A rapid optical clearing protocol using 2,2'-thiodiethanol for microscopic observation of fixed mouse brain.
A rapid optical clearing protocol using 2,2'-thiodiethanol for microscopic observation of fixed mouse brain.
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使用2,2'-硫代二乙醇的快速光学清除方案,用于对固定小鼠脑的微观观察。
DOI:
10.1371/journal.pone.0116280
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Nemoto T
中科院分区:
文献类型:
--
作者:
Aoyagi Y;Kawakami R;Osanai H;Hibi T;Nemoto T
Elucidation of neural circuit functions requires visualization of the fine structure of neurons in the inner regions of thick brain specimens. However, the tissue penetration depth of laser scanning microscopy is limited by light scattering and/or absorption by the tissue. Recently, several optical clearing reagents have been proposed for visualization in fixed specimens. However, they require complicated protocols or long treatment times. Here we report the effects of 2,2′-thiodiethanol (TDE) solutions as an optical clearing reagent for fixed mouse brains expressing a yellow fluorescent protein. Immersion of fixed brains in TDE solutions rapidly (within 30 min in the case of 400-µm-thick fixed brain slices) increased their transparency and enhanced the penetration depth in both confocal and two-photon microscopy. In addition, we succeeded in visualizing dendritic spines along single dendrites at deep positions in fixed thick brain slices. These results suggest that our proposed protocol using TDE solution is a rapid and useful method for optical clearing of fixed specimens expressing fluorescent proteins.
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