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Yuan HX, Feng XE, Liu EL, Ge R, Zhang YL, Xiao BG, Li QS. 5,2'-dibromo-2,4',5'-trihydroxydiphenylmethanone attenuates LPS-induced inflammation and ROS production in EA.hy926 cells via HMBOX1 induction. J Cell Mol Med 2018; 23:453-463. [PMID: 30358079 PMCID: PMC6307801 DOI: 10.1111/jcmm.13948] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 08/31/2018] [Accepted: 09/10/2018] [Indexed: 12/16/2022] Open
Abstract
Inflammation and reactive oxygen species (ROS) are important factors in the pathogenesis of atherosclerosis (AS). 5,2′‐dibromo‐2,4′,5′‐trihydroxydiphenylmethanone (TDD), possess anti‐atherogenic properties; however, its underlying mechanism of action remains unclear. Therefore, we sought to understand the therapeutic molecular mechanism of TDD in inflammatory response and oxidative stress in EA.hy926 cells. Microarray analysis revealed that the expression of homeobox containing 1 (HMBOX1) was dramatically upregulated in TDD‐treated EA.hy926 cells. According to the gene ontology (GO) analysis of microarray data, TDD significantly influenced the response to lipopolysaccharide (LPS); it suppressed the LPS‐induced adhesion of monocytes to EA.hy926 cells. Simultaneously, TDD dose‐dependently inhibited the production or expression of IL‐6, IL‐1β, MCP‐1, TNF‐α, VCAM‐1, ICAM‐1 and E‐selectin as well as ROS in LPS‐stimulated EA.hy926 cells. HMBOX1 knockdown using RNA interference attenuated the anti‐inflammatory and anti‐oxidative effects of TDD. Furthermore, TDD inhibited LPS‐induced NF‐κB and MAPK activation in EA.hy926 cells, but this effect was abolished by HMBOX1 knockdown. Overall, these results demonstrate that TDD activates HMBOX1, which is an inducible protective mechanism that inhibits LPS‐induced inflammation and ROS production in EA.hy926 cells by the subsequent inhibition of redox‐sensitive NF‐κB and MAPK activation. Our study suggested that TDD may be a potential novel agent for treating endothelial cells dysfunction in AS.
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Affiliation(s)
- Hong-Xia Yuan
- School of Public Health Science & Pharmaceutical Science, Shanxi Medical University, Taiyuan, China.,Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation, Shanxi University of Chinese medicine, Taiyuan, China
| | - Xiu-E Feng
- School of Public Health Science & Pharmaceutical Science, Shanxi Medical University, Taiyuan, China
| | - En-Li Liu
- School of Public Health Science & Pharmaceutical Science, Shanxi Medical University, Taiyuan, China
| | - Rui Ge
- School of Public Health Science & Pharmaceutical Science, Shanxi Medical University, Taiyuan, China
| | - Yuan-Lin Zhang
- School of Public Health Science & Pharmaceutical Science, Shanxi Medical University, Taiyuan, China
| | - Bao-Guo Xiao
- Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation, Shanxi University of Chinese medicine, Taiyuan, China
| | - Qing-Shan Li
- School of Public Health Science & Pharmaceutical Science, Shanxi Medical University, Taiyuan, China.,Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation, Shanxi University of Chinese medicine, Taiyuan, China
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Abstract
Established cardiovascular risk factors do not fully explain the variations in the prevalence and severity of coronary heart disease. Recent evidence suggests that common chronic infections may contribute, either by direct or indirect mechanisms, to the etiology and/or progression of coronary atherosclerosis. Of the candidate infectious agents implicated, Chlamydia pneumoniae has emerged as the most likely pathogen to have a causal role. Evidence for this is based on seroepidemiologic, pathologic, and laboratory-based evidence, in addition to recent small-scale antibiotic intervention studies. Concerted efforts are now focused on the design of large prospective trials with antibiotics active against C. pneumoniae in the secondary prevention of coronary heart disease.
