EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Shuaijie Chen,Minghui Yang,Haihui Li,Haitao Zhao,Xiang Xu,Weiwei He,Lifen Zhang,Zhenping Cheng
Photoinduced reversible-deactivation radical polymerization (RDRP) has attracted great interest in virtue to their unique inherent advantages, such as low activation energy, environmentally benign reaction conditions and precision synthesis of designable functional polymeric materials. In this work, a facile and efficient strategy for preparing block copolymers was developed by the combination of near-infrared (NIR) light-controlled in-situ bromine-iodine transformation reversible-deactivation radical polymerization (BIT-RDRP) and purple LED light induced ring-opening polymerization (ROP). Herein, the macroinitiator was first synthesized via NIR light-controlled BIT-RDRP by using a bifunctional 2-hydroxyethyl 2-bromo-2-phenylacetate (EBP-OH) as the initiator at room temperature. Subsequently the block copolymers with narrow dispersity (low up to 1.06) were prepared by combination of purple LED light induced ROP through “two step” or “one pot” process. Importantly, the “one pot” strategy can greatly simplify the operation process and improve the synthesis efficiency, which will facilitate the batch preparation of block copolymers.
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
Kai Zhang,Zhenqiang Fan,Yue Huang,Yuedi Ding,Minhao Xie,Minghe Wang
In this work, we designed an ECL ratiometric biosensor with a three-stranded Y-type DNA (Y-DNA) probe and induced a hybridization chain reaction (HCR) for the highly sensitive detection of SARS-CoV-2 nucleic acid. The important component of this system is the self-assembled Y-Shaped probe based on three nucleic acids. Y1, Y2, and Y3 can be linked by complementary base pairing to Hairpin1 (H1), Hairpin2 (H2), and Ru modified DNA (Ru1), respectively. H1 and H2 can trigger the HCR reaction when activated by the SARS-CoV-2 RdRp gene and the 5′ end of Ru1. The 5′ end of Ru1 is modified with the Ru complex, which can produce a strong electrochemiluminescence luminescence signal at 620 nm under an applied voltage. Through the amplification of Y-DNA-induced HCR reaction, Ru1 on the electrode surface gradually increased, the ECL signal at 460 nm was gradually quenched, and the signal at 620 nm was steadily generated. The SARS-CoV-2 RdRp gene can be quantified according to the degree of decrease of ECL signal at 460 nm and the increase of ECL signal at 620 nm. Combining the two signal amplification strategies, this ratiometric ECL biosensor can accurately and efficiently detect the target gene with a detection limit of 59 aM.
研究领域:
生物医学工程
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分析化学
·
分子诊断学
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病毒学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Kai Zhang,Zhenqiang Fan,Yuedi Ding,Minhao Xie
In this work, we constructed an exonuclease III cleavage reaction-based isothermal amplification of nucleic acids with CRISPR/Cas12a-mediated pH-induced regenerative Electrochemiluminescence (ECL) biosensor for ultrasensitive and specific detection of SARS-CoV-2 nucleic acids for SARS-CoV-2 diagnosis. The triple-stranded nucleic acid in this biosensor has an extreme dependence on pH, which makes our constructed biosensor reproducible. This is essential for effective large-scale screening of SARS-CoV-2 in areas where resources are currently relatively scarce. Using this pH-induced regenerative biosensor, we detected the SARS-CoV-2 RdRp gene with a detection limit of 43.70 aM. In addition, the detection system has good stability and reproducibility, and we expect that this method may provide a potential platform for the diagnosis of COVID-19.
研究领域:
生物技术
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纳米技术
·
分子生物学
·
分析化学
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病毒学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Bo Yao,Jing Zhang,Zhenqiang Fan,Yuedi Ding,Bin Zhou,Runlin Yang,Jianfeng Zhao,Kai Zhang
The detection of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is crucial for preventing and controlling infectious diseases and disease treatment. In this work, a Au@Ti3C2@PEI-Ru(dcbpy)32+ nanocomposite-based electrochemiluminescence (ECL) biosensor was rationally designed, which realized sensitive detection of the RNA-dependent RNA polymerase (RdRp) gene of SARS-CoV-2. In addition, a DNA walker was also used to excise the hairpin DNAs under the action of Nb.BbvCI endonuclease. Furthermore, model DNA–Ag nanoclusters (model DNA–AgNCs) were used to quench the initial ECL signal. As a result, the ECL biosensor was used to sensitively detect the SARS-CoV-2 RdRp gene with a detection range of 1 fM to 100 pM and a limit of detection of 0.21 fM. It was indicated that the ECL biosensor had a great application potential for clinical medical detection. Furthermore, the DNA walker amplification also played a reliable candidate strategy for other detection methods.
