Identification of Hypoplastic Left Heart Genotypes and Phenotypes; The Window toward Future Cell-Based Therapy: A...

Area of Science:

• Cardiology
• Developmental Biology
• Genetics

Background:

• Hypoplastic left heart syndrome (HLHS) is a common and fatal single ventricle anomaly.
• Early prenatal diagnosis can be challenging due to the progressive nature of left heart hypoplasia.
• HLHS is a heterogeneous congenital heart disease with varied phenotypes, complicating treatment strategies.

Purpose of the Study:

• To provide comprehensive information on HLHS phenotypes and genotypes.
• To explore novel molecular strategies for HLHS treatment.
• To highlight the importance of phenotypic determination for identifying etiologic factors and therapeutic approaches.

Main Methods:

• Review of current literature on HLHS phenotypes, genotypes, and molecular mechanisms.
• Analysis of genetic defects and flow-mediated factors contributing to HLHS.
• Discussion of emerging molecular therapeutic strategies based on genetic etiologies.

Main Results:

• HLHS exhibits diverse phenotypes and non-Mendelian genetic origins.
• Genetic defects impact endocardial and cardiomyocyte development, leading to valve and myocardial malformations.
• Current therapeutic goals focus on enhancing right ventricular function and exploring biventricular conversion.

Conclusions:

• Phenotypic and genotypic characterization is fundamental for effective HLHS management.
• Novel molecular therapies targeting genetic causes offer potential for improved treatment.
• Future research aims to establish biventricular physiology in selected HLHS cases.