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https://www.readbyqxmd.com/read/28100488/kinetic-analyses-of-vasculogenesis-inform-mechanistic-studies
#1
Kaela M Varberg, Seth Winfree, Chenghao Chu, Wanzhu Tu, Emily K Blue, Cassandra R Gohn, Kenneth W Dunn, Laura S Haneline
Vasculogenesis is a complex process by which endothelial stem and progenitor cells undergo de novo vessel formation. Quantitative assessment of vasculogenesis is a central readout of endothelial progenitor cell (EPC) functionality. However, current assays lack kinetic measurements. To address this issue, new approaches were developed to quantitatively assess in vitro endothelial colony forming cell (ECFC) network formation in real time. Eight parameters of network structure were quantified using novel Kinetic Analysis of Vasculogenesis (KAV) software...
January 18, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28100035/stromal-cells-act-as-guardians-for-endothelial-progenitors-by-reducing-their-immunogenicity-after-co-transplantation
#2
Naima Souidi, Meaghan Stolk, Juliane Rudeck, Dirk Strunk, Katharina Schallmoser, Hans-Dieter Volk, Martina Seifert
Regeneration of injured tissues requires effective therapeutic strategies supporting vasculogenesis. The lack of instantly available autologous cell sources and immunogenicity of allogeneic endothelial (progenitor) cells limits clinical progress. Based on the immunosuppressive potency of mesenchymal strem/progenitor cells (MSCs), we investigated whether crosstalk between endothelial colony-forming progenitor cells (ECFCs) and MSCs during vasculogenesis could lower allogeneic T cell responses against ECFCs allowing long-term engraftment in vivo...
January 18, 2017: Stem Cells
https://www.readbyqxmd.com/read/28072843/chemokine-ligand-5-ccl5-derived-from-endothelial-colony-forming-cells-ecfcs-mediates-recruitment-of-smooth-muscle-progenitor-cells-spcs-toward-critical-vascular-locations-in-moyamoya-disease
#3
Ji Hoon Phi, Naoko Suzuki, Youn Joo Moon, Ae Kyung Park, Kyu-Chang Wang, Ji Yeoun Lee, Seung-Ah Choi, Sangjoon Chong, Reizo Shirane, Seung-Ki Kim
The etiology and pathogenesis of moyamoya disease (MMD) are still obscure. Previous studies indicated that angiogenic chemokines may play an important role in the pathogenesis of the disease. Recently, it was discovered that peripheral blood-derived endothelial colony-forming cells (ECFCs) and smooth muscle progenitor cells (SPCs) have defective functions in MMD patients. Therefore, the interaction of ECFCs and SPCs, the precursors of two crucial cellular components of vascular walls, with some paracrine molecules is an intriguing subject...
2017: PloS One
https://www.readbyqxmd.com/read/28045376/priming-of-endothelial-colony-forming-cells-in-a-mesenchymal-niche-improves-engraftment-and-vasculogenic-potential-by-initiating-mesenchymal-transition-orchestrated-by-notch-signaling
#4
Abbas Shafiee, Jatin Patel, Ho Yi Wong, Prudence Donovan, Dietmar W Hutmacher, Nicholas M Fisk, Kiarash Khosrotehrani
The prospect of using endothelial progenitors is currently hampered by their low engraftment upon transplantation. We report that mesenchymal stem/stromal cells (MSCs), independent of source and age, improve the engraftment of endothelial colony forming cells (ECFCs). MSC coculture altered ECFC appearance to an elongated mesenchymal morphology with reduced proliferation. ECFC primed via MSC contact had reduced self-renewal potential, but improved capacity to form tube structures in vitro and engraftment in vivo Primed ECFCs displayed major differences in transcriptome compared to ECFCs never exposed to MSCs, affecting genes involved in the cell cycle, up-regulating of genes influencing mesenchymal transition, adhesion, extracellular matrix...
October 24, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27966787/mesenchyme-homeobox-2-enhances-migration-of-endothelial-colony-forming-cells-exposed-to-intrauterine-diabetes-mellitus
#5
Cassandra R Gohn, Emily K Blue, BreAnn M Sheehan, Kaela M Varberg, Laura S Haneline
Diabetes mellitus (DM) during pregnancy has long-lasting implications for the fetus, including cardiovascular morbidity. Previously, we showed that endothelial colony forming cells (ECFCs) from DM human pregnancies have decreased vasculogenic potential. Here, we evaluate whether the molecular mechanism responsible for this phenotype involves the transcription factor, Mesenchyme Homeobox 2 (MEOX2). In human umbilical vein endothelial cells, MEOX2 upregulates cyclin dependent kinase inhibitor expression, resulting in increased senescence and decreased proliferation...
