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Xuan Y, Yu C, Ni K, Congcong L, Lixin Q, Qingxian L. Protective effects of tanshinone IIA on Porphyromonas gingivalis-induced atherosclerosis via the downregulation of the NOX2/NOX4-ROS mediation of NF-κB signaling pathway. Microbes Infect 2023; 25:105177. [PMID: 37392987 DOI: 10.1016/j.micinf.2023.105177] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 06/07/2023] [Accepted: 06/25/2023] [Indexed: 07/03/2023]
Abstract
Tanshinone IIA (TSA), an active component isolated from Danshen, possess high medicinal values against atherosclerosis by reducing vascular oxidative stress, inhibiting platelet aggregation, and protecting the endothelium from damage. The periodontal pathogen Porphyromonas gingivalis (P. gingivalis) has been proven to accelerate the development of atherosclerosis. We aim to determine the effects of TSA on P. gingivalis-induced atherosclerosis in ApoE-knockout (ApoE-/-) mice. After feeding with a high-lipid diet and infected with P. gingivalis three times per week for four weeks, TSA-treated (60 mg/kg/d) mice greatly inhibited atherosclerotic lesions both morphologically and biochemically and exhibited significantly reduction ROS, 8-OHdG, and ox-LDL levels in serum compared with P. gingivalis-infected mice. Additionally, TSA-treated mice were observed a marked reduction of ROS, 8-OHdG and ox-LDL in the serum, mRNA levels of COX-2, LOX-1, NOX2 and NOX4 in the aorta, as well as the levels of NOX2, NOX4, and NF-κB. These results suggest that TSA attenuates oxidative stress by decreasing NOX2 and NOX4 and downregulating NF-κB signaling pathway, which might be contributed to the amelioration of atherosclerosis.
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Affiliation(s)
- Yan Xuan
- Department of the Fourth Division, Peking University, School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China
| | - Cai Yu
- Department of Periodontology, Peking University, School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China
| | - Kang Ni
- Department of Periodontology, Peking University, School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China
| | - Lou Congcong
- Department of Periodontology, Peking University, School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China
| | - Qiu Lixin
- Department of the Fourth Division, Peking University, School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China.
| | - Luan Qingxian
- Department of Periodontology, Peking University, School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, 22 Zhongguancun South Avenue, Haidian District, Beijing 100081, PR China.
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Gao Y, Hua R, Peng K, Yin Y, Zeng C, Guo Y, Wang Y, Li L, Li X, Qiu Y, Wang Z. High-starchy carbohydrate diet aggravates NAFLD by increasing fatty acids influx mediated by NOX2. FOOD SCIENCE AND HUMAN WELLNESS 2023. [DOI: 10.1016/j.fshw.2022.10.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Liu Y, Croft KD, Mori TA, Gaspari TA, Kemp-Harper BK, Ward NC. Long-term dietary nitrate supplementation slows the progression of established atherosclerosis in ApoE -/- mice fed a high fat diet. Eur J Nutr 2023; 62:1845-1857. [PMID: 36853380 PMCID: PMC10195750 DOI: 10.1007/s00394-023-03127-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 02/20/2023] [Indexed: 03/01/2023]
Abstract
BACKGROUND AND AIMS Atherosclerosis is associated with a reduction in the bioavailability and/or bioactivity of endogenous nitric oxide (NO). Dietary nitrate has been proposed as an alternate source when endogenous NO production is reduced. Our previous study demonstrated a protective effect of dietary nitrate on the development of atherosclerosis in the apoE-/- mouse model. However most patients do not present clinically until well after the disease is established. The aims of this study were to determine whether chronic dietary nitrate supplementation can prevent or reverse the progression of atherosclerosis after disease is already established, as well as to explore the underlying mechanism of these cardiovascular protective effects. METHODS 60 apoE-/- mice were given a high fat diet (HFD) for 12 weeks to allow for the development of atherosclerosis. The mice were then randomized to (i) control group (HFD + 1 mmol/kg/day NaCl), (ii) moderate-dose group (HFD +1 mmol/kg/day NaNO3), or (iii) high-dose group (HFD + 10 mmol/kg/day NaNO3) (20/group) for a further 12 weeks. A group of apoE-/- mice (n = 20) consumed a normal laboratory chow diet for 24 weeks and were included as a reference group. RESULTS Long-term supplementation with high dose nitrate resulted in ~ 50% reduction in plaque lesion area. Collagen expression and smooth muscle accumulation were increased, and lipid deposition and macrophage accumulation were reduced within atherosclerotic plaques of mice supplemented with high dose nitrate. These changes were associated with an increase in nitrite reductase as well as activation of the endogenous eNOS-NO pathway. CONCLUSION Long-term high dose nitrate significantly attenuated the progression of established atherosclerosis in the apoE-/- mice fed a HFD. This appears to be mediated in part through a XOR-dependent reduction of nitrate to NO, as well as enhanced eNOS activation via increased Akt and eNOS phosphorylation.
