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Registros recuperados: 13
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Effect of a rosmarinic acid supplemented hemodialysis fluid on inflammation of human vascular endothelial cells BJMBR
Wang,W-J.; Cheng,M-H.; Lin,J-H.; Weng,C-S..
Chronic systemic inflammation and repetitive damage of vascular endothelia by incompatible dialysis system are probable causes of cardiovascular disease in patients on dialysis. The present study aimed to assess in vitro biocompatibility and anti-inflammatory effect of hemodialysis fluid supplemented with rosmarinic acid (RA) using human umbilical vein endothelial cells (HUVEC). HUVECs (5×106 cells/mL) were pre-exposed to 1 μg/mL of lipopolysaccharides (LPS) and incubated with RA-supplemented hemodialysis fluid (HDF). Cytotoxicity was assessed qualitatively by morphologic assessment and quantitatively by MTT assay. Expressions of proinflammatory mediators were assessed using quantitative real-time PCR and production of NO was quantified. Phosphorylation of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rosmarinic acid; Hemodialysis fluid; Anti-inflammation; Endothelial cells; LPS.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017001200606
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Effects of NO/cGMP inhibitors in a rat model of anaphylactoid shock BJMBR
Albuquerque,A.A.S.; Ferreira,L.G.; Carvalho,M.T.M.; Capellini,V.K.; Evora,P.R.B.; Celotto,A.C..
Anaphylactic shock can be defined as an acute syndrome, and it is the most severe clinical manifestation of allergic diseases. Anaphylactoid reactions are similar to anaphylactic events but differ in the pathophysiological mechanism. Nitric oxide (NO) inhibitors during anaphylaxis suggest that NO might decrease the signs and symptoms of anaphylaxis but exacerbate associated vasodilation. Therefore, blocking the effects of NO on vascular smooth muscle by inhibiting the guanylate cyclase (GC) would be a reasonable strategy. This study aimed to investigate the effects of NO/cGMP pathway inhibitors methylene blue (MB), Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME), and indigo carmine (IC) in shock induced by compound 48/80 (C48/80) in rats. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endothelial cells; Allergy; Rodent; Nitric oxide; Anaphylaxis.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000300606
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Effects of rotational culture on morphology, nitric oxide production and cell cycle of endothelial cells Biocell
Chaojun,Tang; Wu,Xue; Linqi,Ye; Xiang,Xie; Guixue,Wang.
Devices for the rotational culture of cells and the study of biological reactions have been widely applied in tissue engineering. However, there are few reports exploring the effects of rotational culture on cell morphology, nitric oxide (NO) production, and cell cycle of the endothelial cells from human umbilical vein on the stent surface. This study focuses on these parameters after the cells are seeded on the stents. Results showed that covering of stents by endothelial cells was improved by rotational culture. NO production decreased within 24 h in both rotational and static culture groups. In addition, rotational culture significantly increased NO production by 37.9% at 36 h and 28.9% at 48 h compared with static culture. Flow cytometry showed that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endothelial cells; Rotational culture; Stents; Nitric oxide.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452012000300001
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ExoU contributes to late killing of Pseudomonas aeruginosa - infected endothelial cells BJM
Saliba,Alessandra Mattos; Nishi,Rebeca; Assis,Maria Cristina; Plotkowski,Maria Cristina.
To ascertain the role of ExoU in late P. aeruginosa cytotoxicity, endothelial cells (EC) were exposed to wild type PA103, PA103deltaexoU and PA103::exsA for 1h and to gentamicin in culture medium. After 24h, the viability of PA103-infected cells (33.7 ± 14.3%) was significantly lower than the viability of PA103deltaexoU- (77.7 ± 6.3%) or PA103::exsA- (79.5 ± 23.3%) infected EC. P. aeruginosa cytotoxicity did not depend on the bacterial ability to interact with EC because the percentage of cells with associated PA103 (35.9 ± 15.8%) was similar to the percentage in PA103deltaexoU- (34.2 ± 16.0%) and lower than the percentage in PA103::exsA-infected cultures (82.9 ± 18.9%). Cell treatment with cytochalasin D reduced the PA103 internalization by EC but did not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Type III secretion system; ExoU; Endothelial cells; Bacterial cytotoxicity.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500008
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In ovo administration of human recombinant leptin shows dose dependent angiogenic effect on chicken chorioallantoic membrane Biol. Res.
Manjunathan,Reji; Ragunathan,Malathi.
