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Endothelial progenitor cells

Roberto Negro, Eupremio Luigi Greco, Giacomo Greco
AIM: We investigated the effect of alogliptin and gliclazide on endothelial progenitor cells (EPCs) in type 2 diabetes. METHODS: Eighty patients with type 2 diabetes and HbA1c between 7.5% and 8.5% were randomized to receive either alogliptin (25 mg/daily) or gliclazide extended-release (30 mg/daily for HbA1c 7.5-8.0% and 60 mg/daily for HbA1c 8.0-8.5%) in combination with metformin for 4 months. At baseline and 4 months, clinical and laboratory parameters of EPCs were determined...
March 20, 2018: Experimental and Clinical Endocrinology & Diabetes
Masashi Sakuma, Takahisa Nasuno, Shichiro Abe, Syotaro Obi, Shigeru Toyoda, Isao Taguchi, Ryoichi Sohma, Ken-Ichi Inoue, Setsu Nishino, Koichi Node, Guiherme Attizzani, Hiram Bezerra, Marco Costa, Daniel Simon, Teruo Inoue
Background: Bone marrow-derived progenitor cells likely contribute to both endothelial- and smooth muscle cell-dependent healing responses in stent-injured vessel sites. This study aimed to assess mobilization of progenitor cells and vessel healing after zotarolimus-eluting (ZES) and everolimus-eluting (EES) stents. Methods and results: In 63 patients undergoing coronary stent implantation, we measured circulating CD34 + CD133 + CD45low cells and serum levels of biomarkers relevant to stem cell mobilization...
March 2018: IJC Heart & Vasculature
Luminita Labusca, Florin Zugun-Eloae
Intra-articular adipose tissue deposits known as articular fat pads (AFPs) are described to exist within synovial joints. Their assumed role in normal joint biomechanics is increasingly objectivized by means of advanced methods of functional imaging. AFPs possess structural similarity with body subcutaneous white adipose tissue (WAT), however, seems to be regulated by independent metabolic loops. AFP dimension are conserved during extreme WAT states: obesity, metabolic syndrome, lipodystrophy, and cachexia...
2018: Frontiers in Veterinary Science
Mitchell Kuss, Jiyoung Kim, Dianjun Qi, Shaohua Wu, Yuguo Lei, Soonkyu Chung, Bin Duan
Obesity and its related health complications cause billions of dollars in healthcare costs annually in the United States, and there are yet to be safe and long-lasting anti-obesity approaches. Using brown adipose tissue (BAT) is a promising approach, as it uses fats for energy expenditure. However, the effect of the microenvironment on human thermogenic brown adipogenesis and how to generate clinically relevant sized and functioning BAT are still unknown. In our current study, we evaluated the effects of endothelial growth medium exposure on brown adipogenesis of human brown adipose progenitors (BAP)...
March 16, 2018: Acta Biomaterialia
Nuno Couto, Sergio Caja Galán, Joana Maia, Maria Carolina Strano Moraes, Bruno Costa-Silva
Oncologic diseases do not behave as isolated entities. Instead, they are based on complex systemic networks involving cell-cell communication between cancerous and healthy cells of the host, which may either facilitate or prevent cancer progression. In addition to cell-cell contacts, cells communicate through secreted factors in a process modulated by ligand concentration, receptor availability and synergy amongst several signaling circuits. Of these secreted factors, exosomes, 30 to 150 nm membrane vesicles of endocytic origin released by virtually all cells, have emerged as important cell-cell communication players both in physiological and pathological scenarios by being carriers of all the main biomolecules, including lipids, proteins, DNAs, messenger RNAs and microRNA, and performing intercellular transfer of components, locally and systemically...
March 16, 2018: Biochimie
Jiayin Fu, Dong-An Wang
Other than a few avascular tissues, almost all human tissues are connected to the systemic circulation via blood vessels that promote metabolism and function. Accordingly, engineered vascularization is a vital goal in tissue engineering for regenerative medicine. Endothelial cells (ECs) play a central role in vascularization with two significant specificities: physical interfaces between vascular stroma and blood, and phenotypic organ-specificity. Biomaterial scaffolding technologies that address these unique properties of ECs have been developed to promote the vascularization of various engineered tissues, and these have advanced from mimicking vascular architectures ex situ towards promoting spontaneous angiogenic remodeling in situ...
March 16, 2018: Trends in Biotechnology
Isabelle Bergiers, Tallulah Andrews, Özge Vargel Bölükbaşı, Andreas Buness, Ewa Janosz, Natalia Lopez-Anguita, Kerstin Ganter, Kinga Kosim, Cemre Celen, Gülce Itır Perçin, Paul Collier, Bianka Baying, Vladimir Benes, Martin Hemberg, Christophe Lancrin
Recent advances in single-cell transcriptomics techniques have opened the door to the study of gene regulatory networks (GRNs) at the single-cell level. Here, we studied the GRNs controlling the emergence of hematopoietic stem and progenitor cells from mouse embryonic endothelium using a combination of single-cell transcriptome assays. We found that a heptad of transcription factors (Runx1, Gata2, Tal1, Fli1, Lyl1, Erg and Lmo2) is specifically co-expressed in an intermediate population expressing both endothelial and hematopoietic markers...
