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Effect of C. tubulosa nanopowder on tyrosine hydroxylase (TH) in MPP+-damaged MES23.5 cells (400×). The TH expression of MES23.5 cells by immunocytochemistry (A: negative control; B: control; C: vehicle; D: low-dose (100 μg/ml); E: middle-dose (200 μg/ml); F: high-dose (250 μg/ml)). Compare with the Vehicle: **P < 0.01. n = 3 (G).
