[Recent studies on dilated cardiomyopathy caused by TTN mutations in children]

Area of Science:

• Cardiovascular Genetics
• Molecular Cardiology
• Pediatric Cardiology

Background:

• Dilated cardiomyopathy (DCM) is a significant cause of heart failure in children.
• Mutations in the Titin (TTN) gene are the most frequent genetic etiology identified in pediatric DCM.
• Understanding TTN mutations is crucial for diagnosing and managing inherited cardiomyopathies.

Approach:

• Comprehensive review of global research on TTN gene mutations in pediatric DCM.
• Analysis of studies focusing on molecular pathogenesis, including transcriptional and post-translational modifications.
• Examination of clinical phenotypes associated with TTN-related pediatric DCM.

Key Points:

• TTN gene mutations disrupt titin protein function, leading to myocardial dysfunction and DCM.
• Diverse clinical presentations of pediatric DCM are observed, influenced by specific TTN mutation types and locations.
• Emerging gene therapy strategies offer potential for targeted treatment of TTN-associated DCM.

Conclusions:

• TTN mutations represent a major genetic driver of pediatric DCM, necessitating further research into their complex pathogenesis.
• A deeper understanding of TTN mutation mechanisms will facilitate the development of effective precision therapies.
• This review provides a foundation for advancing the clinical management and therapeutic interventions for children with TTN-related DCM.