[The effect of parboiled rice on glycemia in Wistar rats].
Starch is an important energy source and can represent more than 60% of the calories of the human diet. The starch fraction resistant to enzymatic digestion is called resistant starch. When rice is parboiled, the starch retrogrades with the formation of type 3-resistant starch (retrograded), which presents beneficial effects on the health, since it acts as a prebiotic. In the present study three types of rice were selected, with high, medium and low amylose contents, with the objective of evaluating the effects of conventional and parboiled rice on glycemia in Wistar rats. The samples with high and medium amylose contents were soaked for 6 h at 65 degrees C, and the low amylose sample for 7 h at 70 degrees C. The samples were subsequently autoclaved for 10 minutes at 0.7kgf x cm(-2). Six male Wistar rats were used for each treatment. Seven experimental diets were elaborated, formulated according to AIN-93M, the control diet and diets substituting the carbohydrate source with conventional or parboiled rice. Resistant starch was determined in the diets and glycemia monitored using glucose paper strips, the sample being blood obtained from the distal part of the rat's tail. For the glycemic curve, glycemia was measured in the fasting state and during 90 minutes post-prandial. The results indicated there were no significant differences between the diets formulated with high, medium and low amylose, parboiled or conventionally prepared, with respect to fasting or post-prandial glycemia in Wistar rats.
Universidade Federal de Pelotas - Departamento de Ciência e Tecnologia Agroindustrial. Pelotas, RS, Brasil.
Elizabete
E
Helbig
Alvaro Renato Guerra
AR
Días
Rafael Aldrighi
RA
Tavares
Manoel Artigas
MA
Schirmer
Moacir Cardoso
MC
Elias
D000688:Amylose / Q000378:metabolism*; D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D001786:Blood Glucose / Q000378:metabolism*; D005511:Food Handling; D038321:Glycemic Index; D008297:Male; D012275:Oryza / Q000737:chemistry*; D019518:Postprandial Period; D051381:Rats; D017208:Rats, Wistar
D001786:Blood Glucose; D000688:Amylose
Arroz parboilizado efeito na glicemia de ratos Wistar.