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COMPARATIVE STUDY
JOURNAL ARTICLE
Primary culture of cortical neurons, type-1 astrocytes, and microglial cells from cynomolgus monkey (Macaca fascicularis) fetuses.
Journal of Neuroscience Methods 2003 December 31
We established selective primary cultures of neurons, astrocytes, and microglial cells from cryopreserved fetal cerebral cortex of cynomolgus monkeys (Macaca fascicularis). At 14 days in serum-containing medium, the cell cultures of the fetal cerebral cortex consisted primarily of neurons, astrocytes, and floating microglial cells. At 21 days, we observed a small number of myelin basic protein (MBP)-positive oligodendrocytes. The addition of cytosine arabinoside (a selective DNA synthesis inhibitor) at 2 days in culture eliminated proliferative glial cells, allowing adequate numbers of neurons to survive selectively. A chemically defined serum-free medium successfully supported neuronal survival at a level equivalent to that supported by the serum-containing medium. Brain-derived neurotrophic factor (BDNF) significantly affected the survival of primate neurons. Glutamate induced a significant degree of neuronal cell death against primate neurons and MK-801, a selective N-methyl-D-aspartate receptor (NMDAR) antagonist, blocked cell death, which suggests that primate cortical neurons have NMDAR and the glutamate-induced cell toxicity is mediated by NMDAR. In the serum-free medium, type-1 astrocytes responded to dibutyryl cyclic AMP and showed a process-bearing morphology. The growth of type-1 astrocytes in the serum-free medium was stimulated by epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), and hydrocortisone, which are known growth factors in rat type-1 astrocytes. Cultured microglial cells expressed CD68, a monocyte marker. Macrophage-colony stimulating factor (M-CSF) stimulated microglial cell growth in the serum-free medium. These selective primary culture systems of primate cerebral cortical cells will be useful in issues involving species specificity in neuroscience.
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