呼吸頻度の調節は,Bötzinger前複合体のリズム発生神経細胞へのペプチダージックインプットによって行われる
P A Gray1, J C Rekling, C M Bocchiaro
1Department of Neurobiology, University of California Los Angeles, Box 951763, Los Angeles, CA 90095-1763, USA.
まとめ
ニューロキニン-1受容体 (NK1R) とムオピオイド受容体 (muOR) アゴニストは,プレボッツィンガー複合体 (preBötC) の内にあるニューロンに作用することによって,呼吸器リズムに影響を与えます. preBötC内の特定のニューロンタイプは,これらの受容体を発現し,呼吸の生成と調節におけるそれらの役割を示唆します.
科学分野:
- 神経科学は神経科学である.
- 呼吸器生理学 呼吸器生理学について
背景:
- プレボッツィンガー複合体 (preBötzinger Complex,preBötC) は,哺乳類における主要な呼吸リズム発生器である.
- ニューロキニン-1受容体 (NK1R) とミュオピオイド受容体 (muOR) は,呼吸制御の調節に関与しています.
研究 の 目的:
- BötC前期における呼吸器リズム生成におけるNK1RとmuORの役割を調査する.
- preBötCにおけるNK1RとmuORを発現するニューロン集団を特定する.
主な方法:
- NK1RとmuORアゴニストを哺乳類のpreBötCに直接注入する.
- アナトミック・トレーシングと免疫ヒストケミストリーは,preBötCニューロンにおける受容体分布を特定する.
主要な成果:
- NK1RおよびmuORアゴニストは,preBötC.に投与されたとき,呼吸器リズムに直接影響を及ぼしました.
- NK1R+ニューロンは,BötC.前を解剖学的に定義した.
- リトモゲネシスにとって重要な1型プレボットCニューロンは,NK1RsとmuORsを共発する.
- 2型プレボットCニューロンはNK1Rのみを発現する.
結論:
- preBötCは,呼吸器リズモゲネシスの独特な解剖学的および機能的単位です.
- NK1RとmuORを共発するpreBötCニューロンのサブポピュレーションは,呼吸リズムの主な生成体である.
- これらの受容体は,特定のニューロン集団への作用を通じて呼吸頻度を調節する.
関連する概念動画
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