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1.湖南中医药大学(湖南 长沙 410208)
2.贵州中医药大学第一附属医院(贵州 贵阳 550025)
3.国家重点学科中医诊断学湖南省重点实验室(湖南 长沙 410208)
Received:03 March 2025,
Published:10 October 2025
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张宜帆,周霞辉,罗晓欣,等.基于Nrf2/HO⁃1信号通路探究纤维蛋白原过表达对冠心病血瘀证大鼠的影响及机制[J].上海中医药杂志,2025,59(10):72-79.
ZHANG Yifan,ZHOU Xiahui,LUO Xiaoxin,et al.Exploration on effect and mechanism of fibrinogen overexpression on coronary heart disease with blood stasis syndrome rats based on Nrf2/HO⁃1 signaling pathway[J].Shanghai Journal of Traditional Chinese Medicine,2025,59(10):72-79.
张宜帆,周霞辉,罗晓欣,等.基于Nrf2/HO⁃1信号通路探究纤维蛋白原过表达对冠心病血瘀证大鼠的影响及机制[J].上海中医药杂志,2025,59(10):72-79. DOI: 10.16305/j.1007-1334.2025.z20250303003.
ZHANG Yifan,ZHOU Xiahui,LUO Xiaoxin,et al.Exploration on effect and mechanism of fibrinogen overexpression on coronary heart disease with blood stasis syndrome rats based on Nrf2/HO⁃1 signaling pathway[J].Shanghai Journal of Traditional Chinese Medicine,2025,59(10):72-79. DOI: 10.16305/j.1007-1334.2025.z20250303003.
目的
2
探讨纤维蛋白原(Fib)过表达对冠心病(CHD)血瘀证大鼠的影响及其通过核红细胞2相关因子2(Nrf2)/血红素氧合酶-1(HO-1)信号通路介导血管内皮损伤的机制。
方法
2
①将36只大鼠随机分为空白(N)组(6.0 mg/kg 0.9 %氯化钠溶液)、高脂(HFD)组(6.0 mg/kg 0.9 %氯化钠溶液)、高脂+空载体低剂量[HFD
+ 腺病毒相关病毒(AAV)Low]组(8.50×10
11
vg/kg AAV)、高脂+空载体高剂量(HFD+AAV High)组(1.13×10
12
vg/kg AAV)、高脂+Fib低剂量(HFD+FIB Low)组[8.50×10
11
vg/kg纤维蛋白原腺相关病毒载体(AAV-FIB)]、高脂+Fib高剂量(HFD+FIB High)组(1.13×10
12
vg/kg AAV-FIB)。在高脂喂养的第0天及第3天尾静脉注射给予相应干预,3周后取材。酶联免疫吸附分析(ELISA)法检测Fib表达。②将30只大鼠随机分为空白(N)组(6.0 mg/kg 0.9 %氯化钠溶液)、CHD血瘀证(CHDX)组(6.0 mg/kg 0.9 %氯化钠溶液)、CHD+Fib(CHDX+FIB)组(1.13×10
12
vg/kg AAV-FIB)。采用高脂饮食联合维生素D
3
及异丙肾上腺素构建CHD血瘀证大鼠模型,并在高脂喂养的第0天及第3天尾静脉注射给予相应干预。苏木精-伊红(HE)染色评估主动脉的病理形态,并检测血脂、血液流变学指标,ELISA法检测Fib、内皮素-1(ET-1)、超氧化物歧化酶(SOD)、丙二醛(MDA)水平,Western blot法检测Nrf2、HO-1蛋白表达,免疫荧光染色法观察蛋白定位。
结果
2
①与N组、HFD组比较,HFD+FIB High组Fib表达水平升高(
P
<
0.05)。②与N组比较,CHDX组Fib表达水平升高(
P
<
0.01),总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)水平和血浆低切黏度升高(
P
<
0.05),主动脉可见明显病变,心电图ST段抬高,MDA、ET-1水平升高(
P
<
0.01),SOD水平下降(
P
<
0.01),主动脉Nrf2、HO-1蛋白表达水平升高(
P
<
0.01);与CHDX组比较,CHDX+FIB组Fib表达水平进一步升高(
P
<
0.05),TC、三酰甘油(TG)和LDL-C水平升高(
P
<
0.05),高密度脂蛋白胆固醇(HDL-C)水平降低(
P
<
0.01),血浆黏度升高(
P
<
0.05),主动脉形成粥样硬化斑块,心电图ST段抬高
>
0.1 mV,MDA、ET-1水平下降(
P
<
0.01),SOD、Nrf2、HO-1水平升高(
P
<
0.01)。
结论
2
高脂喂养可成功构建Fib过表达大鼠模型,Fib过表达提高了大鼠血脂水平和血浆黏度,从而增加了CHD血瘀证的致病性;同时其通过激活Nrf2/HO-1信号通路启动代偿机制,调节氧化应激引起的血管过度损伤。
Objective
2
To investigate the effects of fibrinogen (Fib) overexpression on rats with coronary heart disease (CHD) with blood stasis syndrome, and the its mechanism in mediating vascular endothelial injury through the nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) signaling pathway.
