Journal
INTERNAL MEDICINE
Volume 40, Issue 10, Pages 1015-1019Publisher
JAPAN SOC INTERNAL MEDICINE
DOI: 10.2169/internalmedicine.40.1015
Keywords
low density lipoprotein; polyacrylamide gel electrophoresis; postprandial lipid metabolism
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We report a 43-year-old Japanese man with hypobetalipoproteinemia likely due to apolipoprotein (apo) B-76, a new truncation of apo B, and with homozygousity for the apo E2 isoform. He had no history suggestive of fat malabsorption and no sign of neurological disorder. His fasting baseline serum low-density lipoprotein (LDL) cholesterol and apo B levels were approximately half of normal. His plasma apo E level was elevated and its phenotype showed the E2/E2 homozygote. SDS-polyacrylamide gel electrophoresis of delipidated LDL fraction revealed a new truncated apo B, designated as apo B-76 according to the centile system of nomenclature. The postprandial lipid metabolism of the patient showed an almost normal response after fat loading.
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