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オキシトシンは脳内で働き社会性などを司る非常に強力な生理活性を持つペプチド性生理活性物質であるが,サイズが小さいことから蛍光標識ができず,これまで脳内分布や動態が謎に包まれてきた。われわれは新たな可視化法としてアルキンを付加するアルキンタギング法を開発し,それを適用することで,オキシトシンの「見える化」に成功した。これにより,オキシトシンの脳内での作用部位や動態などが明らかにされようとしている。
Abstract
Oxytocin, long known for its peripheral action, is a strong regulator of social behaviors through its actions in the brain. Despite such recognition, its sites of actions and dynamics within the brain tissues remain poorly understood owing to the lack of appropriate tools for its visualization and characterization. Conventional fluorescence-tagging is not applicable for small-sized bioactive molecules like oxytocin. Herein, our attempt to overcome this limitation is introduced using our novel strategy, alkyne-tagging. Small-sized alkynes would facilitate specific tagging and subsequent visualization of oxytocin within the body, which would bring forth new insights into the modes of oxytocin's action in the brain.
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