Association between Urinary Phthalate Metabolites and Markers of Endothelial Dysfunction in Adolescents and Young Adults

Endothelial function is crucial in the pathogenesis of circulatory and cardiovascular toxicity; epidemiologic research investigating the association between phthalate exposure and endothelial dysfunction remains limited. We examined the associations between exposures to specific phthalates (di-2-ethylhexyl phthalate, DEHP; di-n-butyl phthalate, DnBP) and circulating endothelial and platelet microparticles (EMPs and PMPs) in adolescents and young adults. Of the 697 participants recruited, anthropometric measurements and health-related behaviors relevant to cardiovascular risks were collected and assessed. Urine and serum were collected and analyzed with liquid chromatography-tandem mass spectrometry (LC-MS/MS) and flow cytometry. Multiple linear regression indicated that increases in urinary concentrations of ΣDEHP and MnBP (mono-n-butyl phthalate), across quartiles, were positively associated with serum EMPs level (p for trend <0.001 and <0.001; β = 0.798 and 0.007; standard error = 0.189 and 0.001, respectively). Moreover, female and overweight subjects had higher MnBP, and males were more vulnerable to DnBP exposure compared to females. In conclusion, our results demonstrate a dose-response relationship between exposures to phthalates (ΣDEHP and MnBP) and microparticle formation (EMPs and PMPs) in adolescents and young adults. The findings indicate that exposures to phthalates of both low and high-molecular weight are positively associated with microparticle production, and might contribute to endothelial dysfunction; such damage might manifest in the form of atherosclerotic-related vascular diseases. Future in vivo and in vitro studies are warranted to elucidate whether a causal relationship exists between phthalate exposure and EMPs and PMPs.

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Group V Phospholipase A2 Mediates Endothelial Dysfunction and Acute Lung Injury Caused by Methicillin-Resistant Staphylococcus aureus

Cells ◽

10.3390/cells10071731 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1731

Author(s):

Yu Maw Htwe ◽

Huashan Wang ◽

Patrick Belvitch ◽

Lucille Meliton ◽

Mounica Bandela ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Acute Lung Injury ◽

Endothelial Dysfunction ◽

Lung Injury ◽

Phospholipase A2 ◽

Methicillin Resistant Staphylococcus Aureus ◽

Group V ◽

Methicillin Resistant

Lung endothelial dysfunction is a key feature of acute lung injury (ALI) and clinical acute respiratory distress syndrome (ARDS). Previous studies have identified the lipid-generating enzyme, group V phospholipase A2 (gVPLA2), as a mediator of lung endothelial barrier disruption and inflammation. The current study aimed to determine the role of gVPLA2 in mediating lung endothelial responses to methicillin-resistant Staphylococcus aureus (MRSA, USA300 strain), a major cause of ALI/ARDS. In vitro studies assessed the effects of gVPLA2 inhibition on lung endothelial cell (EC) permeability after exposure to heat-killed (HK) MRSA. In vivo studies assessed the effects of intratracheal live or HK-MRSA on multiple indices of ALI in wild-type (WT) and gVPLA2-deficient (KO) mice. In vitro, HK-MRSA increased gVPLA2 expression and permeability in human lung EC. Inhibition of gVPLA2 with either the PLA2 inhibitor, LY311727, or with a specific monoclonal antibody, attenuated the barrier disruption caused by HK-MRSA. LY311727 also reduced HK-MRSA-induced permeability in mouse lung EC isolated from WT but not gVPLA2-KO mice. In vivo, live MRSA caused significantly less ALI in gVPLA2 KO mice compared to WT, findings confirmed by intravital microscopy assessment in HK-MRSA-treated mice. After targeted delivery of gVPLA2 plasmid to lung endothelium using ACE antibody-conjugated liposomes, MRSA-induced ALI was significantly increased in gVPLA2-KO mice, indicating that lung endothelial expression of gVPLA2 is critical in vivo. In summary, these results demonstrate an important role for gVPLA2 in mediating MRSA-induced lung EC permeability and ALI. Thus, gVPLA2 may represent a novel therapeutic target in ALI/ARDS caused by bacterial infection.

