C-13 APPEARANCE IN PLASMA-GLUCOSE AND BREATH CO2 DURING FEEDING WITH NATURALLY C-13-ENRICHED STARCHY FOOD IN NORMAL HUMANS

被引:56
作者
NORMAND, S
PACHIAUDI, C
KHALFALLAH, Y
GUILLUY, R
MORNEX, R
RIOU, JP
机构
[1] FAC PHARM ROCKEFELLER,LEACM,LYONS,FRANCE
[2] HOP EDOUARD HERRIOT,SERV ENDOCRINOL DIABET & NUTR,F-69374 LYONS 08,FRANCE
关键词
STABLE ISOTOPE; C-13; STARCH; MASS SPECTROMETRY; BREATH TEST; HUMAN; ORAL LOAD; FOOD TECHNOLOGY;
D O I
10.1093/ajcn/55.2.430
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
We have used a recently developed technique (isotope-ratio mass spectrometer) to measure C-13 appearance in plasma glucose and breath CO2 in eight normal subjects during feeding with naturally C-13-enriched starch. C-13 in CO2 and plasma glucose, metabolites and insulin concentrations, carbohydrates, and lipid oxidation were measured after ingestion of 76 g glucose equivalent of crackers, pasta, or polenta. C-13 in plasma glucose displays a very different pattern from plasma glucose concentration. It increases steadily for 90 min before reaching a plateau for almost-equal-to 2 h and slowly declines during the last 2 h of the study. No significant difference was observed with the three different starchy foods tested although plasma glucose tended to be higher during feeding with polenta. In summary measurement of C-13 in plasma glucose during feeding with naturally C-13-labeled carbohydrates yields new insight in the study of carbohydrate bioavailability in humans.
引用
收藏
页码:430 / 435
页数:6
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