Methods
2
①Thirty-six rats were randomly divided into the control (N) group (6.0 mg/kg 0.9% sodium chloride solution), high-fat diet (HFD) group (6.0 mg/kg 0.9% sodium chloride
solution), high-fat+empty vector low-dose [HFD+adeno-associated virus (AAV) Low] group (8.50×10
11
vg/kg AAV), high-fat+empty vector high-dose (HFD+AAV High) group (1.13×10
12
vg/kg AAV), high-fat+Fib low-dose (HFD+FIB Low) group [8.50×10
11
vg/kg Fib-associated viral vector (AAV-FIB)],and high-fat+Fib high-dose (HFD+FIB High) group (1.13×10
12
vg/kg AAV-FIB). On day 0 and 3 of high-fat feeding, the rats received the corresponding intervention via tail vein injection, and tissue samples were collected after 3 weeks. Fib expression was detected using enzyme-linked immunosorbent assay (ELISA). ② Thirty rats were randomly divided into the blank (N) group (6.0 mg/kg 0.9% sodium chloride solution), CHD blood stasis syndrome (CHDX) group (6.0 mg/kg 0.9% sodium chloride solution), CHD+Fib (CHDX+FIB) group (1.13 × 10¹² vg/kg AAV-FIB). A CHD blood stasis rat model was established using a high-fat diet combined with vitamin D₃ and isoproterenol, and the corresponding interventions were administered via tail vein injection on day 0 and 3 of high-fat feeding. Hematoxylin-eosin (HE) staining was used to assess the pathological morphology of the aorta, and lipid levels, blood rheology, and levels of Fib, endothelin-1 (ET-1), superoxide dismutase (SOD), and malondialdehyde (MDA) were measured using ELISA. Western blot analysis was used to detect the expression of Nrf2 and HO-1 proteins, and immunofluorescence staining was used to observe protein localization.
Results
2
①Compared with the N and HFD groups, the Fib expression level increased in the HFD+FIB High group (
P<
0.05). ②Compared with the N group, the Fib expression level increased in the CHDX group (
P<
0.01), total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) levels, and plasma low-viscosity increased (
P<
0.05), obvious lesions were observed in the aorta. ST segment elevation was seen on the electrocardiogram. The MDA and ET-1
levels increased (
P<
0.01), SOD level decreased (
P<
0.01), and the protein expression levels of Nrf2 and HO-1 in the aorta increased (
P<
0.01). Compared with the CHDX group, the CHDX+FIB group showed further increased Fib expression (
P<
0.05), and the TC, triglycerides (TG), and LDL-C levels were significantly increased (
P<
0.05), the high density lipoprotein cholesterol (HDL-C) level was decreased (
P<
0.01), plasma viscosity was increased (
P<
0.05), atherosclerotic plaques formed in the aorta, ECG ST-segment elevation was
>
0.1 mV, MDA and ET-1 levels decreased (
P<
0.01), while SOD, Nrf2, and HO-1 levels increased (
P<
0.01).
Conclusions
2
A rat model of Fib overexpression can be successfully established via a high-fat diet. Fib overexpression increases the blood lipid level and plasma viscosity in rats, thereby enhancing the pathogenicity of CHD with blood stasis syndrome. Concurrently, it activates the Nrf2/HO-1 signaling pathway to initiate compensatory mechanism, regulating excessive vascular damage caused by oxidative stress.
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