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Daidone M, Casuccio A, Puleo MG, Del Cuore A, Pacinella G, Di Chiara T, Di Raimondo D, Immordino P, Tuttolomondo A. Mediterranean diet effects on vascular health and serum levels of adipokines and ceramides. PLoS One 2024; 19:e0300844. [PMID: 38809909 PMCID: PMC11135776 DOI: 10.1371/journal.pone.0300844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 03/04/2024] [Indexed: 05/31/2024] Open
Abstract
BACKGROUND A randomized clinical trial to evaluate the effect of a Mediterranean-style diet on vascular health indices such as endothelial function indices, serum lipid and ceramide plasma and some adipokine serum levels. We recruited all consecutive patients at high risk of cardiovascular diseases admitted to the Internal Medicine and Stroke Care ward at the University Hospital of Palermo between September 2017 and December 2020. MATERIALS AND METHODS The enrolled subjects, after the evaluation of the degree of adherence to a dietary regimen of the Mediterranean-style diet, were randomised to a Mediterranean Diet (group A) assessing the adherence to a Mediterranean-style diet at each follow up visit (every three months) for the entire duration of the study (twelve months) and to a Low-fat diet (group B) with a dietary "counselling" starting every three months for the entire duration of the study (twelve months).The aims of the study were to evaluate: the effects of adherence to Mediterranean Diet on some surrogate markers of vascular damage, such as endothelial function measured by means of the reactive hyperaemia index (RHI) and augmentation index (AIX), at the 6-(T1) and 12-month (T2) follow-ups; the effects of adherence to Mediterranean Diet on the lipidaemic profile and on serum levels of ceramides at T1 and T2 follow-ups; the effects of adherence to Mediterranean Diet on serum levels of visfatin, adiponectin and resistin at the 6- and 12-month follow-ups. RESULTS A total of 101 patients were randomised to a Mediterranean Diet style and 52 control subjects were randomised to a low-fat diet with a dietary "counselling". At the six-month follow-up (T1), subjects in the Mediterranean Diet group showed significantly lower mean serum total cholesterol levels, and significantly higher increase in reactive hyperaemia index (RHI) values compared to the low-fat diet group. Patients in the Mediterranean Diet group also showed lower serum levels of resistin and visfatin at the six-month follow-up compared to the control group, as well as higher values of adiponectin, lower values of C24:0, higher values of C22:0 and higher values of the C24:0/C16:0 ratio. At the twelve-month follow-up (T2), subjects in the Mediterranean Diet group showed lower serum total cholesterol levels and lower serum LDL cholesterol levels than those in the control group. At the twelve-month follow-up, we also observed a further significant increase in the mean RHI in the Mediterranean Diet group, lower serum levels of resistin and visfatin, lower values of C24:0 and of C:18:0,and higher values of the C24:0/C16:0 ratio. DISCUSSION The findings of our current study offer a further possible explanation with regard to the beneficial effects of a higher degree of adherence to a Mediterranean-style diet on multiple cardiovascular risk factors and the underlying mechanisms of atherosclerosis. Moreover, these findings provide an additional plausible interpretation of the results from observational and cohort studies linking high adherence to a Mediterranean-style diet with lower total mortality and a decrease in cardiovascular events and cardiovascular mortality. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT04873167. https://classic.clinicaltrials.gov/ct2/show/NCT04873167.
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Affiliation(s)
- Mario Daidone
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Alessandra Casuccio
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Maria Grazia Puleo
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Alessandro Del Cuore
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Gaetano Pacinella
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Tiziana Di Chiara
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Domenico Di Raimondo
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
| | - Palmira Immordino
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
| | - Antonino Tuttolomondo
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza “G. D’Alessandro”, Palermo, Italy
- U.O. C di Medicina Interna con Stroke Care, Palermo, Italy
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Pinaffi-Langley ACDC, Dajani RM, Prater MC, Nguyen HVM, Vrancken K, Hays FA, Hord NG. Dietary Nitrate from Plant Foods: A Conditionally Essential Nutrient for Cardiovascular Health. Adv Nutr 2024; 15:100158. [PMID: 38008359 PMCID: PMC10776916 DOI: 10.1016/j.advnut.2023.100158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/14/2023] [Accepted: 11/21/2023] [Indexed: 11/28/2023] Open
Abstract
Under specific conditions, such as catabolic stress or systemic inflammation, endogenous nutrient production becomes insufficient and exogenous supplementation (for example, through dietary intake) is required. Herein, we propose consideration of a dietary nitrate from plant foods as a conditionally essential nutrient for cardiovascular health based on its role in nitric oxide homeostasis. Nitrate derived from plant foods may function as a conditionally essential nutrient, whereas nitrate obtained from other dietary sources, such as drinking water and cured/processed meats, warrants separate consideration because of the associated health risks. We have surveyed the literature and summarized epidemiological evidence regarding the effect of dietary nitrate on cardiovascular disease and risk factors. Meta-analyses and population-based observational studies have consistently demonstrated an inverse association of dietary nitrate with blood pressure and cardiovascular disease outcomes. Considering the available evidence, we suggest 2 different approaches to providing dietary guidance on nitrate from plant-based dietary sources as a nutrient: the Dietary Reference Intakes developed by the National Academies of Sciences, Engineering, and Medicine, and the dietary guidelines evaluated by the Academy of Nutrition and Dietetics. Ultimately, this proposal underscores the need for food-based dietary guidelines to capture the complex and context-dependent relationships between nutrients, particularly dietary nitrate, and health.
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Affiliation(s)
- Ana Clara da C Pinaffi-Langley
- Department of Nutritional Sciences, College of Allied Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Rosa M Dajani
- Nutrition and Food Services, San Francisco Health, University of California, San Francisco, CA, United States
| | - M Catherine Prater
- Department of Foods and Nutrition, Dawson Hall, University of Georgia, Athens, GA, United States
| | - Hoang Van M Nguyen
- Department of Nutritional Sciences, College of Allied Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | | | - Franklin A Hays
- Department of Nutritional Sciences, College of Allied Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Norman G Hord
- Department of Nutritional Sciences, College of Allied Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States; Department of Nutritional Sciences, College of Education and Human Sciences, Oklahoma State University, Stillwater, OK, United States.
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Chronic PCSK9 inhibitor therapy leads to sustained improvements in endothelial function, arterial stiffness, and microvascular function. Microvasc Res 2023; 148:104513. [PMID: 36870561 DOI: 10.1016/j.mvr.2023.104513] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 02/27/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023]
Abstract
BACKGROUND Proprotein convertase subtilisin/kexin type 9 inhibitors (PCSK9i) effectively decrease low-density lipoprotein cholesterol (LDL-C) and reduce cardiovascular events in patients at very high cardiovascular risk. Recent short-term studies suggest a partially LDL-C independent beneficial effect of PCSK9 inhibitor (PCSK9i) therapy on endothelial function and arterial stiffness, whereas it is unknown if this effect persists and what the effect is on microcirculation. OBJECTIVE To investigate the effects of PCSK9i therapy on vascular parameters beyond its lipid lowering effect. METHODS In this prospective trial, 32 patients at very high cardiovascular risk and indication for PCSK9i therapy were included. Measurements were performed at baseline and after 6 months of PCSK9i treatment. Endothelial function was assessed as flow-mediated dilation (FMD). Arterial stiffness was measured as pulse wave velocity (PWV) and aortic augmentation index (AIx). Peripheral tissue oxygenation (StO2) as a marker of microvascular function was assessed at the distal extremities using near-infrared spectroscopy camera. RESULTS Six months of PCSK9i therapy decreased LDL-C levels from 141 ± 54 to 60 ± 30 mg/dl (-56 ± 21 %, p < 0.001), FMD significantly increased from 5.4 ± 1.7 % to 6.4 ± 1.9 % (+19 ± 10 %, p < 0.001), PWV decreased in male patients significantly from 8.9 ± 2.1 to 7.9 ± 1.5 m/s (-12 ± 9 %, p = 0.025). AIx decreased from 27.1 ± 10.4 % to 23.0 ± 9.7 % (-16 ± 14 %, p < 0.001), StO2 significantly increased from 67 ± 12 % to 71 ± 11 % (+7 ± 6 %, p = 0.012). Brachial and aortic blood pressure showed no significant changes after six months. There was no correlation between LDL-C reduction and changes in vascular parameters. CONCLUSIONS Chronic PCSK9i therapy is associated with sustained improvements in endothelial function, arterial stiffness, and microvascular function independent from lipid lowering.
