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Akbar N, Forteath C, Hussain MS, Reyskens K, Belch JJF, Lang CC, Mordi IR, Bhalraam U, Arthur JSC, Khan F. Mitogen and Stress-Activated Kinases 1 and 2 Mediate Endothelial Dysfunction. Int J Mol Sci 2021; 22:ijms22168655. [PMID: 34445361 PMCID: PMC8395442 DOI: 10.3390/ijms22168655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/27/2021] [Accepted: 07/28/2021] [Indexed: 11/16/2022] Open
Abstract
Inflammation promotes endothelial dysfunction, but the underlying mechanisms remain poorly defined in vivo. Using translational vascular function testing in myocardial infarction patients, a situation where inflammation is prevalent, and knock-out (KO) mouse models we demonstrate a role for mitogen-activated-protein-kinases (MAPKs) in endothelial dysfunction. Myocardial infarction significantly lowers mitogen and stress kinase 1/2 (MSK1/2) expression in peripheral blood mononuclear cells and diminished endothelial function. To further understand the role of MSK1/2 in vascular function we developed in vivo animal models to assess vascular responses to vasoactive drugs using laser Doppler imaging. Genetic deficiency of MSK1/2 in mice increased plasma levels of pro-inflammatory cytokines and promoted endothelial dysfunction, through attenuated production of nitric oxide (NO), which were further exacerbated by cholesterol feeding. MSK1/2 are activated by toll-like receptors through MyD88. MyD88 KO mice showed preserved endothelial function and reduced plasma cytokine expression, despite significant hypercholesterolemia. MSK1/2 kinases interact with MAPK-activated proteins 2/3 (MAPKAP2/3), which limit cytokine synthesis. Cholesterol-fed MAPKAP2/3 KO mice showed reduced plasma cytokine expression and preservation of endothelial function. MSK1/2 plays a significant role in the development of endothelial dysfunction and may provide a novel target for intervention to reduce vascular inflammation. Activation of MSK1/2 could reduce pro-inflammatory responses and preserve endothelial vasodilator function before development of significant vascular disease.
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Affiliation(s)
- Naveed Akbar
- The Institute of Cardiovascular Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.F.); (M.S.H.); (J.J.F.B.); (U.B.)
- Correspondence: (N.A.); (F.K.); Tel.: +44-13-8238-3531 (F.K.); Fax: +44-13-8263-2333 (F.K.)
| | - Calum Forteath
- The Institute of Cardiovascular Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.F.); (M.S.H.); (J.J.F.B.); (U.B.)
| | - Muhammad S. Hussain
- The Institute of Cardiovascular Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.F.); (M.S.H.); (J.J.F.B.); (U.B.)
| | - Kathleen Reyskens
- Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK; (K.R.); (J.S.C.A.)
| | - Jill J. F. Belch
- The Institute of Cardiovascular Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.F.); (M.S.H.); (J.J.F.B.); (U.B.)
| | - Chim C. Lang
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.C.L.); (I.R.M.)
| | - Ify R. Mordi
- Division of Molecular and Clinical Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.C.L.); (I.R.M.)
| | - U Bhalraam
- The Institute of Cardiovascular Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.F.); (M.S.H.); (J.J.F.B.); (U.B.)
| | - J. Simon C. Arthur
- Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK; (K.R.); (J.S.C.A.)
| | - Faisel Khan
- The Institute of Cardiovascular Research, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, UK; (C.F.); (M.S.H.); (J.J.F.B.); (U.B.)
- Correspondence: (N.A.); (F.K.); Tel.: +44-13-8238-3531 (F.K.); Fax: +44-13-8263-2333 (F.K.)
