Combining cross-coupling reaction and Knoevenagel condensation in the synthesis of glyco-BODIPY probes for DC-SIGN super-resolution bioimaging
作者:Giacomo Biagiotti、Edvin Purić、Iztok Urbančič、Ana Krišelj、Matjaž Weiss、Janez Mravljak、Cristina Gellini、Luigi Lay、Fabrizio Chiodo、Marko Anderluh、Stefano Cicchi、Barbara Richichi
DOI:10.1016/j.bioorg.2021.104730
日期:2021.4
BODIPY-mannose 1 was efficiently taken up by immune cells expressing DC-SIGN receptors. Super-resolution stimulated emission depletion (STED) microscopy further revealed that the internalized 1 localized in membranes of endosomes, proving that 1 is a reliable tool also in STED applications. Of note, glyco-BODIPY 1 contains an aryl-azido group, which allows further functionalization of the glycoprobe
凝集素参与广泛的碳水化合物介导的识别过程。因此,非常需要针对凝集素靶向并能够有效跟踪与此类关键目标相关的事件的高性能荧光工具的可用性。我们在此报告了基于类 Heck 交叉耦合和 Knoevenagel 缩合的有效组合的glyco-BODIPY 1和2的合成,这揭示了解决凝集素的效率。特别是,glyco-BODIPY 1具有两个糖苷酶稳定的 C-甘露糖残基,它们充当 DC-SIGN(树突细胞特异性细胞间粘附分子-3-抓取非整联蛋白)靶向模块。通过使用活细胞荧光显微镜,我们证明了 BODIPY-甘露糖1被表达 DC-SIGN 受体的免疫细胞有效吸收。超分辨率受激发射损耗 (STED) 显微镜进一步揭示了内化1位于内体膜中,证明1在 STED 应用中也是一种可靠的工具。值得注意的是,glyco-BODIPY 1包含一个芳基-叠氮基,它允许用生物活性分子进一步功能化糖探针,从而为使用1跟踪不同生物环境中凝集素介导的细胞内化铺平了道路。