Journal
ACS CHEMICAL NEUROSCIENCE
Volume 14, Issue 5, Pages 809-819Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acschemneuro.2c00643
Keywords
Spinal cord injury; spatiotemporal mapping; 3D imaging; genetically modified tracers
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Endothelial damage, astrogliosis, microgliosis, and neuronal degeneration are common events after spinal cord injury (SCI). Conventional techniques like 2-dimensional histology and immunohistochemistry (IHC) are used to visualize and detect these events, but advanced imaging methodologies such as two-photon imaging and in vivo chemical and fluorescent protein-expressing viral-tracers offer more advantages in terms of tissue sectioning, 3D reconstructed imaging, and minimal invasiveness. This review discusses the future development of these advanced imaging techniques to explore the fundamental mechanisms after SCI.
Endothelial damage, astrogliosis, microgliosis, and neuronal degeneration are the most common events after spinal cord injury (SCI). Studies highlighted that studying the spatiotemporal profile of these events might provide a deeper understanding of the pathophysiology of SCI. For imaging of these events, available conventional techniques such as 2-dimensional histology and immunohistochemistry (IHC) are well established and frequently used to visualize and detect the altered expression of the protein of interest involved in these events. However, the technique requires the physical sectioning of the tissue, and results are also open to misinterpretation. Currently, researchers are focusing more attention toward the advanced tools for imaging the spinal cord's various physiological and pathological parameters. The tools include two-photon imaging, light sheet fluorescence microscopy, in vivo imaging system with fluorescent probes, and in vivo chemical and fluorescent protein-expressing viral-tracers. These techniques outperform the limitations associated with conventional techniques in various aspects, such as optical sectioning of tissue, 3D reconstructed imaging, and imaging of particular planes of interest. In addition to this, these techniques are minimally invasive and less time-consuming. In this review, we will discuss the various advanced imaging methodologies that will evolve in the future to explore the fundamental mechanisms after SCI.
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