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Zhu Y, Hu Y, Liu Z, Chang L, Geng X, Yin X, Zhao BQ, Fan W. The LPS-inactivating enzyme acyloxyacyl hydrolase protects the brain from experimental stroke. Transl Res 2024; 270:42-51. [PMID: 38522823 DOI: 10.1016/j.trsl.2024.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 02/29/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
Blood-brain-barrier (BBB) disruption is a pathological hallmark of ischemic stroke, and inflammation occurring at the BBB contributes to the pathogenesis of ischemic brain injury. Lipopolysaccharide (LPS), a cell wall component of Gram-negative bacteria, is elevated in patients with acute stroke. The activity of LPS is controlled by acyloxyacyl hydrolase (AOAH), a host enzyme that deacylates LPS to inactivated forms. However, whether AOAH influences the pathogenesis of ischemic stroke remain elusive. We performed in vivo experiments to explore the role and mechanism of AOAH on neutrophil extravasation, BBB disruption, and brain infarction. We found that AOAH was upregulated in neutrophils in peri-infarct areas from mice with transient focal cerebral ischemia. AOAH deficiency increased neutrophil extravasation into the brain parenchyma and proinflammatory cytokine production, broke down the BBB and worsened stroke outcomes in mice. These effects require Toll-like receptor 4 (TLR4) because absence of TLR4 or pharmacologic inhibition of TLR4 signaling prevented the exacerbated inflammation and BBB damage in Aoah-/- mice after ischemic stroke. Importantly, neutrophil depletion or inhibition of neutrophil trafficking by blocking LFA-1 integrin dramatically reduced stroke-induced BBB breakdown in Aoah-/- mice. Furthermore, virus-mediated overexpression of AOAH induced a substantial decrease in neutrophil recruitment that was accompanied by reducing BBB damage and stroke volumes. Our findings show the importance of AOAH in regulating neutrophil-dependent BBB breakdown and cerebral infarction. Consequently, strategies that modulate AOAH may be a new therapeutic approach for treatment of ischemic stroke.
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Affiliation(s)
- Yuanbo Zhu
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Yue Hu
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Zhongwang Liu
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Luping Chang
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Xue Geng
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Xuhui Yin
- Institute of Neuroscience and Third Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China
| | - Bing-Qiao Zhao
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China.
| | - Wenying Fan
- Department of Translational Neuroscience, Jing'an District Centre Hospital of Shanghai, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China.
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Hassan A, Luqman A, Zhang K, Ullah M, Din AU, Xiaoling L, Wang G. Impact of Probiotic Lactiplantibacillus plantarum ATCC 14917 on atherosclerotic plaque and its mechanism. World J Microbiol Biotechnol 2024; 40:198. [PMID: 38727952 DOI: 10.1007/s11274-024-04010-1] [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: 11/29/2023] [Accepted: 04/29/2024] [Indexed: 06/22/2024]
Abstract
Atherosclerosis is viewed as not just as a problem of lipid build-up in blood vessels, but also as a chronic inflammatory disease involving both innate and acquired immunity. In atherosclerosis, the inflammation of the arterial walls is the key characteristic that significantly contributes to both the instability of plaque and the occlusion of arteries by blood clots. These events ultimately lead to stroke and acute coronary syndrome. Probiotics are living microorganisms that, when consumed in the right quantities, offer advantages for one's health. The primary objective of this study was to investigate the influence of Lactiplantibacillus plantarum ATCC 14917 (ATCC 14917) on the development of atherosclerotic plaques and its underlying mechanism in Apo lipoprotein E-knockout (Apoe-/- mice). In this study, Apoe-/- mice at approximately 8 weeks of age were randomly assigned to three groups: a Normal group that received a normal chow diet, a high fat diet group that received a gavage of PBS, and a Lactiplantibacillus plantarum ATCC 14917 group that received a high fat diet and a gavage of 0.2 ml ATCC 14917 (2 × 109 CFU/mL) per day for a duration of 12 weeks. Our strain effectively reduced the size of plaques in Apoe-/- mice by regulating the expression of inflammatory markers, immune cell markers, chemokines/chemokine receptors, and tight junction proteins (TJPs). Specifically, it decreased the levels of inflammatory markers (ICAM-1, CD-60 MCP-1, F4/80, ICAM-1, and VCAM-1) in the thoracic aorta, (Ccr7, cd11c, cd4, cd80, IL-1β, TNF-α) in the colon, and increased the activity of ROS-scavenging enzymes (SOD-1 and SOD-2). It also influenced the expression of TJPs (occludin, ZO-1, claudin-3, and MUC-3). In addition, the treatment of ATCC 14917 significantly reduced the level of lipopolysaccharide in the mesenteric adipose tissue. The findings of our study demonstrated that our strain effectively decreased the size of atherosclerotic plaques by modulating inflammation, oxidative stress, intestinal integrity, and intestinal immunity.
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Affiliation(s)
- Adil Hassan
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing University of Science and Technology, Chongqing, China
| | - Ameer Luqman
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
| | - Kun Zhang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
| | - Mehtab Ullah
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
| | - Ahmad Ud Din
- Plants for Human Health Institute, Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Kannapolis, NC, USA
| | - Liao Xiaoling
- Chongqing Key Laboratory of Nano/Micro Composite Materials and Devices, Chongqing University of Science and Technology, Chongqing, China.
| | - Guixue Wang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China.
- JinFeng Laboratory, Chongqing, 401329, China.
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Zeng M, Hodges JK, Pokala A, Khalafi M, Sasaki GY, Pierson J, Cao S, Brock G, Yu Z, Zhu J, Vodovotz Y, Bruno RS. A green tea extract confection decreases circulating endotoxin and fasting glucose by improving gut barrier function but without affecting systemic inflammation: A double-blind, placebo-controlled randomized trial in healthy adults and adults with metabolic syndrome. Nutr Res 2024; 124:94-110. [PMID: 38430822 DOI: 10.1016/j.nutres.2024.02.001] [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: 11/28/2023] [Revised: 01/11/2024] [Accepted: 02/01/2024] [Indexed: 03/05/2024]
Abstract
Anti-inflammatory activities of catechin-rich green tea extract (GTE) in obese rodents protect against metabolic endotoxemia by decreasing intestinal permeability and absorption of gut-derived endotoxin. However, translation to human health has not been established. We hypothesized that GTE would reduce endotoxemia by decreasing gut permeability and intestinal and systemic inflammation in persons with metabolic syndrome (MetS) compared with healthy persons. A randomized, double-blind, placebo-controlled, crossover trial in healthy adults (n = 19, 34 ± 2 years) and adults with MetS (n = 21, 40 ± 3 years) examined 4-week administration of a decaffeinated GTE confection (890 mg/d total catechins) on serum endotoxin, intestinal permeability, gut and systemic inflammation, and cardiometabolic parameters. Compared with the placebo, the GTE confection decreased serum endotoxin (P = .023) in both healthy persons and those with MetS, while increasing concentrations of circulating catechins (P < .0001) and γ-valerolactones (P = .0001). Fecal calprotectin (P = .029) and myeloperoxidase (P = .048) concentrations were decreased by GTE regardless of health status. Following the ingestion of gut permeability probes, urinary lactose/mannitol (P = .043) but not sucralose/erythritol (P > .05) was decreased by GTE regardless of health status. No between-treatment differences (P > .05) were observed for plasma aminotransferases, blood pressure, plasma lipids, or body mass nor were plasma tumor necrosis factor-α, interleukin-6, or the ratio of lipopolysaccharide-binding protein/soluble cluster of differentiation-14 affected. However, fasting glucose in both study groups was decreased (P = .029) by the GTE confection compared with within-treatment arm baseline concentrations. These findings demonstrate that catechin-rich GTE is effective to decrease circulating endotoxin and improve glycemic control in healthy adults and those with MetS, likely by reducing gut inflammation and small intestinal permeability but without affecting systemic inflammation.
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Affiliation(s)
- Min Zeng
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Joanna K Hodges
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA; Department of Nutritional Sciences, The Pennsylvania State University, State College, PA, 16801, USA
| | - Avinash Pokala
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Mona Khalafi
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Geoffrey Y Sasaki
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Jillian Pierson
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Sisi Cao
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Guy Brock
- Department of Biomedical Informatics, The Ohio State University, Columbus, OH, 43210, USA
| | - Zhongtang Yu
- Department of Animal Sciences, The Ohio State University, Columbus, OH, 43210, USA
| | - Jiangjiang Zhu
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA
| | - Yael Vodovotz
- Department of Food Science and Technology, The Ohio State University, Columbus, OH, 43210, USA
| | - Richard S Bruno
- Human Nutrition Program, The Ohio State University, Columbus, OH, 43210, USA.
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Lu C, Donners MMPC, de Baaij JBJ, Jin H, Otten JJT, Manca M, van Zonneveld AJ, Jukema JW, Kraaijeveld A, Kuiper J, Pasterkamp G, Mees B, Sluimer JC, Cavill R, Karel JMH, Goossens P, Biessen EAL. Identification of a gene network driving the attenuated response to lipopolysaccharide of monocytes from hypertensive coronary artery disease patients. Front Immunol 2024; 15:1286382. [PMID: 38410507 PMCID: PMC10894924 DOI: 10.3389/fimmu.2024.1286382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 01/24/2024] [Indexed: 02/28/2024] Open
Abstract
Introduction The impact of cardiovascular disease (CVD) risk factors, encompassing various biological determinants and unhealthy lifestyles, on the functional dynamics of circulating monocytes-a pivotal cell type in CVD pathophysiology remains elusive. In this study, we aimed to elucidate the influence of CVD risk factors on monocyte transcriptional responses to an infectious stimulus. Methods We conducted a comparative analysis of monocyte gene expression profiles from the CTMM - CIRCULATING CELLS Cohort of coronary artery disease (CAD) patients, at baseline and after lipopolysaccharide (LPS) stimulation. Gene co-expression analysis was used to identify gene modules and their correlations with CVD risk factors, while pivotal transcription factors controlling the hub genes in these modules were identified by regulatory network analyses. The identified gene module was subjected to a drug repurposing screen, utilizing the LINCS L1000 database. Results Monocyte responsiveness to LPS showed a highly significant, negative correlation with blood pressure levels (ρ< -0.4; P<10-80). We identified a ZNF12/ZBTB43-driven gene module closely linked to diastolic blood pressure, suggesting that monocyte responses to infectious stimuli, such as LPS, are attenuated in CAD patients with elevated diastolic blood pressure. This attenuation appears associated with a dampening of the LPS-induced suppression of oxidative phosphorylation. Finally, we identified the serine-threonine inhibitor MW-STK33-97 as a drug candidate capable of reversing this aberrant LPS response. Conclusions Monocyte responses to infectious stimuli may be hampered in CAD patients with high diastolic blood pressure and this attenuated inflammatory response may be reversed by the serine-threonine inhibitor MW-STK33-97. Whether the identified gene module is a mere indicator of, or causal factor in diastolic blood pressure and the associated dampened LPS responses remains to be determined.
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Affiliation(s)
- Chang Lu
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University and Heidelberg University Hospital, Heidelberg, Germany
| | - Marjo M P C Donners
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
| | - Julius B J de Baaij
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
| | - Han Jin
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
- Science for Life Laboratory, KTH - Royal Institute of Technology, Stockholm, Sweden
| | - Jeroen J T Otten
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
| | | | - Anton Jan van Zonneveld
- Department of Internal Medicine (Nephrology), Leiden University Medical Center, Leiden, Netherlands
| | - J Wouter Jukema
- Department of Cardiology, Leiden University Medical Center, Leiden, Netherlands
- Netherlands Heart Institute, Utrecht, Netherlands
| | - Adriaan Kraaijeveld
- Department of Cardiology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Johan Kuiper
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, Leiden, Netherlands
| | - Gerard Pasterkamp
- Circulatory Health Research Center, University Medical Center Utrecht, Utrecht, Netherlands
| | - Barend Mees
- Department of Vascular Surgery, Maastricht University Medical Center, Maastricht, Netherlands
| | - Judith C Sluimer
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
- Centre for Cardiovascular Science (CVS), University of Edinburgh, Edinburgh, United Kingdom
| | - Rachel Cavill
- Department of Advanced Computing Sciences, Maastricht University, Maastricht, Netherlands
| | - Joël M H Karel
- Department of Advanced Computing Sciences, Maastricht University, Maastricht, Netherlands
| | - Pieter Goossens
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
| | - Erik A L Biessen
- Department of Pathology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center, Maastricht, Netherlands
- Institute for Molecular Cardiovascular Research, Klinikum RWTH Aachen, Aachen, Germany
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Tomooka S, Oishi E, Asada M, Sakata S, Hata J, Chen S, Honda T, Suzuki K, Watanabe H, Murayama N, Wada N, Kitazono T, Ninomiya T. Serum Lipopolysaccharide-binding Protein Levels and the Incidence of Metabolic Syndrome in a General Japanese Population: the Hisayama Study. J Epidemiol 2024; 34:1-7. [PMID: 36567128 PMCID: PMC10701254 DOI: 10.2188/jea.je20220232] [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: 08/18/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The association between chronic lipopolysaccharide exposure and the development of metabolic syndrome (MetS) is unclear. In this study we examined the association between serum lipopolysaccharide-binding protein (LBP) levels, an indicator of lipopolysaccharide exposure, and the development of MetS in a general Japanese population. METHODS 1,869 community-dwelling Japanese individuals aged ≥40 years without MetS at baseline examination in 2002-2003 were followed up by repeated examination in 2007-2008. MetS was defined according to the Japanese criteria. Serum LBP levels were classified into quartiles (quartiles 1-4: 2.20-9.56, 9.57-10.78, 10.79-12.18, and 12.19-24.34 µg/mL, respectively). Odds ratios (ORs) for developing MetS were calculated using a logistic regression model. RESULTS At the follow-up survey, 159 participants had developed MetS. Higher serum LBP levels were associated with greater risk of developing MetS after multivariable adjustment for age, sex, smoking, drinking, and exercise habits (OR [95% confidence interval] for quartiles 1-4: 1.00 [reference], 2.92 [1.59-5.37], 3.48 [1.91-6.35], and 3.86 [2.12-7.03], respectively; P for trend <0.001). After additional adjustment for homeostasis model assessment of insulin resistance, this association was attenuated but remained significant (P for trend = 0.007). On the other hand, no significant association was observed after additional adjustment for serum high-sensitivity C-reactive protein (P for trend = 0.07). CONCLUSION In the general Japanese population, our findings suggest that higher serum LBP levels are associated with elevated risk of developing MetS. Low-grade endotoxemia could play a role in the development of MetS through systemic chronic inflammation and insulin resistance.
