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Bakker JR, Bondonno NP, Gaspari TA, Kemp-Harper BK, McCashney AJ, Hodgson JM, Croft KD, Ward NC. Low dose dietary nitrate improves endothelial dysfunction and plaque stability in the ApoE -/- mouse fed a high fat diet. Free Radic Biol Med 2016; 99:189-198. [PMID: 27519268 DOI: 10.1016/j.freeradbiomed.2016.08.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/03/2016] [Accepted: 08/08/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND Nitric oxide (NO) is an important vascular signalling molecule. NO is synthesised endogenously by endothelial nitric oxide synthase (eNOS). An alternate pathway is exogenous dietary nitrate, which can be converted to nitrite and then stored or further converted to NO and used immediately. Atherosclerosis is associated with endothelial dysfunction and subsequent lesion formation. This is thought to arise due to a reduction in the bioavailability and/or bioactivity of endogenous NO. AIM To determine if dietary nitrate can protect against endothelial dysfunction and lesion formation in the ApoE-/- mouse fed a high fat diet (HFD). METHODS AND RESULTS ApoE-/- fed a HFD were randomized to receive (i) high nitrate (10mmol/kg/day, n=12), (ii) moderate nitrate (1mmol/kg/day, n=8), (iii) low nitrate (0.1mmol/kg/day, n=8), or (iv) sodium chloride supplemented drinking water (control, n=10) for 10 weeks. A group of C57BL6 mice (n=6) received regular water and served as a healthy reference group. At 10 weeks, ACh-induced vessel relaxation was significantly impaired in ApoE-/- mice versus C57BL6. Mice supplemented with low or moderate nitrate showed significant improvements in ACh-induced vessel relaxation compared to ApoE-/- mice given the high nitrate or sodium chloride. Plaque collagen expression was increased and lipid deposition reduced following supplementation with low or moderate nitrate compared to sodium chloride, reflecting increased plaque stability with nitrate supplementation. Plasma nitrate and nitrite levels were significantly increased in all three groups fed the nitrate-supplemented water. CONCLUSION Low and moderate dose nitrate significantly improved endothelial function and atherosclerotic plaque composition in ApoE-/- mice fed a HFD.
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MESH Headings
- Acetylcholine/pharmacology
- Animals
- Aorta/drug effects
- Aorta/metabolism
- Aorta/pathology
- Apolipoproteins E/deficiency
- Apolipoproteins E/genetics
- Atherosclerosis/diet therapy
- Atherosclerosis/etiology
- Atherosclerosis/genetics
- Atherosclerosis/pathology
- Collagen/genetics
- Collagen/metabolism
- Diet, High-Fat/adverse effects
- Dietary Supplements
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Gene Expression
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Nitrates/administration & dosage
- Nitrates/blood
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/genetics
- Nitric Oxide Synthase Type III/metabolism
- Oxidative Stress
- Plaque, Atherosclerotic/diet therapy
- Plaque, Atherosclerotic/etiology
- Plaque, Atherosclerotic/genetics
- Plaque, Atherosclerotic/pathology
- Tissue Culture Techniques
- Vasodilation/drug effects
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Affiliation(s)
- J R Bakker
- School of Medicine & Pharmacology, University of Western Australia, Perth, Australia
| | - N P Bondonno
- School of Medicine & Pharmacology, University of Western Australia, Perth, Australia
| | - T A Gaspari
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, Australia
| | - B K Kemp-Harper
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, Australia
| | - A J McCashney
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, Australia
| | - J M Hodgson
- School of Medicine & Pharmacology, University of Western Australia, Perth, Australia; School of Medical and Health Sciences, Edith Cowan University, Perth, Australia
| | - K D Croft
- School of Medicine & Pharmacology, University of Western Australia, Perth, Australia
| | - N C Ward
- School of Medicine & Pharmacology, University of Western Australia, Perth, Australia; School of Biomedical Sciences & Curtin Health Innovation Research Institute, Curtin University, Perth, Australia.
