吉林大学学报(医学版) ›› 2020, Vol. 46 ›› Issue (6): 1227-1233.doi: 10.13481/j.1671-587x.20200619

• 基础研究 • 上一篇    下一篇

雷公藤内酯醇对类风湿性关节炎模型大鼠血管新生和PTEN/PI3K/AKT通路的影响

刘静,燕丽君()   

  1. 河北医科大学附属唐山工人医院风湿免疫科,河北 唐山 063000
  • 收稿日期:2020-03-15 出版日期:2020-11-28 发布日期:2022-08-24
  • 通讯作者: 燕丽君 E-mail:jingliujl888@163.com
  • 作者简介:刘 静(1986-),女,河北省迁安市人,主治医师,医学硕士,主要从事风湿免疫疾 病诊疗方面的研究。
  • 基金资助:
    河北省科技厅重点研发项目资助课题(172777146)

Effects of triptolide on angiogenesis and PTEN / PI3K / AKT pathway in model rats with rheumatoid arthritis

Jing LIU,Lijun YAN()   

  1. Department of Rheumatology,Affiliated Tangshan Workers’ Hospital,Hebei Medical University,Tangshan 063000,China
  • Received:2020-03-15 Online:2020-11-28 Published:2022-08-24
  • Contact: Lijun YAN E-mail:jingliujl888@163.com

摘要: 目的

探讨雷公藤内酯醇对类风湿性关节炎大鼠血管新生和第10号染色体缺失的磷酸酯酶及张力蛋白同源物基因/磷酸肌醇-3-激酶/蛋白激酶B(PTEN/PI3K/AKT)通路的影响,阐明雷公藤内酯醇治疗类风湿性关节炎的可能机制。

方法

将80只大鼠随机分为对照组、模型组、阳性药物组和治疗组,每组20只。采用Ⅱ型胶原(ColⅡ)诱导建立风湿性关节炎大鼠模型。阳性药物组大鼠给予双氯芬酸钠缓释片治疗,治疗组大鼠给予雷公藤内酯醇治疗。治疗后,检测各组大鼠体质量和足爪厚度,评估关节炎指数积分。HE染色检测各组大鼠关节滑膜组织病理形态表现,免疫组织化学染色测定关节滑膜组织中微血管密度(MVD)和血管内皮生长因子(VEGF)表达水平, ELISA法检测各组大鼠血清VEGF水平,Western blotting法检测各组大鼠滑膜组织中PTEN、PI3K、AKT和磷酸化-AKT(p-AKT)蛋白水平。

结果

与对照组比较,模型组大鼠体质量降低(P<0.05),足爪厚度升高(P<0.05),滑膜组织中MVD和VEGF表达水平升高(P<0.05),滑膜组织中PTEN蛋白表达水平降低(P<0.05),PI3K、AKT和p-AKT蛋白表达水平升高(P<0.05)。与模型组比较,阳性药物组和治疗组大鼠体质量升高(P<0.05),足爪厚度降低(P<0.05),滑膜组织中MVD和VEGF表达水平降低(P<0.05),滑膜组织中PTEN蛋白表达水平升高(P<0.05),PI3K、AKT和p-AKT蛋白表达水平降低(P<0.05)。与阳性药物组比较,治疗组大鼠滑膜组织中MVD和VEGF表达水平降低(P<0.05),滑膜组织中PTEN蛋白表达水平升高(P<0.05),PI3K、AKT和p-AKT蛋白表达水平降低(P<0.05)。类风湿性关节炎大鼠足爪厚度和关节炎指数与VEGF(r=0.564,r=0.492)及p-AKT(r=0.561,r=0.468)表达水平呈正相关关系(P<0.05),与PTEN(r=-0.437,r=-0.521)呈负相关关系(P<0.05);MVD与VEGF(r=0.587)、PI3K(r=0.567)、p-AKT(r=0.601)表达水平呈正相关关系(P<0.05),与PTEN水平(r=-0.502)呈负相关关系(P<0.05)。

结论

雷公藤内酯醇可抑制类风湿性关节炎大鼠血管新生和PTEN/PI3K/AKT通路激活,从而发挥对类风湿性关节炎的治疗作用。

关键词: 雷公藤内酯醇, 胶原性关节炎, 血管, 第10号染色体缺失的磷酸酯酶及张力蛋白同源物基因/磷酸肌醇-3-激酶/蛋白激酶B

Abstract:

Objective To investigate the effect of triptolide on the angiogenesis and phosphatase and tensin homolog delected on chromosome/ phosphoinositide-3-kinase / protein kinase B (PTEN / PI3K / AKT) pathway in the rats with rheumatoid arthritis,and to elucidate the possible mechanism of triptolide in the treatment of rheumatoid arthritis.

Methods

A total of 80 rats were randomly divided into control group, model group, positive drug group and treatment group;there were 20 rats in each group.The rheumatoid arthritis model was established with type Ⅱ collagen(Col Ⅱ) induction.The rats in positive drug group were treated with diclofenac sodium sustained-release tablets,and the rats in treatment group were treated with triptolide.After treatment,the body weights, paw thickness and arthritis index scores of the rats in various groups were measured;HE staining was used to determine the pathomorphology of joint synovial tissue of the rats in various groups;immunohistochemical staining was used to determine the microvessel density(MVD) of vascular endothelial growth factor (VEGF) expression level in synovial tissue of the rats in various groups; ELISA method was used to determine the serum levels of VEGF of the rats in various groups;Western blotting method was used to determine the expression levels of PTEN, PI3K, AKT and phosphorylated-AKT (p-AKT) proteins in synovial tissue of the rats in various groups.

Results

Compared with control group, the body weight of rats in model group was decreased (P<0.05), the paw thickness was increased (P<0.05), the MVD and expression level of VEGF in synovial tissue were increased (P<0.05), the expression level of PTEN protein in synovial tissue was decreased (P<0.05), and the expression levels of PI3K, AKT and p-AKT proteins were increased (P<0.05).Compared with model group, the body weights of the rats in positive drug group and treatment group were increased (P<0.05),the paw thickness was decreased (P<0.05),the MVD and the expression levels of VEGF in synovial tissue were decreased (P<0.05), the expression levels of PTEN protein were decreased (P<0.05), and the expression levels of PI3K, AKT and p-AKT proteins were decreased (P<0.05).Compared with positive drug group, the MVD and expression levels of VEGF in synovial tissue of the rats in treatment group were decreased (P<0.05), the expression level of PTEN protein in synovial tissue was increased (P<0.05), and the expression levels of PI3K, AKT and p-AKT proteins were decreased (P<0.05).The paw thickness and arthritis index of rheumatoid arthritis rats were positively correlated with VEGF(r=0.564, r =0.492) and p-AKT(r=0.561, r=0.468) (P<0.05),and negatively correlated with PTEN (r=-0.437, r=-0.521)(P<0.05);MVD was positively correlated with VEGF(r =0.587), PI3K(r =0.567), and p-AKT(r=0.601) (P<0.05), and negatively correlated with PTEN (r=-0.502)(P<0.05).

Conclusion

Triptolide can inhibit the angiogenesis and PTEN / PI3K / AKT pathway activation in the rheumatoid arthritis rats, thereby exerting its therapeutic effect on rheumatoid arthritis.

Key words: triptolide, rheumatoid arthritis, blood vessels, phosphatase and tensin homolog deleted on chromosome ten/phosphoinositide-3-kinase/protein kinase B

中图分类号: 

  • R684.3