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Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage

Corrigendum in: /10.3892/etm.2024.12429
  • Authors:
    • Yueying Liu
    • Jieru Chen
    • Meifang Jin
    • Zhenhong Li
    • Tian Tian
    • Lili Li
    • Hong Ni
  • View Affiliations / Copyright

    Affiliations: Neurology Laboratory, Institute of Pediatrics, Children's Hospital of Soochow University, Suzhou, Jiangsu 215003, P.R. China
    Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 127-132
    |
    Published online on: May 10, 2018
       https://doi.org/10.3892/etm.2018.6147
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Abstract

The aim of the present study was to establish a recurrent convulsion model during the developmental stage using inhalation of flurothyl, and to observe the relationship between the changes in mitochondrial function in hippocampal neurons and hippocampal neuronal apoptosis after recurrent convulsion. A total of 36 Sprague-Dawley male rats were selected and randomly divided into the control (NS) group and recurrent-seizure (RS) group for 0, 1.5, 3, 12 and 24 h. After the last seizure the rats were subdivided with 6 animals in each group. Rats in the seizure group inhaled flurothyl repeatedly to induce status convulsivus, 30 min once daily, for 7 consecutive days, while the same operation was conducted in the control group without inhalation of flurothyl. At each time-point after the last seizure, blood was taken from the heart, followed by decapitation and immediate removal of the brain. Half of the brain tissue was immediately fixed in 10% paraformaldehyde to prepare paraffin-embedded tissues for hematoxylin and eosin (H&E) histological staining. Hippocampus was taken from the other half of the brain and stored at -80˚C. Changes in mitochondrial membrane potential (ΔΨm) in hippocampal neurons were detected by flow cytometer. Dynamic changes of mitochondrial fusion and division‑related genes, mitochondrial fusion protein 2 (Mfn2) and dynamin‑related protein 1 (Drp1), in the hippocampus after recurrent convulsion were observed using reverse transcription-polymerase chain reaction (RT-PCR)and western blot analysis. The expression of caspase-3 and cytochrome c (Cyt c) was determined by RT-PCR and western blot analysis. After successful establishment of the recurrent convulsion model in rats during developmental stage using flurothyl, H&E staining results exhibited that in the CA1 region of hippocampus in the NS group, karyopyknosis occurred in nucleus that was stained to be brown and yellow, and the expression peak of apoptotic cells mainly existed at 24 h after the last convulsion. RT-PCR and western analysis revealed that apoptosis-related gene caspase-3 expression in the RS group was elevated at 1.5 h after the last convulsion, and lasted 24 h after convulsion. Detection results of mitochondrial ΔΨm revealed a significant reduction 1.5, 3 and 12 h after convulsion in hippocampal neurons of experimental rats, which reached the trough at 12 h, and rapidly increased after 24 h. The expression of Mfn2 mRNA in the RS group was significantly lower than that in the control group, while the expression of Drp1 mRNA in RS group was distinctly higher than that in the control group. RT-PCR and western blot analysis revealed that, mitochondrial apoptosis-related gene Cyt c expression was increased at 3 h after the last convulsion, and lasted 24 h after convulsion. Correlation analysis showed that the changes in mitochondrial function were closely related to neuronal apoptosis. The results of the study show that apoptosis exists in the hippocampus of rats after recurrent convulsion, which is closely related to the changes in mitochondrial function.
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Copy and paste a formatted citation
Spandidos Publications style
Liu Y, Chen J, Jin M, Li Z, Tian T, Li L and Ni H: Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429. Exp Ther Med 16: 127-132, 2018.
APA
Liu, Y., Chen, J., Jin, M., Li, Z., Tian, T., Li, L., & Ni, H. (2018). Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429. Experimental and Therapeutic Medicine, 16, 127-132. https://doi.org/10.3892/etm.2018.6147
MLA
Liu, Y., Chen, J., Jin, M., Li, Z., Tian, T., Li, L., Ni, H."Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429". Experimental and Therapeutic Medicine 16.1 (2018): 127-132.
Chicago
Liu, Y., Chen, J., Jin, M., Li, Z., Tian, T., Li, L., Ni, H."Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429". Experimental and Therapeutic Medicine 16, no. 1 (2018): 127-132. https://doi.org/10.3892/etm.2018.6147
Copy and paste a formatted citation
x
Spandidos Publications style
Liu Y, Chen J, Jin M, Li Z, Tian T, Li L and Ni H: Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429. Exp Ther Med 16: 127-132, 2018.
APA
Liu, Y., Chen, J., Jin, M., Li, Z., Tian, T., Li, L., & Ni, H. (2018). Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429. Experimental and Therapeutic Medicine, 16, 127-132. https://doi.org/10.3892/etm.2018.6147
MLA
Liu, Y., Chen, J., Jin, M., Li, Z., Tian, T., Li, L., Ni, H."Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429". Experimental and Therapeutic Medicine 16.1 (2018): 127-132.
Chicago
Liu, Y., Chen, J., Jin, M., Li, Z., Tian, T., Li, L., Ni, H."Relationship between changes in mitochondrial function and hippocampal neuronal apoptosis after recurrent convulsion during developmental stage Corrigendum in /10.3892/etm.2024.12429". Experimental and Therapeutic Medicine 16, no. 1 (2018): 127-132. https://doi.org/10.3892/etm.2018.6147
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