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https://www.readbyqxmd.com/read/28469672/stemness-maintenance-properties-in-human-oral-stem-cells-after-long-term-passage
#1
Francesca Diomede, Thangavelu Soundara Rajan, Valentina Gatta, Marco D'Aurora, Ilaria Merciaro, Marco Marchisio, Aurelio Muttini, Sergio Caputi, Placido Bramanti, Emanuela Mazzon, Oriana Trubiani
Background. Neural crest-derived mesenchymal stem cells (MSCs) from human oral tissues possess immunomodulatory and regenerative properties and are emerging as a potential therapeutic tool to treat diverse diseases, such as multiple sclerosis, myocardial infarction, and connective tissue damages. In addition to cell-surface antigens, dental MSCs express embryonic stem cell markers as neural crest cells originate from the ectoderm layer. In vitro passages may eventually modify these embryonic marker expressions and other stemness properties, including proliferation...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28462489/role-of-maml1-and-meis1-in-esophageal-squamous-cell-carcinoma-depth-of-invasion
#2
Mohammad Reza Abbaszadegan, Meysam Moghbeli
Homeobox (HOX) transcription factors and NOTCH signaling pathway are critical regulators of stem cell functions, cell fate in development and homeostasis of gastrointestinal tissues. In the present study, we analyzed cross talk between NOTCH pathway and HOX genes through assessment of probable correlation betweenMAML1 and MEIS1 as the main transcription factor of NOTCH pathway and enhancer of HOX transcriptional machinery, respectively in esophageal squamous cell carcinoma (ESCC) patients. Fifty one ESCC cases were enrolled to assess the levels of Meis1 and Maml1 mRNA expression using real-time polymerase chain reaction (PCR)...
May 1, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28425489/meis1-variant-as-a-determinant-of-autonomic-imbalance-in-restless-legs-syndrome
#3
Jérôme Thireau, Charlotte Farah, Nicolas Molinari, Fabrice Bouilloux, Lucas Torreilles, Juliane Winkelmann, Sabine Scholz, Sylvain Richard, Yves Dauvilliers, Frédéric Marmigère
Restless Legs Syndrome (RLS) is a genetically complex neurological disorder in which overlapping genetic risk factors may contribute to the diversity and heterogeneity of the symptoms. The main goal of the study was to investigate, through analysis of heart rate variability (HRV), whether in RLS patients the MEIS1 polymorphism at risk influences the sympathovagal regulation in different sleep stages. Sixty-four RLS patients with periodic leg movement index above 15 per hour, and 38 controls underwent one night of video-polysomnographic recording...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28411381/pbx3-is-essential-for-leukemia-stem-cell-maintenance-in-mll-rearranged-leukemia
#4
Huidong Guo, Yajing Chu, Le Wang, Xing Chen, Yangpeng Chen, Hui Cheng, Lei Zhang, Yuan Zhou, Feng-Chun Yang, Tao Cheng, Mingjiang Xu, Xiaobing Zhang, Jianfeng Zhou, Weiping Yuan
Interaction of HOXA9/MEIS1/PBX3 is responsible for hematopoietic system transformation in MLL-rearranged (MLL-r) leukemia. Of these genes, HOXA9 has been shown to be critical for leukemia cell survival, while MEIS1 has been identified as an essential regulator for leukemia stem cell (LSC) maintenance. Although significantly high expression of PBX3 was observed in clinical acute myeloid leukemia (AML) samples, the individual role of PBX3 in leukemia development is still largely unknown. In this study, we explored the specific role of PBX3 and its associated regulatory network in leukemia progression...
July 15, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28399410/hoxa9-and-meis1-cooperatively-induce-addiction-to-syk-signaling-by-suppressing-mir-146a-in-acute-myeloid-leukemia
#5
Sebastian Mohr, Carmen Doebele, Federico Comoglio, Tobias Berg, Julia Beck, Hanibal Bohnenberger, Gabriela Alexe, Jasmin Corso, Philipp Ströbel, Astrid Wachter, Tim Beissbarth, Frank Schnütgen, Anjali Cremer, Nadine Haetscher, Stefanie Göllner, Arefeh Rouhi, Lars Palmqvist, Michael A Rieger, Timm Schroeder, Halvard Bönig, Carsten Müller-Tidow, Florian Kuchenbauer, Ekkehard Schütz, Anthony R Green, Henning Urlaub, Kimberly Stegmaier, R Keith Humphries, Hubert Serve, Thomas Oellerich
The transcription factor Meis1 drives myeloid leukemogenesis in the context of Hox gene overexpression but is currently considered undruggable. We therefore investigated whether myeloid progenitor cells transformed by Hoxa9 and Meis1 become addicted to targetable signaling pathways. A comprehensive (phospho)proteomic analysis revealed that Meis1 increased Syk protein expression and activity. Syk upregulation occurs through a Meis1-dependent feedback loop. By dissecting this loop, we show that Syk is a direct target of miR-146a, whose expression is indirectly regulated by Meis1 through the transcription factor PU...
