New GABAergic Neurogenesis in the Hippocampal CA1 Region of a Gerbil Model of Long‐Term Survival after Transient Cerebral Ischemic Injury. (14th December 2015)

• Record Type: Journal Article
• Authors: Lee, Jae‐Chul; Park, Joon Ha; Ahn, Ji Hyeon; Kim, In Hye; Cho, Jeong Hwi; Choi, Jung Hoon; Yoo, Ki‐Yeon; Lee, Choong Hyun; Hwang, In Koo; Cho, Jun Hwi; Kwon, Young‐Guen; Kim, Young‐Myeong; Kang, Il Jun; Won, Moo‐Ho
• Is Part Of: Brain pathology. Volume 26:Number 5(2016)
• Page Start: 581
• Page End: 592
• Publication Date: 2015-12-14
• Subjects: GABAergic neuron -- hippocampal CA1 -- myelinated nerve fibers -- transient cerebral ischemia -- neurogenesis; Nervous system -- Diseases -- Periodicals; Brain -- Diseases -- Periodicals; Neurology -- Periodicals; Brain Diseases -- Periodicals; Cerveau -- Maladies -- Périodiques; Système nerveux -- Maladies -- Périodiques; Neurologie -- Périodiques; 616.805
• DOI: 10.1111/bpa.12334
• Languages: English
• ISSNs: 1015-6305

Abstract

Abstract: We investigated the probability of newly generated neurons that could survive and mature in the ischemic hippocampal CA1 region (CA1) of a gerbil model of transient cerebral ischemia. Neuronal death was shown in the stratum pyramidale (SP) from 4 days post‐ischemia, and a significant increase in NeuN‐positive ( + ) neurons was found in the SP at 180 days post‐ischemia. 5‐Bromo‐2‐deoxyuridine (BrdU) + cells were co‐stained with NeuN and glutamic decarboxylase 67 (GAD67). Brain‐derived neurotrophic factor (BDNF) immunoreactivity and protein level was shown in nonpyramidal cells from 4 days post‐ischemia, and the immunoreactivity was strong at 30 days post‐ischemia and not significantly changed until 180 days post‐ischemia. Furthermore, TrkB immunoreactivity was co‐stained with GAD67 when we examined at 180 days post‐ischemia. Myelin basic protein (MBP) + nerve fibers were reduced at 4 days post‐ischemia and maintained until 60 days post‐ischemia, and MBP immunoreactivity and levels were significantly increased at 180 days post‐ischemia. In the passive avoidance test, cognitive dysfunction was improved at 180 days post‐ischemia. These results suggest that the differentiation of neural progenitor cells into new GABAergic neurons may be promoted via BDNF in the ischemic CA1 and that the neurogenesis may partially mediate the recovery of cognitive impairments via increasing myelinated nerve fibers.