Subconjunctival aflibercept inhibits corneal angiogenesis and VEGFR-3+CD11b+ cells.

IF 2.4 3区 医学 Q2 OPHTHALMOLOGY Graefe’s Archive for Clinical and Experimental Ophthalmology Pub Date : 2024-12-01 Epub Date: 2024-07-09 DOI:10.1007/s00417-024-06560-4
Chang Ho Yoon, Jung Hwa Ko, Hyun Ju Lee, Hyun Beom Song, Joo Youn Oh
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Abstract

Purpose: This study aimed to investigate the effects of subconjunctival injection of aflibercept, a soluble protein decoy for VEGFR-1 and VEGFR-2, on corneal angiogenesis and VEGFR-expressing CD11b+ cells in a mouse model of suture-induced corneal neovascularization.

Methods: Corneal neovascularization was induced in BALB/c mice by placing three sutures on the cornea. Immediately after surgery, either 200 µg aflibercept (5 µL) or an equal volume of phosphate-buffered saline (PBS) was administered into the subconjunctival space. Seven days after later, corneal new vessels were quantified through clinical examination and measurement of the CD31-stained area in corneal flat mounts. The levels of pro-angiogenic and inflammatory markers in the cornea were evaluated using RT-qPCR. The percentages of VEGFR-2+CD11b+ cells and VEGFR-3+CD11b+ cells were analyzed in the cornea, blood, and draining cervical lymph nodes (DLNs) using flow cytometry.

Results: Subconjunctival injection of aflibercept significantly reduced the growth of corneal new vessels compared to subconjunctival PBS injection. The mRNA levels of Cd31, vascular growth factors (Vegfc and Angpt1), and pro-angiogenic/inflammatory markers (Tek/Tie2, Mrc1, Mrc2, and Il6) in the cornea were downregulated by subconjunctival aflibercept. Also, the percentage of VEGFR-3+CD11b+ cells in the cornea, blood, and DLNs was decreased by aflibercept, whereas that of VEGFR-2+CD11b+ cells was unaffected.

Conclusion: Subconjunctival aflibercept administration inhibits inflammatory angiogenesis in the cornea and reduces the numbers of cornea-infiltrating and circulating VEGFR-3+CD11b+ cells.

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结膜下 aflibercept 可抑制角膜血管生成和 VEGFR-3+CD11b+ 细胞。
目的:本研究旨在探讨在缝线诱导的角膜新生血管小鼠模型中,结膜下注射阿弗利百普(一种VEGFR-1和VEGFR-2的可溶性蛋白诱饵)对角膜血管生成和VEGFR表达的CD11b+细胞的影响:在 BALB/c 小鼠角膜上缝合三针,诱导角膜新生血管。术后立即在结膜下间隙注射 200 µg aflibercept(5 µL)或等体积的磷酸盐缓冲盐水(PBS)。七天后,通过临床检查和测量角膜平片上的 CD31 染色面积,对角膜新生血管进行量化。使用 RT-qPCR 评估了角膜中促血管生成和炎症标志物的水平。使用流式细胞术分析了角膜、血液和引流颈淋巴结(DLNs)中 VEGFR-2+CD11b+ 细胞和 VEGFR-3+CD11b+ 细胞的百分比:结果:与结膜下注射 PBS 相比,结膜下注射 aflibercept 能明显减少角膜新生血管的生长。结膜下注射 aflibercept 下调了角膜中 Cd31、血管生长因子(Vegfc 和 Angpt1)和促血管生成/炎症标志物(Tek/Tie2、Mrc1、Mrc2 和 Il6)的 mRNA 水平。此外,aflibercept 还降低了角膜、血液和 DLN 中 VEGFR-3+CD11b+ 细胞的比例,而 VEGFR-2+CD11b+ 细胞的比例则不受影响:结论:结膜下注射阿弗利百普能抑制角膜炎性血管生成,减少角膜浸润和循环中的 VEGFR-3+CD11b+ 细胞数量。
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来源期刊
CiteScore
5.40
自引率
7.40%
发文量
398
审稿时长
3 months
期刊介绍: Graefe''s Archive for Clinical and Experimental Ophthalmology is a distinguished international journal that presents original clinical reports and clini-cally relevant experimental studies. Founded in 1854 by Albrecht von Graefe to serve as a source of useful clinical information and a stimulus for discussion, the journal has published articles by leading ophthalmologists and vision research scientists for more than a century. With peer review by an international Editorial Board and prompt English-language publication, Graefe''s Archive provides rapid dissemination of clinical and clinically related experimental information.
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