1
|
Liu H, Al-Dhabi NA, Jiang H, Liu B, Qing T, Feng B, Ma T, Tang W, Zhang P. Toward nitrogen recovery: Co-cultivation of microalgae and bacteria enhances the production of high-value nitrogen-rich cyanophycin. Water Res 2024; 256:121624. [PMID: 38669903 DOI: 10.1016/j.watres.2024.121624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/11/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024]
Abstract
The algal-bacterial wastewater treatment process has been proven to be highly efficient in removing nutrients and recovering nitrogen (N). However, the recovery of the valuable N-rich biopolymer, cyanophycin, remains limited. This research explored the synthesis mechanism and recovery potential of cyanophycin within two algal-bacterial symbiotic reactors. The findings reveal that the synergy between algae and bacteria enhances the removal of N and phosphorus. The crude contents of cyanophycin in the algal-bacterial consortia reached 115 and 124 mg/g of mixed liquor suspended solids (MLSS), respectively, showing an increase of 11.7 %-20.4 % (p < 0.001) compared with conventional activated sludge. Among the 170 metagenome-assembled genomes (MAGs) analyzed, 50 were capable of synthesizing cyanophycin, indicating that cyanophycin producers are common in algal-bacterial systems. The compositions of cyanophycin producers in the two algal-bacterial reactors were affected by different lighting initiation time. The study identified two intracellular synthesis pathways for cyanophycin. Approximately 36 MAGs can synthesize cyanophycin de novo using ammonium and glucose, while the remaining 14 MAGs require exogenous arginine for production. Notably, several MAGs with high abundance are capable of assimilating both nitrate and ammonium into cyanophycin, demonstrating a robust N utilization capability. This research also marks the first identification of potential horizontal gene transfer of the cyanophycin synthase encoding gene (cphA) within the wastewater microbial community. This suggests that the spread of cphA could expand the population of cyanophycin producers. The study offers new insights into recycling the high-value N-rich biopolymer cyanophycin, contributing to the advancement of wastewater resource utilization.
Collapse
Affiliation(s)
- Hongyuan Liu
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Huiling Jiang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Bingzhi Liu
- Faculty of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
| | - Taiping Qing
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Bo Feng
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Tengfei Ma
- National Research Base of Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing 400067, China
| | - Wangwang Tang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
| | - Peng Zhang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| |
Collapse
|
2
|
Wang J, Liu H, Peng MW, Qing T, Feng B, Zhang P. Amoxicillin degradation and high-value extracellular polymer recovery by algal-bacterial symbiosis systems. J Hazard Mater 2023; 460:132344. [PMID: 37611392 DOI: 10.1016/j.jhazmat.2023.132344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 08/13/2023] [Accepted: 08/17/2023] [Indexed: 08/25/2023]
Abstract
Algal-bacterial symbiosis systems have emerged as sustainable methods for the treatment of new pollutants and the recovery of resources. However, the bio-refinery of biomass derived from microalgae is inefficient and expensive. In order to simultaneously degrade antibiotic and recover resources efficiently, two algal-bacterial symbiosis systems were constructed using Pseudomonas aeruginosa (alginate overproduction) and Bacillus subtilis (poly-γ-glutamic acid overproduction) with amoxicillin-degrading-microalga Prototheca zopfii W1. The optimal conditions for W1 to degrade amoxicillin are 35 °C, pH 7, and 180 rpm. In the presence of 5-50 mg/L of amoxicillin, W1-P. aeruginosa and W1-B. subtilis exhibit higher amoxicillin degradation and produce more extracellular polymers than W1 or bacteria alone. The metabolomic analysis demonstrates that the algal-bacterial symbiosis enhances the tolerance of W1 to amoxicillin by altering carbohydrate metabolism and promotes the production of biopolymers by upregulating the precursors synthesis. Moreover, the removal of amoxicillin (10 mg/L) from livestock effluent by W1-P. aeruginosa and W1-B. subtilis is greater than 90 % in 3 days, and the maximum yields of alginate and poly-γ-glutamate are 446.1 and 254.3 mg/g dry cell weight, respectively. These outcomes provide theoretical support for the application of algal-bacterial symbiosis systems to treatment of amoxicillin wastewater and efficient production of biopolymers.
Collapse
Affiliation(s)
- Jingyu Wang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Hongyuan Liu
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | | | - Taiping Qing
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Bo Feng
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Peng Zhang
- Department of Environment, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| |
Collapse
|
3
|
Zeng Z, Wang X, Yang T, Li Y, Liu X, Zhang P, Feng B, Qing T. Transition metal-doped germanium oxide nanozyme with enhanced enzyme-like activity for rapid detection of pesticide residues in water samples. Anal Chim Acta 2023; 1245:340861. [PMID: 36737136 DOI: 10.1016/j.aca.2023.340861] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/15/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023]
Abstract
Designing highly active nanozymes for bioanalysis and environmental sensing remains a challenge. In this study, transition metal, palladium (Pd) and iron (Fe), doped germanium oxide (GeO2) nanozyme was designed and optimized. Compared with the pristine GeO2 nanozyme, the transition metal doped GeO2 nanozyme have lower Michaelis-Menten constants and higher catalytic activity, indicating that the Pd and Fe doped GeO2 nanozyme not only enhance their affinity for the substrate but also improve its catalytic activity. In addition, a colorimetric sensor based on the GeO2@Pd-H2O2-TMB system was constructed for the visual detection of simazine in water samples due to the good affinity between TMB and simazine. This sensor has good selectivity and sensitivity with a detection limit of 6.21 μM because of the highest catalytic performance of GeO2@Pd nanozyme. This study broadens the application of nanozymes in environmental field and other nanozymes can also be enhanced in activity by simple transition metal doping.
Collapse
Affiliation(s)
- Zihang Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Xujun Wang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Tianhui Yang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Yuanyuan Li
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Xiaofeng Liu
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China.
| |
Collapse
|
4
|
Yang T, Liu X, Zeng Z, Wang X, Zhang P, Feng B, Tian K, Qing T. Efficient and recyclable degradation of organic dye pollutants by CeO 2@ZIF-8 nanozyme-based non-photocatalytic system. Environ Pollut 2023; 316:120643. [PMID: 36372366 DOI: 10.1016/j.envpol.2022.120643] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Advanced oxidation processes-based catalysis system as the most typical pollutant degradation technology always suffer from poor durability and photo-dependent. Inspired by the fact that some nanomaterials exhibit catalytic properties closer to natural enzymes, a high peroxidase-like activity and stability CeO2@ZIF-8 nanozyme was synthesized in this study for non-photodegradation of dyes pollution. Multiple characterization techniques were applied to prove the successful synthesis of the nanozyme. The influence of different parameters on the catalytic degradation of organic dye by nanozyme was investigated. This nanozyme achieved a maximum degradation efficiency of 99.81% for methyl orange and maintained its catalytic performance in repeated experiments. Possible degradation intermediates and pathways for methyl orange were then proposed. In addition, the CeO2@ZIF-8 loaded starch/agarose films were prepared for the portable and recyclable remediation of real dye wastewater, which maintained more than 80% degradation efficiency after 5 successive cycles. These results suggested that nanozyme based non-photocatalytic system is a potential catalyst for dye degradation and it opens a new avenue to develop high-performance and recyclable catalysts for pollutant remediation.
