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https://www.readbyqxmd.com/read/28634226/phostine-pst3-1a-targets-mgat5-and-inhibits-glioblastoma-initiating-cell-invasiveness-and-proliferation
#1
Zahra Hassani, Ali Saleh, Soumaya Turpault, Salim Khiati, Willy Morelle, Jacques Vignon, Jean-Philippe Hugnot, Emmanuelle Uro-Coste, Philippe Legrand, Marcel Delaforge, Séverine Loiseau, Ludovic Clarion, Marc Lecouvey, Jean-Noël Volle, David Virieux, Jean-Luc Pirat, Hugues Duffau, Norbert Bakalara
Glioblastoma multiforme (GBM) is the most common primary malignant brain tumor and accounts for a significant proportion of all primary brain tumors. Median survival after treatment is around 15 months. Remodeling of N-glycans by the N-acetylglucosamine glycosyltransferase (MGAT5) regulates tumoral development. Here, perturbation of MGAT5 enzymatic activity by the small-molecule inhibitor 3-Hydroxy-4,5-bis-benzyloxy-6-benzyloxymethyl-2-phenyl2-oxo-2λ5-[1,2]oxaphosphinane (PST3.1a) restrains GBM growth. In cell based assays it is demonstrated that PST3...
June 20, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28632811/management-of-poorly-controlled-indolent-systemic-mastocytosis-using-narrowband-uvb-phototherapy
#2
Zain Husain, Dylan Waterman, Kathleen Ellison, Jennifer A DeSimone
The mastocytoses comprise a group of proliferative stem cell disorders defined by the abnormal accumulation of mast cells (MCs) in the skin or other body tissues including the bone marrow, gastrointestinal tract, and liver. Systemic mastocytosis is defined by the presence of one major and one minor criterion or 3 minor criteria delineated by the World Health Organization (WHO). We present the case of a 57-year-old woman with a 10-year history of red-brown pruritic maculopapular lesions on the upper and lower extremities and trunk who was originally diagnosed with cutaneous mastocytosis...
May 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28628273/exposure-of-induced-pluripotent-stem-cell-derived-vascular-endothelial-and-smooth-muscle-cells-in-coculture-to-hemodynamics-induces-primary-vascular-cell-like-phenotypes
#3
Maria S Collado, Banumathi K Cole, Robert A Figler, Mark Lawson, David Manka, Michael B Simmers, Steve Hoang, Felipe Serrano, Brett R Blackman, Sanjay Sinha, Brian R Wamhoff
Human induced pluripotent stem cells (iPSCs) can be differentiated into vascular endothelial (iEC) and smooth muscle (iSMC) cells. However, because iECs and iSMCs are not derived from an intact blood vessel, they represent an immature phenotype. Hemodynamics and heterotypic cell:cell communication play important roles in vascular cell phenotypic modulation. Here we tested the hypothesis that hemodynamic exposure of iECs in coculture with iSMCs induces an in vivo-like phenotype. iECs and iSMCs were cocultured under vascular region-specific blood flow hemodynamics, and compared to hemodynamic cocultures of blood vessel-derived endothelial (pEC) and smooth muscle (pSMC) cells...
June 19, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28627605/mesenchymal-stem-cells-promote-endothelial-progenitor-cell-proliferation-by-secreting-insulin%C3%A2-like-growth-factor%C3%A2-1
#4
Jixue Hou, Xinyu Peng, Jing Wang, Hongwei Zhang, Jie Xia, Quanhu Ge, Xiaoyi Wang, Xueling Chen, Xiangwei Wu
Bone marrow mesenchymal stem cells (MSCs) and endothelial progenitor cells (EPCs) interact with each other. EPCs are able to promote the self‑renewal of MSCs as niche cells in murine bone marrow, and MSCs are able to promote EPC proliferation in vitro in a co‑culture system. It has previously been reported that MSCs can secrete insulin‑like growth factor‑1 (IGF‑1), which serves critical functions in EPC proliferation. However, the mechanism underlying the IGF‑1‑mediated proliferation of EPCs remains unclear...