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The Potential of L-Arginine in Prevention and Treatment of Disturbed Carbohydrate and Lipid Metabolism—A Review. Nutrients 2022; 14:nu14050961. [PMID: 35267936 PMCID: PMC8912821 DOI: 10.3390/nu14050961] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 01/27/2023] Open
Abstract
L-arginine, an endogenous amino acid, is a safe substance that can be found in food. The compound is involved in synthesis of various products responsible for regulatory functions in the body. Particularly noteworthy is, among others, nitric oxide, a signaling molecule regulating carbohydrate and lipid metabolism. The increasing experimental and clinical data indicate that L-arginine supplementation may be helpful in managing disturbed metabolism in obesity, regulate arterial blood pressure or alleviate type 2 diabetes symptoms, but the mechanisms underlying these effects have not been sufficiently elucidated. This review aims to present the up-to-date information regarding the current uses and health-promoting potential of L-arginine, its effects on nitric oxide, carbohydrate and lipid metabolisms, based on the results of in vivo, in vitro studies, and clinical human trials. Available literature suggests that L-arginine may have beneficial effects on human health. However, some studies found that higher dietary L-arginine is associated with worsening of an existing disease or may be potential risk factor for development of some diseases. The mechanisms of regulatory effects of L-arginine on carbohydrate and lipid metabolism have not been fully understood and are currently under investigation.
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Zhao YX, Tong L, Zhang GM, Zhao XH, Sa YP, Liu Y, Lu DX, Ga Q, Wu P. L-Arginine Supplementation Improves Vascular Endothelial Dysfunction Induced by High-Fat Diet in Rats Exposed to Hypoxia. Wilderness Environ Med 2020; 31:400-406. [PMID: 33132032 DOI: 10.1016/j.wem.2020.06.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 06/01/2020] [Accepted: 06/17/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Our previous study showed that high-fat diet inhibited the increase in nitric oxide and endothelial nitric oxide synthase expression in the aortic endothelium of rats exposed to hypoxia, and hypoxia plus a high-fat diet led to earlier and more severe vascular endothelial dysfunction (VED) than hypoxia alone. The purpose of the present study was to investigate the effects of L-arginine on high-fat diet-induced VED of rats in hypoxia. METHODS Forty male Sprague-Dawley rats were randomly divided into 4 groups and treated with hypoxia (H group), hypoxia plus high-fat diet (H+HFD group), hypoxia plus L-arginine (H+L-Arg group), and hypoxia plus high-fat diet and L-arginine (H+HFD+L-Arg group) for 1 wk. Hypoxia was simulated in a hypobaric chamber with an altitude of 5000 m. Aortic morphology and endothelium-dependent vasorelaxation were used to assess VED. RESULTS High-fat diet impaired vascular remodeling and reduced endothelium-dependent vasodilator response to acetylcholine in rats exposed to hypoxia, secondary to dysregulation of the nitric oxide pathway. L-arginine supplementation significantly increased plasma nitrates and nitrites and endothelial nitric oxide synthase mRNA levels and improved ultrastructural changes in aortic endothelium and endothelium-dependent vasodilator response. CONCLUSIONS L-arginine prevents aortic ultrastructural changes and reverses VED induced by high-fat diet in rats exposed to hypoxia, which may have implications for VED induced by high-fat diet in high altitude dwellers.
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Affiliation(s)
- Yan-Xia Zhao
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Li Tong
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Guang-Mei Zhang
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Xie-Hui Zhao
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Yu-Ping Sa
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Yan Liu
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Dian-Xiang Lu
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China
| | - Qin Ga
- Research Center for High Altitude Medical Sciences, Qinghai University Medical College, Qinghai, China
| | - Ping Wu
- Department of Traditional Chinese Medicine, Qinghai University Medical College, Qinghai, China.
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Craig A, Mels CMC, Schutte AE, Tsikas D, Kruger R. Nitric oxide-related markers link inversely to blood pressure in black boys and men: the ASOS and African-PREDICT studies. Amino Acids 2020; 52:639-648. [PMID: 32303905 DOI: 10.1007/s00726-020-02842-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/09/2020] [Indexed: 12/16/2022]
Abstract
Nitric oxide plays an important role in maintaining endothelial function, while increased oxidative stress may lead to nitric oxide inactivation and cardiovascular disease. If nitric oxide biosynthesis/bioavailability is already suppressed early in life, it may potentially predispose an individual to the early development of cardiovascular disease. We therefore aimed to identify differences in nitric oxide-related markers (urinary nitrate, nitrite and the nitrate-to-nitrite ratio (UNOxR)) between young black and white individuals, and whether these markers are associated with blood pressure and carotid intima media thickness. We included black and white healthy boys (n = 80; aged 6-8 years) and men (n = 510; 20-30 years) and measured blood pressure and carotid intima media thickness, along with urinary biochemical markers including nitrate and nitrite. The black boys and men had lower nitrate and UNOxR (all p ≤ 0.003) than their white counterparts. In single and multiple regression analyses, we found an inverse association of diastolic blood pressure in the black boys (adj. R2 = 0.27; β = -0.32; p = 0.030), and systolic blood pressure in black men (adj. R2 = 0.07; β = -0.13; p = 0.036) with nitrate. Carotid intima media thickness associated inversely with UNOxR in the black men (adj. R2 = 0.02; β = -0.14; p = 0.023), but not in the boys. Lower urinary nitrate in black boys and young men was associated negatively with blood pressure, suggesting that potentially lower nitric oxide bioavailability in young black individuals may contribute to hypertension development in later life.
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Affiliation(s)
- Ashleigh Craig
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa
| | - Catharina M C Mels
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.,MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa
| | - Aletta E Schutte
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.,MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa.,Faculty of Medicine, University of New South Wales, The George Institute for Global Health, Sydney, Australia
| | - Dimitrios Tsikas
- Institute of Toxicology, Core Unit Proteomics, Hannover Medical School, Hannover, Germany
| | - Ruan Kruger
- Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa. .,MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa.
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Louwies T, Int Panis L, Alders T, Bonné K, Goswami N, Nawrot TS, Dendale P, De Boever P. Microvascular reactivity in rehabilitating cardiac patients based on measurements of retinal blood vessel diameters. Microvasc Res 2019; 124:25-29. [PMID: 30807772 DOI: 10.1016/j.mvr.2019.02.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/16/2019] [Accepted: 02/22/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Exercise-based rehabilitation improves general cardiovascular fitness. The impact on the microvascular system has been studied in less detail. We measured changes in retinal blood vessel diameters, as a proxy for microvascular reactivity, in cardiac patients and we assessed the impact of a rehabilitation program on retinal vessel diameters. DESIGN Cardiac patients (n = 78) and age-matched healthy controls (n = 32) performed an initial maximal endurance cycling test. Patients then participated in a 12-week rehabilitation program with additional endurance tests being performed six and twelve weeks after the initial test. METHODS Fundus images were collected immediately before and 0, 5, 10, 15 and 30 min after the endurance test. Widths of retinal blood vessels, represented as Central Retinal Arteriolar/Venular Equivalent (CRAE/CRVE) were calculated from the images. RESULTS At the start of the rehabilitation program, CRAE and CRVE values of the patients changed immediately after the endurance test with respectively -1.90 μm (95% CI: -3.58; -0.22) and -5.32 μm (95% CI: -7.33; -3.30) compared to baseline values. In contrast, CRAE and CRVE values of healthy controls were respectively increased [3.52 μm (95% CI: 2.34; 4.69)] and decreased [-3.17 μm (95% CI: -5.27; -1.07)]. After six and twelve weeks, CRAE responses of patients immediately after endurance test increased respectively with 5.98 μm (95% CI: 4.25; 7.71) and 4.44 μm (95% CI: 3.18; 5.71). These responses were similar to the microvascular reactions observed in the control group. CONCLUSIONS Arteriolar and venular retinal microvascular responses in cardiac patients were different from the ones of healthy controls. Retinal microvascular response of cardiac patients improved during rehabilitation.
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Affiliation(s)
- Tijs Louwies
- Health Unit, Flemish Institute for Technological Research (VITO), Mol, Belgium; Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Luc Int Panis
- Health Unit, Flemish Institute for Technological Research (VITO), Mol, Belgium; Transportation Research Institute, Hasselt University, Hasselt, Belgium
| | - Toon Alders
- Revalidatie- en gezondheidscentrum, Jessa Hospital, Hasselt, Belgium
| | - Kim Bonné
- Revalidatie- en gezondheidscentrum, Jessa Hospital, Hasselt, Belgium
| | - Nandu Goswami
- Otto Loewi Research Center of Vascular Biology, Immunity and Inflammation, Medical University Graz, Graz, Austria
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium; Department of Public Health & Primary Care, Leuven University, Leuven, Belgium
| | - Paul Dendale
- Revalidatie- en gezondheidscentrum, Jessa Hospital, Hasselt, Belgium; Faculty of Medicine and Life Sciences Hasselt University, Hasselt, Belgium
| | - Patrick De Boever
- Health Unit, Flemish Institute for Technological Research (VITO), Mol, Belgium; Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.
