Anti-apoA-1 auto-antibodies increase mouse atherosclerotic plaque vulnerability, myocardial necrosis and mortality triggering TLR2 and TLR4

Summary Auto-antibodies to apolipoprotein A-1 (anti-apoA-1 IgG) were shown to promote inflammation and atherogenesis, possibly through innate immune receptors signalling. Here, we aimed at investigating the role of Toll-like receptors (TLR) 2 and 4 on anti-apoA-1 IgG-induced athero-sclerotic plaque...

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Veröffentlicht in:Thrombosis and haemostasis 2015-08, Vol.113 (2), p.410-422
Hauptverfasser: Montecucco, Fabrizio, Braunersreuther, Vincent, Burger, Fabienne, Lenglet, Sébastien, Pelli, Graziano, Carbone, Federico, Fraga-Silva, Rodrigo, Stergiopulos, Nikolaos, Monaco, Claudia, Mueller, Christian, Pagano, Sabrina, Dallegri, Franco, Mach, François, Vuilleumier, Nicolas
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container_end_page 422
container_issue 2
container_start_page 410
container_title Thrombosis and haemostasis
container_volume 113
creator Montecucco, Fabrizio
Braunersreuther, Vincent
Burger, Fabienne
Lenglet, Sébastien
Pelli, Graziano
Carbone, Federico
Fraga-Silva, Rodrigo
Stergiopulos, Nikolaos
Monaco, Claudia
Mueller, Christian
Pagano, Sabrina
Dallegri, Franco
Mach, François
Vuilleumier, Nicolas
description Summary Auto-antibodies to apolipoprotein A-1 (anti-apoA-1 IgG) were shown to promote inflammation and atherogenesis, possibly through innate immune receptors signalling. Here, we aimed at investigating the role of Toll-like receptors (TLR) 2 and 4 on anti-apoA-1 IgG-induced athero-sclerotic plaque vulnerability, myocardial necrosis and mortality in mice. Adult male apolipoprotein E knockout (ApoE) -/- (n=72), TLR2 -/- ApoE -/- (n=36) and TLR4 -/- Apo -/- (n=28) mice were intravenously injected with 50 µg/mouse of endotoxin-free polyclonal anti-apoA-1 IgG or control isotype IgG (CTL IgG) every two weeks for 16 weeks. Atherosclerotic plaque size and vulnerability were assessed by histology. Myocardial ischaemia and necrosis, respectively, were determined by electrocardiographic (ECG) changes assessed by telemetry and serum troponin I (cTnI) measurements. Impact on survival was assessed by Kaplan-Meier analyses. In ApoE -/- mice, anti-apoA-1 IgG passive immunisation enhanced histological features of athero-sclerotic plaque vulnerability (increase in neutrophil and MMP-9 and reduction in collagen content), induced a substantial cTnI elevation (p=0.001), and increased mortality rate by 23 % (LogRank, p=0.04) when compared to CTL IgG. On a subgroup of ApoE -/- mice equipped with telemetry (n=4), a significant ST-segment depression was noted in anti-apoA-1 IgG-treated mice when compared to CTL IgG recipients (p< 0.001), and an acute ST-segment elevation myocardial infarction preceding mouse death was observed in one case. The deleterious effects of anti-apoA-1 IgG on atherosclerotic plaque vulnerability, myocardial necrosis and death were partially reversed in TLR2 -/- ApoE -/- and TLR4 -/- ApoE -/- backgrounds. In conclusion, anti-apoA-1 auto-antibodies seem to be active mediators of atherosclerotic plaque vulnerability, myocardial necrosis, and mortality in mice through TLR2- and TLR4-mediated pathways.
