Comparative proteomic analysis of neural stem cells between differentiating and undifferentiating to dopaminergic neuron

The neural stem cells were induced by low-level dopamine (DA). We allowed cells 72 h of differentiation before protein extraction. The global proteins of neural stem cells and dopaminergic neurons were extracted. In this study, the protein from cell lysat was rudiment separated by SDS-PAGE, and the gel strip was cut into several portions. The protein in each portion is digested by trypsin, and then the peptides mixtures were analyzed by mass spectrometry (LC-MS/MS). 839 proteins in the neural stem cells and 718 proteins in the dopaminergic neuron were identified. The nestin protein was found in the NSCs and the Sodium-dependent dopamine transporter (DA transporter)(DAT) was found in the dopaminergic neuron which was induced by low level DA. The cytoskeletal proteins rearranged after the NSCs differentiated and regulating proteins changed a lot.