Figure 2.

Silver staining on sections of mouse duodenum according to the Bilshovsky method modified by Sukhanov and Vakulin (2002) [34]: after deparaffinization of paraffin sections glued to the slides, they are repeatedly fixed in warm formalin and then treated with silver nitrate with heating. The neuronal fibrillar system is evidenced in control animals (A). The staining is less evident and interrupted in animals treated with the parkinsonian neurotoxin MPTP (B). Densitometric analysis showed a reduction in silver staining of about 30% following MPTP. These unpublished preliminary data were obtained in animals treated according to the experimental protocol previously published [11]. Scale bar = 70 μm.