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2
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Magaeva SV, Kubatiev AA, Shirokov EA, Simonenko VB. [REGRESSION OF ATHEROSCLECROTIC LESIONS: MEDICAMENTAL AND ALIMENTARY FACTORS]. Klin Med (Mosk) 2016; 94:668-671. [PMID: 30296041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The article reports results of clinical studies aimed to elucidate the influence of medicines on the size and density of atherosclerotic plaques in the walls of coronary and cerebral arteries. The phenomenon of regression of atherosclerotic lesions in the survivors of Leningrad siege during a long period of starvation is analyzed. The influence of inhibitors of angiotensin-converting enzyme on apoptosis of smooth muscle and foam cells of atherosclerotic plaques in the sanological mechanisms of atherosclerosis is discussed. The concept of natural regression of atherosclerosis is formulated and the necessity of development of the methods for is pharmacological activation are formulated.
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3
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Song G, Zong C, Zhang Z, Yu Y, Yao S, Jiao P, Tian H, Zhai L, Zhao H, Tian S, Zhang X, Wu Y, Sun X, Qin S. Molecular hydrogen stabilizes atherosclerotic plaque in low-density lipoprotein receptor-knockout mice. Free Radic Biol Med 2015; 87:58-68. [PMID: 26117323 DOI: 10.1016/j.freeradbiomed.2015.06.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 05/30/2015] [Accepted: 06/04/2015] [Indexed: 12/22/2022]
Abstract
Hydrogen (H(2)) attenuates the development of atherosclerosis in mouse models. We aimed to examine the effects of H(2) on atherosclerotic plaque stability. Low-density lipoprotein receptor-knockout (LDLR(-/-)) mice fed an atherogenic diet were dosed daily with H(2) and/or simvastatin. In vitro studies were carried out in an oxidized-LDL (ox-LDL)-stimulated macrophage-derived foam cell model treated with or without H(2). H(2) or simvastatin significantly enhanced plaque stability by increasing levels of collagen, as well as reducing macrophage and lipid levels in plaques. The decreased numbers of dendritic cells and increased numbers of regulatory T cells in plaques further supported the stabilizing effect of H(2) or simvastatin. Moreover, H(2) treatment decreased serum ox-LDL level and apoptosis in plaques with concomitant inhibition of endoplasmic reticulum stress (ERS) and reduction of reactive oxygen species (ROS) accumulation in the aorta. In vitro, like the ERS inhibitor 4-phenylbutyric acid, H(2) inhibited ox-LDL- or tunicamycin (an ERS inducer)-induced ERS response and cell apoptosis. In addition, like the ROS scavenger N-acetylcysteine, H(2) inhibited ox-LDL- or Cu(2+) (an ROS inducer)-induced reduction in cell viability and increase in cellular ROS. Also, H(2) increased Nrf2 (NF-E2-related factor-2, an important factor in antioxidant signaling) activation and Nrf2 small interfering RNA abolished the protective effect of H(2) on ox-LDL-induced cellular ROS production. The inhibitory effects of H(2) on the apoptosis of macrophage-derived foam cells, which take effect by suppressing the activation of the ERS pathway and by activating the Nrf2 antioxidant pathway, might lead to an improvement in atherosclerotic plaque stability.
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Affiliation(s)
- Guohua Song
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China; Heart Center of TaiShan Medical University, Tai'an 271000, China.
| | - Chuanlong Zong
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China; Heart Center of TaiShan Medical University, Tai'an 271000, China
| | - Zhaoqiang Zhang
- College of Basic Medical Sciences, TaiShan Medical University, Tai'an 271000, China
| | - Yang Yu
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China; Heart Center of TaiShan Medical University, Tai'an 271000, China
| | - Shutong Yao
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China; College of Basic Medical Sciences, TaiShan Medical University, Tai'an 271000, China
| | - Peng Jiao
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China
| | - Hua Tian
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China
| | - Lei Zhai
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China
| | - Hui Zhao
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China
| | - Shuyan Tian
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China
| | - Xiangjian Zhang
- Hebei Collaborative Innovation Center for Cardiocerebrovascular Disease and Hebei Key Laboratory of Vascular Homeostasis, Shijiazhuang 050000, China
| | - Yun Wu
- Heart Center of TaiShan Medical University, Tai'an 271000, China
| | - Xuejun Sun
- Department of Diving Medicine, Second Military Medical University, Shanghai, China
| | - Shucun Qin
- Key Laboratory of Atherosclerosis in Universities of Shandong and Institute of Atherosclerosis, TaiShan Medical University, Tai'an 271000, China; Heart Center of TaiShan Medical University, Tai'an 271000, China.
