Histopathological and Neurobehavioral Characterization in Adult Mice Exposed to Traumatic Brain Injury.
- Author:
Ki Young OH
1
;
Dong Won CHOI
;
Moon Soon JANG
;
Ji Han LEE
;
Sang Chul KIM
;
Jung Soo PARK
;
Suk Woo LEE
;
Hoon KIM
Author Information
1. Department of Emergency Medicine, Chungbuk National University College of Medicine, Cheongju, Korea. nichekh2000@chungbuk.ac.kr
- Publication Type:Original Article
- Keywords:
Brain injuries;
Mice;
Neurobehavioral manifestations
- MeSH:
Adult*;
Animals;
Brain Injuries*;
Eosine Yellowish-(YS);
Hematoxylin;
Hindlimb Suspension;
Humans;
Male;
Mice*;
Mortality;
Neurobehavioral Manifestations;
Rotarod Performance Test;
Spatial Memory
- From:Journal of the Korean Society of Emergency Medicine
2017;28(5):457-466
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: Traumatic brain injury (TBI) is a significant cause of morbidity and mortality worldwide. Severity of the initial insult is one of the most significant factors affecting outcome following TBI. In order to investigate the mechanisms of cellular injury and develop novel therapeutic strategies for TBI, we designed a standardized animal TBI model and evaluated histological and functional outcomes according to the degree of impact severity. METHODS: Male adult C57Bl/6 mice underwent controlled cortical impact (CCI) at varying depths of deflection (1.0-2.0 mm). We performed hematoxylin and eosin staining at 7 days after recovery from TBI. Neurobehavioral characterization after TBI was analyzed by the Barnes maze test, passive avoidance test, open field test, rotarod test, tail suspension test, and light/dark test. RESULTS: We observed a graded injury response according to the degree of deflection depths tested (diameter, 3 mm; velocity, 3 m/s; and duration, 500 ms) compared to sham controls. In the Barnes maze test, the severe TBI (2 mm depth) group showed reduced spatial memory as compared with the sham and mild TBI (1 mm depth) groups at 7 days after TBI. There was a significant difference in the results of the open field test and light/dark test among the three groups. CONCLUSION: Our findings demonstrate that the graded injury responses following TBI resulted in differential histopathological and behavioral outcomes in a mouse experimental CCI model. Thus, a model of CCI with histologic/behavioral outcome analysis may offer a reliable and convenient design for preclinical TBI research involving mice.