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Affiliation(s)
- Yang Liu
- School of Biomedical Sciences, University of Western Australia, Perth, WA Australia
| | - Kevin D. Croft
- School of Biomedical Sciences, University of Western Australia, Perth, WA Australia
| | - Trevor A. Mori
- Medical School, University of Western Australia, Perth, WA Australia
| | - Tracey A. Gaspari
- Department of Pharmacology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC Australia
| | - Barbara K. Kemp-Harper
- Department of Pharmacology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC Australia
| | - Natalie C. Ward
- Medical School, University of Western Australia, Perth, WA Australia
- Dobney Hypertension Centre, Medical School, University of Western Australia, G.P.O Box X2213, Perth, WA 6847 Australia
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Li JX, Tian R, Lu N. Quercetin Attenuates Vascular Endothelial Dysfunction in Atherosclerotic Mice by Inhibiting Myeloperoxidase and NADPH Oxidase Function. Chem Res Toxicol 2023; 36:260-269. [PMID: 36719041 DOI: 10.1021/acs.chemrestox.2c00334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Myeloperoxidase (MPO) exhibits a unique property to use H2O2 to oxidize chloride and lead to the generation of a strong oxidant, hypochlorous acid (HOCl), which plays important roles in atherosclerosis. A lot of evidence indicates that quercetin, a natural polyphenol derived from human diet, effectively contributes to cardiovascular health. Herein, we found that dietary quercetin significantly inhibited vascular endothelial dysfunction and atherosclerosis in apolipoprotein E-deficient (ApoE-/-) mice. Mechanistic studies revealed that dietary quercetin effectively suppressed the MPO level and activity in the vessels of ApoE-/- animals, and p47phox expression and NADPH oxidase activity were simultaneously attenuated after quercetin treatment. In vascular endothelial cells, NADPH oxidase was demonstrated to be the major source of H2O2 formation. Moreover, quercetin effectively attenuated MPO/H2O2-mediated HOCl production and toxicity to human vascular endothelial cells, and this compound was not toxic. The inhibitory effect on MPO activity was likely attributed to that quercetin significantly inhibited NADPH oxidase-derived H2O2 formation in human endothelial cells and could act as an effective mediator for MPO intermediates, subsequently preventing HOCl production by the MPO/H2O2 system. Collectively, it was suggested that quercetin effectively suppressed endothelial dysfunction in atherosclerotic vasculature through the reduction of MPO/NADPH oxidase-mediated HOCl production.
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Affiliation(s)
- Jia-Xin Li
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Ziyang Road 99, Nanchang, Jiangxi 330022, China
| | - Rong Tian
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Ziyang Road 99, Nanchang, Jiangxi 330022, China
| | - Naihao Lu
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Ziyang Road 99, Nanchang, Jiangxi 330022, China
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Wang Y, Chen W, Zhou J, Wang Y, Wang H, Wang Y. Nitrate Metabolism and Ischemic Cerebrovascular Disease: A Narrative Review. Front Neurol 2022; 13:735181. [PMID: 35309590 PMCID: PMC8927699 DOI: 10.3389/fneur.2022.735181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 01/04/2022] [Indexed: 11/23/2022] Open
Abstract
Inorganic and organic nitrates are present in vivo and in vitro. Inorganic nitrate is considered a pool of nitric oxide (NO), but it can be converted into nitrite and NO through various mechanisms. It plays an important role in the regulation of complex physiological and biochemical reactions, such as anti-inflammatory processes and the inhibition of platelet aggregation, which are closely related to the pathology and treatment of cerebrovascular disease. Ischemic cerebrovascular disease is characterized by high incidence, recurrence, and disability rates. Nitrate, nitrite, and NO were recently found to be involved in cerebrovascular disease. In this review, we describe the relationship between cerebrovascular disease and nitrate metabolism to provide a basis for further advances in laboratory and clinical medicine.
