I would like to study Alzheimer and Parkinson's disease's for oxidative stress but I don't know which cell lines are suitable for it. Can anyone please guide me? Thanks for answers in advance.
You can try using differentiated SH-SY5Y cells as a model of dopaminergic neurons. It is often used for studies on Parkinson's disease. Very recent review can be found here:
For Alzheimer's disease, you could differentiate human neuroblastoma cell line IMR-32 with BrdU (plus, if you wish, dibutyryl-cAMP). These cells get differentiated into cholinergic-like neurons.
some strains of PC 12 can be differentiated by BGF or bFGF and produce catecholamine, they respond to oxidative stress and thus may be considered as a model neuronal line and as a model to study some aspects of Parkinson's disease.