What question did this study set out to answer?

Investigate the molecular mechanisms through which cardiac myosin autoantibodies induce cellular signaling and cardiac dysfunction in autoimmune myocarditis.

December 1, 2006The Journal of ImmunologyOpen Access

Mimicry and Antibody-Mediated Cell Signaling in Autoimmune Myocarditis

View Full Paper

Ask AI

Bookmark

Why the study?

How do autoantibodies against cardiac myosin lead to heart dysfunction in autoimmune myocarditis?

Key Points

Investigate the molecular mechanisms through which cardiac myosin autoantibodies induce cellular signaling and cardiac dysfunction in autoimmune myocarditis.
Assessed anti-cardiac myosin (CM) sera and monoclonal antibodies from experimental autoimmune myocarditis models for heart cell-surface binding and signaling activation.
Evaluated cAMP-dependent protein kinase A signaling modulation using cardiac myosin, anti-IgG, and β-adrenergic receptor (β-AR) pathway inhibitors.
Conducted passive transfer of purified IgG from CM-immunized rats into recipient animals to assess antibody deposition, apoptosis, and cardiomyopathic disease phenotypes.
Anti-CM autoantibodies bound to heart cell surfaces and induced protein kinase A signaling by mimicking the β-adrenergic receptor.
Antibody-mediated signaling of protein kinase A was completely blocked by cardiac myosin, anti-IgG, or specific β-AR pathway inhibitors.
Passive transfer of purified anti-CM IgG triggered significant cardiac IgG deposition, heart cell apoptosis, and a cardiomyopathy phenotype in recipient rats.

Structured PICO

How do autoantibodies against cardiac myosin lead to heart dysfunction in autoimmune myocarditis?

Population

Experimental autoimmune myocarditis model (rats) and heart cells

Intervention

Autoantibodies to cardiac myosin (CM) and passive transfer of purified IgG from CM-immunized rats

Outcome

Ab-mediated cAMP-dependent protein kinase A activity and cardiomyopathic heart disease phenotypesurrogate

Autoantibodies against cardiac myosin mimic beta-adrenergic receptors to induce pathogenic cell signaling and cardiomyopathy in experimental models.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Implicates anti-CM autoantibodies in beta-AR-driven experimental cardiomyopathy; hypothesis-generating for human autoimmune myocarditis.

Cite This Study

Li et al. (2006) studied this question.

synapsesocial.com/papers/69d56ce575589c71d767ce5c https://doi.org/10.4049/jimmunol.177.11.8234

View Full Paper

Ask AI

Bookmark

Mimicry and Antibody-Mediated Cell Signaling in Autoimmune Myocarditis

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Mimicry and Antibody-Mediated Cell Signaling in Autoimmune Myocarditis

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Keep reading

Keep reading