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Affiliation(s)
- Yicong Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- Laboratory for Oral and General Health Integration and Translation, Beijing, China
| | - Weiqi Chen
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- Laboratory for Oral and General Health Integration and Translation, Beijing, China
| | - Jian Zhou
- Laboratory for Oral and General Health Integration and Translation, Beijing, China
- School of Stomatology, Capital Medical University, Beijing, China
| | - Yongjun Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Hao Wang
- Laboratory for Oral and General Health Integration and Translation, Beijing, China
- Department of Stomatology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- *Correspondence: Hao Wang
| | - Yilong Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- Laboratory for Oral and General Health Integration and Translation, Beijing, China
- Yilong Wang
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Ohba K, Miyata Y, Shinzato T, Funakoshi S, Maeda K, Matsuo T, Mitsunari K, Mochizuki Y, Nishino T, Sakai H. Effect of oral intake of royal jelly on endothelium function in hemodialysis patients: study protocol for multicenter, double-blind, randomized control trial. Trials 2021; 22:950. [PMID: 34930416 PMCID: PMC8690339 DOI: 10.1186/s13063-021-05926-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 12/08/2021] [Indexed: 11/21/2022] Open
Abstract
Background Hemodialysis (HD) is a common renal replacement therapy for patients with renal failure. Cardiovascular and cerebrovascular diseases are known to shorten survival periods and worsen the quality of life of HD patients. Atherosclerosis is a major cause of vascular diseases, and various factors such as abnormality of lipid metabolism and increased macrophage activity, oxidative stress, and endothelial dysfunction are associated with its pathogenesis and progression. Further, endothelial stem cells (ESCs) have been reported to play important roles in endothelial functions. Royal jelly (RJ) affects atherosclerosis- and endothelial function-related factors. The main aim of this trial is to investigate whether oral intake of RJ can maintain endothelial function in HD patients. In addition, the effects of RJ intake on atherosclerosis, ESC count, inflammation, and oxidative stress will be analyzed. Methods This will be a multicenter, prospective, double-blind, randomized controlled trial. We will enroll 270 participants at Nagasaki Jin Hospital, Shinzato Clinic Urakami, and Maeda Clinic, Japan. The participants will be randomized into RJ and placebo groups. The trial will be conducted according to the principles of the Declaration of Helsinki, and all participants will be required to provide written informed consent. The RJ group will be treated with 3600 mg/day of RJ for 24 months, and the placebo group will be treated with starch for 24 months. The primary endpoint will be the change in flow-mediated dilation (FMD), a parameter of endothelium function, from the time before treatment initiation to 24 months after treatment initiation. The secondary and other endpoints will be changes in FMD; ESC count; serum levels of vascular endothelial cell growth factor, macrophage colony-stimulating factor, 8-hydroxydeoxyguanosine, and malondialdehyde; the incidence of cardiovascular diseases, cerebrovascular diseases, and stenosis of blood access; and safety. Discussion This trial will clarify whether oral intake of RJ can maintain endothelial function and suppress the progression of atherosclerosis in HD patients. In addition, it will clarify the effects of RJ on ESCs, oxidative stress, and angiogenic activity in blood samples. Trial registration The Japan Registry of Clinical Trials jRCTs071200031. Registered on 7 December 2020.
