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1.河北中医学院,石家庄 050200
2.河北省中医院,石家庄 050011
3.河北医科大学 第四医院,石家庄 050000
4.北京中医药大学 东直门医院,北京 100700
Received:28 June 2022,
Published Online:17 November 2022,
Published:05 April 2023
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辛鑫,吴振华,檀淼等.大黄泄浊方对慢性肾衰竭大鼠炎症及SOCS3/TLR4通路的影响[J].中国实验方剂学杂志,2023,29(07):95-104.
XIN Xin,WU Zhenhua,TAN Miao,et al.Effect of Dahuang Xiezhuo Prescription on Inflammation and SOCS3/TLR4 Pathway in Rats with Chronic Renal Failure[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(07):95-104.
辛鑫,吴振华,檀淼等.大黄泄浊方对慢性肾衰竭大鼠炎症及SOCS3/TLR4通路的影响[J].中国实验方剂学杂志,2023,29(07):95-104. DOI: 10.13422/j.cnki.syfjx.20222436.
XIN Xin,WU Zhenhua,TAN Miao,et al.Effect of Dahuang Xiezhuo Prescription on Inflammation and SOCS3/TLR4 Pathway in Rats with Chronic Renal Failure[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(07):95-104. DOI: 10.13422/j.cnki.syfjx.20222436.
目的
2
观察大黄泄浊方对慢性肾衰竭(CRF)大鼠信号传导抑制因子3(SOCS3)/Toll样受体4(TLR4)通路的干预作用,探讨其减轻肾组织炎症反应的分子机制。
方法
2
取雄性SD大鼠90只,随机留取15只为假手术组,剩余75只为造模组,行5/6肾切除术复制CRF大鼠模型,模型复制成功后,随机分为模型组,大黄泄浊方低、中、高剂量(6.825、13.65、27.3 g·kg
-1
)组、尿毒清颗粒组(2.6 g·kg
-1
),分别予相应剂量的药物灌胃,连续灌胃8周
。
给药结束后,苏木素-伊红(HE)染色及马松(Masson)染色观察大鼠肾脏组织病理形态改变;检测大鼠血肌酐(SCr)、血尿素氮(BUN)、血尿酸(UA)水平;酶联免疫吸附测定法(ELISA)检测大鼠血清中白细胞介素-6(IL-6)、肿瘤坏死因子-
α
(TNF-
α
)、C反应蛋白(CRP)含量;实时荧光定量聚合酶链式反应(Real-time PCR)检测肾组织中SOCS3和TLR4 mRNA的表达;蛋白免疫印迹法(Western blot)检测信号传导抑制因子3(SOCS3)、TLR4、核转录因子-
κ
B(NF-
κ
B)、髓样分化因子88(MyD88)蛋白的表达;免疫组化法检测NF-
κ
B、MyD88、NOD样受体蛋白3(NLRP3)、黑色素瘤缺乏因子2(AIM2)蛋白的表达。
结果
2
与假手术组比较,模型组大鼠肾组织发生明显的炎症反应,血SCr、BUN、UTP、IL-6、TNF-
α
、CRP水平明显升高(
P
<
0.05),肾组织中SOCS3蛋白及SOCS3 mRNA含量明显下调,TLR4、NF-
κ
B、MyD88、NLRP3、AIM2蛋白及TLR4 mRNA含量均明显升高(
P
<
0.05);与模型组比较,大黄泄浊方和尿毒清颗粒可明显减轻肾组织中的炎症反应,降低血SCr、BUN、UTP、IL-6、TNF-
α
、CRP的表达水平(
P
<
0.05),肾组织中SOCS3蛋白及SOCS3 mRNA含量显著上升,TLR4、NF-
κ
B、MyD88、NLRP3、AIM2蛋白及TLR4 mRNA含量均明显下降(
P
<
0.05)。
结论
2
大黄泄浊方可减少炎症因子的释放和表达,抑制炎症反应,改善肾功能,其机制可能与调控SOCS3/TLR4信号通路有关。
Objective
2
To observe the intervention effect of Dahuang Xiezhuo prescription (DHXZ) on inflammation and suppressor of cytokine signaling 3 (SOCS3)/Toll-like receptor 4 (TLR4) pathway in rats with chronic renal failure (CRF), and to explore its molecular mechanism in alleviating renal inflammatory response.
Method
2
The 90 male SD rats, 15 were randomly selected as sham group, and the remaining 75 were used as modeling group to replicate CRF rat model by 5/6 nephrectomy. After successful modeling, the rats were randomly divided into model group, DHXZ low-, medium-, high-dose groups (6.825, 13.65, 27.3 g·kg
-1
) and Niaoduqing Granules group (2.6 g·kg
-1
). The drug intervention groups received corresponding drugs by gavage for 8 consecutive weeks. After administration, hematoxylin-eosin (HE) staining and Masson staining were used to observe the morphological changes of rat renal tissue, and blood creatinine (SCr), blood urea nitrogen (BUN) and blood uric acid (UA) were tested. Enzyme-linked immunosorbent assay (ELISA) was performed to detect the serum contents of interleukin-6 (IL-6), tumor necrosis factor-
α
(TNF-
α
) and C-reactive protein (CRP). The mRNA expressions of SOCS3 and TLR4 in renal tissue were detected by Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR), and the protein expressions of SOCS3, TLR4, nuclear transcription factor (NF-
κ
B) and myeloid differentiation factor (MyD88) were detected by Western blot. Immunohistochemistry was used to determine the protein expressions of NF-
κ
B, MyD88, NOD-like receptor protein 3 (NLRP3) and melanoma deficiency factor 2 (AIM2).
Result
2
Compared with the sham group, the model group had a significant inflammatory response in renal tissue, and an increase in blood SCr, BUN, UTP, IL-6, TNF-
α
and CRP (
P
<
0.05). The protein and mRNA expressions of SOCS3 in renal tissue of rats in the model group were lower while the protein expressions of TLR4, NF-
κ
B, MyD88, NLRP3 and AIM2 and the mRNA expression of TLR4 were higher than those in the sham group (
P
<
0.05). Compared with the model group, DHXZ and Niaoduqing granules groups presented markedly reduced inflammatory response in renal tissue and decreased blood SCr, BUN, UTP, IL-6, TNF-
α
and CRP (
P
<
0.05). Additionally, DHXZ and Niaoduqing granules up-regulated the protein and mRNA expressions of SOCS3 in renal tissue while down-regulated the protein expressions of TLR4, NF-
κ
B, MyD88, NLRP3 and AIM2 and the mRNA expression of TLR4 (
P
<
0.05).
Conclusion
2
DHXZ can reduce the release and expression of inflammatory factors, inhibit the inflammatory response and improve renal function, and the mechanism may be related to the regulation of SOCS3/TLR4 signaling pathway.
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