BACKGROUND AND PURPOSE: To gain a better understanding of T cell behavior after stroke, we have developed real-time in vivo brain imaging of T cells by multiphoton microscopy after middle cerebral artery occlusion.
METHODS: Adult male hCD2-GFP transgenic mice that exhibit green fluorescent protein-labeled T cells underwent permanent left distal middle cerebral artery occlusion by electrocoagulation (n=6) or sham surgery (n=6) and then multiphoton laser imaging 72 hours later.
RESULTS: Extravasated T cell number significantly increased after middle cerebral artery occlusion versus sham. Two T cell populations existed after middle cerebral artery occlusion, possibly driven by 2 T cell subpopulations; 1 had significantly lower and the other significantly higher track velocity and displacement rate than sham.
CONCLUSIONS: The different motilities and behaviors of T cells observed using our imaging approach after stroke could reveal important mechanisms of immune surveillance for future therapeutic exploitations.
- Disease Models, Animal
- Green Fluorescent Proteins
- Infarction, Middle Cerebral Artery
- Mice, Inbred C57BL
- Mice, Inbred CBA
- Mice, Transgenic
- Microscopy, Fluorescence, Multiphoton