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Affiliation(s)
- Kojiro Ohba
- Department of Urology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
| | - Yasuyoshi Miyata
- Department of Urology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan.
| | - Takeaki Shinzato
- Shinzato Clinic Urakami, 3-20 Mori-machi, Nagasaki, 852-8104, Japan
| | | | - Kanenori Maeda
- Maeda Clinic, 587-2 Shinden-machi, Shimabara, 855-0043, Japan
| | - Tomohiro Matsuo
- Department of Urology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
| | - Kensuke Mitsunari
- Department of Urology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
| | - Yasushi Mochizuki
- Department of Urology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
| | - Tomoya Nishino
- Second Department of Internal Medicine, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
| | - Hideki Sakai
- Department of Urology, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki, 852-8501, Japan
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Carvalho LRRA, Guimarães DD, Flôr AFL, Leite EG, Ruiz CR, de Andrade JT, Monteiro MMO, Balarini CM, Lucena RBD, Sandrim VC, Lundberg JO, Weitzberg E, Carlström M, Braga VDA. Effects of chronic dietary nitrate supplementation on longevity, vascular function and cancer incidence in rats. Redox Biol 2021; 48:102209. [PMID: 34915448 PMCID: PMC8683768 DOI: 10.1016/j.redox.2021.102209] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 12/16/2022] Open
Abstract
RATIONALE Dietary nitrate and nitrite have a notoriously bad reputation because of their proposed association with disease, in particular cancer. However, more recent lines of research have challenged this dogma suggesting that intake of these anions also possess beneficial effects after in vivo conversion to the vital signaling molecule nitric oxide. Such effects include improvement in cardiovascular, renal and metabolic function, which is partly mediated via reduction of oxidative stress. A recent study even indicates that low dose of dietary nitrite extends life span in fruit flies. METHODS In this study, 200 middle-aged Wistar rats of both sexes were supplemented with nitrate or placebo in the drinking water throughout their remaining life and we studied longevity, biochemical markers of disease, vascular reactivity along with careful determination of the cause of death. RESULTS Dietary nitrate did not affect life span or the age-dependent changes in markers of oxidative stress, kidney and liver function, or lipid profile. Ex vivo examination of vascular function, however, showed improvements in endothelial function in rats treated with nitrate. Neoplasms were not more common in the nitrate group. CONCLUSION We conclude that chronic treatment with dietary nitrate does not affect life span in rats nor does it increase the incidence of cancer. In contrast, vascular function was improved by nitrate, possibly suggesting an increase in health span.
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Affiliation(s)
| | - Drielle D Guimarães
- Department of Physiology and Pharmacology - Karolinska Institutet, Stockholm, Sweden
| | | | - Ericka G Leite
- Department of Biotechnology - Federal University of Paraiba, João Pessoa, Brazil
| | - Clara R Ruiz
- Department of Biotechnology - Federal University of Paraiba, João Pessoa, Brazil
| | - Juliana T de Andrade
- Department of Biotechnology - Federal University of Paraiba, João Pessoa, Brazil
| | - Matheus M O Monteiro
- Department of Biotechnology - Federal University of Paraiba, João Pessoa, Brazil
| | - Camille M Balarini
- Department of Biotechnology - Federal University of Paraiba, João Pessoa, Brazil
| | | | | | - Jon O Lundberg
- Department of Physiology and Pharmacology - Karolinska Institutet, Stockholm, Sweden
| | - Eddie Weitzberg
- Department of Physiology and Pharmacology - Karolinska Institutet, Stockholm, Sweden
| | - Mattias Carlström
- Department of Physiology and Pharmacology - Karolinska Institutet, Stockholm, Sweden
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Poznyak AV, Bharadwaj D, Prasad G, Grechko AV, Sazonova MA, Orekhov AN. Renin-Angiotensin System in Pathogenesis of Atherosclerosis and Treatment of CVD. Int J Mol Sci 2021; 22:ijms22136702. [PMID: 34206708 PMCID: PMC8269397 DOI: 10.3390/ijms22136702] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/18/2021] [Accepted: 06/18/2021] [Indexed: 12/25/2022] Open
Abstract
Atherosclerosis has complex pathogenesis, which involves at least three serious aspects: inflammation, lipid metabolism alterations, and endothelial injury. There are no effective treatment options, as well as preventive measures for atherosclerosis. However, this disease has various severe complications, the most severe of which is cardiovascular disease (CVD). It is important to note, that CVD is among the leading causes of death worldwide. The renin–angiotensin–aldosterone system (RAAS) is an important part of inflammatory response regulation. This system contributes to the recruitment of inflammatory cells to the injured site and stimulates the production of various cytokines, such as IL-6, TNF-a, and COX-2. There is also an association between RAAS and oxidative stress, which is also an important player in atherogenesis. Angiotensin-II induces plaque formation at early stages, and this is one of the most crucial impacts on atherogenesis from the RAAS. Importantly, while stimulating the production of ROS, Angiotensin-II at the same time decreases the generation of NO. The endothelium is known as a major contributor to vascular function. Oxidative stress is the main trigger of endothelial dysfunction, and, once again, links RAAS to the pathogenesis of atherosclerosis. All these implications of RAAS in atherogenesis lead to an explicable conclusion that elements of RAAS can be promising targets for atherosclerosis treatment. In this review, we also summarize the data on treatment approaches involving cytokine targeting in CVD, which can contribute to a better understanding of atherogenesis and even its prevention.