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Meakin PJ, Coull BM, Tuharska Z, McCaffery C, Akoumianakis I, Antoniades C, Brown J, Griffin KJ, Platt F, Ozber CH, Yuldasheva NY, Makava N, Skromna A, Prescott A, McNeilly AD, Siddiqui M, Palmer CN, Khan F, Ashford ML. Elevated circulating amyloid concentrations in obesity and diabetes promote vascular dysfunction. J Clin Invest 2021; 130:4104-4117. [PMID: 32407295 PMCID: PMC7410081 DOI: 10.1172/jci122237] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 04/29/2020] [Indexed: 12/11/2022] Open
Abstract
Diabetes, obesity, and Alzheimer’s disease (AD) are associated with vascular complications and impaired nitric oxide (NO) production. Furthermore, increased β-site amyloid precursor protein–cleaving (APP-cleaving) enzyme 1 (BACE1), APP, and β-amyloid (Aβ) are linked with vascular disease development and increased BACE1 and Aβ accompany hyperglycemia and hyperlipidemia. However, the causal relationship between obesity and diabetes, increased Aβ, and vascular dysfunction is unclear. We report that diet-induced obesity (DIO) in mice increased plasma and vascular Aβ42 that correlated with decreased NO bioavailability, endothelial dysfunction, and increased blood pressure. Genetic or pharmacological reduction of BACE1 activity and Aβ42 prevented and reversed, respectively, these outcomes. In contrast, expression of human mutant APP in mice or Aβ42 infusion into control diet–fed mice to mimic obese levels impaired NO production, vascular relaxation, and raised blood pressure. In humans, increased plasma Aβ42 correlated with diabetes and endothelial dysfunction. Mechanistically, higher Aβ42 reduced endothelial NO synthase (eNOS), cyclic GMP (cGMP), and protein kinase G (PKG) activity independently of diet, whereas endothelin-1 was increased by diet and Aβ42. Lowering Aβ42 reversed the DIO deficit in the eNOS/cGMP/PKG pathway and decreased endothelin-1. Our findings suggest that BACE1 inhibitors may have therapeutic value in the treatment of vascular disease associated with diabetes.
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Affiliation(s)
- Paul J Meakin
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom.,Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Bethany M Coull
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Zofia Tuharska
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Christopher McCaffery
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Ioannis Akoumianakis
- Cardiovascular Medicine Division, Level 6 West Wing, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| | - Charalambos Antoniades
- Cardiovascular Medicine Division, Level 6 West Wing, John Radcliffe Hospital, Headington, Oxford, United Kingdom
| | - Jane Brown
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Kathryn J Griffin
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Fiona Platt
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Claire H Ozber
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Nadira Y Yuldasheva
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Natallia Makava
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Anna Skromna
- Discovery and Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, United Kingdom
| | - Alan Prescott
- School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Alison D McNeilly
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Moneeza Siddiqui
- Division of Population Health & Genomics, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Colin Na Palmer
- Division of Population Health & Genomics, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Faisel Khan
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
| | - Michael Lj Ashford
- Division of Systems Medicine, School of Medicine, Ninewells Hospital and Medical School, Dundee, United Kingdom
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Garcia-Vaz E, McNeilly AD, Berglund LM, Ahmad A, Gallagher JR, Dutius Andersson AM, McCrimmon RJ, Zetterqvist AV, Gomez MF, Khan F. Inhibition of NFAT Signaling Restores Microvascular Endothelial Function in Diabetic Mice. Diabetes 2020; 69:424-435. [PMID: 31806622 DOI: 10.2337/db18-0870] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 11/30/2019] [Indexed: 11/13/2022]
Abstract
Central to the development of diabetic macro- and microvascular disease is endothelial dysfunction, which appears well before any clinical sign but, importantly, is potentially reversible. We previously demonstrated that hyperglycemia activates nuclear factor of activated T cells (NFAT) in conduit and medium-sized resistance arteries and that NFAT blockade abolishes diabetes-driven aggravation of atherosclerosis. In this study, we test whether NFAT plays a role in the development of endothelial dysfunction in diabetes. NFAT-dependent transcriptional activity was elevated in skin microvessels of diabetic Akita (Ins2 +/- ) mice when compared with nondiabetic littermates. Treatment of diabetic mice with the NFAT blocker A-285222 reduced NFATc3 nuclear accumulation and NFAT-luciferase transcriptional activity in skin microvessels, resulting in improved microvascular function, as assessed by laser Doppler imaging and iontophoresis of acetylcholine and localized heating. This improvement was abolished by pretreatment with the nitric oxide (NO) synthase inhibitor l-N G-nitro-l-arginine methyl ester, while iontophoresis of the NO donor sodium nitroprusside eliminated the observed differences. A-285222 treatment enhanced dermis endothelial NO synthase expression and plasma NO levels of diabetic mice. It also prevented induction of inflammatory cytokines interleukin-6 and osteopontin, lowered plasma endothelin-1 and blood pressure, and improved mouse survival without affecting blood glucose. In vivo inhibition of NFAT may represent a novel therapeutic modality to preserve endothelial function in diabetes.
