Open AccessAcute histopathological responses and long-term behavioral outcomes in mice with graded controlled cortical impact injury
Author(s) -
Siyi Xu,
Min Liu,
Yang Gao,
Cao Yang,
Jingang Bao,
Yingying Lin,
Yong Wang,
Qiong Luo,
Jiyao Jiang,
Chunlong Zhong
Publication year - 2019
Publication title -
neural regeneration research/neural regeneration research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.93
H-Index - 38
eISSN - 1876-7958
pISSN - 1673-5374
DOI - 10.4103/1673-5374.250579
Subject(s) - h&e stain , morris water navigation task , medicine , hippocampus , pathology , immunohistochemistry , neuroscience , psychology
While animal models of controlled cortical impact often display short-term motor dysfunction after injury, histological examinations do not show severe cortical damage. Thus, this model requires further improvement. Mice were subjected to injury at three severities using a Pin-Point ™ -controlled cortical impact device to establish secondary brain injury mouse models. Twenty-four hours after injury, hematoxylin-eosin staining, Fluoro-Jade B histofluorescence, and immunohistochemistry were performed for brain slices. Compared to the uninjured side, we observed differences of histopathological findings, neuronal degeneration, and glial cell number in the CA2 and CA3 regions of the hippocampus on the injured side. The Morris water maze task and beam-walking test verified long-term (14-28 days) spatial learning/memory and motor balance. To conclude, the histopathological responses were positively correlated with the degree of damage, as were the long-term behavioral manifestations after controlled cortical impact. All animal procedures were approved by the Institutional Animal Care and Use Committee at Shanghai Jiao Tong University School of Medicine.