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Affiliation(s)
- Anastasia V. Poznyak
- Institute for Atherosclerosis Research, Skolkovo Innovative Center, 121609 Moscow, Russia
- Correspondence: (A.V.P.); (A.N.O.)
| | - Dwaipayan Bharadwaj
- Academy of Scientific and Innovative Research, CSIR-Institute of Genomics and Integrative Biology Campus, New Delhi 110067, India;
- Systems Genomics Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India;
| | - Gauri Prasad
- Systems Genomics Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India;
| | - Andrey V. Grechko
- Federal Research and Clinical Center of Intensive Care Medicine and Rehabilitology, 14-3 Solyanka Street, 109240 Moscow, Russia;
| | - Margarita A. Sazonova
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia;
| | - Alexander N. Orekhov
- Institute for Atherosclerosis Research, Skolkovo Innovative Center, 121609 Moscow, Russia
- Laboratory of Angiopathology, Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia;
- Institute of Human Morphology, 3 Tsyurupa Street, 117418 Moscow, Russia
- Correspondence: (A.V.P.); (A.N.O.)
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Morselli F, Faconti L, Mills CE, Morant S, Chowienczyk PJ, Yeung JA, Cavarape A, Cruickshank JK, Webb AJ. Dietary nitrate prevents progression of carotid subclinical atherosclerosis through blood pressure-independent mechanisms in patients with or at risk of type 2 diabetes mellitus. Br J Clin Pharmacol 2021; 87:4726-4736. [PMID: 33982797 DOI: 10.1111/bcp.14897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 04/30/2021] [Accepted: 05/09/2021] [Indexed: 12/01/2022] Open
Abstract
AIMS To test if 6 months' intervention with dietary nitrate and spironolactone could affect carotid subclinical atherosclerosis and stiffness, respectively, vs. placebo/doxazosin, to control for blood pressure (BP). METHODS A subgroup of participants in our double-blind, randomized-controlled, factorial VaSera trial had carotid imaging. Patients with hypertension and with/at risk of type 2 diabetes were randomized to active nitrate-containing beetroot juice or placebo nitrate-depleted juice, and spironolactone or doxazosin. Vascular ultrasound for carotid diameter (CD, mm) and intima-media thickness (CIMT, mm) was performed at baseline, 3- and 6-months. Carotid local stiffness (CS, m/s) was estimated from aortic pulse pressure (Arteriograph) and carotid lumen area. Data were analysed by modified intention to treat and using mixed-model effect, adjusted for confounders. RESULTS In total, 93 subjects had a baseline evaluation and 86% had follow-up data. No statistical interactions occurred between the juice and drug arms and BP was similar between the juices and between the drugs. Nitrate-containing vs. placebo juice significantly lowered CIMT (-0.06 [95% confidence interval -0.12, -0.01], P = .034), an overall difference of ~8% relative to baseline; but had no effect on CD or CS. Doxazosin appeared to reduce CS from baseline (-0.34 [-0.62, -0.06]) however, no difference was detected vs. spironolactone (-0.15 [-0.46, 0.16]). No differences were detected between spironolactone or doxazosin on CIMT and CD. CONCLUSIONS Our results show that 6 months' intervention with dietary nitrate influences vascular remodelling, but not carotid stiffness or diameter. Neither spironolactone nor doxazosin had a BP-independent effect on carotid structure and function.