Collapse
Affiliation(s)
- Tianhui Yang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Xiaofeng Liu
- Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, 411105, China
| | - Zihang Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Xujun Wang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Ke Tian
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China.
| |
Collapse
|
5
|
Huang Y, Zou K, Qing T, Feng B, Zhang P. Metagenomics and metatranscriptomics analyses of antibiotic synthesis in activated sludge. Environ Res 2022; 213:113741. [PMID: 35750126 DOI: 10.1016/j.envres.2022.113741] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 05/23/2022] [Accepted: 06/18/2022] [Indexed: 06/15/2023]
Abstract
The generic of antibiotics is considered to be a main reason for the generation of antibiotic resistance genes (ARGs) in wastewater treatment plants (WWTPs). However, little has been reported about the antibiotic biosynthesis by activated sludge. In this study, the distribution and expression of antibiotic biosynthetic genes (ABGs) in the floc sludge and biofilm from two WWTPs were deciphered using metagenomics and metatranscriptomics. The results showed that 2% of the community were in general well-linked to antibiotic production, indicating a non-negligible antibiotic synthetic ability of WWTPs. 93 ABGs belonging to 26 antibiotics were determined, among which aminoglycosides, β-lactams, ansamycins, peptides, macrolides were majority. The relative abundances of detected ABGs had a large interval, ranging from 0.000006% to 0.042%. The predominant antibiotic types of synthetic genes with higher relative expression levels were monobactams, penicillin & cephalosporins and streptomycin, primarily belonging to β-lactams and aminoglycosides. The hypothetical synthetic pathways of streptomycin synthesis and penicillin & cephalosporin synthesis were proposed. And the coexistence of ABGs and ARGs for these two antibiotics was also pronounced in activated sludge from meta-omics data. These findings for the first time demonstrated the antibiotic synthetic potential in activated sludges, revealing new sources of antibiotics and resistance genes in WWTPs, and thereby aggravating environmental pollution.
Collapse
Affiliation(s)
- Yu Huang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China
| | - Kui Zou
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, China.
| |
Collapse
|
6
|
Zhang P, Yuan L, Zeng J, Zou K, Liu B, Qing T, Feng B. Alginate production of Pseudomonas strains and its application in preparation of alginate-biomass hydrogel for heavy metal adsorption. Int J Biol Macromol 2022; 222:1511-1521. [DOI: 10.1016/j.ijbiomac.2022.09.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/21/2022] [Accepted: 09/27/2022] [Indexed: 11/29/2022]
|
7
|
Zhu J, Wang J, Chen YP, Qing T, Zhang P, Feng B. Quantitative proteomics and phosphoproteomics elucidate the molecular mechanism of nanostructured TiO 2-stimulated biofilm formation. J Hazard Mater 2022; 432:128709. [PMID: 35325859 DOI: 10.1016/j.jhazmat.2022.128709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 02/08/2022] [Accepted: 03/12/2022] [Indexed: 06/14/2023]
Abstract
With the increasing concerns regarding bacterial adaption to nanomaterials, it is critical to explore the main mechanism behind the adaptive morphogenesis of microorganisms. In this work, the biofilms formed from activated sludge exposed to 5 and 50 mg/L nTiO2 in the dark had increased biomass and selectively enriched pathogens. To further elaborate adaptive mechanism of biofilm formation induced by nTiO2, the protein response and protein phosphorylation modification of Escherichia coli K12 were determined using integrative systems biology analyses of proteomics and phosphoproteomics. Results identified that E. coli cultivated with nTiO2 considerably upregulated iron acquisition, and regulated protein phosphorylation states associated with of transcription and translation and biofilm formation relative to unexposed controls. Accordingly, bacteria increased siderophores and exopolysaccharide content (increased by about 57% and 231%, respectively), and enhanced resistance to transcriptional inhibitory antibiotics. Moreover, a dose of an iron chelator, i.e., deferoxamine mesylate salt, effectively retarded the biofilm development of bacteria exposed to 50 mg/L nTiO2. Overall, this work will provide a new insight for biofouling control, and contribute to an improved understanding of microbial adaption to nanomaterials.
Collapse
Affiliation(s)
- Jing Zhu
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Jingyu Wang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - You-Peng Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, China
| |
Collapse
|
8
|
Qin L, Feng B, Luo Q, Zeng Z, Zhang P, Ye X, Qing T. Copper ion and G-quadruplex-mediated fluorescent sensor for highly selective detection of bleomycin in actual samples. Spectrochim Acta A Mol Biomol Spectrosc 2022; 267:120572. [PMID: 34753707 DOI: 10.1016/j.saa.2021.120572] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
Improper dosage of Bleomycin (BLM) can easily lead to a series of side effects such as pulmonary fibrosis and pulmonary toxicity. Therefore, detecting the content of BLM in actual sample is very helpful to make full use of its therapeutic efficacy and reduce its toxicity. Herein, we constructed a copper ion and G-quadruplex mediated label-free sensor to detect BLM. The strategy mainly relies on the chelation of BLM to copper ions, which makes the copper ions lose the quenching ability to the fluorescent dye N-methylmesoporphyrin (NMM) after chelation. With the assistance of the G-quadruplex, the BLM content in the sample can be detected by observing the change in fluorescence. A good linear relationship can be clearly observed within the BLM concentration range of 0.1 nM-75 nM, and the limit of detection was derived as 0.1 nM. This sensor did not involve any labeling or addition of Fe2+, even in the presence of 10 different antibiotics and 11 different metal ions, it still has a good monitoring effect, and can be successfully applied to the detection of BLM in serum and wastewater. Thus, we believe that this work hold great potential in antibiotic monitoring and environmental protection.
Collapse
Affiliation(s)
- Lingfeng Qin
- College of Environment and Resources, Xiangtan University, Xiangtan 411105 Hunan Province, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105 Hunan Province, China
| | - Qi Luo
- College of Environment and Resources, Xiangtan University, Xiangtan 411105 Hunan Province, China
| | - Zihang Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105 Hunan Province, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105 Hunan Province, China
| | - Xiaosheng Ye
- Xiangya School of Public Health, Central South University, Changsha 410078 Hunan Province, China.
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan 411105 Hunan Province, China.
| |
Collapse
|
9
|
Luo Q, Qin L, Zhang P, Feng B, Ye X, Qing T, Qing Z. A persistent luminescent nanobeacon for practical detection of lead ions via avoiding background interference. Anal Chim Acta 2022; 1198:339555. [DOI: 10.1016/j.aca.2022.339555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/22/2022] [Accepted: 01/24/2022] [Indexed: 01/22/2023]
|
10
|
Li S, Zeng Z, Zhao C, Wang H, Ye X, Qing T. Nucleoside-regulated catalytic activity of copper nanoclusters and their application for mercury ion detection. NEW J CHEM 2022. [DOI: 10.1039/d1nj05525a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, a novel method for the synthesis of copper nanoclusters is developed using nucleosides as templates and hydroxylamine hydrochloride as the reductant. Various nucleosides can regulate the catalytic activity of copper nanoclusters.
