Activation of microglia associated with lentiviral transduction: A semiautomated method of assessment
2019
Abstract Lentiviral transduction is a powerful tool and widely used in neuroscience research to manipulate gene expression of cells. However, the injection of lentiviral vectors in the brain is not totally benign, it potentially induces focal neuroinflammation. Upon inflammation, microglial cells get activated and can induce major changes in tissue environment, which may interfere with experimental results. In the current study, two weeks after the injection of control viral construction in the dentate gyrus (DG) of rats, an activation of microglia was detected. To access the activation status, we used a fast and accurate method of phenotype detection – measurement of fractal dimension (FD). Microglial morphology is a key indicator of neuroinflammation, therefore FD of microglial cells may serve as a reliable index of inflammation status in the brain. Here we present a detailed description of image processing procedure of images of individual microglial cells. The method allows to preserve the complex structure of microglial cells and their thin processes on the output image, which is important for accurate FD assessment.
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