研究领域:
生物传感器
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纳米技术
·
病毒学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 48
·2209743
·
IF 19.924
Yi-Xuan Li,Jing Li,Dunru Zhu,Ju-Zheng Wang,Guo-Fang Shu,Junji Li,Sheng-Li Zhang,Xue-Ji Zhang,Serge Cosnier,Hai-Bo Zeng,Dan Shan
High electrocatalytic activity with tunable luminescence is crucial for the development of electrochemiluminescence (ECL) luminophores. In this study, a porphyrin-based heterobimetallic 2D metal organic framework (MOF), [(ZnTCPP)Co 2 (MeIm)] (1), is successfully self-assembled from the zinc(II) tetrakis(4-carboxyphenyl)porphine (ZnTCPP) linker and cobalt(II) ions in the presence of 2-methylimidazole (MeIm) by a facile one-pot reaction in methanol at room temperature. On the basis of the experimental results and the theoretical calculations, the MOF 1 contains paddle–wheel [Co 2 (-CO 2 ) 4 ] secondary building units (SBUs) axially coordinated by a MeIm ligand, which is very beneficial to the electron transfer between the Co(II) ions and oxygen. Combining the photosensitizers ZnTCPP and the electroactive [Co 2 (-CO 2 ) 4 ] SBUs, the 2D MOF 1 possesses an excellent ECL performance, and can be used as a novel ECL probe for rapid nonamplified detection of the RdRp gene of SARS-CoV-2 with an extremely low limit of detection (≈30 aM).
研究领域:
材料科学
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分析化学
·
病毒学
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产品关联
DOI
PubMed
高影响因子
Microorganisms
·
2025
·Vol. 14
·期 1
·11
·
IF 4.2
Qianxin Lu,Huisha Du,Xin Jiang,Bingwen Zeng,Tianhui Li,Ying-Chun Dai
The GI.3 norovirus is the most detected and recombinant-rich genotype within genogroup I, yet the mechanistic basis for its epidemiological success remains poorly understood. This study integrates Bayesian evolutionary analysis with in vitro enzymology to investigate the link between RdRp function and the evolutionary dynamics of GI.3 NoV. We analyzed 831 GI.3 sequences, finding that prevalent strains (GI.3[P3] and GI.3[P13]) exhibited significantly higher evolutionary rates in both the RdRp and VP1 genes than non-prevalent strains (GI.3[P10] and GI.3[P14]). While the RdRp gene displayed a strong molecular clock signal, the VP1 gene’s evolution was more complex, showing cluster-specific trends. Functionally, the RdRps from prevalent strains demonstrated superior enzymatic activity and substrate affinity (Km: GI.3[P13] = 0.092 mM; GI.3[P3] = 0.176 mM) compared to non-prevalent strains (Km: GI.3[P14] = 0.273 mM). Notably, GI.3 RdRp required higher manganese ion concentrations for optimal activity than previously reported for GII strains, suggesting a potential biochemical constraint. Our findings demonstrate a clear correlation between RdRp enzymatic efficiency, evolutionary rate, and strain prevalence. We propose that a highly active RdRp may potentially accelerate VP1 evolution and confer a replicative advantage, underpinning the dominance of specific GI.3 lineages. This work provides crucial experimental evidence linking viral polymerase function to evolutionary and epidemiological outcomes.
