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2021 Fiscal Year Final Research Report

Elucidation and Prevention of Progressive Multifocal Leukoencephalopathy Induced by Disease-Modifying Drugs in Japanese Patients with Multiple Sclerosis

Research Project

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Project/Area Number 19K07997
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionKyushu University

Principal Investigator

Kawano Yuji  九州大学, 医学研究院, 共同研究員 (20333479)

Co-Investigator(Kenkyū-buntansha) 松下 拓也  九州大学, 大学病院, 講師 (00533001)
渡邉 充  九州大学, 大学病院, 助教 (30748009)
中村 優理  九州大学, 医学研究院, 共同研究員 (40822375)
磯部 紀子  九州大学, 医学研究院, 教授 (60452752)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords多発性硬化症 / 進行性多巣性白質脳症 / 疾患修飾薬
Outline of Final Research Achievements

Progressive multifocal leukoencephalopathy (PML) is a major problem in multiple sclerosis (MS) due to the immunosuppressive state caused by disease-modifying drugs. In this study, we aimed to elucidate the reasons why PML is frequently caused by disease-modifying drugs in Japanese MS and to identify risk factors for PML. We found that patients with one HLA had lower anti-JCV antibody positivity and antibody titer, while those with another HLA had higher antibody titer, and that antibody titer was higher in fingolimod users with a longer treatment history, and that age and HLA were related to antibody positivity by multivariate logistic analysis.

Free Research Field

神経免疫学

Academic Significance and Societal Importance of the Research Achievements

医療が進歩し,多くの病気の治療法が開発され,大きな成果をあげている.その一方で,治療に伴う新たな疾患の発症が問題になっている.多発性硬化症ではフィンゴリモド(多発性硬化症再発抑制薬)による進行性多巣性白質脳症(PML, しばしば致死性になる)発症が問題になっている.本研究では,JCVの原因ウイルスに対する抗体価(ウイルスが体内に存在することの指標)には年齢とHLAの関与が大きいことを明らかにした.したがって,予めリスクの大きい患者に対しては,別の治療法の選択や,厳重なPML発症管理により治療継続できる可能性を示した.

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Published: 2023-01-30  

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