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Wu D, Cao Y, Yin T, Huang Q. Inhibitive effect of trehalose and sodium pyrophosphate on oxidation and structural changes of myofibrillar proteins in silver carp surimi during frozen storage. Food Res Int 2024; 187:114361. [PMID: 38763645 DOI: 10.1016/j.foodres.2024.114361] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 04/02/2024] [Accepted: 04/17/2024] [Indexed: 05/21/2024]
Abstract
This work investigated the cryoprotective effect of trehalose (TH) and sodium pyrophosphate (SPP) alone and in combination on myofibrillar protein (MP) oxidation and structural changes in silver carp surimi during 90 days of frozen storage (-20 °C). TH combined with SPP was significantly more effective than single TH or SPP in preventing MP oxidation (P < 0.05), showing a higher SH content (6.05 nmol/mg protein), and a lower carbonyl (4.24 nmol/mg protein) and dityrosine content (1280 A.U.). SDS-PAGE results indicated that TH combined with SPP did not differ significantly from TH and SPP in inhibiting protein degradation but was more effective in inhibiting protein crosslinking. Moreover, all cryoprotectants could stabilise the secondary and tertiary structures and inhibit unfolded and aggregation of MP, with the combination of TH and SPP being the best. It's worth noting that TH combined with SPP had a synergistic effect on inhibiting the decrease in α-helix content and gel-forming ability, and the increase in surface hydrophobicity. Overall, TH combined with SPP could significantly inhibited MP oxidation and structural changes in surimi during frozen storage and improve the gel-forming ability, which was significantly better than single TH or SPP.
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Affiliation(s)
- Dan Wu
- College of Food Science and Technology, and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; National R&D Branch Center for Conventional Freshwater Fish Processing, Wuhan 430070, China
| | - Yuan Cao
- College of Food Science and Technology, and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; National R&D Branch Center for Conventional Freshwater Fish Processing, Wuhan 430070, China
| | - Tao Yin
- College of Food Science and Technology, and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; National R&D Branch Center for Conventional Freshwater Fish Processing, Wuhan 430070, China
| | - Qilin Huang
- College of Food Science and Technology, and MOE Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan 430070, China; National R&D Branch Center for Conventional Freshwater Fish Processing, Wuhan 430070, China.
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2
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Lim RC, Gary RK. Kinetic analysis of T4 polynucleotide kinase via isothermal titration calorimetry. Arch Biochem Biophys 2024; 756:109995. [PMID: 38621448 DOI: 10.1016/j.abb.2024.109995] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/19/2024] [Accepted: 04/12/2024] [Indexed: 04/17/2024]
Abstract
T4 polynucleotide kinase (T4 PNK) phosphorylates the 5'-terminus of DNA and RNA substrates. It is widely used in molecular biology. Single nucleotides can serve as substrates if a 3'-phosphate group is present. In this study, the T4 PNK-catalyzed conversion of adenosine 3'-monophosphate (3'-AMP) to adenosine-3',5'-bisphosphate was characterized using isothermal titration calorimetry (ITC). Although ITC is typically used to study ligand binding, in this case the instrument was used to evaluate enzyme kinetics by monitoring the heat production due to reaction enthalpy. The reaction was initiated with a single injection of 3'-AMP substrate into the sample cell containing T4 PNK and ATP at pH 7.6 and 30 °C, and Michaelis-Menten analysis was performed on the reaction rates derived from the plot of differential power versus time. The Michaelis-Menten constant, KM, was 13 μM, and the turnover number, kcat, was 8 s-1. The effect of inhibitors was investigated using pyrophosphate (PPi). PPi caused a dose-dependent decrease in the apparent kcat and increase in the apparent KM under the conditions tested. Additionally, the intrinsic reaction enthalpy and the activation energy of the T4 PNK-catalyzed phosphorylation of 3'-AMP were determined to be -25 kJ/mol and 43 kJ/mol, respectively. ITC is seldom used as a tool to study enzyme kinetics, particularly for technically-challenging enzymes such as kinases. This study demonstrates that quantitative analysis of kinase activity can be amenable to the ITC single injection approach.
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Affiliation(s)
- Rebecca C Lim
- Department of Chemistry & Biochemistry, University of Nevada, Las Vegas, USA
| | - Ronald K Gary
- Department of Chemistry & Biochemistry, University of Nevada, Las Vegas, USA.