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4
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Casas R, Sacanella E, Urpí-Sardà M, Chiva-Blanch G, Ros E, Martínez-González MA, Covas MI, Salas-Salvadó J, Fiol M, Arós F, Estruch R. The effects of the mediterranean diet on biomarkers of vascular wall inflammation and plaque vulnerability in subjects with high risk for cardiovascular disease. A randomized trial. PLoS One 2014; 9:e100084. [PMID: 24925270 PMCID: PMC4055759 DOI: 10.1371/journal.pone.0100084] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 05/15/2014] [Indexed: 12/12/2022] Open
Abstract
Background Adherence to the Mediterranean diet (MD) is associated with reduced morbidity and mortality due to cardiovascular disease. However, how the MD exerts its effects is not fully known. Aim To assess the 12-month effects of two enhanced MDs compared to a low-fat diet on inflammatory biomarkers related to atherosclerosis and plaque vulnerability in a subcohort of the PREDIMED (Prevención con Dieta Mediterránea) study. Methods A total of 164 participants at high risk for cardiovascular disease were randomized into three diet groups: MD supplemented with 50mL/d of extra virgin olive oil (MD+EVOO) or 30 g/d of nuts (MD+Nuts) and a low-fat diet. Changes in classical cardiovascular risk factors, inflammatory biomarkers of atherosclerosis and plaque vulnerability were measured after 12 months of intervention. Results Compared to participants in the low-fat diet group, those receiving MD+EVOO and MD+Nuts showed a higher decrease in systolic (6mmHg) and diastolic (3mmHg) blood pressure (P = 0.02; both), as well as a reduction of 10% and 8% in LDL-cholesterol (P = 0.04), respectively. Patients in the MD+Nuts group showed a significant reduction of 34% in CD40 expression on monocyte surface compared to low-fat diet patients (P = 0.03). In addition, inflammatory biomarkers related to plaque instability such as C-reactive protein and interleukin-6 were reduced by 45% and 35% and 95% and 90% in the MD+EVOO and MD+Nuts groups, respectively (P<0.05; all) compared to the low-fat diet group. Likewise, sICAM and P-selectin were also reduced by 50% and 27%, respectively in the MD+EVOO group (P = 0.04) and P-selectin by 19% in MD+Nuts group (P = 0.04) compared to the low-fat diet group. Conclusions Adherence to the MD is associated with an increase in serum markers of atheroma plaque stability which may explain, at least in part, the protective role of MD against ischemic heart disease. Trial Registration www.controlled-trials.comISRCTN35739639
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Affiliation(s)
- Rosa Casas
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Emilio Sacanella
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- * E-mail:
| | - Mireia Urpí-Sardà
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- Nutrition and Food Science Department, Pharmacy Faculty, University of Barcelona, Barcelona, Spain
| | - Gemma Chiva-Blanch
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Emilio Ros
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- Lipid Clinic, Service of Endocrinology & Nutrition, Hospital Clinic, IDIBAPS, Barcelona, Spain
| | - Miguel-Angel Martínez-González
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- Department of Preventive Medicine and Public Health, School of Medicine, University of Navarra, Pamplona, Spain
| | - Maria-Isabel Covas
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- Cardiovascular Epidemiology Unit, Municipal Institute for Medical Research (IMIM), Barcelona, Spain
| | - Rosa Ma Lamuela-Raventos
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- Nutrition and Food Science Department, Pharmacy Faculty, University of Barcelona, Barcelona, Spain
| | - Jordi Salas-Salvadó
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- Human Nutrition Unit, Hospital Universitari de Sant Joan de Reus, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - Miquel Fiol
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- University Institute for Health Sciences Investigation, Palma de Mallorca, Spain
| | - Fernando Arós
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
- Department of Cardiology, Hospital de Alava, Vitoria, Spain
| | - Ramon Estruch
- Department of Internal Medicine, Hospital Clinic, Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain
- CIBER 06/03: Fisiopatología de la Obesidad y la Nutrición, Instituto de Salud Carlos III, Madrid, Spain
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5
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Biliaieva OO, Korzhyk NP, Myronov OM. [Expedience of application of a dietic therapy in treatment of purulent-septic diseases of soft tissues]. Klin Khir 2014:53-55. [PMID: 25097980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The results of investigation of the dietotherapy impact on the course of purulent-septic process in soft tissues were analyzed. There were operated 58 patients, to 38 of them a certain diet was prescribed. Immediate impact of the diet therapy on the wound process course was established, what was demonstrated by reduction of duration of the earning capacity loss in patients, who have followed a special diet, by 2.58 days.
