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  • Title: Plasma lipids and lipoproteins of Japanese adults and umbilical cord blood.
    Author: Nakai T, Tamai T, Yamada S, Kobayashi T, Hayashi T, Kutsumi Y, Oida K, Takeda R.
    Journal: Artery; 1981; 9(2):132-50. PubMed ID: 7295046.
    Abstract:
    By means of sequential ultracentrifugation of plasma from 85 control healthy Japanese subjects and from 15 maternal infant pairs, very low density lipoprotein (VLDL: d less than 1.006 g/ml), low density lipoprotein (LDL: 1.006 less than d less than 1.063 g/ml) and high density lipoprotein (HDL: d greater than 1.063 g/ml) were obtained and analyzed for cholesterol (Ch), triglyceride (TG), phospholipid (PL) and apolipoprotein B (Apo B). These results were compared to values in Western countries reported in the literature. HDL-Ch/LDL-Ch of adult Japanese was much higher than that of subjects in Western countries, especially in males. Umbilical cord (U) plasma-Ch, TG, PL and Apo B were 73.3 +/- 15.9, 51.0 +/- 10.4, 110.0 +/- 21.0 and 47.6 +/- 15.7 (mean +/- S.D.) mg/100 ml, respectively. In cord blood the concentrations of Ch, TG and PL in all lipoprotein density classes were less than one half of those in normal adults. Cord blood has higher levels of HDL-Ch and lower levels of LDL-Ch than normal adults. Therefore, HDL-Ch/LDL-Ch ratio in cord blood (1.58 +/- 0.32 was far higher than the ratio in normal adults (0.50 +/- 0.11). In cord blood, HDL was the predominant Ch, TG and PL carrying lipoprotein. HDL-Ch/LDL-Ch ratios were 1.58 in Japan, 1.14 in USA, 0.89 in Australia and 0.69 in GDR. HDL-Ch/LDL-Ch ratio in Japanese cord blood was the highest among the values reported in the literature. The relationships between maternal and infant lipoproteins were more significant in HDL than in VLDL or LDL. The positive correlation between maternal HDL and infant HDL may suggest the possibility of placental transfer of intact HDL particles.
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