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Affiliation(s)
- Shoko Tomooka
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of General Dentistry, Graduate School of Dental Sciences, Kyushu University, Fukuoka, Japan
| | - Emi Oishi
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masako Asada
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Anesthesiology and Critical Care Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoko Sakata
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Jun Hata
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Sanmei Chen
- Global Health Nursing, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takanori Honda
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Kosuke Suzuki
- Research Institute, Suntory Global Innovation Center Ltd, Kyoto, Japan
| | - Hiroshi Watanabe
- Research Institute, Suntory Global Innovation Center Ltd, Kyoto, Japan
| | - Norihito Murayama
- Research Institute, Suntory Global Innovation Center Ltd, Kyoto, Japan
| | - Naohisa Wada
- Department of General Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Takanari Kitazono
- Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Toshiharu Ninomiya
- Department of Epidemiology and Public Health, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Center for Cohort Studies, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Menon SN, Zerin F, Ezewudo E, Simon NP, Menon SN, Daniel ML, Green AJ, Pandey A, Mackay CE, Hafez S, Moniri NH, Hasan R. Neflamapimod inhibits endothelial cell activation, adhesion molecule expression, leukocyte attachment and vascular inflammation by inhibiting p38 MAPKα and NF-κB signaling. Biochem Pharmacol 2023:115683. [PMID: 37429422 DOI: 10.1016/j.bcp.2023.115683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/06/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023]
Abstract
Neflamapimod, a selective inhibitor of the alpha isoform of p38 mitogen-activated protein kinase (MAPKα), was investigated for its potential to inhibit lipopolysaccharide (LPS)-induced activation of endothelial cells (ECs), adhesion molecule induction, and subsequent leukocyte attachment to EC monolayers. These events are known to contribute to vascular inflammation and cardiovascular dysfunction. Our results demonstrate that LPS treatment of cultured ECs and rats leads to significant upregulation of adhesion molecules, both in vitro and in vivo, which can be effectively inhibited by Neflamapimod treatment. Western blotting data further reveals that Neflamapimod inhibits LPS-induced phosphorylation of p38 MAPKα and the activation of NF-κB signaling in ECs. Additionally, leukocyte adhesion assays demonstrate a substantial reduction in leukocyte attachment to cultured ECs and the aorta lumen of rats treated with Neflamapimod. Consistent with vascular inflammation, LPS-treated rat arteries exhibit significantly diminished vasodilation response to acetylcholine, however, arteries from rats treated with Neflamapimod maintain their vasodilation capacity, demonstrating its ability to limit LPS-induced vascular inflammation. Overall, our data demonstrate that Neflamapimod effectively inhibits endothelium activation, adhesion molecule expression, and leukocyte attachment, thereby reducing vascular inflammation.
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Affiliation(s)
- Sreelakshmi N Menon
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Farzana Zerin
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Emmanuella Ezewudo
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Nimi P Simon
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Sreeranjini N Menon
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Morgan L Daniel
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Andrea J Green
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Ajay Pandey
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA; Department of Biological Sciences, Augusta University, Augusta, GA, USA
| | | | - Sherif Hafez
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA
| | - Nader H Moniri
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA; Department of Biological Sciences, Augusta University, Augusta, GA, USA
| | - Raquibul Hasan
- Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA; Department of Biomedical Sciences, School of Medicine, Mercer University, Macon, GA, USA.
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Gut Microbiota and Coronary Artery Disease: Current Therapeutic Perspectives. Metabolites 2023; 13:metabo13020256. [PMID: 36837875 PMCID: PMC9963624 DOI: 10.3390/metabo13020256] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
The human gut microbiota is the community of microorganisms living in the human gut. This microbial ecosystem contains bacteria beneficial to their host and plays important roles in human physiology, participating in energy harvest from indigestible fiber, vitamin synthesis, and regulation of the immune system, among others. Accumulating evidence suggests a possible link between compositional and metabolic aberrations of the gut microbiota and coronary artery disease in humans. Manipulating the gut microbiota through targeted interventions is an emerging field of science, aiming at reducing the risk of disease. Among the interventions with the most promising results are probiotics, prebiotics, synbiotics, and trimethylamine N-oxide (TMAO) inhibitors. Contemporary studies of probiotics have shown an improvement of inflammation and endothelial cell function, paired with attenuated extracellular matrix remodeling and TMAO production. Lactobacilli, Bifidobacteria, and Bacteroides are some of the most well studied probiotics in experimental and clinical settings. Prebiotics may also decrease inflammation and lead to reductions in blood pressure, body weight, and hyperlipidemia. Synbiotics have been associated with an improvement in glucose homeostasis and lipid abnormalities. On the contrary, no evidence yet exists on the possible benefits of postbiotic use, while the use of antibiotics is not warranted, due to potentially deleterious effects. TMAO inhibitors such as 3,3-dimethyl-1-butanol, iodomethylcholine, and fluoromethylcholine, despite still being investigated experimentally, appear to possess anti-inflammatory, antioxidant, and anti-fibrotic properties. Finally, fecal transplantation carries conflicting evidence, mandating the need for further research. In the present review we summarize the links between the gut microbiota and coronary artery disease and elaborate on the varied therapeutic measures that are being explored in this context.
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Migliolo L, de A. Boleti A, de O. Cardoso P, Frihling BF, e Silva P, de Moraes LRN. Adipose tissue, systematic inflammation, and neurodegenerative diseases. Neural Regen Res 2023; 18:38-46. [PMID: 35799506 PMCID: PMC9241402 DOI: 10.4103/1673-5374.343891] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Abstract
Systemic inflammation has been suggested to have a pivotal role in atherothrombosis, but the factors that trigger systemic inflammation have not been fully elucidated. Lipopolysaccharide (LPS) is a component of the membrane of Gram-negative bacteria present in the gut that can translocate into the systemic circulation, causing non-septic, low-grade endotoxaemia. Gut dysbiosis is a major determinant of low-grade endotoxaemia via dysfunction of the intestinal barrier scaffold, which is a prerequisite for LPS translocation into the systemic circulation. Experimental studies have demonstrated that LPS is present in atherosclerotic arteries but not in normal arteries. In atherosclerotic plaques, LPS promotes a pro-inflammatory status that can lead to plaque instability and thrombus formation. Low-grade endotoxaemia affects several cell types, including leukocytes, platelets and endothelial cells, leading to inflammation and clot formation. Low-grade endotoxaemia has been described in patients at risk of or with overt cardiovascular disease, in whom low-grade endotoxaemia was associated with atherosclerotic burden and its clinical sequelae. In this Review, we describe the mechanisms favouring the development of low-grade endotoxaemia, focusing on gut dysbiosis and changes in gut permeability; the plausible biological mechanisms linking low-grade endotoxaemia and atherothrombosis; the clinical studies suggesting that low-grade endotoxaemia is a risk factor for cardiovascular events; and the potential therapeutic tools to improve gut permeability and eventually eliminate low-grade endotoxaemia.
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Tousoulis D, Guzik T, Padro T, Duncker DJ, De Luca G, Eringa E, Vavlukis M, Antonopoulos AS, Katsimichas T, Cenko E, Djordjevic-Dikic A, Fleming I, Manfrini O, Trifunovic D, Antoniades C, Crea F. Mechanisms, therapeutic implications, and methodological challenges of gut microbiota and cardiovascular diseases: a position paper by the ESC Working Group on Coronary Pathophysiology and Microcirculation. Cardiovasc Res 2022; 118:3171-3182. [PMID: 35420126 PMCID: PMC11023489 DOI: 10.1093/cvr/cvac057] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 01/27/2022] [Accepted: 02/03/2022] [Indexed: 01/25/2023] Open
Abstract
The human gut microbiota is the microbial ecosystem in the small and large intestines of humans. It has been naturally preserved and evolved to play an important role in the function of the gastrointestinal tract and the physiology of its host, protecting from pathogen colonization, and participating in vitamin synthesis, the functions of the immune system, as well as glucose homeostasis and lipid metabolism, among others. Mounting evidence from animal and human studies indicates that the composition and metabolic profiles of the gut microbiota are linked to the pathogenesis of cardiovascular disease, particularly arterial hypertension, atherosclerosis, and heart failure. In this review article, we provide an overview of the function of the human gut microbiota, summarize, and critically address the evidence linking compositional and functional alterations of the gut microbiota with atherosclerosis and coronary artery disease and discuss the potential of strategies for therapeutically targeting the gut microbiota through various interventions.
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Affiliation(s)
- Dimitris Tousoulis
- 1st Cardiology Department, National and Kapodistrian University of Athens, Vas. Sofias Avenue 114, 11527 Athens, Greece
| | - Tomasz Guzik
- Institute of Cardiovascular Medical Sciences, BHF Glasgow Cardiovascular Research Centre, UK
| | - Teresa Padro
- Sant Pau Institute for Biomedical Research, Barcelona, Spain
| | - Dirk J Duncker
- Department of Cardiology, Thorax Center, Erasmus MC, Rotterdam, the Netherlands
| | - Giuseppe De Luca
- Division of Cardiology, Eastern Piedmont University, Novara, Italy
| | - Etto Eringa
- Institute of Cardiovascular Research, Amsterdam University Medical Center, Amsterdam, the Netherlands
| | | | - Alexios S Antonopoulos
- 1st Cardiology Department, National and Kapodistrian University of Athens, Vas. Sofias Avenue 114, 11527 Athens, Greece
| | - Themistoklis Katsimichas
- 1st Cardiology Department, National and Kapodistrian University of Athens, Vas. Sofias Avenue 114, 11527 Athens, Greece
| | - Edina Cenko
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | | | - Ingrid Fleming
- Centre of Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Olivia Manfrini
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna, Italy
| | | | | | - Filippo Crea
- Department of Cardiology and Pulmonary Sciences, Catholic University of the Sacred Heart, Rome, Italy
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11
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Daikohara K, Akanuma SI, Kubo Y, Hosoya KI. Lipopolysaccharide-Induced Functional Alteration of P-glycoprotein in the Ex Vivo Rat Inner Blood-Retinal Barrier. Int J Mol Sci 2022; 23:ijms232415504. [PMID: 36555148 PMCID: PMC9779076 DOI: 10.3390/ijms232415504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/02/2022] [Accepted: 12/03/2022] [Indexed: 12/13/2022] Open
Abstract
At the inner blood-retinal barrier (BRB), P-glycoprotein (P-gp) contributes to maintaining the homeostasis of substance concentration in the retina by transporting drugs and exogenous toxins from the retina to the circulating blood. Under inflammatory conditions, P-gp activities have been reported to be altered in various tissues. The purpose of this study was to clarify the alterations in P-gp activity at the inner BRB due to lipopolysaccharide (LPS), an inflammatory agent, and the molecular mechanisms of the alterations induced by LPS. Ex vivo P-gp activity was evaluated as luminal accumulation of 7-nitro-2,1,3-benzoxadiazole-cyclosporin A (NBD-CSA), a fluorescent P-gp substrate, in freshly prepared rat retinal capillaries. The luminal NBD-CSA accumulation was significantly decreased in the presence of LPS, indicating that P-gp activity at the inner BRB is reduced by LPS. This LPS-induced attenuation of the luminal NBD-CSA accumulation was abolished by inhibiting toll-like receptor 4 (TLR4), a receptor for LPS. Furthermore, an inhibitor/antagonist of tumor necrosis factor receptor 1, endothelin B receptor, nitric oxide synthase, or protein kinase C (PKC) significantly restored the LPS-induced decrease in the luminal NBD-CSA accumulation. Consequently, it is suggested that the TLR4/PKC pathway is involved in the reduction in P-gp function in the inner BRB by LPS.
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Affiliation(s)
- Kiyotaka Daikohara
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Shin-ichi Akanuma
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
- Correspondence: ; Tel.: +81-76-434-7508
| | - Yoshiyuki Kubo
- Laboratory of Drug Disposition and Pharmacokinetics, Faculty of Pharma-Sciences, Teikyo University, Kaga 2-11-1, Tokyo 173-8605, Japan
| | - Ken-ichi Hosoya
- Department of Pharmaceutics, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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12
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The Anti-Inflammatory Effect of Carrageenan/Echinochrom Complex at Experimental Endotoxemia. Int J Mol Sci 2022; 23:ijms231911702. [PMID: 36233004 PMCID: PMC9570226 DOI: 10.3390/ijms231911702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/22/2022] [Accepted: 09/29/2022] [Indexed: 11/16/2022] Open
Abstract
The anti-inflammatory effects of the CRG/Ech complex in LPS-induced endotoxemia were investigated in vivo in mice and in vitro in LPS-stimulated RAW 264.7 cells and peritoneal macrophages. The results indicated that the CRG/Ech complex suppressed the LPS-induced inflammatory response by reducing the production of ROS and NO in the macrophages. Furthermore, the in vivo experiment indicated that the CRG/Ech complex minimized disorders of the physiological and metabolic processes in mice subjected to LPS intoxication and reduced the levels of proinflammatory cytokines in the mouse serum. The preventive administration of the CRG/Ech complex to mice prevented endotoxin-induced damage in the mouse model of endotoxemia, increased the mice’s resistance to LPS, and prevented increases in the levels of proinflammatory cytokines (TNFα). In this work, we showed by the molecular docking that Ech interacted with carrageenan, and that H-donor and H-acceptor bonds are involved in the formation of the complex.
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13
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Lipopolysaccharides and Cellular Senescence: Involvement in Atherosclerosis. Int J Mol Sci 2022; 23:ijms231911148. [PMID: 36232471 PMCID: PMC9569556 DOI: 10.3390/ijms231911148] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/17/2022] [Accepted: 09/19/2022] [Indexed: 11/17/2022] Open
Abstract
Atherosclerosis is a chronic inflammatory disease of the vascular walls related to aging. Thus far, the roles of cellular senescence and bacterial infection in the pathogenesis of atherosclerosis have been speculated to be independent of each other. Some types of macrophages, vascular endothelial cells, and vascular smooth muscle cells are in a senescent state at the sites of atherosclerotic lesions. Likewise, bacterial infections and accumulations of lipopolysaccharide (LPS), an outer-membrane component of Gram-negative bacteria, have also been observed in the atherosclerotic lesions of patients. This review introduces the integration of these two potential pathways in atherosclerosis. Previous studies have suggested that LPS directly induces cellular senescence in cultured monocytes/macrophages and vascular cells. In addition, LPS enhances the inflammatory properties (senescence-associated secretory phenotype [SASP]) of senescent endothelial cells. Thus, LPS derived from Gram-negative bacteria could exaggerate the pathogenesis of atherosclerosis by inducing and enhancing cellular senescence and the SASP-associated inflammatory properties of specific vascular cells in atherosclerotic lesions. This proposed mechanism can provide novel approaches to preventing and treating this common age-related disease.
