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Chinnappa S, Maqbool A, Viswambharan H, Mooney A, Denby L, Drinkhill M. Beta Blockade Prevents Cardiac Morphological and Molecular Remodelling in Experimental Uremia. Int J Mol Sci 2023; 25:373. [PMID: 38203544 PMCID: PMC10778728 DOI: 10.3390/ijms25010373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/18/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024] Open
Abstract
Heart failure and chronic kidney disease (CKD) share several mediators of cardiac pathological remodelling. Akin to heart failure, this remodelling sets in motion a vicious cycle of progressive pathological hypertrophy and myocardial dysfunction in CKD. Several decades of heart failure research have shown that beta blockade is a powerful tool in preventing cardiac remodelling and breaking this vicious cycle. This phenomenon remains hitherto untested in CKD. Therefore, we set out to test the hypothesis that beta blockade prevents cardiac pathological remodelling in experimental uremia. Wistar rats had subtotal nephrectomy or sham surgery and were followed up for 10 weeks. The animals were randomly allocated to the beta blocker metoprolol (10 mg/kg/day) or vehicle. In vivo and in vitro cardiac assessments were performed. Cardiac tissue was extracted, and protein expression was quantified using immunoblotting. Histological analyses were performed to quantify myocardial fibrosis. Beta blockade attenuated cardiac pathological remodelling in nephrectomised animals. The echocardiographic left ventricular mass and the heart weight to tibial length ratio were significantly lower in nephrectomised animals treated with metoprolol. Furthermore, beta blockade attenuated myocardial fibrosis associated with subtotal nephrectomy. In addition, the Ca++- calmodulin-dependent kinase II (CAMKII) pathway was shown to be activated in uremia and attenuated by beta blockade, offering a potential mechanism of action. In conclusion, beta blockade attenuated hypertrophic signalling pathways and ameliorated cardiac pathological remodelling in experimental uremia. The study provides a strong scientific rationale for repurposing beta blockers, a tried and tested treatment in heart failure, for the benefit of patients with CKD.
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Affiliation(s)
- Shanmugakumar Chinnappa
- Department of Nephrology, Doncaster and Bassetlaw Teaching Hospitals NHS Trust, Doncaster DN2 5LT, UK
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), University of Leeds, Leeds LS2 9JT, UK; (A.M.); (H.V.)
| | - Azhar Maqbool
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), University of Leeds, Leeds LS2 9JT, UK; (A.M.); (H.V.)
| | - Hema Viswambharan
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), University of Leeds, Leeds LS2 9JT, UK; (A.M.); (H.V.)
| | - Andrew Mooney
- Department of Nephrology, Leeds Teaching Hospitals NHS Trust, Leeds LS9 7TF, UK;
| | - Laura Denby
- Centre for Cardiovascular Science, The Queen’s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, UK;
| | - Mark Drinkhill
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), University of Leeds, Leeds LS2 9JT, UK; (A.M.); (H.V.)
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Imrie H, Viswambharan H, Haywood NJ, Bridge KI, Yuldasheva NY, Galloway S, Simmons KJ, Cubbon RM, Sukumar P, Watt NT, Lichtenstein L, Wyatt JI, Kudo H, Goldin R, Rode B, Wheatcroft SB, Kearney MT. Cixutumumab reveals a critical role for IGF-1 in adipose and hepatic tissue remodelling during the development of diet-induced obesity. Adipocyte 2022; 11:366-378. [PMID: 35734881 PMCID: PMC9235901 DOI: 10.1080/21623945.2022.2089394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
High fat diet (HFD)-induced obesity leads to perturbation in the storage function of white adipose tissue (WAT) resulting in deposition of lipids in tissues ill-equipped to deal with this challenge. The role of insulin like growth factor-1 (IGF-1) in the systemic and organ-specific responses to HFD is unclear. Using cixutumumab, a monoclonal antibody that internalizes and degrades cell surface IGF-1 receptors (IGF-1 R), leaving insulin receptor expression unchanged we aimed to establish the role of IGF-1 R in the response to a HFD. Mice treated with cixutumumab fed standard chow developed mild hyperinsulinemia with no change in WAT. When challenged by HFD mice treated with cixutumumab had reduced weight gain, reduced WAT expansion, and reduced hepatic lipid vacuole formation. In HFD-fed mice, cixutumumab led to reduced levels of genes encoding proteins important in fatty acid metabolism in WAT and liver. Cixutumumab protected against blunting of insulin-stimulated phosphorylation of Akt in liver of HFD fed mice. These data reveal an important role for IGF-1 R in the WAT and hepatic response to short-term nutrient excess. IGF-1 R inhibition during HFD leads to a lipodystrophic phenotype with a failure of WAT lipid storage and protection from HFD-induced hepatic insulin resistance.
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Affiliation(s)
- Helen Imrie
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Hema Viswambharan
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Natalie J Haywood
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Katherine I Bridge
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Nadira Y Yuldasheva
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Stacey Galloway
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Katie J Simmons
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Richard M Cubbon
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Piruthivi Sukumar
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Nicole T Watt
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Laeticia Lichtenstein
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Judy I Wyatt
- Department of Pathology, Leeds Teaching Hospitals NHS Trust, Leeds, United Kingdom
| | - Hiromi Kudo
- Department of Metabolism, Digestion and Reproduction, Imperial College, London, United Kingdom
| | - Robert Goldin
- Department of Metabolism, Digestion and Reproduction, Imperial College, London, United Kingdom
| | - Baptiste Rode
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Stephen B Wheatcroft
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Mark T Kearney
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
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Zhang R, Viswambharan H, Cheng CW, Garstka MA, Kain K. Inter-ankle Systolic Blood Pressure Difference Is a Marker of Increased Fasting Blood-Glucose in Asian Pregnant Women. Front Endocrinol (Lausanne) 2022; 13:842254. [PMID: 35712250 PMCID: PMC9195077 DOI: 10.3389/fendo.2022.842254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 04/15/2022] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVE This cross-sectional study aimed to determine the relationship between clinical blood pressures and blood pressures measured using Doppler with blood glucose in pregnancy by ethnicity. METHODS We recruited 179 (52% White European, 48% Asian) pregnant women at 24-28 weeks of gestation who underwent a glucose tolerance test in an antenatal clinic in Bradford Royal Infirmary, the UK, from 2012 to 2013. Systolic blood pressures in the arm (left and right brachial) and ankle [left and right posterior tibial (PT) and dorsalis pedalis (DP)] blood pressures were measured using a Doppler probe. The inter-arm (brachial) and inter-ankle (PT and DP) systolic blood pressure differences were obtained. A multivariate linear regression model adjusted for age, body mass index, and diabetes risk was used to assess the relationship between blood pressures and blood glucose. RESULTS Asian pregnant women had higher blood glucose but lower ankle blood pressures than White Europeans. In White Europeans, brachial blood pressures and clinical blood pressures were positively associated with fasting blood glucose (FBG), but brachial blood pressures did not perform better as an indicator of FBG than clinical blood pressures. In Asians, increased inter-ankle blood pressure difference was associated with increased FBG. For each 10 mmHg increase in the inter-ankle blood pressure difference, FBG increased by 0.12 mmol/L (Beta=0.12, 95%CI: 0.01-0.23). CONCLUSION The relationship between blood pressures with blood glucose differed by ethnicity. In Asians, inter-ankle systolic blood pressure difference was positively associated with blood glucose. This is first ever report on ankle blood pressures with blood glucose in pregnancy which suggests future potential as a non-invasive gestational diabetes risk screening tool.
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Affiliation(s)
- Ruo Zhang
- Department of Endocrinology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Hema Viswambharan
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Chew Weng Cheng
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
- *Correspondence: Malgorzata Anna Garstka, ; Chew Weng Cheng,
| | - Malgorzata Anna Garstka
- Core Research Laboratory, Department of Endocrinology, Department of Tumor and Immunology, Precision Medical Institute, Western China Science and Technology Innovation Port, The Second Affiliated Hospital, Health Science Center, Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Malgorzata Anna Garstka, ; Chew Weng Cheng,
| | - Kirti Kain
- NHS England & NHS Improvement (North East and Yorkshire), Leeds, United Kingdom
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Viswambharan H, Yuldasheva NY, Imrie H, Bridge K, Haywood NJ, Skromna A, Hemmings KE, Clark ER, Gatenby VK, Cordell P, Simmons KJ, Makava N, Abudushalamu Y, Endesh N, Brown J, Walker AMN, Futers ST, Porter KE, Cubbon RM, Naseem K, Shah AM, Beech DJ, Wheatcroft SB, Kearney MT, Sukumar P. Novel Paracrine Action of Endothelium Enhances Glucose Uptake in Muscle and Fat. Circ Res 2021; 129:720-734. [PMID: 34420367 PMCID: PMC8448413 DOI: 10.1161/circresaha.121.319517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
[Figure: see text].
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Affiliation(s)
- Hema Viswambharan
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Nadira Y Yuldasheva
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Helen Imrie
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Katherine Bridge
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Natalie J Haywood
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Anna Skromna
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Karen E Hemmings
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Emily R Clark
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - V Kate Gatenby
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Paul Cordell
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Katie J Simmons
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Natallia Makava
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Yilizila Abudushalamu
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Naima Endesh
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Jane Brown
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Andrew M N Walker
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Simon T Futers
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Karen E Porter
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Richard M Cubbon
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Khalid Naseem
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Ajay M Shah
- British Heart Foundation Centre of Research Excellence, King's College London (A.M.S.)
| | - David J Beech
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Stephen B Wheatcroft
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Mark T Kearney
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
| | - Piruthivi Sukumar
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., H.I., K.B., N.J.H., A.S., K.E.H., E.R.C., V.K.G., P.C., K.J.S., N.M., Y.A., N.E., J.B., A.M.N.W., S.T.F., K.E.P., R.M.C., K.N., D.J.B., S.B.W., M.T.K., P.S.)
