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Biomedical subjects

H Shimasaki

Publications and source records attributed to H Shimasaki.

59 records · Page 4Linked to original sources
PubMedDate not supplied

Age and organ difference in amount and distribution of autofluorescent granules in rats.

The amount and distribution of autofluorescent granules in various organs and tissues of rats of different ages (2-, 11-, and 29.5-month-old) were compared by morphometrical analysis. The age-related increase of the granules was observed in the cardiac muscle and hepatic cells, but the amount of granules was little even in 29.5-month-old rats. In some other organs, the granules appeared early, at 2 months of age, increased up to 11 months, but thereafter no significant increase was observed. The autofluorescent granules are not merely considered to be an age-related pigment, but seems to be influenced by relationship to the cell metabolism and other functions.

Aging↗
PubMedDate not supplied

Double-blind controlled study on the effects of dietary diacylglycerol on postprandial serum and chylomicron triacylglycerol responses in healthy humans.

OBJECTIVE: The effects of dietary diacylglycerol (DG) on postprandial lipemia in healthy humans were investigated. METHODS: Forty normolipidemic male volunteers ingested fat emulsions containing either DG oil or triacylglycerol (TG) oil, at different doses: 10 g (n = 13), 20 g (n = 10) and 44 g (n = 17). Two test emulsions were given at seven-days intervals in random order. Fatty acid compositions of the test oils had been adjusted to be equal. Fasting and postprandial serum lipid concentrations in each group and plasma lipoprotein lipids in the 20 g-fat ingestion group were measured during the postprandial intervals. RESULTS: When DG emulsion was ingested, serum TG concentrations were significantly lower (p < 0.05) in the late postprandial phase, i.e., 4 hours, 6 hours as compared to the TG emulsion. The magnitude of postprandial lipemia (the area bounded by the curve above the fasting concentration) after ingestion of 44 g-DG emulsion was significantly less than that of 44 g-TG emulsion (6.54 +/- 5.12 and 8.45 +/- 7.54 mmol x h/L, mean +/- SD, respectively). Chylomicron TG, cholesterol, and phospholipid concentrations at 4 hours after ingestion of DG emulsion were significantly lower (p < 0.05) than those after the ingestion of TG emulsion at the same time point. No marked differences were observed for VLDL, LDL and HDL lipids between the test emulsions. CONCLUSION: In the usual range of fat intake (10-44 g), postprandial response after ingestion of DG emulsion was significantly less than that after ingestion of TG emulsion in healthy human subjects.

Adult↗