Figure 6.
Tyrosine hydroxylase (TH) immunoreactivity after doxycycline induction. TH immunostaining was performed 9 weeks following intra-striatal injection of 8.0 × 109 vg of AAV2/1-V16-hGDNF. (a–d) Representative pictures of TH immunoreactivity of rats fed with unsupplemented food (a) or Dox-supplemented diet containing 0.025 (b), 0.075 (c), 0.2 (d), or 1 gr of Dox/kg during 9 weeks. Scale bar: 2 mm (e) Values represent percentage of decrease of TH immunoreactivity relative to the striatum contralateral to the viral injection. n = 6 rats/Dox dose. ***P < 0.001 versus no Dox group and ##P < 0.01 versus enhanced green fluorescent protein group). GDNF, glial cell line-derived neurotrophic factor.