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Ward MH, Jones RR, Brender JD, de Kok TM, Weyer PJ, Nolan BT, Villanueva CM, van Breda SG. Drinking Water Nitrate and Human Health: An Updated Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E1557. [PMID: 30041450 PMCID: PMC6068531 DOI: 10.3390/ijerph15071557] [Citation(s) in RCA: 389] [Impact Index Per Article: 64.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 07/10/2018] [Accepted: 07/14/2018] [Indexed: 02/07/2023]
Abstract
Nitrate levels in our water resources have increased in many areas of the world largely due to applications of inorganic fertilizer and animal manure in agricultural areas. The regulatory limit for nitrate in public drinking water supplies was set to protect against infant methemoglobinemia, but other health effects were not considered. Risk of specific cancers and birth defects may be increased when nitrate is ingested under conditions that increase formation of N-nitroso compounds. We previously reviewed epidemiologic studies before 2005 of nitrate intake from drinking water and cancer, adverse reproductive outcomes and other health effects. Since that review, more than 30 epidemiologic studies have evaluated drinking water nitrate and these outcomes. The most common endpoints studied were colorectal cancer, bladder, and breast cancer (three studies each), and thyroid disease (four studies). Considering all studies, the strongest evidence for a relationship between drinking water nitrate ingestion and adverse health outcomes (besides methemoglobinemia) is for colorectal cancer, thyroid disease, and neural tube defects. Many studies observed increased risk with ingestion of water nitrate levels that were below regulatory limits. Future studies of these and other health outcomes should include improved exposure assessment and accurate characterization of individual factors that affect endogenous nitrosation.
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Affiliation(s)
- Mary H Ward
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Dr. Room 6E138, Rockville, MD 20850, USA.
| | - Rena R Jones
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Dr. Room 6E138, Rockville, MD 20850, USA.
| | - Jean D Brender
- Department of Epidemiology and Biostatistics, Texas A&M University, School of Public Health, College Station, TX 77843, USA.
| | - Theo M de Kok
- Department of Toxicogenomics, GROW-school for Oncology and Developmental Biology, Maastricht University Medical Center, P.O Box 616, 6200 MD Maastricht, The Netherlands.
| | - Peter J Weyer
- The Center for Health Effects of Environmental Contamination, The University of Iowa, 455 Van Allen Hall, Iowa City, IA 52242, USA.
| | - Bernard T Nolan
- U.S. Geological Survey, Water Mission Area, National Water Quality Program, 12201 Sunrise Valley Drive, Reston, VA 20192, USA.
| | - Cristina M Villanueva
- ISGlobal, 08003 Barcelona, Spain.
- IMIM (Hospital del Mar Medical Research Institute), 08003 Barcelona, Spain.
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain.
- CIBER Epidemiología y Salud Pública (CIBERESP), 28029 Madrid, Spain.
| | - Simone G van Breda
- Department of Toxicogenomics, GROW-school for Oncology and Developmental Biology, Maastricht University Medical Center, P.O Box 616, 6200 MD Maastricht, The Netherlands.
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Shannon OM, Stephan BCM, Minihane AM, Mathers JC, Siervo M. Nitric Oxide Boosting Effects of the Mediterranean Diet: A Potential Mechanism of Action. J Gerontol A Biol Sci Med Sci 2018; 73:902-904. [DOI: 10.1093/gerona/gly087] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 04/16/2018] [Indexed: 02/05/2023] Open
Affiliation(s)
- Oliver M Shannon
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, UK
| | - Blossom C M Stephan
- Institute of Health and Society, Newcastle University, UK
- Institute of Ageing, Newcastle University, UK
| | - Anne-Marie Minihane
- Department of Nutrition and Preventive Medicine, Norwich Medical School, University of East Anglia (UEA), UK
| | - John C Mathers
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, UK
| | - Mario Siervo
- Human Nutrition Research Centre, Institute of Cellular Medicine, Newcastle University, UK
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Maas R, Xanthakis V, Göen T, Müller J, Schwedhelm E, Böger RH, Vasan RS. Plasma Nitrate and Incidence of Cardiovascular Disease and All-Cause Mortality in the Community: The Framingham Offspring Study. J Am Heart Assoc 2017; 6:e006224. [PMID: 29151027 PMCID: PMC5721741 DOI: 10.1161/jaha.117.006224] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 09/25/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Nitrate is a dietary component as well as an endogenously formed metabolite and source of the signaling molecule nitric oxide. Harmful as well as beneficial effects of nitrate have been advocated. Data regarding the prognostic relevance of plasma nitrate are limited. The aim of this study was to evaluate the prospective association of plasma nitrate with cardiovascular disease (CVD) and all-cause mortality. METHODS AND RESULTS We assayed plasma nitrate in 2855 Framingham Offspring Study participants (mean age 59 years, 54% women) by gas chromatography-mass spectrometry and evaluated its association with all-cause mortality and incident CVD. On follow-up (median 17.3 years), 775 participants died and 522 developed new-onset CVD (of 2546 participants free of CVD at baseline). In multivariable models adjusting for standard risk factors, plasma nitrate was associated with an increased risk of death in participants (hazard ratio per unit increase in log-nitrate 1.21; 95% confidence interval, 1.04-1.40 [P=0.015]). The strength of the association was attenuated by additional adjustment for estimated glomerular filtration rate (hazard ratio, 1.16; 95% confidence interval, 1.00-1.35 [P=0.057]). In contrast, no evidence was found for an association of plasma nitrate with incident CVD (multivariable-adjusted hazard ratio per unit increase log-nitrate 1.08; 95% confidence interval, 0.89-1.31 [P=0.42]). CONCLUSIONS In our prospective community-based investigation, a higher plasma nitrate concentration was associated with all-cause mortality but not with incident CVD. The association of nitrate with mortality may at least in part be attributable to its association with renal function.
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Affiliation(s)
- Renke Maas
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Vanessa Xanthakis
- Department of Biostatistics, Boston University Schools of Public Health and Medicine, Boston, MA
- Framingham Heart Study National Heart, Lung, and Blood Institute, Framingham, MA
| | - Thomas Göen
- Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Johannes Müller
- Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Edzard Schwedhelm
- Institute of Clinical Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rainer H Böger
- Institute of Clinical Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ramachandran S Vasan
- Cardiology Division and Section of Preventive Medicine and Epidemiology, Boston University Schools of Public Health and Medicine, Boston, MA
- Framingham Heart Study National Heart, Lung, and Blood Institute, Framingham, MA
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11
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Moroni L, Selmi C, Angelini C, Meroni PL. Evaluation of Endothelial Function by Flow-Mediated Dilation: a Comprehensive Review in Rheumatic Disease. Arch Immunol Ther Exp (Warsz) 2017; 65:463-475. [DOI: 10.1007/s00005-017-0465-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/03/2017] [Indexed: 12/18/2022]
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12
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Deveaux A, Fouillet H, Petzke KJ, Hermier D, André E, Bunouf P, Lantoine-Adam F, Benamouzig R, Mathé V, Huneau JF, Mariotti F. A Slow- Compared with a Fast-Release Form of Oral Arginine Increases Its Utilization for Nitric Oxide Synthesis in Overweight Adults with Cardiometabolic Risk Factors in a Randomized Controlled Study. J Nutr 2016; 146:1322-9. [PMID: 27281799 DOI: 10.3945/jn.116.231910] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/05/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Oral l-arginine supplements can have a beneficial effect on nitric oxide (NO)-related functions when subjects have cardiovascular disease risk factors. OBJECTIVE The study was designed to determine the utilization for NO synthesis of oral l-arginine as a function of the cardiometabolic risk and the speed of absorption by comparing immediate-release arginine (IR-Arg), as in supplements, and sustained-release arginine (SR-Arg), which mimics the slow release of dietary arginine. METHODS In a randomized, single-blind, 2-period crossover, controlled trial (1 wk of treatment, >2 wk of washout), using [(15)N-(15)N-(guanidino)]-arginine for the first morning dose, we compared the bioavailability (secondary outcome) and utilization for NO synthesis (primary outcome) of 1.5 g IR- and SR-Arg 3 times/d in 12 healthy overweight [body mass index (BMI; in kg/m(2)): 25-30] adults with the hypertriglyceridemic waist phenotype [HTW; plasma triglycerides (TGs): >150 mg/dL; waist circumference: >94 cm (men) or >80 cm (women)] and 15 healthy control adults (CON; BMI: 18.5-25; no elevated TGs and waist circumference). RESULTS Plasma oral arginine areas under the curve were lower after supplementation with SR-Arg than with IR-Arg (112 ± 52.3 and 142 ± 50.8 μmol ⋅ h/L; P < 0.01). The utilization of oral arginine for NO synthesis was 58% higher in HTW subjects than in CON subjects and higher with SR-Arg than with IR-Arg (P < 0.05 both), particularly in HTW subjects (group-by-treatment interaction, P < 0.05). In HTW subjects administered the SR form, utilization for NO synthesis was 32% higher than with the IR form and 87% higher than in CON subjects who were administered the SR form. CONCLUSION In overweight adults with the HTW phenotype, a slow- compared with a fast-release form of oral arginine markedly favors the utilization of arginine for NO synthesis. The utilization of low-dose, slow-release arginine for NO synthesis is higher in overweight adults with the HTW phenotype than in healthy controls, suggesting that the sensitivity of NO synthesis to the dietary arginine supply increases with cardiometabolic risk. The trial was registered at clinicaltrials.gov as NCT02352740.