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Shusu Ren,Xiang Xu,Jiyuan Sun,Haitao Zhao,Weiwei He,Lifen Zhang,Zhenping Cheng
Antimicrobial resistance is still a major clinical challenge worldwide today and the development of novel antimicrobial agents with high antimicrobial activity and low bacterial resistance is of great importance. In this work, quaternized 2-(dimethylamino) ethylmethacrylates iodonium salt-type monomers with different lengths of pendent alkyl (qDMAEMA(C x ), x = 3, 6 and 8) are synthesized for preparation of a series of cationic porphyrin-based star-shaped (co)polymers by photo-controlled bromine-iodine transformation reversible-deactivation radical polymerization (BIT-RDRP). Especially, qDMAEMA(C x ) not only acts as a monomer but also can be used as an intrinsic catalyst for the BIT-RDRP. In addition, effects of alkyl chain length (x), degree of polymerization and hydrophilic-hydrophobic balance ( H.L.B. ) on the antibacterial activity of the prepared (co)polymers are investigated. The resulting zinc ion coordinated copolymers [email protected] (qDMAEMA(C 8 ) 20 - co -PEGMA 35 ) (denoted as [email protected] ) exhibits good water solubility and is able to be absorbed effectively on the surfaces of bacteria, exhibiting excellent photodynamic inhibition activity against both S. aureus and E. coli under irradiation with 570 nm light source according to the coated plate experiments. The minimum bactericidal concentration (MBC) of [email protected] against S. aureus and E. coli are 1.5 and 2.0 μM, respectively, in the presence of light. Meanwhile, [email protected] shows quite low cytotoxicity and satisfying photolysis ability at working concentrations, displaying promising biological application prospects.
研究领域:
高分子化学
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材料科学
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生物医学工程
·
微生物学
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产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2015
·Vol. 72
·期 10
·2455-2469
·
IF 1.438
Bai Liangjiu,Wang Dongju,Chen Hou,Li Dongxin,Xu Yuanyuan,Yu Lili,Wang Wenxiang
Abstract Peanut shell (PNS) was used to prepare a novel adsorbent to achieve resource recovery of the agricultural residue. The hydroxyl groups of peanut shell were turned into –C(CH 3 ) 2 –Br pendant groups to initiate polymerization of acrylonitrile. Graft copolymer peanut shell/polyacrylonitrile (PNS- g -PAN) was modified by hydroxylamine hydrochloride to transform the cyano groups into amidoxime (AO) groups. The modified copolymer of AO-PNS- g -PAN was used as adsorbent. The maximum adsorption capacity for Hg(II) was 4.45 mmol g −1 . The adsorption process fitted well the Freundlich isotherm model and followed pseudo-second-order model. The modified copolymer demonstrated its potential as an efficient adsorbent to solve the problem of Hg(II) contamination. Graphical abstract The peanut shell (PNS) macroinitiator was obtained by acylation of hydroxyl groups on the cellulose backbone of the peanut shell and initiated by Cu(0)-mediated RDRP of acrylonitrile. PNS- g -PAN was modified by NH 2 OH·HCl and used to remove heavy metal ions. The maximum adsorption capacity of Hg(II) was 4.45 mmol g −1 .
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Zhenqiang Fan,Bo Yao,Yuedi Ding,Jing Zhao,Minhao Xie,Kai Zhang
Dependable, specific and rapid diagnostic methods for severe acute respiratory syndrome β -coronavirus (SARS-CoV-2) detection are needed to promote public health interventions for coronavirus disease 2019 (COVID-19). Herein, we have established an entropy-driven amplified electrochemiluminescence (ECL) strategy to detect the RNA-dependent RNA polymerase (RdRp) gene of SARS-CoV-2 known as RdRp-COVID which as the target for SARS-CoV-2 plays an essential role in the diagnosis of COVID-19. For the construction of the sensors, DNA tetrahedron (DT) is modified on the surface of the electrode to furnish robust and programmable scaffolds materials, upon which target DNA-participated entropy-driven amplified reaction is efficiently conducted to link the Ru (bpy) 3 2+ modified S3 to the linear ssDNA at the vertex of the tetrahedron and eventually present an “ECL on” state. The rigid tetrahedral structure of the DT probe enhances the ECL intensity and avoids the cross-reactivity between single-stranded DNA, thus increasing the sensitivity of the assays. The enzyme-free entropy-driven reaction prevents the use of expensive enzyme reagents and facilitates the realization of large-scale screening of SARS-CoV-2 patients. Our DT-based ECL sensor has demonstrated significant specificity and high sensitivity for SARS-CoV-2 with a limit of detection (LOD) down to 2.67 fM. Additionally, our operational method has achieved the detection of RdRp-COVID in human serum samples, which supplies a reliable and feasible sensing platform for the clinical bioanalysis.
