曲美他嗪对胆管缺血再灌注损伤大鼠模型的影响及其机制
DOI: 10.3969/j.issn.1001-5256.2022.11.021
Effect of trimetazidine on a rat model of bile duct ischemia-reperfusion injury and its mechanism
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摘要:
目的 探究曲美他嗪对大鼠缺血性胆管损伤的作用及其相关机制。 方法 雄性SD大鼠40只,随机分为假手术组(Sham组,n=10)、胆管缺血再灌注损伤组(BIRI组,n=10)、曲美他嗪预处理6 h组(TMZ-6h组,n=10)以及曲美他嗪预处理3 d组(TMZ-3d组,n=10)。缺血时间30 min,再灌注24 h后取材;HE染色病理切片观察各组胆管损伤情况,检测血清ALT、ALP、DBil水平,胆管组织内超氧化物歧化酶(SOD)酶活力和丙二醛(MDA)水平,Western Blot检测氧化应激和凋亡相关信号分子,如核因子红系2相关因子2(Nrf2)、血红素加氧酶-1(HO-1)、抗凋亡蛋白B细胞淋巴瘤-2(Bcl-2)和半胱天冬酶-3(Caspase-3)。计量资料多组间比较采用单因素方差分析,进一步两两比较采用Sidak t检验。 结果 HE染色示BIRI组大鼠胆管上皮细胞部分连续性中断、坏死脱落,TMZ-6 h组胆管组织无明显变化,TMZ-3 d组胆管上皮细胞边缘较清晰、少量坏死脱落细胞。与Sham组相比,BIRI组ALT、ALP、DBil、MDA水平均显著升高(P值均<0.05),TMZ-3 d组ALT、ALP、DBil、MDA水平与BIRI组相比均显著降低(P值均<0.05),TMZ-6 h组与BIRI组相比无明显变化(P值均>0.05)。与Sham组相比,BIRI组SOD酶活力显著下降(P<0.05),TMZ-3 d组与BIRI组相比显著增高(P<0.05),TMZ-6 h组与BIRI组相比无明显变化(P>0.05)。与Sham组相比,BIRI组Nrf2、HO-1、Caspase-3表达水平均显著升高(P值均<0.05),Bcl-2表达水平显著降低(P<0.05);TMZ-3 d组Nrf2、HO-1、Bcl-2表达水平与BIRI组相比显著增加(P值均<0.05),Caspase-3表达水平显著降低(P<0.05);TMZ-6 h组Nrf2、HO-1、Bcl-2、Caspase-3与BIRI组相比无明显变化(P值均>0.05)。 结论 曲美他嗪可降低大鼠胆管缺血再灌注损伤,其机制可能与抑制胆管细胞内氧化应激水平降低细胞凋亡有关。 -
关键词:
- 再灌注损伤 /
- 胆管 /
- 曲美他嗪 /
- 大鼠, Sprague-Dawley
Abstract:Objective To investigate the effect of trimetazidine on ischemic bile duct injury in rats and related mechanism. Methods A total of 40 male Sprague-Dawley rats were randomly divided into sham-operation group (Sham group with 10 rats), bile duct ischemia-reperfusion injury group (BIRI group with 10 rats), 6-hour trimetazidine pretreatment group (TMZ-6h group with 10 rats), and 3-day trimetazidine pretreatment group (TMZ-3d group with 10 rats). The ischemia time was 30 minutes, and samples were collected after 24 hours of reperfusion. HE staining was used to observe bile duct injury, and the serum levels of alanine aminotransferase (ALT), alkaline phosphatase (ALP), and direct bilirubin (DBil) were measured, as well as the activity of superoxide dismutase (SOD) and the level of malondialdehyde (MDA) in bile duct tissue; Western Blot was used to measure the levels of the signal molecules related to oxidative stress and apoptosis, such as nuclear factor erythroid 2-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), B-cell lymphoma-2 (Bcl-2), and caspase-3. A one-way analysis of variance was used for comparison of continuous data between multiple groups, and the Sidak t-test was used for further comparison between two groups. Results HE staining showed continuous interruption, necrosis, and exfoliation of bile duct epithelial cells in the BIRI group and no significant change in bile duct tissue in the TMZ-6h group, and in the TMZ-3d group, the bile duct epithelial cells had clear boundaries with a small amount of necrotic and exfoliated cells. Compared with the Sham group, the BIRI group had significant increases in the levels of ALT, ALP, DBil, and MDA (all P < 0.05); compared with the BIRI group, the TMZ-3d group had significant reductions in the levels of ALT, ALP, DBil, and MDA (all P < 0.05); there were no significant differences between the TMZ-6h group and the BIRI group (all P > 0.05). Compared with the Sham group, the BIRI group had a significant reduction in SOD activity (P < 0.05), the TMZ-3d group had a significant increase compared with the BIRI group (P < 0.05), and there was no significant difference between the TMZ-6h group and the BIRI group (P > 0.05). Compared with the Sham group, the BIRI group had significant increases in the expression levels of Nrf2, HO-1, and caspase-3 (all P < 0.05) and a significant reduction in the expression level of Bcl-2 (P < 0.05); compared with the BIRI group, the TMZ-3d group had significant increases in the expression levels of Nrf2, HO-1, and Bcl-2 (P < 0.05) and a significant reduction in the expression level of caspase-3 (P < 0.05); there were no significant differences in Nrf2, HO-1, Bcl-2, and caspase-3 between the TMZ-6h group and the BIRI group (all P > 0.05). Conclusion Trimetazidine can reduce bile duct ischemia-reperfusion injury in rats, possibly by inhibiting the level of oxidative stress in bile duct cells and reducing cell apoptosis. -
Key words:
- Reperfusion Injury /
- Bile Ducts /
- Trimetazidine /
- Rats, Sprague-Dawley
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表 1 各组大鼠血生化指标和胆管组织氧化应激指标比较结果
Table 1. Comparison of blood biochemical indexes and bile duct tissue oxidative stress indexes in each group
指标 Sham组 BIRI组 TMZ-6h组 TMZ-3d组 F值 P值 ALT(U/L) 35.20±4.32 431.20±22.841) 400.60±22.13 286.60±28.382) 352.7 <0.001 ALP(U/L) 81.80±7.85 452.40±31.091) 459.40±44.67 288.40±32.342) 155.2 <0.001 DBil(μmol/L) 4.06±0.73 57.21±5.261) 55.46±6.17 9.52±3.172) 216.0 <0.001 SOD(U/mg) 315.00±8.51 95.60±7.791) 92.20±10.23 187.40±11.672) 469.2 <0.001 MDA(nmol/mg) 1.96±0.41 6.50±0.581) 6.36±0.85 4.18±0.492) 50.1 <0.001 注:与Sham组比较,1)P<0.05;与BIRI组比较,2)P<0.05。ALT、ALP、DBil水平检测每组样本量为10,SOD、MDA水平检测每组样本量为5。 -
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