Neuroprotective effects of ischemic preconditioning on hippocampal CA1 pyramidal neurons through maintaining calbindin D28k immunoreactivity following subsequent transient cerebral ischemia.

Abstract

Ischemic preconditioning elicited by a non-fatal brief occlusion of blood flow has been applied for an experimental therapeutic strategy against a subsequent fatal ischemic insult. In this study, we investigated the neuroprotective effects of ischemic preconditioning (2-minute transient cerebral ischemia) on calbindin D28k immunoreactivity in the gerbil hippocampal CA1 area following a subsequent fatal transient ischemic insult (5-minute transient cerebral ischemia). A large number of pyramidal neurons in the hippocampal CA1 area died 4 days after 5-minute transient cerebral ischemia. Ischemic preconditioning reduced the death of pyramidal neurons in the hippocampal CA1 area. Calbindin D28k immunoreactivity was greatly attenuated at 2 days after 5-minute transient cerebral ischemia and it was hardly detected at 5 days post-ischemia. Ischemic preconditioning maintained calbindin D28k immunoreactivity after transient cerebral ischemia. These findings suggest that ischemic preconditioning can attenuate transient cerebral ischemia-caused damage to the pyramidal neurons in the hippocampal CA1 area through maintaining calbindin D28k immunoreactivity.

• Authors: In Hye Kim, Yong Hwan Jeon, Tae-Kyeong Lee, Jeong Hwi Cho, Jae-Chul Lee, Joon Ha Park, Ji Hyeon Ahn, Bich-Na Shin, Yang Hee Kim, Seongkweon Hong, Bing Chun Yan, Moo-Ho Won, Yun Lyul Lee
• Journal: Neural regeneration research (Neural Regen Res) Vol. 12 Issue 6 Pg. 918-924 (Jun 2017) ISSN: 1673-5374 [Print] India
• PMID: 28761424 (Publication Type: Journal Article)