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https://www.readbyqxmd.com/read/29351587/heat-exposure-induces-oxidative-stress-and-dna-damage-in-the-male-germ-line
#1
Brendan J Houston, Brett Nixon, Jacinta H Martin, Geoffry N D E Iuliis, Elizabeth G Bromfield, Kristen E McEwen, R John Aitkena
The reproductive consequences of global warming are not currently understood. In order to address this issue we have examined the reproductive consequences of exposing male mice to a mild heat stress. For this purpose, adult male mice were exposed to an elevated ambient temperature of 35°C under two exposure models. The first involved acute exposure for 24 hours, followed by recovery periods of between 1 day and 6 weeks. The alternative heating regimen involved a daily exposure of 8 hours for periods of 1 or 2 weeks...
January 17, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29351056/remediation-of-radiation-induced-cognitive-dysfunction-through-oral-administration-of-the-neuroprotective-compound-nsi-189
#2
Barrett Allen, Munjal M Acharya, Celine Lu, Erich Giedzinski, Nicole Chmielewski, David Quach, Mike Hefferan, Karl K Johe, Charles L Limoli
Clinical management of primary and secondary central nervous system (CNS) malignancies frequently includes radiotherapy to forestall tumor growth and recurrence after surgical resection. While cranial radiotherapy remains beneficial, adult and pediatric brain tumor survivors suffer from a wide range of debilitating and progressive cognitive deficits. Although this has been recognized as a significant problem for decades, there remains no clinical recourse for the unintended neurocognitive sequelae associated with these types of cancer treatments...
January 19, 2018: Radiation Research
https://www.readbyqxmd.com/read/29350802/cellular-reprogramming-a-new-way-to-understand-aging-mechanisms
#3
REVIEW
Burcu Yener Ilce, Umut Cagin, Acelya Yilmazer
Increased life expectancy, due to the rise in life quality and the decline in mortality rates, is leading to a society in which the population aged 60 and over is growing more rapidly than the entire population. Although various models and model organisms have been employed to investigate the mechanism of aging, induced pluripotent stem cells (iPSCs) are useful candidates to study human aging and age-related human diseases. This work discusses how iPSCs can be used as an alternative to the model organisms such as yeast, Caenorhabditis elegans, Drosophila melanogaster, or the mouse...
January 19, 2018: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/29350399/biological-functions-of-elabela-a-novel-endogenous-ligand-of-apj-receptor
#4
REVIEW
Jin Xu, Linxi Chen, Zhisheng Jiang, Lanfang Li
The G protein-coupled receptor APJ and its cognate ligand, apelin, are widely expressed throughout human body. They are implicated in different key physiological processes such as angiogenesis, cardiovascular functions, fluid homeostasis and energy metabolism regulation. Recently, a new endogenous peptidic ligand of APJ, named Elabela, has been identified and shown to play a crucial role in embryonic development. In addition, increasing evidences show that Elabela is also intimate associated with a large number of physiological processes in adulthood...
January 19, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29349655/total-body-irradiation-tremendously-impair-the-proliferation-differentiation-and-chromosomal-integrity-of-bone-marrow-derived-mesenchymal-stromal-stem-cells
#5
Wen-Jyi Lo, Chiao-Lin Lin, Yu-Chien Chang, Li-Yuan Bai, Chen-Yuan Lin, Ji-An Liang, Long-Yuan Li, Ling-Min Chao, Chang-Fang Chiu, Chuan-Mu Chen, Su-Peng Yeh
Total body irradiation (TBI) is frequently used in hematopoietic stem cell transplantation (HSCT) and is associated with many complications due to radiation injury to the normal cells, including normal stem cells. Nevertheless, the effects of TBI on the mesenchymal stromal stem cell (MSC) are not fully understood. Bone marrow-derived MSCs (BM-MSCs) isolated from normal adults were irradiated with 200 cGy twice daily for consecutive 3 days, a regimen identical to that used in TBI-conditioning HSCT. The characteristics, differentiation potential, cytogenetics, hematopoiesis-supporting function, and carcinogenicity of the irradiated BM-MSCs were then compared to the non-irradiated control...
January 18, 2018: Annals of Hematology
https://www.readbyqxmd.com/read/29348641/refined-control-of-cell-stemness-allowed-animal-evolution-in-the-oxic-realm
#6
REVIEW
Emma U Hammarlund, Kristoffer von Stedingk, Sven Påhlman
Animal diversification on Earth has long been presumed to be associated with the increasing extent of oxic niches. Here, we challenge that view. We start with the fact that hypoxia (<1-3% O2) maintains cellular immaturity (stemness), whereas adult stem cells continuously-and paradoxically-regenerate animal tissue in oxygenated settings. Novel insights from tumour biology illuminate how cell stemness nevertheless can be achieved through the action of oxygen-sensing transcription factors in oxygenated, regenerating tissue...
