Ceramides predict verbal memory performance in coronary artery disease patients undertaking exercise: a prospective cohort pilot study

• Published in: BMC geriatrics Vol. 13; no. 1; p. 135
• Main Authors: Saleem, Mahwesh, Bandaru, Veera V Ratnam, Herrmann, Nathan, Swardfager, Walter, Mielke, Michelle M, Oh, Paul I, Shammi, Prathiba, Kiss, Alexander, Haughey, Norman J, Rovinski, Randal, Lanctôt, Krista L
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 12.12.2013; BioMed Central
• Subjects: Age; Aged; Biomarkers; Biomarkers - blood; Cardiovascular disease; Care and treatment; Ceramides; Ceramides - blood; Cognitive ability; Cohort Studies; Coronary Artery Disease - blood; Coronary Artery Disease - diagnosis; Coronary Artery Disease - psychology; Coronary heart disease; Data analysis; Dementia; Diagnosis; Exercise; Exercise - physiology; Exercise - psychology; Exercise therapy; Family medical history; Female; Geriatrics; Health aspects; Health sciences; Heart attacks; High performance liquid chromatography; Humans; Hypertension; Male; Medical research; Memory; Memory - physiology; Middle Aged; Mortality; Neurology; Older people; Patients; Physical fitness; Pilot Projects; Plasma; Predictive Value of Tests; Prospective Studies; Psychomotor Performance - physiology; Rehabilitation; Studies; Verbal learning; Verbal Learning - physiology; United States
• ISSN: 1471-2318; 1471-2318
• DOI: 10.1186/1471-2318-13-135

Coronary artery disease (CAD) is associated with verbal memory decline, although deterioration may be mitigated in individuals undertaking exercise interventions. Ceramide sphingolipids, suggested to play a role in pathological neurodegeneration, have been associated with the development and progression of CAD but their relationship with cognitive response to exercise has not been assessed. In this study, concentrations of very long chain ceramides (C22:0 and C24:0) were assessed as predictors of changes in verbal memory performance over 1 year in subjects with CAD undertaking cardiac rehabilitation (CR). Verbal memory was measured using the California Verbal Learning Test 2nd Ed. (CVLT-II), from which Z-scores were calculated based on age, gender and education matched norms. Baseline plasma C22:0 and C24:0 ceramide concentrations were measured from fasting blood samples using high performance liquid chromatography coupled electrospray ionization tandem mass spectrometry (LC/MS/MS). Repeated measures general linear models were used to determine the association between baseline plasma ceramides and the change in verbal memory performance over 1 year of CR controlling for age and body mass index (BMI). In patients with CAD (n = 33, mean age = 62 ± 9 years, 84.8% male, years of education = 17 ± 3 years), higher baseline plasma C22:0 (F1, 29 = 5.30, p = 0.03) and C24:0 (F1, 29 = 4.04, p = 0.05) concentrations significantly predicted less improvement in verbal memory performance over 1 year of CR controlling for age and BMI. Plasma ceramide concentrations should be further examined as potential predictors of cognitive response to exercise and worse cognitive outcomes in patients with CAD.