Collapse
Affiliation(s)
- Shiyan Li
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Zihang Zeng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Congcong Zhao
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Haoyu Wang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Xiaosheng Ye
- Xiangya School of Public Health, Central South University, Changsha 410078, Hunan Province, China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| |
Collapse
|
11
|
Pan J, Jiang H, Qing T, Zhang J, Tian K. Transformation and kinetics of chlorine-containing products during pyrolysis of plastic wastes. Chemosphere 2021; 284:131348. [PMID: 34214932 DOI: 10.1016/j.chemosphere.2021.131348] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 06/18/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Pyrolysis can not only effectively dispose of plastic wastes but also reclaim valuable chemicals and biochar. However, the production and release of second pollutants, particularly chlorine-containing products, have been neglected. The mechanism for the transformation of chlorine during the pyrolysis of plastic wastes remains unclear. Herein, a thermogravimetric Fourier transform infrared mass spectrometry technology was used to investigate the migration and transformation of substances during the pyrolysis of polyvinyl chloride (PVC) plastic from 200 °C to 900 °C with heating rates of 5, 50, 100, 150, and 200 K min-1. Results show the first stage of weight loss is at 200 °C-360 °C, where the dehydrochlorination of PVC mainly occurred, accompanied by the formation of conjugated double bonds and a small number of hydrocarbon compounds. The second stage of weight loss is at 360 °C-550 °C, where the breakage and rearrangement of the long polyethene chain may occur. Kinetics analysis shows the higher activation energy value is in the second stage, which indicates that the second stage reaction is less likely to occur and the Flynn-Wall-Ozawa method is more suitable for the study of plastic pyrolysis kinetics. This study suggests that second pollutants can be minimized during controllable pyrolysis.
Collapse
Affiliation(s)
- Jing Pan
- Xiangtan University School of Environment and Resources, Xiangtan University, Xiangtan, 411100, China
| | - Hong Jiang
- Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Taiping Qing
- Xiangtan University School of Environment and Resources, Xiangtan University, Xiangtan, 411100, China
| | - Junfeng Zhang
- Xiangtan University School of Environment and Resources, Xiangtan University, Xiangtan, 411100, China
| | - Ke Tian
- Xiangtan University School of Environment and Resources, Xiangtan University, Xiangtan, 411100, China.
| |
Collapse
|
12
|
Xu J, Qing T, Jiang Z, Zhang P, Feng B. Graphene oxide-regulated low-background aptasensor for the "turn on" detection of tetracycline. Spectrochim Acta A Mol Biomol Spectrosc 2021; 260:119898. [PMID: 33993024 DOI: 10.1016/j.saa.2021.119898] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/21/2021] [Accepted: 04/30/2021] [Indexed: 06/12/2023]
Abstract
Tetracyclines (TC) are a common antibiotic for using in livestock breeding and healthcare; however, due to the inappropriate application of TCs, more than 75% of TCs are excreted and released into the environment in an active form through human and animal urine and feces, which results in high levels of TCs in the ecological system, causing adverse effects on the food safety and human health. Thus, the high-performance monitoring of TC pollution is necessary. In this work, a highly sensitive fluorescent aptasensor was developed that was based on graphene oxide (GO) regulation of low background signal and target-induced fluorescence restoration. In the absence of analyte, the DNA probe (TC aptamer) was adsorbed completely by GO and failed to enhance the fluorescence of SYBR gold (SG), thereby resulting in a low background signal. When the TC-included samples were added, the DNA probe formed an aptamer-TC complex, thereby separating from the surface of the GO and inducing the fluorescence of SG. Under optimal conditions, the proposed strategy could detect TC concentrations of less than 6.2 × 10-3 ng mL-1, which is four orders of magnitude better than the detection limit of the "turn off" mode (53.9511 ng mL-1). Moreover, this aptasensor has been used to detect TC from milk samples and wastewater samples, and its satisfactory performances demonstrate that the proposed strategy can be applied in practice for TC monitor in food safety and environmental protection. Therefore, we believe that this work is meaningful in pollution monitoring, environment restoration and emergency treatment.
Collapse
Affiliation(s)
- Jin Xu
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Zixin Jiang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan Province, China.
| |
Collapse
|
13
|
Fu Q, Long C, Qin L, Jiang Z, Qing T, Zhang P, Feng B. Fluorescent and colorimetric dual-mode detection of tetracycline in wastewater based on heteroatoms-doped reduced state carbon dots. Environ Pollut 2021; 283:117109. [PMID: 33878685 DOI: 10.1016/j.envpol.2021.117109] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 04/02/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
A large amount of tetracycline (TC) persists in water, soil, food, and feed due to the overuse of antibiotics, causing serious environmental problems such as damage to ecosystems and posing risks to human health. Thus, there is an urgent need to find a method to detect TC that is practical, rapid, sensitive, and offers ready visualization of TC levels so that adequate remediation measures can be immediately implemented. Herein, we report a fluorescent and colorimetric dual-mode nanosensor for the detection of TC based on reduced state carbon dots (r-CDs). In the presence of TC, the emission fluorescence of r-CDs was quenched by the Förster resonance energy transfer mechanism to achieve high-sensitivity detection of TC with a low limit of detection (LOD) of 1.73 nM. Moreover, TC was also detected by r-CDs via a noticeable color change of the solution (from colorless to red) with the naked eye, having an LOD of 0.46 μM. Furthermore, r-CDs have excellent selectivity and sensitivity in detecting TC in wastewater, and therefore, have practical applications in wastewater treatment. The fluorescent and colorimetric dual-mode proposed in this work may offer a unique idea for the detection of TC, with great prospects for environmental wastewater applications.
Collapse
Affiliation(s)
- Qing Fu
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Caicheng Long
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Lingfeng Qin
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Zixin Jiang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China.
| |
Collapse
|
14
|
Long C, Li X, Jiang Z, Zhang P, Qing Z, Qing T, Feng B. Adsorption-improved MoSe 2 nanosheet by heteroatom doping and its application for simultaneous detection and removal of mercury (II). J Hazard Mater 2021; 413:125470. [PMID: 33930977 DOI: 10.1016/j.jhazmat.2021.125470] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 02/02/2021] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Water pollution arising from heavy metal ions continues to be a major environmental problem, which represents a serious threat to human beings and animals worldwide. New materials that can simultaneously detect and remove these toxic ions are urgently required. Herein, nitrogen and sulfur co-doped molybdenum selenide nanosheets (N, S-MoSe2) were prepared and found to be fluorescently responsive to mercury (II) with an improved adsorption capacity (208.33 mg g-1), thereby providing the possibility for the simultaneous detection and removal of mercury (II) in water samples. The great affinity was the result of the complexation of mercury (II) with Se and S atoms in N, S-MoSe2 as well as the electrostatic adsorption of cation mercury (II) on negatively charged N, S-MoSe2. Besides good sensitivity and selectivity toward mercury (II), N, S-MoSe2 displayed a relatively consistent performance under a wide pH range from 3 to 10. The removal efficiency reached 87.5% with fast adsorption kinetics, and N, S-MoSe2 could be reused after simple treatment. Thus, this work is expected to provide new material for the detection and removal of mercury (II) in an aqueous solution and offer an insight into the interaction between heavy metal ions and inorganic nanomaterials.
