PKD1 and Parkinson disease: In the traction test, compared with the CTRL group, the relative traction test score was decreased in PD rats, whereas EGCG increased the relative traction test score; moreover, EGCG did not increase the relative traction test score in PD rats when CID755673 was used to inhibit the PKD1 expression and Ad-PARP-1 was used to activate the Parthanatos (Figure 2i).