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Affiliation(s)
- Ambre Deveaux
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Hélène Fouillet
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Klaus J Petzke
- German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany; and
| | - Dominique Hermier
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Etienne André
- Institut de Recherche Pierre Fabre, Boulogne-Billancourt, France
| | - Pierre Bunouf
- Institut de Recherche Pierre Fabre, Boulogne-Billancourt, France
| | | | - Robert Benamouzig
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Véronique Mathé
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - Jean-François Huneau
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France
| | - François Mariotti
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, Paris, France;
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13
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Nonaka-Hashida S, Sekine M, Ozeki Y, Fujii K, Akiyama K, Shimoda K, Tsunoda M, Katane M, Saitoh Y, Miyamoto T, Homma H. Plasma concentrations of three methylated arginines, endogenous nitric oxide synthase inhibitors, in schizophrenic patients undergoing antipsychotic drug treatment. Psychiatry Res 2016; 238:203-210. [PMID: 27086234 DOI: 10.1016/j.psychres.2016.02.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 01/13/2016] [Accepted: 02/15/2016] [Indexed: 01/16/2023]
Abstract
Plasma concentration of three methylated arginines, endogenous nitric oxide synthase inhibitors, is not studied in schizophrenic patients. The purpose of this study was to determine plasma concentrations of N(G)-monomethyl-L-arginine (l-NMMA), N(G),N(G)-dimethyl-L-arginine (ADMA), N(G),N(G')-dimethyl-L-arginine (SDMA), and l-arginine in 56 male and 45 female schizophrenic patients undergoing antipsychotic drug treatment versus those of 39 male and 24 female healthy controls. Plasma concentrations of methylated arginines and l-arginine were measured using newly developed high performance liquid chromatography with fluorescence detection which we previously reported. Methylated arginine levels were slightly but significantly higher in schizophrenic patients. L-Arginine levels and the l-arginine/(ADMA+l-NMMA) ratio were higher in schizophrenic patients than in healthy controls. It is considered that pharmacological treatment of schizophrenic patients may lower methylated arginine levels that are increased by the disease, and increase L-arginine levels, eliciting an improvement in nitric oxide (NO) bioavailability.
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Affiliation(s)
- Satoko Nonaka-Hashida
- Graduate School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan; Pfizer Worldwide Research & Development, Tokyo Laboratories, Tokyo, Japan
| | - Masae Sekine
- Graduate School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
| | - Yuji Ozeki
- Department of Psychiatry Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Kumiko Fujii
- Department of Psychiatry Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Kazufumi Akiyama
- Department of Biological Psychiatry and Neuroscience, Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Kazutaka Shimoda
- Department of Psychiatry Dokkyo Medical University School of Medicine, Tochigi, Japan
| | - Makoto Tsunoda
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan
| | - Masumi Katane
- Graduate School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
| | - Yasuaki Saitoh
- Graduate School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
| | - Tetsuya Miyamoto
- Graduate School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
| | - Hiroshi Homma
- Graduate School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan.
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14
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Goldstein BI, Carnethon MR, Matthews KA, McIntyre RS, Miller GE, Raghuveer G, Stoney CM, Wasiak H, McCrindle BW. Major Depressive Disorder and Bipolar Disorder Predispose Youth to Accelerated Atherosclerosis and Early Cardiovascular Disease: A Scientific Statement From the American Heart Association. Circulation 2015; 132:965-86. [PMID: 26260736 DOI: 10.1161/cir.0000000000000229] [Citation(s) in RCA: 328] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the 2011 "Expert Panel on Integrated Guidelines for Cardiovascular Health and Risk Reduction in Children and Adolescents," several medical conditions among youth were identified that predispose to accelerated atherosclerosis and early cardiovascular disease (CVD), and risk stratification and management strategies for youth with these conditions were elaborated. Major depressive disorder (MDD) and bipolar disorder (BD) among youth satisfy the criteria set for, and therefore merit inclusion among, Expert Panel tier II moderate-risk conditions. The combined prevalence of MDD and BD among adolescents in the United States is ≈10%, at least 10 times greater than the prevalence of the existing moderate-risk conditions combined. The high prevalence of MDD and BD underscores the importance of positioning these diseases alongside other pediatric diseases previously identified as moderate risk for CVD. The overall objective of this statement is to increase awareness and recognition of MDD and BD among youth as moderate-risk conditions for early CVD. To achieve this objective, the primary specific aims of this statement are to (1) summarize evidence that MDD and BD are tier II moderate-risk conditions associated with accelerated atherosclerosis and early CVD and (2) position MDD and BD as tier II moderate-risk conditions that require the application of risk stratification and management strategies in accordance with Expert Panel recommendations. In this scientific statement, there is an integration of the various factors that putatively underlie the association of MDD and BD with CVD, including pathophysiological mechanisms, traditional CVD risk factors, behavioral and environmental factors, and psychiatric medications.
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15
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High fat diet exacerbates vascular endothelial dysfunction in rats exposed to continuous hypobaric hypoxia. Biochem Biophys Res Commun 2015; 457:485-91. [PMID: 25603049 DOI: 10.1016/j.bbrc.2015.01.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/10/2015] [Indexed: 01/28/2023]
Abstract
Independently, a high fat diet and hypoxia are associated with vascular endothelial dysfunction (VED) and often occur concurrently in patients. Nevertheless, the effects of a high fat diet on vascular endothelial function combined with hypoxia, a situation occurring with increasing frequency in many parts of the world, remain largely unknown. We investigated the effects of a high fat diet on vascular endothelial function in rats exposed to continuous hypoxia for 4 weeks. Seventy two male Sprague-Dawley rats were randomly divided into 3 groups: a hypoxia group fed regular chow, a combined hypoxia and high fat diet (HFD) group, and for comparison, rats maintained in normoxia, regular chow conditions were set as baseline (BL) group. The experimental data of BL group were obtained at beginning of hypoxia given in the other groups. Continuous hypoxia was induced in a hypobaric chamber maintained at an altitude of 5000 m. Compared to hypoxic conditions alone, hypoxia plus a HFD prevented adaptive changes in plasma nitric oxide (NOx) levels and caused earlier and more severe changes in aortic endothelial structures. Functionally, hypoxia plus a HFD resulted in impaired endothelium-dependent vasorelaxation responses to acetylcholine and altered the bioavailability of the nitric oxide synthase (NOS) substrate L-Arginine. At the molecular level, hypoxia plus a HFD blunted increases in endothelial NOS (eNOS) mRNA and protein in aortic endothelial tissue. Taken together, our findings demonstrate that in the setting of hypoxia, a high fat diet leads to earlier and more severe VED than hypoxia alone. These data have important implications for populations residing at high-altitude, as dietary patterns shift towards increased fat intake.