Collapse
Affiliation(s)
- Caicheng Long
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Xiao Li
- College of Chemistry, Nankai University, Tianjin 300110, China
| | - Zixin Jiang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Zhihe Qing
- Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, Hunan, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan 411105, Hunan, China.
| |
Collapse
|
15
|
Liu J, Wang T, Xiao B, Deng M, Yu P, Qing T. Fluorometric determination of the breast cancer 1 gene based on the target-induced conformational change of a DNA template for copper nanoclusters. Anal Methods 2021; 13:712-718. [PMID: 33480889 DOI: 10.1039/d0ay01712d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The breast cancer 1 (BRCA1) gene is a tumor suppressor gene, whose mutation is closely related to breast cancer. Therefore, the sensitive detection of the BRCA1 gene is extremely important for human health, particularly for women. In this study, a label-free fluorescent method based on hairpin DNA-templated copper nanoclusters (CuNCs) was for the first time developed for the detection of the BRCA1 gene. In the absence of target DNA, the detection system showed a strong red emission and produced a high emission peak. However, in the presence of the BRCA1 gene, the DNA probe hybridized with the BRCA1 gene and conformation of the DNA probe changed. As a result, the amount of produced CuNCs decreased and a low emission peak was obtained. The fluorescence intensity of the detection system was linearly correlated with the concentration of the BRCA1 gene ranging from 2 nM to 600 nM. The detectable limit was 2 nM for the BRCA1 gene assay, which was comparable with those reported by other non-amplifying sensors. Moreover, the developed method showed satisfactory recoveries for the BRCA1 gene assay in the bovine serum. The DNA-templated CuNC-based fluorescent assay thus offered a promising platform for the diagnosis of a breast cancer biomarker.
Collapse
Affiliation(s)
- Jing Liu
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, PR China.
| | | | | | | | | | | |
Collapse
|
16
|
Jiang Z, Feng B, Xu J, Qing T, Zhang P, Qing Z. Graphene biosensors for bacterial and viral pathogens. Biosens Bioelectron 2020; 166:112471. [PMID: 32777726 PMCID: PMC7382337 DOI: 10.1016/j.bios.2020.112471] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/14/2020] [Accepted: 07/21/2020] [Indexed: 02/06/2023]
Abstract
The infection and spread of pathogens (e.g., COVID-19) pose an enormous threat to the safety of human beings and animals all over the world. The rapid and accurate monitoring and determination of pathogens are of great significance to clinical diagnosis, food safety and environmental evaluation. In recent years, with the evolution of nanotechnology, nano-sized graphene and graphene derivatives have been frequently introduced into the construction of biosensors due to their unique physicochemical properties and biocompatibility. The combination of biomolecules with specific recognition capabilities and graphene materials provides a promising strategy to construct more stable and sensitive biosensors for the detection of pathogens. This review tracks the development of graphene biosensors for the detection of bacterial and viral pathogens, mainly including the preparation of graphene biosensors and their working mechanism. The challenges involved in this field have been discussed, and the perspective for further development has been put forward, aiming to promote the development of pathogens sensing and the contribution to epidemic prevention.
Collapse
Affiliation(s)
- Zixin Jiang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Bo Feng
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China.
| | - Jin Xu
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China.
| | - Peng Zhang
- College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan Province, China
| | - Zhihe Qing
- Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan Province, China.
| |
Collapse
|
17
|
Lei T, Huang T, Wang T, Yu P, Qing T, Nie B. Nano-fluorescent probes based on DNA-templated copper nanoclusters for fast sensing of thiocyanate. NEW J CHEM 2020. [DOI: 10.1039/d0nj03742g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A fast and label-free fluorescent sensor was developed to determine SCN−via inhibiting the formation of DNA-templated copper nanoclusters (CuNCs).
Collapse
Affiliation(s)
- Tao Lei
- School of Materials Science and Engineering
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Ting Huang
- School of Materials Science and Engineering
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Tianze Wang
- School of Materials Science and Engineering
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Peng Yu
- School of Materials Science and Engineering
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Taiping Qing
- College of Environment and Resources
- Xiangtan University
- Xiangtan 411105
- P. R. China
| | - Beixi Nie
- School of Materials Science and Engineering
- Xiangtan University
- Xiangtan 411105
- P. R. China
| |
Collapse
|
18
|
Qing Z, Hu J, Xu J, Zou Z, Lei Y, Qing T, Yang R. An intramolecular catalytic hairpin assembly on a DNA tetrahedron for mRNA imaging in living cells: improving reaction kinetics and signal stability. Chem Sci 2019; 11:1985-1990. [PMID: 34123293 PMCID: PMC8148388 DOI: 10.1039/c9sc04916a] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Enzyme-free amplification techniques based on dynamic DNA self-assembly (DDSA) have recently been developed for the in situ detection of mRNA in living cells. However, signal generation in traditional DDSA amplifiers is mainly dependent on the random diffusion of dissociative probes in a bulk solution, which is generally accompanied by poor kinetics and interference from complex biological systems. In this work, a new amplifier based on the design of an intramolecular catalytic hairpin assembly (intra-CHA) is proposed for the FRET imaging of mRNA in living cells. Compared with that in the free catalytic hairpin assembly (free-CHA), probes H1 and H2 in intra-CHA were simultaneously fixed on a DNA tetrahedron. The distance between them was closer, the local concentration of H1 and H2 in intra-CHA was theoretically approximately 808-times higher than that in free-CHA, and the initial reaction rate was enhanced 15.6 fold. Due to the spatial confinement effect, the reaction kinetics for target-catalyzed signal generation were significantly improved. By virtue of the three-dimensional nanostructure, H1 and H2 in the intra-CHA amplifier entered cells without any transfection or nanocarrier, and the probes and their products were free from biological interference, providing much higher signal stability for the reliable imaging of mRNA in living cells. An intramolecular catalytic hairpin assembly is implemented on a DNA tetrahedron for mRNA imaging in living cells. The spatial confinement effect enables the acceleration of target-triggered signal generation, with excellent cell permeability and FRET signal stability.![]()
Collapse
Affiliation(s)
- Zhihe Qing
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Jinlei Hu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Jingyuan Xu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Zhen Zou
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Yanli Lei
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| | - Taiping Qing
- College of Environment and Resources, Xiangtan University Xiangtan 411105 P. R. China
| | - Ronghua Yang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Hunan Provincial Engineering Research Center for Food Processing of Aquatic Biotic Resources, School of Chemistry and Food Engineering, Changsha University of Science and Technology Changsha 410114 P. R. China
| |
Collapse
|
19
|
Gong X, Li X, Qing T, Zhang P, Feng B. Amplified colorimetric detection of tetracycline based on an enzyme-linked aptamer assay with multivalent HRP-mimicking DNAzyme. Analyst 2019; 144:1948-1954. [PMID: 30694262 DOI: 10.1039/c8an02284d] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tetracycline (TC) is widely used to treat bacterial infections in humans and animals due to its low price and good antibacterial properties. The abuse of tetracycline has led to TC residues in daily food that could seriously affect human health. Thus, it is imperative to develop highly sensitive and selective methods for TC detection. In this work, we developed a colorimetric method for TC detection based on an enzyme-linked aptamer assay (ELAA) with multivalent HRP-mimicking DNAzyme. An aptamer was used as an alternative recognition element in the enzyme-linked immunosorbent assay (ELISA). Multivalent HRP-mimicking DNAzyme, assembled via hybridization chain reactions (HCR), was used for catalytic substrate color rendering in ELAA. The multivalent HRP-mimicking DNAzyme exhibited enhanced catalytic capacity and improved the detection sensitivity greatly. The limit of detection was 8.1 × 10-2 ng mL-1 with a linear range from 1.0 × 10-2 ng mL-1 to 1.0 × 104 ng mL-1 toward TC in buffer. To challenge the practical application capability of this strategy, the detection of TC in milk samples was also investigated and showed similar linear relationships. Due to the introduction of an aptamer, this ELAA strategy shows high selectivity towards TC and has potential for the detection of a wide spectrum of analytes.
