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1.广西农业职业技术大学 食品药品工程学院,南宁 530007
2.广州中医药大学 第四临床医学院,广东 深圳 518033
覃清霞,硕士,讲师,从事中药药理研究,E-mail:qqxyifan@163.com
庞婷,硕士,讲师,从事药物分析及药理研究,E-mail:Pt7759@126.com;
周兰,博士,从事药物化学及药理研究,E-mail:zhoulan@xtbg.ac.cn
收稿日期:2023-05-04,
网络出版日期:2023-06-29,
纸质出版日期:2023-09-05
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覃清霞,何莲花,魏梅等.蔓性千斤拔素D通过TLR2/MyD88/NF-κB信号通路调控CIA大鼠炎症反应的相关机制[J].中国实验方剂学杂志,2023,29(17):134-141.
QIN Qingxia,HE Lianhua,WEI Mei,et al.Mechanism of Flemiphilippinin D Regulating Inflammatory Response in CIA Rats Through TLR2/MyD88/NF-κB Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(17):134-141.
覃清霞,何莲花,魏梅等.蔓性千斤拔素D通过TLR2/MyD88/NF-κB信号通路调控CIA大鼠炎症反应的相关机制[J].中国实验方剂学杂志,2023,29(17):134-141. DOI: 10.13422/j.cnki.syfjx.20230840.
QIN Qingxia,HE Lianhua,WEI Mei,et al.Mechanism of Flemiphilippinin D Regulating Inflammatory Response in CIA Rats Through TLR2/MyD88/NF-κB Signaling Pathway[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(17):134-141. DOI: 10.13422/j.cnki.syfjx.20230840.
目的
2
观察蔓性千斤拔素D对大鼠胶原诱导型关节炎(CIA)的作用并探讨其作用机制。
方法
2
将40只大鼠随机分为正常组、CIA组、甲氨蝶呤(MTX)组(1.35 mg·kg
-1
)、蔓性千斤拔素D低剂量组(1.5 mg·kg
-1
)及蔓性千斤拔素D高剂量组(3.0 mg·kg
-1
),每组8只,除正常组外,其余均采用Ⅱ型胶原诱导CIA模型。给药组通过灌胃给予相应药液,正常组给予相应体积生理盐水,MTX组每周1次,蔓性千斤拔素D各组每天1次,共给药28 d。实验中记录各组大鼠关节炎评分和关节肿胀度,苏木素-伊红(HE)染色观察各组大鼠踝关节病理学变化,酶联免疫吸附测定法(ELISA)检测大鼠血清炎症因子白细胞介素(IL)-1
β
、IL-6、IL-8、肿瘤坏死因子(TNF)-
α
水平,实时荧光定量聚合酶链式反应(Real-time PCR)检测Toll样受体2(TLR2)、髓样分化因子88(MyD88)、核转录因子-
κ
B(NF-
κ
B) p65 mRNA的表达量,蛋白免疫印迹法(Western blot)检测TLR2、MyD88、NF-
κ
B p65蛋白的表达量。
结果
2
与正常组比较,CIA组大鼠踝关节明显肿胀,关节炎临床评分及关节肿胀度显著升高(
P
<
0.01),踝关节组织结构明显破坏,血清炎性因子IL-1
β
、IL-6、IL-8、TNF-
α
含量显著升高(
P
<
0.01),TLR2、MyD88、NF-
κ
B p65 mRNA及蛋白表达水平显著升高(
P
<
0.01)。与CIA组比较,各给药组大鼠关节炎临床评分及关节肿胀度均明显降低(
P
<
0.05,
P
<
0.01),踝关节组织结构病理变化明显改善,血清IL-1
β
、IL-6、IL-8、TNF-
α
含量均明显降低(
P
<
0.05,
P
<
0.01),踝关节TLR2、MyD88、NF-
κ
B p65 mRNA及蛋白表达水平均明显下降(
P
<
0.05,
P
<
0.01)。
结论
2
蔓性千斤拔素D在一定程度上可降低类风湿关节炎大鼠炎性因子的表达,能起到良好的治疗作用,其作用机制可能是通过抑制TLR2/MyD88/NF-
κ
B信号通路的活化而发挥抗炎作用。
Objective
2
To observe the effect of Flemiphilippinin D on collagen-induced arthritis (CIA) in rats and explore its mechanism.
Method
2
Forty rats were randomly divided into normal group, CIA group, methotrexate (MTX) group (1.35 mg·kg
-1
), low-dose Flemiphilippinin D group (1.5 mg·kg
-1
), and high-dose Flemiphilippinin D group (3.0 mg·kg
-1
), with eight rats in each group. Except for the normal group, the CIA model was induced by type Ⅱ collagen. Each group was given corresponding liquid medicine or normal saline, once a week in the MTX group, and once a day in the Flemiphilippinin D groups for a total of 28 days. The arthritis score and joint swelling degree of rats were experimentally recorded. Pathological changes in the ankle joint of rats were observed by hematoxylin-eosin (HE) staining. Serum levels of inflammatory cytokines interleukin (IL)-1
β
, IL-6, IL-8, and tumor necrosis factor (TNF)-
α
were detected by enzyme-linked immunoabsorbent assay (ELISA), and the mRNA expression of Toll-like receptor 2 (TLR2), myeloid differentiation factor 88 (MyD88), and nuclear transcription factor-
κ
B (NF-
κ
B) p65 were detected by Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR), and the protein expressions of TLR2, MyD88, and NF-
κ
B p65 were detected by Western blot.
Result
2
Compared with the normal group, the ankle joint of the CIA group was significantly swollen, and the clinical score of arthritis and the degree of joint swelling were significantly increased (
P
<
0.01). The ankle joint tissue structure was significantly damaged, and the levels of inflammatory factors IL-1
β
, IL-6, IL-8, and TNF-
α
in serum were significantly increased (
P
<
0.01). The mRNA levels and protein levels of TLR2, MyD88, and NF-
κ
B p65 were significantly increased(
P
<
0.01). Compared with the CIA group, arthritis clinical score and joint swelling of rats in each administration group were significantly reduced (
P
<
0.05,
P
<
0.01), and the pathological changes in the ankle joint were significantly improved. The contents of serum IL-1
β
, IL-6, IL-8, and TNF-
α
were significantly decreased (
P
<
0.05,
P
<
0.01). The mRNA levels and protein levels of TLR2, MyD88, and NF-
κ
B p65 in the ankle joint were significantly decreased (
P
<
0.05,
P
<
0.01).
Conclusion
2
To a certain extent, Flemiphilippinin D can reduce the expression of inflammatory factors in rheumatoid arthritis rats and play a good therapeutic effect. It works perhaps by inhibiting the activation of the TLR2/MyD88/NF-
κ
B signaling pathway and thus shows an anti-inflammatory effect.
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