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Nonaka S, Sekine M, Tsunoda M, Ozeki Y, Fujii K, Akiyama K, Shimoda K, Furuchi T, Katane M, Saitoh Y, Homma H. Simultaneous determination of N
G
-monomethyl-l
-arginine, N
G
,N
G
-dimethyl-l
-arginine, N
G
,N
G′
-dimethyl-l
-arginine, and l
-arginine using monolithic silica disk-packed spin columns and a monolithic silica column. J Sep Sci 2014; 37:2087-94. [DOI: 10.1002/jssc.201400240] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/26/2014] [Accepted: 05/26/2014] [Indexed: 12/11/2022]
Affiliation(s)
- Satoko Nonaka
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
- Pfizer Worldwide Research & Development; Tokyo Laboratories; Tokyo Japan
| | - Masae Sekine
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Makoto Tsunoda
- Graduate School of Pharmaceutical Sciences; University of Tokyo; Tokyo Japan
| | - Yuji Ozeki
- Department of Psychiatry; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Kumiko Fujii
- Department of Psychiatry; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Kazufumi Akiyama
- Department of Biological Psychiatry and Neuroscience; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Kazutaka Shimoda
- Department of Psychiatry; Dokkyo Medical University School of Medicine; Tochigi Japan
| | - Takemitsu Furuchi
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Masumi Katane
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Yasuaki Saitoh
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
| | - Hiroshi Homma
- Faculty of Pharmaceutical Life Sciences; Kitasato University; Tokyo Japan
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17
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Zhao Z, Pompey S, Dong H, Weng J, Garuti R, Michaely P. S-nitrosylation of ARH is required for LDL uptake by the LDL receptor. J Lipid Res 2013; 54:1550-1559. [PMID: 23564733 DOI: 10.1194/jlr.m033167] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The LDL receptor (LDLR) relies upon endocytic adaptor proteins for internalization of lipoproteins. The results of this study show that the LDLR adaptor autosomal recessive hypercholesterolemia protein (ARH) requires nitric oxide to support LDL uptake. Nitric oxide nitrosylates ARH at C199 and C286, and these posttranslational modifications are necessary for association of ARH with the adaptor protein 2 (AP-2) component of clathrin-coated pits. In the absence of nitrosylation, ARH is unable to target LDL-LDLR complexes to coated pits, resulting in poor LDL uptake. The role of nitric oxide on LDLR function is specific for ARH because inhibition of nitric oxide synthase activity impairs ARH-supported LDL uptake but has no effect on other LDLR-dependent lipoprotein uptake processes, including VLDL remnant uptake and dab2-supported LDL uptake. These findings suggest that cells that depend upon ARH for LDL uptake can control which lipoproteins are internalized by their LDLRs through changes in nitric oxide.
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Affiliation(s)
- Zhenze Zhao
- Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX
| | - Shanica Pompey
- Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX
| | - Hongyun Dong
- Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX
| | - Jian Weng
- Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX
| | - Rita Garuti
- Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX
| | - Peter Michaely
- Department of Cell Biology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX.
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18
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Siervo M, Bluck LJC. In vivo nitric oxide synthesis, insulin sensitivity, and asymmetric dimethylarginine in obese subjects without and with metabolic syndrome. Metabolism 2012; 61:680-8. [PMID: 22146092 DOI: 10.1016/j.metabol.2011.10.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Revised: 09/23/2011] [Accepted: 10/08/2011] [Indexed: 10/14/2022]
Abstract
Metabolic syndrome (MetSyn) is associated with impaired endothelial function. Here the association between nitric oxide (NO) production and insulin sensitivity (Si) in obese subjects with and without MetSyn was evaluated. The relationship between NO production and asymmetric dimethylarginine (ADMA) was also explored. Seven healthy normal-weight subjects (male/female [M/F], 3/4; age, 27.4 ± 10.9 years; body mass index [BMI], 21.9 ± 2.2 kg/m(2)), 7 obese subjects without MetSyn (M/F, 1/6; age, 48.0 ± 8.0 years; BMI, 34.5 ± 2.3 kg/m(2)), and 7 with MetSyn (M/F, 3/4; age, 48.0 ± 10.7 years; BMI, 33.4 ± 2.9 kg/m(2)) were recruited. Body composition and cardiometabolic functions (blood pressure, glucose, insulin, triglycerides, total cholesterol, high-density lipoprotein, ADMA) were measured. A frequent sampling intravenous glucose tolerance test was performed to measure Si. A novel stable isotopic method was used to measure in vivo rates of NO production. The NO production was lower in obese subjects with MetSyn compared with normal-weight subjects and obese subjects without MetSyn. Similarly, Si was significantly lower in obesity, both without and with MetSyn, compared with the control group. A significant direct association was found between NO synthesis and Si (ρ = 0.47, P = .03). Circulating levels of ADMA were significantly higher in the obese group with MetSyn. A nonsignificant negative trend between ADMA and NO synthesis was observed. The association between Si and NO production suggests a close mechanistic link between endothelial function and insulin signaling. The results may be highly informative for the development of controlled longitudinal interventions to improve endothelial and metabolic regulation.
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Affiliation(s)
- Mario Siervo
- MRC Human Nutrition Research, Elsie Widdowson, Laboratory, Fulbourn Rd, Cambridge CB1 9NL, United Kingdom
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19
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Miri R, Saadati H, Ardi P, Firuzi O. Alterations in oxidative stress biomarkers associated with mild hyperlipidemia and smoking. Food Chem Toxicol 2012; 50:920-6. [DOI: 10.1016/j.fct.2011.12.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 11/30/2011] [Accepted: 12/20/2011] [Indexed: 11/25/2022]
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20
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The dual behavior of heat shock protein 70 and asymmetric dimethylarginine in relation to serum CRP levels in type 2 diabetes. Gene 2012; 498:107-11. [PMID: 22349026 DOI: 10.1016/j.gene.2012.01.085] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 01/30/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND Experimental evidence suggests that heat shock proteins (HSP) and asymmetric dimethylarginine (ADMA) are induced in the state of chronic inflammation and stress conditions. They are both inhibitors of nitric oxide synthase (NOS). The aim of this study was to evaluate the correlation between ADMA and HSP70, in patients with type 2 diabetes with respect to serum levels of C reactive protein (CRP). METHODS We quantified serum HSP70, ADMA and CRP in 80 newly-diagnosed patients with type 2 diabetes plus 80 age-, sex and BMI-matched healthy controls. The patients and controls were also stratified into groups of high and low CRP levels (cut-point: 2.5mg/ml). RESULTS Patients with type 2 diabetes had significantly higher serum HSP70 (0.52 [0.51-0.66] vs. 0.27 [0.26-0.36], p<0.001), ADMA (0.86 [0.81-0.92] vs. 0.72 [0.71-0.85], p<0.05) and CRP (2.9 [1.7-3.4] vs. 1.6[1.2-2.3], p<0.05) compared with healthy controls. Serum HSP70 and ADMA levels were significantly correlated in patients with high CRP levels (r=0.89, p<0.01), whereas there were no correlation in patients with low CRP (r=-0.37, p=0.07) and controls. This correlation was significant (r=0.77, p<0.001) in patients with high CRP and also in patients with low CRP levels (r=-0.51, p<0.05), after multiple adjustments for LDL and HDL levels. DISCUSSION We showed that, in a state of high inflammation; serum levels of ADMA parallel the HSP70 levels. However in low inflammation, they are negatively correlated. The duality in HSP70 and ADMA correlation may be related to the duality of NOS function in low and high CRP levels.
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21
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Lüneburg N, Xanthakis V, Schwedhelm E, Sullivan LM, Maas R, Anderssohn M, Riederer U, Glazer NL, Vasan RS, Böger RH. Reference intervals for plasma L-arginine and the L-arginine:asymmetric dimethylarginine ratio in the Framingham Offspring Cohort. J Nutr 2011; 141:2186-90. [PMID: 22031661 PMCID: PMC3223876 DOI: 10.3945/jn.111.148197] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
L-arginine, as a precursor of NO synthesis, has attracted much scientific attention in recent years. Experimental mouse models suggest that L-arginine supplementation can retard, halt, or even reverse atherogenesis. In human studies, supplementation with L-arginine improved endothelium-dependent vasodilation. However, L-arginine levels are best interpreted in the context of levels of asymmetric dimethylarginine (ADMA), a competitive inhibitor of NO synthase. Thus, reference limits for circulating L-arginine and the L-arginine:ADMA ratio may help to determine the nutritional state of individuals at high cardiovascular risk in light of increased ADMA levels. We defined reference limits for plasma L-arginine in 1141 people and for the L-arginine:ADMA ratio in 1138 relatively healthy individuals from the Framingham Offspring Cohort. Plasma L-arginine and ADMA concentrations were determined by using a stable isotope-based LC-MS/MS method. The reference limits (2.5th and 97.5th percentiles) for plasma L-arginine were 41.0 μmol/L (95% CI = 39.5-42.5 μmol/L) and 114 μmol/L (95% CI = 112-115 μmol/L), whereas corresponding reference limits (2.5th and 97.5th percentiles) for the L-arginine:ADMA ratio were 74.3 μmol/L (95% CI = 71.1-77.3 μmol/L) and 225 μmol/L (95% CI = 222-228 μmol/L). Plasma L-arginine was positively associated with the estimated glomerular filtration rate (eGFR) and blood glucose levels, whereas the L-arginine:ADMA ratio was positively associated with eGFR and diastolic blood pressure but inversely associated with homocysteine and (log)C-reactive protein. We report reference levels for plasma L-arginine and for the L-arginine:ADMA ratio that may be helpful for evaluation of the effects of L-arginine supplementation in participants with an impaired L-arginine/NO pathway.
