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Endothelium progenitor cell

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https://www.readbyqxmd.com/read/28333941/phenotypically-heterogeneous-podoplanin-expressing-cell-populations-are-associated-with-the-lymphatic-vessel-growth-and-fibrogenic-responses-in-the-acutely-and-chronically-infarcted-myocardium
#1
Maria Cimini, Antonio Cannatá, Gianandrea Pasquinelli, Marcello Rota, Polina Goichberg
Cardiac lymphatic vasculature undergoes substantial expansion in response to myocardial infarction (MI). However, there is limited information on the cellular mechanisms mediating post-MI lymphangiogenesis and accompanying fibrosis in the infarcted adult heart. Using a mouse model of permanent coronary artery ligation, we examined spatiotemporal changes in the expression of lymphendothelial and mesenchymal markers in the acutely and chronically infarcted myocardium. We found that at the time of wound granulation, a three-fold increase in the frequency of podoplanin-labeled cells occurred in the infarcted hearts compared to non-operated and sham-operated counterparts...
2017: PloS One
https://www.readbyqxmd.com/read/28302184/cytokine-free-directed-differentiation-of-human-pluripotent-stem-cells-efficiently-produces-hemogenic-endothelium-with-lymphoid-potential
#2
Yekaterina Galat, Svetlana Dambaeva, Irina Elcheva, Aaruni Khanolkar, Kenneth Beaman, Philip M Iannaccone, Vasiliy Galat
BACKGROUND: The robust generation of human hematopoietic progenitor cells from induced or embryonic pluripotent stem cells would be beneficial for multiple areas of research, including mechanistic studies of hematopoiesis, the development of cellular therapies for autoimmune diseases, induced transplant tolerance, anticancer immunotherapies, disease modeling, and drug/toxicity screening. Over the past years, significant progress has been made in identifying effective protocols for hematopoietic differentiation from pluripotent stem cells and understanding stages of mesodermal, endothelial, and hematopoietic specification...
March 17, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28299650/the-role-of-runx1-in-embryonic-blood-cell-formation
#3
Amanda D Yzaguirre, Marella F T R de Bruijn, Nancy A Speck
The de novo generation of hematopoietic stem and progenitor cells (HSPC) occurs solely during embryogenesis from a population of epithelial cells called hemogenic endothelium (HE). During midgestation HE cells in multiple intra- and extraembryonic vascular beds leave the vessel wall as they transition into HSPCs in a process termed the endothelial to hematopoietic transition (EHT). Runx1 expression in HE cells orchestrates the transcriptional switch necessary for the transdifferentiation of endothelial cells into functional HSPCs...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28286758/role-of-vitamin-d-in-uremic-vascular-calcification
#4
REVIEW
Yi-Chou Hou, Wen-Chih Liu, Cai-Mei Zheng, Jing-Quan Zheng, Tzung-Hai Yen, Kuo-Cheng Lu
The risk of cardiovascular death is 10 times higher in patients with CKD (chronic kidney disease) than in those without CKD. Vascular calcification, common in patients with CKD, is a predictor of cardiovascular mortality. Vitamin D deficiency, another complication of CKD, is associated with vascular calcification in patients with CKD. GFR decline, proteinuria, tubulointerstitial injury, and the therapeutic dose of active form vitamin D aggravate vitamin D deficiency and reduce its pleiotropic effect on the cardiovascular system...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28272478/erythro-myeloid-progenitors-can-differentiate-from-endothelial-cells-and-modulate-embryonic-vascular-remodeling
#5
Bahar Kasaai, Vincenza Caolo, Hanna M Peacock, Stephanie Lehoux, Elisa Gomez-Perdiguero, Aernout Luttun, Elizabeth A V Jones
Erythro-myeloid progenitors (EMPs) were recently described to arise from the yolk sac endothelium, just prior to vascular remodeling, and are the source of adult/post-natal tissue resident macrophages. Questions remain, however, concerning whether EMPs differentiate directly from the endothelium or merely pass through. We provide the first evidence in vivo that EMPs can emerge directly from endothelial cells (ECs) and demonstrate a role for these cells in vascular development. We find that EMPs express most EC markers but late EMPs and EMP-derived cells do not take up acetylated low-density lipoprotein (AcLDL), as ECs do...
