Gene expression in low glycemic index diet - impact on metabolic control.
BACKGROUND
Correcting postprandial hyperglycemia forms an important part of the prevention and management of type 2 diabetes.


METHODS
A low-glycemic-index liquid formula designated as Inslow was prepared by replacing dextrin in the standard balanced formula (SBF) with 55.7% palatinose. Long-term administration of Inslow prevented fatty liver and improved insulin resistance in rats. Expressions of mRNA of factors involved in glucose and lipid metabolism were determined to clarify its mechanism.


RESULTS
Analysis of mRNA expressions revealed that Inslow increased the expression of enzymes involved in Beta -oxidation and peroxisome proliferator-activated receptor-alpha (PPAR-alpha) in the liver, and increased PPAR-gamma, adiponectin and uncoupling protein 2 as well as decreased tumor necrosis factor alpha in adipose tissue in comparison with those of SBF.


CONCLUSIONS
Inslow may induce improvement of insulin resistance by accelerated Beta-oxidation through increased expression of the hepatic PPAR-alpha gene and adipocyte PPAR-gamma gene. Therefore, Inslow is a functional food which prevents and treats type 2 diabetes.
Department of Clinical Nutrition, Institute of Health Biosciences, University of Tokushima Graduate School, Tokushima, Japan.
Eiji
E
Takeda
Hidekazu
H
Arai
Kazusa
K
Muto
Kaoru
K
Matsuo
Masae
M
Sakuma
Makiko
M
Fukaya
Hisami
H
Yamanaka-Okumura
Hironori
H
Yamamoto
Yutaka
Y
Taketani
D000818:Animals; D003924:Diabetes Mellitus, Type 2 / Q000378:metabolism / Q000517:prevention & control*; D004195:Disease Models, Animal; D005786:Gene Expression Regulation; D038321:Glycemic Index; D006801:Humans; D018384:Oxidative Stress; D047493:PPAR alpha / Q000235:genetics*; D047495:PPAR gamma / Q000235:genetics*; D019518:Postprandial Period
D047493:PPAR alpha; D047495:PPAR gamma