高度なグリケーション末端製品は,糖尿病合併症におけるキメーゼに依存したアンジオテンシンII生成経路を活性化させます
Vijay Koka1, Wansheng Wang, Xiao Ru Huang
1Department of Medicine-Nephrology, Baylor College of Medicine, Houston, TX 77030, USA.
Circulation
|March 8, 2006
まとめ
高度グリケーションエンド製品 (AGEs) は,RAGE-ERK1/2経路経由で糖尿病におけるキマゼを誘導する. このキメーゼは,アンジオテンシンIIの産生に大きく貢献し,糖尿病性血管疾患において重要な役割を果たします.
科学分野:
- 血管生物学 血管生物学
- 糖尿病 合併症 糖尿病の合併症
- 酵素学 酵素学とは
背景:
- アンジオテンシンIIは,糖尿病に関連する血管疾患の重要な媒介体である.
- チマゼは,高血圧および糖尿病における代替アンジオテンシンII生成酵素であるが,糖尿病における誘導機構は不明である.
研究 の 目的:
- 糖尿病性血管疾患におけるキメーゼ誘導のメカニズムを調査する.
主な方法:
- 糖尿病患者の動脈におけるキメーゼアップレギュレーションを検出するための免疫ヒストケミストリー.
- AGEsに曝されたヒト血管の滑らかな筋肉細胞を用いたインビトロ研究.
- RAGE抗体の中和とERK1/2経路の阻害実験.
主要な成果:
- チマゼは,糖尿病患者の冠動脈と腎動脈で上調されます.
- 先進型グリケーションエンド製品 (AGEs) は,RAGE-ERK1/2 MAPキナーゼ経路経由でキメーゼ発現を誘導する.
- チマゼは,AGE誘発によるアンジオテンシンII生成の70%以上を占めています.
結論:
- AGEsは,糖尿病におけるRAGE-ERK1/2 MAPキナーゼ経路を通じてキーマゼを誘導する.
- チマゼは,糖尿病性血管疾患におけるアンジオテンシンII生成のための重要な代替経路を表しています.
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