Differences in the protein expression levels of Trx2 and Prx3 in the hippocampal CA1 region between adult and aged gerbils following transient global cerebral ischemia

Lee,Choong Hyun; Park,Joon Ha; Cho,Jeong‑Hwi; Ahn,Ji Hyeon; Bae,Eun Joo; Won,Moo‑Ho

doi:10.3892/mmr.2015.3760

Differences in the protein expression levels of Trx2 and Prx3 in the hippocampal CA1 region between adult and aged gerbils following transient global cerebral ischemia

Authors:
- Choong Hyun Lee
- Joon Ha Park
- Jeong‑Hwi Cho
- Ji Hyeon Ahn
- Eun Joo Bae
- Moo‑Ho Won
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Affiliations: Department of Pharmacy, College of Pharmacy, Dankook University, Cheonan, South Chungcheong 330‑714, Republic of Korea, Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 200-701, Republic of Korea , Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, Gangwon 200-701, Republic of Korea, Department of Pediatrics, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Gangwon 200-702, Republic of Korea
Published online on: May 8, 2015 https://doi.org/10.3892/mmr.2015.3760
Pages: 2555-2562
Copyright: © Lee et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

The thioredoxin (Trx) and peroxiredoxin (Prx) redox system is associated with neuronal damage and neuroprotective effects via the regulation of oxidative stress in brain ischemia. In the present study, ischemia‑induced changes in the protein expression levels of Trx2 and Prx3 in the stratum pyramidale (SP) of the hippocampal CA1 region were investigated in adult and aged gerbils, subjected to 5 min of transient global cerebral ischemia, using immunohistochemistry and western blot analysis. In the adult ischemia‑group, minimal Trx2 immunoreactivity was detected in the SP 2 days after ischemia‑reperfusion. In the aged animals, the Trx2 immunoreactivity in the sham‑group was marginally lower compared with that in the adult sham‑group. In the aged ischemia‑group, Trx2 immunoreactivity in the SP was significantly higher 1, 2 and 4 days post‑ischemia, compared with that in the adult ischemia‑group and, in the 5 days post‑ischemia group, Trx2 immunoreactivity was significantly decreased in the SP. Prx3 immunoreactivity in the SP of the adult ischemia‑group was significantly decreased from 4 days after ischemia‑reperfusion. In the aged animals, Prx3 immunoreactivity in the sham‑group was also marginally lower compared with that in the adult sham‑group. Prx3 immunoreactivity in the aged ischemia‑group was also significantly higher 1, 2 and 4 days post‑ischemia, compared with the adult ischemia‑group; however, the Prx3 immunoreactivity was significantly decreased 5 days post‑ischemia. The western blot analyses revealed that the pattern of changes in the protein levels of Trx2 and Prx3 in the adult and aged hippocampal CA1 region following ischemic damage were similar to the results obtained in the immunohistochemical data. These findings indicated that cerebral ischemia lead to different protein expression levels of Trx2 and Prx3 in the hippocampal CA1 region between adult and aged gerbils, and these differences may be associated with more delayed neuronal death in the aged gerbil hippocampus following transient global cerebral ischemia.

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