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中国中医科学院 眼科医院,北京 100040
Received:12 April 2021,
Published Online:08 July 2021,
Published:05 September 2021
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李佳贤,张晶,魏春秀等.青蒿琥酯对实验性脉络膜新生血管的干预作用及对视网膜脉络膜组织HIF-1α,VEGF表达的影响[J].中国实验方剂学杂志,2021,27(17):83-89.
LI Jia-xian,ZHANG Jing,WEI Chun-xiu,et al.Effect of Artesunate on Experimental Choroidal Neovascularization and Expression of HIF-1α and VEGF[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(17):83-89.
李佳贤,张晶,魏春秀等.青蒿琥酯对实验性脉络膜新生血管的干预作用及对视网膜脉络膜组织HIF-1α,VEGF表达的影响[J].中国实验方剂学杂志,2021,27(17):83-89. DOI: 10.13422/j.cnki.syfjx.20211605.
LI Jia-xian,ZHANG Jing,WEI Chun-xiu,et al.Effect of Artesunate on Experimental Choroidal Neovascularization and Expression of HIF-1α and VEGF[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(17):83-89. DOI: 10.13422/j.cnki.syfjx.20211605.
目的
2
通过观察青蒿琥酯(ART)对实验性脉络膜新生血管(CNV)及相关蛋白表达的影响,探讨其对CNV的干预作用及可能机制。
方法
2
将80只BN大鼠随机分为5组,每组16只,除正常组外,其余应用532 nm激光机建立CNV动物模型。5组分别灌胃给药14 d,ART低剂量、高剂量组10.08,20.16 mg·kg
-1
·d
-1
,正常组、模型组、康柏西普组等容积1%羧甲基纤维素钠(CMC-Na)溶液灌胃,同时康柏西普组予5 μL玻璃体腔注射1次。分别在7,14 d应用眼底荧光素血管造影法(FFA)评价CNV荧光素渗漏情况(灰度值),苏木素-伊红(HE)染色观察CNV组织病理学变化,蛋白免疫印迹法(Western blot)检测视网膜脉络膜中缺氧诱导因子-1
α
(HIF-1
α
),血管内皮生长因子(VEGF)蛋白表达水平。
结果
2
FFA结果显示,与正常组比较,模型组灰度值在7 d及14 d时升高(
P
<
0.01);7 d时与模型组比较,ART高剂量组、康柏西普组灰度值降低(
P
<
0.01);14 d时与模型组比较,ART各剂量组、康柏西普组灰度值不同程度降低(
P
<
0.05,
P
<
0.01)。HE结果显示,与正常组比较,模型组CNV厚度值在7 d及14 d时显著升高(
P
<
0.01);与模型组比较,ART各剂量组、康柏西普组CNV厚度值降低(
P
<
0.01)。与正常组比较,模型组HIF-1
α
,VEGF表达量在7 d及14 d时不同程度升高(
P
<
0.05,
P
<
0.01);与模型组比较,ART各剂量组、康柏西普组表达量降低(
P
<
0.01)。
结论
2
ART对实验性CNV具有抑制作用,其机制与下调实验性CNV形成早期HIF-1
α
,VEGF的表达有关。
Objective
2
To observe the effects of artesunate (ART) on experimental choroidal neovascularization (CNV) and the expression of related proteins, and to explore the underlying mechanism.
Method
2
Eighty BN rats were randomly divided into five groups: a normal group, a model group, a conbercept group, and low- (10.08 mg·kg
-1
·d
-1
) and high-dose (20.16 mg·kg
-1
·d
-1
) ART groups, with 16 rats in each group. A CNV model was established with 532 nm laser in rats of the groups except for the normal group. The rats in each group were treated with corresponding drugs by gavage for 14 days. The normal group, the model group, and the conbercept group received 1% CMC-Na solution at the same volume, while the conbercept group received an intravitreal injection (5 μL) once. On days 7 and 14, fundus fluorescein angiography (FFA) was used to evaluate the fluorescein leakage (gray value) of CNV. Hematoxylin-eosin (HE) staining was adopted to observe the histopathological changes of CNV. Western blot was employed to detect the protein expression levels of hypoxia-inducible factor-1
α
(HIF-1
α
) and vascular endothelial growth factor (VEGF) in the retina and choroid.
Result
2
FFA results showed that compared with the normal group, other groups showed increased gray value on days 7 and 14 (
P
<
0.01). On day 7, the gray value of the high-dose ART group and the conbercept group decreased compared with that in the model group (
P
<
0.01). On day 14, the gray value of the ART groups and the conbercept group decreased in varying degrees compared with that in the model group (
P
<
0.05,
P
<
0.01). HE results showed that compared with the normal group, the model group showed increased thickness of CNV on days 7 and 14 (
P
<
0.01). Compared with the model group, the ART groups and the conbercept group displayed decreased thickness of CNV (
P
<
0.01). Western blot results revealed that the expression of HIF-1
α
and VEGF in the model group increased in varying degrees on the days 7 and 14 compared with that in the normal group (
P
<
0.05,
P
<
0.01), while compared with the model group, the ART groups and the conbercept group showed decreased expression (
P
<
0.01).
Conclusion
2
ART can inhibit experimental CNV by down-regulating the expression of HIF-1
α
and VEGF in the early stage of experimental CNV formation.
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