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Detection of novel causative genes and elucidation of the pathomechanisms of undiagnosed cases of inborn errors of immunity by whole exome sequencing analysis

Research Project

Project/Area Number 22K20905
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0902:General internal medicine and related fields
Research InstitutionTokyo Medical and Dental University (2023)
National Center for Global Health and Medicine (2022)

Principal Investigator

Takada Sanami  東京医科歯科大学, 大学院医歯学総合研究科, プロジェクト助教 (60733904)

Project Period (FY) 2022-08-31 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords先天性免疫異常症 / 全エクソーム解析
Outline of Research at the Start

先天性免疫異常症は、発熱や感染症を繰り返し、重症例は死に至るため、早期の診断・治療が必要であり、そのために原因遺伝子の同定が喫緊の課題である。本研究では、先天性免疫異常症の症例を集積し、これまで他分野の単一遺伝子疾患の新規原因遺伝子を多数同定した実績のある全エクソーム解析技術を用いることで、先天性免疫異常症の新規原因遺伝子を同定する。続いて、発症メカニズムの解明と、その遺伝子が原因となる新しい先天性免疫異常症の疾患概念の確立を目指す。本研究成果は、新たな診断法・治療法開発につながるのみならず、未知の免疫機構の解明に寄与すると期待される。

Outline of Final Research Achievements

Inborn errors of immunity are rare diseases causing defects of immune systems by specific gene variants. It is required to detect the causing genes for early diagnosis and proper treatments. Still, a lot of cases of inborn errors of immunity remain undiagnosed, who requires detection of their causing genes.
In this study, we collected new 8 cases of inborn errors of immunity for analysis of whole exome sequencing and 121 cases for re-analysis. By whole exome sequencing analysis of new cases, we identified a variant of novel candidate causing gene. We studied the pathomechanism of the defect of immune system of the gene variant, which revealed the function abnormality of the gene variant carried by the patient.

Academic Significance and Societal Importance of the Research Achievements

これまで診断のついていなかった先天性免疫異常症患者の新たな原因遺伝子を同定し機能解析を行ったことは、免疫異常症のメカニズムの解明や、ヒトが病原体から身を守る免疫機構の解明に大きく寄与すると考えられた。また今後は、まだ診断がついていないが同じ原因遺伝子変異をもつ他の患者の診断や、将来的な治療法開発へとつながる成果であり、患者への還元につながり社会に貢献する研究成果であった。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (2 results)

All 2023 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results)

  • [Int'l Joint Research] Hospital de Puerto Montt/Universidad San Sebastian/Instituto Nacional del Torax(チリ)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Human phenotype caused by biallelic KDM4B frameshift variant2023

    • Author(s)
      Takada Sanami、Silva Sebastian、Zamorano Ivonne、Perez Andrea、Iwabuchi Chisato、Miyake Noriko
    • Journal Title

      Clinical Genetics

      Volume: 105 Issue: 1 Pages: 72-76

    • DOI

      10.1111/cge.14409

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research

URL: 

Published: 2022-09-01   Modified: 2025-01-30  

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