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14
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Blanks AM, Pedersen LN, Caslin HL, Mihalick VL, Via J, Canada JM, Van Tassell B, Carbone S, Abbate A, Lee Franco R. LPS differentially affects expression of CD14 and CCR2 in monocyte subsets of Post-STEMI patients with hyperglycemia. Diabetes Res Clin Pract 2022; 191:110077. [PMID: 36089102 DOI: 10.1016/j.diabres.2022.110077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 08/15/2022] [Accepted: 09/02/2022] [Indexed: 11/03/2022]
Abstract
AIMS Following ST-segment elevation myocardial infarction (STEMI), recruitment and activation of monocytes [classical (CD14++CD16-CCR2++), intermediate (CD14++CD16+CCR2+), non-classical (CD14LowCD16++CCR2Low)] are needed for myocardial wound healing. Monocyte surface receptor CC chemokine receptor type 2 (CCR2) is responsible for monocyte chemotaxis to sites of inflammation and the lipopolysaccharide (LPS)-binding protein co-receptor, CD14, is involved in pro-inflammatory monocyte activation. The purpose of this investigation was to determine the effects of ex-vivo LPS activation on monocyte subset CD14 and CCR2 expression in post-STEMI individuals with normal and elevated random blood glucose. METHODS Post-STEMI subjects were identified as normal random glucose (NG, <98 mg/dL, n = 13) or impaired random glucose (IG, ≥98 mg/dL, n = 26) and monocytes were analyzed for non-activated and LPS-activated (1 µg/mL for 4 h) CCR2 and CD14 expression. RESULTS Non-activated intermediate monocytes from IG showed decreased CD14 expression when compared to NG, which was maintained following LPS-activation. The NG group showed a larger absolute reduction in classical CCR2 expression, leading to a significant difference between NG and IG following LPS-activation. CONCLUSION Results suggest a heightened response to pro-inflammatory activation in IG following STEMI, which may impair or delay post-STEMI myocardial healing, and thus increase the incidence of chronic heart failure. NIH 1R34HL121402.
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Affiliation(s)
- Anson M Blanks
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, United States
| | - Lauren N Pedersen
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, United States
| | - Heather L Caslin
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37212, United States
| | - Virginia L Mihalick
- VCU Pauley Heart Center, Department of Internal Medicine, Virginia Commonwealth University, Richmond, VA 23219, United States
| | - Jeremy Via
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, United States
| | - Justin M Canada
- VCU Pauley Heart Center, Department of Internal Medicine, Virginia Commonwealth University, Richmond, VA 23219, United States
| | - Benjamin Van Tassell
- Department of Pharmacotherapy and Outcomes Science, Virginia Commonwealth University, Richmond, VA 23298, United States
| | - Salvatore Carbone
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, United States
| | - Antonio Abbate
- VCU Pauley Heart Center, Department of Internal Medicine, Virginia Commonwealth University, Richmond, VA 23219, United States
| | - R Lee Franco
- Department of Kinesiology and Health Sciences, College of Humanities and Sciences, Virginia Commonwealth University, Richmond, VA 23284, United States.
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15
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Lin TY, Chang YK, Wu MY, Wu TK, Chen CH, Lim PS. Serum Lipopolysaccharide-Binding Protein Levels and Cardiovascular Events in Hemodialysis Patients: A Prospective Cohort Study. Nephrology (Carlton) 2022; 27:877-885. [PMID: 36045565 DOI: 10.1111/nep.14107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/23/2022] [Accepted: 08/27/2022] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Patients with end-stage kidney disease (ESKD) exhibit an elevated cardiovascular risk. Chronic inflammation is one of the main mechanisms of cardiovascular disease (CVD). Lipopolysaccharide has been proposed as a link between systemic inflammation and CVD. Herein, we evaluated whether lipopolysaccharide-binding protein (LBP), a surrogate marker of lipopolysaccharide and consequent inflammation, is associated with cardiovascular events in ESKD. METHODS We performed a prospective cohort study of maintenance hemodialysis patients. Baseline serum LBP levels were categorized into tertiles and also modeled continuously for analyses. Cox regression methods were used to evaluate the association of serum LBP levels with cardiovascular events. RESULTS A total of 360 hemodialysis patients were included in this analysis. During a median follow-up of 3.1 years, 90 (25.0%) patients had cardiovascular events. Patients in the upper tertile of serum LBP levels had a significantly greater risk of cardiovascular events (hazard ratio [HR] 4.87; 95% confidence intervals [CI], 2.12-11.15) than those in the lower tertile, independent of age, sex, hypertension, diabetes, CVD, dialysis vintage, body mass index, non-high-density lipoprotein cholesterol, albumin, phosphorus, high-sensitivity C-reactive protein, and interleukin-6. The association was consistent regardless of whether competing risk of death was accounted for (subdistribution HR 4.87; 95% CI, 1.96-12.11 for upper versus lower tertiles) or serum LBP was analysed as a continuous variable (HR 1.30; 95% CI, 1.02-1.66 per 1 SD increment). CONCLUSIONS Serum LBP levels were independently associated with cardiovascular events in heomodialysis patients. LBP might serve as a novel biomarker for CVD in ESKD.
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Affiliation(s)
- Ting-Yun Lin
- Division of Nephrology, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation.,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Yu-Kang Chang
- Department of Medical Research, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan.,Department of Nursing, Jenteh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan
| | - Ming-Yin Wu
- Division of Renal Medicine, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan
| | - Tsai-Kun Wu
- Department of Nursing, Jenteh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan.,Division of Renal Medicine, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan
| | - Chang-Hsu Chen
- Department of Nursing, Jenteh Junior College of Medicine, Nursing and Management, Miaoli, Taiwan.,Division of Renal Medicine, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan
| | - Paik-Seong Lim
- Division of Renal Medicine, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan.,Institute of Biomedical Science, College of Life Science, National Chung Hsing University, Taichung, Taiwan
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16
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Lund NC, Kayode Y, McReynolds MR, Clemmer DC, Hudson H, Clerc I, Hong HK, Brenchley JM, Bass J, D'Aquila RT, Taylor HE. mTOR regulation of metabolism limits LPS-induced monocyte inflammatory and procoagulant responses. Commun Biol 2022; 5:878. [PMID: 36028574 PMCID: PMC9412771 DOI: 10.1038/s42003-022-03804-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 08/05/2022] [Indexed: 11/30/2022] Open
Abstract
Translocated lipopolysaccharide (LPS) activates monocytes via TLR4 and is hypothesized to increase cardiovascular disease risk in persons living with HIV. We tested whether mTOR activity supports LPS-stimulated monocyte production of pro-inflammatory cytokines and tissue factor (TF), as it propels the inflammatory response in several immune cell types besides monocytes. However, multi-omics analyses here demonstrate that mTOR activates a metabolic pathway that limits abundance of these gene products in monocytes. Treatment of primary human monocytes with catalytic mTOR inhibitors (mTORi) increased LPS-induced polyfunctional responses, including production of IL-1β, IL-6, and the pro-coagulant, TF. NF-κB-driven transcriptional activity is enhanced with LPS stimulation after mTORi treatment to increase expression of F3 (TF). Moreover, intracellular NAD+ availability is restricted due to decreased salvage pathway synthesis. These results document mTOR-mediated restraint of the LPS-induced transcriptional response in monocytes and a metabolic mechanism informing strategies to reverse enhanced risk of coagulopathy in pro-inflammatory states.
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Affiliation(s)
- Nina C Lund
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Yetunde Kayode
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, 13210, USA
| | - Melanie R McReynolds
- Department of Biochemistry and Molecular Biology, Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA, 16802, USA
| | - Deanna C Clemmer
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, 13210, USA
| | - Hannah Hudson
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Isabelle Clerc
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Hee-Kyung Hong
- Division of Endocrinology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Jason M Brenchley
- Barrier Immunity Section, Laboratory of Viral Disease, National Institute of Allergy and Infectious Diseases, Bethesda, MD, 20892, USA
| | - Joseph Bass
- Division of Endocrinology, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Richard T D'Aquila
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA.
| | - Harry E Taylor
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, 13210, USA.
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17
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Horseman M, Panahi L, Udeani G, Tenpas AS, Verduzco Jr. R, Patel PH, Bazan DZ, Mora A, Samuel N, Mingle AC, Leon LR, Varon J, Surani S. Drug-Induced Hyperthermia Review. Cureus 2022; 14:e27278. [PMID: 36039261 PMCID: PMC9403255 DOI: 10.7759/cureus.27278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2022] [Indexed: 11/26/2022] Open
Abstract
Humans maintain core body temperature via a complicated system of physiologic mechanisms that counteract heat/cold fluctuations from metabolism, exertion, and the environment. Overextension of these mechanisms or disruption of body temperature homeostasis leads to bodily dysfunction, culminating in a syndrome analogous to exertional heat stroke (EHS). The inability of this thermoregulatory process to maintain the body temperature is caused by either thermal stress or certain drugs. EHS is a syndrome characterized by hyperthermia and the activation of systemic inflammation. Several drug-induced hyperthermic syndromes may resemble EHS and share common mechanisms. The purpose of this article is to review the current literature and compare exertional heat stroke (EHS) to three of the most widely studied drug-induced hyperthermic syndromes: malignant hyperthermia (MH), neuroleptic malignant syndrome (NMS), and serotonin syndrome (SS). Drugs and drug classes that have been implicated in these conditions include amphetamines, diuretics, cocaine, antipsychotics, metoclopramide, selective serotonin reuptake inhibitors (SSRIs), tricyclic antidepressants (TCAs), and many more. Observations suggest that severe or fulminant cases of drug-induced hyperthermia may evolve into an inflammatory syndrome best described as heat stroke. Their underlying mechanisms, symptoms, and treatment approaches will be reviewed to assist in accurate diagnosis, which will impact the management of potentially life-threatening complications.
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18
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Dwaib HS, AlZaim I, Ajouz G, Eid AH, El-Yazbi A. Sex Differences in Cardiovascular Impact of Early Metabolic Impairment: Interplay between Dysbiosis and Adipose Inflammation. Mol Pharmacol 2022; 102:481-500. [PMID: 34732528 DOI: 10.1124/molpharm.121.000338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 10/23/2021] [Indexed: 11/22/2022] Open
Abstract
The evolving view of gut microbiota has shifted toward describing the colonic flora as a dynamic organ in continuous interaction with systemic physiologic processes. Alterations of the normal gut bacterial profile, known as dysbiosis, has been linked to a wide array of pathologies. Of particular interest is the cardiovascular-metabolic disease continuum originating from positive energy intake and high-fat diets. Accumulating evidence suggests a role for sex hormones in modulating the gut microbiome community. Such a role provides an additional layer of modulation of the early inflammatory changes culminating in negative metabolic and cardiovascular outcomes. In this review, we will shed the light on the role of sex hormones in cardiovascular dysfunction mediated by high-fat diet-induced dysbiosis, together with the possible involvement of insulin resistance and adipose tissue inflammation. Insights into novel therapeutic interventions will be discussed as well. SIGNIFICANCE STATEMENT: Increasing evidence implicates a role for dysbiosis in the cardiovascular complications of metabolic dysfunction. This minireview summarizes the available data on the sex-based differences in gut microbiota alterations associated with dietary patterns leading to metabolic impairment. A role for a differential impact of adipose tissue inflammation across sexes in mediating the cardiovascular detrimental phenotype following diet-induced dysbiosis is proposed. Better understanding of this pathway will help introduce early approaches to mitigate cardiovascular deterioration in metabolic disease.
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Affiliation(s)
- Haneen S Dwaib
- Department of Pharmacology and Toxicology, Faculty of Medicine (H.S.D., I.A., G.A., A.E.-Y.), Department of Nutrition and Food Sciences, Faculty of Agricultural and Food Sciences (H.S.D.), American University of Beirut, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon (I.A.); Department of Basic Medical Sciences, College of Medicine (A.H.E.), Biomedical and Pharmaceutical Research Unit, QU Health (A.H.E.), Qatar University, Doha, Qatar; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt (A.E.-Y.); and Faculty of Pharmacy, Alalamein International University, Alalamein, Egypt (A.E.-Y.)
| | - Ibrahim AlZaim
- Department of Pharmacology and Toxicology, Faculty of Medicine (H.S.D., I.A., G.A., A.E.-Y.), Department of Nutrition and Food Sciences, Faculty of Agricultural and Food Sciences (H.S.D.), American University of Beirut, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon (I.A.); Department of Basic Medical Sciences, College of Medicine (A.H.E.), Biomedical and Pharmaceutical Research Unit, QU Health (A.H.E.), Qatar University, Doha, Qatar; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt (A.E.-Y.); and Faculty of Pharmacy, Alalamein International University, Alalamein, Egypt (A.E.-Y.)
| | - Ghina Ajouz
- Department of Pharmacology and Toxicology, Faculty of Medicine (H.S.D., I.A., G.A., A.E.-Y.), Department of Nutrition and Food Sciences, Faculty of Agricultural and Food Sciences (H.S.D.), American University of Beirut, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon (I.A.); Department of Basic Medical Sciences, College of Medicine (A.H.E.), Biomedical and Pharmaceutical Research Unit, QU Health (A.H.E.), Qatar University, Doha, Qatar; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt (A.E.-Y.); and Faculty of Pharmacy, Alalamein International University, Alalamein, Egypt (A.E.-Y.)
| | - Ali H Eid
- Department of Pharmacology and Toxicology, Faculty of Medicine (H.S.D., I.A., G.A., A.E.-Y.), Department of Nutrition and Food Sciences, Faculty of Agricultural and Food Sciences (H.S.D.), American University of Beirut, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon (I.A.); Department of Basic Medical Sciences, College of Medicine (A.H.E.), Biomedical and Pharmaceutical Research Unit, QU Health (A.H.E.), Qatar University, Doha, Qatar; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt (A.E.-Y.); and Faculty of Pharmacy, Alalamein International University, Alalamein, Egypt (A.E.-Y.)
| | - Ahmed El-Yazbi
- Department of Pharmacology and Toxicology, Faculty of Medicine (H.S.D., I.A., G.A., A.E.-Y.), Department of Nutrition and Food Sciences, Faculty of Agricultural and Food Sciences (H.S.D.), American University of Beirut, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, Faculty of Medicine, American University of Beirut, Beirut, Lebanon (I.A.); Department of Basic Medical Sciences, College of Medicine (A.H.E.), Biomedical and Pharmaceutical Research Unit, QU Health (A.H.E.), Qatar University, Doha, Qatar; Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt (A.E.-Y.); and Faculty of Pharmacy, Alalamein International University, Alalamein, Egypt (A.E.-Y.)
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19
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Milenkovic D, Capel F, Combaret L, Comte B, Dardevet D, Evrard B, Guillet C, Monfoulet LE, Pinel A, Polakof S, Pujos-Guillot E, Rémond D, Wittrant Y, Savary-Auzeloux I. Targeting the gut to prevent and counteract metabolic disorders and pathologies during aging. Crit Rev Food Sci Nutr 2022; 63:11185-11210. [PMID: 35730212 DOI: 10.1080/10408398.2022.2089870] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Impairment of gut function is one of the explanatory mechanisms of health status decline in elderly population. These impairments involve a decline in gut digestive physiology, metabolism and immune status, and associated to that, changes in composition and function of the microbiota it harbors. Continuous deteriorations are generally associated with the development of systemic dysregulations and ultimately pathologies that can worsen the initial health status of individuals. All these alterations observed at the gut level can then constitute a wide range of potential targets for development of nutritional strategies that can impact gut tissue or associated microbiota pattern. This can be key, in a preventive manner, to limit gut functionality decline, or in a curative way to help maintaining optimum nutrients bioavailability in a context on increased requirements, as frequently observed in pathological situations. The aim of this review is to give an overview on the alterations that can occur in the gut during aging and lead to the development of altered function in other tissues and organs, ultimately leading to the development of pathologies. Subsequently is discussed how nutritional strategies that target gut tissue and gut microbiota can help to avoid or delay the occurrence of aging-related pathologies.
