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Application of Two-Photon Microscopy in the Studies ofCerebral Microcirculation |
LIU Shuangshuang1, WANG Jun2, YIN Wei1, LOU Huifang1, SHEN Yi1* |
1(School of Medicine, Zhejiang university, Hangzhou 310058, China) 2(School Hospital of Zhejiang University, Hangzhou 310058, China) |
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Abstract Two-photon microscopy (TPM) is a new technology with the characteristics of strong penetrability and low photo-toxicity that breaks through the limitations of conventional light microscopy and laser confocal scanning microscopy (LSCM). Based on the two-photon absorption theory and femtosecond pulse technology, TPM provides the special advantages in studying long-term visualization of the microcirculation system in the brain of living animals. It has unique advantages to study the structure of cerebral cortex microcirculation network, blood perfusion and blood oxygen metabolism. In recent years, TPM has been developing iteratively, and its application has been expanding. TPM can be used to detect and photochemical control the blood flow signal in a single sub leptomeningeal microvascular, which opens a valuable microcirculation window for the basic and clinical research of the pathogenesis of ischemic cerebrovascular disease and Alzheimer's disease. Starting with the imaging principle, this review introduced the technological characteristics and progress of TMP, and summarized its application status and prospects from four aspects including quantifying hemodynamic changes, measuring oxygen partial pressure, detecting leukocyte-endothelial cell interaction, and establishing a stroke model, and discussed a few key questions and proposed solutions in the research field as well.
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Received: 13 October 2020
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