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6
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Løland KH, Bleie Ø, Strand E, Ueland PM, Nordrehaug JE, Garcia-Garcia HM, Serruys PW, Nygård O. Effect of folic acid supplementation on levels of circulating Monocyte Chemoattractant Protein-1 and the presence of intravascular ultrasound derived virtual histology thin-cap fibroatheromas in patients with stable angina pectoris. PLoS One 2013; 8:e70101. [PMID: 23936148 PMCID: PMC3723764 DOI: 10.1371/journal.pone.0070101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 06/15/2013] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Virtual Histology Intravascular Ultrasound (VH-IVUS) may be used to detect early signs of unstable coronary artery disease. Monocyte Chemoattractant Protein-1 (MCP-1) is linked with coronary atherosclerosis and plaque instability and could potentially be modified by folic acid treatment. METHODS In a randomized, prospective study, 102 patients with stable angina pectoris (SAP) received percutaneous coronary intervention and established medical treatment as well as either homocysteine-lowering folic acid/vitamin B12 (± B6) or placebo (± B6) for 1 year before VH-IVUS was performed. The presence of VH-Thin-Cap Fibroatheroma (VH-TCFA) in non-intervened coronary vessels was registered and serum levels of MCP-1 were measured. The patients were subsequently followed for incident myocardial infarction (MI). RESULTS Patients treated with folic acid/vitamin B12 had a geometric mean (SD) MCP-1 level of 79.95 (1.49) versus 86.00 (1.43) pg/mL for patients receiving placebo (p-value 0.34). VH-TCFA lesions were present in 7.8% of patients and did not differ between intervention arms (p-value 0.47). Serum levels of MCP-1 were 1.46 (95% CI 1.12 to 1.92) times higher in patients with VH-TCFA lesions than in those without (p-value 0.005). Afterwards, patients were followed for median 2.1 years and 3.8% experienced a myocardial infarction (MI), which in post-hoc Cox regression analyses was independently predicted by both MCP-1 (P-value 0.006) and VH-TCFA (p-value 0.01). CONCLUSIONS In patients with SAP receiving established medical treatment, folic acid supplementation is not associated with either presence of VH-TCFA or levels of MCP-1. MCP-1 is however associated with VH-TCFA, a finding corroborated by increased risk for future MI. ClinicalTrials.gov Identifier: NCT00354081.
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Affiliation(s)
- Kjetil H Løland
- Department of Clinical Science, University of Bergen, Bergen, Norway.
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7
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Gopal K, Nagarajan P, Jedy J, Raj AT, Gnanaselvi SK, Jahan P, Sharma Y, Shankar EM, Kumar JM. β-Carotene Attenuates Angiotensin II-Induced Aortic Aneurysm by Alleviating Macrophage Recruitment in Apoe(-/-) Mice. PLoS One 2013; 8:e67098. [PMID: 23826202 PMCID: PMC3694956 DOI: 10.1371/journal.pone.0067098] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 05/15/2013] [Indexed: 12/13/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) is a common chronic degenerative disease characterized by progressive aortic dilation and rupture. The mechanisms underlying the role of α-tocopherol and β-carotene on AAA have not been comprehensively assessed. We investigated if α-tocopherol and β-carotene supplementation could attenuate AAA, and studied the underlying mechanisms utilized by the antioxidants to alleviate AAA. Four-months-old Apoe−/− mice were used in the induction of aneurysm by infusion of angiotensin II (Ang II), and were orally administered with α-tocopherol and β-carotene enriched diet for 60 days. Significant increase of LDL, cholesterol, triglycerides and circulating inflammatory cells was observed in the Ang II-treated animals, and gene expression studies showed that ICAM-1, VCAM-1, MCP-1, M-CSF, MMP-2, MMP-9 and MMP-12 were upregulated in the aorta of aneurysm-induced mice. Extensive plaques, aneurysm and diffusion of inflammatory cells into the tunica intima were also noticed. The size of aorta was significantly (P = 0.0002) increased (2.24±0.20 mm) in the aneurysm-induced animals as compared to control mice (1.17±0.06 mm). Interestingly, β-carotene dramatically controlled the diffusion of macrophages into the aortic tunica intima, and circulation. It also dissolved the formation of atheromatous plaque. Further, β-carotene significantly decreased the aortic diameter (1.33±0.12 mm) in the aneurysm-induced mice (β-carotene, P = 0.0002). It also downregulated ICAM-1, VCAM-1, MCP-1, M-CSF, MMP-2, MMP-9, MMP-12, PPAR-α and PPAR-γ following treatment. Hence, dietary supplementation of β-carotene may have a protective function against Ang II-induced AAA by ameliorating macrophage recruitment in Apoe−/− mice.