Collapse
Affiliation(s)
- Xin Gong
- College of Chemical Engineering, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | | | | | | | | |
Collapse
|
20
|
Qing T, Long C, Wang X, Zhang K, Zhang P, Feng B. Detection of micrococcal nuclease for identifying Staphylococcus aureus based on DNA templated fluorescent copper nanoclusters. Mikrochim Acta 2019; 186:248. [DOI: 10.1007/s00604-019-3363-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 03/09/2019] [Indexed: 02/07/2023]
|
21
|
Qing T, Marczyk M, Wali V, Gunasekharan V, Patwardhan G, Pusztai L, Hatzis C. Abstract P4-03-01: Pathway level complementarity of germline and somatic events in breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-03-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Progression from a normal cell state to cancer requires multiple genomic hits in key regulatory pathways. In the case of hereditary cancer syndromes, some of these hits occur in the germline, but additional somatic mutations are required for malignant transformation. We hypothesize that this paradigm could be extended to sporadic cancers as well. What somatic mutation function as a cancer driver event may be determined by the constellation of germline variants a person is born with. We propose that even rare, non-recurrent, high functional impact germline variants in genes involved in cancer-related pathways could influence the biological impact of somatic mutations in other cancer-related genes. The goal of the current analysis was to examine associations between pathway alterations caused by high functional impact germline variants or somatic mutations in the “hallmarks of cancer” pathways in breast cancer.
Methods: We obtained germline DNA sequencing and copy number variation (CNV) data from the breast cancer TCGA cohort. After population clustering with the HapMap cohort, we selected a homogeneous group of 796 patients of Western European ancestry and downloaded the matching somatic mutations (SNVs and INDELs) that were available for 750 cases, that comprise the current study population. Germline CNVs were classified as recurrent or rare losses or gains. Potentially pathogenic germline variants (SNPs) were obtained from the PanCancer Altas project. All germline or somatic mutations were mapped at the gene level to the 50 Cancer Hallmarks pathway collection. We designated a pathway mutated if at least 1 gene had a germline or a somatic mutation. Complementarity between pathway alterations by germline and somatic events were evaluated using the Fisher exact test adjusted for multiple comparisons.
Results: At the germline level, 2,057 genes were affected by CNVs (mean 30, range 3-151 genes/patient), and a total of 43 genes carried germline pathogenic SNPs that affected 13.8% of the patients. At the somatic level, we detected 40,881 high functional impact mutations (mean 54.3, range 1-3889 mutations/patient) in 13,080 genes (mean 50.8, range 1-3166 genes/patient). The 50 Cancer Hallmark pathways contained 4386 genes (mean 146.5, range 32-200 genes/pathway), and were mutated in the majority of the patients (85% germline, 93% somatic). Several pathways, such as HEME_METABOLISM, INTERFERON_ALPHA_RESPONSE, and KRAS_SIGNALING, were frequently affected by germline alterations, while the somatic mutations were most frequently involved in the COMPLEMENT, E2F_TARGET, and UV_RESPONSE_UP. Interaction analysis revealed co-occurrence between MYC_TARGETS_V1 (germline) and UV_RESPONSE_DN (somatic) or MTORC1_SINGALING (somatic) (p<0.01), and TNFA_SIGNALING_VIA_NFKB (germline) and IL6_JAK_STAT3_SIGNALING (germline) with E2F_TARGETS (somatic) (p<0.01). We also observed an exclusive relationship between germline alterations in BILE_ACID_METABOLISM and somatic mutations in COMPLEMENT pathway (p<0.01).
Conclusions: Our results highlight the importance of pathway-level analysis of germline alterations in breast cancer, which might help to understand the interrelationship between germline and somatic alterations in breast cancer.
Citation Format: Qing T, Marczyk M, Wali V, Gunasekharan V, Patwardhan G, Pusztai L, Hatzis C. Pathway level complementarity of germline and somatic events in breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-03-01.
Collapse
Affiliation(s)
- T Qing
- Yale University, New Haven, CT
| | | | - V Wali
- Yale University, New Haven, CT
| | | | | | | | | |
Collapse
|
22
|
Marczyk M, Gunasekharan V, Wali VB, Shi W, Patwardhan G, Qing T, Pusztai L, Hatzis C. Abstract P2-06-06: Targeting loss of isoenzyme diversity as a novel therapeutic strategy in breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p2-06-06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Several metabolic steps are mediated by distinct proteins or isoenzymes that catalyze the same reaction, providing redundancy of metabolic functions. Metabolic states are frequently altered in cancer to support survival and proliferation in hypoxic and otherwise hostile microenvironments, and metabolic re-wiring often involve loss of isoenzyme diversity. We hypothesize that targeting enzymes that have lost isoenzyme diversity in cancer, but not in normal cells, provides an opportunity to selectively target cancers. In this study, we assessed mRNA expression of all known human isoenzyme families in breast cancer and normal breast tissue and identified isoenzymes with loss of diversity within each breast cancer subtype.
Methods: We obtained RNAseq data from cancer and patient-matched normal breast tissues from the TCGA (N=66 HR+, N=24 HER2+, and N=15 TNBC tumors). We retrieved annotated human isoenzyme families from the ENZYME nomenclature database. We compared expression in cancer and matched normal samples from the same patient to identify isoenzymes that had i) same or increased expression of the target isoenzyme in cancer vs normal and ii) reduced expression of the complementary isoenzymes in cancer. We developed five scores that capture various elements of these characteristics and prioritized candidates as targets based on clustering and their combined ranking based on the five scores. We validated overexpression of the candidate isoenzymes relative to other isoforms in breast cancer microarray data from ArrayExpress (E-GEOD-76250: 33 TNBC, and E-GEOD-70951: 30 TNBC, 108 HR+, 10 HER2+).