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Viswambharan H, Cheng CW, Kain K. Differential associations of ankle and brachial blood pressures with diabetes and cardiovascular diseases: cross-sectional study. Sci Rep 2021; 11:9406. [PMID: 33931717 PMCID: PMC8087686 DOI: 10.1038/s41598-021-88973-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/14/2021] [Indexed: 11/18/2022] Open
Abstract
Increased brachial systolic blood-pressure (BP) predicts diabetes (T2DM) but is not fully effective. Value of absolute ankle systolic BP for T2DM compared to brachial systolic BP is not known. Our objectives were to assess independent relationships of ankle-systolic BP with T2DM and cardiovascular disease in Europeans and south Asians. Cross-sectional studies of anonymised data from registered adults (n = 1087) at inner city deprived primary care practices. Study includes 63.85% ethnic minority. Systolic BP of the left and right-brachial, posterior-tibial and dorsalis-pedis-arteries measured using a Doppler probe. Regression models’ factors were age, sex, ethnicity, body mass index (BMI) and waist height ratio (WHtR). Both brachial and ankle systolic-BP increase with diabetes in Europeans and south Asians. We demonstrated that there was a significant positive independent association of ankle BP with diabetes, regardless of age and sex compared to Brachial. There was stronger negative association of ankle blood pressure with cardiovascular disease, after adjustment for BMI, WHtR and ethnicity. Additionally, we found that ankle BP were significantly associated with cardiovascular disease in south Asians more than the Europeans; right posterior tibial. Ankle systolic BPs are superior to brachial BPs to identify risks of Type 2DM and cardiovascular diseases for enhanced patient care.
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Affiliation(s)
- Hema Viswambharan
- Leeds Institute of Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, UK.
| | - Chew Weng Cheng
- Leeds Institute of Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, UK
| | - Kirti Kain
- NHS England & NHS Improvement (North East and Yorkshire), Quarry Hill, Leeds, LS2 7UE, UK
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Nampi PP, Vakurov A, Viswambharan H, Schneider JE, Brydson R, Millner PA, Saha S, Jose G. Barium yttrium fluoride based upconversion nanoparticles as dual mode image contrast agents. Mater Sci Eng C Mater Biol Appl 2021; 124:111937. [PMID: 33947528 DOI: 10.1016/j.msec.2021.111937] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 11/11/2020] [Accepted: 01/31/2021] [Indexed: 11/28/2022]
Abstract
Dual labeled contrast agents could provide better complementary information for bioimaging than available solely from a single modality. In this paper we investigate the suitability of Yb3+ and Er3+-doped BaYF5 upconversion nanoparticles (UCNPs) as both optical and X-ray micro computed tomography (μCT) contrast agents. Stable, aqueous UCNP dispersions were synthesised using a hydrothermal method with the addition of polyethyleneimine (PEI). UCNPs were single crystal and had a truncated cuboidal and/or truncated octahedral morphology, with average particle size of 47 ±9 nm from transmission electron microscopy which was further used to characterize the structure and composition in detail. A zeta potential value of +51 mV was measured for the aqueous nanoparticle dispersions which is beneficial for cell permeability. The outer hydrated PEI layer is also advantageous for the attachment of proteins for targeted delivery in biological systems. The prepared UCNPs were proven to be non-toxic to endothelial cells up to a concentration of 3.5 mg/mL, when assessed using an MTT assay. The particles showed intense green upconversion photoluminescence when excited at a wavelength of 976 nm using a diode laser. Quantitative X-ray μCT contrast imaging confirmed the potential of these UCNPs as X-ray contrast agents and confirming their dual modality for bioimaging.
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Affiliation(s)
- Padmaja Parameswaran Nampi
- School of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom; School of Biomedical Sciences, Faculty of Biological, Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom; Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, United Kingdom.
| | - Alexander Vakurov
- School of Biomedical Sciences, Faculty of Biological, Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Hema Viswambharan
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Jürgen E Schneider
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Rik Brydson
- School of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Paul A Millner
- School of Biomedical Sciences, Faculty of Biological, Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Sikha Saha
- Leeds Institute of Cardiovascular and Metabolic Medicine (LICAMM), Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Gin Jose
- School of Chemical and Process Engineering, Faculty of Engineering and Physical Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom
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7
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Maqbool A, Watt NT, Haywood N, Viswambharan H, Skromna A, Makava N, Visnagri A, Shawer HM, Bridge K, Muminov SK, Griffin K, Beech DJ, Wheatcroft SB, Porter KE, Simmons KJ, Sukumar P, Shah AM, Cubbon RM, Kearney MT, Yuldasheva NY. Divergent effects of genetic and pharmacological inhibition of Nox2 NADPH oxidase on insulin resistance-related vascular damage. Am J Physiol Cell Physiol 2020; 319:C64-C74. [PMID: 32401607 PMCID: PMC7468885 DOI: 10.1152/ajpcell.00389.2019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Insulin resistance leads to excessive endothelial cell (EC) superoxide generation and accelerated atherosclerosis. The principal source of superoxide from the insulin-resistant endothelium is the Nox2 isoform of NADPH oxidase. Here we examine the therapeutic potential of Nox2 inhibition on superoxide generation in saphenous vein ECs (SVECs) from patients with advanced atherosclerosis and type 2 diabetes and on vascular function, vascular damage, and lipid deposition in apolipoprotein E-deficient (ApoE−/−) mice with EC-specific insulin resistance (ESMIRO). To examine the effect of genetic inhibition of Nox2, ESMIRO mice deficient in ApoE−/− and Nox2 (ESMIRO/ApoE−/−/Nox2−/y) were generated and compared with ESMIRO/ApoE−/−/Nox2+/y littermates. To examine the effect of pharmacological inhibition of Nox2, we administered gp91dstat or scrambled peptide to ESMIRO/ApoE−/− mice. SVECs from diabetic patients had increased expression of Nox2 protein with concomitant increase in superoxide generation, which could be reduced by the Nox2 inhibitor gp91dstat. After 12 wk Western diet, ESMIRO/ApoE−/−/Nox2−/y mice had reduced EC superoxide generation and greater aortic relaxation to acetylcholine. ESMIRO/ApoE−/−/Nox2−/y mice developed more lipid deposition in the thoraco-abdominal aorta with multiple foci of elastin fragmentation at the level of the aortic sinus and greater expression of intercellular adhesion molecule-1 (ICAM-1). Gp91dstat reduced EC superoxide and lipid deposition in the thoraco-abdominal aorta of ESMIRO/ApoE−/− mice without causing elastin fragmentation or increased ICAM-1 expression. These results demonstrate that insulin resistance is characterized by increased Nox2-derived vascular superoxide. Complete deletion of Nox2 in mice with EC insulin resistance exacerbates, whereas partial pharmacological Nox2 inhibition protects against, insulin resistance-induced vascular damage.
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Affiliation(s)
- Azhar Maqbool
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Nicole T Watt
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Natalie Haywood
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Hema Viswambharan
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Anna Skromna
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Natalia Makava
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Asjad Visnagri
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Heba M Shawer
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Katherine Bridge
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | | | - Kathryn Griffin
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - David J Beech
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Stephen B Wheatcroft
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Karen E Porter
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Katie J Simmons
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Piruthivi Sukumar
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Ajay M Shah
- British Heart Foundation, Centre of Research Excellence, King's College London, London, United Kingdom
| | - Richard M Cubbon
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Mark T Kearney
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Nadira Y Yuldasheva
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
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8
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Deivasikamani V, Dhayalan S, Abudushalamu Y, Mughal R, Visnagri A, Cuthbertson K, Scragg JL, Munsey TS, Viswambharan H, Muraki K, Foster R, Sivaprasadarao A, Kearney MT, Beech DJ, Sukumar P. Piezo1 channel activation mimics high glucose as a stimulator of insulin release. Sci Rep 2019; 9:16876. [PMID: 31727906 PMCID: PMC6856185 DOI: 10.1038/s41598-019-51518-w] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 09/25/2019] [Indexed: 12/11/2022] Open
Abstract
Glucose and hypotonicity induced cell swelling stimulate insulin release from pancreatic β-cells but the mechanisms are poorly understood. Recently, Piezo1 was identified as a mechanically-activated nonselective Ca2+ permeable cationic channel in a range of mammalian cells. As cell swelling induced insulin release could be through stimulation of Ca2+ permeable stretch activated channels, we hypothesised a role for Piezo1 in cell swelling induced insulin release. Two rat β-cell lines (INS-1 and BRIN-BD11) and freshly-isolated mouse pancreatic islets were studied. Intracellular Ca2+ measurements were performed using the fura-2 Ca2+ indicator dye and ionic current was recorded by whole cell patch-clamp. Piezo1 agonist Yoda1, a competitive antagonist of Yoda1 (Dooku1) and an inactive analogue of Yoda1 (2e) were used as chemical probes. Piezo1 mRNA and insulin secretion were measured by RT-PCR and ELISA respectively. Piezo1 mRNA was detected in both β-cell lines and mouse islets. Yoda1 evoked Ca2+ entry was inhibited by Yoda1 antagonist Dooku1 as well as other Piezo1 inhibitors gadolinium and ruthenium red, and not mimicked by 2e. Yoda1, but not 2e, stimulated Dooku1-sensitive insulin release from β-cells and pancreatic islets. Hypotonicity and high glucose increased intracellular Ca2+ and enhanced Yoda1 Ca2+ influx responses. Yoda1 and hypotonicity induced insulin release were significantly inhibited by Piezo1 specific siRNA. Pancreatic islets from mice with haploinsufficiency of Piezo1 released less insulin upon exposure to Yoda1. The data show that Piezo1 channel agonist induces insulin release from β-cell lines and mouse pancreatic islets suggesting a role for Piezo1 in cell swelling induced insulin release. Hence Piezo1 agonists have the potential to be used as enhancers of insulin release.
