A colorimetric and ratiometric fluorescent probe for the imaging of endogenous hydrogen sulphide in living cells and sulphide determination in mouse hippocampus
作者:Ling Zhang、Sai Li、Mei Hong、Yuqing Xu、Shuaishuai Wang、Yi Liu、Yong Qian、Jing Zhao
DOI:10.1039/c4ob00285g
日期:——
A naphthalimide-azide based colorimetric and ratiometric fluorescent probe, NAP-1, has been developed for the selective and sensitive detection of hydrogen sulphide. Advantages of the probe NAP-1 include a low detection limit (110 nM), good selectivity, high sensitivity and excellent photostability. A linear relationship between the emission intensity ratios and sulphide concentrations was observed in PBS buffer and bovine serum, respectively. Our probe facilitates ratiometric determination and imaging of endogenous H2S in living cells. Furthermore, this probe was successfully applied to the measurement of endogenous sulphide in human plasma and mouse hippocampus. A significant reduction in sulphide levels and CBS mRNA expression was observed in the hippocampus of mouse models of lipopolysaccharide-induced neuroinflammation-related diseases, suggesting that decreased levels of endogenous H2S might be involved in the pathogenesis of neuroinflammation-related neurodegenerative diseases.
我们开发了一种基于萘啶酰亚胺-叠氮化物的比色法和比率法荧光探针 NAP-1,用于选择性和灵敏地检测硫化氢。探针 NAP-1 的优点包括检测限低(110 nM)、选择性好、灵敏度高和光稳定性好。在 PBS 缓冲液和牛血清中分别观察到了发射强度比和硫化物浓度之间的线性关系。我们的探针有助于活细胞中内源性 H2S 的比率测定和成像。此外,该探针还被成功应用于测量人血浆和小鼠海马中的内源性硫化物。在脂多糖诱导的神经炎症相关疾病小鼠模型的海马中观察到硫化物水平和 CBS mRNA 表达的明显降低,这表明内源性 H2S 水平的降低可能与神经炎症相关的神经退行性疾病的发病机制有关。