Results: We identified 321 enzymes in the TCGA discovery cohort that correspond to 829 unique isoenzymes. Overall, 636, 483 and 429 isoenzymes were differentially expressed in HR+, HER2+ and TNBC cancers, respectively, compared to corresponding normal samples. Of these, 308 isoenzymes were differentially expressed relative to normal in all 3 subtypes. In all, 112 and 92, and 84 were selected as candidate isoenzyme therapeutic targets in HR+, HER2+ and TNBC, respectively. 23 isoenzymes prioritized in clustering step were further validated. Finally, 6 isoenzymes were validated in HR+ (ALDOA, GUSB, GYG1, MIF, P3H1, PCK2), 10 in HER2+ (ALDH1L2, ALDOA, GLYATL2, GUSB, GYG1, GYS1, MIF, P3H1, PCK2, PTGS1) and 12 in TNBC (ADSS, ALAS1, ALDH1L2, ALDOA, ART3, GLYATL2, GUSB, GYS1, HS3ST1, MIF, PCK2, SOAT1), as potential targets for breast cancer treatment. Of these, 5 potential isoenzyme targets (ALDH1L2, GUSB, GLYATL2, MIF, PCK2), which were mostly hydrolases and transferases, were further selected for ongoing experimental validation in the laboratory. Decreased expression of the complementary isoforms of these 5 targets were primarily due to DNA methylation of the genes in cancer.
Conclusions: We found that loss of isoenzyme diversity is a broad phenomenon in breast cancers that may be explored therapeutically. We identified several instances of “isoenzyme addiction” in which cancers depend exclusively on a single isoenzyme while downregulating via methylation the complementary isoenzymes, providing cancer-specific targeting opportunities. We are currently validating several of these targets in cell line models.
Citation Format: Marczyk M, Gunasekharan V, Wali VB, Shi W, Patwardhan G, Qing T, Pusztai L, Hatzis C. Targeting loss of isoenzyme diversity as a novel therapeutic strategy in breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P2-06-06.
Collapse
Affiliation(s)
- M Marczyk
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - V Gunasekharan
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - VB Wali
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - W Shi
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - G Patwardhan
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - T Qing
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - L Pusztai
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| | - C Hatzis
- Yale School of Medicine, New Haven; OrigiMed, Shanghai, China; Silesian University of Technology, Gliwice, Poland
| |
Collapse
|
23
|
Wei Z, Qing T, Wei D. Clinical feasibility of pancreaticoduodenectomy in different ages. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy441.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
24
|
Ma W, Yan L, He X, Qing T, Lei Y, Qiao Z, He D, Huang K, Wang K. Hairpin-Contained i-Motif Based Fluorescent Ratiometric Probe for High-Resolution and Sensitive Response of Small pH Variations. Anal Chem 2018; 90:1889-1896. [DOI: 10.1021/acs.analchem.7b03972] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wenjie Ma
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Lv’an Yan
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Taiping Qing
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Yanli Lei
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Zhenzhen Qiao
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Kaihang Huang
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing
and Chemometrics, College of Biology, College of Chemistry and Chemical
Engineering, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Changsha 410082, China
| |
Collapse
|
25
|
Qing T, Sun H, He X, Huang X, He D, Bu H, Qiao Z, Wang K. An ion quencher operated lamp for multiplexed fluorescent bioassays. Anal Bioanal Chem 2017; 410:1427-1434. [PMID: 29279984 DOI: 10.1007/s00216-017-0782-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 11/13/2017] [Accepted: 11/22/2017] [Indexed: 12/24/2022]
Abstract
A novel and adjustable lamp based on competitive interaction among dsDNA-SYBR Green I (SGI), ion quencher, and analyte was designed for bioanalysis. The "filament" and switch of the lamp could be customized by employing different dsDNA and ion quencher. The poly(AT/TA) dsDNA was successfully screened as the most effective filament of the lamp. Two common ions, Hg2+ and Fe3+, were selected as the model switch, and the corresponding ligand molecules cysteine (Cys) and pyrophosphate ions (PPi) were selected as the targets. When the fluorescence-quenched dsDNA/SGI-ion complex was introduced into a target-containing system, ions could be bound by competitive molecules and separate from the complex, thereby lighting the lamp. However, no light was observed if the biomolecule could not snatch the metal ions from the complex. Under the optimal conditions, sensitive and selective detection of Cys and PPi was achieved by the lamp, with practical applications in fetal bovine serum and human urine. This ion quencher regulated lamp for fluorescent bioassays is simple in design, fast in operation, and is more convenient than other methods. Significantly, as many molecules could form stable complexes with metal ions selectively, this ion quencher operated lamp has potential for the detection of a wide spectrum of analytes. Graphical abstract A novel and adjustable lamp on the basis of competitive interaction among dsDNA-SYBR Green I, ions quencher and analyte was designed for bioanalysis. The filament and switch of lamp could be customized by employing different dsDNA and ions quencher.
Collapse
Affiliation(s)
- Taiping Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China
| | - Huanhuan Sun
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China.
| | - Xiaoqin Huang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China
| | - Hongchang Bu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China
| | - Zhenzhen Qiao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecule Engineering of Hunan Province, Hunan University, Changsha, Hunan, 410082, China.
| |
Collapse
|
26
|
Shangguan J, Huang J, He D, He X, Wang K, Ye R, Yang X, Qing T, Tang J. Highly Fe3+-Selective Fluorescent Nanoprobe Based on Ultrabright N/P Codoped Carbon Dots and Its Application in Biological Samples. Anal Chem 2017. [DOI: 10.1021/acs.analchem.7b01053] [Citation(s) in RCA: 215] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jingfang Shangguan
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Jin Huang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Dinggeng He
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Xiaoxiao He
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Kemin Wang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Runzhi Ye
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Xue Yang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Taiping Qing
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| | - Jinlu Tang
- State Key Laboratory
of Chemo/Biosensing and Chemometrics, College of Biology, College
of Chemistry and Chemical Engineering, and Key Laboratory for Bio-Nanotechnology
and Molecule Engineering of Hunan Province, Hunan University, Changsha 410082, China
| |
Collapse
|
27
|
Luo L, Xu F, Shi H, He X, Qing T, Lei Y, Tang J, He D, Wang K. Label-free and sensitive assay for deoxyribonuclease I activity based on enzymatically-polymerized superlong poly(thymine)-hosted fluorescent copper nanoparticles. Talanta 2017; 169:57-63. [PMID: 28411822 DOI: 10.1016/j.talanta.2017.03.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/02/2017] [Accepted: 03/16/2017] [Indexed: 02/01/2023]
Abstract
Deoxyribonuclease I (DNase I) is an important physiological indicator and diagnostic biomarker, but traditional methods for assessing its activity are time-consuming, laborious, and usually radioactive. Herein, by effectively combining the special functions of DNase I and terminal deoxynucleotidyl transferase (TdT), a simple, green, cost-effective, label-free and ultrasensitive assay for DNase I activity has been constructed based on superlong poly(thymine)-hosted copper nanoparticles (poly T-CuNPs). In this strategy, a 3'-phosphorylated DNA primer is designed to block TdT polymerization. After addition of DNase I, the primer could be digested to release 3'-hydroxylated fragments, which could further be tailed by TdT in dTTP pool with superlong poly T ssDNA for CuNPs formation. Fluorescence measurements and gel electrophoresis demonstrated its feasibility for DNase I analysis. The results indicated that with a size of 3-4nm, the CuNPs templated by TdT-polymerized superlong poly T (>500 mer) had several advantages such as short synthetic time (<5min), large Stokes shift (~275nm) and intense red fluorescence emission. Under the optimal conditions, quantitative detection of DNase I was realized, showing a good linear correlation between 0.02 and 2.0U/mL (R2=0.9928) and a detection limit of 0.02U/mL. By selecting six other nucleases or proteins as controls, an excellent specificity was also verified. Then, the strategy was successfully applied to detect DNase I in diluted serum with a standard addition method, thus implying its reliability and practicability for biological samples. The proposed strategy might be promising as a sensing platform for related molecular biology and disease studies.