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Generation of a Novel In Vitro Model to Study Endothelial Dysfunction from Atherothrombotic Specimens

Cardiovascular Drugs and Therapy ◽

10.1007/s10557-021-07151-9 ◽

2021 ◽

Author(s):

Susan Gallogly ◽

Takeshi Fujisawa ◽

John D. Hung ◽

Mairi Brittan ◽

Elizabeth M. Skinner ◽

...

Keyword(s):

Endothelial Cells ◽

Endothelial Dysfunction ◽

In Vitro Model ◽

Umbilical Vein ◽

Coronary Syndrome ◽

Coronary Endothelial Cells ◽

Vitro Model ◽

Umbilical Vein Endothelial Cells

Abstract Purpose Endothelial dysfunction is central to the pathogenesis of acute coronary syndrome. The study of diseased endothelium is very challenging due to inherent difficulties in isolating endothelial cells from the coronary vascular bed. We sought to isolate and characterise coronary endothelial cells from patients undergoing thrombectomy for myocardial infarction to develop a patient-specific in vitro model of endothelial dysfunction. Methods In a prospective cohort study, 49 patients underwent percutaneous coronary intervention with thrombus aspiration. Specimens were cultured, and coronary endothelial outgrowth (CEO) cells were isolated. CEO cells, endothelial cells isolated from peripheral blood, explanted coronary arteries, and umbilical veins were phenotyped and assessed functionally in vitro and in vivo. Results CEO cells were obtained from 27/37 (73%) atherothrombotic specimens and gave rise to cells with cobblestone morphology expressing CD146 (94 ± 6%), CD31 (87 ± 14%), and von Willebrand factor (100 ± 1%). Proliferation of CEO cells was impaired compared to both coronary artery and umbilical vein endothelial cells (population doubling time, 2.5 ± 1.0 versus 1.6 ± 0.3 and 1.2 ± 0.3 days, respectively). Cell migration was also reduced compared to umbilical vein endothelial cells (29 ± 20% versus 85±19%). Importantly, unlike control endothelial cells, dysfunctional CEO cells did not incorporate into new vessels or promote angiogenesis in vivo. Conclusions CEO cells can be reliably isolated and cultured from thrombectomy specimens in patients with acute coronary syndrome. Compared to controls, patient-derived coronary endothelial cells had impaired capacity to proliferate, migrate, and contribute to angiogenesis. CEO cells could be used to identify novel therapeutic targets to enhance endothelial function and prevent acute coronary syndromes.

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Hyperglycaemia up-regulates placental growth factor (PlGF) expression and secretion in endothelial cells via suppression of PI3 kinase-Akt signalling and activation of FOXO1

Scientific Reports ◽

10.1038/s41598-021-95511-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Samir Sissaoui ◽

Stuart Egginton ◽

Ling Ting ◽

Asif Ahmed ◽

Peter W. Hewett

Keyword(s):

Endothelial Cells ◽

Growth Factor ◽

Endothelial Dysfunction ◽

Akt Activation ◽

Forkhead Box ◽

Pi3k Activity ◽

Binding Sequence

AbstractPlacenta growth factor (PlGF) is a pro-inflammatory angiogenic mediator that promotes many pathologies including diabetic complications and atherosclerosis. Widespread endothelial dysfunction precedes the onset of these conditions. As very little is known of the mechanism(s) controlling PlGF expression in pathology we investigated the role of hyperglycaemia in the regulation of PlGF production in endothelial cells. Hyperglycaemia stimulated PlGF secretion in cultured primary endothelial cells, which was suppressed by IGF-1-mediated PI3K/Akt activation. Inhibition of PI3K activity resulted in significant PlGF mRNA up-regulation and protein secretion. Similarly, loss or inhibition of Akt activity significantly increased basal PlGF expression and prevented any further PlGF secretion in hyperglycaemia. Conversely, constitutive Akt activation blocked PlGF secretion irrespective of upstream PI3K activity demonstrating that Akt is a central regulator of PlGF expression. Knock-down of the Forkhead box O-1 (FOXO1) transcription factor, which is negatively regulated by Akt, suppressed both basal and hyperglycaemia-induced PlGF secretion, whilst FOXO1 gain-of-function up-regulated PlGF in vitro and in vivo. FOXO1 association to a FOXO binding sequence identified in the PlGF promoter also increased in hyperglycaemia. This study identifies the PI3K/Akt/FOXO1 signalling axis as a key regulator of PlGF expression and unifying pathway by which PlGF may contribute to common disorders characterised by endothelial dysfunction, providing a target for therapy.