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Affiliation(s)
- Vijayalakshmi Deivasikamani
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Savitha Dhayalan
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Yilizila Abudushalamu
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Romana Mughal
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Asjad Visnagri
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Kevin Cuthbertson
- School of Chemistry, Faculty of Mathematics and Physical Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Jason L Scragg
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Tim S Munsey
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Hema Viswambharan
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Katsuhiko Muraki
- School of Pharmacy, Aichi-Gakuin University, 1-100 Kusumoto, Chikusa, Nagoya, 464-8650, Japan
| | - Richard Foster
- School of Chemistry, Faculty of Mathematics and Physical Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Asipu Sivaprasadarao
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Mark T Kearney
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - David J Beech
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom
| | - Piruthivi Sukumar
- Leeds Institute for Cardiovascular and Metabolic Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, LS2 9JT, United Kingdom.
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9
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Drozd M, Yuldasheva NY, Maqbool A, Viswambharan H, Watt NT, Palin V, Galloway S, Skromna A, Makava N, Wheatcroft SB, Kearney MT, Cubbon RM. P8 INCREASING ENDOTHELIAL INSULIN-LIKE GROWTH FACTOR-1 RECEPTOR EXPRESSION REDUCES CIRCULATING LEUKOCYTES AND PROTECTS AGAINST ATHEROSCLEROSIS. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy216.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Drozd
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - N Y Yuldasheva
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - A Maqbool
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - H Viswambharan
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - N T Watt
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - V Palin
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - S Galloway
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - A Skromna
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - N Makava
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - S B Wheatcroft
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - M T Kearney
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
| | - R M Cubbon
- Leeds Institute for Cardiovascular and Metabolic Medicine, LIGHT Laboratories, University of Leeds, UK
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10
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Sengupta A, Patel PA, Yuldasheva NY, Mughal RS, Galloway S, Viswambharan H, Walker AMN, Aziz A, Smith J, Ali N, Mercer BN, Imrie H, Sukumar P, Wheatcroft SB, Kearney MT, Cubbon RM. Endothelial Insulin Receptor Restoration Rescues Vascular Function in Male Insulin Receptor Haploinsufficient Mice. Endocrinology 2018; 159:2917-2925. [PMID: 29796592 PMCID: PMC6047419 DOI: 10.1210/en.2018-00215] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 04/25/2018] [Indexed: 11/19/2022]
Abstract
Reduced systemic insulin signaling promotes endothelial dysfunction and diminished endogenous vascular repair. We investigated whether restoration of endothelial insulin receptor expression could rescue this phenotype. Insulin receptor knockout (IRKO) mice were crossed with mice expressing a human insulin receptor endothelial cell-specific overexpression (hIRECO) to produce IRKO-hIRECO progeny. No metabolic differences were noted between IRKO and IRKO-hIRECO mice in glucose and insulin tolerance tests. In contrast with control IRKO littermates, IRKO-hIRECO mice exhibited normal blood pressure and aortic vasodilatation in response to acetylcholine, comparable to parameters noted in wild type littermates. These phenotypic changes were associated with increased basal- and insulin-stimulated nitric oxide production. IRKO-hIRECO mice also demonstrated normalized endothelial repair after denuding arterial injury, which was associated with rescued endothelial cell migration in vitro but not with changes in circulating progenitor populations or culture-derived myeloid angiogenic cells. These data show that restoration of endothelial insulin receptor expression alone is sufficient to prevent the vascular dysfunction caused by systemically reduced insulin signaling.
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Affiliation(s)
- Anshuman Sengupta
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Peysh A Patel
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Nadira Y Yuldasheva
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Romana S Mughal
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Stacey Galloway
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Hema Viswambharan
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Andrew M N Walker
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Amir Aziz
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Jessica Smith
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Noman Ali
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Ben N Mercer
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Helen Imrie
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Piruthivi Sukumar
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Stephen B Wheatcroft
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Mark T Kearney
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
| | - Richard M Cubbon
- Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Leeds, United Kingdom
- Correspondence: Richard M. Cubbon, MBChB, PhD, Leeds Institute of Cardiovascular and Metabolic Medicine, LIGHT Laboratories, The University of Leeds, Clarendon Way, Leeds, LS2 9JT, United Kingdom. E-mail:
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11
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Watt NT, Gage MC, Patel PA, Viswambharan H, Sukumar P, Galloway S, Yuldasheva NY, Imrie H, Walker AMN, Griffin KJ, Makava N, Skromna A, Bridge K, Beech DJ, Schurmans S, Wheatcroft SB, Kearney MT, Cubbon RM. Endothelial SHIP2 Suppresses Nox2 NADPH Oxidase-Dependent Vascular Oxidative Stress, Endothelial Dysfunction, and Systemic Insulin Resistance. Diabetes 2017; 66:2808-2821. [PMID: 28830894 DOI: 10.2337/db17-0062] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 08/04/2017] [Indexed: 11/13/2022]
Abstract
Shc homology 2-containing inositol 5' phosphatase-2 (SHIP2) is a lipid phosphatase that inhibits insulin signaling downstream of phosphatidylinositol 3-kinase (PI3K); its role in vascular function is poorly understood. To examine its role in endothelial cell (EC) biology, we generated mice with catalytic inactivation of one SHIP2 allele selectively in ECs (ECSHIP2Δ/+). Hyperinsulinemic-euglycemic clamping studies revealed that ECSHIP2Δ/+ was resistant to insulin-stimulated glucose uptake in adipose tissue and skeletal muscle compared with littermate controls. ECs from ECSHIP2Δ/+ mice had increased basal expression and activation of PI3K downstream targets, including Akt and endothelial nitric oxide synthase, although incremental activation by insulin and shear stress was impaired. Insulin-mediated vasodilation was blunted in ECSHIP2Δ/+ mice, as was aortic nitric oxide bioavailability. Acetylcholine-induced vasodilation was also impaired in ECSHIP2Δ/+ mice, which was exaggerated in the presence of a superoxide dismutase/catalase mimetic. Superoxide abundance was elevated in ECSHIP2Δ/+ ECs and was suppressed by PI3K and NADPH oxidase 2 inhibitors. These findings were phenocopied in healthy human ECs after SHIP2 silencing. Our data suggest that endothelial SHIP2 is required to maintain normal systemic glucose homeostasis and prevent oxidative stress-induced endothelial dysfunction.
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Affiliation(s)
- Nicole T Watt
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Matthew C Gage
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Peysh A Patel
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Hema Viswambharan
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Piruthivi Sukumar
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stacey Galloway
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Nadira Y Yuldasheva
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Helen Imrie
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Andrew M N Walker
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Kathryn J Griffin
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Natalia Makava
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Anna Skromna
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Katherine Bridge
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - David J Beech
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stéphane Schurmans
- Laboratory of Functional Genetics, GIGA Research Centre, Université de Liège, Liège, Belgium
| | - Stephen B Wheatcroft
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Mark T Kearney
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K.
| | - Richard M Cubbon
- Leeds Institute of Cardiovascular and Metabolic Medicine, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
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12
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Rode B, Shi J, Endesh N, Drinkhill MJ, Webster PJ, Lotteau SJ, Bailey MA, Yuldasheva NY, Ludlow MJ, Cubbon RM, Li J, Futers TS, Morley L, Gaunt HJ, Marszalek K, Viswambharan H, Cuthbertson K, Baxter PD, Foster R, Sukumar P, Weightman A, Calaghan SC, Wheatcroft SB, Kearney MT, Beech DJ. Piezo1 channels sense whole body physical activity to reset cardiovascular homeostasis and enhance performance. Nat Commun 2017; 8:350. [PMID: 28839146 PMCID: PMC5571199 DOI: 10.1038/s41467-017-00429-3] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 06/20/2017] [Indexed: 01/24/2023] Open
Abstract
Mammalian biology adapts to physical activity but the molecular mechanisms sensing the activity remain enigmatic. Recent studies have revealed how Piezo1 protein senses mechanical force to enable vascular development. Here, we address Piezo1 in adult endothelium, the major control site in physical activity. Mice without endothelial Piezo1 lack obvious phenotype but close inspection reveals a specific effect on endothelium-dependent relaxation in mesenteric resistance artery. Strikingly, the Piezo1 is required for elevated blood pressure during whole body physical activity but not blood pressure during inactivity. Piezo1 is responsible for flow-sensitive non-inactivating non-selective cationic channels which depolarize the membrane potential. As fluid flow increases, depolarization increases to activate voltage-gated Ca2+ channels in the adjacent vascular smooth muscle cells, causing vasoconstriction. Physical performance is compromised in mice which lack endothelial Piezo1 and there is weight loss after sustained activity. The data suggest that Piezo1 channels sense physical activity to advantageously reset vascular control.The mechanisms that regulate the body's response to exercise are poorly understood. Here, Rode et al. show that the mechanically activated cation channel Piezo1 is a molecular sensor of physical exercise in the endothelium that triggers endothelial communication to mesenteric vessel muscle cells, leading to vasoconstriction.
