实验研究
ENGLISH ABSTRACT
芪灯明目胶囊对氧诱导视网膜病变小鼠视网膜血管的保护作用
刘春梦
丁珊
董雪雯
赵丹丹
蒲思源
裴利
张富文
作者及单位信息
·
DOI: 10.3760/cma.j.cn115989-20220426-00181
Protective effect of Qideng Mingmu capsule on retinal vessels in mice with oxygen-induced retinopathy
Liu Chunmeng
Ding Shan
Dong Xuewen
Zhao Dandan
Pu Siyuan
Pei Li
Zhang Fuwen
Authors Info & Affiliations
Liu Chunmeng
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
Ding Shan
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
Dong Xuewen
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
Zhao Dandan
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
Pu Siyuan
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
Pei Li
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
Zhang Fuwen
Eye School of Chengdu University of Traditional Chinese Medicine, Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, Chengdu 610075, China
·
DOI: 10.3760/cma.j.cn115989-20220426-00181
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摘要

目的研究芪灯明目胶囊对氧诱导视网膜病变(OIR)小鼠视网膜新生血管形成及重塑的影响。

方法将36只出生后第7天的(P7)SPF级C57BL/6J幼鼠采用随机数字表法分为正常组、OIR组、芪灯明目胶囊组和阿帕替尼组,每组9只。正常组小鼠于正常环境下饲养,其余小鼠均在高氧环境中[氧浓度为(75±2)%]饲养5 d(P7~P12)后再在正常环境中饲养5 d(P12~P17)建立OIR模型。芪灯明目胶囊组和阿帕替尼组从P12开始分别给予芪灯明目胶囊(900 mg/kg)与血管内皮生长因子受体2抑制剂阿帕替尼(70 mg/kg)灌胃,1次/d,连续5 d。P17时,摘取小鼠眼球,制作眼球石蜡切片并行苏木精-伊红染色,计数各组小鼠突破内界膜的血管内皮细胞数目;制作视网膜铺片并行FITC-dextran荧光染色,计算视网膜无灌注区面积比、新生血管密度与总血管密度;采用免疫荧光染色法检测视网膜血管内皮细胞标志物CD31与周细胞标志物α-平滑肌肌动蛋白(α-SMA)的分布和荧光强度;采用免疫组织化学染色法检测视网膜缺氧诱导因子1α(HIF-1α)与血管内皮钙黏蛋白(VE-cadherin)的表达分布。

结果正常组、OIR组、芪灯明目胶囊组和阿帕替尼组突破内界膜的血管内皮细胞数目分别为(2.83±4.40)、(37.33±5.43)、(23.83±6.79)和(14.00±9.34)个,总体比较差异有统计学意义( F=28.313, P<0.001),其中OIR组突破内界膜血管内皮细胞数明显多于正常组、芪灯明目胶囊组和阿帕替尼组,差异均有统计学意义(均 P<0.05)。视网膜铺片结果显示,OIR组视网膜存在大片无灌注区域与新生血管芽,血管迂曲,分布紊乱,芪灯明目胶囊组和阿帕替尼组血管分布较OIR组更均匀,无灌注区面积和新生血管较OIR组减少。正常组、芪灯明目胶囊组和阿帕替尼组视网膜无灌注区面积比和新生血管密度均较OIR组降低,差异均有统计学意义(均 P<0.05)。正常组、芪灯明目胶囊组和阿帕替尼组CD31免疫荧光强度和HIF-1α吸光度值明显低于OIR组,α-SMA免疫荧光强度和VE-cadherin吸光度值明显高于OIR组,差异均有统计学意义(均 P<0.05)。

结论芪灯明目胶囊能够抑制OIR小鼠视网膜新生血管形成,增加血管周细胞覆盖,缓解视网膜缺氧以及增加血管完整性,对OIR小鼠视网膜血管起到保护作用。

视网膜新生血管;氧诱导视网膜病变;小鼠;芪灯明目胶囊;阿帕替尼
ABSTRACT

ObjectiveTo investigate the effect of Qideng Mingmu capsule on the formation and remodeling of retinal neovascularization in mice with oxygen-induced retinopathy (OIR).

MethodsThirty-six postnatal day 7 (P7)SPF grade C57BL/6J pups were divided into normal group, OIR group, Qideng Mingmu capsule group and apatinib group by random number table method, with 9 mice in each group.The mice in the normal group were raised in normal environment.The mice in the other three groups were fed in hyperoxic environment of (75±2)% oxygen concentration for 5 days from P7 to P12 and then were fed in normal environment for 5 days from P12 to P17 to establish the OIR model.From P12, mice in Qideng Mingmu capsule group and apatinib group were given intragastric administration of Qideng Mingmu capsule (900 mg/kg) and vascular endothelial growth factor receptor 2 inhibitor apatinib (70 mg/kg) respectively, once a day for 5 consecutive days.On P17, paraffin sections of mouse eyeballs were made and stained with hematoxylin-eosin to count the number of vascular endothelial cells that broke through the internal limiting membrane.The retinal slices were prepared and stained with FITC-dextran to quantify the retinal non-perfusion area, neovascularization density and total vascular density.The distribution and fluorescence intensity of retinal vascular endothelial cell marker CD31 and pericyte marker α-smooth muscle actin (α-SMA) were observed by double immunofluorescence staining.Immunohistochemical staining was used to detect the expression and distribution of retinal hypoxia inducible factor-1α (HIF-1α) and vascular endothelial cadherin (VE-cadherin).The use and care of animals were in accordance with the Regulations on the Management of Laboratory Animals issued by the Ministry of Science and Technology.This study was approved by the Animal Ethics Committee of Chengdu University of Traditional Chinese Medicine (No.2019-30).

