2022 Fiscal Year Final Research Report
Development of treatment for Parkinson's disease by improving striatal function
Project/Area Number |
20K06910
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 46030:Function of nervous system-related
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Research Institution | Osaka University |
Principal Investigator |
Beck Goichi 大阪大学, 大学院医学系研究科, 特任講師(常勤) (20626353)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | パーキンソン病 / 線条体 / L-ドパ / ジスキネジア / ウィルスベクター / ΔFosB / DREADDs / グルタミン酸受容体 |
Outline of Final Research Achievements |
L-Dopa-induced dyskinesia (LID) is associated with upregulation of striatal delta FosB, or hyperactivity of medium spiny neurons (MSNs), in animal models and patients with Parkinson's disease (PD). Animals with dopamine depletion received striatal injections of rAAV-delta FosB shRNA, the inhibitory DREADDs (designer receptor exclusively activated by designer drugs) hM4Di or a control virus before exposure to chronic L-Dopa treatment. Development of LIDs during the entire L-Dopa treatment period was markedly inhibited by delta FosB gene knockdown (KD) or chronic activation of inhibitory DREADDs. The antiparkinsonian action of L-Dopa was unchanged. This shRNA-based method of gene KD applied did not cause structural/cellular damage in the striatum. These results indicate that strategies to reduce the gene KD of delta FosB or to reduce the hyperactivity of MSNs could inhibit the development of LIDs.
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Free Research Field |
神経内科学
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Academic Significance and Societal Importance of the Research Achievements |
L-ドパ誘発性ジスキネジアは、慢性期パーキンソン病患者においてADLを著しく低下させる運動合併症であるが、現時点では有効な治療法が存在しない。本研究では、動物モデルにおいてL-ドパの抗パーキンソン病効果を減弱することなく、かつウィルス注入による神経細胞毒性を呈することなく、有意にL-ドパ誘発性ジスキネジアの発現を抑制することができた。本研究の成果は、L-ドパ誘発性ジスキネジアに対する有効な新規治療法として可能性を有するものであり、慢性期パーキンソン病患者に対する新たな治療選択肢として期待できると考えられる。
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