Encyclopedia of Experiments: Immunology
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Transcript
Begin with a lung tumor slice containing resident T cells.
T cells migrate through the tumor microenvironment and interact with tumor cells and stromal elements, performing immune functions.
The composition of the tumor microenvironment strongly influences T cell displacement and velocity.
Add distinct fluorescently-coupled antibodies to label T cells, tumor cells, and stromal elements in the microenvironment.
Add DAPI, which infiltrates cells with a damaged plasma membrane to stain the nucleus, enabling the visualization of necrotic regions within the tumor.
Observe the stained sample under a confocal microscope.
Using a suitable fluorescence light, select a tumor region of interest containing resident T cells. Evaluate cell viability by assessing DAPI-positive cells.
For real-time analysis, define time intervals and total recording time.
To capture z-stack images, start at a depth below labeled T cells and capture images at various time intervals.
Utilize tracking software to compare the T cell displacement length and average velocity in different tumor regions.