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Affiliation(s)
- Baptiste Rode
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Jian Shi
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Naima Endesh
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | | | - Peter J Webster
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Sabine J Lotteau
- School of Biomedical Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Marc A Bailey
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | | | | | | | - Jing Li
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - T Simon Futers
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Lara Morley
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Hannah J Gaunt
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | | | | | | | - Paul D Baxter
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - Richard Foster
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK
| | | | - Andrew Weightman
- School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, M13 9PL, UK
| | - Sarah C Calaghan
- School of Biomedical Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | | | - Mark T Kearney
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK
| | - David J Beech
- Schools of Medicine, University of Leeds, Leeds, LS2 9JT, UK.
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13
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Patel P, Watt N, Gage M, Yuldasheva N, Viswambharan H, Walker A, Ali N, Galloway S, Mughal R, Wheatcroft S, Schurmans S, Kearney M, Cubbon R. 232 Endothelial ship2 knockout causes nox2 nadph oxidase-dependent oxidative stress and endothelial dysfunction. Heart 2017. [DOI: 10.1136/heartjnl-2017-311726.230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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14
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Viswambharan H, Yuldasheva NY, Sengupta A, Imrie H, Gage MC, Haywood N, Walker AM, Skromna A, Makova N, Galloway S, Shah P, Sukumar P, Porter KE, Grant PJ, Shah AM, Santos CX, Li J, Beech DJ, Wheatcroft SB, Cubbon RM, Kearney MT. Selective Enhancement of Insulin Sensitivity in the Endothelium In Vivo Reveals a Novel Proatherosclerotic Signaling Loop. Circ Res 2017; 120:784-798. [DOI: 10.1161/circresaha.116.309678] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 11/30/2016] [Accepted: 12/05/2016] [Indexed: 12/21/2022]
Abstract
Rationale:
In the endothelium, insulin stimulates endothelial NO synthase (eNOS) to generate the antiatherosclerotic signaling radical NO. Insulin-resistant type 2 diabetes mellitus is associated with reduced NO availability and accelerated atherosclerosis. The effect of enhancing endothelial insulin sensitivity on NO availability is unclear.
Objective:
To answer this question, we generated a mouse with endothelial cell (EC)–specific overexpression of the human insulin receptor (hIRECO) using the Tie2 promoter–enhancer.
Methods and Results:
hIRECO demonstrated significant endothelial dysfunction measured by blunted endothelium-dependent vasorelaxation to acetylcholine, which was normalized by a specific Nox2 NADPH oxidase inhibitor. Insulin-stimulated phosphorylation of protein kinase B was increased in hIRECO EC as was Nox2 NADPH oxidase–dependent generation of superoxide, whereas insulin-stimulated and shear stress–stimulated eNOS activations were blunted. Phosphorylation at the inhibitory residue Y657 of eNOS and expression of proline-rich tyrosine kinase 2 that phosphorylates this residue were significantly higher in hIRECO EC. Inhibition of proline-rich tyrosine kinase 2 improved insulin-induced and shear stress–induced eNOS activation in hIRECO EC.
Conclusions:
Enhancing insulin sensitivity specifically in EC leads to a paradoxical decline in endothelial function, mediated by increased tyrosine phosphorylation of eNOS and excess Nox2-derived superoxide. Increased EC insulin sensitivity leads to a proatherosclerotic imbalance between NO and superoxide. Inhibition of proline-rich tyrosine kinase 2 restores insulin-induced and shear stress–induced NO production. This study demonstrates for the first time that increased endothelial insulin sensitivity leads to a proatherosclerotic imbalance between NO and superoxide.
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Affiliation(s)
- Hema Viswambharan
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Nadira Y. Yuldasheva
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Anshuman Sengupta
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Helen Imrie
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Matthew C. Gage
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Natalie Haywood
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Andrew M.N. Walker
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Anna Skromna
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Natallia Makova
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Stacey Galloway
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Pooja Shah
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Piruthivi Sukumar
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Karen E. Porter
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Peter J. Grant
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Ajay M. Shah
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Celio X.C. Santos
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Jing Li
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - David J. Beech
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Stephen B. Wheatcroft
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Richard M. Cubbon
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
| | - Mark T. Kearney
- From the Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, United Kingdom (H.V., N.Y.Y., A.S., H.I., N.H., A.M.N.W., A.S., N.M., S.G., P. Shah, P. Sukumar, K.E.P., P.J.G., J.L., D.J.B., S.B.W., R.M.C., M.T.K.); Division of Medicine, Department of Metabolism & Experimental Therapeutics, University College London, United Kingdom (M.C.G.); and British Heart Foundation Centre of Research Excellence, King’s College London, United Kingdom (A.M.S., C.X.C.S.)
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Viswambharan H, Kearney MT. Response by Viswambharan and Kearney to Letter Regarding Article, "Selective Enhancement of Insulin Sensitivity in the Endothelium In Vivo Reveals a Novel Proatherosclerotic Signaling Loop". Circ Res 2017; 120:e4-e5. [PMID: 28209800 DOI: 10.1161/circresaha.117.310510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Hema Viswambharan
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds School of Medicine, University of Leeds, Leeds, United Kingdom
| | - Mark T Kearney
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds School of Medicine, University of Leeds, Leeds, United Kingdom
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16
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Haywood NJ, Cordell PA, Tang KY, Makova N, Yuldasheva NY, Imrie H, Viswambharan H, Bruns AF, Cubbon RM, Kearney MT, Wheatcroft SB. Insulin-Like Growth Factor Binding Protein 1 Could Improve Glucose Regulation and Insulin Sensitivity Through Its RGD Domain. Diabetes 2017; 66:287-299. [PMID: 28108607 DOI: 10.2337/db16-0997] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 10/26/2016] [Indexed: 11/13/2022]
Abstract
Low circulating levels of insulin-like growth factor binding protein 1 (IGFBP-1) are associated with insulin resistance and predict the development of type 2 diabetes. IGFBP-1 can affect cellular functions independently of IGF binding through an Arg-Gly-Asp (RGD) integrin-binding motif. Whether causal mechanisms underlie the favorable association of high IGFBP-1 levels with insulin sensitivity and whether these could be exploited therapeutically remain unexplored. We used recombinant IGFBP-1 and a synthetic RGD-containing hexapeptide in complementary in vitro signaling assays and in vivo metabolic profiling in obese mice to investigate the effects of IGFBP-1 and its RGD domain on insulin sensitivity, insulin secretion, and whole-body glucose regulation. The RGD integrin-binding domain of IGFBP-1, through integrin engagement, focal adhesion kinase, and integrin-linked kinase, enhanced insulin sensitivity and insulin secretion in C2C12 myotubes and INS-1 832/13 pancreatic β-cells. Both acute administration and chronic infusion of an RGD synthetic peptide to obese C57BL/6 mice improved glucose clearance and insulin sensitivity. These favorable effects on metabolic homeostasis suggest that the RGD integrin-binding domain of IGFBP-1 may be a promising candidate for therapeutic development in the field of insulin resistance.
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Affiliation(s)
- Natalie J Haywood
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Paul A Cordell
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Kar Yeun Tang
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Natallia Makova
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Nadira Y Yuldasheva
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Helen Imrie
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Hema Viswambharan
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Alexander F Bruns
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Richard M Cubbon
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Mark T Kearney
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K
| | - Stephen B Wheatcroft
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, Faculty of Medicine and Health, University of Leeds, Leeds, West Yorkshire, U.K.
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17
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Viswambharan H, Sukumar P, Sengupta A, Cubbon RM, Imrie H, Gage M, Haywood N, Yuldasheva N, Skromna A, Gatenby VK, Galloway S, Turner J, Santos C, Shah AM, Beech DJ, Wheatcroft SB, Kearney MT. D Increasing Insulin Sensitivity in the Endothelium Leads to Reduced Nitric Oxide Bioavailability. Heart 2015. [DOI: 10.1136/heartjnl-2015-308066.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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18
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Viswambharan H, Sukumar P, Sengupta A, Cubbon R, Imrie H, Gage M, Haywood N, Yuldasheva N, Skromna A, Gatenby K, Galloway S, Santos C, Shah A, Beech D, Wheatcroft S, Kearney M, Shah P. 184 Increasing Insulin Sensitivity in the Endothelium Leads to Reduced Nitric Oxide Bioavailability. Heart 2015. [DOI: 10.1136/heartjnl-2015-308066.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Cubbon RM, Yuldasheva NY, Viswambharan H, Mercer BN, Baliga V, Stephen SL, Askham J, Sukumar P, Skromna A, Mughal RS, Walker AMN, Bruns A, Bailey MA, Galloway S, Imrie H, Gage MC, Rakobowchuk M, Li J, Porter KE, Ponnambalam S, Wheatcroft SB, Beech DJ, Kearney MT. Restoring Akt1 activity in outgrowth endothelial cells from South Asian men rescues vascular reparative potential. Stem Cells 2015; 32:2714-23. [PMID: 24916783 DOI: 10.1002/stem.1766] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 05/09/2014] [Accepted: 05/12/2014] [Indexed: 01/09/2023]
Abstract
Recent data suggest reduced indices of vascular repair in South Asian men, a group at increased risk of cardiovascular events. Outgrowth endothelial cells (OEC) represent an attractive tool to study vascular repair in humans and may offer potential in cell-based repair therapies. We aimed to define and manipulate potential mechanisms of impaired vascular repair in South Asian (SA) men. In vitro and in vivo assays of vascular repair and angiogenesis were performed using OEC derived from SA men and matched European controls, prior defining potentially causal molecular mechanisms. SA OEC exhibited impaired colony formation, migration, and in vitro angiogenesis, associated with decreased expression of the proangiogenic molecules Akt1 and endothelial nitric oxide synthase (eNOS). Transfusion of European OEC into immunodeficient mice after wire-induced femoral artery injury augmented re-endothelialization, in contrast with SA OEC and vehicle; SA OEC also failed to promote angiogenesis after induction of hind limb ischemia. Expression of constitutively active Akt1 (E17KAkt), but not green fluorescent protein control, in SA OEC increased in vitro angiogenesis, which was abrogated by a NOS antagonist. Moreover, E17KAkt expressing SA OEC promoted re-endothelialization of wire-injured femoral arteries, and perfusion recovery of ischemic limbs, to a magnitude comparable with nonmanipulated European OEC. Silencing Akt1 in European OEC recapitulated the functional deficits noted in SA OEC. Reduced signaling via the Akt/eNOS axis is causally linked with impaired OEC-mediated vascular repair in South Asian men. These data prove the principle of rescuing marked reparative dysfunction in OEC derived from these men.