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Endothelial-to-Mesenchymal Transition in Human Adipose Tissue Vasculature Alters the Particulate Secretome and Induces Endothelial Dysfunction

Arteriosclerosis Thrombosis and Vascular Biology ◽

10.1161/atvbaha.119.312826 ◽

2019 ◽

Vol 39 (10) ◽

pp. 2168-2191 ◽

Cited By ~ 3

Author(s):

Bronson A. Haynes ◽

Li Fang Yang ◽

Ryan W. Huyck ◽

Eric J. Lehrer ◽

Joshua M. Turner ◽

...

Keyword(s):

Adipose Tissue ◽

Endothelial Dysfunction ◽

Smooth Muscle Actin ◽

Phenotypic Change ◽

Alpha Smooth Muscle Actin ◽

Mesenchymal Transition ◽

Molecular Features ◽

Endothelial To Mesenchymal Transition

Objective: Endothelial cells (EC) in obese adipose tissue (AT) are exposed to a chronic proinflammatory environment that may induce a mesenchymal-like phenotype and altered function. The objective of this study was to establish whether endothelial-to-mesenchymal transition (EndoMT) is present in human AT in obesity and to investigate the effect of such transition on endothelial function and the endothelial particulate secretome represented by extracellular vesicles (EV). Approach and Results: We identified EndoMT in obese human AT depots by immunohistochemical co-localization of CD31 or vWF and α-SMA (alpha-smooth muscle actin). We showed that AT EC exposed in vitro to TGF-β (tumor growth factor-β), TNF-α (tumor necrosis factor-α), and IFN-γ (interferon-γ) undergo EndoMT with progressive loss of endothelial markers. The phenotypic change results in failure to maintain a tight barrier in culture, increased migration, and reduced angiogenesis. EndoMT also reduced mitochondrial oxidative phosphorylation and glycolytic capacity of EC. EVs produced by EC that underwent EndoMT dramatically reduced angiogenic capacity of the recipient naïve ECs without affecting their migration or proliferation. Proteomic analysis of EV produced by EC in the proinflammatory conditions showed presence of several pro-inflammatory and immune proteins along with an enrichment in angiogenic receptors. Conclusions: We demonstrated the presence of EndoMT in human AT in obesity. EndoMT in vitro resulted in production of EV that transferred some of the functional and metabolic features to recipient naïve EC. This result suggests that functional and molecular features of EC that underwent EndoMT in vivo can be disseminated in a paracrine or endocrine fashion and may induce endothelial dysfunction in distant vascular beds.

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Endothelial dysfunction and thromboembolism in children, adolescents, and young adults with acute lymphoblastic leukemia

Leukemia ◽

10.1038/s41375-021-01383-2 ◽

2021 ◽

Author(s):

Liv Andrés-Jensen ◽

Kathrine Grell ◽

Cecilie Utke Rank ◽

Birgitte Klug Albertsen ◽

Ruta Tuckuviene ◽

...

Keyword(s):

Young Adults ◽

Acute Lymphoblastic Leukemia ◽

Endothelial Dysfunction ◽

Lymphoblastic Leukemia ◽

Adolescents And Young Adults

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Antioxidant Effects of Eryngium carlinae in Diabetic Rats

Asian Journal of Applied Sciences ◽

10.24203/ajas.v6i5.5482 ◽

2018 ◽

Vol 6 (5) ◽

Author(s):

Diana GarcÃa-Cerrillo ◽

Ruth Noriega-Cisneros ◽

Donovan PeÃ±a-Montes ◽

Maribel Huerta-Cervantes ◽

MÃ³nica Silva-RÃos ◽

...

