Effect of cell loss in the CA3 area on hippocampal neurogenesis in chronically epileptic mice
10.7652/jdyxb201604002
- VernacularTitle:小鼠颞叶癫痫慢性期CA3区损伤对齿状回神经再生的影响
- Author:
Ming HU
;
Kun ZHU
;
Jianshui ZHANG
;
Jianxin LIU
- Publication Type:Journal Article
- Keywords:
temporal lobe epilepsy;
hippocampus;
dentate gyrus;
neurogenesis;
neuron
- From:
Journal of Xi'an Jiaotong University(Medical Sciences)
2016;37(4):473-477
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the influence of cell loss in the CA3 area on hippocampal neurogenesis in mice with temporal lobe epilepsy .Methods Newly born cells in the subgranular zone (SGZ ) of dentate gyrus were labeled by the proliferation marker bromodeoxyuridine (BrdU ) at 2 months after pilocarpine‐induced status epilepticus .Double labeling of BrdU+ NeuN was carried out to compare neuronal differentiation between type Ⅰand Ⅱ mice ,which represented partial cell loss and almost complete cell loss in the CA 3 area ,respectively .DCX and BrdU single staining were made to analyze the proliferation of progenitor cells in SGZ and the survival of the newly born cells .Results When compared with that of the type Ⅱ mice ,the number of double labeled cells of BrdU+NeuN in the subgranular zone‐granule cell layer (SGZ‐GCL) in the type Ⅰ mice increased significantly ( P<0 .05) .However ,the percentages of double labeled cells in all the BrdU + cells were found to be similar between the two groups (P>0 .05) .No significant difference in the number of DCX + cells in SGZ was found between the typeⅠ and Ⅱ mice (P>0 .05) .At 6 weeks after BrdU labeling ,more remaining BrdU+ cells were found in the SGZ‐GCL in the type Ⅰ mice when compared with their counterparts in the type Ⅱ mice (P<0 .05) .Conclusion The cell loss in the CA3 area of pilocarpine‐induced epileptic mice contributes to the declined hippocampal neurogenesis by exerting negative effects on the survival of newly born cells .