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Affiliation(s)
- Richard M Cubbon
- Leeds Multidisciplinary Cardiovascular Research Centre, LIGHT Laboratories, The University of Leeds, Clarendon Way, Leeds, United Kingdom
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Shah P, Viswambharan H, Gatenby VK, Imrie H, Haywood N, Galloway S, Sengupta A, Cubbon RM, Gage M, Skromna A, Makova N, Grant P, Yuldasheva N, Beech DJ, Wheatcroft SB, Kearney MT. ENDOTHELIAL-SPECIFIC OVEREXPRESSION OF MUTATED INSULIN-LIKE GROWTH FACTOR-1 RECEPTORS (IGF-1R) ENHANCES ENDOTHELIAL INSULIN SENSITIVITY AND VASCULAR HYDROGEN PEROXIDE GENERATION. Heart 2014. [DOI: 10.1136/heartjnl-2014-306916.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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21
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Yuldasheva NY, Rashid ST, Haywood NJ, Cordell P, Mughal R, Viswambharan H, Imrie H, Sukumar P, Cubbon RM, Aziz A, Gage M, Mbonye KA, Smith J, Galloway S, Skromna A, Scott DJA, Kearney MT, Wheatcroft SB. Haploinsufficiency of the Insulin-Like Growth Factor-1 Receptor Enhances Endothelial Repair and Favorably Modifies Angiogenic Progenitor Cell Phenotype. Arterioscler Thromb Vasc Biol 2014; 34:2051-8. [DOI: 10.1161/atvbaha.114.304121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objectives—
Defective endothelial regeneration predisposes to adverse arterial remodeling and is thought to contribute to cardiovascular disease in type 2 diabetes mellitus. We recently demonstrated that the type 1 insulin-like growth factor receptor (IGF1R) is a negative regulator of insulin sensitivity and nitric oxide bioavailability. In this report, we examined partial deletion of the IGF1R as a potential strategy to enhance endothelial repair.
Approach and Results—
We assessed endothelial regeneration after wire injury in mice and abundance and function of angiogenic progenitor cells in mice with haploinsufficiency of the IGF1R (IGF1R
+/−
). Endothelial regeneration after arterial injury was accelerated in IGF1R
+/−
mice. Although the yield of angiogenic progenitor cells was lower in IGF1R
+/−
mice, these angiogenic progenitor cells displayed enhanced adhesion, increased secretion of insulin-like growth factor-1, and enhanced angiogenic capacity. To examine the relevance of IGF1R manipulation to cell-based therapy, we transfused IGF1R
+/−
bone marrow–derived CD117
+
cells into wild-type mice. IGF1R
+/−
cells accelerated endothelial regeneration after arterial injury compared with wild-type cells and did not alter atherosclerotic lesion formation.
Conclusions—
Haploinsufficiency of the IGF1R is associated with accelerated endothelial regeneration in vivo and enhanced tube forming and adhesive potential of angiogenic progenitor cells in vitro. Partial deletion of IGF1R in transfused bone marrow–derived CD117
+
cells enhanced their capacity to promote endothelial regeneration without altering atherosclerosis. Our data suggest that manipulation of the IGF1R could be exploited as novel therapeutic approach to enhance repair of the arterial wall after injury.
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Affiliation(s)
- Nadira Y. Yuldasheva
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Sheikh Tawqeer Rashid
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Natalie J. Haywood
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Paul Cordell
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Romana Mughal
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Hema Viswambharan
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Helen Imrie
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Piruthivi Sukumar
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Richard M. Cubbon
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Amir Aziz
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Matthew Gage
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Kamatamu Amanda Mbonye
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Jessica Smith
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Stacey Galloway
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Anna Skromna
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - D. Julian A. Scott
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Mark T. Kearney
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
| | - Stephen B. Wheatcroft
- From the Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom
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Gage M, Viswambharan H, Sukumar P, Cubbon R, Imrie H, Galloway S, Abbas A, Yuldasheva N, Smith J, Skromna A, Grant P, Gatenby V, Beech D, Schurmans S, Wheatcroft S, Kearney M. 184 Temporospatial Effects of Endothelium Specific Inhibition of Shc Homology 2 -containing Inositol 5´ Phosphatase 2 on Nitric Oxide Bioavailability and Whole Body Insulin Sensitivity. Heart 2014. [DOI: 10.1136/heartjnl-2014-306118.184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sengupta A, Viswambharan H, Yuldasheva N, Ben Mercer NA, Walker A, Galloway S, Aziz A, Gage M, Imrie H, Kate Gatenby V, Skromna A, Wheatcroft S, Kearney M, Mughal R, Cubbon R. 169 Endothelial Insulin Sensitisation Enhances Vascular Repair and Aortic Vasomotor Function in Systemic Insulin Resistance. Heart 2014. [DOI: 10.1136/heartjnl-2014-306118.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Viswambharan H, Sukumar P, Sengupta A, Cubbon R, Imrie H, Gage M, Haywood N, Skromna A, Kate Gatenby V, Galloway S, Turner J, Yuldasheva N, Shah A, Santos C, Beech D, Wheatcroft S, Kearney M. 173 Increasing Insulin Sensitivity in the Endothelium Leads to Reduced Nitric Oxide Bioavailability. Heart 2014. [DOI: 10.1136/heartjnl-2014-306118.173] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Viswambharan H, Sukumar P, Gage M, Sengupta A, Imrie H, Yuldasheva N, Galloway S, Cubbon R, Wheatcroft S, Kearney MT. Enhancing endothelial insulin sensitivity reduces NO bioavailability: a role for NADPH oxidase-derived reactive oxygen species. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gage MC, Yuldasheva NY, Viswambharan H, Sukumar P, Cubbon RM, Galloway S, Imrie H, Skromna A, Smith J, Jackson CL, Kearney MT, Wheatcroft SB. Endothelium-specific insulin resistance leads to accelerated atherosclerosis in areas with disturbed flow patterns: a role for reactive oxygen species. Atherosclerosis 2013; 230:131-9. [PMID: 23958265 DOI: 10.1016/j.atherosclerosis.2013.06.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 06/19/2013] [Accepted: 06/20/2013] [Indexed: 01/29/2023]
Abstract
OBJECTIVE Systemic insulin resistance is associated with a portfolio of risk factors for atherosclerosis development. We sought to determine whether insulin resistance specifically at the level of the endothelium promotes atherosclerosis and to examine the potential involvement of reactive oxygen species. METHODS We cross-bred mice expressing a dominant negative mutant human insulin receptor specifically in the endothelium (ESMIRO) with ApoE(-/-) mice to examine the effect of endothelium-specific insulin resistance on atherosclerosis. RESULTS ApoE(-/-)/ESMIRO mice had similar blood pressure, plasma lipids and whole-body glucose tolerance, but blunted endothelial insulin signalling, in comparison to ApoE(-/-) mice. Atherosclerosis was significantly increased in ApoE(-/-)/ESMIRO mice at the aortic sinus (226 ± 16 versus 149 ± 24 × 10(3) μm(2), P = 0.01) and lesser curvature of the aortic arch (12.4 ± 1.2% versus 9.4 ± 0.9%, P = 0.035). Relaxation to acetylcholine was blunted in aorta from ApoE(-/-)/ESMIRO mice (Emax 65 ± 41% versus 103 ± 6%, P = 0.02) and was restored by the superoxide dismutase mimetic MnTMPyP (Emax 112 ± 15% versus 65 ± 41%, P = 0.048). Basal generation of superoxide was increased 1.55 fold (P = 0.01) in endothelial cells from ApoE(-/-)/ESMIRO mice and was inhibited by the NADPH oxidase inhibitor gp91ds-tat (-12 ± 0.04%, P = 0.04), the NO synthase inhibitor L-NMMA (-8 ± 0.02%, P = 0.001) and the mitochondrial specific inhibitor rotenone (-23 ± 0.04%, P = 0.006). CONCLUSIONS Insulin resistance specifically at the level of the endothelium leads to acceleration of atherosclerosis in areas with disturbed flow patterns such as the aortic sinus and the lesser curvature of the aorta. We have identified a potential role for increased generation of reactive oxygen species from multiple enzymatic sources in promoting atherosclerosis in this setting.
