A humanized HLA-DR4 mouse model for autoimmune myocarditis

M. Emrah Şelli, Anita C. Thomas, David C. Wraith, Andrew C. Newby

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)
223 Downloads (Pure)

Abstract

Abstract Myocarditis, the principal cause of dilated cardiomyopathy and heart failure in young adults, is associated with autoimmunity to human cardiac α-myosin (hCAM) and the DR4 allele of human major histocompatibility II (MHCII). We developed an hCAM-induced myocarditis model in human HLA-DR4 transgenic mice that lack all mouse MHCII genes, demonstrating that immunization for 3 weeks significantly increased splenic T-cell proliferative responses and titres of IgG1 and IgG2c antibodies, abolished weight gain, provoked cardiac inflammation and significantly impaired cardiac output and fractional shortening, by echocardiography, compared to adjuvant-injected mice. Neither cardiac dilatation nor fibrosis occurred at this time point but prolonging the experiment was associated with mortality. Treatment with mixtures of hCAM derived peptides predicted to have high affinity for DR4 significantly preserved ejection fraction and fractional shortening. Our new humanized mouse model of autoimmune cardiomyopathy should be useful to refine hCAM-derived peptide treatment.
Original languageEnglish
Pages (from-to)22-26
JournalJournal of Molecular and Cellular Cardiology
Volume107
Early online date18 Apr 2017
DOIs
Publication statusPublished - Jun 2017

Keywords

  • Autoimmunity
  • Myocarditis
  • Cardiomyopathy
  • Heart failure

Fingerprint

Dive into the research topics of 'A humanized HLA-DR4 mouse model for autoimmune myocarditis'. Together they form a unique fingerprint.

Cite this