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Affiliation(s)
- S Gupta
- Department of Cardiological Sciences, St George's Hospital Medical School, London, U.K
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3
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Abstract
UNLABELLED Although clinical manifestations of atherosclerotic coronary heart disease occur in adult life, the initial stages of its development commence in childhood. Therefore, elucidating the pathogenesis of early atherosclerosis and identifying the network of risk factors have become fundamental priorities for both cardiovascular healthcare providers and scientists. There is mounting evidence from both human studies and animal experiments that infectious pathogens could be implicated in atherosclerosis development. The vulnerability of the arterial wall to the adverse effects of infection is probably augmented when additional risk factors and/or certain proatherogenic genetic profiles are also present. The precise mechanisms whereby infection, alone or in synergy with conventional cardiovascular risk factors, could contribute to atherosclerosis are not fully understood. CONCLUSION Injury to the vascular endothelium, which could be elicited by infection through inflammatory, metabolic, autoimmune, and pathogen-related mechanisms, might be a central link between infection and early atherosclerosis.
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Affiliation(s)
- Petru Liuba
- Division of Paediatric Cardiology, Children's Hospital, University Hospital Lund, Lund, Sweden.
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Liuba P. Arterial endothelial injury due to infection in childhood: ticking bomb or innocent bystander? Acta Paediatr 2004; 93:55-62. [PMID: 15702671 DOI: 10.1111/j.1651-2227.2004.tb00240.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Atherosclerosis is regarded as a chronic disease that begins in early life. While the main underlying mechanism of atherosclerosis is nowadays unequivocally attributed to a low-grade inflammatory reaction, the spectrum of aetiological conditions is far from being fully elucidated. Both viruses and bacteria have been suggested to intervene at various stages of atherosclerosis development, although a clear pathogenic link between infection and atherosclerosis remains debatable. As one key event in atherogenesis involves a perturbation of the protective mechanisms normally posed by the arterial endothelium, a number of studies have enquired into the possible detrimental effects of microbes and their components on the endothelial cells. This review aims to scrutinize the current literature in this regard, and to suggest several possible directions for future studies.
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Affiliation(s)
- P Liuba
- Division of Paediatric Cardiology, University Hospital Lund, Lund, Sweden.
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Brault S, Martinez-Bermudez AK, Marrache AM, Gobeil F, Hou X, Beauchamp M, Quiniou C, Almazan G, Lachance C, Roberts J, Varma DR, Chemtob S. Selective neuromicrovascular endothelial cell death by 8-Iso-prostaglandin F2alpha: possible role in ischemic brain injury. Stroke 2003; 34:776-82. [PMID: 12624307 DOI: 10.1161/01.str.0000055763.76479.e6] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Free radical-induced peroxidation is an important factor in the genesis of hypoxic-ischemic encephalopathy, including that of the preterm infant. Isoprostanes are major peroxidation products. Since microvascular dysfunction seems to contribute to ischemic encephalopathies, we studied the cytotoxicity of 8-iso-prostaglandin F2alpha (PGF2alpha) on cerebral microvascular cells. METHODS Microvascular endothelial, astroglial, and smooth muscle cells from newborn brain were cultured. The cytotoxicity of 8-iso-PGF2alpha on these cells was determined by MTT assays and lactate dehydrogenase (LDH) release, propidium iodide incorporation, and DNA fragmentation (terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling [TUNEL]). In addition, effects of intraventricular injections of 8-iso-PGF2alpha and possible involvement of thromboxane in 8-iso-PGF2alpha-induced cytotoxicity were determined. RESULTS 8-Iso-PGF2alpha induced time- and concentration-dependent endothelial cell death (EC50=0.1 nmol/L) but exerted little effect on smooth muscle and astroglial cells; endothelial cell death seemed mostly of oncotic nature (propidium iodide incorporation and LDH release). Cell death was associated with increased endothelial thromboxane A2 (TXA2) formation and was prevented by TXA2 synthase inhibitors (CGS12970 and U63557A); TXA2 mimetics U46619 and I-BOP also caused endothelial cell death. Intraventricular injection of 8-iso-PGF2alpha induced periventricular damage, which was attenuated by CGS12970 pretreatment. CONCLUSIONS These data disclose a novel action of 8-iso-PGF2alpha involving TXA2 in oxidant stress-induced cerebral microvascular injury and brain damage.
