Metabolic Regulation of Homocysteine in Type 2 Diabetic Goto-Kakizaki Rats

, Jung Min Oh; , Su Jeong Yeo; , Bong-Hee Kim; , Sang Kyum Kim

Published online January 1, 1986

Journal of Environmental Toxicology 2007;22(2):165-170.

당뇨병 Goto-Kakizaki 랫트에서 호모시스테인의 대사조절

오정민, 여수정, 김봉희, 김상겸

Metabolic Regulation of Homocysteine in Type 2 Diabetic Goto-Kakizaki Rats

Jung Min Oh , Su Jeong Yeo , Bong-Hee Kim , Sang Kyum Kim

ABSTRACT

Elevation of homocysteine levels is a risk factor for cardiovascular diseases and liver diseases. It has been reported that both streptozotocin-induced type I diabetic rats and obese type Ⅱ diabetic rats have plasma total homocysteine lower than each control rats. We determined the effects of lean type Ⅱ diabetes on homocysteine levels using type 2 diabetic Goto-Kakizaki rats. The concentrations of serum glucose were increased to ~twofold of control levels and the total cholesterol levels were also increased in GK rats. Hepatic aspartate, histidine, threonine, alanine and methionine levels were significantly increased in GK rats. Plasma aspartate and glutamate levels were elevated, but threonine and arginine levels were decreased in GK rats. Plasma total homocysteine levels were not changed in GK rats, but hepatic total homocysteine levels were increased to ~three-fold of control levels. These results suggest that hepatic metabolism of sulfur-amino acid may be altered in diabetic condition.

Keywords: type Ⅱ diabetes; homocysteine; hepatic metabolism; amino acid