研究领域:
生物医学
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分子诊断学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Virology Journal
·
2025
·Vol. 22
·期 1
·1-14
·
IF 3.8
Liu Xianglan,Hu Jiaming,Wu Jiarui,Tian Yiru,Wang Jinbo,Wu Chunyan,Chen Qingfeng,Krall Leonard,He Yanping,Lu Qun
Background Human norovirus (HNV) is the predominant pathogen causing outbreaks of acute gastroenteritis globally. Despite significant efforts to combat norovirus infections, there is currently no FDA approved vaccine or antiviral drug available. Consequently, the development of effective antiviral agents is of critical importance. Methods and results In this study, a series of 41 5-cyano-2-thiacetyl aromatic pyrimidinone compounds were designed and synthesized. A cell viability-based screening for anti-murine norovirus (MNV) compounds was conducted, revealing that compound 29 (hereafter used as Co-29) exhibited antiviral activity against MNV. Co-29 demonstrated effective inhibition of MNV CW3 RNA replication, exhibiting an EC 50 of 58.22 μM. An RdRp enzyme activity assay indicated that Co-29 directly inhibits RdRp activity to both MNV and HNV. Molecular docking studies suggested that Co-29 interacts with the palm region of RdRp via hydrogen bonding with specific residues, which are conserved in RdRps across MNV and HNV norovirus variants. Conclusions In conclusion, our study suggests that the newly synthesized Co-29 may serve as a potential antiviral candidate or lead compound for future studies.
研究领域:
病毒学
·
药物化学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Feifei Li,Lin Zhou,Ziqi Zhang,Mengmeng Li,Lin Lei
A facial white light-emitting diode (LED) induced reversible deactivation radical polymerization (RDRP) of methacrylate monomers was successfully conducted by using sub-ppm-level organic dyes as organocatalysts. The organic dyes contained Eosin B (EB), Rose bengal (RB), Eosin Y (EY) and 3,3,5,5-Tetraiodophenolsulfonphthalein (TIPS) with the merits of metal free, non-toxic and inexpensive. The resulted poly (methacrylate) with controlled molecular weights and polydispersity indices were obtained either under white LED irradiation or green and blue LED. The polymerization of various functional methacrylates demonstrated that this polymerization system with dyes as organocatalysts had high monomer versatility. Chain extensions copolymerization verified the living features of reversible deactivation radical polymerization.
研究领域:
高分子化学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Jihua Wei,Zichun Song,Jiuying Cui,Yuanxun Gong,Qianli Tang,Kai Zhang,Xinlei Song,Xianjiu Liao
In this study, we introduce an electrochemiluminescence (ECL) sensing platform based on the "Entropy-driven triggered T7 amplification-CRISPR/Cas13a system" (EDT-Cas). This platform combines a programmable entropy-driven cycling strategy, T7 RNA polymerase, and the CRISPR/Cas13a system to amplify the determination of the SARS-CoV-2 RdRp gene. The Ti 3 C 2 T x -compliant ECL signaling molecule offers unique benefits when used with the ECL sensing platform to increase the assay sensitivity and the electrode surface modifiability. To obtain the T7 promoter, the SARS-CoV-2 RdRp gene may first initiate an entropy-driven cyclic amplification response. Then, after recognizing the T7 promoter sequence on the newly created dsDNA, T7 RNA polymerase starts transcription, resulting in the production of many single-stranded RNAs (ssRNAs), which in turn trigger the action of CRISPR/Cas13a. Finally, Cas13a/crRNA identifies the transcribed ssRNA. When it cleaves the ssRNA, many DNA reporter probes carrying -U-U- are cleaved on the electrode surface, increasing the ECL signal and allowing for the rapid and highly sensitive detection of SARS-CoV-2. With a detection limit of 7.39 aM, our method enables us to locate the SARS-CoV-2 RdRp gene in clinical samples. The detection method also demonstrates excellent repeatability and stability. The SARS-CoV-2 RdRp gene was discovered using the "Entropy-driven triggered T7 amplification-CRISPR/Cas13a system" (EDT-Cas). The developed ECL test had excellent recoveries in pharyngeal swabs and environmental samples. It is anticipated to offer an early clinical diagnosis of SARS-CoV-2 and further control the spread of the pandemic.
研究领域:
生物技术
·
分子生物学
·
病毒学
·
诊断技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）