pan-ECM: live brain extracellular matrix imaging with protein-reactive dye

Author:

Ge XiaoqianORCID,Xu Xueqi,Cai QiORCID,Xiong HejianORCID,Chen Xie,Hong Yi,Gao Xiaofei,Yao Yao,Bachoo Robert,Qin ZhenpengORCID

Abstract

AbstractThe brain extracellular matrix (ECM), consisting of proteins and glycosaminoglycans, is a critical scaffold in the development, homeostasis, and disorders of the central nervous system (CNS) and undergoes remodeling in response to environmental cues. Live imaging of brain ECM structure represents a native view of the brain ECM but, until now, remains challenging due to the lack of a robust fluorescent labeling approach. Here, we developed a pan-ECM method for labeling the entire (Greek: pan) brain ECM network by screening and delivering a protein-reactive dye into the brain. pan-ECM enables imaging of ECM compartments in live brain tissue, including the interstitial matrix, basement membrane (BM), and perineuronal nets (PNNs), and even the ECM in glioblastoma and stroke mouse brains. This approach provides access to the structure and dynamics of the ECM and enhances our understanding of the complexities of the brain ECM and its contribution to brain health and disease.

Publisher

Cold Spring Harbor Laboratory

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