January 18, 2018: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29348578/a-matter-of-life-and-death-stem-cell-survival-in-tissue-regeneration-and-tumour-formation
#7
REVIEW
Despina Soteriou, Yaron Fuchs
In recent years, great strides have been made in our understanding of how stem cells (SCs) govern tissue homeostasis and regeneration. The inherent longevity of SCs raises the possibility that the unique protective mechanisms in these cells might also be involved in tumorigenesis. In this Opinion article, we discuss how SCs are protected throughout their lifespan, focusing on quiescent behaviour, DNA damage response and programmed cell death. We briefly examine the roles of adult SCs and progenitors in tissue repair and tumorigenesis and explore how signals released from dying or dormant cells influence the function of healthy or aberrant SCs...
January 19, 2018: Nature Reviews. Cancer
https://www.readbyqxmd.com/read/29348441/sdf1-gradient-associates-with-the-distribution-of-c-kit-cardiac-cells-in-the-heart
#8
Outi Renko, Anna-Maria Tolonen, Jaana Rysä, Johanna Magga, Erja Mustonen, Heikki Ruskoaho, Raisa Serpi
Identification of the adult cardiac stem cells (CSCs) has offered new therapeutic possibilities for treating ischemic myocardium. CSCs positive for the cell surface antigen c-Kit are known as the primary source for cardiac regeneration. Accumulating evidence shows that chemokines play important roles in stem cell homing. Here we investigated molecular targets to be utilized in modulating the mobility of endogenous CSCs. In a four week follow-up after experimental acute myocardial infarction (AMI) with ligation of the left anterior descending (LAD) coronary artery of Sprague-Dawley rats c-Kit+ CSCs redistributed in the heart...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348130/setd1a-protects-hscs-from-activation-induced-functional-decline-in-vivo
#9
Kathrin Arndt, Andrea Kranz, Juliane Fohgrub, Adrien Jolly, Anita S Bledau, Michela Di Virgilio, Mathias Lesche, Andreas Dahl, Thomas Höfer, A Francis Stewart, Claudia Waskow
The regenerative capacity of hematopoietic stem cells (HSCs) is limited by the accumulation of DNA damage. Conditional mutagenesis of the histone 3 lysine 4 (H3K4) methyltransferase, Setd1a, revealed that it is required for the expression of DNA damage recognition and repair pathways in HSCs. Specific deletion of Setd1a in adult long-term (LT)-HSCs is compatible with adult life and has little effect on the maintenance of phenotypic LT-HSCs in the bone marrow. However, SETD1A-deficient LT-HSCs lose their transcriptional cellular identity accompanied by loss of their proliferative capacity and stem cell function under replicative stress in situ and after transplantation...
January 18, 2018: Blood
https://www.readbyqxmd.com/read/29348129/genomic-cdkn2a-2b-deletions-in-adult-ph-all-are-adverse-despite-allogeneic-stem-cell-transplantation
#10
Heike Pfeifer, Katharina Raum, Sandra Markovic, Verena Nowak, Stephanie Fey, Julia Obländer, Jovita Pressler, Verena Böhm, Monika Brüggemann, Lydia Wunderle, Andreas Hüttmann, Ralph Wäsch, Joachim Beck, Matthias Stelljes, Andreas Viardot, Fabian Lang, Dieter Hoelzer, Wolf-Karsten Hofmann, Hubert Serve, Christel Weiss, Nicola Goekbuget, Oliver G Ottmann, Daniel Nowak
We investigated the role of copy number alterations to refine risk stratification in adult Philadelphia chromosome positive (Ph)+ ALL treated with tyrosine kinase inhibitors (TKI) and allogeneic stem cell transplantation (aSCT). 97 Ph+ ALL patients (median age 41 years, range 18-64 years) within the prospective multicenter GMALL studies 06/99 (n=8) and 07/2003 (n=89) were analysed. All patients received TKI and aSCT in first complete remission (CR1). Copy number analysis was performed with SNP arrays and validated by multiplex ligation-dependent probe amplification (MLPA)...