March 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28271994/nkx2-5-marks-angioblasts-that-contribute-to-hemogenic-endothelium-of-the-endocardium-and-dorsal-aorta
#6
Lyad Zamir, Reena Singh, Elisha Nathan, Ralph Patrick, Oren Yifa, Yfat Yahalom-Ronen, Alaa A Arraf, Thomas M Schultheiss, Shengbao Suo, Jing-Dong Jackie Han, Guangdun Peng, Naihe Jing, Yuliang Wang, Nathan Palpant, Patrick Pl Tam, Richard P Harvey, Eldad Tzahor
Novel regenerative therapies may stem from deeper understanding of the mechanisms governing cardiovascular lineage diversification. Using enhancer mapping and live imaging in avian embryos, and genetic lineage tracing in mice, we investigated the spatio-temporal dynamics of cardiovascular progenitor populations. We show that expression of the cardiac transcription factor Nkx2.5 marks a mesodermal population outside of the cardiac crescent in the extraembryonic and lateral plate mesoderm, with characteristics of hemogenic angioblasts...
March 8, 2017: ELife
https://www.readbyqxmd.com/read/28243732/decreased-endothelial-progenitor-cells-epcs-and-increased-natural-killer-nk-cells-in-peripheral-blood-as-possible-early-markers-of-preeclampsia-a-case-control-analysis
#7
Antonio Simone Laganà, Domenico Giordano, Saverio Loddo, Giuseppe Zoccali, Salvatore Giovanni Vitale, Angelo Santamaria, Michele Buemi, Rosario D'Anna
PURPOSE: Endothelial Progenitor Cells (EPCs) and Natural Killer (NK) cells were recently advocates in the pathogenesis of preeclampsia (PE), since they can be mobilized into the bloodstream and may orchestrate vascular endothelium function. The aim of our study was to evaluate in early pregnancy circulating EPCs and NK cells in peripheral blood in women who later developed PE compared to uncomplicated pregnancies. METHODS: We prospectively enrolled pregnant women at 9(+0)-11(+6) weeks of gestation at the time of first-trimester integrated screening for trisomy 21, who underwent peripheral venous blood (20 mL) sample...
February 28, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28228349/identification-of-prdm-genes-in-human-corneal-endothelium
#8
Kostadin Rolev, G O'Donovan Dominic, Christiana Georgiou, Rajan Madhavan, Alexandra Chittka
Corneal endothelial cells (CECs) are essential for maintaining corneal stromal hydration and ensuring its transparency, which is necessary for normal vision. Dysfunction of CECs leads to stromal decompensation, loss of transparency and corneal blindness. Corneal endothelium has low proliferative potential compared to surface epithelial cells leading to poor regeneration of CEC following injury or age related decline in cellular density. The mechanisms which control proliferation and differentiation of neural crest derived CEC progenitors are yet to be clearly elucidated...
February 19, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28228072/curcumin-and-endothelial-function-evidence-and-mechanisms-of-protective-effects
#9
Maryam Saberi Karimian, Matteo Pirro, Thomas P Johnston, Muhammed Majeed, Amirhossein Sahebkar
BACKGROUND: The endothelium is a large paracrine organ regulating cell growth, vascular tone and thrombogenicity as well as platelet and leukocyte interactions. Endothelial function can be assessed by non-invasive techniques [e.g. flow-mediated vasodilation, nitroglycerin-mediated dilation and pulse wave velocity] and measuring specific circulating biomarkers [cell adhesion molecules, endothelial microparticles and endothelial progenitor cells]. Impaired endothelial function plays a key role in the development of atherosclerosis, arterial hypertension, heart failure, ischemia-reperfusion injury, Alzheimer's disease and other conditions...
February 22, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28187190/widespread-gli-expression-but-limited-canonical-hedgehog-signaling-restricted-to-the-ductular-reaction-in-human-chronic-liver-disease
#10
Candice Alexandra Grzelak, Nicholas David Sigglekow, Janina Elke Eleonore Tirnitz-Parker, Elizabeth Jane Hamson, Alessandra Warren, Bharvi Maneck, Jinbiao Chen, Bramilla Patkunanathan, Jade Boland, Robert Cheng, Nicholas Adam Shackel, Devanshi Seth, David Geoffrey Bowen, Luciano Gastón Martelotto, D Neil Watkins, Geoffrey William McCaughan
Canonical Hedgehog (Hh) signaling in vertebrate cells occurs following Smoothened activation/translocation into the primary cilia (Pc), followed by a GLI transcriptional response. Nonetheless, GLI activation can occur independently of the canonical Hh pathway. Using a murine model of liver injury, we previously identified the importance of canonical Hh signaling within the Pc+ liver progenitor cell (LPC) population and noted that SMO-independent, GLI-mediated signals were important in multiple Pc-ve GLI2+ intrahepatic populations...
