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陕西中医药大学,陕西 咸阳 712046
Received:21 April 2020,
Published Online:30 July 2020,
Published:20 December 2020
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黄笛,谭颖颖,张琪等.芪蛭真武汤改善单侧输尿管梗阻大鼠肾间质纤维化及其机制[J].中国实验方剂学杂志,2020,26(24):45-52.
HUANG Di,TAN Ying-ying,ZHANG Qi,et al.Effect of Qizhi Zhenwutang in Improving Renal Interstitial Fibrosis and Its Mechanism on Unilateral Ureteral Obstruction in Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(24):45-52.
黄笛,谭颖颖,张琪等.芪蛭真武汤改善单侧输尿管梗阻大鼠肾间质纤维化及其机制[J].中国实验方剂学杂志,2020,26(24):45-52. DOI: 10.13422/j.cnki.syfjx.20201878.
HUANG Di,TAN Ying-ying,ZHANG Qi,et al.Effect of Qizhi Zhenwutang in Improving Renal Interstitial Fibrosis and Its Mechanism on Unilateral Ureteral Obstruction in Rats[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(24):45-52. DOI: 10.13422/j.cnki.syfjx.20201878.
目的
2
探讨芪蛭真武汤对单侧输尿管结扎(UUO)大鼠肾间质纤维化的影响,及对转化生长因子-
β
1
(TGF-
β
1
)/Smads和氧化应激反应的作用。
方法
2
将30只雄性SD大鼠,随机分为假手术组、模型组、芪蛭真武汤高剂量组、芪蛭真武汤低剂量组、厄贝沙坦组(
n
=6)。模型组及各治疗组行左侧输尿管结扎,假手术组不结扎输尿管,仅分离输尿管后关闭腹腔。术后1 d开始灌胃给药,假手术组、模型组予无菌蒸馏水10 mL·kg
-1
,芪蛭真武汤高剂量组予芪蛭真武汤22.2 g·kg
-1
,低剂量组予芪蛭真武汤11.1 g·kg
-1
,厄贝沙坦组予厄贝沙坦片0.02 g·kg
-1
。各组大鼠分别于术后14 d取材,取材前收集24 h尿液,检测24 h尿蛋白定量(24 h-Upr);收集血清用以检测肌酐(SCr),尿素氮(BUN);取结扎侧肾组织行苏木素-伊红(HE)染色、马松(Masson)染色,光镜下观察其病理改变;免疫组化法(IHC)检测
α
-平滑肌肌动蛋白(
α
-SMA),Ⅰ型胶原蛋白(Col-Ⅰ)和纤维连接蛋白(FN)的表达;蛋白免疫印迹法(Western blot)检测TGF-
β
1
,Smad3,p-Smad3,非吞噬细胞氧化酶Ⅳ(NOX4)的表达。
结果
2
与假手术组比较,模型组SCr,BUN,胶原容积分数(CVF),24 h-Upr均增高(
P
<
0.05,
P
<
0.01),模型组
α
-SMA,Col-Ⅰ,FN,TGF-
β
1
,p-Smad3,NOX4蛋白的表达均较高(
P
<
0.05);与模型组比较,芪蛭真武汤高剂量组和厄贝沙坦组的SCr,BUN,CVF,芪蛭真武汤高剂量组的24 h-Upr均较低(
P
<
0.05);各中药治疗组
α-
SMA,Col-Ⅰ,FN,TGF-
β
1
,Smad3,p-Smad3,NOX4的表达均较少(
P
<
0.05)。
结论
2
芪蛭真武汤能够减少UUO大鼠的尿蛋白,保护肾脏功能,抑制肾间质纤维化的发生、发展;其机制可能与抑制TGF-
β
1
/Smads信号通路和氧化应激反应有关。
Objective
2
To explore the effect of Qizhu Zhenwutang on renal interstitial fibrosis in rats ligated with unilateral ureter, transforming growth factor-
β
1
(TGF-
β
1
)/Smads and oxidative stress.
Method
2
A total of 30 male SD rats were randomly divided into sham operation group, model group, high-dose group, low-dose group and irbesartan group (
n
=6). The left ureter ligation was performed in the model group and the treatment group. In the sham operation group, the ureter was not ligated, only the ureter was separated, and the abdominal cavity was closed. Rats in each group were given drugs by gavage on the next day after operation. Sham operation group and model group were given aseptic distilled water 10 mL·kg
-1
by gavage, high-dose Qizhizhenwu Tang group was given 22.2 g·kg
-1
by gavage, low-dose group was given 11.1 g·kg
-1
by gavage, and irbesartan group was given 0.02 g·kg
-1
by gavage. Rats in each group were sacrificed on the 14
th
day after operation, 24-hour urine was collected before sampling, and the total amount of 24 hour urine protein (24 h-Upr) was detected. Blood samples were collected from the abdominal aorta to detect serum creatinine(SCr) and blood urea nitrogen (BUN). The tissues were stained with htoxylin eosin (HE) and Masson, and the pathological changes were observed under light microscope, immunohistochemical method was used to detect
α
-SMA, FN and Col-Ⅰ expressions. Western blot method was used to detect the expressions of TGF-
β
1
, Smad3, p-Smad3 and NOX4.
Result
2
Compared with sham group, SCr, BUN and collagen volume fraction (CVF),24 h-Upr in model group were all increased (
P
<
0.05,
P
<
0.01). The expressions of
α
-SMA, Col-Ⅰ, FN, TGF-
β
1
, p-Smad3, NOX4 were higher (
P
<
0.05). Compared with the model group, SCr, BUN and CVF were lower in high-dose group and irbesartan group (
P
<
0.05). 24 h-Upr was lower in high-dose group (
P
<
0.05), the expressions of
α
-SMA, Col-Ⅰ, FN, TGF-
β
1
, Smad3, p-Smad3, NOX4 in traditional Chinese medicine treatment group were less (
P
<
0.05).
Conclusion
2
Qizhi Zhenwutang can reduce the urinary protein of UUO rats, protect the renal function, and inhibit the occurrence and development of renal interstitial fibrosis, the mechanism may be related to the inhibition of TGF-
β
1
/Smads signaling pathway and oxidative stress response.
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