Neurogenesis response of middle-aged hippocampus to acute seizure activity.
Acute Seizure (AS) activity in young adult age conspicuously modifies hippocampal neurogenesis. This is epitomized by both increased addition of new neurons to the granule cell layer (GCL) by neural stem/progenitor cells (NSCs) in the dentate subgranular zone (SGZ), and greatly enhanced numbers of n...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2012-01-01
|
| Series: | PLoS ONE |
| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22912847/?tool=EBI |
| _version_ | 1818406038174433280 |
|---|---|
| author | Ashok K Shetty Bharathi Hattiangady Muddanna S Rao Bing Shuai |
| author_facet | Ashok K Shetty Bharathi Hattiangady Muddanna S Rao Bing Shuai |
| author_sort | Ashok K Shetty |
| collection | DOAJ |
| description | Acute Seizure (AS) activity in young adult age conspicuously modifies hippocampal neurogenesis. This is epitomized by both increased addition of new neurons to the granule cell layer (GCL) by neural stem/progenitor cells (NSCs) in the dentate subgranular zone (SGZ), and greatly enhanced numbers of newly born neurons located abnormally in the dentate hilus (DH). Interestingly, AS activity in old age does not induce such changes in hippocampal neurogenesis. However, the effect of AS activity on neurogenesis in the middle-aged hippocampus is yet to be elucidated. We examined hippocampal neurogenesis in middle-aged F344 rats after a continuous AS activity for >4 hrs, induced through graded intraperitoneal injections of the kainic acid. We labeled newly born cells via daily intraperitoneal injections of the 5'-bromodeoxyuridine (BrdU) for 12 days, commencing from the day of induction of AS activity. AS activity enhanced the addition of newly born BrdU+ cells by 5.6 fold and newly born neurons (expressing both BrdU and doublecortin [DCX]) by 2.2 fold to the SGZ-GCL. Measurement of the total number of DCX+ newly born neurons also revealed a similar trend. Furthermore, AS activity increased DCX+ newly born neurons located ectopically in the DH (2.7 fold increase and 17% of total newly born neurons). This rate of ectopic migration is however considerably less than what was observed earlier for the young adult hippocampus after similar AS activity. Thus, the plasticity of hippocampal neurogenesis to AS activity in middle age is closer to its response observed in the young adult age. However, the extent of abnormal migration of newly born neurons into the DH is less than that of the young adult hippocampus after similar AS activity. These results also point out a highly divergent response of neurogenesis to AS activity between middle age and old age. |
| first_indexed | 2024-12-14T09:05:35Z |
| format | Article |
| id | doaj.art-280bd6c18b9b44cea275dd4dac9fbabc |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-14T09:05:35Z |
| publishDate | 2012-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-280bd6c18b9b44cea275dd4dac9fbabc2022-12-21T23:08:42ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-0178e4328610.1371/journal.pone.0043286Neurogenesis response of middle-aged hippocampus to acute seizure activity.Ashok K ShettyBharathi HattiangadyMuddanna S RaoBing ShuaiAcute Seizure (AS) activity in young adult age conspicuously modifies hippocampal neurogenesis. This is epitomized by both increased addition of new neurons to the granule cell layer (GCL) by neural stem/progenitor cells (NSCs) in the dentate subgranular zone (SGZ), and greatly enhanced numbers of newly born neurons located abnormally in the dentate hilus (DH). Interestingly, AS activity in old age does not induce such changes in hippocampal neurogenesis. However, the effect of AS activity on neurogenesis in the middle-aged hippocampus is yet to be elucidated. We examined hippocampal neurogenesis in middle-aged F344 rats after a continuous AS activity for >4 hrs, induced through graded intraperitoneal injections of the kainic acid. We labeled newly born cells via daily intraperitoneal injections of the 5'-bromodeoxyuridine (BrdU) for 12 days, commencing from the day of induction of AS activity. AS activity enhanced the addition of newly born BrdU+ cells by 5.6 fold and newly born neurons (expressing both BrdU and doublecortin [DCX]) by 2.2 fold to the SGZ-GCL. Measurement of the total number of DCX+ newly born neurons also revealed a similar trend. Furthermore, AS activity increased DCX+ newly born neurons located ectopically in the DH (2.7 fold increase and 17% of total newly born neurons). This rate of ectopic migration is however considerably less than what was observed earlier for the young adult hippocampus after similar AS activity. Thus, the plasticity of hippocampal neurogenesis to AS activity in middle age is closer to its response observed in the young adult age. However, the extent of abnormal migration of newly born neurons into the DH is less than that of the young adult hippocampus after similar AS activity. These results also point out a highly divergent response of neurogenesis to AS activity between middle age and old age.https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22912847/?tool=EBI |
| spellingShingle | Ashok K Shetty Bharathi Hattiangady Muddanna S Rao Bing Shuai Neurogenesis response of middle-aged hippocampus to acute seizure activity. PLoS ONE |
| title | Neurogenesis response of middle-aged hippocampus to acute seizure activity. |
| title_full | Neurogenesis response of middle-aged hippocampus to acute seizure activity. |
| title_fullStr | Neurogenesis response of middle-aged hippocampus to acute seizure activity. |
| title_full_unstemmed | Neurogenesis response of middle-aged hippocampus to acute seizure activity. |
| title_short | Neurogenesis response of middle-aged hippocampus to acute seizure activity. |
| title_sort | neurogenesis response of middle aged hippocampus to acute seizure activity |
| url | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22912847/?tool=EBI |
| work_keys_str_mv | AT ashokkshetty neurogenesisresponseofmiddleagedhippocampustoacuteseizureactivity AT bharathihattiangady neurogenesisresponseofmiddleagedhippocampustoacuteseizureactivity AT muddannasrao neurogenesisresponseofmiddleagedhippocampustoacuteseizureactivity AT bingshuai neurogenesisresponseofmiddleagedhippocampustoacuteseizureactivity |