The constantly evolving spectrum of phenotypes in titinopathies - will it ever stop?

Area of Science:

• Genetics
• Cardiology
• Neurology

Background:

• The titin gene (TTN) is crucial in muscle and heart function.
• Its large size historically hindered comprehensive genetic analysis.
• Recent research confirms TTN's significant role in muscle diseases and cardiomyopathies.

Purpose of the Study:

• To review recent advances in diagnosing titinopathies.
• To highlight the impact of TTN gene mutations on muscle and cardiac health.

Main Methods:

• High-throughput sequencing methods for TTN gene analysis.
• Review of current literature on titinopathies and associated genetic variants.

Main Results:

• Widespread availability of high-throughput TTN sequencing has led to an increase in identified titinopathies.
• Recessive missense variants in TTN require further confirmation.
• Significant progress in understanding TTN's role in various muscle disorders.

Conclusions:

• Accurate diagnosis of titinopathies is now achievable.
• Patients benefit from precise prognoses, genetic counseling, and targeted treatments.
• Early identification prevents misdiagnoses and inappropriate medical interventions.