April 10, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28396520/cytosine-modifications-modulate-the-chromatin-architecture-of-transcriptional-enhancers
#6
Elise A Mahé, Thierry Madigou, Aurélien A Sérandour, Maud Bizot, Stéphane Avner, Frédéric Chalmel, Gaëlle Palierne, Raphaël Métivier, Gilles Salbert
Epigenetic mechanisms are believed to play key roles in the establishment of cell-specific transcription programs. Accordingly, the modified bases 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) have been observed in DNA of genomic regulatory regions such as enhancers, and oxidation of 5mC into 5hmC by Ten Eleven Translocation (TET) proteins correlates with enhancer activation. However, the functional relationship between cytosine modifications and the chromatin architecture of enhancers remains elusive...
April 10, 2017: Genome Research
https://www.readbyqxmd.com/read/28334814/genome-wide-association-study-identifies-novel-susceptible-loci-and-highlights-wnt-beta-catenin-pathway-in-the-development-of-adolescent-idiopathic-scoliosis
#7
Zezhang Zhu, Leilei Xu, Nelson Leung-Sang Tang, Xiaodong Qin, Zhenhua Feng, Weixiang Sun, Weiguo Zhu, Benlong Shi, Peng Liu, Saihu Mao, Jun Qiao, Zhen Liu, Xu Sun, Fangcai Li, Jack Chun-Yiu Cheng, Yong Qiu
The genetic architecture of adolescent idiopathic scoliosis (AIS) remains poorly understood. Here we present the result of a 4-stage genome-wide association study composed of 5,953 AIS patients and 8,137 controls. Overall, we identified three novel susceptible loci including rs7593846 at 2p14 near MEIS1 (Pcombined = 1.19 × 10-13, OR = 1.21, 95% CI = 1.10-1.32), rs7633294 at 3p14.1 near MAGI1 (Pcombined = 1.85 × 10-12, OR = 1.20, 95% CI = 1.09-1.32), and rs9810566 at 3q26.2 near TNIK (Pcombined = 1...
April 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28329290/association-of-btbd9-and-map2k5-skor1-with-restless-legs-syndrome-in-chinese-population
#8
Gen Li, Huidong Tang, Cheng Wang, Xuemei Qi, Jie Chen, Shengdi Chen, Jianfang Ma
Study Objectives: The aim of the study was to investigate the relationship between genetic factors and primary restless legs syndrome (RLS) in Chinese population. Methods: A total of 116 RLS patients and 200 controls were recruited and the diagnosis of RLS was based on the criteria of International RLS Study Group. Polymer chain reaction (PCR) and sequencing were used to detect 19 single nucleotide polymorphisms (SNPs) in six genetic loci (MEIS1, BTBD9, PTPRD, MAP2K5/SKOR1, TOX3, and Intergenic region of 2p14)...
April 1, 2017: Sleep
https://www.readbyqxmd.com/read/28322463/a-tale-of-tale-prep1-pbx1-and-meis1-interconnections-and-competition-in-cancer
#9
REVIEW
Francesco Blasi, Chiara Bruckmann, Dmitry Penkov, Leila Dardaei
We report the latest structural information on PREP1 tumor suppressor, the specific "oncogene" and "tumor suppressive" signatures of MEIS1 and PREP1, the molecular rules regulating PREP1 and MEIS1 binding to DNA, and how these can change depending on the interaction with PBX1, cell-type, neoplastic transformation, and intracellular concentration. As both PREP1 and MEIS1 interact with PBX1 they functionally compete with each other. PREP1, PBX1, and MEIS1 TALE-class homeodomain transcription factors act in an interdependent and integrated way in experimental tumorigenesis...
March 21, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/28288143/dnmt3a-mutations-mediate-the-epigenetic-reactivation-of-the-leukemogenic-factor-meis1-in-acute-myeloid-leukemia
#10
H J Ferreira, H Heyn, M Vizoso, C Moutinho, E Vidal, A Gomez, A Martínez-Cardús, L Simó-Riudalbas, S Moran, E Jost, M Esteller
No abstract text is available yet for this article.
