Neuron-glia Integrity: Functional Assessment, Molecular Underpinnings, and Implication for Higher Brain Functions
Zeng, H.; Zhang, X.; Wang, W.; Shen, Z.; Dai, Z.; Yu, Z.; Xu, S.; Yan, G.; Huang, Q.; Wu, R.; Chen, X.; Xu, H.
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We developed a theory of neuron-glia integrity to underline the fact that neurons and glia cells work together in the central nervous system. Here we substantiated this theory and exemplified the implication of intact neuron-glia integrity for higher brain functions. An animal model of maternal separation with early weaning (MSEW) was applied to neonatal rats to mimic early life neglect and abuse in humans. Behavioral performance of rats was evaluated at adulthood, followed by functional assessments of neuron-glia integrity in living rats, and the demonstration of molecular underpinnings of impaired neuron-glia integrity in MSEW rats. MSEW rats showed higher levels of anxiety and explorative activity, higher glutamate level, but lower GABA level in PFC and hippocampus. MSEW procedure down-regulated protein levels of GLT-1 and ATP-, but up-regulated GAD65 and GS, while had no effects on GLAST and PAG. Moreover, it reduced the fractional anisotropy values in various brain regions, in addition to increasing NAA levels. Concurrently, MSEW led to hypomyelination in PFC as evidenced by relevant cellular and molecular changes.
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