| Home | E-Submission | Sitemap | Editorial Office |  
top_img
Journal of Korean Neurosurgical Society 2011;50(6): 481-485.
doi: https://doi.org/10.3340/jkns.2011.50.6.481
Serial Expression of Hypoxia Inducible Factor-1alpha and Neuronal Apoptosis in Hippocampus of Rats with Chronic Ischemic Brain.
Chi Ho Yu, Chang Taek Moon, Jung Hyang Sur, Young Il Chun, Won Ho Choi, Ji Young Yhee
1Department of Veterinary Pathobiology, Small Animal Tumor Diagnostic Center, College of Veterinary Medicine, Konkuk University, Seoul, Korea.
2Department of Neurosurgery, Konkuk University Medical Center, Seoul, Korea. ctmoon@kuh.ac.kr
ABSTRACT
OBJECTIVE
The purpose of this study is to investigate serial changes of hypoxia-inducible factor 1alpha (HIF-1alpha), as a key regulator of hypoxic ischemia, and apoptosis of hippocampus induced by bilateral carotid arteries occlusion (BCAO) in rats.
METHODS
Adult male Wistar rats were subjected to the permanent BCAO. The time points studied were 1, 2, 4, 8, and 12 weeks after occlusions, with n=6 animals subjected to BCAO, and n=2 to sham operation at each time point, and brains were fixed by intracardiac perfusion fixation with 4% neutral-buffered praraformaldehyde for brain section preparation. Immunohistochemistry (IHC), western blot and terminal uridine deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay were performed to evaluate HIF-1alpha expression and apoptosis.
RESULTS
In IHC and western blot, HIF-1alpha levels were found to reach the peak at the 2nd week in the hippocampus, while apoptotic neurons, in TUNEL assay, were maximal at the 4th week in the hippocampus, especially in the cornu ammonis 1 (CA1) region. HIF-1alpha levels and apoptosis were found to fluctuate during the time course.
CONCLUSION
This study showed that BCAO induces acute ischemic responses for about 4 weeks then chronic ischemia in the hippocampus. These in vivo data are the first to show the temporal sequence of apoptosis and HIF-1alpha expression.
Key Words: Bilateral carotid artery occlusion; Hippocampus; Hypoxic ischemia; Hypoxia-inducible factor 1alpha; Apoptosis
TOOLS
Full text via DOI  Full text via DOI
Download Citation  Download Citation
Share:      
METRICS
10
Crossref
13
Scopus
2,396
View
28
Download
Related article
Editorial Office
1F, 18, Heolleung-ro 569-gil, Gangnam-gu, Seoul, Republic of Korea
TEL: +82-2-525-7552   FAX: +82-2-525-7554   E-mail: office@jkns.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © Korean Neurosurgical Society.                 Developed in M2PI
Close layer