Moshtaghion Seyed Mohamad Mehdi, Locri Filippo, Reyes Alvaro Plaza, Plastino Flavia, Kvanta Anders, Morillo-Sanchez Maria Jose, Rodríguez-de-la-Rúa Enrique, Gutierrez-Sanchez Estanislao, Montero-Sánchez Adoración, Lucena-Padros Helena, André Helder, Díaz-Corrales Francisco J
Department of Integrative Pathophysiology and Therapies, Andalusian Molecular Biology and Regenerative Medicine Centre (CABIMER), Junta de Andalucía, CSIC, University of Seville, University Pablo de Olavide, 41092 Seville, Spain.
Department of Clinical Neuroscience, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, 17177 Stockholm, Sweden.
Int J Mol Sci. 2025 Apr 18;26(8):3855. doi: 10.3390/ijms26083855.
Vascular endothelial growth factor (VEGF) is a key mediator of exudative age-related macular degeneration (eAMD), yet non-invasive biomarkers for disease monitoring remain limited. This study evaluates VEGF levels in human tear fluid as a potential biomarker for eAMD and investigates the molecular dynamics of VEGF in a laser-induced choroidal neovascularization (lCNV) mouse model. Tear VEGF levels were quantified using proximity qPCR immunoassays in eAMD patients (n = 29) and healthy controls (n = 21) and correlated with optical coherence tomography (OCT) findings. Molecular analyses, including immunohistochemistry, gene expression profiling, and phosphorylation assays, were conducted on choroid-retinal pigment epithelium (RPE) and lacrimal gland (LG) tissues from lCNV mice (n = 25). Tear VEGF levels were significantly elevated in eAMD patients, correlating with disease severity. Females exhibited higher VEGF levels, a pattern not replicated in the mouse model. In lCNV mice, VEGF overexpression originated from the choroid-RPE, driven by hypoxic and inflammatory signaling, with no significant LG contribution. Increased VEGF, IL-6, and vimentin expression, along with NF-κB and STAT3 activation, were observed. These findings suggest that tear VEGF is a promising non-invasive biomarker for eAMD, warranting further validation for clinical application in disease monitoring and treatment optimization.
血管内皮生长因子(VEGF)是渗出性年龄相关性黄斑变性(eAMD)的关键介质,但用于疾病监测的非侵入性生物标志物仍然有限。本研究评估人泪液中的VEGF水平作为eAMD的潜在生物标志物,并在激光诱导脉络膜新生血管(lCNV)小鼠模型中研究VEGF的分子动力学。使用邻近qPCR免疫测定法对eAMD患者(n = 29)和健康对照者(n = 21)的泪液VEGF水平进行定量,并与光学相干断层扫描(OCT)结果相关联。对lCNV小鼠(n = 25)的脉络膜-视网膜色素上皮(RPE)和泪腺(LG)组织进行了包括免疫组织化学、基因表达谱分析和磷酸化测定在内的分子分析。eAMD患者的泪液VEGF水平显著升高,与疾病严重程度相关。女性的VEGF水平较高,这种模式在小鼠模型中未重现。在lCNV小鼠中,VEGF的过表达起源于脉络膜-RPE,由缺氧和炎症信号驱动,泪腺没有显著贡献。观察到VEGF、IL-6和波形蛋白表达增加,以及NF-κB和STAT3激活。这些发现表明,泪液VEGF是一种有前景的eAMD非侵入性生物标志物,值得进一步验证其在疾病监测和治疗优化中的临床应用。
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