Reactivity based fluorescent probes have been widely investigated as a powerful and noninvasive tool for disease diagnosis in recent years. β-Galactosidase (β-gal), one of the typical lysosomal glycosidases, is reported to be a vital biomarker overexpressed in primary ovarian cancer cells. Fluorescent probes with excellent performance for endogenous β-gal detection offer a unique option for visualization and diagnosis of primary ovarian cancer cells. Herein, a near-infrared fluorescent probe Lyso-Gal with lysosome-targeting ability was developed for lysosomal β-gal detection and imaging in ovarian cancer cells (SKOV-3 cells). Lyso-Gal exhibits weak fluorescence in aqueous solution but emits bright NIR fluorescence at 725 nm after incubation with β-gal. Highly selective imaging of ovarian cancer cells has been achieved upon incubation with Lyso-Gal for only 1 min. The detection time is extremely short. In comparison with a similar hemicyanine probe, Hx-Gal, without lysosome-targeting ability, Lyso-Gal realizes endogenous β-gal visualization in lysosomes and shows brighter fluorescence than Hx-Gal in SKOV-3 cells. This work demonstrates the potential of Lyso-Gal for detection of primary ovarian cancer cells by using β-gal as the biomarker.
近年来,基于反应性的荧光探针作为一种强大的、非侵入性的疾病诊断工具已被广泛研究。
β-半乳糖苷酶(β-gal)是一种典型的溶酶体糖苷酶,据报道是原发性卵巢癌细胞中过度表达的重要
生物标志物。用于内源性 β-gal 检测的荧光探针具有出色的性能,为原发性卵巢癌细胞的可视化和诊断提供了独特的选择。在此,开发了一种具有溶酶体靶向能力的近红外荧光探针Lyso-Gal,用于卵巢癌细胞(SKOV-3细胞)中溶酶体β-gal的检测和成像。 Lyso-Gal 在
水溶液中表现出弱荧光,但与 β-gal 孵育后在 725 nm 处发出明亮的近红外荧光。与 Lyso-Gal 孵育仅 1 分钟即可实现卵巢癌细胞的高选择性成像。检测时间极短。与类似的不具有溶酶体靶向能力的半
花青探针Hx-Gal相比,Lyso-Gal实现了溶酶体中内源性β-gal的可视化,并且在SKOV-3细胞中显示出比Hx-Gal更亮的荧光。这项工作展示了 Lyso-Gal 通过使用 β-gal 作为
生物标志物检测原发性卵巢癌细胞的潜力。