March 20, 2018: ELife
A Ahluwalia, M K Jones, I Brzozowska, A S Tarnawski
Regeneration of blood vessels (neovascularization) is critical for tissue injury healing. The contribution of bone marrow-derived endothelial progenitor cells (BMD-EPCs) to neovascularization during tissue injury healing is not fully elucidated and it is not clear whether BMD-EPCs can form new capillary blood vessels independently or jointly with fully differentiated endothelial cells (ECs). The aim of this study was to establish an in vitro model of vasculogenesis/angiogenesis by co-culture of BMD-EPCs and gastric endothelial cells (GECs) on Matrigel, examine direct interactions of these cells; and, identify the mechanisms involved...
December 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
Anton G Kutikhin, Maxim Yu Sinitsky, Arseniy E Yuzhalin, Elena A Velikanova
The blood flow through vessels produces a tangential, or shear, stress sensed by their innermost layer (i.e., endothelium) and representing a major hemodynamic force. In humans, endothelial repair and blood vessel formation are mainly performed by circulating endothelial progenitor cells (EPCs) characterized by a considerable expression of vascular endothelial growth factor receptor 2 (VEGFR2), CD34, and CD133, pronounced tube formation activity in vitro, and strong reendothelialization or neovascularization capacity in vivo...
March 13, 2018: Journal of Molecular and Cellular Cardiology
Xin Deng, Wen Zhao, Laijun Song, Wei Ying, Xinbin Guo
Glioma is one of the most common aggressive neuroepithelial malignant tumors in the central nervous system. It has a high recurrence rate and poor prognosis, primarily due to the fact that novel therapeutic agents cannot penetrate the blood-brain barrier (BBB). Endothelial progenitor cells (EPCs) have been reported to move across the BBB and access the tumor site. However, whether EPCs expressing the tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induce glioma cell apoptosis requires further investigation...
April 2018: Oncology Letters
Jie Gao, Gang Zhao, Wei Li, Jiayuan Zhang, Yanling Che, Meiyu Song, Shan Gao, Bin Zeng, Yuanhong Wang
Endothelial progenitor cells (EPCs) are involved in diabetes-associated complications, including diabetic foot ulcer (DFU). Recent reports showed that miR-155 downregulation promotes wound healing in diabetic rats and ameliorates endothelial injury induced by high glucose, but its role in DFU is unknown. We found that miR-155 was overexpressed in EPCs from patients with DFU and in high glucose-induced EPCs from healthy people. Reductions in cell viability, migration, tube formation and nitric oxide production, as well as increases in lactated hydrogenase, cell apoptosis, and reactive oxygen species induced by high glucose, were enhanced by miR-155 overexpression and restrained by miR-155 inhibition...
March 12, 2018: Experimental Cell Research
Alborz Karimzadeh, Vanessa M Scarfone, Erika Varady, Connie Chao, Karin Grathwohl, John W Fathman, David A Fruman, Thomas Serwold, Matthew A Inlay
Hematopoietic stem cells (HSCs) are the self-renewing multipotent progenitors to all blood cell types. Identification and isolation of HSCs for study has depended on the expression of combinations of surface markers on HSCs that reliably distinguish them from other cell types. However, the increasing number of markers required to isolate HSCs has made it tedious, expensive, and difficult for newcomers, suggesting the need for a simpler panel of HSC markers. We previously showed that phenotypic HSCs could be separated based on expression of CD11a and that only the CD11a negative fraction contained true HSCs...
March 15, 2018: Stem Cells Translational Medicine
Mario Lopez-Moya, Pedro Melgar-Lesmes, Kumaran Kolandaivelu, Jose Maria de la Torre Hernandez, Elazer R Edelman, Mercedes Balcells
Porcine glutaraldehyde-fixed pericardium is widely used to replace human heart valves. Despite the stabilizing effects of glutaraldehyde fixation, the lack of endothelialization and the occurrence of immune reactions contribute to calcification and structural valve deterioration, which is particularly significant in young patients where valve longevity is crucial. This report shows an optimization system to enhance endothelialization of fixed pericardium to mimic the biological function of a native heart valve...
