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Revealing intact neuronal circuitry in centimeter-sized formalin-fixed paraffin-embedded brain
 

Revealing intact neuronal circuitry in centimeter-sized formalin-fixed paraffin-embedded brain

Ya-Hui Lin, Li-Wen Wang, Yen-Hui Chen, Yi-Chieh Chan, Shang-Hsiu Hu, Sheng-Yan Wu, Chi-Shiun Chiang, Guan-Jie Huang, Shi-Wei Chu, Kuo-Chuan Wang, …
eLife, Vol.13, RP93212
22/05/2024
: PMC11111220
: 38775133
: WOS:001229776200001
Biology Life Sciences & Biomedicine Life Sciences & Biomedicine - Other Topics Science & Technology
Tissue-clearing and labeling techniques have revolutionized brain-wide imaging and analysis, yet their application to clinical formalin-fixed paraffin-embedded (FFPE) blocks remains challenging. We introduce HIF-Clear, a novel method for efficiently clearing and labeling centimeter-thick FFPE specimens using elevated temperature and concentrated detergents. HIF-Clear with multi-round immunolabeling reveals neuron circuitry regulating multiple neurotransmitter systems in a whole FFPE mouse brain and is able to be used as the evaluation of disease treatment efficiency. HIF-Clear also supports expansion microscopy and can be performed on a non-sectioned 15-year-old FFPE specimen, as well as a 3-month formalin-fixed mouse brain. Thus, HIF-Clear represents a feasible approach for researching archived FFPE specimens for future neuroscientific and 3D neuropathological analyses.

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url
https://doi.org/10.7554/eLife.93212
Published (Version of record)

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