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Feng B, Wang K, Yang Y, Wang G, Zhang H, Liu Y, Jiang K. Ultrasensitive recognition of AP sites in DNA at the single-cell level: one molecular rotor sequentially self-regulated to form multiple different stable conformations. Chem Sci 2019; 10:10373-10380. [PMID: 32110326 PMCID: PMC6988597 DOI: 10.1039/c9sc04140k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 09/20/2019] [Indexed: 01/22/2023] Open
Abstract
The AP site is a primary form of DNA damage. Its presence alters the genetic structure and eventually causes malignant diseases. AP sites generally present a high-speed dynamic change in the DNA sequence. Thus, precisely recognizing AP sites is difficult, especially at the single-cell level. To address this issue, we provide a broad-spectrum strategy to design a group of molecular rotors, that is, a series of nonfluorescent 2-(4-vinylbenzylidene)malononitrile derivatives (BMN-Fluors), which constantly display molecular rotation in a free state. Interestingly, after activating the relevant specific-recognition reaction (i.e., hydrolysis reaction of benzylidenemalononitrile) only in the AP-site cavity within a short time (approximately 300 s), each of these molecules can be fixed into this cavity and can sequentially self-regulate to form different stable conformations in accordance with the cavity size. The different stable conformations possess various HOMO-LUMO energy gaps in their excited state. This condition enables the AP site to emit different fluorescence signals at various wavelengths. Given the different self-regulation abilities of the conformations, the series of molecules, BMN-Fluors, can emit different types of signals, including an "OFF-ON" single-channel signal, a "ratio" double-channel signal, and even a precise multichannel signal. Among the BMN-Fluors derivatives, d1-BMN can sequentially self-regulate to form five stable conformations, thereby resulting in the emission of a five-channel signal for different AP sites in situ. Thus, d1-BMN can be used as a probe to ultrasensitively recognize the AP site with precise fluorescent signals at the single-cell level. This design strategy can be generalized to develop additional single-channel to multichannel signal probes to recognize other specific sites in DNA sequences in living organisms.
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Affiliation(s)
- Beidou Feng
- Henan Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Key Laboratory of Green Chemical Media and Reactions; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , School of Chemistry and Chemical Engineering , School of Environment , College of Physics and Materials Science , Henan Normal University , Xinxiang 453007 , China .
| | - Kui Wang
- Henan Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Key Laboratory of Green Chemical Media and Reactions; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , School of Chemistry and Chemical Engineering , School of Environment , College of Physics and Materials Science , Henan Normal University , Xinxiang 453007 , China .
| | - Yonggang Yang
- Henan Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Key Laboratory of Green Chemical Media and Reactions; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , School of Chemistry and Chemical Engineering , School of Environment , College of Physics and Materials Science , Henan Normal University , Xinxiang 453007 , China .
| | - Ge Wang
- Xinxiang Medical University , Xinxiang 453000 , P. R. China
| | - Hua Zhang
- Henan Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Key Laboratory of Green Chemical Media and Reactions; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , School of Chemistry and Chemical Engineering , School of Environment , College of Physics and Materials Science , Henan Normal University , Xinxiang 453007 , China .
| | - Yufang Liu
- Henan Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Key Laboratory of Green Chemical Media and Reactions; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , School of Chemistry and Chemical Engineering , School of Environment , College of Physics and Materials Science , Henan Normal University , Xinxiang 453007 , China .
| | - Kai Jiang
- Henan Key Laboratory of Green Chemical Media and Reactions , Ministry of Education , Key Laboratory of Green Chemical Media and Reactions; Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals , Henan Key Laboratory of Organic Functional Molecules and Drug Innovation , School of Chemistry and Chemical Engineering , School of Environment , College of Physics and Materials Science , Henan Normal University , Xinxiang 453007 , China .
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Liang R, Tang F, Wang J, Yue Y. Photo-degradation dynamics of five neonicotinoids: Bamboo vinegar as a synergistic agent for improved functional duration. PLoS One 2019; 14:e0223708. [PMID: 31622381 PMCID: PMC6797178 DOI: 10.1371/journal.pone.0223708] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 09/26/2019] [Indexed: 11/18/2022] Open
Abstract
The effects of photo-degradation on the utilization of pesticides in agricultural production has been investigated. Various influencing factors were compared, with results showing that the initial pesticide concentration, light source, water quality and pH possessed different effects on neonicotinoids photo-degradation. The initial concentration and pH were found to be most critical effects. The photo-degradation rate decreased by a factor of 2-4 when the initial concentration increased from 5 mg L-1 to 20 mg L-1, particularly for acetamiprid and imidacloprid. The photo-degradation pathways and products of the five neonicotinoids were also investigated, with similar pathways found for each pesticide, except for acetamiprid. Degradation pathways mainly involved photo-oxidation processes, with products identified using liquid chromatography-quadrupole time-of-flight mass spectrometry (LC-Q-TOF-MS) found to be consistent with literature reported results. Bamboo vinegar exerted a photo-quenching effect on the neonicotinoids, with an improved efficiency at higher vinegar concentrations. The photo-quenching rates of thiamethoxam and dinotefuran were 381.58% and 310.62%, respectively, when a 30-fold dilution of vinegar was employed. The photo-degradation products in bamboo vinegar were identical to those observed in methanol, with acetic acid being the main factor influencing the observed quenching effects.
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Affiliation(s)
- Rui Liang
- School of Resource & Environment, Anhui Agricultural University, Hefei, China
| | - Feng Tang
- State Forestry Administration Key Open Laboratory, International Centre for Bamboo and Rattan, Beijing, China
| | - Jin Wang
- State Forestry Administration Key Open Laboratory, International Centre for Bamboo and Rattan, Beijing, China
| | - Yongde Yue
- State Forestry Administration Key Open Laboratory, International Centre for Bamboo and Rattan, Beijing, China
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Cai ZB, Shen HM, Zhou M, Li SL, Tian YP. Novel A–(π–D–π–A)1–3 branched fluorophores displaying high two-photon absorption. RSC Adv 2016. [DOI: 10.1039/c6ra02733d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel A–(π–D–π–A)3 compounds bearing pyridine end groups are apparently effective in achieving large two-photon responses owing to strong charge transfer.
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Affiliation(s)
- Zhi-Bin Cai
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Hai-Min Shen
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Mao Zhou
- Zhejiang Poly Pharmaceutical Co. Ltd
- Hangzhou 310009
- P. R. China
| | - Sheng-Li Li
- Department of Chemistry
- Anhui Province Key Laboratory of Functional Inorganic Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Yu-Peng Tian
- Department of Chemistry
- Anhui Province Key Laboratory of Functional Inorganic Materials
- Anhui University
- Hefei 230039
- P. R. China
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