2023 , Vol. 20 >Issue 05: 530 - 536
DOI: https://doi.org/10.3877/cma.j.issn.1672-6448.2023.05.011
RGD微泡介导高频超声造影对类风湿性关节炎滑膜新生血管的定量评估
Copy editor: 吴春凤
收稿日期: 2022-02-28
网络出版日期: 2023-10-06
基金资助
内蒙古自治区科技计划项目(2019GG081)
内蒙古自治区自然科学基金联合基金项目(2016MS(LH)0808)
内蒙古自治区自然科学基金项目(2021MS08018)
版权
Quantitative assessment of synovial neovascularization in rheumatoid arthritis by high-frequency contrast-enhanced ultrasound with arginylglycylaspartic acid microbubbles
Received date: 2022-02-28
Online published: 2023-10-06
Copyright
探讨应用精氨酸-甘氨酸-天冬氨酸(RGD)微泡介导高频超声造影定量评估类风湿性关节炎滑膜新生血管的可行性。
制备RGD微泡并检测其一般特性(粒径、电位、微泡浓度)。将25只SD大鼠随机分为模型组20只和对照组5只,模型组通过胶原诱导法构建类风湿性关节炎(CIA)大鼠模型,对照组大鼠注射同等剂量的生理盐水。通过超声造影检测RGD微泡与裸微泡在CIA大鼠踝关节滑膜组织内的显影,RGD微泡与裸微泡在靶组织爆破前后造影强度的差值比较采用独立样本t检验。最后,取大鼠踝关节做苏木精-伊红(HE)染色及αVβ3、CD31、VEGF免疫组化染色来印证CIA大鼠踝关节滑膜增厚及血管新生情况。
制备的RGD微泡与裸微泡粒径[(0.82±0.25)μm vs(0.80±0.19)μm]和电位[(-1.63±3.52)mV vs(-1.65±3.51)mV]比较,差异均无统计学意义(P>0.05)。微泡浓度均为108个/ml。成功建立CIA大鼠模型,成模率达70%(14/20)。超声造影显示RGD微泡组在CIA大鼠踝关节爆破前后造影强度的差值明显高于裸微泡组[(5.81±1.50)dB vs(0.40±0.06)dB],差异具有统计学意义(t=8.032,P=0.001)。组织病理提示,与对照组相比,CIA大鼠滑膜明显增厚,αVβ3、CD31、VEGF呈高表达。
超声造影检测RGD微泡对CIA大鼠踝关节滑膜组织新生血管具有较好的靶向性,且能实现对滑膜新生血管的定量评估。
赵敏 , 施依璐 , 段莎莎 , 王雅皙 , 赵捷 , 赵海玥 , 张璐 , 白天昊 , 张小杉 . RGD微泡介导高频超声造影对类风湿性关节炎滑膜新生血管的定量评估[J]. 中华医学超声杂志(电子版), 2023 , 20(05) : 530 -536 . DOI: 10.3877/cma.j.issn.1672-6448.2023.05.011
To quantitatively evaluate synovial neovascularization in rheumatoid arthritis by high-frequency contrast-enhanced ultrasonography with arginylglycylaspartic acid (RGD) microbubbles.
RGD microbubbles were prepared and their general characteristics (particle size, potential, and microbubble concentration) were detected. A total of 25 rats were randomly divided into a model group (n=20) and a control group (n=5). A rat model of rheumatoid arthritis was created using collagen-induced method. Rats in the control group were injected with the same dose of normal saline. The imaging of RGD microbubbles and naked microbubbles in the synovial tissue of collagen-induced arthritis (CIA) rats was detected by ultrasound contrast-enhanced technology, and a comparison of contrast intensity difference between RGD microbubble and naked microbubble before and after blasting in target tissue was performed by the independent sample t test. Finally, rat ankle joints were taken for hematoxylin-eosin (HE) staining and immunohistochemical staining for αvβ3, CD31, and VEGF to confirm CIA rat ankle joint synovial thickening and angiogenesis.
Compared with naked microbubbles, the particle size of the prepared RGD microbubbles was [(0.82±0.25) μm vs (0.80±0.19) μm], and the potential was [(-1.63±3.52) mV vs (-1.65±3.51) mV], with no significant difference between the two (P>0.05 for both). Microbubble concentration was all 108/ml. A CIA rat model was successfully established, and the rate of successful modeling was up to 70% (14/20). Contrast-enhanced ultrasound showed that the contrast intensity difference between before and after ankle joint explosion in CIA rats in the RGD microbubble group was significantly higher than that of the naked microbubble group [(5.81±1.50) dB vs (0.40±0.06) dB, t=8.032, P=0.001]. Histopathology showed that the synovium of CIA rats was significantly thickened and αvβ3, CD31, and VEGF were highly expressed compared with control rats.
Contrast-enhanced ultrasound demonstrates that RGD microbubbles have good targeting ability to neovascularization in the ankle synovial tissue of CIA rats, and it can realize the quantitative evaluation of synovial neovascularization.
表1 2组大鼠血清αVβ3、VEGF及TNF-α浓度对比(pg/ml, |
组别 | 只数 | αVβ3 | VEGF | TNF-α |
---|---|---|---|---|
模型组 | 14 | 2675±260 | 299±25 | 319±13 |
对照组 | 5 | 1181±24 | 122±3 | 126±4 |
t值 | 12.61 | 15.56 | 30.51 | |
P值 | <0.001 | <0.001 | <0.001 |
注:αVβ3为血清整合素αVβ3,VEGF为血管内皮生长因子,TNF-α为肿瘤坏死因子-α |
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