关键词:
Tumor microenvironment
Probes
Sulfone-xanthone
Molecular engineering
Fluorescence navigation
摘要:
Precise molecular engineering for the pK_(a)regulation of pH-sensing probes with pan-tumor visualization capability remains attractive and ***,most molecular engineering strategies focus directly on the fluorophore,and long-distance regulation strategies have been rarely ***,an innovative spacer-based pK_(a)regulation strategy was *** a mesoamino-substituted sulfone-xanthene fluorophore,the spacer efficiently regulated the pK_(a)values to 5.87,5.37,and 3.73 with three,two,and one spacers,*** functional theory(DFT)calculations revealed that the elongation of the N-H bond by the trifluoromethyl group(from 1.02 to 1.15 A)promoted proton dissociation,thereby reducing pK_(a).However,as the number of spacers increased,the regulation efficiency showed a decreasing *** optimized probe,J-S-BCF_(3),successfully illuminated three orthotopic tumor models with high accuracy in depicting tumor boundaries,as well as in microlymph node metastasis and lung metastasis *** J-S-BCF_(3),reserpine was efficiently identified as a V-ATPase inhibitor through fluorescence-based high-throughput screening of natural ***,the probe effectively monitored tumor microenvironment reprogramming induced by the reserpine ***,this innovative chemical strategy,which employs a unique spacer design,broadens the scope for constructing high-performance fluorescent probes with regulated properties,thereby offering high potential for detecting multiple tumors and metastases and facilitating the translation of biomedical research into clinical applications.