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Affiliation(s)
- Nicole Lüneburg
- Institute of Clinical Pharmacology and Toxicology, University Medical Center, Hamburg-Eppendorf, Germany.
| | - Vanessa Xanthakis
- Department of Biostatistics, Boston University School of Public Health, Boston, MA,Framingham Heart Study, Boston University School of Medicine, Framingham, MA; and,Preventive Medicine and Cardiology Sections, and
| | - Edzard Schwedhelm
- Institute of Clinical Pharmacology and Toxicology, University Medical Center, Hamburg-Eppendorf, Germany
| | - Lisa M. Sullivan
- Department of Biostatistics, Boston University School of Public Health, Boston, MA
| | - Renke Maas
- Institute of Clinical Pharmacology and Toxicology, Friedrich-Alexander University, Erlangen, Germany
| | - Maike Anderssohn
- Institute of Clinical Pharmacology and Toxicology, University Medical Center, Hamburg-Eppendorf, Germany
| | - Ulrich Riederer
- Institute of Pharmacy, University of Hamburg, Hamburg, Germany
| | | | - Ramachandran S. Vasan
- Framingham Heart Study, Boston University School of Medicine, Framingham, MA; and,Department of Medicine, Boston University School of Medicine, Boston, MA
| | - Rainer H. Böger
- Institute of Clinical Pharmacology and Toxicology, University Medical Center, Hamburg-Eppendorf, Germany
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Sosnowski P, Krauss H, Bogdanski P, Suliburska J, Jablecka A, Cieslewicz A, Pupek-Musialik D, Jastak R. The influence of short-term L-arginine supplementation on rats' muscular and hepatic cells in ischemia-reperfusion syndrome. J Physiol Biochem 2011; 68:1-9. [PMID: 21948185 DOI: 10.1007/s13105-011-0111-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Accepted: 08/30/2011] [Indexed: 12/17/2022]
Abstract
Due to the complex mechanisms of L-arginine activity, it is difficult to determine the clinical significance of supplementation with this amino acid. The objective of this study was to determine the influence of short-term supplementation with L-arginine in stress conditions, induced by ischemia-reperfusion syndrome, by assessing the damage to muscular and hepatic cells on the basis of creatine kinase (CK), alanine aminotransferase (ALAT) and aspartic aminotransferase (AspAT) activity in blood and the level of oxygen free radicals in analyzed tissues of rats. We observed that induced ischemia of hind limb caused an increase in CK, ALAT and AspAT activity and an increase in the level of free radicals in liver, but not in skeletal muscle. Supplementation with L-arginine led to a reduction in serum activity of CK and AspAT and reduction of the level of free radicals in analysed tissues. Simultaneous supplementation with L -arginine AND L-NAME resulted in a reversal of changes induced by L-arginine supplementation in the case of AspAT and free radicals in skeletal muscle. The results indicate that under conditions of ischemia-reperfusion, short-term administration of L-arginine has a protective effect on skeletal muscle manifesting itself by reduction of CK in the serum and reduction of free radicals level in THIS tissue.
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Affiliation(s)
- Przemysław Sosnowski
- Department of Physiology, Poznan University of Medical Sciences, Swiecickiego 6 Str., 60-781 Poznan, Poland
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Siervo M, Stephan BCM, Feelisch M, Bluck LJC. Measurement of in vivo nitric oxide synthesis in humans using stable isotopic methods: a systematic review. Free Radic Biol Med 2011; 51:795-804. [PMID: 21672626 DOI: 10.1016/j.freeradbiomed.2011.05.032] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2011] [Revised: 04/22/2011] [Accepted: 05/25/2011] [Indexed: 11/16/2022]
Abstract
Stable isotopic methods are considered the "gold standard" for the measurement of rates of in vivo NO production. However, values reported for healthy human individuals differ by more than 1 order of magnitude. The reason for the apparent variability in NO production is unclear. The primary aim of this review was to evaluate and compare the rates of in vivo NO production in health and disease using stable isotope methods. Articles were retrieved using the PubMed electronic database. Information on concentrations, isotopic enrichments of fluxes, and conversion rates of molecules involved in the NO metabolic pathway was extracted from selected articles; 35 articles were included in the final analysis. Three protocols were identified, including the arginine-citrulline, the arginine-nitrate, and the oxygen-nitrate protocols. The arginine-citrulline protocol showed a wider variability compared to the arginine-nitrate and oxygen-nitrate protocols. The direction of the association between disease state and rate of NO production was essentially determined by the etiopathogenesis of the disorder (inflammatory, metabolic, vascular). Considerable variation in methodologies used to assess whole-body NO synthesis in humans exists. The precision of several aspects of the techniques and the validity of some assumptions made remain unknown, and there is a paucity of information about physiological rates of NO production from childhood over adolescence to old age.
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Affiliation(s)
- M Siervo
- Elsie Widdowson Laboratory, MRC Human Nutrition Research, Cambridge CB1 9NL, UK.
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25
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Direct association between dietary cholesterol intake and blood pressure: too good to be 'entirely' true. J Hypertens 2011; 29:194-7. [PMID: 21191277 DOI: 10.1097/hjh.0b013e3283424d3b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Alexandru N, Popov D, Dragan E, Andrei E, Georgescu A. Platelet activation in hypertension associated with hypercholesterolemia: effects of irbesartan. J Thromb Haemost 2011; 9:173-84. [PMID: 20961397 DOI: 10.1111/j.1538-7836.2010.04122.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
AIM The aim of this study was to determine the effect of simultaneous hypertension and hypercholesterolemia on platelet activation, nitric oxide (NO) production and oxidative stress, and to evaluate the role of irbesartan, an angiotensin II type 1 receptor antagonist. METHODS Golden Syrian hamsters were divided into three groups: controls, C (fed a standard diet); hypertensive-hypercholesterolemic, HH (fed a diet enriched in 3% cholesterol, 15% butter and 8% NaCl, for 4 months); and hypertensive-hypercholesterolemic treated with irbesartan, HHI (fed as HH group, plus irbesartan 10 mg kg(-1) per day, for 4 months). RESULTS Compared with the C group, platelets isolated from the HH group showed: morphological modifications; increased integrin β3 exposure and protein expression of P-selectin, FAK, PI3K, Akt and Src; reduced eNOS protein expression and NO production; higher generation of ROS, mostly produced by NADPH-oxidase, cyclooxygenase-1 (COX-1) and 12-lipoxygenase; and enhanced NAD(P)H oxidase activity and protein expression of gp91phox and p22phox subunits, 12-lipoxygenase, COX-1, cPLA(2) and PKC. Compared with the HH group, the treatment with irbesartan (HHI group) significantly attenuates the changes in all the molecules tested, reduces platelet aggregation, and improves intraplatelet redox balance. CONCLUSIONS Experimental hypertension associated with hypercholesterolemia produces major changes in morphology, signaling mechanisms and oxidative stress in blood platelets. These changes were significantly diminished by irbesartan administration, which functions as an antioxidant on platelets.
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Affiliation(s)
- N Alexandru
- Petru Poni Institute of Macromolecular Chemistry, Iasi Institute of Cellular Biology and Pathology- Nicolae Simionescu, Bucharest, Romania.
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He SW, Huang HW, Tan SQ, Fu X, Su LL, Peng DX, Lin RJ, Wong KS. Influence of angiotensin-converting enzyme insertion/deletion polymorphism on nitric oxide production in hypertensives and hypercholesterolaemics. J Clin Pharm Ther 2010; 36:187-93. [DOI: 10.1111/j.1365-2710.2010.01176.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Auclair S, Chironi G, Milenkovic D, Hollman PCH, Renard CMGC, Mégnien JL, Gariepy J, Paul JL, Simon A, Scalbert A. The regular consumption of a polyphenol-rich apple does not influence endothelial function: a randomised double-blind trial in hypercholesterolemic adults. Eur J Clin Nutr 2010; 64:1158-65. [PMID: 20683465 DOI: 10.1038/ejcn.2010.135] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BACKGROUND/OBJECTIVES Epidemiological studies suggest that apple consumption is associated with a reduction in cardiovascular disease risk. Apple polyphenols may contribute to explain these effects. Endothelial dysfunction has been associated with early stage of atherosclerosis and polyphenols from various dietary sources have been shown to reverse it. The aim of the present study was to investigate the effect of the consumption of a polyphenol-rich apple on endothelial function. SUBJECTS/METHODS In all, 30 hypercholesterolemic volunteers were included in a double-blind, randomized crossover trial. They successively consumed 40 g of two lyophilized apples, polyphenol-rich and polyphenol-poor, providing respectively 1.43 and 0.21 g polyphenols per day during two 4-week periods separated by a 4-week washout period. RESULTS Brachial artery flow-mediated vasodilation (FMD) was assessed at the beginning and at the end of each intervention period. FMD did not differ between the polyphenol-rich and the polyphenol-poor apples, neither did the other cardiovascular disease risk factors (plasma lipids, homocysteine, antioxidant capacity). CONCLUSIONS These data suggest that over a 4-week period, the consumption of a polyphenol-rich apple does not improve vascular function in hypercholesterolemic patients.