ResultsThe number of vascular endothelial cells breaking through the internal limiting membrane in normal group, OIR group, Qideng Mingmu capsule group and apatinib group were (2.83±4.40), (37.33±5.43), (23.83±6.79) and (14.00±9.34), respectively, with a statistically significant overall difference ( F=28.313, P<0.001).There were more vascular endothelial cells breaking through internal limiting membrane in OIR group than in normal group, Qideng Mingmu capsule group and apatinib group, showing statistically significant differences (all at P<0.05).In the observation of mouse retinal slices, there were large non-perfusion areas, neovascularization buds and disordered distribution of blood vessels in OIR group.The distribution of blood vessels was more uniform and the areas of non-perfusion and neovascularization were smaller in Qideng Mingmu capsule group and apatinib group than in OIR group.The relative area of central retinal non-perfusion area and neovascularization density were significantly lower in normal group, Qideng Mingmu capsule group and apatinib group than in OIR group (all at P<0.05).The immunofluorescence intensity of CD31 and the absorbance value of HIF-1α were significantly lower, and the immunofluorescence intensity of α-SMA and the absorbance value of VE-cadherin were significantly higher in normal group, Qideng Mingmu capsule group and apatinib group than in OIR group (all at P<0.05).

ConclusionsQideng Mingmu capsule can inhibit retinal neovascularization formation, increase vascular pericyte coverage, relieve retinal hypoxia and increase vascular integrity in OIR mice.It can protect the retinal vessels of OIR mice.

Retinal neovascularization;Oxygen-induced retinopathy;Mouse;Qideng Mingmu capsule;Apatinib
Zhang Fuwen, Email: mocdef.3ab61333newfz
引用本文

刘春梦,丁珊,董雪雯,等. 芪灯明目胶囊对氧诱导视网膜病变小鼠视网膜血管的保护作用[J]. 中华实验眼科杂志,2024,42(05):428-435.

DOI:10.3760/cma.j.cn115989-20220426-00181

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视网膜新生血管(retinal neovascularization,RNV)是早产儿视网膜病变、视网膜静脉阻塞和糖尿病视网膜病变等眼病的重要病理表现,常引起出血和渗漏,影响视功能 [ 1 , 2 ]。抗血管内皮生长因子(vascular endothelial growth factor,VEGF)玻璃体腔注射是目前RNV的标准药物治疗方式,可有效减轻黄斑水肿、减少新生血管以及改善或稳定视力 [ 3 ]。然而,VEGF抑制剂的视力改善作用通常会随着时间的推移而下降,需要频繁注射以维持视力,给患者和社会带来沉重的负担,且患者的依从性会随病程的延长而下降 [ 4 , 5 ]。也有研究表明抗VEGF治疗会加速增生性视网膜外膜的形成,并加剧玻璃体视网膜牵引 [ 6 ]。因此,有必要研究RNV新的治疗方法。芪灯明目胶囊由葛根、黄芪和灯盏细辛组成。有研究显示芪灯明目胶囊能减轻高血糖导致的大鼠视网膜微血管损害,减少周细胞丢失,保护血-视网膜屏障,其作用机制可能与抑制VEGF-A,以及缺氧诱导因子1α(hypoxia inducible factor-1α,HIF-1α)等有关 [ 7 , 8 , 9 , 10 ]。葛根素能抑制氧诱导的大鼠RNV,黄芪能减少高糖环境下血管内皮细胞损伤,灯盏细辛能使癌变组织的血管向良性血管生长,从而产生"良性血管生成"的抗癌功效 [ 11 , 12 , 13 ]。基于以上研究,推测芪灯明目胶囊能抑制RNV的形成,并且可能对新生血管具有良性血管转化作用,从而促进视网膜血管系统稳定。由于芪灯明目胶囊是口服给药,而目前针对RNV标准的治疗是抗VEGF药物玻璃体注射治疗。为避免给药方式产生的影响,本研究以口服VEGFR2抑制剂阿帕替尼 [ 14 ]作为阳性对照药物。本研究建立氧诱导视网膜病变(oxygen-induced retinopathy,OIR)模型,观察芪灯明目胶囊对RNV形成和重塑的影响,探讨芪灯明目胶囊是否在抑制RNV形成的同时促进良性血管转化,从而保护视网膜,为其临床应用提供新的实验依据。
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备注信息
A
张富文,Email: mocdef.3ab61333newfz
B

刘春梦:参与设计实验、研究实施、数据采集、分析/解释数据、统计分析及论文撰写;丁珊:参与设计实验、研究实施、数据采集及分析/解释数据;董雪雯:参与研究实施、数据采集及分析/解释数据;赵丹丹、蒲思源、裴利:参与数据采集和分析/解释数据;张富文:参与设计实验、研究实施、统计分析和论文智力性内容的修改及定稿

C
所有作者均声明不存在利益冲突
D
四川省自然科学基金面上项目 (2023NSFSC0690)
成都中医药大学"杏林学者"学科人才项目 (YXRC2018013)
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