Abstract:
AIMS:Supernatants of serum-free cultured mononuclear cells (MNC) contain a mix of immunomodulating factors (secretome), which have been shown to attenuate detrimental inflammatory responses following myocardial ischaemia. Inflammatory dilated cardiomyopathy (iDCM) is a common cause of heart failure in young patients. Experimental autoimmune myocarditis (EAM) is a CD4+ T cell-dependent model, which mirrors important pathogenic aspects of iDCM. The aim of this study was to determine the influence of MNC secretome on myocardial inflammation in the EAM model. METHODS AND RESULTS:BALB/c mice were immunized twice with an alpha myosin heavy chain peptide together with Complete Freund adjuvant. Supernatants from mouse mononuclear cells were collected, dialysed, and injected i.p. at Day 0, Day 7, or Day 14, respectively. Myocarditis severity, T cell responses, and autoantibody formation were assessed at Day 21. The impact of MNC secretome on CD4+ T cell function and viability was evaluated using in vitro proliferation and cell viability assays. A single high-dose application of MNC secretome, injected at Day 14 after the first immunization, effectively attenuated myocardial inflammation. Mechanistically, MNC secretome induced caspase-8-dependent apoptosis in autoreactive CD4+ T cells. CONCLUSION:MNC secretome abrogated myocardial inflammation in a CD4+ T cell-dependent animal model of autoimmune myocarditis. This anti-inflammatory effect of MNC secretome suggests a novel and simple potential treatment concept for inflammatory heart diseases.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Hoetzenecker K,Zimmermann M,Hoetzenecker W,Schweiger T,Kollmann D,Mildner M,Hegedus B,Mitterbauer A,Hacker S,Birner P,Gabriel C,Gyöngyösi M,Blyszczuk P,Eriksson U,Ankersmit HJdoi
10.1093/eurheartj/ehs459subject
Has Abstractpub_date
2015-03-14 00:00:00pages
676-85issue
11eissn
0195-668Xissn
1522-9645pii
ehs459journal_volume
36pub_type
杂志文章abstract::Advanced coronary artery disease (CAD), impaired left ventricular function and prolongation of the QT-interval are considered risk factors for sudden cardiac death in CAD-patients. So far, however, there are no studies investigating in detail whether there is a correlation between the QT-interval and changes in corona...
journal_title:European heart journal
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doi:10.1093/oxfordjournals.eurheartj.a061951
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更新日期:2015-12-14 00:00:00
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