Protein-retention expansion microscopy for visualizing subcellular organelles in fixed brain tissue.
Protein-retention expansion microscopy for visualizing subcellular organelles in fixed brain tissue.
复制标题
固定脑组织中亚细胞器的蛋白质保留扩张显微镜观察。
DOI:
10.1016/j.jneumeth.2021.109285
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发表时间:
2021-09-01
影响因子:
3
通讯作者:
Farris S
中科院分区:
文献类型:
--
作者:
Campbell LA;Pannoni KE;Savory NA;Lal D;Farris S
Protein expansion microscopy (proExM) is a powerful technique that crosslinks proteins to a swellable hydrogel to physically expand and optically clear biological samples. The resulting increased resolution (~70 nm) and physical separation of labeled proteins make it an attractive tool for studying the localization of subcellular organelles in densely packed tissues, such as the brain. However, the digestion and expansion process greatly reduce fluorescence signals making it necessary to optimize ExM conditions per sample for specific end goals. Here we compare the staining and digestion conditions of existing proExM workflows to identify the optimal protocol for visualizing subcellular organelles (mitochondria and the Golgi apparatus) within reporter-labeled neurons in fixed mouse brain tissue. We found that immunostaining before proExM and using a proteinase K based digestion for 8 hours consistently resulted in robust fluorescence retention for immunolabeled subcellular organelles and genetically-encoded reporters. With these methods, we more accurately quantified mitochondria size and number and better visualized Golgi ultrastructure in individual CA2 neurons in the mouse hippocampus. This organelle optimized proExM protocol will be broadly useful for investigators interested in visualizing the spatial distribution of immunolabeled subcellular organelles in various reporter mouse lines, reducing effort, time and resources on the optimization process.
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影响因子:
48
作者:
Chen F;Wassie AT;Cote AJ;Sinha A;Alon S;Asano S;Daugharthy ER;Chang JB;Marblestone A;Church GM;Raj A;Boyden ES
通讯作者:
Boyden ES
影响因子:
3.3
作者:
Jiang N;Kim HJ;Chozinski TJ;Azpurua JE;Eaton BA;Vaughan JC;Parrish JZ
通讯作者:
Parrish JZ
DOI:
10.1126/science.1260088
发表时间:
2015-01-30
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Chen F;Tillberg PW;Boyden ES
通讯作者:
Boyden ES
影响因子:
5.5
作者:
Kunz, Tobias C.;Goetz, Ralph;Kozjak-Pavlovic, Vera
通讯作者:
Kozjak-Pavlovic, Vera
影响因子:
3.4
作者:
Cserép C;Pósfai B;Schwarcz AD;Dénes Á
通讯作者:
Dénes Á