喉の損傷が痛感性飲み込み反射に及ぼす影響
Naoyuki Mitarai1, Chihiro Nakatomi2, Chia-Chien Hsu2
1Division of Physiology, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka, 803-8580, Japan; Division of Endodontics and Restorative Dentistry, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, Kitakyushu, Fukuoka, 803-8580, Japan.
Journal of oral biosciences
|February 19, 2026
まとめ
喉の損傷は,水の飲み込みを阻害するが,TRPV1経路経由でカプサイシン誘発の飲み込みを強化する. これは,痛覚反射が特異的で,TRPV1遺伝子発現の増加により,負傷後の潜在的に促進されることを示唆しています.
科学分野:
- 神経科学は神経科学である.
- 胃腸内科 胃腸内科
- 生理学 生理学とは
背景:
- 喉の損傷は,水によって引き起こされる飲み込みを損なうことが知られている.
- 痛み (ノシセプティブ) 刺激によって引き起こされる飲み込み反射に対するそのような傷害の効果はよく理解されていません.
研究 の 目的:
- 喉の損傷がノシセプティブ受容体に依存する飲み込み反射にどのように影響するかを調査する.
- これらの反応におけるTRPV1とTRPA1経路の役割を決定する.
主な方法:
- 成人オスのネズミは,内視鏡による飲み込み評価を用いて研究されました.
- 飲み込みは,水,カプサイシン (TRPV1アゴニスト),アルリルイソチオシアネート (AITC,TRPA1アゴニスト) の注入によって引き起こされました.
- 喉の損傷は,酸を用いて誘発され,関連する臓におけるTRPV1とTRPA1の遺伝子発現が分析されました.
主要な成果:
- 怪我は水に誘発された飲み込みを抑制したが,カプサイシンに誘発された飲み込みを強化し,無感覚化を減少させた.
- AITCは飲み込みの遅延を延長したが,飲み込みの数を変化させなかった.
- TRPV1遺伝子の発現は,損傷後のペトロサール/関節複合体ので著しくアップレギュレーションされた.
結論:
- ノシセプティブ刺激は,水と比較して独特の飲み込みメカニズムを活性化します.
- 喉の損傷は,TRPV1に依存した経路を通ってカプサイシンによって誘発された飲み込みを促進する可能性があります.
- 特定の神経のギャングリアにおけるTRPV1発現の増加は,これらの促進反応の根底にあるようです.
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