Sudden coronary death, pokkuri disease, and lipoprotein-associated sphingosine 1-phosphate

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We have proposed that triglyceride-rich lipoprotein remnants are associated with the risk of sudden coronary death in younger cases without coronary atherosclerosis. However, it remains unclear how remnants are involved in coronary sudden death. In the present study, we tried to relate sphingosine1-phosphate (S1P), which is concentrated in lipoproteins, and apolipoprotein M, an S1P binding apolipoprotein, to sudden death. Our new assay method to detect S1P allowed to measure a low concentration of S1P in serum; however, there are any significant difference in S1P levels between normal and sudden death patients. We are now focusing on the difference in two dimensionalelectrophoresis pattern measured by anti-apoA-I and anti-apoM antidodies.