Substantia nigra A9 dopaminergic neuron

A9 dopaminergic neurons, located in the substantia nigra pars compacta, are densely packed dopamine-synthesizing cells vital for the regulation of movement. Their massive projections to the dorsolateral striatum enable functional control of voluntary motor activity. These neurons express distinct molecular markers including GIRK2 and ALDH1A1 but not calbindin (the latter distinguishes A10 subclass). In Parkinson’s disease, A9 neurons experience selective degeneration, leading to the characteristic motor deficits of the disease. Therapeutic approaches often aim to restore A9 neuron function or replace lost neurons via cell transplantation, with precise A9 subtype composition crucial for effective motor recovery. Experimental drug screening and transplantation efforts utilize iPSC-derived A9 dopaminergic neurons to advance PD research and therapy[1][2][4].

Other names

A9 dopamine neuronnigral dopaminergic neuronsubstantia nigra dopaminergic neuronSNc dopaminergic neuron

Most drugs increase dopamine availability or stimulate dopamine receptors to offset loss of these neurons[2][4]