Collapse
Affiliation(s)
- Lan Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Fengzhou Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Hui Shi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China.
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Taiping Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Yanli Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Jinlu Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Hunan University, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China.
| |
Collapse
|
28
|
Qing T, He X, He D, Qing Z, Wang K, Lei Y, Liu T, Tang P, Li Y. Oligonucleotide-templated rapid formation of fluorescent gold nanoclusters and its application for Hg2+ ions sensing. Talanta 2016; 161:170-176. [DOI: 10.1016/j.talanta.2016.08.045] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 08/02/2016] [Accepted: 08/16/2016] [Indexed: 10/21/2022]
|
29
|
Liu Q, Liu J, He D, Qing T, He X, Wang K, Mao Y. Triple-helix molecular switch-induced hybridization chain reaction amplification for developing a universal and sensitive electrochemical aptasensor. RSC Adv 2016. [DOI: 10.1039/c6ra19526a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In this work, a universal and sensitive “signal-on” electrochemical aptasensor platform has been developed based on a triple-helix molecular switch (THMS)-induced hybridization chain reaction (HCR) amplification.
Collapse
Affiliation(s)
- Qiaoqiao Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Jinquan Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Taiping Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Yinfei Mao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| |
Collapse
|
30
|
Mao Z, Qing Z, Qing T, Xu F, Wen L, He X, He D, Shi H, Wang K. Poly(thymine)-Templated Copper Nanoparticles as a Fluorescent Indicator for Hydrogen Peroxide and Oxidase-Based Biosensing. Anal Chem 2015; 87:7454-60. [PMID: 26112746 DOI: 10.1021/acs.analchem.5b01700] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Biomineralized fluorescent metal nanoparticles have attracted considerable interest in many fields by virtue of their excellent properties in synthesis and application. Poly(thymine)-templated fluorescent copper nanoparticles (T-CuNPs) as a promising nanomaterial has been exploited by us recently and displays great potential for signal transducing in biochemical analysis. However, the application of T-CuNPs is rare and still at an early stage. Here, a new fluorescent analytical strategy has been developed for H2O2 and oxidase-based biosensing by exploiting T-CuNPs as an effective signal indicator. The mechanism is mainly based on the poly(thymine) length-dependent formation of T-CuNPs and the probe's oxidative cleavage. In this assay, the probe T40 can effectively template the formation of T-CuNPs by a fast in situ manner in the absence of H2O2, with high fluorescent signal, while the probe is cleaved into short-oligonucleotide fragments by hydroxyl radical (·OH) which is formed from the Fenton reaction in the presence of H2O2, leading to the decline of fluorescence intensity. By taking advantage of H2O2 as a mediator, this strategy is further exploited for oxidase-based biosensing. As the proof-of-concept, glucose in human serum has been chosen as the model system and has been detected, and its practical applicability has been investigated by assay of real clinical blood samples. Results demonstrate that the proposed strategy has not only good detection capability but also eminent detection performance, such as simplicity and low-cost, holding great potential for constructing effective sensors for biochemical and clinical applications.
Collapse
Affiliation(s)
- Zhengui Mao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Zhihe Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Taiping Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Fengzhou Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Li Wen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Hui Shi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University, Changsha, Hunan 410082, P. R. China
| |
Collapse
|
31
|
Tan W, Zhang J, Liu Y, Yang G, Qing T, Lin J, Wei H. Treatment of tubal pregnancy using comprehensive interventional methods. CLIN EXP OBSTET GYN 2014. [DOI: 10.12891/ceog17932014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
|
32
|
Qing Z, Mao Z, Qing T, He X, Zou Z, He D, Shi H, Huang J, Liu J, Wang K. Visual and portable strategy for copper(II) detection based on a striplike poly(thymine)-caged and microwell-printed hydrogel. Anal Chem 2014; 86:11263-8. [PMID: 25325821 DOI: 10.1021/ac502843t] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Due to its importance to develop strategies for copper(II) (Cu(2+)) detection, we here report a visual and portable strategy for Cu(2+) detection based on designing and using a strip-like hydrogel. The hydrogel is functionalized through caging poly(thymine) as probes, which can effectively template the formation of fluorescent copper nanoparticles (CuNPs) in the presence of the reductant (ascorbate) and Cu(2+). On the hydrogel's surface, uniform wells of microliter volume (microwells) are printed for sample-injection. When the injected sample is stained by Cu(2+), fluorescent CuNPs will be in situ templated by poly T in the hydrogel. With ultraviolet (UV) irradiation, the red fluorescence of CuNPs can be observed by naked-eye and recorded by a common camera without complicated instruments. Thus, the strategy integrates sample-injection, reaction and indication with fast signal response, providing an add-and-read manner for visual and portable detection of Cu(2+), as well as a strip-like strategy. Detection ability with a detectable minimum concentration of 20 μM and practically applicable properties have been demonstrated, such as resistance to environmental interference and good constancy, indicating that the strategy holds great potential and significance for popular detection of Cu(2+), especially in remote regions. We believe that the strip-like hydrogel-based methodology is also applicable to other targets by virtue of altering probes.
Collapse
Affiliation(s)
- Zhihe Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University , Changsha 410082, P. R. China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Qing Z, Qing T, Mao Z, He X, Wang K, Zou Z, Shi H, He D. dsDNA-specific fluorescent copper nanoparticles as a “green” nano-dye for polymerization-mediated biochemical analysis. Chem Commun (Camb) 2014; 50:12746-8. [DOI: 10.1039/c4cc05101g] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
34
|
Qing Z, He X, Huang J, Wang K, Zou Z, Qing T, Mao Z, Shi H, He D. Target-Catalyzed Dynamic Assembly-Based Pyrene Excimer Switching for Enzyme-Free Nucleic Acid Amplified Detection. Anal Chem 2014; 86:4934-9. [DOI: 10.1021/ac500834g] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Zhihe Qing
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Xiaoxiao He
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Jin Huang
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Kemin Wang
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Zhen Zou
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Taiping Qing
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Zhengui Mao
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Hui Shi
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| | - Dinggeng He
- State Key
Laboratory of Chemo/Biosensing
and Chemometrics, College of Chemistry and Chemical Engineering, College
of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering
of Hunan Province, Hunan University, Changsha 410082, People’s Republic of China
| |
Collapse
|
35
|
Zou Z, Qing Z, He X, Wang K, He D, Shi H, Yang X, Qing T, Yang X. Ligation-rolling circle amplification combined with γ-cyclodextrin mediated stemless molecular beacon for sensitive and specific genotyping of single-nucleotide polymorphism. Talanta 2014; 125:306-12. [PMID: 24840448 DOI: 10.1016/j.talanta.2014.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 02/26/2014] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
Abstract
A novel approach for highly sensitive and selective genotyping of single-nucleotide polymorphism (SNP) has been developed based on ligation-rolling circle amplification (L-RCA) and stemless molecular beacon. In this approach, two tailored DNA probes were involved. The stemless molecular beacon, formed through the inclusion interactions of γ-cyclodextrin (γ-CD) and bis-pyrene labeled DNA fragment, was served as signal probe. In the absence of mutant target, the two pyrene molecules were bound in the γ-CD cavity to form an excimer and showed a strong fluorescence at 475 nm. It was here named γ-CD-P-MB. The padlock DNA probe was designed as recognition probe. Upon the recognition of a point mutation DNA targets, the padlock probe was ligated to generate a circular template. An RCA amplification was then initiated using the circular template in the presence of Phi29 polymerase and dNTPs. The L-RCA products, containing repetitive sequence units, subsequently hybridized with the γ-CD-P-MB. This made pyrene molecules away from γ-CD cavity and caused a decrease of excimer fluorescence. As a proof-of-concept, SNP typing of β-thalassemia gene at position -28 was investigated using this approach. The detection limit of mutated target was determined to be 40 fM. In addition, DNA ligase offered high fidelity in distinguishing the mismatched bases at the ligation site, resulting in positive detection of mutant target even when the ratio of the wildtype to the mutant is 999:1. Given these attractive characteristics, the developed approach might provide a great genotyping platform for pathogenic diagnosis and genetic analysis.