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Affiliation(s)
- Matthew C Gage
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, United Kingdom
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Sukumar P, Viswambharan H, Imrie H, Cubbon RM, Yuldasheva N, Gage M, Galloway S, Skromna A, Kandavelu P, Santos CX, Gatenby VK, Smith J, Beech DJ, Wheatcroft SB, Channon KM, Shah AM, Kearney MT. Nox2 NADPH oxidase has a critical role in insulin resistance-related endothelial cell dysfunction. Diabetes 2013; 62:2130-4. [PMID: 23349484 PMCID: PMC3661635 DOI: 10.2337/db12-1294] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Insulin resistance is characterized by excessive endothelial cell generation of potentially cytotoxic concentrations of reactive oxygen species. We examined the role of NADPH oxidase (Nox) and specifically Nox2 isoform in superoxide generation in two complementary in vivo models of human insulin resistance (endothelial specific and whole body). Using three complementary methods to measure superoxide, we demonstrated higher levels of superoxide in insulin-resistant endothelial cells, which could be pharmacologically inhibited both acutely and chronically, using the Nox inhibitor gp91ds-tat. Similarly, insulin resistance-induced impairment of endothelial-mediated vasorelaxation could also be reversed using gp91ds-tat. siRNA-mediated knockdown of Nox2, which was specifically elevated in insulin-resistant endothelial cells, significantly reduced superoxide levels. Double transgenic mice with endothelial-specific insulin resistance and deletion of Nox2 showed reduced superoxide production and improved vascular function. This study identifies Nox2 as the central molecule in insulin resistance-mediated oxidative stress and vascular dysfunction. It also establishes pharmacological inhibition of Nox2 as a novel therapeutic target in insulin resistance-related vascular disease.
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Affiliation(s)
- Piruthivi Sukumar
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Hema Viswambharan
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Helen Imrie
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Richard M. Cubbon
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Nadira Yuldasheva
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Matthew Gage
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stacey Galloway
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Anna Skromna
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Parkavi Kandavelu
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Celio X. Santos
- Kings College London British Heart Foundation Centre of Excellence, London, U.K
| | - V. Kate Gatenby
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Jessica Smith
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - David J. Beech
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stephen B. Wheatcroft
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Keith M. Channon
- University of Oxford British Heart Foundation Centre of Excellence, Oxford, U.K
| | - Ajay M. Shah
- Kings College London British Heart Foundation Centre of Excellence, London, U.K
| | - Mark T. Kearney
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
- Corresponding author: Mark T. Kearney,
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Gage M, Wheatcroft S, Abbas A, Imrie H, Viswambharan H, Galloway S, Sukumar P, Cubbon R, Smith J, Schurmans S, Jacoby M, Dubois E, Kearney M. 241 ENDOTHELIAL SHIP2 CONFERS AGE-DEPENDENT CONTRASTING AFFECTS ON WHOLE BODY GLUCOSE HOMEOSTASIS AND VASCULAR FUNCTION. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sengupta A, Viswambharan H, Yuldasheva N, Mercer B, Aziz A, Imrie H, Gage M, Gatenby V, Skromna A, Wheatcroft S, Kearney M, Cubbon R. 163 VASCULAR ENDOTHELIAL INSULIN SENSITISATION REDUCES BLOOD PRESSURE AND PROMOTES ENDOTHELIAL REPAIR IN THE CONTEXT OF GLOBAL INSULIN RESISTANCE. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sukumar P, Viswambharan H, Imrie H, Cubbon R, Yuldasheva N, Gage M, Galloway S, Skromna A, Kandavelu P, Santos CX, Gatenby K, Smith J, Beech DJ, Wheatcroft SB, Channon KM, Shah AM, Kearney MT. 195 TARGETING NOX2 NADPH OXIDASE IN INSULIN RESISTANCE RELATED ENDOTHELIAL DYSFUNCTION. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Sukumar P, Viswambharan H, Imrie H, Cubbon RM, Yuldasheva N, Gage M, Galloway S, Skromna A, Kandavelu P, Santos CX, Gatenby VK, Smith J, Beech DJ, Wheatcroft SB, Channon KM, Shah AM, Kearney MT. E: TARGETING NOX2 NADPH OXIDASE IN INSULIN RESISTANCE RELATED ENDOTHELIAL DYSFUNCTION. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mercer B, Yuldasheva N, Viswambharan H, Baliga V, Stephen S, Askham J, Sukumar P, Skromna A, Mughal R, Imrie H, Gage M, Rakobowchuk M, Li J, Porter K, Ponnambalam S, Wheatcroft S, Beech D, Kearney M, Cubbon R. 201 RESTORING AKT ACTIVITY IN LATE OUTGROWTH ENDOTHELIAL PROGENITOR CELLS FROM HUMANS AT HIGH CARDIOVASCULAR RISK RESCUES THEIR ANGIOGENIC CAPACITY. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Viswambharan H, Sukumar P, Gage M, Imrie H, Sengupta A, Turner J, Yuldasheva N, Skromna A, Galloway S, Smith J, Cubbon R, Wheatcroft S, Kearney M. 171 NOX2-DERIVED REACTIVE OXYGEN SPECIES CAUSES VASCULAR DYSFUNCTION IN MURINE MODEL OF ENDOTHELIAL INSULIN SENSITIVITY AND ACTIVATION OF NRF2 TRANSCRIPTION FACTOR. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Imrie H, Viswambharan H, Sukumar P, Abbas A, Cubbon RM, Yuldasheva N, Gage M, Smith J, Galloway S, Skromna A, Rashid ST, Futers TS, Xuan S, Gatenby VK, Grant PJ, Channon KM, Beech DJ, Wheatcroft SB, Kearney MT. Novel role of the IGF-1 receptor in endothelial function and repair: studies in endothelium-targeted IGF-1 receptor transgenic mice. Diabetes 2012; 61:2359-68. [PMID: 22733797 PMCID: PMC3425420 DOI: 10.2337/db11-1494] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
We recently demonstrated that reducing IGF-1 receptor (IGF-1R) numbers in the endothelium enhances nitric oxide (NO) bioavailability and endothelial cell insulin sensitivity. In the present report, we aimed to examine the effect of increasing IGF-1R on endothelial cell function and repair. To examine the effect of increasing IGF-1R in the endothelium, we generated mice overexpressing human IGF-1R in the endothelium (human IGF-1R endothelium-overexpressing mice [hIGFREO]) under direction of the Tie2 promoter enhancer. hIGFREO aorta had reduced basal NO bioavailability (percent constriction to N(G)-monomethyl-l-arginine [mean (SEM) wild type 106% (30%); hIGFREO 48% (10%)]; P < 0.05). Endothelial cells from hIGFREO had reduced insulin-stimulated endothelial NO synthase activation (mean [SEM] wild type 170% [25%], hIGFREO 58% [3%]; P = 0.04) and insulin-stimulated NO release (mean [SEM] wild type 4,500 AU [1,000], hIGFREO 1,500 AU [700]; P < 0.05). hIGFREO mice had enhanced endothelium regeneration after denuding arterial injury (mean [SEM] percent recovered area, wild type 57% [2%], hIGFREO 47% [5%]; P < 0.05) and enhanced endothelial cell migration in vitro. The IGF-1R, although reducing NO bioavailability, enhances in situ endothelium regeneration. Manipulating IGF-1R in the endothelium may be a useful strategy to treat disorders of vascular growth and repair.
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Affiliation(s)
- Helen Imrie
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Hema Viswambharan
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Piruthivi Sukumar
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Afroze Abbas
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Richard M. Cubbon
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Nadira Yuldasheva
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Matthew Gage
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Jessica Smith
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stacey Galloway
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Anna Skromna
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Sheik Taqweer Rashid
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - T. Simon Futers
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Shouhong Xuan
- Department of Genetics and Development, Columbia University, New York, New York
| | - V. Kate Gatenby
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Peter J. Grant
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Keith M. Channon
- University of Oxford British Heart Foundation Centre of Research Excellence, Oxford, U.K
| | - David J. Beech
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stephen B. Wheatcroft
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Mark T. Kearney
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
- Corresponding author: Mark T. Kearney,
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Cubbon RM, Viswambharan H, Baliga V, Yuldasheva N, Stephen S, Askham J, Mercer BN, Rakobowchuk MR, Sukumar P, Skromna A, Li J, Ponnambalam S, Porter KE, Wheatcroft SB, Beech DJ, Kearney MT. A Gene-based restoration of Akt activity in endothelial progenitor cells from human subjects at high cardiovascular risk rescues vascular reparative capacity. Heart 2012. [DOI: 10.1136/heartjnl-2012-301877a.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Sukumar P, Viswambharan H, Imrie H, Cubbon RM, Yuldasheva N, Gage M, Galloway S, Skromna A, Smith J, Gatenby K, Beech DJ, Wheatcroft SB, Channon KM, Shah AM, Kearney MT. 105 NOX2 NADPH—oxidase a novel target to prevent insulin resistance related endothelial cell dysfunction. Heart 2012. [DOI: 10.1136/heartjnl-2012-301877b.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Gage MC, Yuldasheva NY, Viswambharan H, Sukumar P, Cubbon RM, Galloway S, Imrie H, Skromna A, Smith J, Jackson C, Kearney MT, Wheatcroft SB. D Endothelium specific insulin resistance leads to accelerated atherosclerosis: a role for reactive oxygen species. Heart 2012. [DOI: 10.1136/heartjnl-2012-301877a.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Imrie H, Viswambharan H, Sukumar P, Abbas A, Yuldasheva N, Gage M, Galloway S, Wheatcroft SB, Kearney MT. 109 Overexpression of endothelial insulin-like growth factor-1 receptors (IGF-1R): a novel role for IGF-1R in endothelial function and repair. Heart 2012. [DOI: 10.1136/heartjnl-2012-301877b.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Viswambharan H, Sukumar P, Gage MC, Yuldasheva N, Skromna A, Imrie H, Galloway S, Smith J, Cubbon R, Wheatcroft SB, Kearney MT. 104 Enhancing endothelial insulin sensitivity reduces nitric oxide bioavailability: a role for NADPH oxidase-derived reactive oxygen species. Heart 2012. [DOI: 10.1136/heartjnl-2012-301877b.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Rajwani A, Ezzat V, Smith J, Yuldasheva NY, Duncan ER, Gage M, Cubbon RM, Kahn MB, Imrie H, Abbas A, Viswambharan H, Aziz A, Sukumar P, Vidal-Puig A, Sethi JK, Xuan S, Shah AM, Grant PJ, Porter KE, Kearney MT, Wheatcroft SB. Increasing circulating IGFBP1 levels improves insulin sensitivity, promotes nitric oxide production, lowers blood pressure, and protects against atherosclerosis. Diabetes 2012; 61:915-24. [PMID: 22357965 PMCID: PMC3314358 DOI: 10.2337/db11-0963] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 12/29/2011] [Indexed: 12/02/2022]
Abstract
Low concentrations of insulin-like growth factor (IGF) binding protein-1 (IGFBP1) are associated with insulin resistance, diabetes, and cardiovascular disease. We investigated whether increasing IGFBP1 levels can prevent the development of these disorders. Metabolic and vascular phenotype were examined in response to human IGFBP1 overexpression in mice with diet-induced obesity, mice heterozygous for deletion of insulin receptors (IR(+/-)), and ApoE(-/-) mice. Direct effects of human (h)IGFBP1 on nitric oxide (NO) generation and cellular signaling were studied in isolated vessels and in human endothelial cells. IGFBP1 circulating levels were markedly suppressed in dietary-induced obese mice. Overexpression of hIGFBP1 in obese mice reduced blood pressure, improved insulin sensitivity, and increased insulin-stimulated NO generation. In nonobese IR(+/-) mice, overexpression of hIGFBP1 reduced blood pressure and improved insulin-stimulated NO generation. hIGFBP1 induced vasodilatation independently of IGF and increased endothelial NO synthase (eNOS) activity in arterial segments ex vivo, while in endothelial cells, hIGFBP1 increased eNOS Ser(1177) phosphorylation via phosphatidylinositol 3-kinase signaling. Finally, in ApoE(-/-) mice, overexpression of hIGFBP1 reduced atherosclerosis. These favorable effects of hIGFBP1 on insulin sensitivity, blood pressure, NO production, and atherosclerosis suggest that increasing IGFBP1 concentration may be a novel approach to prevent cardiovascular disease in the setting of insulin resistance and diabetes.
