Metabolomic insights in advanced cardiomyopathy of chronic chagasic and idiopathic patients that underwent heart...

Area of Science:

• Biochemistry
• Cardiology
• Metabolomics

Background:

• Heart failure (HF) research often overlooks Chronic Chagasic Cardiomyopathy (CCC), a prevalent condition in Latin America.
• CCC is a progressive inflammatory heart disease impacting cardiac conduction, yet its molecular basis remains unclear.
• Understanding CCC's unique pathogenesis is vital for patient management and therapeutic development.

Purpose of the Study:

• To characterize and differentiate the plasma metabolomic profiles of advanced HF patients with CCC versus Idiopathic Dilated Cardiomyopathy (IDC).
• To identify specific metabolic imbalances associated with each heart failure type.
• To explore potential links between metabolic profiles and clinical course differences.

Main Methods:

• Plasma samples from 15 advanced HF patients (8 CCC, 7 IDC) and 12 healthy heart donors were analyzed.
• Gas chromatography/quadrupole time-of-flight mass spectrometry was employed for comprehensive metabolomic profiling.
• Statistical analysis identified discriminating metabolites between HF types and controls.

Main Results:

• Advanced HF patients (CCC and IDC) showed significant metabolic imbalances compared to controls, with 21 discriminating metabolites.
• Key imbalances included accumulation of fatty acids, amino acids, and tricarboxylic acid cycle components.
• Distinct metabolic profiles were observed between CCC and IDC, with 12 CCC-specific and 11 IDC-specific metabolites, primarily involving amino acid metabolism.

Conclusions:

• Metabolic profiling reveals significant differences between Chronic Chagasic Cardiomyopathy and Idiopathic Dilated Cardiomyopathy.
• These metabolic disparities may contribute to the varying clinical trajectories observed in Chagas' disease patients.
• Targeting specific metabolic pathways could offer novel therapeutic strategies for different HF etiologies.