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Affiliation(s)
- Dragan Milenkovic
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Frédéric Capel
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Lydie Combaret
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Blandine Comte
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Dominique Dardevet
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Bertrand Evrard
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Christelle Guillet
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | | | - Alexandre Pinel
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Sergio Polakof
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Estelle Pujos-Guillot
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Didier Rémond
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
| | - Yohann Wittrant
- Human Nutrition Unit, UMR1019, University Clermont Auvergne, INRAE, Clermont-Ferrand, France
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20
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Plochg BFJ, Englert H, Rangaswamy C, Konrath S, Malle M, Lampalzer S, Beisel C, Wollin S, Frye M, Aberle J, Kluwe J, Renné T, Mailer RK. Liver damage promotes pro-inflammatory T-cell responses against apolipoprotein B-100. J Intern Med 2022; 291:648-664. [PMID: 34914849 DOI: 10.1111/joim.13434] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Liver-derived apolipoprotein B-100 (ApoB100) is an autoantigen that is recognized by atherogenic CD4+ T cells in cardiovascular disease (CVD). CVD is a major mortality risk for patients with chronic inflammatory liver diseases. However, the impact of liver damage for ApoB100-specific T-cell responses is unknown. METHODS We identified ApoB100-specific T cells in blood from healthy controls, nonalcoholic fatty liver disease (NAFLD) patients, and CVD patients by activation-induced marker expression and analyzed their differentiation pattern in correlation to the lipid profile and liver damage parameters in a cross-sectional study. To assess the induction of extrahepatic ApoB100-specific T cells upon transient liver damage in vivo, we performed hydrodynamic tail vein injections with diphtheria toxin A (DTA)-encoding plasmid in human ApoB100-transgenic mice. RESULTS Utilizing immunodominant ApoB100-derived peptides, we found increased ApoB100-specific T-cell populations in NAFLD and CVD patients compared to healthy controls. In a peptide-specific manner, ApoB100 reactivity in healthy controls was accompanied by expression of the regulatory T (Treg)-cell transcription factor FOXP3. In contrast, FOXP3 expression decreased, whereas expression of pro-inflammatory cytokine interleukin (IL)-17A increased in ApoB100-specific T cells from NAFLD and CVD patients. Dyslipidemia and liver damage parameters in blood correlated with reduced FOXP3 expression and elevated IL-17A production in ApoB100-specific T-cell populations, respectively. Moreover, DTA-mediated transient liver damage in human ApoB100-transgenic mice accumulated IL-17a-expressing ApoB100-specific T cells in the periphery. CONCLUSION Our results show that liver damage promotes pro-inflammatory ApoB100-specific T-cell populations, thereby providing a cellular mechanism for the increased CVD risk in liver disease patients.
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Affiliation(s)
- Bastian F J Plochg
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Hanna Englert
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Chandini Rangaswamy
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sandra Konrath
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mandy Malle
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sibylle Lampalzer
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Claudia Beisel
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Hamburg, Germany
| | - Salma Wollin
- Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Section Endocrinology and Diabetology, University Obesity Centre Hamburg, University Hospital Hamburg-Eppendorf, Germany
| | - Maike Frye
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Aberle
- Medical Clinic and Polyclinic, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,Section Endocrinology and Diabetology, University Obesity Centre Hamburg, University Hospital Hamburg-Eppendorf, Germany
| | - Johannes Kluwe
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Renné
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Reiner K Mailer
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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21
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Anto L, Blesso CN. Interplay Between Diet, the Gut Microbiome, and Atherosclerosis: Role of Dysbiosis and Microbial Metabolites on Inflammation and Disordered Lipid Metabolism. J Nutr Biochem 2022; 105:108991. [DOI: 10.1016/j.jnutbio.2022.108991] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/21/2021] [Accepted: 02/22/2022] [Indexed: 12/16/2022]
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22
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Shrout MR, Madison AA, Renna ME, Alfano CM, Povoski SP, Lipari AM, Agnese DM, Carson WE, Malarkey WB, Bailey MT, Kiecolt-Glaser JK. The gut connection: Intestinal permeability as a pathway from breast cancer survivors' relationship satisfaction to inflammation across treatment. Brain Behav Immun 2022; 100:145-154. [PMID: 34808291 PMCID: PMC8769505 DOI: 10.1016/j.bbi.2021.11.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 11/07/2021] [Accepted: 11/13/2021] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Breast cancer survivors are prone to weakened gut barriers, allowing bacteria to migrate into the blood stream. Gut permeability fuels inflammation, which, among survivors, can elevate risk for comorbid disease development, cancer recurrence, and a poor quality of life; however, survivors' satisfying relationships can provide health benefits. This longitudinal study used a conceptual model addressing how intimate relationships is associated with health through changes in gut permeability and inflammation. METHOD Breast cancer survivors (n = 139, stages 0-IIIC) completed a baseline visit before treatment and two follow-up visits 6 and 18 months after treatment ended. Women who had an abnormal breast cancer test followed by a benign diagnosis completed visits within a comparable timeframe (noncancer patient controls; n = 69). All women completed questionnaires assessing their relationship satisfaction and provided blood samples to assess two bacterial endotoxin biomarkers, lipopolysaccharide-binding protein (LBP) and soluble CD14 (sCD14), as well as C-reactive protein (CRP) and interleukin 6 (IL-6). RESULTS Within-person multilevel mediation analyses showed that when a survivor's relationship satisfaction was higher than usual, her own LBP and LBP/sCD14 were lower, which was associated with lower than her own average CRP and IL-6 (95% CIs [-0.0104, -0.0002]). IL-6 was also higher when older survivors, but not younger survivors, experienced higher than usual intestinal permeability (p = .001). These effects of satisfying relationships held after accounting for cancer-related and behavioral factors. Post-hoc analyses showed LBP, sCD14, and LBP/sCD14 were associated with CRP for the cancer survivors, but only LBP and LBP/sCD14 were linked to CRP among the noncancer control patients. CONCLUSION The gut environment is a new promising candidate for understanding a relationship's long-term health impact, particularly among those with elevated health risks. Survivors may reap multiple physiological benefits from satisfying relationships.
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Affiliation(s)
- M Rosie Shrout
- Department of Human Development and Family Studies, Purdue University, West Lafayette, IN, USA; Center on Aging and the Life Course, Purdue University, West Lafayette, IN, USA.
| | - Annelise A Madison
- Institute for Behavioral Medicine Research, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Psychology, The Ohio State University, Columbus, OH, USA
| | - Megan E Renna
- School of Psychology, University of Southern Mississippi, Hattiesburg, MS, USA
| | | | - Stephen P Povoski
- Comprehensive Cancer Center, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Surgery, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Adele M Lipari
- Comprehensive Cancer Center, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Surgery, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Doreen M Agnese
- Comprehensive Cancer Center, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Surgery, The Ohio State University College of Medicine, Columbus, OH, USA
| | - William E Carson
- Comprehensive Cancer Center, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Surgery, The Ohio State University College of Medicine, Columbus, OH, USA
| | - William B Malarkey
- Institute for Behavioral Medicine Research, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH, USA
| | - Michael T Bailey
- Institute for Behavioral Medicine Research, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Pediatrics, The Ohio State College of Medicine, Columbus, OH, USA; Center for Microbial Pathogenesis, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA; Oral and Gastrointestinal Microbiology Research Affinity Group, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Janice K Kiecolt-Glaser
- Institute for Behavioral Medicine Research, The Ohio State University College of Medicine, Columbus, OH, USA; Department of Psychiatry and Behavioral Health, The Ohio State University College of Medicine, Columbus, OH, USA
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23
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Fu Y, Liu JW, Wu J, Wu ZX, Li J, Ji HF, Liang NP, Zhang HJ, Lai ZQ, Dong YF. Inhibition of semaphorin-3a alleviates lipopolysaccharide-induced vascular injury. Microvasc Res 2022; 142:104346. [DOI: 10.1016/j.mvr.2022.104346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/15/2022] [Accepted: 02/15/2022] [Indexed: 10/19/2022]
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24
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Geng S, Pradhan K, Li L. Signal-Strength and History-Dependent Innate Immune Memory Dynamics in Health and Disease. Handb Exp Pharmacol 2022; 276:23-41. [PMID: 34085119 DOI: 10.1007/164_2021_485] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Innate immunity exhibits memory characteristics, reflected not only in selective recognition of external microbial or internal damage signals, but more importantly in history and signal-strength dependent reprogramming of innate leukocytes characterized by priming, tolerance, and exhaustion. Key innate immune cells such as monocytes and neutrophils can finely discern and attune to the duration and intensity of external signals through rewiring of internal signaling circuitries, giving rise to a vast array of discreet memory phenotypes critically relevant to managing tissue homeostasis as well as diverse repertoires of inflammatory conditions. This review will highlight recent advances in this rapidly expanding field of innate immune programming and memory, as well as its translational implication in the pathophysiology of selected inflammatory diseases.
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Affiliation(s)
- Shuo Geng
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Kisha Pradhan
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Liwu Li
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA.
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25
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Wang P, Wang Y, Peng H, Wang J, Zheng Q, Wang P, Wang J, Zhang H, Huang Y, Xiong L, Zhang R, Xia Y, Wang QK, Xu C. Functional rare variant in a C/EBP beta binding site in NINJ2 gene increases the risk of coronary artery disease. Aging (Albany NY) 2021; 13:25393-25407. [PMID: 34897030 PMCID: PMC8714150 DOI: 10.18632/aging.203755] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 11/11/2021] [Indexed: 11/26/2022]
Abstract
Objective: NINJ2 regulates activation of vascular endothelial cells, and genome-wide association studies showed that variants in NINJ2 confer risk to stroke. However, whether variants in NINJ2 are associated with coronary artery disease (CAD) is unknown. Methods: We genotyped rs34166160 in NINJ2 in two independent Chinese GeneID populations which included 2,794 CAD cases and 4,131 controls, and performed genetics association studies. Functional studies were also performed to reveal the mechanisms. Results: Allele rs34166160 significantly confers risk to CAD in the GeneID Hubei population which contained 1,440 CAD cases and 2,660 CAD-free controls (observed P-obs = 6.39 × 10−3 with an odds ratio (OR) was 3.39, adjusted P-adj = 8.12 × 10−3 with an OR of 3.10). The association was replicated in another population, GeneID Shandong population contained 1,354 CAD cases and 1,471 controls (P-obs = 3.33 × 10−3 with an OR of 3.14, P-adj = 0.01 with an OR of 2.74). After combining the two populations, the association was more significant (P-obs = 1.57 × 10−5 with an OR of 3.58, P-adj = 3.41 × 10−4 with an OR of 2.80). In addition, we found that rs34166160 was associated with the mRNA expression level of NINJ2 and the flanking region of rs34166160 can directly bind with transcriptional factor CCAAT-box/enhancer-binding protein beta, and the risk A allele has more transcription activity than non-risk C allele with or without LPS in HUVEC cells. Conclusions: Our study demonstrates that the functional rare variant rs34166160 in NINJ2 confers risk to CAD for the first time, and these findings further expand the range of the pathology of CAD and atherosclerosis.
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Affiliation(s)
- Pengyun Wang
- Department of Clinical Laboratory, Liyuan Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yifan Wang
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Huixin Peng
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Jingjing Wang
- State Key Laboratory for Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, PR China
| | - Qian Zheng
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Pengxia Wang
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Jing Wang
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Hongfu Zhang
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Yufeng Huang
- Precision Medical Laboratory, Tongji Medical College, Wuhan Children's Hospital (Wuhan Maternal and Child Health Care Hospital), Huazhong University of Science and Technology, Wuhan, PR China
| | - Liang Xiong
- Department of Clinical Laboratory, Liyuan Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Rongfeng Zhang
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
| | - Yunlong Xia
- Department of Cardiology, First Affiliated Hospital of Dalian Medical University, Dalian, PR China
| | - Qing K Wang
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
| | - Chengqi Xu
- Human Genome Research Center, Cardio-X Institute, College of Life Science and Technology of Huazhong University of Science and Technology, Wuhan, PR China
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26
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Yang T, Minami M, Yoshida K, Nagata M, Yamamoto Y, Takayama N, Suzuki K, Miyata T, Okawa M, Miyamoto S. Niclosamide downregulates LOX-1 expression in mouse vascular smooth muscle cells and changes the composition of atherosclerotic plaques in ApoE -/- mice. Heart Vessels 2021; 37:517-527. [PMID: 34807278 DOI: 10.1007/s00380-021-01983-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 11/05/2021] [Indexed: 11/28/2022]
Abstract
Genetic lineage tracing studies have shown that phenotypic switching of vascular smooth muscle cells (VSMCs) results in less-differentiated cells, including macrophage-like cells that lack traditional VSMC markers. This switching contributes to the formation of necrotic core in plaques and promotes atherosclerosis, which is important for plaque stability. Niclosamide, a commonly used anti-helminthic drug, has recently attracted attention as an anti-cancer drug that inhibits multiple signaling pathways. The expression of the S100A4 protein is upregulated in synthetic VSMCs and inhibited by niclosamide on metastatic progression in colon cancer. We aimed to test the effect of niclosamide on VSMC phenotype switching and plaque stability. To examine murine atherosclerosis, we induced experimental lesions by blood flow cessation in apolipoprotein E knockout mice fed a high-fat diet. Oral administration of niclosamide changed 4-week-old plaques to collagen-rich and less-necrotic core phenotypes and downregulated the expression of lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) in vivo. In vitro analysis indicated that niclosamide reduced LOX-1 expression in VSMCs in a concentration-dependent and S100A4-independent manner. The inhibitory effect of niclosamide on LOX-1 and collagen type I was associated with the inactivation of the nuclear factor-κB signaling pathway. We demonstrated that the administration of niclosamide reduced LOX-1 expression and altered the composition of murine carotid plaques. Our results highlight the potential of niclosamide as an atheroprotective agent that enhances atherosclerotic plaque stability.