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Affiliation(s)
- Eliana Garcia-Vaz
- Department of Clinical Sciences in Malmö, Lund University Diabetes Centre, Lund University, Lund, Sweden
| | - Alison D McNeilly
- Division of Clinical and Molecular Medicine, Ninewells Hospital and University of Dundee, Dundee, U.K
| | - Lisa M Berglund
- Department of Clinical Sciences in Malmö, Lund University Diabetes Centre, Lund University, Lund, Sweden
| | - Abrar Ahmad
- Department of Clinical Sciences in Malmö, Lund University Diabetes Centre, Lund University, Lund, Sweden
| | - Jennifer R Gallagher
- Division of Clinical and Molecular Medicine, Ninewells Hospital and University of Dundee, Dundee, U.K
| | | | - Rory J McCrimmon
- Division of Clinical and Molecular Medicine, Ninewells Hospital and University of Dundee, Dundee, U.K
| | - Anna V Zetterqvist
- Department of Clinical Sciences in Malmö, Lund University Diabetes Centre, Lund University, Lund, Sweden
| | - Maria F Gomez
- Department of Clinical Sciences in Malmö, Lund University Diabetes Centre, Lund University, Lund, Sweden
| | - Faisel Khan
- Division of Clinical and Molecular Medicine, Ninewells Hospital and University of Dundee, Dundee, U.K.
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In-vivo correlations between skin metabolic oscillations and vasomotion in wild-type mice and in a model of oxidative stress. Sci Rep 2019; 9:186. [PMID: 30655574 PMCID: PMC6336806 DOI: 10.1038/s41598-018-36970-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022] Open
Abstract
Arterioles in the cutaneous microcirculation frequently display an oscillatory phenomenon defined vasomotion, consistent with periodic diameter variations in the micro-vessels associated with particular physiological or abnormal conditions. The cellular mechanisms underlying vasomotion and its physiological role have not been completely elucidated. Various mechanisms were demonstrated, based on cell Ca2+ oscillations determined by the activity of channels in the plasma membrane or sarcoplasmic reticulum of vascular cells. However, the possible engagement in vasomotion of cell metabolic oscillations of mitochondrial or glycolytic origin has been poorly explored. Metabolic oscillations associated with the production of ATP energy were previously described in cells, while limited studies have investigated these fluctuations in-vivo. Here, we characterised a low-frequency metabolic oscillator (MO-1) in skin from live wild-type and Nrf2−/− mice, by combination of fluorescence spectroscopy and wavelet transform processing technique. Furthermore, the relationships between metabolic and microvascular oscillators were examined during phenylephrine-induced vasoconstriction. We found a significant interaction between MO-1 and the endothelial EDHF vasomotor mechanism that was reduced in the presence of oxidative stress (Nrf2−/− mice). Our findings suggest indirectly that metabolic oscillations may be involved in the mechanisms underlying endothelium-mediated skin vasomotion, which might be altered in the presence of metabolic disturbance.
