Research Project
Grant-in-Aid for Scientific Research (C)
We previously proposed that hyperglycemia-induced mitochondrial ROS overproduction is a key event in the development of diabetic complications. During 2006-2007, we have performed below project based on our hypothesis.In this study, we established a novel transgenic mouse (eMnSOD-Tg), which specifically expressed MnSOD in endothelial cells, by employing a Tie2 promoter/enhancer, and investigated the impact of mitochondrial ROS production on diabetic retinopathy in vivo. Using immunohistochemistry, overexpression of MnSOD in endothelial cells was confirmed in eMnSOD-Tg mice. By introduction of diabetes by streptozotocin, levels of urinary 8-hydroxydeoxyguanosine, a marker of mitochondrial oxidative stress, and expression of VEGF mRNA and protein and fibronectin mRNA in retinas were increased in wild-type littermates. However, these observations were ameliorated in eMnSOD-Tg mice, although control and eMnSOD-Tg mice showed a comparable level of hyperglycemia. In the present study, we newly developed a line of transgenic mice, which specifically express MnSOD in endothelium. In addition, overexpression of mitochondrial-specific SOD in endothelium could prevent diabetic retinopathy in vivo.
All 2008 2007 2006
All Journal Article (26 results) (of which Peer Reviewed: 9 results) Presentation (11 results)
Biochem Biophys Res Commun 366
Pages: 814-820
J Biol Chem 283
Pages: 9852-9862
Antioxid Redox Signal 9
Pages: 343-353
Atherosclerosis 191
Pages: 22-32
Circ Res 100
Pages: 1442-1451
Diabetes Res Clin Prat 77S
Diabetes Res Clin Pract77S
Antioxid.Redox Signal 9
Diabetes 55
Pages: 120-127
Pages: 1197-1204
日本体質医学会誌 68
Pages: 119-123
糖尿病合併症学会誌 20
Pages: 140-144