January 18, 2018: Blood
https://www.readbyqxmd.com/read/29345390/wnt-%C3%AE-catenin-pathway-promotes-early-engraftment-of-fetal-hematopoietic-stem-progenitor-cells
#11
Edward O Kwarteng, Roxann Hétu-Arbour, Krista M Heinonen
The switch from fetal to adult hematopoietic stem/progenitor cells (HSPCs) is associated with profound changes in several genetic programs. Although HSPC ageing corresponds to alterations in Wnt signaling, relatively little is known about the relative roles of different Wnt signaling pathways in HSPC ontogeny. We hypothesized that proliferating fetal HSPCs would be more dependent on canonical β-catenin-dependent Wnt signaling when compared to quiescent adult bone marrow HSPCs. We have compared here Wnt signaling activities in murine fetal and adult HSPCs and demonstrate a shift from Wnt/β-catenin-dependent signaling in fetal liver HSPCs to more predominantly noncanonical Wnt/polarity signaling in adult HSPCs...
January 17, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29345324/autocrine-signals-increase-ovine-mesenchymal-stem-cells-migration-through-aquaporin-1-and-cxcr4-overexpression
#12
Alessandra Pelagalli, Anna Nardelli, Enrico Lucarelli, Antonella Zannetti, Arturo Brunetti
Sheep is a relevant large animal model that is frequently used to test innovative tissue engineering (TE) approaches especially for bone reconstruction. Mesenchymal stem cells (MSCs) are used in TE applications because they represent key component of adult tissue repair. Importantly, MSCs from different species show similar characteristics, which facilitated their application in translational studies using animal models. Nowadays, many researches are focusing on the use of ovine mesenchymal stem cells (oMSCs) in orthopedic preclinical settings for regenerative medicine purposes...
January 18, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29345024/being-pluripotent-bone-marrow-vsels-rather-than-hscs-have-the-potential-to-regenerate-other-adult-organs
#13
REVIEW
Deepa Bhartiya
Recent study by Deanne's group provides evidence that transplanted GFP positive bone marrow hematopoietic stem cells (HSCs) expressing CD45 do not regenerate the endometrium of irradiated mice. The results do not surprise us since global efforts to regenerate various organs by transplanting bone marrow (BM) mononuclear cells (presumably enriched for HSCs) have failed. HSCs can only regenerate/reconstitute BM as they are 'committed progenitors' that are specified from more primitive, CD45 negative stem cells...
January 18, 2018: Stem Cells
https://www.readbyqxmd.com/read/29344809/regeneration-of-functional-alveoli-by-adult-human-sox9-airway-basal-cell-transplantation
#14
Qiwang Ma, Yu Ma, Xiaotian Dai, Tao Ren, Yingjie Fu, Wenbin Liu, Yufei Han, Yingchuan Wu, Yu Cheng, Ting Zhang, Wei Zuo
Irreversible destruction of bronchi and alveoli can lead to multiple incurable lung diseases. Identifying lung stem/progenitor cells with regenerative capacity and utilizing them to reconstruct functional tissue is one of the biggest hopes to reverse the damage and cure such diseases. Here we showed that a rare population of SOX9+ basal cells (BCs) located at airway epithelium rugae can regenerate adult human lung. Human SOX9+ BCs can be readily isolated by bronchoscopic brushing and indefinitely expanded in feeder-free condition...
January 17, 2018: Protein & Cell
https://www.readbyqxmd.com/read/29344309/adult-stem-cells-in-vascular-remodeling
#15
REVIEW
Dong Wang, LeeAnn K Li, Tiffany Dai, Aijun Wang, Song Li
Understanding the contribution of vascular cells to blood vessel remodeling is critical for the development of new therapeutic approaches to cure cardiovascular diseases (CVDs) and regenerate blood vessels. Recent findings suggest that neointimal formation and atherosclerotic lesions involve not only inflammatory cells, endothelial cells, and smooth muscle cells, but also several types of stem cells or progenitors in arterial walls and the circulation. Some of these stem cells also participate in the remodeling of vascular grafts, microvessel regeneration, and formation of fibrotic tissue around biomaterial implants...
