Immunolabeling-compatible PEGASOS tissue clearing for high-resolution whole mouse brain imaging

Autor: Pan Gao, Matthew Rivera, Xiaoxiao Lin, Todd C. Holmes, Hu Zhao, Xiangmin Xu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Frontiers in Neural Circuits, Vol 18 (2024)
Druh dokumentu: article
ISSN: 1662-5110
DOI: 10.3389/fncir.2024.1345692
Popis: Novel brain clearing methods revolutionize imaging by increasing visualization throughout the brain at high resolution. However, combining the standard tool of immunostaining targets of interest with clearing methods has lagged behind. We integrate whole-mount immunostaining with PEGASOS tissue clearing, referred to as iPEGASOS (immunostaining-compatible PEGASOS), to address the challenge of signal quenching during clearing processes. iPEGASOS effectively enhances molecular-genetically targeted fluorescent signals that are otherwise compromised during conventional clearing procedures. Additionally, we demonstrate the utility of iPEGASOS for visualizing neurochemical markers or viral labels to augment visualization that transgenic mouse lines cannot provide. Our study encompasses three distinct applications, each showcasing the versatility and efficacy of this approach. We employ whole-mount immunostaining to enhance molecular signals in transgenic reporter mouse lines to visualize the whole-brain spatial distribution of specific cellular populations. We also significantly improve the visualization of neural circuit connections by enhancing signals from viral tracers injected into the brain. Last, we show immunostaining without genetic markers to selectively label beta-amyloid deposits in a mouse model of Alzheimer’s disease, facilitating the comprehensive whole-brain study of pathological features.
Databáze: Directory of Open Access Journals