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Akbar N, Nanda S, Belch J, Cohen P, Khan F. An important role for A20-binding inhibitor of nuclear factor-kB-1 (ABIN1) in inflammation-mediated endothelial dysfunction: an in vivo study in ABIN1 (D485N) mice. Arthritis Res Ther 2015; 17:22. [PMID: 25648164 PMCID: PMC4342941 DOI: 10.1186/s13075-015-0543-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 01/23/2015] [Indexed: 01/28/2023] Open
Abstract
Introduction The link between cardiovascular disease (CVD) and patients with chronic inflammation is not clearly understood. We examined a knock-in mouse expressing a poly-ubiquitin-binding-defective mutant of the protein ABIN1 (ABIN1(D485N)), which develops a systemic lupus erythematosus-like autoimmune disease because of the hyperactivation of IκB kinases (IκKs) and mitogen-activated protein kinases (MAPKs). These mice were used to determine the potential role of these signaling pathways in inflammation-mediated CVD development. Methods Laser Doppler imaging in combination with the iontophoresis of vasoactive chemicals were used to assess endothelium-dependent vasodilatation in vivo in ABIN1 (D485N)) mutant defective (n = 29) and wild-type (WT) control (n = 26) mice. Measurements were made at baseline, and animals were subdivided to receive either chow or a proatherogenic diet for 4 weeks, after which, follow-up assessments were made. Paired and unpaired t tests, and ANOVA with post hoc Bonferroni correction were used for statistical significance at P <0.05. Results Endothelium-dependent vasodilatation to acetylcholine was attenuated at 4 weeks in ABIN1(D485N)-chow-fed mice compared with age-matched WT-chow-fed mice (P <0.05). The magnitude of attenuation was similar to that observed in WT-cholesterol-fed animals (versus WT-chow, P <0.01). ABIN1(D485N)-cholesterol-fed mice had the poorest endothelium-dependent responses compared with other groups (P <0.001). ABIN1(D485N)-chow-fed mice had increased plasma interleukin-6 (IL-6) levels (versus WT-chow, P <0.001), and this was further elevated in ABIN1(D485N)-cholesterol-fed mice (versus ABIN1(D485N)-chow; P <0.05). IL-1α was significantly greater in all groups compared with WT-chow (P <0.01). ABIN1(D485N) mice showed significant cardiac hypertrophy (P <0.05). Conclusions The ABIN(D485N) mice display endothelial dysfunction and cardiac hypertrophy, which is possibly mediated through IL-6 and, to a lesser degree, IL-1α. These results suggest that the ABIN1-mediated hyperactivation of IKKs and MAPKs might mediate chronic inflammation and CVD development.
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Affiliation(s)
- Naveed Akbar
- Vascular and Inflammatory Diseases Research Unit, Medical Research Institute, Division of Cardiovascular and Diabetes Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK.
| | - Sambit Nanda
- MRC Protein Phosphorylation and Ubiquitylation Unit, Sir James Black Centre, College of Life Sciences, University of Dundee, Dundee, UK.
| | - Jill Belch
- Vascular and Inflammatory Diseases Research Unit, Medical Research Institute, Division of Cardiovascular and Diabetes Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK.
| | - Philip Cohen
- MRC Protein Phosphorylation and Ubiquitylation Unit, Sir James Black Centre, College of Life Sciences, University of Dundee, Dundee, UK.
| | - Faisel Khan
- Vascular and Inflammatory Diseases Research Unit, Medical Research Institute, Division of Cardiovascular and Diabetes Medicine, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK.