2018: Theranostics
https://www.readbyqxmd.com/read/29343975/spotlight-on-midostaurin-in-the-treatment-of-flt3-mutated-acute-myeloid-leukemia-and-systemic-mastocytosis-design-development-and-potential-place-in-therapy
#16
REVIEW
Ellen Weisberg, Martin Sattler, Paul W Manley, James D Griffin
The Fms-like tyrosine kinase-3 (FLT3; fetal liver kinase-2; human stem cell tyrosine kinase-1; CD135) is a class III receptor tyrosine kinase that is normally involved in regulating the proliferation, differentiation, and survival of both hematopoietic cells and dendritic cells. Mutations leading it to be constitutively activated make it an oncogenic driver in ~30% of acute myeloid leukemia (AML) patients where it is associated with poor prognosis. The prevalence of oncogenic FLT3 and the dependency on its constitutively activated kinase activity for leukemia growth make this protein an attractive target for therapeutic intervention...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29342143/regulation-of-embryonic-haematopoietic-multipotency-by-ezh1
#17
Linda T Vo, Melissa A Kinney, Xin Liu, Yuannyu Zhang, Jessica Barragan, Patricia M Sousa, Deepak K Jha, Areum Han, Marcella Cesana, Zhen Shao, Trista E North, Stuart H Orkin, Sergei Doulatov, Jian Xu, George Q Daley
All haematopoietic cell lineages that circulate in the blood of adult mammals derive from multipotent haematopoietic stem cells (HSCs). By contrast, in the blood of mammalian embryos, lineage-restricted progenitors arise first, independently of HSCs, which only emerge later in gestation. As best defined in the mouse, 'primitive' progenitors first appear in the yolk sac at 7.5 days post-coitum. Subsequently, erythroid-myeloid progenitors that express fetal haemoglobin, as well as fetal lymphoid progenitors, develop in the yolk sac and the embryo proper, but these cells lack HSC potential...
January 17, 2018: Nature
https://www.readbyqxmd.com/read/29341308/stiffness-regulates-the-proliferation-and-osteogenic-odontogenic-differentiation-of-human-dental-pulp-stem-cells-via-the-wnt-signalling-pathway
#18
Nanxin Liu, Mi Zhou, Qi Zhang, Tao Zhang, Taoran Tian, Quanquan Ma, Changyue Xue, Shiyu Lin, Xiaoxiao Cai
OBJECTIVES: Researches showed that stiffness of the extracellular matrix can affect the differentiation of many stem cells. Dental pulp stem cells (DPSCs) are a promising type of adult stem cell. However, we know little about whether and how the behaviour of DPSCs is influenced by stiffness. MATERIALS AND METHODS: We carried out a study that cultured DPSCs on tunable elasticity polydimethylsiloxane substrates to investigate the influence on morphology, proliferation, osteogenic/odontogenic differentiation and its possible mechanism...
January 17, 2018: Cell Proliferation
https://www.readbyqxmd.com/read/29339402/canonical-notch-signaling-is-dispensible-for-adult-steady-state-and-stress-myelo-erythropoiesis
#19
Sara Duarte, Petter S Woll, Natalija Buza-Vidas, Desmond Wai Loon Chin, Hanane Boukarabila, Tiago C Luís, Laura Stenson, Tiphaine Bouriez-Jones, Helen Ferry, Adam J Mead, Deborah Atkinson, Shaobo Jin, Sally-Ann Clark, Bishan Wu, Emmanouela Repapi, Nicki Gray, Stephen Taylor, Anders P Mutvei, Yat Long Tsoi, Claus Nerlov, Urban Lendahl, Sten Eirik W Jacobsen
While an essential role for canonical Notch signaling in generation of hematopoietic stem cells in the embryo and in thymic T cell development is well established, its role in adult bone marrow (BM) myelopoiesis remains unclear. Some studies, analyzing myeloid progenitors in adult mice with inhibited Notch signaling, implicated distinct roles of canonical Notch signaling in regulation of progenitors for the megakaryocyte, erythroid and granulocyte-macrophage cell lineages. However, these studies might also have targeted other pathways...
January 16, 2018: Blood
https://www.readbyqxmd.com/read/29338902/stage-specific-expression-of-ddx4-and-c-kit-at-different-developmental-stages-of-the-porcine-testis
#20
Ran Lee, Won-Young Lee, Hyun-Jung Park, Woo-Tae Ha, Jae-Seok Woo, Hak-Jae Chung, Ji-Heon Lee, Kwonho Hong, Hyuk Song
Spermatogenesis begins with spermatogonial stem cells (SSCs), which are located in the basement membrane of the adult testes. Previous studies have described specific biomarkers for undifferentiated porcine spermatogonia or SSCs; however, these markers are not sufficient to understand spermatogenesis at different developmental stages. The objective of this study was characterize the expression of DEAD-Box polypeptide 4 (DDX4, also known as VASA) and tyrosine-protein kinase kit (c-kit), as potential markers of male germ cells in the porcine testis...
December 30, 2017: Animal Reproduction Science
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