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Affiliation(s)
- S Auclair
- Université d'Auvergne, Unité de Nutrition Humaine, Clermont Université, Clermont-Ferrand, France
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Abstract
Nitric oxide (NO) is a structurally simple, highly versatile molecule that was originally discovered over 30 years ago as an endothelium-derived relaxing factor. In addition to its vasorelaxing effects, NO is now recognized as a key determinant of vascular health, exerting antiplatelet, antithrombotic, and anti-inflammatory properties within the vasculature. This short-lived molecule exerts its inhibitory effect on vascular smooth muscle cells and platelets largely through cyclic guanosine monophosphate-dependent mechanisms, resulting in a multitude of molecular effects by which platelet activation and aggregation are prevented. The biosynthesis of NO occurs via the catalytic activity of NO synthase, an oxidoreductase found in many cell types. NO insufficiency can be attributed to limited substrate/cofactor availability as well as interactions with reactive oxygen species. Impaired NO bioavailability represents the central feature of endothelial dysfunction, a common abnormality found in many vascular diseases. In this review, we present an overview of NO synthesis and biochemistry, discuss the mechanisms of action of NO in regulating platelet and endothelial function, and review the effects of vascular disease states on NO bioavailability.
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Affiliation(s)
- Richard C Jin
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
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30
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Blackwell S. The biochemistry, measurement and current clinical significance of asymmetric dimethylarginine. Ann Clin Biochem 2009; 47:17-28. [PMID: 19940201 DOI: 10.1258/acb.2009.009196] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Asymmetric dimethylarginine (ADMA) is an endogenous competitive inhibitor of nitric oxide synthase and an important cause of endothelial dysfunction. Its increased plasma concentration is associated with a variety of traditional cardiovascular risk factors, and may mediate their effects on the vascular endothelium. ADMA is also an independent predictor of cardiovascular events and mortality, and predicts outcomes in critically ill patients in the intensive care unit. This work has provided insights into the role of ADMA as an endogenous regulator of nitric oxide synthesis. At present there is no specific therapy to modify ADMA concentration, but increasing interest and work on protein arginine methyltransferases and dimethylarginine dimethylaminohydrolase, which synthesize and metabolize ADMA, respectively, might provide novel therapeutic targets.
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Affiliation(s)
- Scott Blackwell
- Department of Clinical Biochemistry, Royal Infirmary, 84 Castle Street, Glasgow G4 0SF, UK.
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Magné J, Huneau JF, Delemasure S, Rochette L, Tomé D, Mariotti F. Whole-body basal nitric oxide production is impaired in postprandial endothelial dysfunction in healthy rats. Nitric Oxide 2009; 21:37-43. [PMID: 19416758 DOI: 10.1016/j.niox.2009.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 04/06/2009] [Accepted: 04/23/2009] [Indexed: 12/15/2022]
Abstract
In healthy humans, a high-saturated-fat/high-sucrose meal induces vascular endothelial dysfunction, a hallmark of atherogenesis. This transient dysfunction indicates a loss in nitric oxide (NO) production and/or bioactivity in the vasculature but it remains unknown if this is the local manifestation of a general impairment in NO pathway in the postprandial state. Here, we studied whole-body NO production and systemic NO bioactivity in postprandial endothelial dysfunction, as induced by a high-saturated-fat, high-sucrose meal. We first developed a physiological test of endothelial function on conscious rats, based on the transient fall in blood pressure after iv acetylcholine, and showed that this response was NO-dependent. As assessed with this method in healthy rats, endothelial function decreased during the postprandial state, being 60+/-7% lower than baseline at 6h after the meal challenge, associated with important elevations in plasma triglycerides and hydroperoxides. Aortic superoxide anion production, as assessed by oxidative fluorescent detection, was higher 6h after the meal challenge than after the nutrients vehicle (water). During the postprandial period, plasma cGMP, but not plasma ANP, markedly decreased, indicating a general decrease in NO bioavailability, which was numerically maximal 4h after the meal challenge. As determined 4h after ingestion by a tracer-based method using iv [(15)N(2)-(guanido)]-arginine, the whole-body NO production fell by 27+/-9% postprandially. This is the first study evidencing that a meal challenge that impairs the stimulated, NO-mediated, vascular response also reduces whole-body basal NO production and bioavailability. Postprandial pathophysiology may build on this general, fundamental alteration in NO production.
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Affiliation(s)
- Joëlle Magné
- AgroParisTech, CRNH-IdF, UMR914 Nutrition Physiology and Ingestive Behavior, F-75005 Paris, France
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BLAISE SOPHIE, MAAS RENKE, TROCME CANDICE, KOM GHAINSOMD, ROUSTIT MATTHIEU, CARPENTIER PATRICKH, CRACOWSKI JEANLUC. Correlation of Biomarkers of Endothelium Dysfunction and Matrix Remodeling in Patients with Systemic Sclerosis. J Rheumatol 2009; 36:984-8. [DOI: 10.3899/jrheum.080924] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Objective.Systemic sclerosis (SSc) is a multisystem disease characterized by microvascular dysfunction and excessive fibrosis. However, the relationship between these 2 features remains unclear. Endothelial dysfunction can be assessed by quantifying plasma asymmetric dimethylarginine (ADMA), an endogenous inhibitor of endothelial nitric oxide synthase. Matrix remodeling can be assessed by quantifying serum tissue inhibitor of matrix metalloproteinases-1 (TIMP-1). Both biomarkers are elevated in patients with SSc. Our objective was to test whether plasma ADMA is correlated with serum TIMP-1.Methods.We enrolled 91 subjects, 39 patients with SSc, 28 patients with primary Raynaud’s phenomenon (RP), and 24 healthy volunteers. Plasma ADMA concentrations were measured by liquid chromatography-tandem mass spectrometry. Serum TIMP-1 concentrations were determined by ELISA.Results.Mean ADMA concentrations were higher in patients with SSc (0.68 μM ± 0.12) than in patients with primary RP or healthy volunteers (respectively, 0.56 μM ± 0.14 and 0.62 μM ± 0.12; p = 0.002). Median serum TIMP-1 concentrations were increased in patients with SSc compared to primary RP and healthy volunteers [12 (9–15), 11 (8–13), and 10 (7–13) nM, respectively; p = 0.05]. In the SSc group, we observed a statistically significant correlation between plasma ADMA and serum TIMP-1 (r = 0.34, p = 0.035).Conclusion.These data are consistent with our hypothesis of an association of endothelial dysfunction and matrix remodeling in scleroderma spectrum disorders.
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Yang P, Li Y, Li JJ, Qin L, Li XY. Up-regulating PPAR-γ expression and NO concentration, and down-regulating PAI-1 concentration in a rabbit atherosclerotic model: the possible antiatherogenic and antithrombotic effects of atorvastatin. Int J Cardiol 2009; 139:213-7. [PMID: 19307033 DOI: 10.1016/j.ijcard.2008.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 08/24/2008] [Accepted: 10/12/2008] [Indexed: 11/19/2022]
Abstract
We investigated the effect of atorvastatin on the plasma concentration of plasminogen activator inhibitor-1 (PAI-1) and nitric oxide (NO) in a rabbit model, and the relationship between these effects and peroxisome proliferator-activated receptor γ (PPAR-γ). In our experiments, 24 male Japanese rabbits were divided into 3 groups: the high-cholesterol diet group (the high-C group), the high-cholesterol diet plus atorvastatin group (the atorvastatin group), and the normal diet group (the control group). All rabbits were killed after a 16-week feeding. The expression of PPAR-γ and the plasma concentrations of NO and PAI-1 were evaluated by an immunohistochemical assay while the level of the plasma lipid profile was measured using a commercially available kit. The atorvastatin not only reduces the plasma levels of the total cholesterol (TC) and the low-density lipoprotein cholesterol (LDL-C), but also increases the expression of PPAR-γ and the concentration of NO in comparison to the control group [16.11 ± 2.35% vs 7.68 ± 1.04%; 249.30 ± 27.90 vs 179.12 ± 28.51 (μml/L), p<0.05 respectively]. In addition, the concentration of PAI-1 in the atorvastatin group is lower than that in the control group (0.11 ± 0.01A vs 0.14 ± 0.02A, p<0.05). The changes of PAI-1 and NO in the atorvastatin group are in good accordance to that of PPAR-γ. Results show that atorvastatin significantly up-regulates the expression of nuclear transcription factor, namely PPAR-γ, and induces the changes of the other two factors, which might provide mechanisms for the antiatherosclerotic and antithrombotic effects of atorvastatin.