December 14, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27899144/hypoxia-induced-responses-by-endothelial-colony-forming-cells-are-modulated-by-placental-growth-factor
#6
Michelle B Hookham, Imran H A Ali, Christina L O'Neill, Emer Hackett, Melanie H Lambe, Tina Schmidt, Reinhold J Medina, Sara Chamney, Bharathi Rao, Eibhlin McLoone, David Sweet, Alan W Stitt, Derek P Brazil
BACKGROUND: Endothelial colony-forming cells (ECFCs), also termed late outgrowth endothelial cells, are a well-defined circulating endothelial progenitor cell type with an established role in vascular repair. ECFCs have clear potential for cell therapy to treat ischaemic disease, although the precise mechanism(s) underlying their response to hypoxia remains ill-defined. METHODS: In this study, we isolated ECFCs from umbilical cord blood and cultured them on collagen...
November 29, 2016: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/27879452/umbilical-cord-blood-circulating-progenitor-cells-and-endothelial-colony-forming-cells-are-decreased-in-preeclampsia
#7
Diane L Gumina, Claudine P Black, Vivek Balasubramaniam, Virginia D Winn, Christopher D Baker
Preeclampsia (PE) is a pregnancy-specific disease characterized by the new onset of hypertension and proteinuria. Mothers with PE are known to develop endothelial dysfunction, but its effect on infants has been understudied, as newborns are often asymptomatic. Recent studies indicate that infants born from preeclamptic pregnancies develop endothelial dysfunction including higher blood pressure during childhood and an increased risk of stroke later in life. We hypothesize that PE reduces the number and function of fetal angiogenic progenitor cells and may contribute to this increased risk...
November 21, 2016: Reproductive Sciences
https://www.readbyqxmd.com/read/27832737/oral-mucosa-harbors-a-high-frequency-of-endothelial-cells-a-novel-postnatal-cell-source-for-angiogenic-regeneration
#8
Jian Zhou, Jason H Rogers, Scott H Lee, DongMing Sun, Hai Yao, Jeremy J Mao, Kimi Y Kong
Endothelial progenitor cells/endothelial cells (EPCs/ECs) have great potential to treat pathological conditions such as cardiac infarction, muscle ischemia, and bone fractures, but isolation of EPC/ECs from existing cell sources is challenging due to their low EC frequency. We have isolated endothelial progenitor (EP)-like cells from rat oral mucosa and characterized their yield, immunophenotype, growth, and in vivo angiogenic potential. The frequency of EP-like cells derived from oral mucosa is thousands of folds higher than EPCs derived from donor-match bone marrow samples...
January 15, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/27709781/activation-of-atp-sensitive-potassium-channels-facilitates-the-function-of-human-endothelial-colony-forming-cells-via-ca-2-akt-enos-pathway
#9
Yan Wu, Meng-Yu He, Jian-Kui Ye, Shu-Ying Ma, Wen Huang, Yong-Yue Wei, Hui Kong, Hong Wang, Xiao-Ning Zeng, Wei-Ping Xie
Accumulating data, including those from our laboratory, have shown that the opening of ATP-sensitive potassium channels (KATP ) plays a protective role in pulmonary vascular diseases (PVD). As maintainers of the endothelial framework, endothelial colony-forming cells (ECFCs) are considered excellent candidates for vascular regeneration in cases of PVD. Although KATP openers (KCOs) have been demonstrated to have beneficial effects on endothelial cells, the impact of KATP on ECFC function remains unclear. Herein, this study investigated whether there is a distribution of KATP in ECFCs and what role KATP play in ECFC modulation...
October 6, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27668588/isolation-of-endothelial-colony-forming-cells-from-blood-samples-collected-from-the-jugular-and-cephalic-veins-of-healthy-adult-horses
#10
Ashley N Sharpe, Wen J Seeto, Randolph L Winter, Qiao Zhong, Elizabeth A Lipke, Anne A Wooldridge
OBJECTIVE To evaluate optimal isolation of endothelial colony-forming cells (ECFCs) from peripheral blood of horses. SAMPLE Jugular and cephalic venous blood samples from 17 adult horses. PROCEDURES Each blood sample was divided; isolation was performed with whole blood adherence (WBA) and density gradient centrifugation (DGC). Isolated cells were characterized by uptake of 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate-labeled acetylated low-density lipoprotein (DiI-Ac-LDL), vascular tubule formation, and expression of endothelial (CD34, CD105, vascular endothelial growth factor receptor-2, and von Willebrand factor) and hematopoietic (CD14) cell markers by use of indirect immunofluorescence assay (IFA) and flow cytometry...
