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Noninvasive assessment of the brain redox status in chronic kidney disease mouse using overhauser-enhanced magnetic resonance imaging

Research Project

Project/Area Number 20790039
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Physical pharmacy
Research InstitutionKyushu University

Principal Investigator

YAMATO Mayumi  Kyushu University, 先端融合医療レドックスナビ研究拠点, 准教授 (30380695)

Project Period (FY) 2008 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsイメージング / グルタミン酸 / 脳 / 腎不全 / レドックス
Research Abstract

Urea toxin is suggested to be induced the glutamatergic neuronal damage mediated by the activity of N-methyl-D-aspartate (NMDA) receptor. In this study, we aimed to demonstrate brain redox alterations in chronic kidney disease mouse noninvasively, using overhauser-enhanced magnetic resonance imaging (OMRI).
The reduction rate of 3-methoxycarbonyl-2,2,5,5-tetramethylpyrrolidine-l-oxyl (methoxycarbonyl-PROXYL), a redox-sensitive contrast agent, was used as an index of the redox status in vivo. No changes were seen in the 8-OHdG (8-Hydroxydeoxyguanosine) or the memory disturbance at 2 or 4 weeks after CKD onset, but after 4 weeks of CKD, the methoxycarbonyl-PROXYL reduction rate, calculated from continuous images, had increased significantly. At 8 weeks after CKD onset, we observed an increase in the number of 8-OHdG-immunopositive cells and the disturbance in the memory. Thus, the noninvasive imaging of the brain redox alterations was associated with the initial stages of CKD cause brain injury.

Report

(3 results)
  • 2009 Annual Research Report   Final Research Report ( PDF )
  • 2008 Annual Research Report

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Published: 2008-04-01   Modified: 2016-04-21  

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