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Affiliation(s)
- Ping Yang
- Department of Cardiology, China-Japan Union Hospital of Jilin University, Changchun 130033, PR China
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Pirro M, Schillaci G, Romagno PF, Mannarino MR, Bagaglia F, Razzi R, Pasqualini L, Vaudo G, Mannarino E. Influence of short-term rosuvastatin therapy on endothelial progenitor cells and endothelial function. J Cardiovasc Pharmacol Ther 2009; 14:14-21. [PMID: 19158317 DOI: 10.1177/1074248408331021] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Endothelial progenitor cells maintain endothelium integrity by replacing injured endothelial cells. Cholesterol-lowering promotes either endothelial progenitor cells mobilization or improves endothelial function. It is unknown whether improving endothelial function with statin is associated with a parallel increased endothelial progenitor cells availability. Thirty-two hypercholesterolemic patients were assigned to 4-week rosuvastatin (10 mg daily) and 16 hypercholesterolemic served as controls. Circulating endothelial progenitor cells, brachial artery flow-mediated vasodilatation, an index of endothelial function, and the lipid profile were measured before and after the 4-week statin therapy. At baseline, we found a correlation between circulating endothelial progenitor cells and flow-mediated vasodilatation (r = .31, P = .029). At the end of the 4-week intervention with rosuvastatin there was a 37% reduction in low-density lipoprotein cholesterol (P < .001) and a significant 72% increase in the number of endothelial progenitor cells and flow-mediated vasodilatation (4.7 + 0.7% to 8.8 + 0.4%, P < .001). Endothelial progenitor cells and flow-mediated vasodilatation were unchanged at the end of the study in patients not taking statin. A correlation emerged between endothelial progenitor cells and flow-mediated vasodilatation variations (r = .52, P < .001), this correlation being still significant after controlling for blood cholesterol reduction. In conclusion, short-term rosuvastatin therapy contributes in hyperchoelsterolemic patients to improving endothelial function by lowering cholesterol and increasing the number of circulating endothelial progenitor cells; the latter effect appears to be partly independent from reduction in plasma cholesterol.
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Affiliation(s)
- Matteo Pirro
- Unit of Internal Medicine, Angiology and Arteriosclerosis Diseases, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy.
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Pirro M, Bagaglia F, Paoletti L, Razzi R, Mannarino MR. Review: Hypercholesterolemia-associated endothelial progenitor cell dysfunction. Ther Adv Cardiovasc Dis 2008; 2:329-39. [DOI: 10.1177/1753944708094769] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Hypercholesterolemia has been associated with increased cardiovascular risk by contributing to mechanical endothelial injury and dysfunction. There is evidence that chronic exposure to increased plasma cholesterol levels might also impair the repair of lipoprotein-mediated endothelial injury, possibly by reducing the availability and function of circulating endothelial progenitors. This review summarizes current knowledge about the mechanisms of lipoprotein-mediated endothelial injury and endothelial progenitor cell assisted vascular repair; the influence of hypercholesterolemia on endothelial progenitor cell dysfunction will be also addressed.
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Affiliation(s)
- Matteo Pirro
- Medicina Interna, Angiologia e Malattie da Arteriosclerosi, Università degli Studi di Perugia, Ospedale S. Maria della Misericordia, Piazzale Menghini, 06132 Perugia, Italy,
| | - Francesco Bagaglia
- Medicina Interna, Angiologia e Malattie da Arteriosclerosi, Università degli Studi di Perugia, Ospedale S. Maria della Misericordia, Piazzale Menghini, 06132 Perugia, Italy
| | - Lucio Paoletti
- Medicina Interna, Angiologia e Malattie da Arteriosclerosi, Università degli Studi di Perugia, Ospedale S. Maria della Misericordia, Piazzale Menghini, 06132 Perugia, Italy
| | - Rolando Razzi
- Medicina Interna, Angiologia e Malattie da Arteriosclerosi, Università degli Studi di Perugia, Ospedale S. Maria della Misericordia, Piazzale Menghini, 06132 Perugia, Italy
| | - Massimo R. Mannarino
- Medicina Interna, Angiologia e Malattie da Arteriosclerosi, Università degli Studi di Perugia, Ospedale S. Maria della Misericordia, Piazzale Menghini, 06132 Perugia, Italy
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Abstract
PURPOSE OF REVIEW The most accepted property of high-density lipoprotein is reverse cholesterol transport. However, other beneficial actions may contribute to the antiatherogenic role of high-density lipoprotein. This review addresses the action of high-density lipoprotein beyond reverse cholesterol transport. RECENT FINDINGS High-density lipoprotein cholesterol levels are inversely associated with coronary heart disease and other forms of vascular disease. Apart from transferring excess cholesterol to the liver, high-density lipoprotein exhibits favorable effects on oxidation, inflammation, thrombosis and endothelial function. Some of these actions are at least in part attributed to high-density lipoprotein-associated enzymes, such as paraoxonase and platelet-activating factor acetylhydrolase. However, high-density lipoprotein can become dysfunctional and proatherogenic under certain circumstances. SUMMARY Current data suggest that high-density lipoprotein possesses various properties beyond reverse cholesterol transport. However, many issues on the exact role of high-density lipoprotein remain unknown. Future research is needed.
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Doi Y, Yokoyama T, Sakai M, Nakamura Y, Tango T, Takahashi K. Spatial clusters of Creutzfeldt-Jakob disease mortality in Japan between 1995 and 2004. Neuroepidemiology 2008; 30:222-8. [PMID: 18424903 DOI: 10.1159/000126916] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2007] [Accepted: 02/12/2008] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND There is suggested to be a geographical difference in Creutzfeldt-Jakob disease (CJD) mortality in Japan. We performed a study to detect localized clusters and hot-spot areas of deaths from CJD in Japan during the 10-year period from 1995 to 2004. METHODS The diagnosis of CJD was taken from the death certificate (coded as A81.0 in the ICD-10). A total number of 1,168 CJD deaths (500 males and 668 females) were used for analysis using empirical Bayes estimates of standardized mortality ratios and the flexible spatial scan statistic to detect clusters. To detect the most likely cluster, p values were obtained using Monte Carlo hypothesis testing (with p < 0.05 as statistical significance). RESULTS The most likely cluster of CJD mortality was located in the northwest region from the base of Mt. Fuji, stretching over the two neighboring prefectures of Yamanashi and Shizuoka (relative risk = 2.28, p = 0.021). Some other clusters were detected but were not significant. CONCLUSIONS The present study supports the evidence of geographical clustering of deaths from CJD at a specific location in Japan.
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Affiliation(s)
- Y Doi
- Department of Education and Training Technology, National Institute of Public Health, Wako, Saitama, Japan.
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Valtonen P, Laitinen T, Lyyra-Laitinen T, Raitakari OT, Juonala M, Viikari JSA, Heiskanen N, Vanninen E, Punnonen K, Heinonen S. Serum L-Homoarginine Concentration is Elevated During Normal Pregnancy and is Related to Flow-Mediated Vasodilatation. Circ J 2008; 72:1879-84. [DOI: 10.1253/circj.cj-08-0240] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pirjo Valtonen
- Laboratory Centre, Department of Clinical Chemistry, Kuopio University Hospital and University of Kuopio
| | - Tomi Laitinen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Kuopio
| | - Tiina Lyyra-Laitinen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Kuopio
| | - Olli T. Raitakari
- Department of Clinical Physiology, Turku University Hospital and University of Turku
| | - Markus Juonala
- Department of Internal Medicine, Turku University Hospital and University of Turku
| | - Jorma SA Viikari
- Department of Internal Medicine, Turku University Hospital and University of Turku
| | - Nonna Heiskanen
- Department of Obstetrics and Gynaecology, Kuopio University Hospital and University of Kuopio
| | - Esko Vanninen
- Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital and University of Kuopio
| | - Kari Punnonen
- Laboratory Centre, Department of Clinical Chemistry, Kuopio University Hospital and University of Kuopio
| | - Seppo Heinonen
- Department of Obstetrics and Gynaecology, Kuopio University Hospital and University of Kuopio
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