October 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27650731/transfer-of-microrna-486-5p-from-human-endothelial-colony-forming-cell-derived-exosomes-reduces-ischemic-kidney-injury
#11
Jose L Viñas, Dylan Burger, Joseph Zimpelmann, Randa Haneef, William Knoll, Pearl Campbell, Alex Gutsol, Anthony Carter, David S Allan, Kevin D Burns
Administration of human cord blood endothelial colony-forming cells (ECFCs) or their exosomes protects mice against kidney ischemia/reperfusion injury. Here we studied the microRNA (miRNA) content of ECFC exosomes and the role of miRNA transfer in kidney and endothelial cell protection. ECFC exosomes were enriched in miR-486-5p, which targets the phosphatase and tensin homolog (PTEN) and the Akt pathway. In cultured endothelial cells exposed to hypoxia, incubation with ECFC exosomes increased miR-486-5p, decreased PTEN, and stimulated Akt phosphorylation...
December 2016: Kidney International
https://www.readbyqxmd.com/read/27634591/arachidonic-acid-evoked-ca-2-signals-promote-nitric-oxide-release-and-proliferation-in-human-endothelial-colony-forming-cells
#12
Estella Zuccolo, Silvia Dragoni, Valentina Poletto, Paolo Catarsi, Daniele Guido, Alessandra Rappa, Marta Reforgiato, Francesco Lodola, Dmitry Lim, Vittorio Rosti, Germano Guerra, Francesco Moccia
Arachidonic acid (AA) stimulates endothelial cell (EC) proliferation through an increase in intracellular Ca(2+) concentration ([Ca(2+)]i), that, in turn, promotes nitric oxide (NO) release. AA-evoked Ca(2+) signals are mainly mediated by Transient Receptor Potential Vanilloid 4 (TRPV4) channels. Circulating endothelial colony forming cells (ECFCs) represent the only established precursors of ECs. In the present study, we, therefore, sought to elucidate whether AA promotes human ECFC (hECFC) proliferation through an increase in [Ca(2+)]i and the following activation of the endothelial NO synthase (eNOS)...
December 2016: Vascular Pharmacology
https://www.readbyqxmd.com/read/27612088/unaltered-angiogenesis-regulating-activities-of-platelets-in-mild-type-2-diabetes-mellitus-despite-a-marked-platelet-hyperreactivity
#13
Xinyan Miao, Wei Zhang, Zhangsen Huang, Nailin Li
Type 2 diabetes mellitus (T2DM) is associated with platelet dysfunction and impaired angiogenesis. Aim of the study is to investigate if platelet dysfunction might hamper platelet angiogenic activities in T2DM patients. Sixteen T2DM patients and gender/age-matched non-diabetic controls were studied. Flow cytometry and endothelial colony forming cell (ECFC) tube formation on matrigel were used to assess platelet reactivity and angiogenic activity, respectively. Thrombin receptor PAR1-activating peptide (PAR1-AP) induced higher platelet P-selectin expression, and evoked more rapid and intense platelet annexin V binding in T2DM patients, seen as a more rapid increase of annexin V+ platelets (24...
2016: PloS One
https://www.readbyqxmd.com/read/27609786/epo-pretreatment-of-ecfcs-enhances-functional-recovery-after-transplantation-in-a-rat-model-of-cerebral-ischemia-through-an-increase-of-their-homing-abilities-a-spect-ct-study
#14
Philippe Garrigue, Guillaume Hache, Youssef Bennis, Pauline Brige, Jimmy Stalin, Lionel Pellegrini, Lionel Velly, Francesca Orlandi, Elena Castaldi, Françoise Dignat-George, Florence Sabatier, Benjamin Guillet
BACKGROUND: endothelial colony-forming cells (ECFCs) are promising candidates for cell therapy of ischemic diseases, as less than 10% of patients suffering from an ischemic stroke are eligible for thrombolysis. We previously reported that erythropoietin priming of ECFCs increased their in vitro and in vivo angiogenic properties in mice with hind limb ischemia. OBJECTIVE: the present study aimed to evaluate whether priming of ECFCs with erythropoietin could enhance their homing into the ischemic site after transient middle cerebral artery occlusion (MCAO) followed by reperfusion in rats and potentiate their protective or regenerative effects on brain-blood barrier disruption (BBBd), cerebral apoptosis and cerebral blood flow (CBF) by Single Photon Emission/Computed Tomography (SPECT/CT) imaging...
September 8, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27583252/endothelial-progenitor-cells-in-hematologic-malignancies
#15
REVIEW
Ugo Testa, Ernestina Saulle, Germana Castelli, Elvira Pelosi
Studies carried out in the last years have improved the understanding of the cellular and molecular mechanisms controlling angiogenesis during adult life in normal and pathological conditions. Some of these studies have led to the identification of some progenitor cells that sustain angiogenesis through indirect, paracrine mechanisms (hematopoietic angiogenic cells) and through direct mechanisms, i.e., through their capacity to generate a progeny of phenotypically and functionally competent endothelial cells [endothelial colony forming cells (ECFCs)]...
