Loading...
Please wait, while we are loading the content...
Similar Documents
An immunohistochemical study of copper/zinc superoxide dismutase and manganese superoxide dismutase following focal cerebral ischemia in the rat
| Content Provider | Semantic Scholar |
|---|---|
| Author | Liu, Xiao-Hong Kato, Hiroyuki Araki, Tsutomu Itoyama, Y. Kogure, Kyuya |
| Copyright Year | 1994 |
| Abstract | We investigated immunohistochemically the localization and changes of copper/zinc superoxide dismutase (CuZn-SOD) and manganese superoxide dismutase (Mn-SOD) in the rat brain following 1 h of middle cerebral artery (MCA) occlusion. In normal brain, immunoreactivity to both SODs was observed in medium-sized neurons in the striatum and in many neurons in the neocortex. Mn-SOD was predominantly stained in cortical interneurons. The immunostaining of both SODs rapidly decreased or disappeared in neurons in the lateral segment of the striatum (ischemic center) 4 h after MCA occlusion, when the neurons were degenerating. Most neurons in the neocortex (ischemic penumbra) decreased their CuZn-SOD immunoreactivity but not Mn-SOD immunoreactivity 4 h after ischemia, when only a few neurons showed histopathological changes. CuZn-SOD immunoreactivity in almost all cortical neurons disappeared 1 day after ischemia, but Mn-SOD immunoreactivity was still preserved in interneurons, when cortical neurons showed typical pathological changes. Some cortical neurons in the boundary zone between normal and infarcted areas showed intense immunostaining to both SODs and glial SOD immunoreactivity appeared after 3 and 7 days. These results suggest that early loss of the scavenging system of free radicals may lead to neuronal damage after ischemic insult, and that induced SODs in the boundary zone between the normal and infarcted areas may act as a defense mechanism against damage. |
| Starting Page | 257 |
| Ending Page | 266 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/0006-8993(94)91688-8 |
| PubMed reference number | 8050037 |
| Journal | Medline |
| Volume Number | 644 |
| Alternate Webpage(s) | https://api.elsevier.com/content/article/pii/0006899394916888 |
| Alternate Webpage(s) | https://www.sciencedirect.com/science/article/pii/0006899394916888?dgcid=api_sd_search-api-endpoint |
| Alternate Webpage(s) | https://doi.org/10.1016/0006-8993%2894%2991688-8 |
| Journal | Brain Research |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