March 14, 2018: Biomacromolecules
Vivek Krishna Pulakazhi Venu, Mahmoud Saifeddine, Koichiro Mihara, Mahmoud El-Daly, Darrell Belke, Jonathan L E Dean, Edward R O'Brien, Simon A Hirota, Morley D Hollenberg
BACKGROUND AND PURPOSE: Previously, we demonstrated that exogenous Heat Shock Protein 27 (HSP27/gene, HSPB1) treatment of human endothelial progenitor cells (EPCs) increases the synthesis and secretion of VEGF, improves EPC-migration/re-endothelialization and decreases neo-intima formation, suggesting a role for HSPB1 in regulating EPC function. We hypothesized that HSPB1 could also affect mature endothelial cells (ECs) to alter EC-mediated vasoreactivity in vivo. Our work focused on eNOS/NO-dependent relaxation caused by acetylcholine and the coagulation pathway-activated receptor, proteinase-activated receptor-2 (PAR2)...
March 12, 2018: British Journal of Pharmacology
Lai-Ling Du, Zhida Shen, Zhengwei Li, Xuewei Ye, Meiping Wu, Lihui Hong, Yanbo Zhao
Endothelial progenitor cells (EPCs) promote angiogenesis and play a pivotal role in endothelial repair and re-endothelialization after vascular injury. Transient receptor potential-canonical1 (TRPC1) has been recently implied to play important roles on EPC function. Here, we studied the role of TRPC1 in regulating EPC function in vivo and in vitro. EPCs were cultured from TRPC1-knockout mice and their controls. In vitro, TRPC1 knockout reduced EPC functional activities, including migration and tube formation...
March 12, 2018: Journal of Cardiovascular Translational Research
Karen L Price, Maria Kolatsi-Joannou, Chiara Mari, David A Long, Paul J D Winyard
Kidney function is directly linked to the number of nephrons which are generated until 32-36 weeks gestation in humans. Failure to make nephrons during development leads to congenital renal malformations, whilst nephron loss in adulthood occurs in progressive renal disease. Therefore, an understanding of the molecular processes which underlie human nephron development may help design new treatments for renal disease. Mesenchyme to epithelial transition (MET) is critical for forming nephrons, and molecular pathways which control rodent MET have been identified...
December 2018: Cell Death Discovery
Friederike Remm, Nicolle Kränkel, Daniela Lener, Daniel J Drucker, Sieghart Sopper, Christoph Brenner
Introduction: DPP4 inhibitors (gliptins) are commonly used antidiabetic drugs for the treatment of type 2 diabetes. Gliptins also act in a glucose-independent manner and show vasoregenerative effects. We have shown that gliptins can remarkably accelerate vascular healing after vascular injury. However, the underlying mechanisms remain unclear. Here, we examined potential signaling pathways linking gliptins to enhanced endothelial regeneration. Methods and Results: We used wild-type and GLP1 receptor knockout ( Glp1r -/- ) mice to investigate the underlying mechanisms of gliptin-induced reendothelialization...
2018: Stem Cells International
Michael Lie-A-Ling, Elli Marinopoulou, Andrew J Lilly, Mairi Challinor, Rahima Patel, Christophe Lancrin, Valerie Kouskoff, Georges Lacaud
During ontogeny, hematopoietic stem and progenitor cells arise from hemogenic endothelium through an endothelial-to-hematopoietic transition that is strictly dependent on the transcription factor RUNX1. Although it is well established that RUNX1 is essential for the onset of hematopoiesis, little is known about the role of RUNX1 dosage specifically in hemogenic endothelium and during the endothelial-to-hematopoietic transition. Here, we used the mouse embryonic stem cell differentiation system to determine if and how RUNX1 dosage affects hemogenic endothelium differentiation...
March 12, 2018: Development
Antonella Cotoia, Lucia Mirabella, Sabrina Altamura, Rachele Villani, Flavia Marchese, Giuseppe Ferrara, Karim Mariano, Tullo Livio, Gilda Cinnella
BACKGROUND: Sepsis caused by complicated intra-abdominal infection is associated with high mortality. Loss of endothelial barrier integrity, inflammation, and impaired cellular oxygen have been shown to be primary contributors to sepsis. To date, little is known regarding the pathway for the mobilization of endothelial progenitor cells (EPCs) from the bone marrow in sepsis whereas stromal-cell-derived factor 1a (SDF-1a) and hypoxia inducible factor 1 (HIF-1) seem to have a role in the EPC response to hypoxic microenvironments...
March 12, 2018: Trials
Chakradhari Inampudi, Emmanuel Akintoye, Tomo Ando, Alexandros Briasoulis
Peripheral arterial disease (PAD) refers to narrowing of the peripheral arteries and atherosclerosis is the most important cause. In patients with PAD, revascularization is the preferred therapeutic strategy; nonetheless several patients are not deemed candidates for it due to advanced disease or several comorbidities. The main target of therapeutic angiogenesis is to promote development of new arterial vessels and improve perfusion of ischemic tissue. Angiogenic growth factors such as vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF), hepatocyte growth factor (HGF), administered intramuscularly or intra-arterially, have been shown to promote angiogenesis and development of collateral vasculature in preclinical studies...
March 9, 2018: Current Opinion in Pharmacology
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