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Affiliation(s)
- Tao Yang
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Clinical Innovative Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Manabu Minami
- Department of Clinical Innovative Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Kazumichi Yoshida
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - Manabu Nagata
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Clinical Innovative Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Yu Yamamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Clinical Innovative Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Naoki Takayama
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Keita Suzuki
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Takeshi Miyata
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan.,Department of Clinical Innovative Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Masakazu Okawa
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Susumu Miyamoto
- Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogun, Sakyo-ku, Kyoto, 606-8507, Japan
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27
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Alshareef GH, Mohammed AE, Abumaree M, Basmaeil YS. Phenotypic and Functional Responses of Human Decidua Basalis Mesenchymal Stem/Stromal Cells to Lipopolysaccharide of Gram-Negative Bacteria. STEM CELLS AND CLONING-ADVANCES AND APPLICATIONS 2021; 14:51-69. [PMID: 34754198 PMCID: PMC8572118 DOI: 10.2147/sccaa.s332952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 10/11/2021] [Indexed: 12/24/2022]
Abstract
Introduction Human decidua basalis mesenchymal stem cells (DBMSCs) are potential therapeutics for the medication to cure inflammatory diseases, like atherosclerosis. The current study investigates the capacity of DBMSCs to stay alive and function in a harmful inflammatory environment induced by high levels of lipopolysaccharide (LPS). Methods DBMSCs were exposed to different levels of LPS, and their viability and functional responses (proliferation, adhesion, and migration) were examined. Furthermore, DBMSCs’ expression of 84 genes associated with their functional activities in the presence of LPS was investigated. Results Results indicated that LPS had no significant effect on DBMSCs’ adhesion, migration, and proliferation (24 h and 72 h) (p > 0.05). However, DBMSCs’ proliferation was significantly reduced at 10 µg/mL of LPS at 48 h (p < 0.05). In addition, inflammatory cytokines and receptors related to adhesion, proliferation, migration, and differentiation were significantly overexpressed when DBMSCs were treated with 10 µg/mL of LPS (p < 0.05). Conclusion These results indicated that DBMSCs maintained their functional activities (proliferation, adhesion, and migration) in the presence of LPS as there was no variation between the treated DBMSCs and the control group. This study will lay the foundation for future preclinical and clinical studies to confirm the appropriateness of DBMSCs as a potential medication to cure inflammatory diseases, like atherosclerosis.
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Affiliation(s)
- Ghofran Hasan Alshareef
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, 84428, Saudi Arabia
| | - Afrah E Mohammed
- Biology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, 84428, Saudi Arabia
| | - Mohammed Abumaree
- Stem Cell & Regenerative Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia.,College of Science and Health Professions, King Saud bin Abdulaziz University for Health Sciences, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh, 11481, Saudi Arabia
| | - Yasser S Basmaeil
- Stem Cell & Regenerative Medicine Department, King Abdullah International Medical Research Center, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
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28
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Zubair K, You C, Kwon G, Kang K. Two Faces of Macrophages: Training and Tolerance. Biomedicines 2021; 9:biomedicines9111596. [PMID: 34829825 PMCID: PMC8615871 DOI: 10.3390/biomedicines9111596] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/25/2021] [Accepted: 10/29/2021] [Indexed: 01/16/2023] Open
Abstract
Macrophages are present in almost all body tissues. They detect and quickly respond to “environmental signals” in the tissue. Macrophages have been associated with numerous beneficial roles, such as host defense, wound healing, and tissue regeneration; however, they have also been linked to the development of diverse illnesses, particularly cancers and autoimmune disorders. Complex signaling, epigenetic, and metabolic pathways drive macrophage training and tolerance. The induced intracellular program differs depending on the type of initial stimuli and the tissue microenvironment. Due to the essential roles of macrophages in homeostatic and their association with the pathogenesis of inflammatory diseases, recent studies have investigated the molecular mechanisms of macrophage training and tolerance. This review discusses the role of factors involved in macrophage training and tolerance, along with the current studies in human diseases.
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29
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Tian X, Ding Y, Kong Y, Wang G, Wang S, Cheng D. Purslane (Portulacae oleracea L.) attenuates cadmium-induced hepatorenal and colonic damage in mice: Role of chelation, antioxidant and intestinal microecological regulation. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 92:153716. [PMID: 34481339 DOI: 10.1016/j.phymed.2021.153716] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 07/24/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Cadmium (Cd) is a representative pernicious metal, which has high biological toxicity. Its precaution through dietary administration is considered an important strategy. Considering that Portulaca oleracea L. (Por.L) has antioxidant, anti-inflammatory and other high medicinal value, and purslane insoluble dietary fiber (PIDF) has good binding property to metal ions, they could be good methods for Cd-induced biotoxicity therapy. PURPOSE To investigate the beneficial effects of Por.L or PIDF against Cd-induced subchronic toxicity and identify its underlying mechanisms. STUDY DESIGN AND METHODS C57BL/6 male mice (n = 12) were received 100 mg l-1 CdCl2 in water for 8 weeks. Mice were divided into four groups: Control, Cd-treated, 8% Por.L + Cd, and 8% PIDF + Cd. Histological evaluation, inductively coupled plasma-mass spectrometry, western blotting analysis, quantitative real time-PCR, gas chromatography-mass spectrometry and 16S rDNA analysis were used in the study. RESULTS Por.L treatment was able to inhibit inflammation and accumulation of Cd, enhance the activity of antioxidant enzymes, increase beneficial bacterial species of Akkermansia and Faecalibaculum and suppress the production of inflammatory cytokines in the colon, such as TNF-α, IL-6, IL-1β and IFN-γ. PIDF mainly relieved the toxicity of Cd by increasing the production of short chain fatty acids with anti-inflammatory functions and repressing the liver and kidney inflammation mediated by the TLR4/ MyD88/NF-κB pathway. CONCLUSION Our study has demonstrated that the antagonistic-Cd effects of Por.L might be mediated via chelation, antioxidation, regulation of intestinal microecology. Thus, our study provides a novel insight into Por.L as a promising function food for the anti-Cd biotoxicity. Por.L supplement could be considered as a potential coping strategy to alleviate hazardous effects in Cd-exposed humans.
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Affiliation(s)
- Xuena Tian
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China
| | - Yixin Ding
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China
| | - Yu Kong
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China
| | - Guangliang Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China
| | - Shuo Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China; Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, P. R. China
| | - Dai Cheng
- Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin, 300457, P. R. China; Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin 300071, P. R. China.
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30
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Hasani A, Ebrahimzadeh S, Hemmati F, Khabbaz A, Hasani A, Gholizadeh P. The role of Akkermansia muciniphila in obesity, diabetes and atherosclerosis. J Med Microbiol 2021; 70. [PMID: 34623232 DOI: 10.1099/jmm.0.001435] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Alteration in the composition of the gut microbiota can lead to a number of chronic clinical diseases. Akkermansia muciniphila is an anaerobic bacteria constituting 3-5% of the gut microbial community in healthy adults. This bacterium is responsible for degenerating mucin in the gut; its scarcity leads to diverse clinical disorders. In this review, we focus on the role of A. muciniphila in diabetes, obesity and atherosclerosis, as well as the use of this bacterium as a next-generation probiotic. In regard to obesity and diabetes, human and animal trials have shown that A. muciniphila controls the essential regulatory system of glucose and energy metabolism. However, the underlying mechanisms by which A. muciniphila alleviates the complications of obesity, diabetes and atherosclerosis are unclear. At the same time, its abundance suggests improved metabolic disorders, such as metabolic endotoxemia, adiposity insulin resistance and glucose tolerance. The role of A. muciniphila is implicated in declining aortic lesions and atherosclerosis. Well-characterized virulence factors, antigens and cell wall extracts of A. muciniphila may act as effector molecules in these diseases. These molecules may provide novel mechanisms and strategies by which this bacterium could be used as a probiotic for the treatment of obesity, diabetes and atherosclerosis.
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Affiliation(s)
- Alka Hasani
- Clinical Research Development Unit, Sina Educational, Research and Treatment Center, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saba Ebrahimzadeh
- Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
| | - Fatemeh Hemmati
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Aytak Khabbaz
- Clinical Research Development Unit, Sina Educational, Research and Treatment Center, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Akbar Hasani
- Department of Clinical Biochemistry and Laboratory Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Pourya Gholizadeh
- Department of Bacteriology and Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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31
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Gianos E, Jackson EA, Tejpal A, Aspry K, O'Keefe J, Aggarwal M, Jain A, Itchhaporia D, Williams K, Batts T, Allen KE, Yarber C, Ostfeld RJ, Miller M, Reddy K, Freeman AM, Fleisher KE. Oral health and atherosclerotic cardiovascular disease: A review. Am J Prev Cardiol 2021; 7:100179. [PMID: 34611631 PMCID: PMC8387275 DOI: 10.1016/j.ajpc.2021.100179] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Periodontal disease (PD) is common in the US and globally. Evidence suggests that poor oral health is associated with atherosclerotic cardiovascular disease (ASCVD); however, this relationship has not been a major focus in clinical cardiology. This manuscript will review the growing evidence linking PD to ASCVD, including pathophysiologic mechanisms and coexistent risk factors. Public health considerations with a focus on disparities, social determinants, preventive strategies, and a call to action to reduce the burden of coincident ASCVD and PD are also reviewed.
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Affiliation(s)
- Eugenia Gianos
- Division of Cardiology, Lenox Hill Hospital, Northwell Health, New York, NY, United States
| | - Elizabeth A Jackson
- Division of Cardiovascular Disease, Department of Internal Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Astha Tejpal
- Division of Cardiology, Lenox Hill Hospital, Northwell Health, New York, NY, United States
| | - Karen Aspry
- Lifespan Cardiovascular Institute, and Division of Cardiology, Brown University, Alpert Medical School, Providence, RI, United States
| | - James O'Keefe
- Saint Luke's Mid America Heart Institute and University of Missouri-Kansas City School of Medicine, Kansas City, MI, United States
| | - Monica Aggarwal
- Division of Cardiology, University of Florida, Gainesville, FL, United States
| | - Ankur Jain
- Division of Cardiology, University of Florida, Gainesville, FL, United States
| | - Dipti Itchhaporia
- Jeffrey M. Carlton Heart & Vascular Institute, Hoag Memorial Hospital, Newport Beach, CA, United States
| | - Kim Williams
- Department of Medicine, Division of Cardiology, Rush University Medical Center, Chicago, IL, United States
| | - Travis Batts
- Division of Cardiology, Department of Medicine, Wilford Hall Ambulatory Surgical Center, San Antonio, TX, United States
| | - Kathleen E Allen
- Geisel School of Medicine at Dartmouth, Hanover, NY, United States
| | - Clark Yarber
- Department of Internal Medicine, Montefiore Health System, Bronx, NY, United States
| | - Robert J Ostfeld
- Division of Cardiology, Department of Medicine, Montefiore Health System, Bronx, NY, United States
| | - Michael Miller
- Department of Cardiovascular Medicine, Epidemiology & Public Health, University of Maryland School of Medicine, Baltimore, MD, United States
| | - Koushik Reddy
- Division of Cardiology, James A. Haley VA Medical Center, University of South Florida, Tampa, FL, United States
| | - Andrew M Freeman
- Division of Cardiology, Department of Medicine, National Jewish Health, Denver, CO, United States
| | - Kenneth E Fleisher
- Department of Oral and Maxillofacial Surgery, NYU College of Dentistry, New York, NY, United States
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Cheng CK, Huang Y. The gut-cardiovascular connection: new era for cardiovascular therapy. MEDICAL REVIEW (BERLIN, GERMANY) 2021; 1:23-46. [PMID: 37724079 PMCID: PMC10388818 DOI: 10.1515/mr-2021-0002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 06/02/2021] [Indexed: 09/20/2023]
Abstract
Our gut microbiome is constituted by trillions of microorganisms including bacteria, archaea and eukaryotic microbes. Nowadays, gut microbiome has been gradually recognized as a new organ system that systemically and biochemically interact with the host. Accumulating evidence suggests that the imbalanced gut microbiome contributes to the dysregulation of immune system and the disruption of cardiovascular homeostasis. Specific microbiome profiles and altered intestinal permeability are often observed in the pathophysiology of cardiovascular diseases. Gut-derived metabolites, toxins, peptides and immune cell-derived cytokines play pivotal roles in the induction of inflammation and the pathogenesis of dysfunction of heart and vasculature. Impaired crosstalk between gut microbiome and multiple organ systems, such as gut-vascular, heart-gut, gut-liver and brain-gut axes, are associated with higher cardiovascular risks. Medications and strategies that restore healthy gut microbiome might therefore represent novel therapeutic options to lower the incidence of cardiovascular and metabolic disorders.
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Affiliation(s)
- Chak Kwong Cheng
- School of Biomedical Sciences and Li Ka Shing Institute of Health Science; The Chinese University of Hong Kong, Hong Kong SAR999077, China
- Heart and Vascular Institute and Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR999077, China
| | - Yu Huang
- School of Biomedical Sciences and Li Ka Shing Institute of Health Science; The Chinese University of Hong Kong, Hong Kong SAR999077, China
- Heart and Vascular Institute and Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR999077, China
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Luo SW, Xiong NX, Luo ZY, Luo KK, Liu SJ, Wu C, Wang S, Wen M. Effect of Lipopolysaccharide (LPS) stimulation on apoptotic process and oxidative stress in fibroblast cell of hybrid crucian carp compared with those of Carassius cuvieri and Carassius auratus red var. Comp Biochem Physiol C Toxicol Pharmacol 2021; 248:109085. [PMID: 34052412 DOI: 10.1016/j.cbpc.2021.109085] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 05/02/2021] [Accepted: 05/19/2021] [Indexed: 12/25/2022]
Abstract
Bacterial LPS is a heat-stable endotoxin and wall components of gram negative bacteria, which can exhibit a toxicological effect on physiology and biochemical activities of fish. In this study, we investigated the effect of LPS exposure on cell viability, oxidative stress, caspase activity and immune-related gene expressions in cultured fin cell lines of red crucian carp, white crucian carp and their hybrid offspring. LPS stimulation could reduce fish cell viability, whereas gene expression levels and promoter activities in inflammatory signals increased dramatically. Moreover, enhanced levels of intracellular oxidative stress and decreased levels of mitochondrial membrane potential (MMP) were observed in LPS-induced fish cells. N-Acetyl-L-cysteine (NAC) could alleviate LPS-stimulated reactive oxygen species (ROS) generation and caspase-3 activity in fish cells. These results suggested that ROS-mediated cytotoxic stress was involved in LPS-induced inflammation and mitochondrial damage in cultured fish cells.
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Affiliation(s)
- Sheng-Wei Luo
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China.
| | - Ning-Xia Xiong
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China
| | - Zi-Ye Luo
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China
| | - Kai-Kun Luo
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China
| | - Shao-Jun Liu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China.
| | - Chang Wu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China
| | - Shi Wang
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China
| | - Ming Wen
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha 410081, PR China
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Sumida K, Pierre JF, Han Z, Mims TS, Potukuchi PK, Yuzefpolskaya M, Colombo PC, Demmer RT, Datta S, Kovesdy CP. Circulating Microbial Signatures and Cardiovascular Death in Patients With ESRD. Kidney Int Rep 2021; 6:2617-2628. [PMID: 34622101 PMCID: PMC8484116 DOI: 10.1016/j.ekir.2021.07.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/09/2021] [Accepted: 07/19/2021] [Indexed: 02/06/2023] Open
Abstract
INTRODUCTION Patients with end-stage renal disease (ESRD) experience disproportionately high cardiovascular morbidity and mortality. Accumulating evidence suggests a role for the circulating microbiome in the pathogenesis of cardiovascular disease; however, little is known about its association with premature cardiovascular mortality in ESRD. METHODS In a pilot case-control study of 17 hemodialysis patients who died of a cardiovascular event and 17 matched hemodialysis controls who remained alive during a median follow-up of 2.0 years, we compared the levels and composition of circulating microbiome, including Bacteria, Archaea, and Fungi, in serum samples by quantitative polymerase chain reaction and 16S or Internal Transcribed Spacer (ITS) ribosomal RNA (rRNA) sequencing, respectively. Associations of the circulating cell-free microbial signatures with clinical parameters and cardiovascular death were examined using the Spearman rank correlation and multivariable conditional logistic regression, respectively. RESULTS Both 16S and ITS rRNA were detectable in all (except 3 for ITS) examined patients' serum samples. Despite no significant difference in 16S rRNA levels and α diversity between cases and controls, taxonomic analysis demonstrated differential community membership between groups, with significantly greater Actinobacteria and less Proteobacteria observed in cases than in controls at the phylum level. Proportions of Actinobacteria and Proteobacteria phyla were significantly correlated with plasma nuclear factor erythroid 2-related factor 2 (Nrf2) levels (rho = -0.41 and 0.42, P = 0.015 and 0.013, respectively) and marginally associated with risk of cardiovascular death (adjusted odds ratios [95% confidence intervals] = 1.12 [0.98-1.29] and 0.88 [0.76-1.02] for 1% increase, respectively). CONCLUSION Alterations of the circulating cell-free microbial signatures may be associated with higher premature cardiovascular mortality in ESRD.
