Figure 7From: Dopamine D1 receptor-mediated NMDA receptor insertion depends on Fyn but not Src kinase pathway in prefrontal cortical neuronsFyn, but not Src, affects the surface NR2B expression after D1 receptor stimulation. (A and B) Surface biotinylation of NMDA receptors in high-density PFC neurons at 14 DIV. PFC neurons at12 DIV were transfected with Fyn siRNA for 48 h. The PFC neurons at DIV 14 were treated with DMSO (0.1%, lanes 1 and 2); SKF-81297 (10 μM, lanes 3 and 4); Fyn (A) or Src (B) knockdown PFC neurons treated with DMSO (0.1%, lanes 5 and 6); or Fyn (A) or Src (B) knockdown neurons treated with SKF-81297 (10 μM, lanes 7 and 8). After surface receptor biotinylation, 20% of the lysis supernatant was used to detect the total (T) proteins. The remaining 80% of the supernatant was incubated with NeurAvidin Agarose beads and purified as surface (S) proteins. After SDS-PAGE the proteins were immunoblotted for NR2B and β-tubulin. (C and D) Quantification of surface NR2B expression. Surface NR2B was corrected by total NR2B to calculate the surface/total ratio and the control group was set to 100% for normalization. Fyn, but not Src, knockdown appeared to be effective in blocking the surface insertion of NR2B mediated by D1 stimulation (* p < 0.05, ** p < 0.01).Back to article page