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AKBAR N, SOKOLOVSKI S, DUNAEV A, BELCH J, RAFAILOV E, KHAN F. In vivo
noninvasive measurement of skin autofluorescence biomarkers relate to cardiovascular disease in mice. J Microsc 2014; 255:42-8. [DOI: 10.1111/jmi.12135] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 04/09/2014] [Indexed: 02/03/2023]
Affiliation(s)
- N. AKBAR
- Vascular and Inflammatory Diseases Research Unit; Division of Cardiovascular and Diabetes Medicine; Medical Research Institute; Ninewells Hospital and Medical School; University of Dundee; Dundee Scotland
| | - S. SOKOLOVSKI
- Photonics and Nanoscience Group; Division of Physics; The School of Engineering; Physics and Mathematics; University of Dundee; Dundee Scotland
| | - A. DUNAEV
- Photonics and Nanoscience Group; Division of Physics; The School of Engineering; Physics and Mathematics; University of Dundee; Dundee Scotland
| | - J.J.F. BELCH
- Vascular and Inflammatory Diseases Research Unit; Division of Cardiovascular and Diabetes Medicine; Medical Research Institute; Ninewells Hospital and Medical School; University of Dundee; Dundee Scotland
| | - E. RAFAILOV
- Photonics and Nanoscience Group; Division of Physics; The School of Engineering; Physics and Mathematics; University of Dundee; Dundee Scotland
| | - F. KHAN
- Vascular and Inflammatory Diseases Research Unit; Division of Cardiovascular and Diabetes Medicine; Medical Research Institute; Ninewells Hospital and Medical School; University of Dundee; Dundee Scotland
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Rousseau P, Mahé G. [Endothelial function: role, assessment and limits]. ACTA ACUST UNITED AC 2013; 39:47-56. [PMID: 24355615 DOI: 10.1016/j.jmv.2013.11.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 10/24/2013] [Indexed: 12/16/2022]
Abstract
For several years, detecting and preventing cardiovascular diseases have become a major issue. Different methods have been developed to evaluate endothelial function. Endothelial dysfunction is one of the first steps leading to atherosclerosis. This review presents an insight into endothelial function, the interests of its assessment and methods for studying endothelial function. To date, the vascular endothelium must be considered as a specific organ with its own functions that contribute to the homeostasis of the cardiovascular system. Endothelial dysfunction typically corresponds to a decrease of nitric oxide NO bioavailability. Biological or physico-chemical methods may be used to assess dysfunction. Biological methods allow measuring NO metabolites and pro-inflammatory and vasoconstrictor mediators released by the endothelium. The physico-chemical methods include intra-coronary injections, plethysmography, flow-mediated dilation (FMD), digital plethysmography and optical techniques using laser (laser Doppler single-point, laser Doppler imager, laser speckle contrast imaging) that can be coupled with provocation tests (iontophoresis, microdialysis, post-ischemic hyperemia, local heating). The principle of each technique and its use in clinical practice are discussed. Studying endothelial dysfunction is a particularly promising field because of new drugs being developed. Nevertheless, assessment methodology still needs further development to enable reliable, non-invasive, reproducible, and inexpensive ways to analyze endothelial dysfunction.
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Affiliation(s)
- C Puissant
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - P Abraham
- Service des explorations fonctionnelles vasculaires, centre hospitalier universitaire, 49933 Angers cedex 9, France; Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France
| | - S Durand
- EA 4334 motricity, interactions, and performance, LUNAM université, université du Maine, 72085 Le Mans cedex 9, France
| | - A Humeau-Heurtier
- Laboratoire d'ingénierie des systèmes automatisés (LISA), LUNAM université, université d'Angers, 49000 Angers, France
| | - S Faure
- Stress oxydant et pathologies métaboliques (SOPAM), Inserm U1063, LUNAM université, université d'Angers, 40045 Angers, France
| | - P Rousseau
- Département de chirurgie plastique, centre hospitalier universitaire, 49933 Angers cedex 9, France
| | - G Mahé
- Biologie neurovasculaire et mitochondriale intégrée (BNMI) - unité mixte UMR CNRS 6214/Inserm U 1083, faculté de médecine, LUNAM université, 49045 Angers, France; Pôle imagerie médicale, centre hospitalier universitaire Pontchaillou, 2, avenue du Pr-Léon-Bernard, 35033 Rennes cedex 9, France.
