複製と生育を制御する下垂体ニューロンへの嗅覚インプット
Hayan Yoon1, L W Enquist, Catherine Dulac
1Howard Hughes Medical Institute, Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
Cell
|November 18, 2005
まとめ
感覚処理は生殖に影響する. この研究は,嗅覚経路ではなく,嘔吐経路が,ルテイン化ホルモン放出ホルモン (LHRH) のニューロンとマウスの交配行動に大きく影響することを明らかにしています.
科学分野:
- 神経科学は神経科学である.
- 生殖生物学 生殖生物学
- センサリーシステム センサリーシステム
背景:
- ルテイン化ホルモン放出ホルモン (LHRH) のニューロンは生殖に不可欠です.
- LHRHニューロンへの感覚インプットの理解は,生殖制御の鍵です.
研究 の 目的:
- LHRHニューロンにシナプス的に接続されたアファレント経路を特定するために.
- LHRHのニューロン活動と生殖行動の調節における嗅覚と吐口鼻系の役割を調査する.
主な方法:
- LHRH::CREマウスラインで条件付きの擬似狂犬病ウイルスの追跡技術を使用しました.
- 嗅覚機能や口鼻機能のない遺伝子組み換えマウスのニューロンの接続性を分析し,生殖行動を比較した.
主要な成果:
- LHRHニューロンへの主要な嗅覚投影経路を特定しました.
- 吐口鼻系とLHRHニューロン間のシナプス接続性は見つかりませんでした.
- 嗅覚系の欠如は,LHRHニューロンの化学感知変調と交尾行動に障害をもたらした.
- 嘔吐鼻腔系が欠けていても,これらの機能には影響はなかった.
結論:
- 嗅覚センサーニューロンは,嘔吐鼻腔系ではなく,LHRHニューロンの主要な化学センサー入力です.
- 嗅覚のインプットは,生殖行動と,感覚処理によって調節される内分泌の調節に不可欠です.
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