March 13, 2017: Oncogene
https://www.readbyqxmd.com/read/28270206/meis1-inhibits-clear-cell-renal-cell-carcinoma-cells-proliferation-and-in-vitro-invasion-or-migration
#11
Jie Zhu, Liang Cui, Axiang Xu, Xiaotao Yin, Fanglong Li, Jiangping Gao
BACKGROUND: Myeloid ecotropic viral integration site 1 (MEIS1) protein plays a synergistic causative role in acute myeloid leukemia (AML). However, MEIS1 has also shown to be a potential tumor suppressor in some other cancers, such as non-small-cell lung cancer (NSCLC) and prostate cancer. Although multiple roles of MEIS1 in cancer development and progression have been identified, there is an urgent demand to discover more functions of this molecule for further therapeutic design. METHODS: MEIS1 was overexpressed via adenovirus vector in clear cell renal cell carcinoma (ccRCC) cells...
March 7, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28236139/iron-dopamine-genetics-and-hormones-in-the-pathophysiology-of-restless-legs-syndrome
#12
REVIEW
Farhan H Khan, Caitlyn D Ahlberg, Christopher A Chow, Divya R Shah, Brian B Koo
Restless legs syndrome (RLS) is a common, chronic neurologic condition, which causes a persistent urge to move the legs in the evening that interferes with sleep. Human and animal studies have been used to study the pathophysiologic state of RLS and much has been learned about the iron and dopamine systems in relation to RLS. Human neuropathologic and imaging studies have consistently shown decreased iron in different brain regions including substantia nigra and thalamus. These same areas also demonstrate a state of relative dopamine excess...
February 24, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28229434/preclinical-pharmacokinetics-and-pharmacodynamics-of-pinometostat-epz-5676-a-first-in-class-small-molecule-s-adenosyl-methionine-competitive-inhibitor-of-dot1l
#13
Nigel J Waters
Acute leukemias bearing mixed lineage leukemia (MLL) rearrangements are aggressive diseases characterized by a poor overall prognosis despite multi-agent chemotherapy. Aberrant fusion proteins involving the MLL histone methyltransferase (HMT) lead to recruitment of DOT1L, to a multi-protein complex resulting in aberrant methylation of histone H3 lysine 79 at MLL target genes, and ultimately enhanced expression of critical genes for hematopoietic differentiation, including HOXA9 and MEIS1, and as such defines the established mechanism for leukemogenesis in MLL-rearrangement (MLL-r) leukemias...
February 22, 2017: European Journal of Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28202494/fumarate-hydratase-is-a-critical-metabolic-regulator-of-hematopoietic-stem-cell-functions
#14
Amelie V Guitart, Theano I Panagopoulou, Arnaud Villacreces, Milica Vukovic, Catarina Sepulveda, Lewis Allen, Roderick N Carter, Louie N van de Lagemaat, Marcos Morgan, Peter Giles, Zuzanna Sas, Marta Vila Gonzalez, Hannah Lawson, Jasmin Paris, Joy Edwards-Hicks, Katrin Schaak, Chithra Subramani, Deniz Gezer, Alejandro Armesilla-Diaz, Jimi Wills, Aaron Easterbrook, David Coman, Chi Wai Eric So, Donal O'Carroll, Douglas Vernimmen, Neil P Rodrigues, Patrick J Pollard, Nicholas M Morton, Andrew Finch, Kamil R Kranc
Strict regulation of stem cell metabolism is essential for tissue functions and tumor suppression. In this study, we investigated the role of fumarate hydratase (Fh1), a key component of the mitochondrial tricarboxylic acid (TCA) cycle and cytosolic fumarate metabolism, in normal and leukemic hematopoiesis. Hematopoiesis-specific Fh1 deletion (resulting in endogenous fumarate accumulation and a genetic TCA cycle block reflected by decreased maximal mitochondrial respiration) caused lethal fetal liver hematopoietic defects and hematopoietic stem cell (HSC) failure...
March 6, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28054140/meis1-is-critical-to-the-maintenance-of-human-acute-myeloid-leukemia-cells-independent-of-mll-rearrangements
#15
Jiangying Liu, Ya-Zhen Qin, Shenmiao Yang, Yazhe Wang, Ying-Jun Chang, Ting Zhao, Qian Jiang, Xiao-Jun Huang
Although the outcome of patients with acute myeloid leukemia (AML) has improved by optimized chemotherapy regimens and bone marrow transplantation, leukemia relapse remains one of the most challenging problems during therapy. Sustained existence of AML blasts is a fundamental determinant for the development of leukemia and resistance to therapy. Recent evidences suggest that Meis1 is tightly associated with the self-renewal capacity of normal hematopoietic stem cells. Meis1 was also found to be essential for the development of mixed lineage leukemia (MLL)-rearranged leukemia...
