CONTEXT: Ceramide causes endothelial apoptosis and emphysema-like changes in animal models. OBJECTIVES: Test if plasma sphingomyelin, a major precursor of ceramide, would predict longitudinal increase in the percentage of emphysema-like lung on computed tomography (CT). MATERIALS AND METHODS: 3840 participants had their plasma sphingomyelin measured at baseline examination and their pulmonary emphysema measured on cardiac CT scans at baseline and on follow-up visits. Mixed effects models were used to adjust for potential confounders. RESULTS: One standard deviation increase in sphingomyelin predicted a 0.12% per year (95% CI: 0.02-0.22; p = 0.019) greater increase of percent emphysema. DISCUSSION AND CONCLUSION: Higher plasma levels of sphingomyelin predicted greater annual increase in quantitatively measured percent emphysema.
CONTEXT: Ceramide causes endothelial apoptosis and emphysema-like changes in animal models. OBJECTIVES: Test if plasma sphingomyelin, a major precursor of ceramide, would predict longitudinal increase in the percentage of emphysema-like lung on computed tomography (CT). MATERIALS AND METHODS: 3840 participants had their plasma sphingomyelin measured at baseline examination and their pulmonary emphysema measured on cardiac CT scans at baseline and on follow-up visits. Mixed effects models were used to adjust for potential confounders. RESULTS: One standard deviation increase in sphingomyelin predicted a 0.12% per year (95% CI: 0.02-0.22; p = 0.019) greater increase of percent emphysema. DISCUSSION AND CONCLUSION: Higher plasma levels of sphingomyelin predicted greater annual increase in quantitatively measured percent emphysema.
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