BACKGROUND: Leptin, the cytokine produced by white adipose tissue is known to regulate food energy homeostasis through its hypothalamic receptor. In vitro studies have demonstrated that leptin plays a major role in angiogenesis through binding to the receptor Ob-R present on ECs by stimulating and initiating new capillary like structures from ECs. Various in vivo studies indicate that leptin has diverse effect on angiogenesis. A few reports have showed that leptin exerts pro angiogenic effects while some suggested that it has antiangiogenic potential. It is theoretically highly important to understand the effect of leptin on angiogenesis to use as a therapeutic molecule in various angiogenesis related pathological conditions. Chicken chorio allantoic...
Tipo: Journal article Palavras-chave: Angiogenesis; HRL; Human Recombinant Leptin; CAM; Chorioallantoic membrane; ECs; Endothelial cells; VEGF; Vascular endothelial growth factor; MMP; Matrix metalloproteinase; Blood vessels; CD34.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100029
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Nicotine-evoked cytosolic Ca2+ increase and cell depolarization in capillary endothelial cells of the bovine adrenal medulla Biol. Res.
VINET,RAÚL; CORTÉS,MAGDALENA; LUXORO,MARIO; DELPIANO,MARCO A.
Endothelial cells are directly involved in many functions of the cardiovascular system by regulating blood flow and blood pressure through Ca2+ dependent exocitosis of vasoactive compounds. Using the Ca2+ indicator Fluo-3 and the patch-clamp technique, we show that bovine adrenal medulla capillary endothelial cells (B AMCECs) respond to acetylcholine (ACh) with a cytosolic Ca2+ increase and depolarization of the membrane potential (20.3±0.9 mV; n=23). The increase in cytosolic Ca2+ induced by 10µM ACh was mimicked by the same concentration of nicotine but not by muscarine and was blocked by 100 µM of hexamethonium. On the other hand, the increase in cytosolic Ca2+ could be depressed by nifedipine (0.01 -100 µM) or withdrawal of extracellular Ca2+. Taken...
Tipo: Journal article Palavras-chave: Capillary; Endothelial cells; Intracellular Ca2+; Nicotinic receptor; Voltage-activated Ca2+ channels.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000100012
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Nitric oxide regulates angiotensin-I converting enzyme under static conditions but not under shear stress BJMBR
Pertrini,C.M.; Miyakawa,A.A.; Laurindo,F.R.M.; Krieger,J.E..
Mechanical forces including pressure and shear stress play an important role in vascular homeostasis via the control of the production and release of a variety of vasoactive factors. An increase in vascular shear stress is accompanied by nitric oxide (NO) release and NO synthase activation. Previously, we have demonstrated that shear stress induces angiotensin-I converting enzyme (ACE) down-regulation in vivo and in vitro. In the present study, we determined whether NO participates in the shear stress-induced ACE suppression response. Rabbit aortic endothelial cells were evaluated using the NO synthase inhibitor L-NAME, and two NO donors, diethylamine NONOate (DEA/NO) and sodium nitroprusside (SNP). Under static conditions, incubation of endothelial cells...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Shear stress; Angiotensin-I converting enzyme; Nitric oxide; Endothelial cells.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000900005
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Propofol inhibits burn injury-induced hyperpermeability through an apoptotic signal pathway in microvascular endothelial cells BJMBR
Tian,K.Y.; Liu,X.J.; Xu,J.D.; Deng,L.J.; Wang,G..
Recent studies have revealed that an intrinsic apoptotic signaling cascade is involved in vascular hyperpermeability and endothelial barrier dysfunction. Propofol (2,6-diisopropylphenol) has also been reported to inhibit apoptotic signaling by regulating mitochondrial permeability transition pore (mPTP) opening and caspase-3 activation. Here, we investigated whether propofol could alleviate burn serum-induced endothelial hyperpermeability through the inhibition of the intrinsic apoptotic signaling cascade. Rat lung microvascular endothelial cells (RLMVECs) were pretreated with propofol at various concentrations, followed by stimulation with burn serum, obtained from burn-injury rats. Monolayer permeability was determined by transendothelial electrical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Burn injury; Hyperpermeability; Propofol; Apoptosis; Endothelial cells.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000500401
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rACLF, a recombinant snake venom metalloprotease, activates endothelial cells in vitro J. Venom. Anim. Toxins incl. Trop. Dis.
De Moraes,C. K.; Fritzen,M.; Chudzinski-Tavassi,A. M.; Selistre-de-Araújo,H. S..