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Affiliation(s)
- Franca Morselli
- Department of Clinical Pharmacology, King's College London British Heart Foundation Centre, School of Cardiovascular Medicine and Sciences, UK.,Dipartimento di Area Medica, Clinica Medica, Universita' degli Studi di Udine, Udine, Italy.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Luca Faconti
- Department of Clinical Pharmacology, King's College London British Heart Foundation Centre, School of Cardiovascular Medicine and Sciences, UK.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Charlotte E Mills
- King's College London, Department of Nutritional Sciences, School of Life Course Sciences, London, UK.,Department of Food and Nutritional Sciences, School of Chemistry, Food and Pharmacy, University of Reading, Reading, UK.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Steven Morant
- Medicines Monitoring Unit (MEMO), University of Dundee, UK
| | - Philip J Chowienczyk
- Department of Clinical Pharmacology, King's College London British Heart Foundation Centre, School of Cardiovascular Medicine and Sciences, UK.,King's College London, Department of Nutritional Sciences, School of Life Course Sciences, London, UK.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Joshua Au Yeung
- Department of Clinical Pharmacology, King's College London British Heart Foundation Centre, School of Cardiovascular Medicine and Sciences, UK.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Alessandro Cavarape
- Dipartimento di Area Medica, Clinica Medica, Universita' degli Studi di Udine, Udine, Italy
| | - J Kennedy Cruickshank
- King's College London, Department of Nutritional Sciences, School of Life Course Sciences, London, UK.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Andrew J Webb
- Department of Clinical Pharmacology, King's College London British Heart Foundation Centre, School of Cardiovascular Medicine and Sciences, UK.,Biomedical Research Centre, Clinical Research Facility, 4th Floor, North Wing, St Thomas' Hospital, Guy's and St Thomas' NHS Foundation Trust, London, UK
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Jin Z, Zhou L, Tian R, Lu N. Myeloperoxidase Targets Apolipoprotein A-I for Site-Specific Tyrosine Chlorination in Atherosclerotic Lesions and Generates Dysfunctional High-Density Lipoprotein. Chem Res Toxicol 2021; 34:1672-1680. [PMID: 33861588 DOI: 10.1021/acs.chemrestox.1c00086] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We previously demonstrated that apolipoprotein A-I (apoA-I), the major protein component of high-density lipoprotein (HDL), is an important target for myeloperoxidase (MPO)-catalyzed tyrosine chlorination in the circulation of subjects with cardiovascular diseases. Oxidation of apoA-I by MPO has been reported to deprive HDL of its protective properties. However, the potential effects of MPO-mediated site-specific tyrosine chlorination of apoA-I on dysfunctional HDL formation and atherosclerosis was unclear. Herein, Tyr192 in apoA-I was found to be the major chlorination site in both lesion and plasma HDL from humans with atherosclerosis, while MPO binding to apoA-I was demonstrated by immunoprecipitation studies in vivo. In vitro, MPO-mediated damage of lipid-free apoA-I impaired its ability to promote cellular cholesterol efflux by the ABCA1 pathway, whereas oxidation to lipid-associated apoA-I inhibited lecithin:cholesterol acyltransferase activation, two key steps in reverse cholesterol transport. Compared with native apoA-I, apoA-I containing a Tyr192 → Phe mutation was moderately resistant to oxidative inactivation by MPO. In high-fat-diet-fed apolipoprotein E-deficient mice, compared with native apoA-I, subcutaneous injection with oxidized apoA-I (MPO treated) failed to mediate the lipid content in aortic plaques while mutant apoA-I (Tyr192 → Phe) showed a slightly stronger ability to reduce the lipid content in vivo. Our observations suggest that oxidative damage of apoA-I and HDL involves MPO-dependent site-specific tyrosine chlorination, raising the feasibility of producing MPO-resistant forms of apoA-I that have stronger antiatherosclerotic activity in vivo.
