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1.航空总医院,北京 100012
2.甘肃中医药大学针灸推拿学院,兰州 730000
3.甘肃中医药大学附属医院郑氏针灸科,兰州 730000
Received:11 January 2026,
Revised:2026-03-08,
Online First:07 July 2026,
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苏成红,杜小正,刘强,等.基于TLR4/MyD88/MAPK信号通路介导的滑膜细胞自噬探究热补针法治疗类风湿关节炎的抗炎机制[J].针刺研究,XXXX,XX(XX):1-9.
Su Chenghong,Du Xiaozheng,Liu Qiang,et al.Exploration on the anti-inflammatory mechanism of heat-reinforcing acupuncture in the treatment of rheumatoid arthritis from the perspective of synoviocyte autophagy mediated by TLR4/MyD88/MAPK signaling pathway[J].Acupuncture Research,
苏成红,杜小正,刘强,等.基于TLR4/MyD88/MAPK信号通路介导的滑膜细胞自噬探究热补针法治疗类风湿关节炎的抗炎机制[J].针刺研究,XXXX,XX(XX):1-9. DOI: 10.13702/j.1000-0607.20260030.
Su Chenghong,Du Xiaozheng,Liu Qiang,et al.Exploration on the anti-inflammatory mechanism of heat-reinforcing acupuncture in the treatment of rheumatoid arthritis from the perspective of synoviocyte autophagy mediated by TLR4/MyD88/MAPK signaling pathway[J].Acupuncture Research, DOI:10.13702/j.1000⁃0607.20260030.
目的
2
观察热补针法对类风湿关节炎(RA)寒证模型家兔膝关节滑膜组织自噬活性及Toll样受体4(TLR4)/髓样分化因子88(MyD88)/丝裂原活化蛋白激酶(MAPK)信号通路的影响,探究热补针法治疗RA抗炎机制。
方法
2
40只新西兰家兔随机分为正常组、模型组、瑞沙托维(TAK-242)(简称“TAK-242组”)、热补针法组(简称“热补组”)及脂多糖(LPS)+热补针法组(简称“LPS+热补组”),每组8只。采用弗氏完全佐剂及卵蛋白混合溶液注射联合低温冷冻法建立RA寒证模型。热补组取“足三里”施热补针法操作,留针30 min,1次/d,干预14次;TAK-242组耳缘静脉注射TAK-242(0.75 mg/kg),隔日1次,共7次;LPS+热补组先耳缘静脉注射LPS(0.25 mg/kg),注射30 min后施热补针法干预,隔日1次,共7次。干预结束后,测量家兔膝关节周径和痛阈;HE染色检测家兔膝关节滑膜组织病理形态;透射电镜观察滑膜细胞自噬小体;Western blot法检测滑膜组织自噬相关蛋白5(Atg5)、Unc-51样自噬激活激酶1(ULK1)、微管相关蛋白轻链3(LC3)、自噬相关蛋白Beclin-1、TLR4、MyD88、细胞外信号调节激酶1/2(ERK1/2)、c-Jun氨基末端激酶(JNK)及p38MAPK蛋白的表达。
结果
2
与正常组比较,模型组家兔膝关节周径增加(
P
<
0.05)、痛阈降低(
P
<
0.05),滑膜组织ULK1、LC3Ⅱ/Ⅰ、Atg5、Beclin-1蛋白表达降低(
P
<
0.05),TLR4、MyD88、ERK1/2、JNK、p38MAPK蛋白表达升高(
P
<
0.05)。与模型组比较,TAK-242组、热补组膝关节周径缩小(
P
<
0.05),痛阈增高(
P
<
0.05),滑膜组织Atg5、ULK1、LC3Ⅱ/Ⅰ、Beclin-1蛋白表达升高(
P
<
0.05),TLR4、MyD88、ERK1/2、JNK、p38MAPK蛋白表达降低(
P
<
0.05)。与LPS+热补组比较,热补组膝关节周径缩小(
P
<
0.05),痛阈升高(
P
<
0.05),滑膜组织Atg5、ULK1、LC3Ⅱ/Ⅰ、Beclin-1蛋白表达升高(
P
<
0.05),TLR4、MyD88、ERK1/2、JNK、p38MAPK蛋白表达降低(
P
<
0.05)。
结论
2
热补针法可减轻RA关节滑膜炎性反应,其机制与抑制滑膜组织TLR4/MyD88/MAPK通路从而增强滑膜细胞自噬活性有关。
Objective
2
To observe the effects of heat-reinforcing acupuncture on autophagic activity and the Toll-like receptor 4 (TLR4)/myeloid differentiation primary response protein 88 (MyD88)/mitogen-activated protein kinase (MAPK) signaling pathway in knee synovial tissue of cold-syndrome rabbit models with rheumatoid arthritis (RA), so as to explore the anti-inflammatory mechanism of heat-reinforcing acupuncture against RA.
