In contrast, FMT from healthy human controls partially rescued TH+ fibers in the striatum (the MPTP + HC FMT group vs. the MPTP group, P < 0.0001, Fig. 2B) and TH+ somata in the SNc (the MPTP + PD FMT group vs. the MPTP group, P < 0.0001, Fig. 2D). This evidence concerns the gene TH and Parkinson disease.