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2014 Fiscal Year Final Research Report

Elucidation of pathogenic mechanisms and developing new therapies of myasthenia gravis

Research Project

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Project/Area Number 24390228
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Neurology
Research InstitutionTokyo Metropolitan Geriatric Hospital and Institute of Gerontology

Principal Investigator

SHIGEMOTO KAZUHIRO  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究部長 (40284400)

Co-Investigator(Kenkyū-buntansha) MORI Shuuichi  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究員 (30508677)
EDAMATSU Midori  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究員 (10735343)
MIYAZAKI Tsuyoshi  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究員 (50376480)
KOSHI Katsuo  地方独立行政法人東京都健康長寿医療センター(東京都健康長寿医療センター研究所), 東京都健康長寿医療センター研究所, 研究員 (20710057)
Co-Investigator(Renkei-kenkyūsha) KONISHI Tetsuro  独立行政法人国立病院機構宇多野病院, 神経内科, 院長 (50426508)
Project Period (FY) 2012-04-01 – 2015-03-31
Keywords重症筋無力症 / 神経筋シナプス / 自己抗体 / MuSK / 疾患モデル / LRP4
Outline of Final Research Achievements

1.Some patients with myasthenia gravis (MG) caused by antibodies against muscle-specific kinase (MuSK; MuSKMG) apparently do not respond to immunosuppressive therapy and rapidly progress to life-threatening muscle atrophy. In addition, long-term administration of corticosteroids, which are first-line treatment of MG, is frequently responsible for severe adverse effect. We found that rapamycin treatment suppressed occurrence of MG-like phenotypes, including weight loss and significant decrement of compound muscle action potentials with the histological evidence. Rapamycin may be useful as an immunomodulation drug of MG.
2. We generated a murine model of MG caused by anti-Lrp4 antibodies via active immunization of LRP4 protein, providing the evidence for the pathogenicity of anti-Lrp4 antibodies. We expect our approach and the model will be of value to the MG research community, helping to accelerate development of therapeutic candidates for clinical translation.

Free Research Field

神経学

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Published: 2016-06-03  

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