2016: Stem Cell Investigation
https://www.readbyqxmd.com/read/27426097/moderate-hypoxia-exhibits-increased-endothelial-progenitor-vessel-forming-ability-however-gestational-diabetes-caused-to-impede-compensatory-defense-reaction
#16
U Deniz Dincer
Endothelium represents a defense barrier and responds and integrates neuro humoral stimulus which describes as a compensatory mechanism. Endothelium formed with endothelial cells (ECs) and their progenitors. Endothelial progenitor cells (EPCs) represent minor subpopulation of mononuclear cells in the blood. During acute hypoxia, larger amount of EPCs mobilize into the peripheral blood and they directly contribute revascularization process. One of the subtypes of EPC is termed endothelial colony forming cells (ECFCs) which they possess de novo vessel-forming ability...
May 30, 2016: International Journal of Stem Cells
https://www.readbyqxmd.com/read/27381992/concise-review-functional-definition-of-endothelial-progenitor-cells-a-molecular-perspective
#17
Jatin Patel, Prudence Donovan, Kiarash Khosrotehrani
: : Since the discovery of endothelial progenitor cells (EPCs) almost 2 decades ago, there has been great hope in their use in treating chronic ischemic disease. Unfortunately, to date, many of the clinical trials using EPCs have been hampered by the lack of clear definition of this cell population. Attributes of a progenitor population are self-renewal and multipotentiality. Major progress has been achieved moving from a definition of EPCs based on a candidate cell surface molecule to a functional definition based essentially on self-renewal hierarchy of endothelial colony-forming cells (ECFCs)...
October 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/27338585/endothelial-progenitor-cells-are-differentially-impaired-in-anca-associated-vasculitis-compared-to-healthy-controls
#18
B Wilde, A Mertens, S J Arends, R P Rouhl, R Bijleveld, J Huitema, S A Timmermans, J Damoiseaux, O Witzke, A M Duijvestijn, P van Paassen, R J van Oostenbrugge, J W Cohen Tervaert
BACKGROUND: Endothelial progenitor cells (EPC) are of major importance in vascular repair under healthy circumstances. Vascular injury in need of repair occurs frequently in ANCA-associated vasculitis (AAV). A specialized T cell subset enhancing EPC function and differentiation has recently been described. These angiogenic T cells (Tang) may have an important impact on the vascular repair process. Therefore, the aim of our study was to investigate EPC and Tang in AAV. METHODS: Fifty-three patients suffering from AAV and 29 healthy controls (HC) were enrolled in our study...
2016: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/27297106/hyperglycemia-induced-patz1-negatively-modulates-endothelial-vasculogenesis-via-repression-of-fabp4-signaling
#19
Ren-An Chen, Xiao-Mian Sun, Chang-You Yan, Li Liu, Miao-Wang Hao, Qiang Liu, Xi-Ying Jiao, Ying-Min Liang
Vascular endothelial dysfunction, a central hallmark of diabetes, predisposes diabetic patients to numerous cardiovascular complications. The POZ/BTB and AT-hook-containing zinc finger protein 1 (PATZ1), is an important transcriptional regulatory factor and regulates divergent pathways depending on the cellular context, but its role in endothelial cells remains poorly understood. Herein, we report for the first time that endothelial PATZ1 expression was abnormally upregulated in diabetic endothelial cells (ECs) regardless of diabetes classification...
September 2, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27223433/tumor-tropic-endothelial-colony-forming-cells-ecfcs-loaded-with-near-infrared-sensitive-au-nanoparticles-a-cellular-stove-approach-to-the-photoablation-of-melanoma
#20
Giancarlo Margheri, Angela Zoppi, Roberto Olmi, Silvana Trigari, Rita Traversi, Mirko Severi, Daniele Bani, Francesca Bianchini, Eugenio Torre, Francesca Margheri, Anastasia Chillà, Alessio Biagioni, Lido Calorini, Anna Laurenzana, Gabriella Fibbi, Mario Del Rosso
In the photothermal treatments (PTs) of tumor, the localization of a high number of near-infrared (NIR) absorbing gold nanoparticles in the tumor mass is still a challenging issue. Here, we propose a promising strategy to deliver therapeutic chitosan-coated gold nanoparticles to tumor cells as hidden cargo of Endothelial Colony Forming Cells (ECFCs) endowed with an innate tumor-tropism. Remarkably, ECFC gold enrichement doesn't affect cell viability and preserves the endothelial lineage characteristics such as capillary morphogenesis and cell migration...
June 28, 2016: Oncotarget
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