Keyword(s):

Metabolic Diseases ◽

Systemic Disease ◽

Cardiac Injury ◽

Thiobarbituric Acid ◽

Diabetic Rats ◽

Cardiovascular Risks ◽

Thiobarbituric Acid Reactive Substances ◽

Antioxidant Effects

Metabolic diseases have increased considerably such as diabetes mellitus (DM). Since diabetes is a systemic disease, it implies high cardiovascular risks. It has been widely established that cardiac injury is related to mitochondrial dysfunction through increment of reactive oxygen species (ROS). Synthetic antioxidants can have important side effects; therefore natural sources may represent a better option. Traditional Mexican medicine has been using Eryngium carlinae (EC) for medical treatment. Also our group showed that hexanic extract possesses in vitro antioxidant capacity. Experimental diabetes in Wistar rats was generated by streptozotocin (STZ) and hexanic extract of EC was supplied for 7 weeks (30 mg/kg). Cholesterol, triacylglycerides, glucose, and thiobarbituric acid reactive substances (TBARS) levels were determined in serum. Mitochondria from left ventricle were used in the quantification of TBARS, reduced glutathione, nitric oxide (NO) levels and activity of superoxide dismutase (SOD) enzyme was performed.Â Biochemical parameters of glucose and triacylglycerides, as well as TBARS levels in serum show a significant reduction in diabetic group supplied with EC hexanic extract. Thus, we can conclude that the EC hexanic extract possesses antioxidant activity in vitro, and in vivo, by reducing glucose and triacylglycerides levels during hyperglycemia, which may eventually reduce the risk of developing diabetic cardiomyopathy.

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Antiartherosclerotic Effects of Plant Flavonoids

BioMed Research International ◽

10.1155/2014/480258 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 80

Author(s):

Shamala Salvamani ◽

Baskaran Gunasekaran ◽

Noor Azmi Shaharuddin ◽

Siti Aqlima Ahmad ◽

Mohd Yunus Shukor

Keyword(s):

Cardiovascular Diseases ◽

Side Effects ◽

Animal Models ◽

Vascular Diseases ◽

Lipid Lowering ◽

Peripheral Vascular ◽

Heart Attacks ◽

Synthetic Drug

Atherosclerosis is the process of hardening and narrowing the arteries. Atherosclerosis is generally associated with cardiovascular diseases such as strokes, heart attacks, and peripheral vascular diseases. Since the usage of the synthetic drug, statins, leads to various side effects, the plants flavonoids with antiartherosclerotic activity gained much attention and were proven to reduce the risk of atherosclerosisin vitroandin vivobased on different animal models. The flavonoids compounds also exhibit lipid lowering effects and anti-inflammatory and antiatherogenic properties. The future development of flavonoids-based drugs is believed to provide significant effects on atherosclerosis and its related diseases. This paper discusses the antiatherosclerotic effects of selected plant flavonoids such as quercetin, kaempferol, myricetin, rutin, naringenin, catechin, fisetin, and gossypetin.

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Abstract 140: Anti-inflammatory and Anti-atherogenic Role of Bmp Receptor II In Endothelial Cells

Arteriosclerosis Thrombosis and Vascular Biology ◽

10.1161/atvb.33.suppl_1.a140 ◽

2013 ◽

Vol 33 (suppl_1) ◽

Author(s):

Chanwoo Kim ◽

Hannah Song ◽

Sandeep Kumar ◽

Douglas Nam ◽

Hyuk Sang Kwon ◽

...

Keyword(s):

