窒素酸化物は,抑制性非アドレナergic非コレナergic神経伝達物質として使用されます
H Bult1, G E Boeckxstaens, P A Pelckmans
1Division of Pharmacology, Faculty of Medicine, University of Antwerp (UIA), Wilrijk, Belgium.
Nature
|May 24, 1990
まとめ
研究者らは,オキシド窒素 (NO) を,犬のイレオコロニック交差点における抑制性非アドレナergic非コレナergic (NANC) 神経によって放出される神経伝達物質として特定しました. この発見は,NO NOを裏付けるものである.
科学分野:
- 神経科学は神経科学である.
- 胃腸内科 胃腸内科
- 薬理学 薬理学とは
背景:
- 阻害性非アドレナergic非コレナergic (NANC) 神経は,胃腸管の調節に決定的な役割を果たします.
- NANCの神経活動に起因する特定の神経伝達物質は,依然として議論の対象となっている.
- 窒素酸化物 (NO) は,潜在的なNANC神経伝達物質として仮説化されているが,神経刺激時に放出される直接的な証拠は欠けていた.
研究 の 目的:
- 犬のイレオコロニック交差点におけるNANC神経によって放出された神経伝達物質のアイデンティティを調査する.
- これらの神経を刺激すると窒素酸化物 (NO) の放出に関する直接的な証拠を提供するためです.
主な方法:
- 刺激された犬のイレオコロニック交差点NANC神経から放出された血管リラックス剤を検出するために,スーパーフュージョンバイオアッセイを使用しました.
- 組織選択性,化学的安定性,特定の作用因子 (スーパーオキシドアニオン,ヘモグロビン) による無活性化など,放出された因子の性質を特徴づけた.
- NG-ニトロ-L-アルギニン (L-NNA) とL-アルギニンの因子の活性に対する影響を評価した.
主要な成果:
- 犬のイレオコロニック交差点NANC神経を刺激すると,伝達可能な血管リラックス剤因子の放出が実証されました.
- この因子の特徴は,その不安定性,スーパーオキシードアニオンとヘモグロビンによる無活性化,L-NNAとL-アルギニンによる調節など,酸化窒素 (NO) と一致していた.
- NG-ニトロ-L-アルギニン (L-NNA) は因子の活性を抑制し,L-アルギニンはそれを強化した.
結論:
- 窒素酸化物 (NO) は,犬のイレオコロニック交差点における抑制性非アドレナergic非コレナergic (NANC) 神経によって放出される生物学的媒介体として識別されています.
- この研究は,消化管の自律的内化における神経伝達物質としてのNOの役割を支持する直接的な証拠を提供します.
- この発見は,NANCの神経機能と腸内における神経伝達に関する理解を深める.
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