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1.河北中医学院,石家庄 050200
2.河北中医学院 第一附属医院,石家庄 050011
3.河北医科大学 第四医院,石家庄 050000
毛竞宇,在读博士,从事中西医结合肾病研究工作,E-mail:1909628690@qq.com
檀金川,教授,博士生导师,从事中西医结合肾病研究工作,E-mail:1955981973@qq.com
收稿日期:2021-07-25,
网络出版日期:2021-10-29,
纸质出版日期:2022-01-20
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毛竞宇,高飞,张欣欣等.益肾通络方对MN大鼠miR-514a-5p/TNFSF15信号通路的影响及机制[J].中国实验方剂学杂志,2022,28(02):121-130.
MAO Jing-yu,GAO Fei,ZHANG Xin-xin,et al.Effect and Mechanism of Yishen Tongluo Prescription on miR-514a-5p/TNFSF15 Signaling Pathway in MN Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(02):121-130.
毛竞宇,高飞,张欣欣等.益肾通络方对MN大鼠miR-514a-5p/TNFSF15信号通路的影响及机制[J].中国实验方剂学杂志,2022,28(02):121-130. DOI: 10.13422/j.cnki.syfjx.20212407.
MAO Jing-yu,GAO Fei,ZHANG Xin-xin,et al.Effect and Mechanism of Yishen Tongluo Prescription on miR-514a-5p/TNFSF15 Signaling Pathway in MN Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(02):121-130. DOI: 10.13422/j.cnki.syfjx.20212407.
目的
2
基于miR-514a-5p/肿瘤坏死因子超家族成员15(TNFSF15)信号通路探讨益肾通络方抑制膜性肾病(MN)大鼠肾小球足细胞凋亡的分子机制。
方法
2
80只SD大鼠采用预免疫和尾静脉注射阳离子化牛血清白蛋白(C-BSA)的方法建立MN大鼠模型,并使造模成功的MN大鼠随机分为模型组,益肾通络方高、中、低剂量组(26.44,13.22,6.61 g·kg
-1
)和贝那普利组(10 mg·kg
-1
),每组各10只,取健康大鼠20只作为正常组,各组分别予对应药物灌胃,每日1次,连续干预4周。给药结束后,实时荧光定量聚合酶链式反应(Real-time PCR)检测大鼠肾组织中miR-514a-5p及TNFSF15 mRNA表达水平;免疫组化(IHC)检测大鼠肾组织中足细胞标志蛋白足细胞裂孔膜蛋白(Nephrin),膜蛋白(Podocin),足萼蛋白(Podocalyxin),突触足蛋白(Synaptopodin),TNFSF15及足细胞凋亡相关蛋白B细胞淋巴瘤-2(Bcl-2)相关X蛋白(Bax),Bcl-2关联死亡启动子重组蛋白(BAD),大分子B细胞淋巴瘤(Bcl-XL)的表达水平;蛋白免疫印迹法(Western blot)检测大鼠肾组织中TNFSF15,Bax,BAD,Bcl-2,Bcl-XL的表达水平;原位末端标记法(TUNNEL)检测大鼠肾组织细胞凋亡率。
结果
2
与正常组比较,模型组大鼠肾组织中miR-514a-5p水平明显降低(
P
<
0.05),TNFSF15 mRNA水平明显升高(
P
<
0.05);足细胞标志蛋白Nephrin,Podocin,Podocalyxin,Synaptopodin表达明显降低(
P
<
0.05);TNFSF15,Bax,BAD蛋白表达水平明显升高(
P
<
0.05),Bcl-2,Bcl-XL蛋白表达水平明显降低(
P
<
0.05);凋亡细胞明显增多(
P
<
0.05)。与模型组比较,益肾通络方各剂量组和贝那普利大鼠肾组织中miR-514a-5p水平明显升高(
P
<
0.05),TNFSF15 mRNA水平明显降低(
P
<
0.05);足细胞标志蛋白Nephrin,Podocin,Podocalyxin,Synaptopodin表达明显升高(
P
<
0.05);TNFSF15,Bax,BAD蛋白表达水平明显降低(
P
<
0.05),Bcl-2,Bcl-XL蛋白表达水平明显升高(
P
<
0.05);凋亡细胞明显减少(
P
<
0.05)。
结论
2
益肾通络方可能通过miR-514a-5p/TNFSF15信号通路,减轻大鼠肾组织足细胞凋亡,缓解MN大鼠肾损伤。
Objective
2
To explore the molecular mechanism of Yishen Tongluo prescription in inhibiting the apoptosis of glomerular podocytes in rats with membranous nephropathy (MN) based on the miR-514a-5p/tumor necrosis factor superfamily member 15 (TNFSF15) signaling pathway.
Method
2
Eighty SD rats were pre-immunized and injected with cationized bovine serum albumin (C-BSA) into the tail vein for inducing MN, and the successfully modeled MN rats were randomly divided into the model group, high-, middle-, and low-dose (26.44, 13.22, 6.61 g·kg
-1
) Yishen Tongluo prescription groups, and benazepril (10 mg·kg
-1
) group, with 10 rats in each group, and another 20 healthy rats were classified into the normal group. Rats in each group were gavaged with the corresponding drugs, once a day, for four successive weeks. After the administration, the 24-hour urine total protein (UTP) level, serum total cholesterol (TC), triglyceride (TG), albumin (ALB), creatinine (SCr), and urea nitrogen (BUN) levels were measured. The miR-514a-5p and TNFSF15 mRNA expression levels in the rat kidney tissue were detected by real-time fluorescence quantitative polymerase chain reaction (Real-time PCR), and the expression levels of podocyte marker proteins Nephrin, Podocin, Podocalyxin, Synaptopodin, TNFSF15, and podocyte apoptosis-related proteins B lymphocytoma-2 (Bcl-2)-related X protein (Bax), Bcl-2-associated death promoter (BAD) protein, and B-cell lymphoma-extra large (Bcl-XL) by immunohistochemistry (IHC). Western blot was used to detect the expression levels of TNFSF15, Bax, BAD, Bcl-2, and BCL-XL in the rat kidney tissue. The apoptosis rate of rat kidney tissue was measured using the in situ end labeling method (Tunnel).
Result
2
Compared with the normal group, the level of miR-514a-5p in the kidney tissue was significantly reduced (
P
<
0.05), and the TNFSF15 mRNA expression was significantly increased (
P
<
0.05). The expression levels of podocyte marker proteins Nephrin, Podocin, Podocalyxin, and Synaptopodin were down-regulated (
P
<
0.05). The protein expression levels of TNFSF15, Bax, and BAD were increased (
P
<
0.05), whereas the Bcl-2 and Bcl-XL protein expression levels were decreased (
P
<
0.05). The number of apoptotic cells diminished significantly (
P
<
0.05). Compared with the model group, the level of miR-514a-5p in the kidney tissue was significantly increased (
P
<
0.05), while the level of TNFSF15 mRNA was significantly decreased (
P
<
0.05). The expression levels of podocyte marker proteins Nephrin, Podocin, podocalyxin, and Synaptopodin were up-regulated (
P
<
0.05), whereas the TNFSF15, Bax, and BAD protein expression levels were down-regulated (
P
<
0.05). Bcl-2 and Bcl-XL protein expression levels rose (
P
<
0.05). The number of apoptotic cells significantly decreased (
P
<
0.05).
Conclusion
2
Yishen Tongluo prescription reduces the apoptosis of rat kidney podocytes and alleviates the kidney injury of MN rats through the miR-514a-5p/TNFSF15 signaling pathway.
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