Race disparity in blood sphingolipidomics associated with lupus cardiovascular comorbidity


Autoři: Samar M. Hammad aff001;  Jasmyn R. Hardin aff002;  Dulaney A. Wilson aff003;  Waleed O. Twal aff001;  Paul J. Nietert aff003;  James C. Oates aff004
Působiště autorů: Department of Regenerative Medicine & Cell Biology, Medical University of South Carolina, Charleston, South Carolina, United States of America aff001;  College of Graduate Studies/Summer Undergraduate Research Program, Medical University of South Carolina, Charleston, South Carolina, United States of America aff002;  Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina, United States of America aff003;  Department of Medicine, Division of Rheumatology & Immunology, Medical University of South Carolina, Charleston, South Carolina, United States of America aff004
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224496

Souhrn

Systemic lupus erythematous (SLE) is a chronic multi-organ autoimmune disease. Genetic and environmental factors contribute to disease onset and severity. Sphingolipids are signaling molecules involved in regulating cell functions and have been associated with multiple genetic disease processes. African-Americans are more likely to suffer from SLE morbidity than Whites. The Medical University of South Carolina has banked plasma samples from a well-characterized lupus cohort that includes African-Americans and Whites. This study examined the influence of race on plasma sphingolipid profiles in SLE patients and association of sphingolipid levels with comorbid atherosclerosis and SLE disease activity. Mass spectrometry revealed that healthy African-Americans had higher sphingomyelin levels and lower lactosylcermide levels compared to healthy Whites. SLE patients, irrespective of race, had higher levels of ceramides, and sphingoid bases (sphingosine and dihydrosphingosine) and their phosphates compared to healthy subjects. Compared to African-American controls, African-American SLE patients had higher levels of ceramides, hexosylceramides, sphingosine and dihydrosphingosine 1-phosphate. Compared to White controls, White SLE patients exhibited higher levels of sphingoid bases and their phosphates, but lower ratios of C16:0 ceramide/sphingosine 1-phosphate and C24:1 ceramide/sphingosine 1-phosphate. White SLE patients with atherosclerosis exhibited lower levels of sphingoid bases compared to White SLE patients without atherosclerosis. In contrast, African-American SLE patients with atherosclerosis had higher levels of sphingoid bases and sphingomyelins compared to African-American SLE patients without atherosclerosis. Compared to White SLE patients with atherosclerosis, African-American SLE patients with atherosclerosis had higher levels of select sphingolipids. Plasma levels of sphingosine, C16:0 ceramide/sphingosine 1-phosphate ratio and C24:1 ceramide/sphingosine 1-phosphate ratio significantly correlated with SLEDAI in the African-American but not White SLE patients. The C16:0 ceramide/sphingosine 1-phosphate ratio in SLE patients, and levels of C18:1 and C26:1 lactosylcermides, C20:0 hexosylceramide, and sphingoid bases in SLE patients with atherosclerosis could be dependent on race. Further ethnic studies in SLE cohorts are necessary to verify use of sphingolipidomics as complementary diagnostic tool.

Klíčová slova:

African American people – Atherosclerosis – Blood plasma – Cardiovascular diseases – Cholesterol – Phosphates – Sphingolipids


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Článek vyšel v časopise

PLOS One


2019 Číslo 11