Snake venom metalloproteases (SVMPs) comprise a family of snake venom toxins responsible for most of local and systemic effects observed during envenomation by snakes from the Viperidae family. The vascular system and more specifically the endothelium seem to be the preferential targets of these proteins. This work describes the effects of rACLF, a recombinant SVMP from Agkistrodon contortrix laticinctus on human umbilical vein endothelial cells (HUVECs) in vitro. Our results showed that rACLF activates HUVECs by the release of mediators involved in inflammation and hemostasis such as prostacyclin and interleukin-8. We also demonstrated that rACLF increased the expression of ICAM-I and decay accelerating factor (DAF). Moreover, rACLF protects the HUVECs...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RACLF; Snake venom metalloprotease; Endothelial cells; Inflammation.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000100009
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Tissue expression of platelet endothelial cell adhesion molecule-1 at pre and postnatal murine development Biocell
Calabrese,Graciela Cristina; Wainstok,Rosa.
Endothelial cells, at the cell-cell borders, express PECAM-1, and have been implicated in vascular functions. The monoclonal antibody MEC 13.3 recognizes PECAM-1 molecule from mouse vessels and allows to analyze the ontogeny of mouse endothelium. At the present, little is known about the molecular basis of differentiation pathways of endothelial cells, that enables its morphological heterogeneity. The purpose of this study was to analyze the pattern of PECAM-1 expression, employing monoclonal antibody MEC 13.3, in cellular suspensions obtained from different mouse organs at pre and postnatal stages. Fluorescence activated cell sorter analysis showed a different profile of the glycoprotein expression in a cell population with size and granularity selected...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endothelial cells; PECAM-1; Vasculogenesis; Mouse organs.
Ano: 2004 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452004000300001
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T-kininogen inhibits kinin-mediated activation of ERK in endothelial cells Biol. Res.
LEIVA-SALCEDO,ELIAS; PEREZ,VIVIANA; ACUÑA-CASTILLO,CLAUDIO; WALTER,ROBIN; SIERRA,FELIPE.
Serum levels of T-kininogen increase dramatically as rats approach the end of their lifespan. Stable expression of the protein in Balb/c 3T3 fibroblasts leads to a dramatic inhibition of cell proliferation, as well as inhibition of the ERK signaling pathway. T-kininogen is a potent inhibitor of cysteine proteinases, and we have described that the inhibition of ERK activity occurs, at least in part, via stabilization of the MAP kinase phosphatase, MKP-1. Since fibroblasts are not a physiological target of T-kininogen, we have now purified the protein from rat serum, and used it to assess the effect of T-kininogen on endothelial cells. Adding purified T-kininogen to EAhy 926 hybridoma cells resulted in inhibition of basal ERK activity levels, as estimated...
Tipo: Journal article Palavras-chave: Aging; Endothelial cells; ERK pathway; Kininogen; Kinins.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000200020
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Ultrastructure Features of Coronary Artery Endothelium in Bactrian Camel (Camelus bactrianus) International Journal of Morphology
Yuan,Guoqiang; Pan,Yawen; Li,Haiyan; Wang,Jianlin.
Vascular endothelium play an essential role in regulating endothelial functions by maintaining normal vascular tone, modulating hemostasis, and preventing thromobogenesis. The aim of present study was to reveal ultrastructure features of coronary artery endothelium in Bactrian Camels by means of scanning electron microscope (SEM) technology. The results showed that the endothelial cells distribute along the direction of blood flow. Their morphology and protuberant degree towards luminal surface vary for different parts of the coronary artery. The luminal surface of a.c oronaria sinistra and a. coronaria dextra was covered by impaired and intact endothelium, respectively. Platelets and leukocytes sticking to the endothelium were found.
Tipo: Journal article Palavras-chave: Endothelial cells; Bactrian Camel; Coronary artery; Ultrastructure.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100040
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Vascular Changes in the Corpus Luteum During Early pregnancy in the Cow OAK
BEINDORFF, Nicola; NAGAI, Kaya; SHIRASUNA, Koumei; HERZOG, Kathrin; HOEFFMANN, Katharina; SASAKI, Motoki; BOLLWEIN, Heinrich; MIYAMOTO, Akio; 佐々木, 基樹; 宮本, 明夫; 白砂, 孔明.
The present study determined vascular changes in the bovine corpus luteum (CL) at Day 16 (early maternal recognition period) and Day 40 in early pregnancy and compared them to the CL from Day 12 and Day 16 of the estrous cycle. The CLs were analyzed in the central and peripheral regions, where site-depending features of vessels and angiogenic factors are evident. The same protein level of the endothelial cell marker von Willebrand factor was retained in the CL from Day 16 of the estrous cycle to Day 40 of early pregnancy. The protein level of pericytes and smooth muscle cells was determined using smooth muscle α-actin; the level decreased at Day 40 of early pregnancy in both regions of the CL. No significant change in the expressions of vascular...
Palavras-chave: Corpus luteum; Cow; Early pregnancy; Endothelial cells.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2811
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