| Project/Area Number |
22790219
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
General physiology
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| Research Institution | Akita University (2011)
Keio University (2010) |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 含硫アミノ酸 / Cystathionine β-synthase (CBS) / Cystathionine γ-lyase (CSEまたはCTH) / 硫化水素 / ホモシスチン尿症 / 妊娠高血圧腎症 / Cystathionine β-synthase / Cystathionine γ-lyase / アミノ酸トランスポーター / Cystationine β-synthase / Cystationine γ-lyase |
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| Research Abstract |
Cystathionine β-synthase (CBS) and cystathionine γ-lyase (CSE) are the transsulfuration enzymes that are involved in sulfur amino acids metabolism. CBS-deficient patients show severe clinical symptoms, while CSE-deficient persons are considered to be free of any clinical manifestations. Although both enzymes are primarily expressed in the liver and the kidney of mice, their roles in the kidney remain to be elucidated. In CBS-deficient mice, the urinary excretion of toxic methionine was much lower efficiency, while the cystathionine was efficiently excreted into the urine in CSE-deficient mice. The efficiency of excretion is considered to be related to the difference of symptoms. Pregnancy-induced hypertension and proteinuria was developed in normal-appearing CSE-deficient mice. H2S that has vasorelaxant activity is known to be produced by CBS and CSE, and its distribution was overlapped with both enzymes in kidney.
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