BAG1 and cyst: Consistent with the BAG1 mRNA levels seen in these mice, the cyst numbers detected in the sagittal sections (three sections with 16–20 μm distances between sections) of the brains of these two groups of the CD8+ T cell recipients were markedly lower than those seen in the brains of the control mice with no T cell transfer (p < 0.05, Figure 1B).