Three-dimensional analysis of human brain cytoarchitectonics by means of a SWITCH/TDE-combined clearing method

Year: 2019

Authors: Costantini I., Mazzamuto G., Laurino A., Lazzari E., Sacconi L., Neri M., Simonetto A., Ruffilli M., Silvestri L., Pavone FS.

Autors Affiliation: European Lab Nonlinear Spect, Florence, Italy; CNR, Natl Inst Opt, Rome, Italy; Univ Florence, Florence, Italy;‎ Bioret Srl, Corte Zavattini 21, I-47522 Cesena, FC, Italy; Univ Florence, Dept Phys, Florence, Italy

Abstract: The three-dimensional reconstruction of large volumes of the human neural networks at cellular resolution is one of the biggest challenges of our days. Commonly, fine slices of samples marked with colorimetric techniques are individually imaged. This approach in addition to being time-consuming does not consider space cell organization, leading to loss of information. The aim of this work was to develop a methodology that allows analyzing the cytoarchitecture of the human brain in three dimensions at high resolution. In particular, we exploit the possibility of combining high-resolution 3D imaging techniques with clearing methodologies. We successfully integrate the SWITCH immunohistochemistry technique with the TDE clearing method to image a large volume of human brain tissue with two-photon fluorescence microscopy. In conclusion, this new approach enables to characterize large human brain specimens with high-resolution optical techniques, giving the possibility to expand the histological studies to the third dimension.

Conference title:

Edited by:Beaurepaire, E; Pavone, FS
Book Series: Proceedings of SPIE Volume: 11076
Article Number: 110760B
DOI: 10.1117/12.2527096
ISSN: 0277-786X
KeyWords: Clearing; human; brain; SWITCH; TDE; 3D imaging