機能性ディスペプシア治療における経皮耳介迷走神経刺激の島皮質調節効果
1Guang'anmen hospital, China Academy of Chinese Medical Sciences, Beijing, China; Institute of Basic Research Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, China.
Journal of affective disorders
|February 28, 2026
まとめ
経皮耳介迷走神経刺激(taVNS)は、脳結合の変化により機能性ディスペプシア(FD)の症状を改善した。この治療は、FD患者における前部島皮質(AI)および背外側前頭前野(DLPFC)の機能結合(FC)を正常化した。
科学分野:
- 神経科学
- 消化器病学
- 医用画像処理
背景:
- 機能性ディスペプシア(FD)は一般的な胃腸障害である。
- 以前の研究では、経皮耳介迷走神経刺激(taVNS)がFDの症状を緩和できることが示唆されている。
- FDにおけるtaVNS効果の正確な脳メカニズムは、依然として大部分不明である。
研究 の 目的:
- FD患者におけるtaVNSの脳調節効果を調査すること。
- 安静時機能的磁気共鳴画像法(rs-fMRI)を用いたFDのtaVNS治療に関連する機能的結合(FC)の変化を探求すること。
主な方法:
- 21人のFD患者と30人の健常対照者(HC)を募集した。
- FD患者は、8週間のtaVNS治療の前後にrs-fMRIスキャンを受けた。
- taVNS誘発性の脳変化を特定するために、ボクセルベースの機能的結合(FC)と相関を分析した。
主要な成果:
- FD患者はtaVNS治療後に有意な症状改善を報告した。
- 左背側前部島皮質(dAI)と左背外側前頭前野(DLPFC)間のベースラインFCは、FD患者の方がHCよりも高かった。
- taVNS治療は、前部島皮質(AI)のサブ領域とDLPFC、扁桃体、視覚ネットワーク領域などの領域間のFCの広範な減少につながった。
結論:
- FD患者は、AIとDLPFC間の異常なFCを示す。
- taVNSはFDの症状を効果的に緩和する。
- FDにおけるtaVNSの治療効果は、AI、中枢実行ネットワーク(CEN)、辺縁系、および視覚ネットワーク(VN)間のFCの調節を含む可能性がある。
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