2017: PloS One
https://www.readbyqxmd.com/read/28173870/an-effective-ex-vivo-approach-for-inducing-endothelial-progenitor-cells-from-umbilical-cord-blood-cd34-cells
#11
Meng Qin, Xin Guan, Huihui Wang, Yu Zhang, Bin Shen, Qingyu Zhang, Wei Dai, Yupo Ma, Yongping Jiang
BACKGROUND: Transplantation of endothelial progenitor cells (EPCs)/endothelial cells (ECs) has been used for the treatment of ischemic diseases and hemophilia A, due to their great capacity for producing factor VIII and for repairing vascular damage. We established an effective approach to stimulate the expansion and differentiation of EPCs for potential therapeutic applications. METHODS: CD34(+) cells isolated from human cord blood were cultured in a two-step system for 21 days...
February 7, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28163831/endothelial-progenitor-cells-exploring-the-pleiotropic-effects-of-statins
#12
REVIEW
Kully Sandhu, Mamas Mamas, Robert Butler
Statins have become a cornerstone of risk modification for ischaemic heart disease patients. A number of studies have shown that they are effective and safe. However studies have observed an early benefit in terms of a reduction in recurrent infarct and or death after a myocardial infarction, prior to any significant change in lipid profile. Therefore, pleiotropic mechanisms, other than lowering lipid profile alone, must account for this effect. One such proposed pleiotropic mechanism is the ability of statins to augment both number and function of endothelial progenitor cells...
January 26, 2017: World Journal of Cardiology
https://www.readbyqxmd.com/read/28150318/determine-exogenous-human-ddah2-gene-function-in-rabbit-bone-marrow-derived-endothelial-progenitor-cells-in-vitro
#13
Sara Shoeibi, Shabnam Mohammadi, Hamid Reza Sadeghnia, Elahe Mahdipour, Majid Ghayour-Mobarhan
The in vitro amplification of endothelial progenitor cells (EPCs) is an important method because of its role in gene transferring and regenerative medicine. In this study, we isolated rabbit bone marrow-derived EPCs to further manipulation and overexpression of dimethylarginine dimethylaminohydrolase (DDAH) in EPCs. Isolated EPCs were cultured, expanded in endothelial basal medium. Morphology of EPCs and expression levels of surface markers detected using immunocytochemistry staining and through the use of flow cytometery...
March 2017: Cell Biochemistry and Function
https://www.readbyqxmd.com/read/28100233/the-role-of-the-endothelium-in-asthma-and-chronic-obstructive-pulmonary-disease-copd
#14
REVIEW
Clara E Green, Alice M Turner
COPD and asthma are important chronic inflammatory disorders with a high associated morbidity. Much research has concentrated on the role of inflammatory cells, such as the neutrophil, in these diseases, but relatively little focus has been given to the endothelial tissue, through which inflammatory cells must transmigrate to reach the lung parenchyma and cause damage. There is evidence that there is an abnormal amount of endothelial tissue in COPD and asthma and that this tissue and its' progenitor cells behave in a dysfunctional manner...
January 18, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28090699/modelling-irf8-deficient-human-hematopoiesis-and-dendritic-cell-development-with-engineered-ips-cells
#15
Stephanie Sontag, Malrun Förster, Jie Qin, Paul Wanek, Saskia Mitzka, Herdit M Schüler, Steffen Koschmieder, Stefan Rose-John, Kristin Seré, Martin Zenke
Human induced pluripotent stem (iPS) cells can differentiate into cells of all three germ layers, including hematopoietic stem cells and their progeny. Interferon regulatory factor 8 (IRF8) is a transcription factor, which acts in hematopoiesis as lineage determining factor for myeloid cells, including dendritic cells (DC). Autosomal recessive or dominant IRF8 mutations occurring in patients cause severe monocytic and DC immunodeficiency. To study IRF8 in human hematopoiesis we generated human IRF8-/- iPS cells and IRF8-/- embryonic stem (ES) cells using RNA guided CRISPR/Cas9n genome editing...