Collapse
Affiliation(s)
- Zhen Zou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Zhihe Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China.
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China.
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Hui Shi
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Xue Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Taiping Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| | - Xiaoxiao Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Changsha 410082, PR China; College of Biology, Hunan University, Changsha 410082, PR China; Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Changsha 410082, PR China
| |
Collapse
|
36
|
Qing T, Qing Z, Mao Z, He X, Xu F, Wen L, He D, Shi H, Wang K. dsDNA-templated fluorescent copper nanoparticles: poly(AT-TA)-dependent formation. RSC Adv 2014. [DOI: 10.1039/c4ra11551a] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Poly(AT-TA) DNA is found to be the specific dsDNA sequence which can act as a highly-efficient template for the formation of dsDNA-templated copper nano-fluorophores.
Collapse
Affiliation(s)
- Taiping Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Zhihe Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Zhengui Mao
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Xiaoxiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Fengzhou Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Li Wen
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Dinggeng He
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Hui Shi
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| | - Kemin Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Biology
- College of Chemistry and Chemical Engineering
- Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province
- Hunan University
| |
Collapse
|
37
|
Tan W, Zhang J, Liu Y, Yang G, Qing T, Lin J, Wei H. Treatment of tubal pregnancy using comprehensive interventional methods. CLIN EXP OBSTET GYN 2014; 41:641-646. [PMID: 25551955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To investigate the efficacy of combined interventional methods in treatment of tubal pregnancy. MATERIALS AND METHODS One hundred sixty-two patients with tubal pregnancy were enrolled in this study. In all patients, the feeding uterine artery at affected side was perfused with methotrexate (MTX), followed by occlusion using gelatin sponge. Nineteen patients were also treated by perfusion of MTX in ovarian artery at affected side which partially participated in blood supply. Seven patients received direct puncture perfusion of MTX under B ultrasound guidance. Four cases received perfusion of MTX through fallopian tube. After surgery, the serum beta-human chorionic gonadotropin (β-HCG) level was regularly detected, and B ultrasound was used to monitor the pelvic mass change. For 33 patients with fertility requirement, hysterosalpingography (HSG) was conducted after menstruation restoration. RESULTS Tubal pregnancy was terminated in 160 patients (98.76%), with inefficacy in two patients (1.23%) who were treated by surgery. HSG showed tubal patency in 27 patients. Tubal obstruction was found in the other six patients. After recanalization, three cases were unobstructed, with obstruction in other three cases. Fifteen patients achieved intrauterine pregnancy after six to 17 months from surgery. CONCLUSIONS Comprehensive interventional treatment can prevent internal bleeding caused by failure of many conservative treatments, improve the indication and success rate of treatment, and preserve the complete fallopian tube.
Collapse
Affiliation(s)
- W Tan
- Department of Radiology, Tianyou Hospital Affiliated to Wuhan University of Science and Technology, China.
| | | | | | | | | | | | | |
Collapse
|
38
|
Qing Z, He X, Qing T, Wang K, Shi H, He D, Zou Z, Yan L, Xu F, Ye X, Mao Z. Poly(thymine)-templated fluorescent copper nanoparticles for ultrasensitive label-free nuclease assay and its inhibitors screening. Anal Chem 2013; 85:12138-43. [PMID: 24236868 DOI: 10.1021/ac403354c] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Noble-metal fluorescent nanoparticles have attracted considerable interest on account of their excellent properties and potential applicable importance in many fields. Particularly, we recently found that poly(thymine) (poly T) could template the formation of fluorescent copper nanoparticles (CuNPs), offering admirable potential as novel functional biochemical probes. However, exploration of poly T-templated CuNPs for application is still at a very early stage. We report herein for the first example to develop a novel ultrasensitive label-free method for the nuclease (S1 nuclease as a model system) assay, and its inhibitors screening using the poly T-templated fluorescent CuNPs. In this assay, the signal reporter of poly T of 30 mer (T30) kept the original long state in the absence of nuclease, which could effectively template the formation of fluorescent CuNPs. In the presence of nuclease, poly T was digested to mono- or oligonucleotide fragments with decrease of fluorescence. The proposed method was low-cost and simple in its operation without requirement for complex labeling of probe DNA or sophisticated synthesis of the fluorescent compound. The assay process was very rapid with only 5 min for the formation of fluorescent CuNPs. The capabilities for target detection from complex fluids and screening of nuclease inhibitors were verified. A high sensitivity exhibited with a detectable minimum concentration of 5 × 10(-7) units μL(-1) S1 nuclease, which was about 1-4 orders of magnitude more sensitive than the developed approaches.
Collapse
Affiliation(s)
- Zhihe Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, College of Biology, Key Laboratory for Bio-Nanotechnology and Molecular Engineering of Hunan Province, Hunan University , Changsha 410082, P. R. China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Qing Z, He X, He D, Wang K, Xu F, Qing T, Yang X. Poly(thymine)-Templated Selective Formation of Fluorescent Copper Nanoparticles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304631] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
40
|
Qing Z, He X, He D, Wang K, Xu F, Qing T, Yang X. Poly(thymine)-templated selective formation of fluorescent copper nanoparticles. Angew Chem Int Ed Engl 2013; 52:9719-22. [PMID: 23881724 DOI: 10.1002/anie.201304631] [Citation(s) in RCA: 211] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Zhihe Qing
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan University, Changsha 410082, China
| | | | | | | | | | | | | |
Collapse
|
41
|
Zhengqi F, Qing T, Jianzhi W. P3.157 Endoplasmic reticulum stress induced hyperphosphorylation of tau by activating GSK-3β. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70721-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
42
|
Qing T, Liu H, Wei W, Ye X, Shen W, Zhang D, Song Z, Yang W, Ding M, Deng H. Mature oocytes derived from purified mouse fetal germ cells. Hum Reprod 2007; 23:54-61. [DOI: 10.1093/humrep/dem334] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|