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Coxsackievirus-induced myocarditis: new trends in treatment
Zhen Liu1, Ji Yuan, Bobby Yanagawa
1Department of Pathology & Laboratory Medicine, James Hogg iCAPTURE Centre for Cardiovascular & Pulmonary Research, St. Paul's Hospital, University of British Columbia, Vancouver, Canada.
Insights
Viral myocarditis, a heart condition in young people, lacks effective treatments. Emerging therapies target virus entry, replication, and immune response, offering new hope for patients.
Area of Science:
- Cardiology
- Virology
- Immunology
Background:
- Myocarditis is a significant inflammatory heart condition in children and young adults.
- Coxsackievirus B3 is identified as the primary cause of viral myocarditis.
- Current treatments for viral myocarditis are predominantly supportive, lacking targeted antiviral efficacy.
Purpose of the Study:
- To review and discuss emerging therapeutic strategies for viral myocarditis.
- To explore novel treatments targeting viral entry, replication, and host immune responses.
- To examine the potential of cellular cardiomyoplasty as an end-stage therapy.
Main Methods:
- Literature review of current and emerging treatments for viral myocarditis.
- Analysis of antiviral agents targeting virus entry (e.g., pleconaril, CAR-Fc).
- Evaluation of nucleic acid-based therapies (e.g., antisense oligodeoxynucleotide, short interfering RNA) and immunomodulatory agents (e.g., interferons).
Main Results:
- Several promising therapeutic candidates are emerging, including direct antiviral agents and immunomodulatory drugs.
- Novel strategies involve modulating signal transduction pathways and enzyme inhibitors.
- Cellular cardiomyoplasty shows potential for end-stage treatment, with preliminary clinical trials underway.
Conclusions:
- The landscape of viral myocarditis treatment is evolving with diverse therapeutic approaches.
- Targeting viral entry, replication, and immune modulation offers promising avenues for treatment.
- Cellular cardiomyoplasty represents a potential future therapy for advanced cases of myocarditis.
Abstract:
Myocarditis is a common inflammatory heart disease in children and young adults that may result in chronically dilated cardiomyopathy. Coxsackievirus B3 is the major etiologic agent of this disease. Current treatments for patients with viral myocarditis are almost entirely supportive. In recent years, some promising therapeutic candidates have emerged, including novel treatments and improvements of existing drugs. Among these are molecules that specially target virus entry, such as pleconaril, WIN 54954 and CAR-Fc; nucleic acid-based antiviral agents that inhibit viral translation and/or transcription, such as antisense oligodeoxynucleotide and short interfering RNA; and immunomodulatory agents that augment the host-protective immune responses to effectively clear viruses from target tissues, including interferons and immunoglobulins. In addition, certain new antiviral strategies, still in the early stages, include modulation of signal transduction pathways responsible for viral replication using enzyme inhibitors, which have revealed potential therapeutic targets for viral myocarditis. Finally, the progress in cellular cardiomyoplasty for end-stage therapy, in particular the preliminary clinical trials, is also discussed with respect to its potential future application.
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