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Related Concept Videos

Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...

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Isolation and Characterization of Cardiac Mesenchymal Stromal Cells from Endomyocardial Bioptic Samples of Arrhythmogenic Cardiomyopathy Patients
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Decrease in dendritic cells in endomyocardial biopsies of human dilated cardiomyopathy.

Rudin Pistulli1, Sebastian König, Stefanie Drobnik

  • 1Clinic of Internal Medicine I, Division of Cardiology and Intensive Care Medicine, University Hospital of Jena, Germany. rudin.pistulli@med.uni-jena.de

European Journal of Heart Failure
|April 23, 2013
PubMed
Summary
This summary is machine-generated.

Dendritic cells (DCs) are significantly reduced in the heart muscle of patients with dilated cardiomyopathy (DCM). This DC deficiency is linked to poorer heart function and may stem from tissue damage and poor vascularization in heart failure.

Keywords:
Dendritic cellDilated cardiomyopathyEndomyocardial biopsyMyocarditis

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Area of Science:

  • Immunology
  • Cardiology
  • Pathology

Background:

  • Dendritic cells (DCs) are crucial immune sentinels.
  • Their role in myocardial disease, specifically dilated cardiomyopathy (DCM), remains largely unknown.
  • Investigating DC presence in DCM is vital for understanding cardiac immune responses.

Purpose of the Study:

  • To investigate the presence and characteristics of dendritic cells (DCs) within the myocardium of human dilated cardiomyopathy (DCM) patients.
  • To correlate DC levels with disease severity, fibrosis, apoptosis, and clinical outcomes.

Main Methods:

  • Immunohistochemical analysis of endomyocardial biopsies from 72 DCM patients and 18 controls.
  • Quantification of DCs, antigen-presenting cells (APCs), T cells, macrophages, fibrosis, and apoptosis.
  • Polymerase chain reaction for viral genomes and clinical follow-up for ejection fraction (EF) changes.

Main Results:

  • Myocardial DCs (all subtypes and maturation stages) were significantly decreased in DCM patients compared to controls.
  • Regulatory T cells and apoptosis markers were overexpressed in DCM.
  • Reduced DCs correlated with endothelial progenitor cells, increased fibrosis, and inversely with ejection fraction change.

Conclusions:

  • Symptomatic DCM patients exhibit reduced myocardial dendritic cells (DCs).
  • This DC reduction is associated with unfavorable short-term outcomes, including decreased ejection fraction.
  • Potential causes include myocardial tissue damage, cellular death, and insufficient vascularization in chronic heart failure.