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Fractalkine/CX3CR1 in Dilated Cardiomyopathy: A Potential Future Target for Immunomodulatory Therapy?

Visvesh Jeyalan1,2, David Austin1,3, Shu Xian Loh4

  • 1Academic Cardiovascular Unit, The James Cook University Hospital, Middlesbrough TS4 3BW, UK.

Cells
|October 13, 2023
PubMed

Insights

Dilated cardiomyopathy involves enlarged heart chambers and reduced pumping function. Immune cell activity and cytomegalovirus seropositivity are linked to worse outcomes, suggesting new therapeutic targets.

Area of Science:

  • Cardiology
  • Immunology
  • Pathology

Background:

  • Dilated cardiomyopathy (DCM) is a heart condition characterized by enlarged ventricles and impaired systolic function, affecting over 1 in 250 individuals.
  • Mortality in DCM is high, primarily due to heart failure and sudden cardiac death.
  • Myocardial damage, from genetic or environmental factors, triggers cardiac inflammation and immune cell infiltration.

Purpose of the Study:

  • To investigate the association between CX3CR1 upregulation, immune cell migration, and cytomegalovirus (CMV) seropositivity with adverse outcomes in dilated cardiomyopathy.
  • To explore the potential role of cardiac inflammation and fibrosis in adverse cardiac remodeling.
  • To hypothesize the potential benefit of immune modulators targeting this pathway for improved DCM patient outcomes.

Main Methods:

  • Analysis of myocardial biopsy tissues to identify inflammatory cell infiltrates, including T lymphocytes.
  • Review of existing evidence linking CX3CR1 expression, immune cell activity, and CMV seropositivity to DCM patient outcomes.
  • Hypothesis generation based on observed associations and proposed mechanisms.

Main Results:

  • Upregulation of CX3CR1, immune cell migration, and CMV seropositivity are associated with worse outcomes in patients with dilated cardiomyopathy.
  • Cardiac inflammation and fibrosis are implicated in the adverse remodeling process.
  • Current medical therapies do not fully mitigate adverse outcomes in DCM.

Conclusions:

  • The pathway involving CX3CR1, immune cell infiltration, and CMV seropositivity represents a potential therapeutic target for dilated cardiomyopathy.
  • Targeting this immune-mediated pathway may offer improved outcomes beyond current guideline-recommended therapies.
  • Further research into immune modulators is warranted to improve management of DCM.

Keywords:
CX3CR1T lymphocytescytomegalovirusdilated cardiomyopathyfractalkine

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