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Puissant C, Abraham P, Durand S, Humeau-Heurtier A, Faure S, Lefthériotis G, Rousseau P, Mahé G. Reproducibility of non-invasive assessment of skin endothelial function using laser Doppler flowmetry and laser speckle contrast imaging. PLoS One 2013; 8:e61320. [PMID: 23620742 PMCID: PMC3631172 DOI: 10.1371/journal.pone.0061320] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 03/07/2013] [Indexed: 11/26/2022] Open
Abstract
Background Endothelial dysfunction precedes atherosclerosis. Vasodilation induced by acetylcholine (ACh) is a specific test of endothelial function. Reproducibility of laser techniques such as laser-Doppler-flowmetry (LDF) and Laser-speckle-contrast-imaging (LSCI) to detect ACh vasodilation is debated and results expressions lack standardization. We aimed to study at a 7-day interval (i) the inter-subject reproducibility, (ii) the intra-subjects reproducibility, and (iii) the effect of the results expressions over variability. Methods and Results Using LDF and LSCI simultaneously, we performed two different ACh-iontophoresis protocols. The maximal ACh vasodilation (peak-ACh) was expressed as absolute or normalized flow or conductance values. Inter-subject reproducibility was expressed as coefficient of variation (inter-CV,%). Intra-subject reproducibility was expressed as within subject coefficients of variation (intra-CV,%), and intra-class correlation coefficients (ICC). Fifteen healthy subjects were included. The inter-subject reproducibility of peak-ACh depended upon the expression of the results and ranged from 55% to 162% for LDF and from 17% to 83% for LSCI. The intra-subject reproducibility (intra-CV/ICC) of peak-ACh was reduced when assessed with LSCI compared to LDF no matter how the results were expressed and whatever the protocol used. The highest intra-subject reproducibility was found using LSCI. It was 18.7%/0.87 for a single current stimulation (expressed as cutaneous vascular conductance) and 11.4%/0.61 for multiple current stimulations (expressed as absolute value). Conclusion ACh-iontophoresis coupled with LSCI is a promising test to assess endothelial function because it is reproducible, safe, and non-invasive. N°: NCT01664572.
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Affiliation(s)
- Cyril Puissant
- Laboratory of Vascular Investigations, University Hospital, Angers, France
| | - Pierre Abraham
- Laboratory of Vascular Investigations, University Hospital, Angers, France
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
| | - Sylvain Durand
- EA 4334 Motricity, Interactions, and Performance, LUNAM University, University du Maine, Le Mans, France
| | - Anne Humeau-Heurtier
- LISA – Laboratoire d'Ingénierie des Systèmes Automatisés, LUNAM University, University of Angers, Angers, France
| | - Sébastien Faure
- INSERM U1063, Stress oxydant et pathologies métaboliques (SOPAM), LUNAM University, University of Angers, Angers, France
| | - Georges Lefthériotis
- Laboratory of Vascular Investigations, University Hospital, Angers, France
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
| | - Pascal Rousseau
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
- Department of Plastic Surgery, University Hospital, Angers, France
| | - Guillaume Mahé
- Laboratory of Vascular Investigations, University Hospital, Angers, France
- Biologie Neurovasculaire et Mitochondriale Intégrée (BNMI) - Unité mixte UMR CNRS 6214/INSERM U 1083, LUNAM University, Medicine Faculty, Angers, France
- * E-mail:
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Humeau-Heurtier A, Guerreschi E, Abraham P, Mahe G. Relevance of Laser Doppler and Laser Speckle Techniques for Assessing Vascular Function: State of the Art and Future Trends. IEEE Trans Biomed Eng 2013; 60:659-66. [DOI: 10.1109/tbme.2013.2243449] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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