Charge-driven tripod somersault on DNA for ratiometric fluorescence imaging of small molecules in the nucleus

Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic aci...

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Published inChemical science (Cambridge) Vol. 1; no. 43; pp. 153 - 164
Main Authors Wang, Kang-Nan, Cao, Qian, Liu, Liu-Yi, Zhao, Zi-Jian, Liu, Wenting, Zhou, Dan-Jie, Tan, Cai-Ping, Xia, Wei, Ji, Liang-Nian, Mao, Zong-Wan
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 21.11.2019
Royal Society of Chemistry
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Online AccessGet full text
ISSN2041-6520
2041-6539
DOI10.1039/c9sc03594j

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Abstract Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named "charge-driven tripod somersault on DNA", for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO 2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO 2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO 3 2− /HSO 3 − , a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe-DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes. We have developed a strategy "charge-driven tripod somersault on DNA" realizing both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time.
AbstractList Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named “charge-driven tripod somersault on DNA”, for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO32−/HSO3−, a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe–DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.
Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named “charge-driven tripod somersault on DNA”, for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO 2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO 2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO 3 2− /HSO 3 − , a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe–DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.
Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named "charge-driven tripod somersault on DNA", for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO /HSO , a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe-DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both and ratiometric fluorescence imaging of the variations of endogenous SO derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.
Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named "charge-driven tripod somersault on DNA", for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO3 2-/HSO3 -, a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe-DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named "charge-driven tripod somersault on DNA", for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO3 2-/HSO3 -, a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe-DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.
Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named "charge-driven tripod somersault on DNA", for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO 2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO 2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO 3 2− /HSO 3 − , a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe-DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes. We have developed a strategy "charge-driven tripod somersault on DNA" realizing both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time.
We have developed a strategy "charge-driven tripod somersault on DNA" realizing both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time. Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named “charge-driven tripod somersault on DNA”, for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO 2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO 2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO 3 2– /HSO 3 – , a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe–DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO 2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.
Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their variations in the nucleus mainly due to the impermeable nuclear membrane and nucleic acid interference. Herein, we take advantage of the nucleic acid enriched environment in the nucleus to establish a strategy, named "charge-driven tripod somersault on DNA", for ratiometric fluorescence imaging of small bioactive molecules in the nucleus. Taking SO2 derivatives as a typical target analyte, a tripodal probe has been constructed by conjugating two DNA binding groups containing a SO2 derivative reaction site. Mechanism studies demonstrate that upon encountering and reacting with SO32-/HSO3-, a charge variation occurs at the responsive arm of the tripodal probe, triggering a tripod somersault on DNA, resulting in the conformational rearrangement of the DNA binding modes with DNA-modulated fluorescence change, which allows the second emission feature to emerge. In this strategy, probe-DNA binding is not influenced by RNA or non-specific protein association, thus making it ideal for tracing nucleus-localized analytes. The application of this strategy has realized both in vitro and in vivo ratiometric fluorescence imaging of the variations of endogenous SO2 derivatives in the nucleus for the first time, with high specificity and selectivity. Also, in theory, this strategy opens up a new avenue for the design of fluorescence probes for the nucleus-localized biological analytes.
Author Xia, Wei
Tan, Cai-Ping
Wang, Kang-Nan
Ji, Liang-Nian
Zhao, Zi-Jian
Liu, Liu-Yi
Cao, Qian
Mao, Zong-Wan
Liu, Wenting
Zhou, Dan-Jie
AuthorAffiliation MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
Sun Yat-sen University
School of Chemistry
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  name: Sun Yat-sen University
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  name: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry
– name: a MOE Key Laboratory of Bioinorganic and Synthetic Chemistry , School of Chemistry , Sun Yat-sen University , Guangzhou , 510275 , P. R. China . Email: caoqian3@mail.sysu.edu.cn ; Email: cesmzw@mail.sysu.edu.cn ; Fax: +86 20 8411 2245
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/32055359$$D View this record in MEDLINE/PubMed
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Issue 43
Keywords SO2 DERIVATIVES
OXIDATIVE STRESS
LIVE-CELL
HYDROGEN-PEROXIDE
SENSORS
BISULFITE
PROBE
SULFUR-DIOXIDE DERIVATIVES
LIVING CELLS
SULFIDE
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1893794
Electronic supplementary information (ESI) available: Synthesis and characterization; DNA titration experiments, cytotoxicity of probes, and so on. CCDC
10.1039/c9sc03594j
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  year: 2019
  text: 2019-11-21
  day: 21
PublicationDecade 2010
PublicationPlace CAMBRIDGE
PublicationPlace_xml – name: CAMBRIDGE
– name: England
– name: Cambridge
PublicationTitle Chemical science (Cambridge)
PublicationTitleAbbrev CHEM SCI
PublicationTitleAlternate Chem Sci
PublicationYear 2019
Publisher Royal Soc Chemistry
Royal Society of Chemistry
Publisher_xml – name: Royal Soc Chemistry
– name: Royal Society of Chemistry
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Snippet Although fluorescence tracing of small bioactive molecules in living cells has been extensively studied, it is still a challenging task to detect their...
We have developed a strategy "charge-driven tripod somersault on DNA" realizing both in vitro and in vivo ratiometric fluorescence imaging of the variations of...
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SubjectTerms Binding
Biocompatibility
Biological activity
Chemistry
Chemistry, Multidisciplinary
Crystallography
Deoxyribonucleic acid
Derivatives
DNA
Fluorescent indicators
Imaging
Physical Sciences
Science & Technology
Selectivity
Strategy
Titration
Toxicity
Tracing
Title Charge-driven tripod somersault on DNA for ratiometric fluorescence imaging of small molecules in the nucleus
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https://www.ncbi.nlm.nih.gov/pubmed/32055359
https://www.proquest.com/docview/2312432008
https://www.proquest.com/docview/2355939763
https://pubmed.ncbi.nlm.nih.gov/PMC6991190
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