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MESH Headings
- Animals
- Astrocytes/cytology
- Astrocytes/drug effects
- Astrocytes/metabolism
- Brain/blood supply
- Brain/drug effects
- Brain/pathology
- Brain Ischemia/metabolism
- Cell Death/drug effects
- Cell Survival/drug effects
- Cells, Cultured
- DNA Fragmentation/drug effects
- Dinoprost/analogs & derivatives
- Dinoprostone/analogs & derivatives
- Dinoprostone/pharmacology
- Dose-Response Relationship, Drug
- Endothelium, Vascular/cytology
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Enzyme Inhibitors/pharmacology
- F2-Isoprostanes/pharmacology
- In Vitro Techniques
- Injections, Intraventricular
- Isoprostanes/pharmacology
- L-Lactate Dehydrogenase/metabolism
- Microcirculation/cytology
- Microcirculation/drug effects
- Microcirculation/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Necrosis
- Rats
- Rats, Sprague-Dawley
- Swine
- Thromboxane A2/metabolism
- Thromboxane-A Synthase/antagonists & inhibitors
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Affiliation(s)
- Sonia Brault
- Centre de Recherche de l'Hôpital Sainte-Justine, Department of Pediatrics and Pharmacology, Université de Montréal, Montréal, Québec, Canada
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6
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Abstract
Recently, it has been recognized that oral infection, especially periodontitis, may affect the course and pathogenesis of a number of systemic diseases, such as cardiovascular disease, bacterial pneumonia, diabetes mellitus, and low birth weight. The purpose of this review is to evaluate the current status of oral infections, especially periodontitis, as a causal factor for systemic diseases. Three mechanisms or pathways linking oral infections to secondary systemic effects have been proposed: (i) metastatic spread of infection from the oral cavity as a result of transient bacteremia, (ii) metastatic injury from the effects of circulating oral microbial toxins, and (iii) metastatic inflammation caused by immunological injury induced by oral microorganisms. Periodontitis as a major oral infection may affect the host's susceptibility to systemic disease in three ways: by shared risk factors; subgingival biofilms acting as reservoirs of gram-negative bacteria; and the periodontium acting as a reservoir of inflammatory mediators. Proposed evidence and mechanisms of the above odontogenic systemic diseases are given.
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Li X, Kolltveit KM, Tronstad L, Olsen I. Systemic diseases caused by oral infection. Clin Microbiol Rev 2000; 13:547-58. [PMID: 11023956 PMCID: PMC88948 DOI: 10.1128/cmr.13.4.547] [Citation(s) in RCA: 449] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Recently, it has been recognized that oral infection, especially periodontitis, may affect the course and pathogenesis of a number of systemic diseases, such as cardiovascular disease, bacterial pneumonia, diabetes mellitus, and low birth weight. The purpose of this review is to evaluate the current status of oral infections, especially periodontitis, as a causal factor for systemic diseases. Three mechanisms or pathways linking oral infections to secondary systemic effects have been proposed: (i) metastatic spread of infection from the oral cavity as a result of transient bacteremia, (ii) metastatic injury from the effects of circulating oral microbial toxins, and (iii) metastatic inflammation caused by immunological injury induced by oral microorganisms. Periodontitis as a major oral infection may affect the host's susceptibility to systemic disease in three ways: by shared risk factors; subgingival biofilms acting as reservoirs of gram-negative bacteria; and the periodontium acting as a reservoir of inflammatory mediators. Proposed evidence and mechanisms of the above odontogenic systemic diseases are given.