January 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28043822/hemangioblast-hemogenic-endothelium-and-primitive-versus-definitive-hematopoiesis
#16
REVIEW
Georges Lacaud, Valerie Kouskoff
The types of progenitors generated during the successive stages of embryonic blood development are now fairly well characterized. The terminology used to describe these waves, however, can still be confusing. What is truly primitive? What is uniquely definitive? These questions become even more challenging to answer when blood progenitors are derived in vitro upon the differentiation of embryonic stem cells or induced pluripotent stem cells. Similarly, the cellular origin of these blood progenitors can be controversial...
December 30, 2016: Experimental Hematology
https://www.readbyqxmd.com/read/28004124/attenuation-of-neointimal-formation-with-netrin-1-and-netrin-1-preconditioned-endothelial-progenitor-cells
#17
Norika Mengchia Liu, Kin Lung Siu, Ji Youn Youn, Hua Cai
Restenosis after angioplasty is a serious clinical problem that can result in re-occlusion of the coronary artery. Although current drug-eluting stents have proved to be more effective in reducing restenosis, they have drawbacks of inhibiting reendothelialization to promote thrombosis. New treatment options are in urgent need. We have shown that netrin-1, an axon-guiding protein, promotes angiogenesis and cardioprotection via production of nitric oxide (NO). The present study examined whether and how netrin-1 attenuates neointimal formation in a femoral wire injury model...
December 21, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/27956903/comprehensive-screening-of-cell-surface-markers-expressed-by-adult-derived-human-liver-stem-progenitor-cells-harvested-at-passage-5-potential-implications-for-engraftment
#18
Pierre-Edouard Dollet, Joachim Ravau, Floriane André, Mustapha Najimi, Etienne Sokal, Catherine Lombard
Mesenchymal stromal cells (MSCs) are known to have potential therapeutic benefits for a number of diseases. However, many studies report low engraftment levels, regardless of the target organ. One possible explanation could be that MSCs do not express the necessary receptors for engraftment. Indeed, MSCs appear to use a similar mechanism to leukocytes to engraft into injured organs, relying on various receptors for rolling, firm adhesion, and transmigration. In this study, we conducted an extensive surface molecule screening of adult-derived human liver stem/progenitor cells (ADHLSC) in an attempt to shed some light on this subject...
2016: Stem Cells International
https://www.readbyqxmd.com/read/27955943/endothelium-in-the-pharyngeal-arches-3-4-and-6-is-derived-from-the-second-heart-field
#19
Xia Wang, Dongying Chen, Kelley Chen, Ali Jubran, AnnJosette Ramirez, Sophie Astrof
Oxygenated blood from the heart is directed into the systemic circulation through the aortic arch arteries (AAAs). The AAAs arise by remodeling of three symmetrical pairs of pharyngeal arch arteries (PAAs), which connect the heart with the paired dorsal aortae at mid-gestation. Aberrant PAA formation results in defects frequently observed in patients with lethal congenital heart disease. How the PAAs form in mammals is not understood. The work presented in this manuscript shows that the second heart field (SHF) is the major source of progenitors giving rise to the endothelium of the pharyngeal arches 3 - 6, while the endothelium in the pharyngeal arches 1 and 2 is derived from a different source...
January 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/27899395/functional-definition-of-progenitors-versus-mature-endothelial-cells-reveals-key-soxf-dependent-differentiation-process
#20
Jatin Patel, Elke J Seppanen, Mathieu P Rodero, Ho Yi Wong, Prudence Donovan, Zoltan Neufeld, Nicholas M Fisk, Mathias François, Kiarash Khosrotehrani
BACKGROUND: -During adult life, blood vessel formation is thought to occur via angiogenic processes involving branching from existing vessels. An alternate proposal suggests that neo-vessels form from endothelial progenitors able to assemble the intimal layers. We here aimed to define vessel-resident endothelial progenitors in vivo in a variety of tissues in physiological and pathological situations such as normal aorta, lungs, as well as wound healing, tumors and placenta. METHODS: -Based on protein expression levels of common endothelial markers using flow cytometry, three sub-populations of endothelial cells could be identified among VE-Cadherin+ and CD45- cells...
November 29, 2016: Circulation
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