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Fig. 3. Knockdown of TRPC6 impairs dendritic growth. (A) Effectiveness and specificity of TRPC6-shRNAi. The two upper blots are total lysates of hippocampal cultures transfected with the shRNAi constructs targeting rat TRPC6 (shRNA6i-1 or shRNA6i-2) and control shRNAi construct targeting firefly luciferase (pPRIME-FF3) 96 hours after transfection using antibodies against TRPC6 and tubulin. The three lower blots show total lysates of HEK293 cells transfected with rat TRPC5 or human TRPC6 and shTRPC6i-1 (targeting both rat and human TRPC6) or shTRPC6i-2 (targeting only rat TRPC6) 48 hours after transfection detected using the indicated antibodies. (B) Representative images of the neurons transfected at 3 DIV for 4 days with control vector, shTRPC6i-2, shTRPC6i-1 plus human TRPC6 or shTRPC6i-2 plus human TRPC6. Scale bar: 20 µm. (C,D) Quantification of total dendritic tips (C) and total dendritic length (D) of the neurons shown in B. **P<0.01 versus control (ctrl) or shTRPC6i-2 (shC6i-2) plus hTRPC6.