doi_str_mv 10.1160/TH14-12-1039
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Here, we aimed at investigating the role of Toll-like receptors (TLR) 2 and 4 on anti-apoA-1 IgG-induced athero-sclerotic plaque vulnerability, myocardial necrosis and mortality in mice. Adult male apolipoprotein E knockout (ApoE) -/- (n=72), TLR2 -/- ApoE -/- (n=36) and TLR4 -/- Apo -/- (n=28) mice were intravenously injected with 50 µg/mouse of endotoxin-free polyclonal anti-apoA-1 IgG or control isotype IgG (CTL IgG) every two weeks for 16 weeks. Atherosclerotic plaque size and vulnerability were assessed by histology. Myocardial ischaemia and necrosis, respectively, were determined by electrocardiographic (ECG) changes assessed by telemetry and serum troponin I (cTnI) measurements. Impact on survival was assessed by Kaplan-Meier analyses. In ApoE -/- mice, anti-apoA-1 IgG passive immunisation enhanced histological features of athero-sclerotic plaque vulnerability (increase in neutrophil and MMP-9 and reduction in collagen content), induced a substantial cTnI elevation (p=0.001), and increased mortality rate by 23 % (LogRank, p=0.04) when compared to CTL IgG. On a subgroup of ApoE -/- mice equipped with telemetry (n=4), a significant ST-segment depression was noted in anti-apoA-1 IgG-treated mice when compared to CTL IgG recipients (p&lt; 0.001), and an acute ST-segment elevation myocardial infarction preceding mouse death was observed in one case. The deleterious effects of anti-apoA-1 IgG on atherosclerotic plaque vulnerability, myocardial necrosis and death were partially reversed in TLR2 -/- ApoE -/- and TLR4 -/- ApoE -/- backgrounds. 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Here, we aimed at investigating the role of Toll-like receptors (TLR) 2 and 4 on anti-apoA-1 IgG-induced athero-sclerotic plaque vulnerability, myocardial necrosis and mortality in mice. Adult male apolipoprotein E knockout (ApoE) -/- (n=72), TLR2 -/- ApoE -/- (n=36) and TLR4 -/- Apo -/- (n=28) mice were intravenously injected with 50 µg/mouse of endotoxin-free polyclonal anti-apoA-1 IgG or control isotype IgG (CTL IgG) every two weeks for 16 weeks. Atherosclerotic plaque size and vulnerability were assessed by histology. Myocardial ischaemia and necrosis, respectively, were determined by electrocardiographic (ECG) changes assessed by telemetry and serum troponin I (cTnI) measurements. Impact on survival was assessed by Kaplan-Meier analyses. In ApoE -/- mice, anti-apoA-1 IgG passive immunisation enhanced histological features of athero-sclerotic plaque vulnerability (increase in neutrophil and MMP-9 and reduction in collagen content), induced a substantial cTnI elevation (p=0.001), and increased mortality rate by 23 % (LogRank, p=0.04) when compared to CTL IgG. On a subgroup of ApoE -/- mice equipped with telemetry (n=4), a significant ST-segment depression was noted in anti-apoA-1 IgG-treated mice when compared to CTL IgG recipients (p&lt; 0.001), and an acute ST-segment elevation myocardial infarction preceding mouse death was observed in one case. The deleterious effects of anti-apoA-1 IgG on atherosclerotic plaque vulnerability, myocardial necrosis and death were partially reversed in TLR2 -/- ApoE -/- and TLR4 -/- ApoE -/- backgrounds. 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Braunersreuther, Vincent ; Burger, Fabienne ; Lenglet, Sébastien ; Pelli, Graziano ; Carbone, Federico ; Fraga-Silva, Rodrigo ; Stergiopulos, Nikolaos ; Monaco, Claudia ; Mueller, Christian ; Pagano, Sabrina ; Dallegri, Franco ; Mach, François ; Vuilleumier, Nicolas</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-132244c567610553f873b08e05fdad7d308477e3dd2d1a809e40505b8d874cd53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Animals</topic><topic>Aortic Diseases - pathology</topic><topic>Apolipoprotein A-I - antagonists &amp; inhibitors</topic><topic>Apolipoprotein A-I - immunology</topic><topic>Apolipoproteins E - deficiency</topic><topic>Atherosclerosis and Ischaemic Disease</topic><topic>Autoantibodies - adverse effects</topic><topic>Collagen - analysis</topic><topic>Disease Susceptibility</topic><topic>Immunization, Passive - adverse effects</topic><topic>Immunoglobulin G - adverse effects</topic><topic>Lipids - analysis</topic><topic>Male</topic><topic>Mice</topic><topic>Mice, Knockout</topic><topic>Myocardial Infarction - etiology</topic><topic>Myocardial Infarction - immunology</topic><topic>Myocardial Infarction - pathology</topic><topic>Myocardial Ischemia - blood</topic><topic>Myocardial Ischemia - etiology</topic><topic>Myocardial Ischemia - immunology</topic><topic>Myocardial Ischemia - pathology</topic><topic>Myocardium - pathology</topic><topic>Necrosis</topic><topic>Plaque, Atherosclerotic - genetics</topic><topic>Plaque, Atherosclerotic - immunology</topic><topic>Plaque, Atherosclerotic - metabolism</topic><topic>Signal Transduction - immunology</topic><topic>Telemetry</topic><topic>Toll-Like Receptor 2 - deficiency</topic><topic>Toll-Like Receptor 2 - genetics</topic><topic>Toll-Like Receptor 2 - physiology</topic><topic>Toll-Like Receptor 4 - deficiency</topic><topic>Toll-Like Receptor 4 - genetics</topic><topic>Toll-Like Receptor 4 - physiology</topic><topic>Troponin I - blood</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Montecucco, Fabrizio</creatorcontrib><creatorcontrib>Braunersreuther, Vincent</creatorcontrib><creatorcontrib>Burger, Fabienne</creatorcontrib><creatorcontrib>Lenglet, Sébastien</creatorcontrib><creatorcontrib>Pelli, Graziano</creatorcontrib><creatorcontrib>Carbone, Federico</creatorcontrib><creatorcontrib>Fraga-Silva, Rodrigo</creatorcontrib><creatorcontrib>Stergiopulos, Nikolaos</creatorcontrib><creatorcontrib>Monaco, Claudia</creatorcontrib><creatorcontrib>Mueller, Christian</creatorcontrib><creatorcontrib>Pagano, Sabrina</creatorcontrib><creatorcontrib>Dallegri, Franco</creatorcontrib><creatorcontrib>Mach, François</creatorcontrib><creatorcontrib>Vuilleumier, Nicolas</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><jtitle>Thrombosis and haemostasis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Montecucco, Fabrizio</au><au>Braunersreuther, Vincent</au><au>Burger, Fabienne</au><au>Lenglet, Sébastien</au><au>Pelli, Graziano</au><au>Carbone, Federico</au><au>Fraga-Silva, Rodrigo</au><au>Stergiopulos, Nikolaos</au><au>Monaco, Claudia</au><au>Mueller, Christian</au><au>Pagano, Sabrina</au><au>Dallegri, Franco</au><au>Mach, François</au><au>Vuilleumier, Nicolas</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Anti-apoA-1 auto-antibodies increase mouse atherosclerotic plaque vulnerability, myocardial necrosis and mortality triggering TLR2 and TLR4</atitle><jtitle>Thrombosis and haemostasis</jtitle><addtitle>Thromb Haemost</addtitle><date>2015-08-01</date><risdate>2015</risdate><volume>113</volume><issue>2</issue><spage>410</spage><epage>422</epage><pages>410-422</pages><issn>0340-6245</issn><eissn>2567-689X</eissn><abstract>Summary Auto-antibodies to apolipoprotein A-1 (anti-apoA-1 IgG) were shown to promote inflammation and atherogenesis, possibly through innate immune receptors signalling. Here, we aimed at investigating the role of Toll-like receptors (TLR) 2 and 4 on anti-apoA-1 IgG-induced athero-sclerotic plaque vulnerability, myocardial necrosis and mortality in mice. Adult male apolipoprotein E knockout (ApoE) -/- (n=72), TLR2 -/- ApoE -/- (n=36) and TLR4 -/- Apo -/- (n=28) mice were intravenously injected with 50 µg/mouse of endotoxin-free polyclonal anti-apoA-1 IgG or control isotype IgG (CTL IgG) every two weeks for 16 weeks. Atherosclerotic plaque size and vulnerability were assessed by histology. Myocardial ischaemia and necrosis, respectively, were determined by electrocardiographic (ECG) changes assessed by telemetry and serum troponin I (cTnI) measurements. Impact on survival was assessed by Kaplan-Meier analyses. In ApoE -/- mice, anti-apoA-1 IgG passive immunisation enhanced histological features of athero-sclerotic plaque vulnerability (increase in neutrophil and MMP-9 and reduction in collagen content), induced a substantial cTnI elevation (p=0.001), and increased mortality rate by 23 % (LogRank, p=0.04) when compared to CTL IgG. On a subgroup of ApoE -/- mice equipped with telemetry (n=4), a significant ST-segment depression was noted in anti-apoA-1 IgG-treated mice when compared to CTL IgG recipients (p&lt; 0.001), and an acute ST-segment elevation myocardial infarction preceding mouse death was observed in one case. The deleterious effects of anti-apoA-1 IgG on atherosclerotic plaque vulnerability, myocardial necrosis and death were partially reversed in TLR2 -/- ApoE -/- and TLR4 -/- ApoE -/- backgrounds. In conclusion, anti-apoA-1 auto-antibodies seem to be active mediators of atherosclerotic plaque vulnerability, myocardial necrosis, and mortality in mice through TLR2- and TLR4-mediated pathways.</abstract><cop>Germany</cop><pub>Schattauer GmbH</pub><pmid>25879306</pmid><doi>10.1160/TH14-12-1039</doi><tpages>13</tpages></addata></record>
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ispartof Thrombosis and haemostasis, 2015-08, Vol.113 (2), p.410-422
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language eng
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source MEDLINE; Thieme Connect Journals
subjects Animals
Aortic Diseases - pathology
Apolipoprotein A-I - antagonists & inhibitors
Apolipoprotein A-I - immunology
Apolipoproteins E - deficiency
Atherosclerosis and Ischaemic Disease
Autoantibodies - adverse effects
Collagen - analysis
Disease Susceptibility
Immunization, Passive - adverse effects
Immunoglobulin G - adverse effects
Lipids - analysis
Male
Mice
Mice, Knockout
Myocardial Infarction - etiology
Myocardial Infarction - immunology
Myocardial Infarction - pathology
Myocardial Ischemia - blood
Myocardial Ischemia - etiology
Myocardial Ischemia - immunology
Myocardial Ischemia - pathology
Myocardium - pathology
Necrosis
Plaque, Atherosclerotic - genetics
Plaque, Atherosclerotic - immunology
Plaque, Atherosclerotic - metabolism
Signal Transduction - immunology
Telemetry
Toll-Like Receptor 2 - deficiency
Toll-Like Receptor 2 - genetics
Toll-Like Receptor 2 - physiology
Toll-Like Receptor 4 - deficiency
Toll-Like Receptor 4 - genetics
Toll-Like Receptor 4 - physiology
Troponin I - blood
title Anti-apoA-1 auto-antibodies increase mouse atherosclerotic plaque vulnerability, myocardial necrosis and mortality triggering TLR2 and TLR4
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