Methods
2
Forty New Zealand rabbits were randomly divided into a normal group, a model group, a resatorvid (TAK-242) group (abbreviated as TAK-242 group), a heat-reinforcing acupuncture group (abbreviated as heat-reinforcing group), and a lipopolysaccharide (LPS) + heat-reinforcing acupuncture group (abbreviated as LPS + heat-reinforcing group), with 8 rabbits in each group. The cold-syndrome RA model was established by combined injection of complete Freund’s adjuvant and ovalbumin mixed solution plus low-temperature freezing treatment. For the heat-reinforcing group, heat-reinforcing acupuncture manipulation was performed at “Zusanli” (ST36) with needle retention for 30 min once a day for 14 consecutive interventions. The TAK-242 group received auricular vein injection of TAK-242 (0.75 mg/kg) once every other day for a total of 7 injections. For the LPS + heat-reinforcing group, LPS (0.25 mg/kg) was injected via the auricular vein, and heat-reinforcing acupuncture intervention was conducted 30 min after LPS injection once every other day for 7 times in total. After all interventions, HE staining was adopted to detect the pathological morphology of rabbit knee synovial tissue; transmission electron microscopy was used to observe autophagosomes in synoviocytes; Western blot was applied to detect the protein expression levels of autophagy-related 5 (Atg5), unc-51-like autophagy activating kinase 1 (ULK1), microtubule-associated protein light chain 3 (LC3), autophagy-related protein Beclin-1, TLR4, MyD88, extracellular signal-regulated kinase 1/2 (ERK1/2), c-Jun N-terminal kinase (JNK), and p38MAPK in synovial tissue.
Results
2
Compared with the normal group, the model group exhibited increased knee joint circumference (
P
<
0.05), decreased pain threshold (
P
<
0.05), down-regulated protein expression of ULK1, LC3Ⅱ/Ⅰ, Atg5 and Beclin-1 in synovial tissue(
P
<
0.05), as well as up-regulated protein expression of TLR4, MyD88, ERK1/2, JNK and p38MAPK (
P
<
0.05). Compared with the model group, the TAK-242 group and heat-reinforcing group showed reduced knee joint cir
cumference (
P
<
0.05), elevated pain threshold (
P
<
0.05), up-regulated protein expression of Atg5, ULK1, LC3Ⅱ/Ⅰ and Beclin-1 in synovial tissue(
P
<
0.05), and down-regulated protein expression of TLR4, MyD88, ERK1/2, JNK and p38MAPK (
P
<
0.05). Compared with the LPS + heat-reinforcing group, the heat-reinforcing group presented smaller knee joint circumference (
P
<
0.05), higher pain threshold (
P
<
0.05), higher protein expression of Atg5, ULK1, LC3Ⅱ/Ⅰ and Beclin-1 in synovial tissue(
P
<
0.05), and lower protein expression of TLR4, MyD88, ERK1/2, JNK and p38MAPK (
P
<
0.05).
Conclusion
2
Heat-reinforcing acupuncture can alleviate synovial inflammatory response in RA joints, and its mechanism is associated with inhibiting the TLR4/MyD88/MAPK pathway in synovial tissue and thereby enhancing autophagic activity of synoviocytes.
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