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Affiliation(s)
- X Li
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway.
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8
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Felton JM, Mabey DC. Chlamydia pneumoniae-reactive T lymphocytes in abdominal aortic aneurysms: the smoking gun? Eur J Clin Invest 1999; 29:462-5. [PMID: 10354205 DOI: 10.1046/j.1365-2362.1999.00504.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- J M Felton
- London School of Hygiene & Tropical Medicine, London, UK
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9
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Kinane DF. Periodontal diseases' contributions to cardiovascular disease: an overview of potential mechanisms. ANNALS OF PERIODONTOLOGY 1998; 3:142-50. [PMID: 9722698 DOI: 10.1902/annals.1998.3.1.142] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Periodontitis and atherosclerosis have complex etiologies, genetic and gender predispositions, and potentially share many risk factors-the most significant of which may be smoking status. These diseases also have many pathogenic mechanisms in common. It is becoming increasingly clear that infections and chronic inflammatory conditions such as periodontitis may influence the atherosclerotic process. The severity and chronicity of periodontal disease provides a rich source of subgingival microbial and host response products and effects over a long time period. The objective of this review is to consider the mechanisms whereby diseases such as periodontitis, which is chronic and Inflammatory In nature and initiated by microbial plaque, can predispose to atherosclerosis. In common with periodontal disease. the pathogenesis of atherosclerosis is not completely understood and both diseases are currently under Intensive investigation. Two main processes in particular are worthy of consideration and may provide the link between these 2 diseases, namely the lipopolysaccharide-related responses and the hyperresponsive monocyte phenomenon. Insufficient experimental evidence exists, however, to further support these hypotheses at present and clearly more research is needed on both of these processes and the interrelationships between both diseases.
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Affiliation(s)
- D F Kinane
- Periodontal Department, Glasgow Dental School, Scotland
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10
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Abstract
A growing amount of clinical and experimental evidence suggests a link between infection and atherosclerotic diseases including both myocardial and cerebral infarction. A prime example is a greatly increased risk of stroke in septicaemic patients with and without endocarditis. Controlled clinical studies have recently shown, however, that certain other milder bacterial infections are also a risk factor for infarction. A preceding febrile respiratory infection was a major risk factor for stroke in young and middle aged patients. In patients with acute myocardial infarction Chlamydia pneumoniae and dental infections seem to be risk factors according to one controlled clinical study. Several possible mechanisms could explain the observed association of infection and infarction. For instance, infection causes a hypercoagulable state which increases the risk of thrombosis. In addition, infection has profound and harmful effects on prostaglandin and lipid metabolism. Infection may also have some role in the atherosclerotic process itself by inducing damage and inflammation in vascular endothelium in the presence of hypercholesterolemia. So far, however, little clinical evidence is available to suggest that by controlling infection the risk of infarction or development of atherosclerotic lesions might be reduced except in patients with endocarditis, where the risk of thromboembolic complications rapidly diminished when the infection is controlled with antimicrobial therapy.
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Affiliation(s)
- V V Valtonen
- Second Department of Medicine, Helsinki University Central Hospital, Finland
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11
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Mattila K, Rasi V, Nieminen M, Valtonen V, Kesäniemi A, Syrjälä S, Jungell P, Huttunen JK. von Willebrand factor antigen and dental infections. Thromb Res 1989; 56:325-9. [PMID: 2617473 DOI: 10.1016/0049-3848(89)90174-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- K Mattila
- First Department of Medicine, Helsinki University Central Hospital, Finland
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12
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van Heuven-Nolsen D, Ten Have GA, Nijkamp FP. Increased reactivity to histamine in the coronary vascular system of the guinea-pig after endotoxin. AGENTS AND ACTIONS 1989; 27:158-9. [PMID: 2750587 DOI: 10.1007/bf02222226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Histamine produced a dose-dependent increase in heart rate, myocardial contractility and coronary flow in the isolated guinea-pig heart using a modified Langendorff procedure. Intraperitoneal treatment of the guinea pigs with E. coli endotoxin, 4 days prior to the experiment, enhanced the positive chronotropic and flow-increasing effect of histamine. The increased response to histamine appeared to be H1-receptor mediated, the positive chronotropic response is attributed to H2-receptors. These results indicate that bacterial endotoxin increases the reactivity of the coronary vascular system of the guinea-pig to histamine.