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Affiliation(s)
- Keiichi Sumida
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Joseph F. Pierre
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Zhongji Han
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Tahliyah S. Mims
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Praveen Kumar Potukuchi
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Melana Yuzefpolskaya
- Division of Cardiology, Department of Medicine, New York Presbyterian Hospital, Columbia University, New York, New York, USA
| | - Paolo C. Colombo
- Division of Cardiology, Department of Medicine, New York Presbyterian Hospital, Columbia University, New York, New York, USA
| | - Ryan T. Demmer
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
- Division of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Susmita Datta
- Department of Biostatistics, University of Florida, Gainesville, Florida, USA
| | - Csaba P. Kovesdy
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, Tennessee, USA
- Nephrology Section, Memphis VA Medical Center, Memphis, Tennessee, USA
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Feng J, Jiang W, Cheng X, Zou B, Varley AW, Liu T, Qian G, Zeng W, Tang J, Zhao Q, Chu Y, Wei Y, Li X, Munford RS, Lu M. A host lipase prevents lipopolysaccharide-induced foam cell formation. iScience 2021; 24:103004. [PMID: 34522852 PMCID: PMC8426562 DOI: 10.1016/j.isci.2021.103004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/14/2021] [Accepted: 08/15/2021] [Indexed: 01/04/2023] Open
Abstract
Although microbe-associated molecular pattern (MAMP) molecules can promote cholesterol accumulation in macrophages, the existence of a host-derived MAMP inactivation mechanism that prevents foam cell formation has not been described. Here, we tested the ability of acyloxyacyl hydrolase (AOAH), the host lipase that inactivates gram-negative bacterial lipopolysaccharides (LPSs), to prevent foam cell formation in mice. Following exposure to small intraperitoneal dose(s) of LPSs, Aoah -/- macrophages produced more low-density lipoprotein receptor and less apolipoprotein E and accumulated more cholesterol than did Aoah +/+ macrophages. The Aoah -/- macrophages also maintained several pro-inflammatory features. Using a perivascular collar placement model, we found that Aoah -/- mice developed more carotid artery foam cells than did Aoah +/+ mice after they had been fed a high fat, high cholesterol diet, and received small doses of LPSs. This is the first demonstration that an enzyme that inactivates a stimulatory MAMP in vivo can reduce cholesterol accumulation and inflammation in arterial macrophages.
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Affiliation(s)
- Jintao Feng
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Wei Jiang
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200040, China
| | - Xiaofang Cheng
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Benkun Zou
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Alan W. Varley
- Department of Internal Medicine, UT-Southwestern Medical Center at Dallas, Texas 75390, USA
| | - Ting Liu
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Guojun Qian
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Wenjiao Zeng
- Department of Pathology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Jianguo Tang
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200040, China
| | - Qiang Zhao
- Department of Cardiac Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200020, China
| | - Yiwei Chu
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Yuanyuan Wei
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Xiaobo Li
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Robert S. Munford
- Antibacterial Host Defense Unit, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD 20892, USA
| | - Mingfang Lu
- Department of Immunology, Key Laboratory of Medical Molecular Virology (MOE, NHC, CAMS), School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People's Hospital, Fudan University, Shanghai 200040, China
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36
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Thomas C, Minty M, Vinel A, Canceill T, Loubières P, Burcelin R, Kaddech M, Blasco-Baque V, Laurencin-Dalicieux S. Oral Microbiota: A Major Player in the Diagnosis of Systemic Diseases. Diagnostics (Basel) 2021; 11:1376. [PMID: 34441309 PMCID: PMC8391932 DOI: 10.3390/diagnostics11081376] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 07/28/2021] [Accepted: 07/28/2021] [Indexed: 02/06/2023] Open
Abstract
The oral cavity is host to a complex and diverse microbiota community which plays an important role in health and disease. Major oral infections, i.e., caries and periodontal diseases, are both responsible for and induced by oral microbiota dysbiosis. This dysbiosis is known to have an impact on other chronic systemic diseases, whether triggering or aggravating them, making the oral microbiota a novel target in diagnosing, following, and treating systemic diseases. In this review, we summarize the major roles that oral microbiota can play in systemic disease development and aggravation and also how novel tools can help investigate this complex ecosystem. Finally, we describe new therapeutic approaches based on oral bacterial recolonization or host modulation therapies. Collaboration in diagnosis and treatment between oral specialists and general health specialists is of key importance in bridging oral and systemic health and disease and improving patients' wellbeing.
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Affiliation(s)
- Charlotte Thomas
- INSERM UMR 1297 Inserm, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Avenue Jean Poulhès 1, CEDEX 4, 31432 Toulouse, France; (A.V.); (P.L.); (R.B.); (V.B.-B.)
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
| | - Matthieu Minty
- INSERM UMR 1297 Inserm, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Avenue Jean Poulhès 1, CEDEX 4, 31432 Toulouse, France; (A.V.); (P.L.); (R.B.); (V.B.-B.)
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
| | - Alexia Vinel
- INSERM UMR 1297 Inserm, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Avenue Jean Poulhès 1, CEDEX 4, 31432 Toulouse, France; (A.V.); (P.L.); (R.B.); (V.B.-B.)
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
| | - Thibault Canceill
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
- UMR CNRS 5085, Centre Interuniversitaire de Recherche et d’Ingénierie des Matériaux (CIRIMAT), Université Paul Sabatier, 35 Chemin des Maraichers, CEDEX 9, 31062 Toulouse, France
| | - Pascale Loubières
- INSERM UMR 1297 Inserm, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Avenue Jean Poulhès 1, CEDEX 4, 31432 Toulouse, France; (A.V.); (P.L.); (R.B.); (V.B.-B.)
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
| | - Remy Burcelin
- INSERM UMR 1297 Inserm, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Avenue Jean Poulhès 1, CEDEX 4, 31432 Toulouse, France; (A.V.); (P.L.); (R.B.); (V.B.-B.)
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
| | - Myriam Kaddech
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
| | - Vincent Blasco-Baque
- INSERM UMR 1297 Inserm, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), Avenue Jean Poulhès 1, CEDEX 4, 31432 Toulouse, France; (A.V.); (P.L.); (R.B.); (V.B.-B.)
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
| | - Sara Laurencin-Dalicieux
- Faculté de Chirurgie Dentaire, Université Paul Sabatier III (UPS), 118 Route de Narbonne, CEDEX 9, 31062 Toulouse, France; (T.C.); (M.K.); (S.L.-D.)
- Service d’Odontologie Rangueil, CHU de Toulouse, 3 Chemin des Maraîchers, CEDEX 9, 31062 Toulouse, France
- INSERM UMR 1295, Centre d’Epidémiologie et de Recherche en Santé des Populations de Toulouse (CERPOP), Epidémiologie et Analyse en Santé Publique, Risques, Maladies Chroniques et Handicaps, 37 Allées Jules Guesdes, 31000 Toulouse, France
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Szabo Z, Koczka V, Marosvolgyi T, Szabo E, Frank E, Polyak E, Fekete K, Erdelyi A, Verzar Z, Figler M. Possible Biochemical Processes Underlying the Positive Health Effects of Plant-Based Diets-A Narrative Review. Nutrients 2021; 13:nu13082593. [PMID: 34444753 PMCID: PMC8398942 DOI: 10.3390/nu13082593] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/11/2022] Open
Abstract
Plant-based diets are becoming more popular for many reasons, and epidemiological as well as clinical data also suggest that a well-balanced vegan diet can be adopted for the prevention, and in some cases, in the treatment of many diseases. In this narrative review, we provide an overview of the relationships between these diets and various conditions and their potential biochemical background. As whole plant foods are very rich in food-derived antioxidants and other phytochemicals, they have many positive physiological effects on different aspects of health. In the background of the beneficial health effects, several biochemical processes could stand, including the reduced formation of trimethylamine oxide (TMAO) or decreased serum insulin-like growth factor 1 (IGF-1) levels and altered signaling pathways such as mechanistic target of rapamycin (mTOR). In addition, the composition of plant-based diets may play a role in preventing lipotoxicity, avoiding N-glycolylneuraminic acid (Neu5Gc), and reducing foodborne endotoxin intake. In this article, we attempt to draw attention to the growing knowledge about these diets and provide starting points for further research.
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Affiliation(s)
- Zoltan Szabo
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
- Correspondence: ; Tel.: +36-72-513-670; Fax: +36-72-513-671
| | - Viktor Koczka
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs, 7624 Pecs, Hungary; (V.K.); (E.S.)
- Doctoral School of Health Sciences, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary
| | - Tamas Marosvolgyi
- Institute of Bioanalysis, Medical School, University of Pecs, 7624 Pecs, Hungary;
- Szentagothai Research Center, University of Pecs, 7624 Pecs, Hungary
| | - Eva Szabo
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs, 7624 Pecs, Hungary; (V.K.); (E.S.)
| | - Eszter Frank
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Eva Polyak
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Kata Fekete
- Institute for Translational Medicine, Medical School, University of Pecs, 7624 Pecs, Hungary;
| | - Attila Erdelyi
- Institute of Health Insurance, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary;
| | - Zsofia Verzar
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
| | - Maria Figler
- Institute of Nutritional Sciences and Dietetics, Faculty of Health Sciences, University of Pecs, 7621 Pecs, Hungary; (E.F.); (E.P.); (Z.V.); (M.F.)
- 2nd Department of Internal Medicine and Nephrology Centre, Clinical Centre, University of Pecs, 7624 Pecs, Hungary
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38
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Roux-en-Y Gastric Bypass Improved Insulin Resistance via Alteration of the Human Gut Microbiome and Alleviation of Endotoxemia. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5554991. [PMID: 34337024 PMCID: PMC8294027 DOI: 10.1155/2021/5554991] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 04/30/2021] [Accepted: 06/06/2021] [Indexed: 12/25/2022]
Abstract
Background Obesity is a main contributing factor for the development of glucose intolerance and type 2 diabetes mellitus (T2D). Roux-en-Y gastric bypass (RYGB) is believed to be one of the most effective treatments to reduce body weight and improve glucose metabolism. In this study, we sought to explore the underlying mechanisms of weight reduction and insulin resistance improvement after RYGB. Methods This was a prospective observational study using consecutive samples of 14 obese subjects undergoing bariatric surgery. Main assessments were serum indexes (blood metabolites, glucose-lipid regulating hormones, trimethylamine-N-oxide (TMAO), and lipopolysaccharide-binding protein (LBP), fecal short-chain fatty acids (SCFAs), and gut microbiota. Correlation analysis of the factors changed by RYGB was used to indicate the potential mechanism by which surgery improves insulin resistance. Results The subjects showed significant improvement on indices of obesity and insulin resistance and a correlated change of gut microbiota components at 1 month, 3 months, and 6 months post-RYGB operation. In particular, the abundance of a counterobese strain, Akkemansia muciniphila, had gradually increased with the postoperative time. Moreover, these changes were negatively correlated to serum levels of LBP and positively correlated to serum TMAO and fecal SCFAs. Conclusions Our findings uncovered links between intestinal microbiota alterations, circulating endotoxemia, and insulin resistance. This suggests that the underlying mechanism of protection of the intestine by RYGB in obesity may be through changing the gut microbiota.
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Troke N, Logar‐Henderson C, DeBono N, Dakouo M, Hussain S, MacLeod JS, Demers PA. Incidence of acute myocardial infarction in the workforce: Findings from the Occupational Disease Surveillance System. Am J Ind Med 2021; 64:338-357. [PMID: 33682182 DOI: 10.1002/ajim.23241] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/30/2021] [Accepted: 02/15/2021] [Indexed: 01/24/2023]
Abstract
BACKGROUND Increased risks of acute myocardial infarction (AMI) may be attributable to the workplace, however, associations are not well-established. Using the Occupational Disease Surveillance System (ODSS), we sought to estimate associations between occupation and industry of employment and AMI risk among workers in Ontario, Canada. METHODS The study population was derived by linking provincial accepted lost-time workers' compensation claims data, to inpatient hospitalization records. Workers aged 15-65 years with an accepted non-AMI compensation claim were followed for an AMI event between 2007 and 2016. Adjusted Cox proportional hazard models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) for each industry and occupation group, compared to all other workers in the cohort. Sex-stratified analyses were also performed. RESULTS In all, 24,514 incident cases of AMI were identified among 1,502,072 Ontario workers. Increased incidence rates of AMI were found across forestry (HR 1.37, 95% CI 1.19-1.58) and wood processing (HR 1.50, 1.27-1.77) job-titles. Elevated rates were also detected within industries and occupations both broadly related to mining and quarrying (HR 1.52, 1.17-1.97), trucking (HR 1.32, 1.27-1.38), construction (HR 1.32, 1.14-1.54), and the manufacturing and processing of metal (HR 1.41, 1.19-1.68), textile (HR 1.41, 1.07-1.88), non-metallic mineral (HR 1.30, 0.82-2.07), and rubber and plastic (HR 1.42, 1.27-1.60) products. Female food service workers also had elevated AMI rates (HR 1.36, 1.23-1.51). CONCLUSION This study found occupational variation in AMI incidence. Future studies should examine work-related hazards possibly contributing to such excess risks, like noise, vibration, occupational physical activity, shift work, and chemical and particulate exposures.
