myelin loss in MS, as well as principles involved in restoration of myelin sheaths...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28093678/changes-in-serum-vascular-endothelial-growth-factor-and-endostatin-concentrations-associated-with-circulating-endothelial-progenitor-cells-after-acute-ischemic-stroke
#18
Lixia Xue, Hao Chen, Ting Zhang, Jingjiong Chen, Zhi Geng, Yuwu Zhao
Angiogenesis is an important pathophysiological response to cerebral ischemia, and can be modulated by vascular endothelial growth factor (VEGF) and endostatin. Circulating endothelial progenitor cells (EPCs) also play an important role as an endogenous repair mechanism for ischemic injury. We sought to investigate early changes in the expression of VEGF and endostatin in serum and the circulating EPCs in patients with acute ischemic stroke (AIS) and analyzed the relations between them. The peripheral blood and serum samples were obtained from 30 patients at 1, 3, 5 and 7 d after AIS...
January 16, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28093363/alignment-of-collagen-fiber-in-knitted-silk-scaffold-for-functional-massive-rotator-cuff-repair
#19
Zefeng Zheng, Jisheng Ran, Weishan Chen, Yejun Hu, Ting Zhu, Xiao Chen, Zi Yin, Boon Chin Heng, Gang Feng, Huihui Le, Chenqi Tang, Jiayun Huang, Yangwu Chen, Yiting Zhou, Pioletti Dominique, Weiliang Shen, Hong-Wei Ouyang
: Rotator cuff tear is one of the most common types of shoulder injuries, often resulting in pain and physical debilitation. Allogeneic tendon-derived decellularized matrices do not have appropriate pore size and porosity to facilitate cell infiltration, while commercially-available synthetic scaffolds are often inadequate at inducing tenogenic differentiation. The aim of this study is to develop an advanced 3D aligned collagen/silk scaffold (ACS) and investigate its efficacy in a rabbit massive rotator cuff tear model...
January 13, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28093175/re-treatment-of-diabetes-mellitus-induced-erectile-dysfunction-using-endothelial-progenitor-cells-genetically-modified-with-human-telomerase-reverse-transcriptase
#20
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