PMID: 11920724Mar 29, 2002Paper

Long-term culture of mouse cortical neurons as a model for neuronal development, aging, and death

Journal of Neurobiology
Christian Lesuisse, Lee J Martin

Abstract

A long-term cell culture system was used to study maturation, aging, and death of cortical neurons. Mouse cortical neurons were maintained in culture in serum-free medium (Neurobasal supplemented with B27) for 60 days in vitro (DIV). The levels of several proteins were evaluated by immunoblotting to demonstrate that these neurons matured by developing dendrites and synapses and remained continuously healthy for 60 DIV. During their maturation, cortical neurons showed increased or stable protein expression of glycolytic enzyme, synaptophysin, synapsin IIa, alpha and beta synucleins, and glutamate receptors. Synaptogenesis was prominent during the first 15 days and then synaptic markers remained stable through DIV60. Very early during dendritic development at DIV3, beta-synuclein (but not alpha-synuclein) was localized at the base of dendritic growth cones identified by MAP2 and alpha-amino-3-hydroxy-5-methyl-4-isoxazole (AMPA) receptor GluR1. In mature neurons, alpha and beta synucleins colocalized in presynaptic axon terminals. Expression of N-methyl-D-aspartate (NMDA) and AMPA receptors preceded the formation of synapses. Glutamate receptors continued to be expressed strongly through DIV60. Cortical neurons aging in vitro disp...Continue Reading

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