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Truncating Titin (TTN) Variants in Chemotherapy-Induced Cardiomyopathy
M Linschoten1, A J Teske1, A F Baas2
1Department of Cardiology, Division of Heart and Lungs, University Medical Center Utrecht, Utrecht, The Netherlands.
Journal of Cardiac Failure
|March 19, 2017
Summary
Chemotherapy-induced cardiomyopathy (CCMP) can cause severe heart failure. Genetic mutations in the TTN gene may increase susceptibility to CCMP in breast cancer patients.
Area of Science:
- Cardiology
- Oncology
- Genetics
Background:
- Chemotherapy-induced cardiomyopathy (CCMP) affects 9% of patients receiving anthracyclines.
- Current risk stratification for CCMP relies on clinical factors, inadequately addressing individual susceptibility.
- The genetic determinants of CCMP remain largely unknown.
Observation:
- This case series details two breast cancer patients who developed severe heart failure post-chemotherapy.
- Genetic screening identified truncating frameshift mutations in the TTN gene in both patients.
- TTN encodes the myofilament protein titin, crucial for muscle function.
Findings:
- This is the first reported association between truncating TTN variants and CCMP.
- TTN truncations are a leading cause of familial and sporadic dilated cardiomyopathy.
- The findings suggest a potential genetic link between TTN mutations and chemotherapy cardiotoxicity.
Implications:
- Further research is warranted to investigate the prevalence of TTN variants in CCMP patients.
- Identifying genetic predispositions could improve CCMP risk stratification and patient management.
- This discovery may pave the way for personalized cardiotoxicity monitoring in cancer patients.
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