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Affiliation(s)
- Natalie Troke
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
- Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
| | - Chloë Logar‐Henderson
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
| | - Nathan DeBono
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
- Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
| | - Mamadou Dakouo
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
| | - Selena Hussain
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
- Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
| | - Jill S. MacLeod
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
| | - Paul A. Demers
- Occupational Cancer Research Centre Ontario Health (Cancer Care Ontario Division) Toronto Ontario Canada
- Dalla Lana School of Public Health University of Toronto Toronto Ontario Canada
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Vitkov L, Muñoz LE, Knopf J, Schauer C, Oberthaler H, Minnich B, Hannig M, Herrmann M. Connection between Periodontitis-Induced Low-Grade Endotoxemia and Systemic Diseases: Neutrophils as Protagonists and Targets. Int J Mol Sci 2021; 22:4647. [PMID: 33925019 PMCID: PMC8125370 DOI: 10.3390/ijms22094647] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 12/11/2022] Open
Abstract
Periodontitis is considered a promoter of many systemic diseases, but the signaling pathways of this interconnection remain elusive. Recently, it became evident that certain microbial challenges promote a heightened response of myeloid cell populations to subsequent infections either with the same or other pathogens. This phenomenon involves changes in the cell epigenetic and transcription, and is referred to as ''trained immunity''. It acts via modulation of hematopoietic stem and progenitor cells (HSPCs). A main modulation driver is the sustained, persistent low-level transmission of lipopolysaccharide from the periodontal pocket into the peripheral blood. Subsequently, the neutrophil phenotype changes and neutrophils become hyper-responsive and prone to boosted formation of neutrophil extracellular traps (NET). Cytotoxic neutrophil proteases and histones are responsible for ulcer formations on the pocket epithelium, which foster bacteremia and endoxemia. The latter promote systemic low-grade inflammation (SLGI), a precondition for many systemic diseases and some of them, e.g., atherosclerosis, diabetes etc., can be triggered by SLGI alone. Either reverting the polarized neutrophils back to the homeostatic state or attenuation of neutrophil hyper-responsiveness in periodontitis might be an approach to diminish or even to prevent systemic diseases.
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Affiliation(s)
- Ljubomir Vitkov
- Vascular & Exercise Biology Unit, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria; (L.V.); (H.O.); (B.M.)
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, 66424 Homburg, Germany
| | - Luis E. Muñoz
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
| | - Jasmin Knopf
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
| | - Christine Schauer
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
| | - Hannah Oberthaler
- Vascular & Exercise Biology Unit, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria; (L.V.); (H.O.); (B.M.)
| | - Bernd Minnich
- Vascular & Exercise Biology Unit, Department of Biosciences, University of Salzburg, 5020 Salzburg, Austria; (L.V.); (H.O.); (B.M.)
| | - Matthias Hannig
- Clinic of Operative Dentistry, Periodontology and Preventive Dentistry, Saarland University, 66424 Homburg, Germany
| | - Martin Herrmann
- Department of Internal Medicine 3—Rheumatology and Immunology, Universitätsklinikum Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), 91052 Erlangen, Germany; (L.E.M.); (J.K.); (C.S.); (M.H.)
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Banaszewska B, Siakowska M, Chudzicka-Strugala I, Chang RJ, Pawelczyk L, Zwozdziak B, Spaczynski R, Duleba AJ. Elevation of markers of endotoxemia in women with polycystic ovary syndrome. Hum Reprod 2021; 35:2303-2311. [PMID: 32869098 DOI: 10.1093/humrep/deaa194] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/30/2020] [Indexed: 12/24/2022] Open
Abstract
STUDY QUESTION Is polycystic ovary syndrome (PCOS) associated with an elevation of markers of endotoxemia? SUMMARY ANSWER In women with PCOS serum levels of lipopolysaccharides (LPS), the LPS to high-density lipoprotein (HDL) ratio and LPS-binding protein (LBP) are significantly greater than those of normal control subjects. WHAT IS KNOWN ALREADY Mononuclear cells from women with PCOS respond excessively to LPS by releasing pro-inflammatory cytokines. In rat ovarian theca-interstitial cell cultures LPS stimulates androgen production. STUDY DESIGN, SIZE, DURATION Cross-sectional study comparing markers of endotoxemia in women with PCOS (n = 62), healthy ovulatory women with polycystic ovary morphology (PCOM, n = 39) and a control group of healthy ovulatory women without PCOM [normal (NL), n = 43]. PARTICIPANTS/MATERIALS, SETTING, METHODS LPS was measured using a chromogenic assay. LBP was measured by ELISA. Total cholesterol and lipids were measured using a homogeneous enzyme colorimetric method. Androgens, gonadotrophins, prolactin, insulin, high-sensitivity C-reactive protein (hs-CRP) and sex hormone-binding globulin were determined by electrochemiluminescence assays. Glucose was measured using an enzymatic reference method with hexokinase. MAIN RESULTS AND THE ROLE OF CHANCE Women with PCOS, when compared with NL subjects, had a significantly higher mean LPS (P = 0.045), LPS/HDL ratio (P = 0.007) and LBP (P = 0.01). Women with PCOM had intermediate levels of markers of endotoxemia. Comparison among all groups revealed that markers of endotoxemia correlated positively with testosterone level, ovarian volume, number of antral follicles and hirsutism score, but negatively with the number of spontaneous menses per year. In multiple regression analysis, all measures of endotoxemia correlated independently and positively with hs-CRP and with ovarian volume. LIMITATIONS, REASONS FOR CAUTION This cross-sectional study reveals that markers of endotoxemia are associated with several clinical features observed in women with PCOS. However, responsible mechanisms and causation remain unknown. Steroid quantification was carried out by electrochemiluminescence assays and not by the current gold standard: liquid chromatography-mass spectrometry. Hence, the relationship of endotoxemia with features of PCOS and the extent to which endotoxemia contributes to reproductive and metabolic dysfunction warrants further investigation. WIDER IMPLICATIONS OF THE FINDINGS This study reveals the novel observation that markers of endotoxemia are elevated in young and otherwise healthy women with PCOS without significant metabolic dysfunction. Moreover, the association of clinical and endocrine markers of PCOS with those of endotoxemia may represent a pathophysiologic link to reproductive dysfunction as well as metabolic and long-term cardiovascular risks associated with this disorder. STUDY FUNDING/COMPETING INTEREST(S) Intramural funding from Poznan University of Medical Sciences. The authors have no conflicts of interest to declare. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Beata Banaszewska
- Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | - Martyna Siakowska
- Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | | | - R Jeffrey Chang
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Diego, La Jolla, CA, USA
| | - Leszek Pawelczyk
- Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | - Barbara Zwozdziak
- Department of Medical Microbiology, Poznan University of Medical Sciences, Poznan, Poland
| | - Robert Spaczynski
- Department of Gynecology, Obstetrics and Gynecological Oncology, Poznan University of Medical Sciences, Poznan, Poland
| | - Antoni J Duleba
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California San Diego, La Jolla, CA, USA
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Kurilenko N, Fatkhullina AR, Mazitova A, Koltsova EK. Act Locally, Act Globally-Microbiota, Barriers, and Cytokines in Atherosclerosis. Cells 2021; 10:cells10020348. [PMID: 33562334 PMCID: PMC7915371 DOI: 10.3390/cells10020348] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 01/30/2021] [Accepted: 02/02/2021] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis is a lipid-driven chronic inflammatory disease that is characterized by the formation and progressive growth of atherosclerotic plaques in the wall of arteries. Atherosclerosis is a major predisposing factor for stroke and heart attack. Various immune-mediated mechanisms are implicated in the disease initiation and progression. Cytokines are key mediators of the crosstalk between innate and adaptive immune cells as well as non-hematopoietic cells in the aortic wall and are emerging players in the regulation of atherosclerosis. Progression of atherosclerosis is always associated with increased local and systemic levels of pro-inflammatory cytokines. The role of cytokines within atherosclerotic plaque has been extensively investigated; however, the cell-specific role of cytokine signaling, particularly the role of cytokines in the regulation of barrier tissues tightly associated with microbiota in the context of cardiovascular diseases has only recently come to light. Here, we summarize the knowledge about the function of cytokines at mucosal barriers and the interplay between cytokines, barriers, and microbiota and discuss their known and potential implications for atherosclerosis development.
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Affiliation(s)
- Natalia Kurilenko
- Department of Medicine and Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA; (N.K.); (A.M.)
| | | | - Aleksandra Mazitova
- Department of Medicine and Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA; (N.K.); (A.M.)
| | - Ekaterina K. Koltsova
- Department of Medicine and Department of Biomedical Sciences, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Los Angeles, CA 90048, USA; (N.K.); (A.M.)
- Correspondence:
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Zardawi F, Gul S, Abdulkareem A, Sha A, Yates J. Association Between Periodontal Disease and Atherosclerotic Cardiovascular Diseases: Revisited. Front Cardiovasc Med 2021; 7:625579. [PMID: 33521070 PMCID: PMC7843501 DOI: 10.3389/fcvm.2020.625579] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 12/17/2020] [Indexed: 01/15/2023] Open
Abstract
Atherosclerotic cardiovascular disease (ACVD) is an inflammatory disease of the coronary arteries associated with atheroma formation, which can cause disability and often death. Periodontitis is ranked as the sixth most prevalent disease affecting humans affecting 740 million people worldwide. In the last few decades, researchers have focused on the effect of periodontal disease (PD) on cardiovascular disease. The aim of this review was to investigate the association between these two diseases. PD is a potential risk factor that may initiate the development, maturation, and instability of atheroma in the arteries. Two mechanisms were proposed to explain such association, either periodontal pathogens directly invade bloodstream or indirectly by increasing systemic level of inflammatory mediators. Interestingly, it has been suggested that improvement in the condition of one disease positively impact the condition of the other one. Highlighting the association between these two diseases, the importance of early diagnosis and treatment of PD and its impact on cardiovascular status may be of great value in reducing the complications associated with ACVDs. Further in vitro and in vivo studies with longer follow up are necessary to confirm the causal relationship between PD and ACVDs.
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Affiliation(s)
- Faraedon Zardawi
- Periodontics Department, College of Dentistry, University of Sulaimani, Sulaymaniyah, Iraq
| | - Sarhang Gul
- Periodontics Department, College of Dentistry, University of Sulaimani, Sulaymaniyah, Iraq
| | - Ali Abdulkareem
- Department of Periodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Aram Sha
- Periodontics Department, College of Dentistry, University of Sulaimani, Sulaymaniyah, Iraq
| | - Julian Yates
- Division of Dentistry, School of Medical Sciences, University of Manchester, Manchester, United Kingdom
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So J, Wu D, Lichtenstein AH, Tai AK, Matthan NR, Maddipati KR, Lamon-Fava S. EPA and DHA differentially modulate monocyte inflammatory response in subjects with chronic inflammation in part via plasma specialized pro-resolving lipid mediators: A randomized, double-blind, crossover study. Atherosclerosis 2020; 316:90-98. [PMID: 33303222 DOI: 10.1016/j.atherosclerosis.2020.11.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/23/2020] [Accepted: 11/18/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIMS The independent effects of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on chronic inflammation through their downstream lipid mediators, including the specialized pro-resolving lipid mediators (SPM), remain unstudied. Therefore, we compared the effects of EPA and DHA supplementation on monocyte inflammatory response and plasma polyunsaturated fatty acids (PUFA) SPM lipidome. METHODS After a 4-week lead-in phase (baseline), 9 men and 12 postmenopausal women (50-75 years) with chronic inflammation received two phases of 10-week supplementation with 3 g/day EPA and DHA in a random order, separated by a 10-week washout. RESULTS Compared with baseline, EPA and DHA supplementation differently modulated LPS-stimulated monocyte cytokine expression. EPA lowered TNFA (p < 0.001) whereas DHA reduced TNFA (p < 0.001), IL6 (p < 0.02), MCP1 (p < 0.03), and IL10 (p < 0.01). DHA lowered IL10 expression relative to EPA (p = 0.03). Relative to baseline, EPA, but not DHA, decreased the ratios of TNFA/IL10 and MCP1/IL10 (both p < 0.01). EPA and DHA also significantly changed plasma PUFA SPM lipidome by replacing n-6 AA derivatives with their respective derivatives including 18-hydroxy-EPA (+5 fold by EPA) and 17- and 14-hydroxy-DHA (+3 folds by DHA). However, DHA showed a wider effect than EPA by also significantly increasing EPA derivatives and DPA-derived SPM at a greater expense of AA derivatives. Different groups of PUFA derivatives mediated the differential effects of EPA and DHA on monocyte cytokine expression. CONCLUSIONS EPA and DHA had distinct effects on monocyte inflammatory response with a broader effect of DHA in attenuating pro-inflammatory cytokines. These differential effects were potentially mediated by different groups of PUFA derivatives, suggesting immunomodulatory activities of SPM and their intermediates.
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Affiliation(s)
- Jisun So
- Cardiovascular Nutrition Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Dayong Wu
- Nutritional Immunology Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Alice H Lichtenstein
- Cardiovascular Nutrition Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Albert K Tai
- Department of Immunology, Tufts University School of Medicine, Boston, MA, USA
| | - Nirupa R Matthan
- Cardiovascular Nutrition Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
| | - Krishna Rao Maddipati
- Department of Pathology, Lipidomics Core Facility, Wayne State University, Detroit, MI, USA
| | - Stefania Lamon-Fava
- Cardiovascular Nutrition Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA.
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Study on the additive protective effect of PGLYRP3 and Bifidobacterium adolescentis Reuter 1963 on severity of DSS-induced colitis in Pglyrp3 knockout (Pglyrp3 -/-) and wild-type (WT) mice. Immunobiology 2020; 226:152028. [PMID: 33242664 DOI: 10.1016/j.imbio.2020.152028] [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: 07/17/2020] [Revised: 09/05/2020] [Accepted: 11/02/2020] [Indexed: 01/06/2023]
Abstract
BACKGROUND AND AIMS Pglyrp3 is a bactericidal innate immunity protein known to sustain the habitual gut microbiome and protect against experimental colitis. Intestinal inflammation and metaflammation are commonly associated with a marked reduction of commensal bifidobacteria. Whether Pglyrp3 and bifidobacteria interact synergistically or additively to alleviate metaflammation is unknown. We investigated the extent to which Pglyrp3 and bifidobacteria regulate metaflammation and gut bacterial dysbiosis in DSS-induced mouse models of intestinal inflammation. MATERIAL & METHODS 8-10 weeks old male mice were used. In both WT and Pglyrp3 -/- experiments, the mice were randomly divided into three groups of 16 mice per group: (1) a control group receiving sterile tap water, (2) an experimental group receiving sterile tap water supplemented with only 5% DSS, and (3) an experimental group receiving sterile tap water supplemented with 5% DSS and 1 × 109 CFU/ml of Bifidobacterium adolescentis (B.a.) for 7 days. Wild-type (WT) littermates of the respective gene (i.e. Pglyrp3) were used as controls throughout the study. Clinical signs of general health and inflammation were monitored daily. Faecal pellet samples were analysed by qRT-PCR for microbial composition. Histology of relevant organs was carried out on day 8. Metabolic parameters and liver inflammation were determined in serum samples. RESULTS Intestinal inflammation in mice of group 2 were significantly increased compared to those of control group 1. There was a significant difference in mean scores for inflammation severity between DSS-treated WT and DSS-treated Pglyrp3 -/- mice. Buildup of key serum metabolic markers (cholesterol, triglyceride and glucose) was set off by colonic inflammation. qRT-PCR quantification showed that DSS significantly decreased the Clostridium coccoides and Bifidobacterium cell counts while increasing those of Bacteroides group in both WT and Pglyrp3 -/- mice. These manifestations of DSS-induced dysbiosis were significantly attenuated by feeding B.a. Both the local and systemic ill-being of the mice alleviated when they received B.a. DISCUSSION This study shows that Pglyrp3 facilitates recognition of bifidobacterial cell wall-derived peptidoglycan, thus leading additively to a reduction of metaflammation through an increase in the number of bifidobacteria, which were able to mitigate intestinal immunopathology in the context of Pglyrp3 blockade.
