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2023 Fiscal Year Final Research Report

Comprehensive and rapid diagnosis of non-tuberculous mycobacterial pulmonary disease by using multi-locus sequence typing

Research Project

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Project/Area Number 21K08194
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionOsaka Toneyama Medical Center

Principal Investigator

Kida Hiroshi  独立行政法人国立病院機構大阪刀根山医療センター(臨床研究部), 独立行政法人国立病院機構大阪刀根山医療センター, 呼吸器内科部長 (80512988)

Co-Investigator(Kenkyū-buntansha) 福島 清春  大阪大学, 免疫学フロンティア研究センター, 特任助教(常勤) (00752156)
Project Period (FY) 2021-04-01 – 2024-03-31
KeywordsMGIT-seq法 / NALC-seq法 / MLST法 / mlstverse / target capture sequence / マクロライド耐性肺MAC症
Outline of Final Research Achievements

In the treatment of NTM pulmonary disease (PD), species identification and drug susceptibility testing following sputum acid-fast bacillus culture involve complex procedures that are labor-intensive and time-consuming. The primary objective of this research project was to position the newly developed comprehensive NTM species identification system (mlstverse) within the clinical practice of NTM PD treatment. We linked mlstverse with liquid culture (MGIT-seq) and demonstrated the utility of the MGIT-seq method, which includes drug susceptibility prediction, in a prospective clinical trial. Additionally, we discovered five new NTM species using the mlstverse method. Furthermore, we successfully developed the NALC-seq method, which allows for direct species identification from sputum specimens treated with NALC without the need for culture.

Free Research Field

呼吸器内科学

Academic Significance and Societal Importance of the Research Achievements

MGIT-seq法は抗酸菌菌種同定、薬剤感受性検査を精緻化、時短化するだけでなく、検査技師人材不足に悩む病院でもインターネットに接続可能なら実施可能であるため、肺NTM症診療の均てん化に貢献する。また省力化によって、全ての病院で抗酸菌菌種同定、薬剤感受性検査が普及し、例えばマクロライド耐性可塑性など、感染症学における重要なテーマを提供するようになる。mlstverseによる新種発見が細菌学の裾野を拡げることは言うまでもない。NALC-seq法による培養を経ない菌種同定検査法はさらなる時短化とともに培養検査よるバイアスフリーの気道感染菌情報を提供し、呼吸器感染症学におけるブレークスルーを起こす。

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Published: 2025-01-30  

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