June 9, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28626389/rac1-guides-porf-2-to-wnt-pathway-to-mediate-neural-stem-cell-proliferation
#5
Xi-Tao Yang, Guo-Hui Huang, Hong-Jiang Li, Zhao-Liang Sun, Nan-Jie Xu, Dong-Fu Feng
The molecular and cellular mechanisms underlying the anti-proliferative effects of preoptic regulator factor 2 (Porf-2) on neural stem cells (NSCs) remain largely unknown. Here, we found that Porf-2 inhibits the activity of ras-related C3 botulinum toxin substrate 1 (Rac1) protein in hippocampus-derived rat NSCs. Reduced Rac1 activity impaired the nuclear translocation of β-catenin, ultimately causing a repression of NSCs proliferation. Porf-2 knockdown enhanced NSCs proliferation but not in the presence of small molecule inhibitors of Rac1 or Wnt...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28625923/preliminary-identification-of-endometrial-cancer-stem-cells-in-vitro-and-in-vivo
#6
Fan-Fei Kong, Da Li, Hui Yang, Jian Ma, Xin Pan, Hong-Xiang Liu, Jia-Ning Huo, Xiao-Xin Ma
Stem cells play a critical role in endometrial cancer progression. However, the current methodologies used to isolate endometrial cancer stem cells (ECSCs) remain unsatisfactory. The ECSCs were isolated by serumfree suspension cultivation. The stem cells-related genes CD44, CD133, Oct4, Sox2 and Nanog were analyzed, and the biological behaviour of ECSCs was evaluated in vitro and vivo. The results suggest that (i) serumfree suspension cultivation is non-toxic and a convenient way for isolating the ECSCs, and is not limited to specific surface markers; (ii) Ishikawa cells can be used as an effective source of ECSCs, and the obtained ECSCs expressing the pluripotent stem cells markers CD44, CD133, Oct4, Sox2, and Nanog; (iii) ECSCs originated from Ishikawa cells showed an increased ability to invasion and metastasis in vitro, and exhibited a high proliferative capacity and pluripotency in vivo and vitro...
June 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28619624/fetal-stem-cell-and-gene-therapy
#7
REVIEW
Russell Witt, Tippi C MacKenzie, William H Peranteau
Advances in our understanding of stem cells, gene editing, prenatal imaging and fetal interventions have opened up new opportunities for the treatment of congenital diseases either through in-utero stem cell transplantation or in-utero gene therapy. Improvements in ultrasound-guided access to the fetal vasculature have also enhanced the safety and efficacy of cell delivery. The fetal environment offers accessible stem cell niches, localized cell populations with large proliferative potential, and an immune system that is able to acquire donor-specific tolerance...
June 12, 2017: Seminars in Fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28615219/zfp521-regulates-murine-hematopoietic-stem-cell-function-and-facilitates-mll-af9-leukemogenesis-in-mouse-and-human-cells
#8
Brian S Garrison, Adrian P Rybak, Isabel Beerman, Balthasar Heesters, Francois E Mercier, David T Scadden, David Bryder, Roland Baron, Derrick J Rossi
The concept that tumor-initiating cells can co-opt the self-renewal program of endogenous stem cells as a means of enforcing their unlimited proliferative potential is widely accepted, yet identification of specific factors that regulate self-renewal of normal and cancer stem cells remains limited. Using a comparative transcriptomic approach, we identify ZNF521/Zfp521 as a conserved hematopoietic stem cell (HSC)-enriched transcription factor in human and murine hematopoiesis, whose function in HSC biology remains elusive...
June 14, 2017: Blood
https://www.readbyqxmd.com/read/28611689/monitoring-notch-signaling-associated-activation-of-stem-cell-niches-within-injured-dental-pulp
#9
Thimios A Mitsiadis, Javier Catón, Pierfrancesco Pagella, Giovanna Orsini, Lucia Jimenez-Rojo
Dental pulp stem/progenitor cells guarantee tooth homeostasis, repair and regeneration throughout life. The decision between renewal and differentiation of these cells is influenced by physical and molecular interactions with stromal cells and extracellular matrix molecules forming the specialized microenvironment of dental pulp stem cell niches. Here we study the activation of putative pulp niches after tooth injury through the upregulation of Notch signaling pathway. Notch1, Notch2, and Notch3 molecules were used as markers of dental pulp stem/progenitor cells...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28611394/identification-of-the-ectoenzyme-cd38-as-a-marker-of-committed-preadipocytes
#10
A Carrière, Y Jeanson, J-A Côté, C Dromard, A Galinier, S Menzel, C Barreau, S Dupuis-Coronas, E Arnaud, A Girousse, V Cuminetti, J Paupert, B Cousin, C Sengenes, F Koch-Nolte, A Tchernof, L Casteilla
BACKGROUND/OBJECTIVES: Characterization of the adipocyte cellular lineage is required for a better understanding of white adipose tissue homeostasis and expansion. While several studies have focused on the phenotype of the most immature adipocyte progenitors, very few tools exist to identify committed cells. In haematopoiesis, the CD38 ectoenzyme is largely used to delineate various stages of stem cell lineage commitment. We hypothesize that this marker could be used to identify committed preadipocytes...
June 14, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28609015/wuschel-related-homeobox4-wox4-like-genes-regulate-cambial-cell-division-activity-and-secondary-growth-in-populus-trees
#11
Melis Kucukoglu, Jeanette Nilsson, Bo Zheng, Salma Chaabouni, Ove Nilsson
Plant secondary growth derives from the meristematic activity of the vascular cambium. In Arabidopsis thaliana, cell divisions in the cambium are regulated by the transcription factor WOX4, a key target of the CLAVATA3 (CLV3)/EMBRYO SURROUNDING REGION (ESR)-RELATED 41 (CLE41) signaling pathway. However, function of the WOX4-like genes in plants that are dependent on a much more prolific secondary growth, such as trees, remains unclear. Here, we investigate the role of WOX4 and CLE41 homologs for stem secondary growth in Populus trees...
June 13, 2017: New Phytologist
https://www.readbyqxmd.com/read/28607604/preferential-association-of-lissencephaly-1-gene-expression-with-cd133-glioblastoma-cells
#12
Felix Mircea Brehar, Anca Violeta Gafencu, Violeta Georgeta Trusca, Elena Valeria Fuior, Dorel Arsene, Mirela Amaireh, Andrei Giovani, Mircea Radu Gorgan
Lissencephaly-1 (Lis1) protein is a dynein-binding protein involved in neural stem cell division, morphogenesis and motility. To determine whether Lis1 is a key factor in glioblastoma, we evaluated its expression and function in CD133+ glioblastoma cells. Global, Lis1 gene expression is similar in glioblastoma and normal samples. Interestingly, immunohistochemistry data indicate increased Lis1 expression colocalized with CD133 in a subset of glioma cells, including the tumor cells with perivascular localization...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28607151/the-transcriptional-co-repressor-tle3-regulates-myogenic-differentiation-by-repressing-the-activity-of-the-myod-transcription-factor
#13
Shoichiro Kokabu, Chihiro Nakatomi, Takuma Matsubara, Yusuke Ono, William N Addison, Jonathan W Lowery, Mariko Urata, Aaron M Hudnall, Suzuro Hitomi, Mitsushiro Nakatomi, Tsuyoshi Sato, Kenji Osawa, Tetsuya Yoda, Vicki Rosen, Eijiro Jimi
Satellite cells are skeletal muscle stem cells that provide myonuclei for postnatal muscle growth, maintenance, and repair/regeneration in adults. Normally, satellite cells are mitotically quiescent, but they are activated in response to muscle injury, in which case they proliferate extensively and exhibit upregulated expression of the transcription factor MyoD, a master regulator of myogenesis. MyoD forms a heterodimer with E proteins through their basic helix-loophelix (bHLH) domain, binds to E boxes in the genome, and thereby activates transcription at muscle-specific promoters...
June 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28601640/functional-evidence-that-the-self-renewal-gene-nanog-regulates-esophageal-squamous-cancer-development
#14
Deng Li, Xiaocong Xiang, Fei Yang, Dongqin Xiao, Kang Liu, Zhu Chen, Ruolan Zhang, Gang Feng
Cancer cell molecular mimicry of stem cells (SC) follows with enhanced proliferative and renewal capacities. In support, numerous mediators of SC self-renewal have been evinced to exhibit oncogenic potential. More and more researches showed that the embryonic stem cell self-renewal genes express in various cancer cells. In this study, we sought to test the tumorigenic functions of NANOG, particularly, in esophageal cancer (EC). Using quantitative RT-PCR and western blotting, we confirmed that EC cells highly express NANOG mRNA and protein...
June 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28593575/the-role-of-herg1-ion-channels-in-epithelial-mesenchymal-transition-and-the-capacity-of-riluzole-to-reduce-cisplatin-resistance-in-colorectal-cancer-cells
#15
Angelo Fortunato
PURPOSE: The transition of cells from the epithelial to the mesenchymal state (EMT) plays an important role in tumor progression. EMT allows cells to acquire mobility, stem-like behavior and resistance to apoptosis and drug treatment. These features turn EMT into a central process in tumor biology. Ion channels are attractive targets for the treatment of cancer since they play critical roles in controlling a wide range of physiological processes that are frequently deregulated in cancer...