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Affiliation(s)
- D van Heuven-Nolsen
- Department of Veterinary Pharmacology, University of Utrecht, The Netherlands
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13
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Ylä-Herttuala S, Pesonen E, Kaprio E, Rapola J, Soveri T, Viikari J, Savilahti E, Oksanen H, Nikkari T. Effect of repeated endotoxin treatment and hypercholesterolemia on preatherosclerotic lesions in weaned pigs. Part II. Lipid and glycosaminoglycan analysis of intima and inner media. Atherosclerosis 1988; 72:173-81. [PMID: 3145744 DOI: 10.1016/0021-9150(88)90078-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We compared the effects of mild hypercholesterolemia and repeated endotoxin infusions on the biochemical composition of aortic intima and inner media of 24 piglets divided into 4 groups 5 days after weaning: controls on normal diet (group I); normal diet and endotoxin (group II); fat-supplemented diet (group III); and fat-supplemented diet and endotoxin (group IV). It was found that mild hypercholesterolemia increased the concentration of arterial esterified cholesterol and the relative amount of the fraction containing chondroitin sulphates A and C in total glycosaminoglycans. Endotoxin infusions partly prevented the increase of serum cholesterol caused by the fat-supplemented diet but had no independent effect on the arterial biochemical composition; nor did they affect the biochemical changes caused by hypercholesterolemia. When the results of all groups were combined, chondroitin sulphates A and C showed a significant positive correlation with the concentration of arterial esterified cholesterol and the percentage of linoleic acid in arterial cholesteryl esters. Serum total cholesterol did not correlate with arterial cholesterol fractions, but the ratio of high density lipoprotein-cholesterol to total serum cholesterol showed a negative association with arterial esterified cholesterol. The present findings indicate that (1) mild hypercholesterolemia is atherogenic in young piglets, and (2) changes in arterial glycosaminoglycan composition might be one of the earliest biochemical alterations in atherogenesis.
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Affiliation(s)
- S Ylä-Herttuala
- Department of Biomedical Sciences, University of Tampere, Finland
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14
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Pesonen E, Kaprio E, Rapola J, Soveri T, Viikari J, Savilahti E, Ylä-Herttuala S, Oksanen H. Effect of repeated endotoxin treatment and hypercholesterolemia on preatherosclerotic lesions in weaned pigs. Part 1. Scanning and transmission electron microscopic study. Atherosclerosis 1987; 65:89-98. [PMID: 3300669 DOI: 10.1016/0021-9150(87)90010-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Endothelial cell damage is considered to be the primary event in atherogenesis. In this study we compared the effects of mild hypercholesterolemia and repeated E. coli endotoxin infusions on the endothelial cells of the coronary arteries of the pig. We divided 24 pigs into 4 groups: I: controls on normal diet; II: normal diet and endotoxin treatment; III: fat-supplemented diet; IV: fat-supplemented diet and endotoxin treatment. The animals on a fat-supplemented diet showed the most frequent and most severe endothelial cell damage. The damage was less when this diet was combined with endotoxin treatment. Endotoxin reduced the serum total cholesterol level (P less than 0.01). The cholesterol level correlated very significantly (P less than 0.001) with endothelial damage of the coronary arteries. Mild hypercholesterolemia (s-cholesterol 5.68 mmol/l, controls 2.28 mmol/l) was thus associated with toxic effects in the endothelial cells. The E. coli endotoxin infusions did not have any cumulative effect on the lesions.
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