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Ding L, Li LM, Hu B, Wang JL, Lu YB, Zhang RY, He X, Shi C, Wu LM, Wu CM, Yang B, Zheng L, Ping BH, Hu YW, Wang Q. TM4SF19 aggravates LPS-induced attenuation of vascular endothelial cell adherens junctions by suppressing VE-cadherin expression. Biochem Biophys Res Commun 2020; 533:1204-1211. [PMID: 33059922 DOI: 10.1016/j.bbrc.2020.08.078] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 12/30/2022]
Abstract
Atherosclerosis is a chronic vascular inflammatory disease that initially starts from an arterial intima lesion and endothelial barrier dysfunction. The purpose of this study was to investigate the role of TM4SF19, a recently identified member of the transmembrane 4L six superfamily, in vascular endothelial cell adherens junctions. We found TM4SF19 expression was significantly increased in atherosclerotic plaques and sera of patients with coronary heart disease (CHD) compared with healthy people by immunohistochemistry and ELISA. In vitro, human umbilical vein endothelial cells (HUVECs) were stimulated by lipopolysaccharides (LPS). TM4SF19 and VE-cadherin expression as well as cell adherens junctions were assessed. Additionally, LPS could upregulate TM4SF19 expression and downregulate VE-cadherin expression in HUVECs in a concentration dependent manner. Overexpression of TM4SF19 substantially aggravated LPS-induced reduction of VE-cadherin expression and attenuation of vascular endothelial cell adherens junctions. However, both the decreased VE-cadherin expression and weakened cell adherens junctions induced by LPS could be dramatically reversed when the expression of TM4SF19 was depressed. This study is the first to reveal the effect of TM4SF19 on endothelial cell adherens junctions. Meanwhile, our results also provide novel therapeutic strategies for atherosclerotic diseases.
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Affiliation(s)
- Li Ding
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Li-Min Li
- Laboratory Medicine Center, Zhujiang Hospital, Southern Medical University, Guangzhou, 510515, China; Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Bing Hu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jia-Li Wang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yuan-Bin Lu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ru-Yi Zhang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xin He
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Chao Shi
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Li-Mei Wu
- Department of Clinical Laboratory, Guangzhou Twelfth People's Hospital, Guangzhou, 510620, China
| | - Chang-Meng Wu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Biao Yang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Lei Zheng
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Bao-Hong Ping
- Department of Hui Qiao, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yan-Wei Hu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Qian Wang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China; Laboratory Medicine Center, Zhujiang Hospital, Southern Medical University, Guangzhou, 510515, China.
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Rahtes A, Li L. Polarization of Low-Grade Inflammatory Monocytes Through TRAM-Mediated Up-Regulation of Keap1 by Super-Low Dose Endotoxin. Front Immunol 2020; 11:1478. [PMID: 32765513 PMCID: PMC7378438 DOI: 10.3389/fimmu.2020.01478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/08/2020] [Indexed: 12/19/2022] Open
Abstract
Subclinical endotoxemia [low levels of bacterial endotoxin (LPS) in the blood stream] has been correlated with chronic inflammatory diseases, with less-understood mechanisms. We have previously shown that chronic exposure to super low doses of LPS polarizes monocytes/macrophages to a pro-inflammatory state characterized by up-regulation of pro-inflammatory regulators such as p62 and simultaneous down-regulation of anti-inflammatory/resolving regulators such as Nrf2. Building upon this observation, here we show that chronic exposure to super-low doses of LPS leads to accumulation of the Nrf2-inhibitory protein Keap1 in murine monocytes. This is accompanied by increases of p62 and MLKL, consistent with a disruption of autolysosome function in polarized monocytes challenged by super-low dose LPS. Monocytes subjected to persistent super-low dose LPS challenge also accumulate higher levels of IKKβ. As a consequence, SLD-LPS challenge leads to an inflammatory monocyte state represented by higher expression of the inflammatory marker Ly6C as well as lower expression of the anti-inflammatory marker CD200R. Further analysis revealed that Keap1 levels are significantly enriched in the Ly6Chi pro-inflammatory monocyte population. Finally, we show that the TLR4 signaling adaptor TRAM is essential for these effects. Together our study provides novel insight into signaling mechanisms behind low-grade inflammatory monocyte polarization unique to chronic super-low dose LPS exposure.
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Affiliation(s)
- Allison Rahtes
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Liwu Li
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, United States
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Hassan MO, Dix-Peek T, Duarte R, Dickens C, Naidoo S, Vachiat A, Grinter S, Manga P, Naicker S. Association of chronic inflammation and accelerated atherosclerosis among an indigenous black population with chronic kidney disease. PLoS One 2020; 15:e0232741. [PMID: 32649699 PMCID: PMC7351182 DOI: 10.1371/journal.pone.0232741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 04/03/2020] [Indexed: 12/20/2022] Open
Abstract
Introduction Inflammation plays a major role in the development of atherosclerosis and cardiovascular morbidity and mortality in chronic kidney disease (CKD) patients. Toll-like receptor-4 (TLR4) is a major receptor for lipopolysaccharides (endotoxin) and other ligands involved in the pathogenesis of inflammation. We determined whether endotoxin levels and the presence of TLR4 polymorphisms are associated with markers of inflammation and atherosclerosis among South African CKD patients. Materials and methods Endotoxin, lipopolysaccharide binding protein (LBP), serum CD14 (sCD14), interleukin-8 (IL-8), monocyte chemoattractant protein-1 (MCP-1) and carotid intima media thickness (CIMT) were measured in 160 participants (120 CKD patients and 40 controls). Associations between endotoxins and CIMT in the presence of sCD14, IL-8 and MCP-1, were assessed using odds ratios. Participants were screened for the presence of Asp299Gly and Thr399Ile TLR4 polymorphisms, and CIMT and inflammatory markers were compared between subjects with and without TLR4 polymorphisms. Results Endotoxin levels correlated with sCD14 (r = 0.441, p<0.001) and MCP-1 (r = 0.388, p<0.001) levels while increased CIMT was associated with MCP-1 (r = 0.448, p<0.001), sCD14 levels (r = 0.476, p<0.001), LBP (r = 0.340, p<0.001), and IL-8 (r = 0.395, p<0.001). Atherosclerosis was associated with endotoxin levels (odds ratio: 4.95; 95% confidence interval: 2.52–9.73; p<0.001), and was predicted by higher serum levels of inflammatory markers. Analysis of patients with TLR4 polymorphisms showed reduced serum levels of inflammatory markers and CIMT values compared with the patients carrying the wild type TLR4 alleles. Conclusion The study demonstrated associations between circulating endotoxaemia, systemic inflammation and accelerated atherosclerosis among South African CKD patients, and showed that the atherogenic predictive power of endotoxaemia was significantly increased by the presence of elevated levels of inflammatory markers. Additional findings, which must be confirmed, suggest that TLR4 polymorphisms are associated with low levels of inflammatory markers and CIMT values.
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Affiliation(s)
- Muzamil Olamide Hassan
- Divisions of Nephrology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
- * E-mail:
| | - Therese Dix-Peek
- Internal Medicine Research Laboratory, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Raquel Duarte
- Internal Medicine Research Laboratory, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Caroline Dickens
- Internal Medicine Research Laboratory, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Sagren Naidoo
- Divisions of Nephrology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Ahmed Vachiat
- Division of Cardiology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Sacha Grinter
- Division of Cardiology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Pravin Manga
- Division of Cardiology, Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Saraladevi Naicker
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
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Laugerette F, Vors C, Alligier M, Pineau G, Drai J, Knibbe C, Morio B, Lambert-Porcheron S, Laville M, Vidal H, Michalski MC. Postprandial Endotoxin Transporters LBP and sCD14 Differ in Obese vs. Overweight and Normal Weight Men during Fat-Rich Meal Digestion. Nutrients 2020; 12:nu12061820. [PMID: 32570947 PMCID: PMC7353369 DOI: 10.3390/nu12061820] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 02/06/2023] Open
Abstract
Circulating levels of lipopolysaccharide-binding protein (LBP) and soluble cluster of differentiation 14 (sCD14) are recognized as clinical markers of endotoxemia. In obese men, postprandial endotoxemia is modulated by the amount of fat ingested, being higher compared to normal-weight (NW) subjects. Relative variations of LBP/sCD14 ratio in response to overfeeding are also considered important in the inflammation set-up, as measured through IL-6 concentration. We tested the hypothesis that postprandial LBP and sCD14 circulating concentrations differed in obese vs. overweight and NW men after a fat-rich meal. We thus analyzed the postprandial kinetics of LBP and sCD14 in the context of two clinical trials involving postprandial tests in normal-, over-weight and obese men. In the first clinical trial eight NW and 8 obese men ingested breakfasts containing 10 vs. 40 g of fat. In the second clinical trial, 18 healthy men were overfed during 8 weeks. sCD14, LBP and Il-6 were measured in all subjects during 5 h after test meal. Obese men presented a higher fasting and postprandial LBP concentration in plasma than NW men regardless of fat load, while postprandial sCD14 was similar in both groups. Irrespective of the overfeeding treatment, we observed postprandial increase of sCD14 and decrease of LBP before and after OF. In obese individuals receiving a 10 g fat load, whereas IL-6 increased 5h after meal, LBP and sCD14 did not increase. No direct association between the postprandial kinetics of endotoxemia markers sCD14 and LBP and of inflammation in obese men was observed in this study.
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Affiliation(s)
- Fabienne Laugerette
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Correspondence: ; Tel.: +33-4-26-23-61-74
| | - Cécile Vors
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
| | - Maud Alligier
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Centre de Recherche en Nutrition Humaine Rhône-Alpes, Univ-Lyon, CarMeN Laboratory, Université Claude Bernard Lyon1, Hospices Civils de Lyon, CENS, FCRIN/FORCE Network, 69310 Pierre-Bénite, France;
| | - Gaëlle Pineau
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
| | - Jocelyne Drai
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Laboratoire de Biochimie, Centre Hospitalier Lyon Sud, 69600 Oullins, France
| | - Carole Knibbe
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
| | - Béatrice Morio
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Centre de Recherche en Nutrition Humaine Rhône-Alpes, Univ-Lyon, CarMeN Laboratory, Université Claude Bernard Lyon1, Hospices Civils de Lyon, CENS, FCRIN/FORCE Network, 69310 Pierre-Bénite, France;
| | - Stéphanie Lambert-Porcheron
- Centre de Recherche en Nutrition Humaine Rhône-Alpes, Univ-Lyon, CarMeN Laboratory, Université Claude Bernard Lyon1, Hospices Civils de Lyon, CENS, FCRIN/FORCE Network, 69310 Pierre-Bénite, France;
- Hospices Civils de Lyon, 69000 Lyon, France
| | - Martine Laville
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Centre de Recherche en Nutrition Humaine Rhône-Alpes, Univ-Lyon, CarMeN Laboratory, Université Claude Bernard Lyon1, Hospices Civils de Lyon, CENS, FCRIN/FORCE Network, 69310 Pierre-Bénite, France;
- Hospices Civils de Lyon, 69000 Lyon, France
| | - Hubert Vidal
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Centre de Recherche en Nutrition Humaine Rhône-Alpes, Univ-Lyon, CarMeN Laboratory, Université Claude Bernard Lyon1, Hospices Civils de Lyon, CENS, FCRIN/FORCE Network, 69310 Pierre-Bénite, France;
- Hospices Civils de Lyon, 69000 Lyon, France
| | - Marie-Caroline Michalski
- Univ Lyon, CarMeN Laboratory, INRAE, UMR1397, INSERM, UMR1060, Université Claude Bernard Lyon 1, 69310 Pierre Bénite, France; (C.V.); (M.A.); (G.P.); (J.D.); (C.K.); (B.M.); (M.L.); (H.V.); (M.-C.M.)
- Centre de Recherche en Nutrition Humaine Rhône-Alpes, Univ-Lyon, CarMeN Laboratory, Université Claude Bernard Lyon1, Hospices Civils de Lyon, CENS, FCRIN/FORCE Network, 69310 Pierre-Bénite, France;
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Hassan MO, Duarte R, Dickens C, Dix-Peek T, Naidoo S, Vachiat A, Grinter S, Manga P, Naicker S. APOL1 Genetic Variants Are Associated with Serum-Oxidized Low-Density Lipoprotein Levels and Subclinical Atherosclerosis in South African CKD Patients. Nephron Clin Pract 2020; 144:331-340. [PMID: 32526749 DOI: 10.1159/000507860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 04/13/2020] [Indexed: 02/15/2024] Open
Abstract
INTRODUCTION Apolipoprotein L1 (APOL1) plays an important role in cholesterol metabolism and attenuation of low-density lipoprotein (LDL) oxidation. While protecting against Trypanosoma brucei rhodesiense infection, APOL1 risk alleles confer greater risk for CKD and cardiovascular disease among patients of African descent. OBJECTIVES We investigated whether APOL1 risk variants are associated with atherosclerosis and oxidized LDL (OxLDL) levels among black South African CKD patients. METHODS A cross-sectional study of 120 adult CKD patients and 40 controls was undertaken. DNA samples of participants were genotyped for APOL1 G1 and G2 variants. High-sensitivity C-reactive protein, serum lipids, and OxLDL levels were measured, and carotid doppler ultrasonography was performed on all participants. RESULTS APOL1 alleles rs73885319, rs60910145, and rs71785313 had minor allele frequencies of 9.2, 8.8, and 17.5%, respectively, in the patients, and 8.8, 8.8, and 13.8%, respectively, in the controls. Of the 9 patients with 2 APOL1 risk alleles, 77.8% were compound G1/G2 heterozygotes and 22.2% were G2 homozygotes. Carriers of at least 1 APOL1 risk allele had a 3-fold increased risk of subclinical atherosclerosis (odds ratio 3.19; 95% confidence interval: 1.64-6.19; p = 0.01) compared to individuals with no risk alleles. Patients with 1 or 2 APOL1 risk alleles showed a significant increase in OxLDL levels when compared with those without the APOL1 risk allele. CONCLUSION These findings suggest an increased risk for atherosclerosis in carriers of a single APOL1 risk variant, and the presence of APOL1 risk variants was associated with increased serum OxLDL levels in black South African CKD patients.
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Affiliation(s)
- Muzamil Olamide Hassan
- Divisions of Nephrology, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa,
| | - Raquel Duarte
- Internal Medicine Research Laboratory, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Caroline Dickens
- Internal Medicine Research Laboratory, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Therese Dix-Peek
- Internal Medicine Research Laboratory, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Sagren Naidoo
- Divisions of Nephrology, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Ahmed Vachiat
- Division of Cardiology, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Sacha Grinter
- Division of Cardiology, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Pravin Manga
- Division of Cardiology, Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
| | - Saraladevi Naicker
- Department of Internal Medicine, University of the Witwatersrand, Johannesburg, South Africa
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