High fluorescence quantum yield(QY),excellent fluorescence stability,and low toxicity are essential for a good cellular imaging fluorescent probe.Green-emissive carbon quantum dots(CQDs)with many advantages,such as un...High fluorescence quantum yield(QY),excellent fluorescence stability,and low toxicity are essential for a good cellular imaging fluorescent probe.Green-emissive carbon quantum dots(CQDs)with many advantages,such as unique fluorescence properties,anti-photobleaching,low toxicity,fine biocompatibility and high penetration depth in tissues,have been considered as a potential candidate in cell imaging fluorescent probes.Herein,N,S-codoped green-emissive CQDs(QY=64.03%)were synthesized by the one-step hydrothermal method,with m-phenylenediamine as the carbon and nitrogen source,and L-cysteine as the nitrogen and sulfur dopant,under the optimum condition of 200℃ reaction for 2 h.Their luminescence was found to originate from the surface state.In light of the satisfactory photobleaching resistance and the low cytotoxicity,CQDs were used as a cell imaging probe for HeLa cell imaging.The results clearly indicate that cells can be labeled with CQDs,which can not only enter the cytoplasm,but also enter the nucleus through the nuclear pore,showing their broad application prospect in the field of cell imaging.展开更多
The Golgi apparatus is one of the important organelles,where the final processing and packaging of cellular secretions(such as proteins)are completed.The disorder of Golgi apparatus structure and function will induce ...The Golgi apparatus is one of the important organelles,where the final processing and packaging of cellular secretions(such as proteins)are completed.The disorder of Golgi apparatus structure and function will induce many diseases.Therefore,monitoring the morphological structure of Golgi apparatus is crucial for the diagnosis and treatment of relevant diseases.In order to achieve Golgi apparatus-targeting imaging,the strategy of targeting unit inheritance was adopted and carbon dots(CDs)with Golgi apparatus-targeting ability were synthesized by one-step hydrothermal method with L-ascorbic acid with high reactivity and reducibility as the carbon source and L-cysteine as the targeting unit.CDs have a certain amount of cysteine residues on their surface,and have excitation dependence,satisfactory fluorescence and cysteine residues stability and low toxicity.As an imaging agent,CDs can be used for targeting imaging of Golgi apparatus.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.51972221 and 51803148)Central Government Guides Local Science and Technology Development Projects(YDZX20201400001722)+1 种基金the Shanxi Provincial Excellent Talents Science and Technology Innovation Project(201805D211001)the Natural Science Foundation of Shanxi Province(201901D211502 and 201901D211501).
文摘High fluorescence quantum yield(QY),excellent fluorescence stability,and low toxicity are essential for a good cellular imaging fluorescent probe.Green-emissive carbon quantum dots(CQDs)with many advantages,such as unique fluorescence properties,anti-photobleaching,low toxicity,fine biocompatibility and high penetration depth in tissues,have been considered as a potential candidate in cell imaging fluorescent probes.Herein,N,S-codoped green-emissive CQDs(QY=64.03%)were synthesized by the one-step hydrothermal method,with m-phenylenediamine as the carbon and nitrogen source,and L-cysteine as the nitrogen and sulfur dopant,under the optimum condition of 200℃ reaction for 2 h.Their luminescence was found to originate from the surface state.In light of the satisfactory photobleaching resistance and the low cytotoxicity,CQDs were used as a cell imaging probe for HeLa cell imaging.The results clearly indicate that cells can be labeled with CQDs,which can not only enter the cytoplasm,but also enter the nucleus through the nuclear pore,showing their broad application prospect in the field of cell imaging.
基金This work was supported by the National Natural Science Foundation of China(82172048 and U21A20378)the Natural Science Foundation of Shanxi Province(202103021223439 and 201901D111419)+4 种基金the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering(2021SX-FR010)the Shanxi Technology Innovation Center for Controlled and Sustained Release of Nano-drugs(202104010911026)the Doctoral Starting Foundation of Shanxi Province(SD2218)the Doctoral Foundation of the Second Hospital of Shanxi Medical University(202201-1)Collaborative Innovation Center of R&D molecular diagnosis,Treatment Technology and targeted drugs for cancer of Shanxi Medical University(5-2-1-A-5).
文摘The Golgi apparatus is one of the important organelles,where the final processing and packaging of cellular secretions(such as proteins)are completed.The disorder of Golgi apparatus structure and function will induce many diseases.Therefore,monitoring the morphological structure of Golgi apparatus is crucial for the diagnosis and treatment of relevant diseases.In order to achieve Golgi apparatus-targeting imaging,the strategy of targeting unit inheritance was adopted and carbon dots(CDs)with Golgi apparatus-targeting ability were synthesized by one-step hydrothermal method with L-ascorbic acid with high reactivity and reducibility as the carbon source and L-cysteine as the targeting unit.CDs have a certain amount of cysteine residues on their surface,and have excitation dependence,satisfactory fluorescence and cysteine residues stability and low toxicity.As an imaging agent,CDs can be used for targeting imaging of Golgi apparatus.
