Effect of electroacupuncture pretreatment on oxidative stress response of hippocampus in rats with sepsis-associated encephalopathy and relationship with Nrf2/HO-1 signaling pathway
10.3760/cma.j.cn131073.20201112.00627
- VernacularTitle:电针预处理对脓毒症相关性脑病大鼠海马氧化应激反应的影响及其与Nrf2/HO-1信号通路的关系
- Author:
Cui LI
1
;
Lirong GONG
;
Lina WU
;
Rui MU
;
Jianbo YU
Author Information
1. 天津市南开医院麻醉科和重症医学科 300100
- Keywords:
Electric stimulation therapy;
Sepsis-associated encephalopathy;
Oxidative stress;
NF-E2-related factor 2;
Heme oxygenase-1
- From:
Chinese Journal of Anesthesiology
2021;41(6):750-753
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of electroacupuncture (EA) pretreatment on oxidative stress response of hippocampus in rats with sepsis-associated encephalopathy (SAE) and the relationship with nuclear factor E2-related factor 2 (Nrf2)/heme oxygenase-1 (Nrf2/HO-1) signaling pathway.Methods:A total of 64 healthy adult male Sprague-Dawley rats, weighing 250-300 g, were divided into 4 groups ( n=16 each) using a random number table method: sham operation group (Sham group), SAE group, SAE+ EA group and SAE plus sham EA group (SAE+ SEA group). In SAE+ EA group, Baihui, Quchi and Zusanli acupoints were stimulated for 30 min once a day for 5 consecutive days.Sepsis was induced by cecal ligation and puncture immediately after the end of the last EA.At 1 and 7 days after establishment of the model, the hippocampal malondialdehyde (MDA) and superoxide dismutase (SOD) levels were detected by enzyme-linked immunosorbent assay, the expression of hippocampal Nrf2 mRNA was detected using real-time reverse transcription polymerase chain reaction, and the expression of Nrf2 and HO-1 was determined by Western blot.At 3-7 days after establishment of the model, cognitive function was assessed using the Morris water maze test, and the escape latency and the target quadrant exploration time were recorded. Results:Compared with Sham group, the content of MDA was significantly increased and the activity of SOD was decreased at 1 and 7 days after establishment of the model, the expression of Nrf2 protein and mRNA and HO-1 was down-regulated at day 7 after establishment of the model, the escape latency was prolonged, and the target quadrant exploration time was shortened in SAE group ( P<0.05). Compared with SAE group, the content of MDA was significantly decreased and the activity of SOD was increased at 1 and 7 days after establishment of the model, the expression of Nrf2 protein and mRNA and HO-1 was up-regulated at day 7 after establishment of the model, the escape latency was shortened, and the target quadrant exploration time was prolonged in group SAE+ EA ( P<0.05), and no significant change was found in the parameters mentioned above in group SAE+ SEA ( P>0.05). Conclusion:EA pretreatment can reduce oxidative stress response of hippocampus in rats with SAE, and the mechanism may be related to activating Nrf2/HO-1 signaling pathway.