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MESH Headings
- Angiotensin II
- Animals
- Antioxidants/administration & dosage
- Aorta, Abdominal/immunology
- Aorta, Abdominal/pathology
- Aortic Aneurysm, Abdominal/diet therapy
- Aortic Aneurysm, Abdominal/immunology
- Aortic Aneurysm, Abdominal/pathology
- Apolipoproteins E/deficiency
- Apolipoproteins E/genetics
- Cholesterol, LDL/metabolism
- Dietary Supplements
- Disease Models, Animal
- Lymphocytes/metabolism
- Lymphocytes/pathology
- Macrophages/metabolism
- Macrophages/pathology
- Male
- Mice, Knockout
- Organ Size
- Plaque, Atherosclerotic/diet therapy
- Plaque, Atherosclerotic/immunology
- Plaque, Atherosclerotic/pathology
- alpha-Tocopherol/administration & dosage
- beta Carotene/administration & dosage
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Affiliation(s)
- Kaliappan Gopal
- Center for Cellular and Molecular Biology, Hyderabad, India
- Department of Orthopedics, National Orthopaedics Center for Excellence in Research and Learning, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Jose Jedy
- Center for Cellular and Molecular Biology, Hyderabad, India
| | - Avinash T. Raj
- Center for Cellular and Molecular Biology, Hyderabad, India
| | | | - Parveen Jahan
- Department of Genetics, Osmania University, Hyderabad, India
| | | | - Esaki M. Shankar
- Tropical Infectious Disease Research and Education Center, Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Jerald M. Kumar
- Center for Cellular and Molecular Biology, Hyderabad, India
- * E-mail:
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Saraste A, Laitinen I, Weidl E, Wildgruber M, Weber AW, Nekolla SG, Hölzlwimmer G, Esposito I, Walch A, Leppänen P, Lisinen I, Luppa PB, Ylä-Herttuala S, Wester HJ, Knuuti J, Schwaiger M. Diet intervention reduces uptake of αvβ3 integrin-targeted PET tracer 18F-galacto-RGD in mouse atherosclerotic plaques. J Nucl Cardiol 2012; 19:775-84. [PMID: 22527796 DOI: 10.1007/s12350-012-9554-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 03/26/2012] [Indexed: 01/16/2023]
Abstract
BACKGROUND Expression of α(v)β(3) integrin has been proposed as a marker for atherosclerotic lesion inflammation. We studied whether diet intervention reduces uptake of α(v)β(3) integrin-targeted positron emission tomography tracer (18)F-galacto-RGD in mouse atherosclerotic plaques. METHODS AND RESULTS Hypercholesterolemic LDLR(-/-) ApoB(100/100) mice on high-fat diet for 4 months were randomized to further 3 months on high-fat diet (high-fat group, n = 8) or regular mouse chow (intervention group, n = 7). Intima-media ratio describing plaque burden was comparable between intervention and high-fat groups (2.0 ± 0.5 vs 2.3 ± 0.8, P = .5). Uptake of (18)F-galacto-RGD in the aorta was lower in the intervention than high-fat group (%ID/g 0.16 vs 0.23, P < .01). Autoradiography showed 35% lower uptake of (18)F-galacto-RGD in the atherosclerotic plaques in the intervention than high-fat group (P = .007). Uptake of (18)F-galacto-RGD in plaques correlated with uptake of (3)H-deoxyglucose and nuclear density, which was lower in the intervention than high-fat group (P = .01). Flow cytometry demonstrated macrophages expressing α(v) and β(3) integrins in the aorta. CONCLUSIONS Uptake of (18)F-galacto-RGD in mouse atherosclerotic lesions was reduced by lipid-lowering diet intervention. Expression of α(v)β(3) integrin is a potential target for evaluation of therapy response in atherosclerosis.
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Affiliation(s)
- Antti Saraste
- Nuklearmedizinische Klinik und Poliklinik, Nuklearmedizinische Klinik der TU München, Klinikum Rechts der Isar, Technische Universität München, Ismaninger Str 22, 81675 Munich, Germany
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