Figure 9. Effects of PTX treatment on mitochondrial content in the aged rat brain. (A, B) CS activity in the SN and HIPP. (C, D) mtDNA copy number in the SN and HIPP. (E, F) ATP6 mRNA levels in the SN and HIPP. Data are expressed as the mean ± S.D. (n=6 rats/group). *P<0.05, **P<0.01.