image: Mossy fiber sprouting in the rat hippocampal CA3 region was reduced significantly in epileptic rats at four weeks after intracerebroventricular injection of neuropeptide Y gene. view more
Credit: <i>Neural Regeneration Research</i>
Synaptic remodeling is one of the most common pathological changes after epileptic seizures. Ectopic synaptic reconstruction in the hippocampus is considered to be closely related with temporal lobe epilepsy. Mossy fiber sprouting may trigger synaptic connections or synaptic remodeling in hippocampal CA3 pyramidal cells, which could lead to the formation of excitatory synaptic circuits, thereby increasing epileptic susceptibility. Exogenous neuropeptide Y has antiepileptic effects; however, the underlying mechanism and optimal administration method for neuropeptide Y are still unresolved. Previous studies have used intracerebroventricular injection of neuropeptide Y into animal models of epilepsy. Dr. Fan Zhang and team from Hebei Medical University published a relevant study in the Neural Regeneration Research (Vol. 8, No. 17, 2013) entitled "Neuropeptide Y gene transfection inhibits post-epileptic hippocampal synaptic reconstruction". These researchers found that after intracerebroventricular injection of neuropeptide Y gene, mossy fiber sprouting in the hippocampal CA3 region of epileptic rats was significantly suppressed, hippocampal synaptophysin (p38) mRNA and protein expression were inhibited, and epileptic seizures were reduced. These findings suggest that a recombinant adeno-associated virus expression vector carrying the neuropeptide Y gene reduces mossy fiber sprouting and inhibits abnormal synaptophysin expression, thereby suppressing post-epileptic synaptic reconstruction.
Article: " Neuropeptide Y gene transfection inhibits post-epileptic hippocampal synaptic reconstruction," by Fan Zhang1, 2, Wenqing Zhao1, Wenling Li3, Changzheng Dong3, Xinying Zhang3, Jiang Wu3, Na Li3, Chuandong Liang3 (1 Graduate School, Hebei Medical University, Shijiazhuang 050011, Hebei Province, China; 2 Hebei General Hospital, Shijiazhuang 050071, Hebei Province, China; 3 Department of Neurosurgery, People's Hospital of Hebei Province, Shijiazhuang 050071, Hebei Province, China)
Zhang F, Zhao WQ, Li WL, Dong CZ, Zhang XY, Wu J, Li N, Liang CD. Neuropeptide Y gene transfection inhibits post-epileptic hippocampal synaptic reconstruction. Neural Regen Res. 2013;8(17):1597-1605.
Contact: Meng Zhao
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Journal
Neural Regeneration Research