Abstract:
:Tissue plasminogen activator is usually used for the treatment of acute ischemic stroke, but the role of endogenous tissue plasminogen activator in traumatic brain injury has been rarely reported. A rat model of traumatic brain injury was established by weight-drop method. The tissue plasminogen activator inhibitor neuroserpin (5 μL, 0.25 mg/mL) was injected into the lateral ventricle. Neurological function was assessed by neurological severity score. Neuronal and axonal injuries were assessed by hematoxylin-eosin staining and Bielschowsky silver staining. Protein level of endogenous tissue plasminogen activator was analyzed by western blot assay. Apoptotic marker cleaved caspase-3, neuronal marker neurofilament light chain, astrocyte marker glial fibrillary acidic protein and microglial marker Iba-1 were analyzed by immunohistochemical staining. Apoptotic cell types were detected by immunofluorescence double labeling. Apoptotic cells in the damaged cortex were detected by terminal deoxynucleotidyl transferase-mediated digoxigenin-dUTP-biotin nick-end labeling staining. Degenerating neurons in the damaged cortex were detected by Fluoro-Jade B staining. Expression of tissue plasminogen activator was increased at 6 hours, and peaked at 3 days after traumatic brain injury. Neuronal apoptosis and axonal injury were detected after traumatic brain injury. Moreover, neuroserpin enhanced neuronal apoptosis, neuronal injury and axonal injury, and activated microglia and astrocytes. Neuroserpin further deteriorated neurobehavioral function in rats with traumatic brain injury. Our findings confirm that inhibition of endogenous tissue plasminogen activator aggravates neuronal apoptosis and axonal injury after traumatic brain injury, and activates microglia and astrocytes. This study was approved by the Biomedical Ethics Committee of Animal Experiments of Shaanxi Province of China in June 2015.
journal_name
Neural Regen Resjournal_title
Neural regeneration researchauthors
Zhao JJ,Liu ZW,Wang B,Huang TQ,Guo D,Zhao YL,Song JNdoi
10.4103/1673-5374.266914subject
Has Abstractpub_date
2020-04-01 00:00:00pages
667-675issue
4eissn
1673-5374issn
1876-7958pii
NeuralRegenRes_2020_15_4_667_266914journal_volume
15pub_type
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journal_title:Neural regeneration research
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journal_title:Neural regeneration research
pub_type: 杂志文章
doi:10.3969/j.issn.1673-5374.2013.06.010
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doi:10.3969/j.issn.1673-5374.2013.23.011
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journal_title:Neural regeneration research
pub_type:
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pub_type: 已发布勘误
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