Effect of ischemic preconditioning on antioxidant status in the gerbil hippocampal CA1 region after transient forebrain ischemia
Seung Min Park
Chan Woo Park
Tae-Kyeong Lee
Jeong Hwi Cho
Joon Ha Park
Jae-Chul Lee
Bai Hui Chen
Bich-Na Shin
Ji Hyeon Ahn
Hyun-Jin Tae
Myoung Cheol Shin
Taek Geun Ohk
Jun Hwi Cho
Moo-Ho Won
Soo Young Choi
In Hye Kim
摘要：Ischemic preconditioning (IPC) is a condition of sublethal transient global ischemia and exhibits neuro-protective effects against subsequent lethal ischemic insult. We, in this study, examined the neuroprotective effects of IPC and its effects on immunoreactive changes of antioxidant enzymes including superoxide dismutase (SOD) 1 and SOD2, catalase (CAT) and glutathione peroxidase (GPX) in the gerbil hippocampal CA1 region after transient forebrain ischemia. Pyramidal neurons of the stratum pyramidale (SP) in the hippocampal CA1 region of animals died 5 days after lethal transient ischemia without IPC (8.6%(ratio of remanent neurons) of the sham-operated group);however, IPC prevented the pyramidal neurons from subsequent lethal ischemic injury (92.3%(ratio of remanent neurons) of the sham-operated group). SOD1, SOD2, CAT and GPX immunoreactivities in the sham-operated animals were easily detected in pyramidal neurons in the stratum pyramidale (SP) of the hippocampal CA1 region, while all of these immunoreac-tivities were rarely detected in the stratum pyramidale at 5 days after lethal transient ischemia without IPC. Meanwhile, their immunoreactivities in the sham-operated animals with IPC were similar to (SOD1, SOD2 and CAT) or higher (GPX) than those in the sham-operated animals without IPC. Furthermore, their immunoreactivities in the stratum pyramidale of the ischemia-operated animals with IPC were steadily maintained after lethal ischemia/reperfusion. Results of western blot analysis for SOD1, SOD2, CAT and GPX were similar to immunohistochemical data. In conclusion, IPC maintained or increased the expression of antioxidant enzymes in the stratum pyramidale of the hippocampal CA1 region after subsequent lethal transient forebrain ischemia and IPC exhibited neuroprotective effects in the hippocampal CA1 region against transient forebrain ischemia.
机标关键词：neuroprotective effectsantioxidant enzymesglutathione peroxidasewestern blot analysissuperoxide dismutase
资助基金：Funding(No. NRF-2009-0093812)by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education(NRF-2014R1A1A2057013)
论文发表日期：2016-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：9( 1081-1089 )
英文信息