June 7, 2017: Cellular Oncology (Dordrecht)
https://www.readbyqxmd.com/read/28588699/irradiation-of-peripheral-blood-mononuclear-cells-with-7-5-gy-x-rays-prior-to-donor-lymphocyte-infusion-inhibits-proliferation-while-preserving-cytotoxicity-and-improves-the-effectiveness-of-hsct-in-patients-with-hematological-malignancies
#16
Yong-Qiu Wei, Xi-Nan Cen, Hui-Hui Liu, Yu-Hua Sun, Yong-Jin Shi, Wei Liu, Yu-Jun Dong, Han-Yun Ren
The aim of the present study was to explore the effect of different X-ray doses on the proliferation and cytotoxic activity of peripheral blood mononuclear cells (PBMCs), particularly lymphocytes, in order to assess whether this reduces the incidence of graft vs. host disease (GVHD) while preserving the graft vs. tumor (GVT) effect in patients with hematological malignancies following hematopoietic stem cell transplantation (HSCT). PBMCs from healthy donors were irradiated with X-rays at doses of 0, 2.5, 5, 7...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28587393/effects-of-hypoxia-on-differentiation-of-menstrual-blood-stromal-stem-cells-towards-tenogenic-cells-in-a-co-culture-system-with-achilles-tendon-cells
#17
Yijing Zheng, Yifei Zhou, Xiaolei Zhang, Yuemiao Chen, Xuhao Zheng, Tao Cheng, Chaonan Wang, Xuqi Hu, Jianjun Hong
Achilles tendons have a very poor capacity for intrinsic regeneration. The cell-based treatment strategy for Achilles tendinitis includes the application of mesenchymal stem cells (MSCs), which have high proliferative and multipotent differentiation ability, and is a promising approach. The aim of the present study was to explore the tenogenic potential of human menstrual blood stromal stem cells (MenSCs) in a co-culture system and to compare the tenogenic capability under normoxic and hypoxic conditions. MenSCs were co-cultured indirectly with Achilles tendon cells in a Transwell co-culture system for 1, 2, or 3 weeks in two different concentrations of oxygen (20 and 2% O2), whereas the control contained only MenSCs...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28587121/chemotherapeutic-drugs-dna-damage-and-repair-in-glioblastoma
#18
REVIEW
Laura Annovazzi, Marta Mellai, Davide Schiffer
Despite improvements in therapeutic strategies, glioblastoma (GB) remains one of the most lethal cancers. The presence of the blood-brain barrier, the infiltrative nature of the tumor and several resistance mechanisms account for the failure of current treatments. Distinct DNA repair pathways can neutralize the cytotoxicity of chemo- and radio-therapeutic agents, driving resistance and tumor relapse. It seems that a subpopulation of stem-like cells, indicated as glioma stem cells (GSCs), is responsible for tumor initiation, maintenance and recurrence and they appear to be more resistant owing to their enhanced DNA repair capacity...
May 26, 2017: Cancers
https://www.readbyqxmd.com/read/28584122/an-exportin-1-dependent-microrna-biogenesis-pathway-during-human-cell-quiescence
#19
Ivan Martinez, Karen E Hayes, Jamie A Barr, Abby D Harold, Mingyi Xie, Syed I A Bukhari, Shobha Vasudevan, Joan A Steitz, Daniel DiMaio
The reversible state of proliferative arrest known as "cellular quiescence" plays an important role in tissue homeostasis and stem cell biology. By analyzing the expression of miRNAs and miRNA-processing factors during quiescence in primary human fibroblasts, we identified a group of miRNAs that are induced during quiescence despite markedly reduced expression of Exportin-5, a protein required for canonical miRNA biogenesis. The biogenesis of these quiescence-induced miRNAs is independent of Exportin-5 and depends instead on Exportin-1...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28583178/therapeutic-angiogenesis-of-adipose-derived-stem-cells-for-ischemic-diseases
#20
REVIEW
Lina Zhao, Takerra Johnson, Dong Liu
Ischemic diseases, the leading cause of disability and death, are caused by the stenosis or obstruction of arterioles/capillaries that is not compensated for by vessel dilatation or collateral circulation. Angiogenesis is a complex process leading to new blood vessel formation and is triggered by ischemic conditions. Adequate angiogenesis, as a compensatory mechanism in response to ischemia, may increase oxygen and nutrient supplies to tissues and protect their function. Therapeutic angiogenesis has been the most promising therapy for treating ischemic diseases...
June 5, 2017: Stem Cell Research & Therapy
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