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Affiliation(s)
- Adil Rajwani
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Vivienne Ezzat
- Department of Cardiology, Cardiovascular Division, Kings College London British Heart Foundation Centre of Excellence, London, U.K
| | - Jessica Smith
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Nadira Y. Yuldasheva
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Edward R. Duncan
- Department of Cardiology, Cardiovascular Division, Kings College London British Heart Foundation Centre of Excellence, London, U.K
| | - Matthew Gage
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Richard M. Cubbon
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Matthew B. Kahn
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Helen Imrie
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Afroze Abbas
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Hema Viswambharan
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Amir Aziz
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Piruthivi Sukumar
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Antonio Vidal-Puig
- Department of Clinical Biochemistry, University of Cambridge, Cambridge, U.K
| | - Jaswinder K. Sethi
- Department of Clinical Biochemistry, University of Cambridge, Cambridge, U.K
| | - Shouhong Xuan
- Department of Genetics and Development, Columbia University Medical Center, New York, New York
| | - Ajay M. Shah
- Department of Cardiology, Cardiovascular Division, Kings College London British Heart Foundation Centre of Excellence, London, U.K
| | - Peter J. Grant
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Karen E. Porter
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Mark T. Kearney
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stephen B. Wheatcroft
- Division of Cardiovascular and Diabetes Research, Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
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Abbas A, Imrie H, Viswambharan H, Sukumar P, Rajwani A, Cubbon RM, Gage M, Smith J, Galloway S, Yuldeshava N, Kahn M, Xuan S, Grant PJ, Channon KM, Beech DJ, Wheatcroft SB, Kearney MT. The insulin-like growth factor-1 receptor is a negative regulator of nitric oxide bioavailability and insulin sensitivity in the endothelium. Diabetes 2011; 60:2169-78. [PMID: 21677284 PMCID: PMC3142083 DOI: 10.2337/db11-0197] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE In mice, haploinsufficiency of the IGF-1 receptor (IGF-1R(+/-)), at a whole-body level, increases resistance to inflammation and oxidative stress, but the underlying mechanisms are unclear. We hypothesized that by forming insulin-resistant heterodimers composed of one IGF-1Rαβ and one insulin receptor (IR), IRαβ complex in endothelial cells (ECs), IGF-1R reduces free IR, which reduces EC insulin sensitivity and generation of the antioxidant/anti-inflammatory signaling radical nitric oxide (NO). RESEARCH DESIGN AND METHODS Using a number of complementary gene-modified mice with reduced IGF-1R at a whole-body level and specifically in EC, and complementary studies in EC in vitro, we examined the effect of changing IGF-1R/IR stoichiometry on EC insulin sensitivity and NO bioavailability. RESULTS IGF-1R(+/-) mice had enhanced insulin-mediated glucose lowering. Aortas from these mice were hypocontractile to phenylephrine (PE) and had increased basal NO generation and augmented insulin-mediated NO release from EC. To dissect EC from whole-body effects we generated mice with EC-specific knockdown of IGF-1R. Aortas from these mice were also hypocontractile to PE and had increased basal NO generation. Whole-body and EC deletion of IGF-1R reduced hybrid receptor formation. By reducing IGF-1R in IR-haploinsufficient mice we reduced hybrid formation, restored insulin-mediated vasorelaxation in aorta, and insulin stimulated NO release in EC. Complementary studies in human umbilical vein EC in which IGF-1R was reduced using siRNA confirmed that reducing IGF-1R has favorable effects on NO bioavailability and EC insulin sensitivity. CONCLUSIONS These data demonstrate that IGF-1R is a critical negative regulator of insulin sensitivity and NO bioavailability in the endothelium.
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Affiliation(s)
- Afroze Abbas
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Helen Imrie
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Hema Viswambharan
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Piruthivi Sukumar
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Adil Rajwani
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Richard M. Cubbon
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Matthew Gage
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Jessica Smith
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stacey Galloway
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Nadira Yuldeshava
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Matthew Kahn
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Shouhong Xuan
- Department of Genetics and Development, Columbia University, New York, New York
| | - Peter J. Grant
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Keith M. Channon
- British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, U.K
| | - David J. Beech
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Stephen B. Wheatcroft
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
| | - Mark T. Kearney
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, U.K
- Corresponding author: Mark T. Kearney,
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Abbas A, Viswambharan H, Imrie H, Rajwani A, Kahn M, Gage M, Cubbon R, Surr J, Wheatcroft S, Kearney M. A Endothelial cell nitric oxide bioavailability and insulin sensitivity are regulated by IGF-1 and insulin receptor levels. Heart 2011. [DOI: 10.1136/heartjnl-2011-300110.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Gage MC, Yuldasheva N, Jackson C, Kearney M, Imrie H, Viswambharan H, Kahn M, Smith J, Galloway S, Cubbon R, Sukumar P, Aziz A, Wheatcroft S. 139 Endothelial specific insulin resistance promotes the development of atherosclerosis. Heart 2011. [DOI: 10.1136/heartjnl-2011-300198.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kahn MB, Yuldasheva N, Cubbon R, Surr J, Rashid S, Viswambharan H, Imrie H, Abbas A, Rajwani A, Gage M, Kearney MT, Wheatcroft S. C Insulin resistance impairs angiogenic progenitor cell function and delays endothelial repair following vascular injury. Heart 2011. [DOI: 10.1136/heartjnl-2011-300110.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kahn MB, Yuldasheva NY, Cubbon RM, Smith J, Rashid ST, Viswambharan H, Imrie H, Abbas A, Rajwani A, Aziz A, Baliga V, Sukumar P, Gage M, Kearney MT, Wheatcroft SB. Insulin resistance impairs circulating angiogenic progenitor cell function and delays endothelial regeneration. Diabetes 2011; 60:1295-303. [PMID: 21317296 PMCID: PMC3064103 DOI: 10.2337/db10-1080] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Circulating angiogenic progenitor cells (APCs) participate in endothelial repair after arterial injury. Type 2 diabetes is associated with fewer circulating APCs, APC dysfunction, and impaired endothelial repair. We set out to determine whether insulin resistance adversely affects APCs and endothelial regeneration. RESEARCH DESIGN AND METHODS We quantified APCs and assessed APC mobilization and function in mice hemizygous for knockout of the insulin receptor (IRKO) and wild-type (WT) littermate controls. Endothelial regeneration after femoral artery wire injury was also quantified after APC transfusion. RESULTS IRKO mice, although glucose tolerant, had fewer circulating Sca-1(+)/Flk-1(+) APCs than WT mice. Culture of mononuclear cells demonstrated that IRKO mice had fewer APCs in peripheral blood, but not in bone marrow or spleen, suggestive of a mobilization defect. Defective vascular endothelial growth factor-stimulated APC mobilization was confirmed in IRKO mice, consistent with reduced endothelial nitric oxide synthase (eNOS) expression in bone marrow and impaired vascular eNOS activity. Paracrine angiogenic activity of APCs from IRKO mice was impaired compared with those from WT animals. Endothelial regeneration of the femoral artery after denuding wire injury was delayed in IRKO mice compared with WT. Transfusion of mononuclear cells from WT mice normalized the impaired endothelial regeneration in IRKO mice. Transfusion of c-kit(+) bone marrow cells from WT mice also restored endothelial regeneration in IRKO mice. However, transfusion of c-kit(+) cells from IRKO mice was less effective at improving endothelial repair. CONCLUSIONS Insulin resistance impairs APC function and delays endothelial regeneration after arterial injury. These findings support the hypothesis that insulin resistance per se is sufficient to jeopardize endogenous vascular repair. Defective endothelial repair may be normalized by transfusion of APCs from insulin-sensitive animals but not from insulin-resistant animals.
