• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Analysis of the tremor in patients with anti-NF155 antibody-positive CIDP

Research Project

Project/Area Number 19K17036
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Inamizu Saeko  九州大学, 大学病院, 医員 (30822994)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsneurofascin 155 / CIDP / 自己抗体 / 振戦 / 表面筋電図 / 脳神経 / 視神経 / 抗NF155抗体陽性CIDP / NF155
Outline of Research at the Start

慢性炎症性脱髄性多発神経炎(CIDP)の一部に傍絞輪部蛋白neurofascin 155 (NF155)に対する自己抗体が関与している。抗NF155抗体が陽性のCIDPでは、高い頻度で振戦を認めるが、責任病巣は未だ不明である。振戦は責任部位により性質が異なることが分かっており、表面筋電図検査を行うことで振戦を定量的に評価できる。抗NF155抗体陽性のCIDPの振戦を表面筋電図で評価し、責任病巣を推定する。また、患者由来モノクローナル抗NF155抗体を用いて抗NF155抗体陽性CIDPの振戦を動物モデルで再現し、推定した振戦の責任部位に基づき、治療薬を見出すことを目的とする。

Outline of Final Research Achievements

Surface electromyography was performed on five patients to reveal the nature and source of tremor in anti-neurofascin 155 (NF155) antibody-positive chronic inflammatory demyelinating polyneuropathy (CIDP). As a result, patients could be divided into two groups according to the frequencies of hand tremor, indicating that several mechanisms and anatomical sites might cause the tremor in anti-NF155 antibody-positive CIDP.
To elucidate the frequency and patterns of optic, trigeminal, and facial nerve involvement in anti-NF155 antibody-positive CIDP, 13 patients were subjected to neurological examination, visual-evoked potential (VEP) testing, and blink reflex. Absent or prolonged VEPs were observed in 10/13 (76.9%) patients and 17/26 (65.4%) eyes. All 12 patients tested for blink reflex had abnormalities. These results suggest that demyelination frequently occurs in the optic, trigeminal, and facial nerves in this condition.

Academic Significance and Societal Importance of the Research Achievements

抗NF155抗体陽性CIDPは、同抗体陰性CIDPと異なる臨床的特徴や、治療反応性を有することが明らかとなっており、今後独立した疾患単位となる可能性がある。今回明らかにした振戦の様式により抗NF155抗体陽性CIDP症例を更に細分化できる可能性が示唆された。また、抗NF155抗体陽性CIDPでは脳神経障害が高頻度に生じることが明らかとなったため、同疾患と診断された症例については、積極的に電気生理学的検査を行い、早期に脳神経障害を同定することが望まれる。これらの所見が治療効果判定にも利用できる可能性がある。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (2 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Optic, trigeminal, and facial neuropathy related to anti-neurofascin 155 antibody.2020

    • Author(s)
      Ogata H , Zhang X , Inamizu S , Yamashita K , Yamasaki R , Matsushita T, Isobe N, Hiwatashi A, Tobimatsu S, Kira J.
    • Journal Title

      Ann Clin Transl Neurol

      Volume: 11 Issue: 11 Pages: 2297-2309

    • DOI

      10.1002/acn3.51220

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Frequent subclinical cranial nerve involvement in IgG4 anti-NF155 antibody-positive CIDP2021

    • Author(s)
      Hidenori Ogata, Xu Zhang, Saeko Inamizu, Ryo Yamasaki, Takuya Matsushita, Noriko Isobe, Jun-ichi Kira
    • Organizer
      第61回日本神経学会学術集会
    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi