pathological activities. However, the current fluorescent probes for the detection of late apoptosis were “–” probes, which were facilely interfered by false positive signals caused by inhomogeneous staining and other factors. Herein, a unique fluorescent probe (NPn) discriminating late apoptosis from early apoptosis and heathy status with two different sets of fluorescent signals have been prepared, to overcome
细胞凋亡是一个重要的生理过程,在关键的
生物学和病理活动中发挥着核心作用。但目前检测晚期凋亡的荧光探针均为“-”型探针,容易受到染色不均匀等因素造成的假阳性信号干扰。在此,制备了一种独特的荧光探针(NPn),用两组不同的荧光信号区分晚期凋亡与早期凋亡和健康状态,以克服可能的假阳性信号。 NPn 被设计为对
生物膜不可渗透,同时对 DNA/RNA 具有高亲和力,其位于活细胞和早期凋亡细胞的质膜上,而在晚期凋亡细胞中重新定位到细胞核。亲
水性胺单元和小离子半径对其膜不渗透性敏感,这通过两个不含胺基的对照分子得到证实。利用该探针,我们成功评估了紫外线照射、
鱼藤酮、
秋水仙碱和
紫杉醇诱导的细胞凋亡,展示了其在
生物学研究中的潜在应用。