非結核性ミコバクテリア性肺疾患の分子疫学的監視:単一センターの予備的なコホート研究

Kazuki Hashimoto^1,2,3, Kiyoharu Fukushima^1,2,3, Yuki Matsumoto²

¹Department of Respiratory Medicine and Clinical Immunology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.

Microbiology spectrum

|August 21, 2025

まとめ

非結核性ミコバクテリア性肺疾患の病原体シフトは,患者の約4分の1で起こります. 新しいシーケンス・メソッドはこれらの変化を正確に追跡しパーソナライズされた患者のケアと治療調整に役立ちます

科学分野:

微生物学
ゲノミクス
感染症

背景:

非結核性菌根性肺疾患 (NTMPD) は,種,亜種,または株レベルで病原体が進化する慢性感染症です.
これらの病原体の動態を追跡することは効果的な治療に不可欠ですが現在の方法は非効率です
既存の臨床実践では,NTMPD病原体の縦断的な変化をモニタリングするための強力なツールが不足しています.

研究の目的:

NTMPD患者におけるミコバクテリアの種/亜種および株レベルの動態を調査する.
菌株レベルを決定するための単純な配列ベースの方法を開発し評価する.
病原体のリアルタイムモニタリングによるNTMPD管理の革新

主な方法:

112人のNTMPD患者による前向きなコホート研究.
ゲノム全体のシーケンシング唾液のサンプル
従来の変数数タンデムリピート (VNTR) のタイプ化と新しいデジタル VNTR (dVNTR) の方法の開発と評価.

主要な成果:

病原体シフト (種/亜種または株レベル) は,1.5年以上の患者の25. 9%で検出されました.
コアゲノム多部位配列決定により,患者の11. 6%で種/亜種が特定されました.
VNTRとdVNTRのタイプ化により,14. 3%の患者でストレスの変化が検出され,dVNTR結果は従来のVNTRと相関した.
抗菌剤の感受性の変化が観察され,検出可能な病原体シフトのない患者では耐性が高かった.

結論:

病原体シフトはNTMPDにおいて重要な要因であり,抗菌剤の感受性に影響を与える.
定期的な種/亜種識別と分子型識別 (VNTR) は,患者のケアに不可欠です.
コアゲノムマルチロカスシーケンシング・タイピングとdVNTRは,NTMPDの病原体ダイナミクスを監視し,患者の管理を改善するための革新的なアプローチを提供します.

キーワード:

コアゲノム多部位配列のタイプ化デジタル変数数タンデムリピート遺伝子型決定次世代シーケンシング非結核菌

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