Endothelial Dysfunction ◽

Intracellular Signaling ◽

Independent Manner ◽

Disturbed Flow ◽

Bmp Receptors ◽

Endothelial Inflammation ◽

Anti Inflammatory

Atherosclerosis is a multifactorial disease that arises from a combination of endothelial dysfunction and inflammation, occurring preferentially in arterial regions exposed to disturbed flow. Bone morphogenic protein-4 (BMP4) produced by disturbed flow induces inflammation, endothelial dysfunction and hypertension, suggesting the importance of BMPs in vascular biology and disease. BMPs bind to two different types of BMP receptors (BMPRI and II) to instigate intracellular signaling. Increasing evidences suggest a correlative role of BMP4 and atherosclerosis, but the role of BMP receptors especially BMPRII in atherosclerosis is still unclear and whether knockdown of BMPRII is the cause or the consequence of atherosclerosis is still not known. It is therefore, imperative to investigate the mechanisms by which BMPRII expression is modulated and its ramifications in atherosclerosis. Initially, we expected that knockdown of BMPRII will result in loss of pro-atherogenic BMP4 signaling and will thereby prevent atherosclerosis. Contrarily, we found that loss of BMPRII expression causes endothelial inflammation and atherosclerosis. Using BMPRII siRNA and BMPRII +/- mice, we found that BMPRII knockdown induces endothelial inflammation in a BMP-independent manner via mechanisms involving reactive oxygen species (ROS), NFκB, and NADPH oxidases. Further, BMPRII +/- ApoE -/- mice develop accelerated atherosclerosis compared to BMPRII +/+ ApoE -/- mice, suggesting loss of BMPRII may induce atherosclerosis. Interestingly, we found that multiple pro-atherogenic stimuli such as hypercholesterolemia, disturbed flow, pro-hypertensive angiotensin II, and pro-inflammatory cytokine, TNFα, downregulate BMPRII expression in endothelium, while anti-atherogenic stimuli such as stable flow and statin treatment upregulate its expression, both in vivo and in vitro . Moreover, we found that BMPRII expression is significantly diminished in human coronary advanced atherosclerotic lesions. These results suggest that BMPRII is a critical, anti-inflammatory and anti-atherogenic protein that is commonly targeted by multiple pro- and anti-atherogenic factors. BMPRII could be used as a novel diagnostic and therapeutic target in atherosclerosis.

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The role of 5-HT7 receptors on isoproterenol-induced myocardial infarction in rats with high-fat diet exacerbated coronary endothelial dysfunction

Human & Experimental Toxicology ◽

10.1177/0960327120916821 ◽

2020 ◽

Vol 39 (8) ◽

pp. 1005-1018 ◽

Cited By ~ 1

Author(s):

I Cinar ◽

Z Halici ◽

B Dincer ◽

B Sirin ◽

E Cadirci

Keyword(s):

Myocardial Infarction ◽

Endothelial Dysfunction ◽

High Fat Diet ◽

Density Lipoprotein ◽

Heart Tissue ◽

High Fat ◽

Inflammatory Status

The presence of 5-HT7r’s in both human and rat cardiovascular and immune tissues and their contribution to inflammatory conditions prompted us to hypothesize that these receptors contribute in acute myocardial infarction (MI) with underlying chronic endothelial dysfunction. We investigated the role of 5-HT7 receptors on heart tissue that damaged by isoproterenol (ISO)-induced MI in rats with high-fat diet (HFD). In vitro and in vivo effects of 5-HT7r agonist (LP44) and antagonist (SB269970) have been investigated on the H9C2 cell line and rats, respectively. For in vivo analyses, rats were fed with HFD for 8 weeks and after this period ISO-induced MI model has been applied to rat. To investigate the role of 5-HT7r’s, two different doses of LP44 and SB269970 were evaluated and compared with standard hypolipidemic agent, atorvastatin. In vitro studies showed that LP44 has protective and proliferative effects on rat cardiomyocytes. Also in in vivo studies stimulating 5-HT7r’s by LP44 improved blood lipid profile (decreased total cholesterol, low-density lipoprotein-C, and triglyceride, increased high-density lipoprotein), decreased cardiac damage markers (creatine kinase and troponin-I), and corrected inflammatory status (tumor necrosis factor-α, interleukin-6). Our results showed significant improvement in LP44 administered rats in terms of histopathologic analyses. In damaged tissues, 5-HT7 mRNA expression increased and agonist administration decreased this elevation significantly. We determined for the first time that 5-HT7r’s are overexpressed in ISO-induced MI of rats with underlying HFD-induced endothelial dysfunction. Restoration of this overexpression by LP44, a 5-HT7r agonist, ameliorated heart tissue in physiopathologic, enzymatic, and molecular level, showing the cardiac role of these receptors and suggesting them as future potential therapeutic targets.

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