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Rajwani A, Surr J, Porter KE, Viswambharan H, Imrie H, Abbas A, Cubbon R, Ezzat V, Kearney MT, Wheatcroft SB. E IGFBP-1 upregulates vascular nitric oxide via PI-3-K activation and rescues endothelial function in murine models of insulin resistance: Abstract E Table 1. Heart 2010. [DOI: 10.1136/hrt.2010.196113.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chadjichristos CE, Scheckenbach KEL, van Veen TAB, Richani Sarieddine MZ, de Wit C, Yang Z, Roth I, Bacchetta M, Viswambharan H, Foglia B, Dudez T, van Kempen MJA, Coenjaerts FEJ, Miquerol L, Deutsch U, Jongsma HJ, Chanson M, Kwak BR. Endothelial-specific deletion of connexin40 promotes atherosclerosis by increasing CD73-dependent leukocyte adhesion. Circulation 2010; 121:123-31. [PMID: 20026782 DOI: 10.1161/circulationaha.109.867176] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Endothelial dysfunction is the initiating event of atherosclerosis. The expression of connexin40 (Cx40), an endothelial gap junction protein, is decreased during atherogenesis. In the present report, we sought to determine whether Cx40 contributes to the development of the disease. METHODS AND RESULTS Mice with ubiquitous deletion of Cx40 are hypertensive, a risk factor for atherosclerosis. Consequently, we generated atherosclerosis-susceptible mice with endothelial-specific deletion of Cx40 (Cx40del mice). Cx40del mice were indeed not hypertensive. The progression of atherosclerosis was increased in Cx40del mice after 5 and 10 weeks of a high-cholesterol diet, and spontaneous lesions were observed in the aortic sinuses of young mice without such a diet. These lesions showed monocyte infiltration into the intima, increased expression of vascular cell adhesion molecule-1, and decreased expression of the ecto-enzyme CD73 in the endothelium. The proinflammatory phenotype of Cx40del mice was confirmed in another model of induced leukocyte recruitment from the lung microcirculation. Endothelial CD73 is known to induce antiadhesion signaling via the production of adenosine. We found that reducing Cx40 expression in vitro with small interfering RNA or antisense decreased CD73 expression and activity and increased leukocyte adhesion to mouse endothelial cells. These effects were reversed by an adenosine receptor agonist. CONCLUSIONS Cx40-mediated gap junctional communication contributes to a quiescent nonactivated endothelium by propagating adenosine-evoked antiinflammatory signals between endothelial cells. Alteration in this mechanism by targeting Cx40 promotes leukocyte adhesion to the endothelium, thus accelerating atherosclerosis.
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Affiliation(s)
- C E Chadjichristos
- Division of Cardiology, Geneva University Hospitals and University of Geneva, Geneva, Switzerland
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Imrie H, Abbas A, Viswambharan H, Rajwani A, Cubbon RM, Gage M, Kahn M, Ezzat VA, Duncan ER, Grant PJ, Ajjan R, Wheatcroft SB, Kearney MT. Vascular insulin-like growth factor-I resistance and diet-induced obesity. Endocrinology 2009; 150:4575-82. [PMID: 19608653 DOI: 10.1210/en.2008-1641] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Obesity and type 2 diabetes mellitus are characterized by insulin resistance, reduced bioavailability of the antiatherosclerotic signaling molecule nitric oxide (NO), and accelerated atherosclerosis. IGF-I, the principal growth-stimulating peptide, which shares many of the effects of insulin, may, like insulin, also be involved in metabolic and vascular homeostasis. We examined the effects of IGF-I on NO bioavailability and the effect of obesity/type 2 diabetes mellitus on IGF-I actions at a whole-body level and in the vasculature. In aortic rings IGF-I blunted phenylephrine-mediated vasoconstriction and relaxed rings preconstricted with phenylephrine, an effect blocked by N(G)-monomethyl L-arginine. IGF-I increased NO synthase activity to an extent similar to that seen with insulin and in-vivo IGF-I led to serine phosphorylation of endothelial NO synthase (eNOS). Mice rendered obese using a high-fat diet were less sensitive to the glucose-lowering effects of insulin and IGF-I. IGF-I increased aortic phospho-eNOS levels in lean mice, an effect that was blunted in obese mice. eNOS activity in aortae of lean mice increased 1.6-fold in response to IGF-I compared with obese mice. IGF-I-mediated vasorelaxation was blunted in obese mice. These data demonstrate that IGF-I increases eNOS phosphorylation in-vivo, increases eNOS activity, and leads to NO-dependent relaxation of conduit vessels. Obesity is associated with resistance to IGF-I at a whole-body level and in the endothelium. Vascular IGF-I resistance may represent a novel therapeutic target to prevent or slow the accelerated vasculopathy seen in humans with obesity or type 2 diabetes mellitus.
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Affiliation(s)
- Helen Imrie
- Division of Cardiovascular and Diabetes Research, Leeds Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds LS2 9JT, United Kingdom
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Viswambharan H, Carvas JM, Antic V, Marecic A, Jud C, Zaugg CE, Ming XF, Montani JP, Albrecht U, Yang Z. Mutation of the circadian clock gene Per2 alters vascular endothelial function. Circulation 2007; 115:2188-95. [PMID: 17404161 DOI: 10.1161/circulationaha.106.653303] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The circadian clock regulates biological processes including cardiovascular function and metabolism. In the present study, we investigated the role of the circadian clock gene Period2 (Per2) in endothelial function in a mouse model. METHODS AND RESULTS Compared with the wild-type littermates, mice with Per2 mutation exhibited impaired endothelium-dependent relaxations to acetylcholine in aortic rings suspended in organ chambers. During transition from the inactive to active phase, this response was further increased in the wild-type mice but further decreased in the Per2 mutants. The endothelial dysfunction in the Per2 mutants was also observed with ionomycin, which was improved by the cyclooxygenase inhibitor indomethacin. No changes in the expression of endothelial acetylcholine-M3 receptor or endothelial nitric oxide synthase protein but increased cyclooxygenase-1 (not cyclooxygenase-2) protein levels were observed in the aortas of the Per2 mutants. Compared with Per2 mutants, a greater endothelium-dependent relaxation to ATP was observed in the wild-type mice, which was reduced by indomethacin. In quiescent aortic rings, ATP caused greater endothelium-dependent contractions in the Per2 mutants than in the wild-type mice, contractions that were abolished by indomethacin. The endothelial dysfunction in the Per2 mutant mice is not associated with hypertension or dyslipidemia. CONCLUSIONS Mutation in the Per2 gene in mice is associated with aortic endothelial dysfunction involving decreased production of NO and vasodilatory prostaglandin(s) and increased release of cyclooxygenase-1-derived vasoconstrictor(s). The results suggest an important role of the Per2 gene in maintenance of normal cardiovascular functions.
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Affiliation(s)
- Hema Viswambharan
- Department of Medicine, Division of Physiology, University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland
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Zhu S, Viswambharan H, Gajanayake T, Ming XF, Yang Z. Sirolimus increases tissue factor expression but not activity in cultured human vascular smooth muscle cells. BMC Cardiovasc Disord 2005; 5:22. [PMID: 16018822 PMCID: PMC1190166 DOI: 10.1186/1471-2261-5-22] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2005] [Accepted: 07/15/2005] [Indexed: 11/10/2022] Open
Abstract
Background Sirolimus-eluting stents (CYPHER stents) demonstrated remarkable efficacy in reducing restenosis rates in patients with coronary artery disease. There is a concern of sub-acute and late stent thrombosis. Tissue factor (TF) is critical in thrombosis. This study investigated the effect of sirolimus on TF expression and activity in cultured human vascular smooth muscle cells (SMCs). Methods SMCs were cultured from human saphenous veins and aortas. Quiescent cells were stimulated with sirolimus (0.1 – 20 ng/ml) over 24 hours. Cellular TF expression and activity released into culture medium were measured. The effect of sirolimus on activation of mammalian target of rapamycin (mTOR) was measured by phosphorylation of the substrate p70s6k at T389, and activation of RhoA was measured by pull-down assay. Results Sirolimus increased TF protein level in cultured human SMCs in a concentration and time-dependent manner (about 2-fold, p < 0.01) reaching maximal effect at 5 ng/ml. The stimulation of TF expression by sirolimus was associated with inhibition of basal activity of mTOR. No effects of sirolimus on RhoA or p38mapk activation that are positive regulators of TF in vascular wall cells were observed. The stimulation of TF expression by sirolimus (20 ng/ml) was prevented by the HMG-CoA reductase inhibitor fluvastatin (1 μmol/L). However, no increase in TF activity released from SMC into culture medium was observed after sirolimus treatment. Conclusion Although sirolimus stimulates TF protein expression in human SMC associated with inhibition of mTOR, it does not enhance TF activity released from the cells, suggesting a relatively safe profile of CYPHER stents. The inhibition of TF expression by fluvastatin favors clinical use of statins in patients undergoing coronary stenting.
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Affiliation(s)
- Shengsi Zhu
- Vascular Biology, Department of Medicine, Division of Physiology,University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland
- Cardiovascular Department, 1Affiliated Hospital of Dalian Medical University, Dalian, P.R. China
| | - Hema Viswambharan
- Vascular Biology, Department of Medicine, Division of Physiology,University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland
| | - Thusitha Gajanayake
- Vascular Biology, Department of Medicine, Division of Physiology,University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland
| | - Xiu-Fen Ming
- Vascular Biology, Department of Medicine, Division of Physiology,University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland
| | - Zhihong Yang
- Vascular Biology, Department of Medicine, Division of Physiology,University of Fribourg, Rue du Musée 5, CH-1700 Fribourg, Switzerland
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