April 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28049638/leukemic-blasts-program-bone-marrow-adipocytes-to-generate-a-protumoral-microenvironment
#16
Manar S Shafat, Thomas Oellerich, Sebastian Mohr, Stephen D Robinson, Dylan R Edwards, Christopher R Marlein, Rachel E Piddock, Matthew Fenech, Lyubov Zaitseva, Amina Abdul-Aziz, Jeremy Turner, Johnathan A Watkins, Matthew Lawes, Kristian M Bowles, Stuart A Rushworth
Despite currently available therapies, most patients diagnosed with acute myeloid leukemia (AML) die of their disease. Tumor-host interactions are critical for the survival and proliferation of cancer cells; accordingly, we hypothesize that specific targeting of the tumor microenvironment may constitute an alternative or additional strategy to conventional tumor-directed chemotherapy. Because adipocytes have been shown to promote breast and prostate cancer proliferation, and because the bone marrow adipose tissue accounts for up to 70% of bone marrow volume in adult humans, we examined the adipocyte-leukemia cell interactions to determine if they are essential for the growth and survival of AML...
March 9, 2017: Blood
https://www.readbyqxmd.com/read/27992416/genome-wide-association-analyses-of-sleep-disturbance-traits-identify-new-loci-and-highlight-shared-genetics-with-neuropsychiatric-and-metabolic-traits
#17
Jacqueline M Lane, Jingjing Liang, Irma Vlasac, Simon G Anderson, David A Bechtold, Jack Bowden, Richard Emsley, Shubhroz Gill, Max A Little, Annemarie I Luik, Andrew Loudon, Frank A J L Scheer, Shaun M Purcell, Simon D Kyle, Deborah A Lawlor, Xiaofeng Zhu, Susan Redline, David W Ray, Martin K Rutter, Richa Saxena
Chronic sleep disturbances, associated with cardiometabolic diseases, psychiatric disorders and all-cause mortality, affect 25-30% of adults worldwide. Although environmental factors contribute substantially to self-reported habitual sleep duration and disruption, these traits are heritable and identification of the genes involved should improve understanding of sleep, mechanisms linking sleep to disease and development of new therapies. We report single- and multiple-trait genome-wide association analyses of self-reported sleep duration, insomnia symptoms and excessive daytime sleepiness in the UK Biobank (n = 112,586)...
February 2017: Nature Genetics
https://www.readbyqxmd.com/read/27918583/the-gene-regulatory-network-of-lens-induction-is-wired-through-meis-dependent-shadow-enhancers-of-pax6
#18
Barbora Antosova, Jana Smolikova, Lucie Klimova, Jitka Lachova, Michaela Bendova, Iryna Kozmikova, Ondrej Machon, Zbynek Kozmik
Lens induction is a classical developmental model allowing investigation of cell specification, spatiotemporal control of gene expression, as well as how transcription factors are integrated into highly complex gene regulatory networks (GRNs). Pax6 represents a key node in the gene regulatory network governing mammalian lens induction. Meis1 and Meis2 homeoproteins are considered as essential upstream regulators of Pax6 during lens morphogenesis based on their interaction with the ectoderm enhancer (EE) located upstream of Pax6 transcription start site...
December 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27795845/epigenetics-of-ancient-dna
#19
S V Zhenilo, A S Sokolov, E B Prokhortchouk
Initially, the study of DNA isolated from ancient specimens had been based on the analysis of the primary nucleotide sequence. This approach has allowed researchers to study the evolutionary changes that occur in different populations and determine the influence of the environment on genetic selection. However, the improvement of methodological approaches to genome-wide analysis has opened up new possibilities in the search for the epigenetic mechanisms involved in the regulation of gene expression. It was discovered recently that the methylation status of the regulatory elements of the HOXD cluster and MEIS1 gene changed during human evolution...
July 2016: Acta Naturae
https://www.readbyqxmd.com/read/27748908/cardioprotective-potential-of-dendrobium%C3%A2-officinale-kimura-et-migo-against-myocardial-ischemia-in-mice
#20
Meng-Meng Dou, Zhi-Hao Zhang, Zhu-Bo Li, Jie Zhang, Xiao-Yan Zhao
Dendrobium officinale Kimura et Migo has been used for thousands of years to promote body fluid production; however, little is currently known regarding its effects on the heart. The present study aimed to explore the cardioprotective potential of the water extract of Dendrobium officinale Kimura et Migo (DOE) on myocardial ischemia in mice. A mouse model of myocardial ischemia was induced following ligation of the left anterior descending coronary artery. Prior to the operation, mice were administered a vehicle or DOE for 2 weeks...
November 2016: Molecular Medicine Reports
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