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Affiliation(s)
- Zelong Jin
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Lan Zhou
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Rong Tian
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Naihao Lu
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Jiangxi Key Laboratory of Green Chemistry, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
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High intake of vegetables is linked to lower white blood cell profile and the effect is mediated by the gut microbiome. BMC Med 2021; 19:37. [PMID: 33568158 PMCID: PMC7875684 DOI: 10.1186/s12916-021-01913-w] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 01/14/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Chronic inflammation, which can be modulated by diet, is linked to high white blood cell counts and correlates with higher cardiometabolic risk and risk of more severe infections, as in the case of COVID-19. METHODS Here, we assessed the association between white blood cell profile (lymphocytes, basophils, eosinophils, neutrophils, monocytes and total white blood cells) as markers of chronic inflammation, habitual diet and gut microbiome composition (determined by sequencing of the 16S RNA) in 986 healthy individuals from the PREDICT-1 nutritional intervention study. We then investigated whether the gut microbiome mediates part of the benefits of vegetable intake on lymphocyte counts. RESULTS Higher levels of white blood cells, lymphocytes and basophils were all significantly correlated with lower habitual intake of vegetables, with vegetable intake explaining between 3.59 and 6.58% of variation in white blood cells after adjusting for covariates and multiple testing using false discovery rate (q < 0.1). No such association was seen with fruit intake. A mediation analysis found that 20.00% of the effect of vegetable intake on lymphocyte counts was mediated by one bacterial genus, Collinsella, known to increase with the intake of processed foods and previously associated with fatty liver disease. We further correlated white blood cells to other inflammatory markers including IL6 and GlycA, fasting and post-prandial glucose levels and found a significant relationship between inflammation and diet. CONCLUSION A habitual diet high in vegetables, but not fruits, is linked to a lower inflammatory profile for white blood cells, and a fifth of the effect is mediated by the genus Collinsella. TRIAL REGISTRATION The ClinicalTrials.gov registration identifier is NCT03479866 .
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Luo M, Tian R, Lu N. Quercetin Inhibited Endothelial Dysfunction and Atherosclerosis in Apolipoprotein E-Deficient Mice: Critical Roles for NADPH Oxidase and Heme Oxygenase-1. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:10875-10883. [PMID: 32880455 DOI: 10.1021/acs.jafc.0c03907] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
NADPH oxidase-dependent superoxide (O2·-) production and oxidative stress play important roles in endothelial dysfunction and atherosclerosis. Herein, we investigated the potential effects of dietary quercetin, a flavonoid derived in the diet from vegetables and fruit, on vascular endothelial function and atherosclerosis in the high-fat diet (HFD)-fed apolipoprotein E-deficient (ApoE-/-) mice. Dietary quercetin treatment significantly suppressed endothelial dysfunction and aortic atherosclerosis in HFD-fed ApoE-/- mice (P < 0.05, all cases). Mechanistic studies demonstrated that dietary quercetin significantly attenuated p47phox expression and inhibited NADPH oxidase-derived oxidative stress in the aortas of HFD-fed ApoE-/- mice, while the expression and activity of antioxidant enzyme heme oxygenase-1 (HO-1) was enhanced after quercetin treatment (P < 0.05, all cases). In vitro, it was found that quercetin significantly attenuated NADPH oxidase-derived O2·- formation (75 ± 5.6% for quercetin versus 100 ± 6.0% for the control group, P < 0.01) in endothelial cells through induction of HO-1. In addition, the favorable effects of quercetin on oxidant (i.e., H2O2)-induced endothelial dysfunction could be eliminated by tin protoporphyrin IX (an HO-1 inhibitor) or HO-1-specific siRNA. Our results demonstrated the critical roles of NADPH oxidase and HO-1 for the indirect antioxidant properties of quercetin in vascular diseases.
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Affiliation(s)
- Mengjuan Luo
- College of Chemistry and Chemical Engineering, MOE Key Laboratory of Functional Small Organic Molecule, Jiangxi Normal University, No. 99 Ziyang Road, Nanchang 330022, Jiangxi, People's Republic of China
| | - Rong Tian
- College of Chemistry and Chemical Engineering, MOE Key Laboratory of Functional Small Organic Molecule, Jiangxi Normal University, No. 99 Ziyang Road, Nanchang 330022, Jiangxi, People's Republic of China
| | - Naihao Lu
- College of Chemistry and Chemical Engineering, MOE Key Laboratory of Functional Small Organic Molecule, Jiangxi Normal University, No. 99 Ziyang Road, Nanchang 330022, Jiangxi, People's Republic of China
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