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大黄酸对免疫球蛋白A肾病的改善作用及机制研究
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1 #
1*
陈杉杉 ,彭胜男 ,洪 婷(1.江西中医药大学中医学院,南昌 330004;2.江西中医药大学临床医学院,南昌
2
330004)
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2023)07-0819-07
DOI 10.6039/j.issn.1001-0408.2023.07.10
摘 要 目的 基于信号转导与转录激活因子3(STAT3)信号通路,研究大黄酸改善免疫球蛋白A肾病(IgAN)模型大鼠的作用及
机制。方法 将大鼠随机分为正常对照组、IgAN模型组和大黄酸治疗组(100 mg/kg),每组10只。IgAN模型组和大黄酸治疗组采
用牛血清白蛋白+脂多糖+四氯化碳联合法复制IgAN模型。造模第7周开始,大黄酸治疗组大鼠灌胃相应药物,正常对照组和模
型组大鼠灌胃等量生理盐水,连续 4 周。末次给药后,检测大鼠尿红细胞数、24 h 尿蛋白(24 h-UTP)以及血清中免疫球蛋白 A
(IgA)、小肠黏液中分泌型IgA(sIgA)的水平;观察大鼠肾皮质和小肠黏膜Peyer结的病理形态学变化以及肾皮质中IgA沉积情况;
检测大鼠小肠黏膜Peyer结中白细胞介素17(IL-17)、IL-6和转化生长因子β(TGF-β)的表达水平;检测Peyer结中STAT3和维甲酸
受体相关孤儿受体γt(RORγt)mRNA的表达水平;检测Peyer结中磷酸化STAT3(p-STAT3)和RORγt蛋白的表达水平。结果 与正
常对照组比较,IgAN模型组大鼠尿红细胞数、24 h-UTP以及血清中IgA、小肠黏液中sIgA水平均显著升高(P<0.01);肾皮质中肾
小体增大,肾小囊扩张,球内系膜增生、纤维化明显;小肠黏膜 Peyer 结体积和生发中心增大;肾皮质中 IgA 沉积明显;小肠黏膜
Peyer 结中 IL-17、IL-6、TGF-β、STAT3 mRNA、RORγt mRNA 以及 p-STAT3、RORγt 蛋白的表达水平均显著升高(P<0.01)。与
IgAN模型组比较,大黄酸治疗组大鼠上述指标水平均显著降低(P<0.01),肾皮质病理损伤有所改善,小肠黏膜Peyer结体积和生
发中心减小,肾皮质中IgA沉积减弱。结论 大黄酸对IgAN模型大鼠具有较好的改善作用,其作用机制可能与抑制STAT3信号通
路活性、调控小肠黏膜Peyer结内的免疫功能有关。
关键词 大黄酸;免疫球蛋白A肾病;肠黏膜;Peyer结;信号转导与转录激活因子3信号通路
Study on improvement effects and mechanism of rhein on immunoglobulin A nephropathy
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CHEN Shanshan ,PENG Shengnan ,HONG Ting(1. School of Chinese Medicine, Jiangxi University of Chinese
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Medicine, Nanchang 330004, China;2. School of Clinical Medicine, Jiangxi University of Chinese Medicine,
Nanchang 330004, China)
ABSTRACT OBJECTIVE To study the improvement effects and mechanism of rhein on immunoglobulin A nephropathy (IgAN)
model rat based on signal transducer and activator of transcription 3 (STAT3) signaling pathway. METHODS Rats were randomly
divided into normal control group, IgAN model group and rhein treatment group, with 10 rats in each group. IgAN model group
and rhein treatment group were given combination of bovine serum albumin+lipopolysaccharide+carbon tetrachloride to induce
IgAN model. Since the 7th week, rhein treatment group rats were intragastrically given relevant medicine, and normal control
group and model group rats were given equal amount of normal saline intragastrically, for consecutive 4 weeks. After the last
administration, the count of urine sediment erythrocyte, 24 h-urine total protein (UTP), the levels of immunoglobulin A (IgA) in
serum and secretory immunoglobulin A (sIgA) in intestinal mucosa were detected. The pathological changes of Peyer’s patch in
renal cortex and intestinal mucosa and IgA deposition in renal cortex were observed. The expressions of interleukin-17 (IL-17), IL-
6 and transforming growth factor β (TGF-β) in Peyer’s patch of intestinal mucosa in rats were detected. The expressions of STAT3
and related orphan receptor γt (RORγt) mRNA in Peyer’s patch were detected. The expressions of p-STAT3 and RORγt proteins in
Peyer’s patch were detected. RESULTS Compared with normal control group, the count of urine sediment erythrocyte, 24 h-UTP,
the levels of IgA in serum and sIgA in intestinal mucosa were increased significantly in IgAN model group (P<0.01); enlarged
renal corpuscles, dilated renal sacs, obvious intratubular
Δ 基金项目 江西省自然科学基金项目(No.20202BABL206028); mesangial hyperplasia and fibrosis were observed in renal
江西省教育厅科学技术研究项目(No.GJJ190630,No.191641);江西 cortex; the volume and germinal center of Peyer’s patch in
中 医药大学中西医结合一级学科(江西省双一流学科)项目(No. intestinal mucosa increased; IgA deposition of renal cortex
zxyylxk20220103)
was obvious; the expressions of IL-17, IL-6 and TGF- β in
*第一作者 硕士研究生。研究方向:自身免疫性疾病的治疗和发
病机制。E-mail:1025376860@qq.com Peyer’s patch, mRNA expressions of STAT3 and RORγt,
# 通信作者 副教授,硕士生导师,博士。研究方向:自身免疫性疾 protein expressions of p-STAT3 and RORγt were increased
病的治疗和发病机制。E-mail:3603405@qq.com significantly (P<0.01). Compared with IgAN model group,
中国药房 2023年第34卷第7期 China Pharmacy 2023 Vol. 34 No. 7 · 819 ·