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3
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Hu Y, Zhou C, Zeng X, Xia Q, Sun Y, Pan D. Phosphate type dependent phosphorylation on the interfacial and emulsion stabilizing behaviors of goose liver protein: Perspective of protein charging. Colloids Surf B Biointerfaces 2024; 238:113872. [PMID: 38555762 DOI: 10.1016/j.colsurfb.2024.113872] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/28/2024] [Accepted: 03/21/2024] [Indexed: 04/02/2024]
Abstract
Elucidation on the emulsifying behaviors of goose liver protein (GLP) from interfacial perspective was scarce when protein charging was altered. This work aimed to elucidate the role of phosphorylation on the interfacial associative interaction and then emulsion stabilizing properties of GLP using three structurally relevant phosphates of sodium trimetaphosphate (STMP), sodium tripolyphosphate (STPP) and sodium pyrophosphate (TSPP). A monotonic increment of protein charging treated from STMP, STPP to TSPP caused progressively increased particle de-aggregation, surface hydrophobicity and structural flexibility of GLP. Compared with STMP and TSPP, STPP phosphorylation rendered the most strengthened interfacial equilibrium pressure (11.98 ± 0.24 mN/m) due to sufficient unfolding but moderated charging character conveyed. Desorption curve and interfacial protein microstructure indicated that STPP phosphorylation caused the highest interfacial connectivity between proteins adsorbed onto the same droplet, as was also verified by interfacial elastic modulus (10.3 ± 0.21 mN/m). STPP treated GLP also yielded lowest droplet size (8.16 ± 0.10 μm), flocculation (8.18%) and Turbiscan stability index (8.78 ± 0.36) of emulsion but most improved microrheological properties. Overall, phosphorylation functioned itself in fortifying the intradroplet protein-protein interaction but restraining the interdroplet aggregation, and STPP phosphorylation endowed the protein with most enhanced interfacial stabilization and emulsifying efficiency.
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Affiliation(s)
- Yangyang Hu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products; Ningbo University, Ningbo, Zhejiang 315211, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science & Engineering, Ningbo University, Ningbo 315211, China
| | - Changyu Zhou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products; Ningbo University, Ningbo, Zhejiang 315211, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science & Engineering, Ningbo University, Ningbo 315211, China
| | - Xiaoqun Zeng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products; Ningbo University, Ningbo, Zhejiang 315211, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science & Engineering, Ningbo University, Ningbo 315211, China
| | - Qiang Xia
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products; Ningbo University, Ningbo, Zhejiang 315211, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science & Engineering, Ningbo University, Ningbo 315211, China
| | - Yangying Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products; Ningbo University, Ningbo, Zhejiang 315211, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science & Engineering, Ningbo University, Ningbo 315211, China.
| | - Daodong Pan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products; Ningbo University, Ningbo, Zhejiang 315211, China; Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, College of Food Science & Engineering, Ningbo University, Ningbo 315211, China.
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Sharma D, Wangoo N, Sharma RK. Ultrasensitive NIR fluorometric assay for inorganic pyrophosphatase detection via Cu 2+-PPi interaction using bimetallic Au-Ag nanoclusters. Anal Chim Acta 2024; 1305:342584. [PMID: 38677840 DOI: 10.1016/j.aca.2024.342584] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/30/2024] [Accepted: 04/04/2024] [Indexed: 04/29/2024]
Abstract
BACKGROUND Inorganic pyrophosphatase (PPase) is key enzyme playing a key role in biochemical transformations such as biosynthesis of DNA and RNA, bone formation, metabolic pathways associated with lipid, carbohydrate and phosphorous. It has been reported that lung adenocarcinomas, colorectal cancer, and hyperthyroidism disorders can result from abnormal level of PPase. Therefore, it is of notable significance to develop simple and effective real time assay for PPase enzyme activity monitoring for screening of many metabolic pathways as well as for early disease diagnosis. RESULT The fluorometric detection of PPase enzyme in near infrared region-1 (NIR-1) has been carried out using bimetallic nanoclusters (LA@AuAg NCs). The developed sensing strategy was based on quenching of fluorescence intensity of LA@AuAg NCs upon interaction with copper (Cu2+) ions. The off state of LA@AuAg_Cu2+ ensemble was turned on upon addition of pyrophosphate anion (PPi) due to strong binding interaction between PPi and Cu2+. The catalytic conversion of PPi into phosphate anion (Pi) in the presence of PPase led to liberation of Cu2+ ions, and again quenched off state was retrieved due to interaction of free Cu2+ with LA@AuAg NCs. The ultrasensitive detection of PPase was observed in the linear range of 0.06-250 mU/mL with LOD as 0.0025 mU/mL. The designed scheme showed good selectivity towards PPase enzyme in comparison to other bio-substrates, along with good percentage recovery for PPase detection in real human serum samples. SIGNIFICANCE The developed NIR based assay is ultrasensitive, highly selective and robust for PPase enzyme and can be safely employed for other enzymes detection. This highly sensitive nature of biosensor was result of involvement of fluorescence-based technique and synergistic effect of dual metal in NIR based bimetallic NCs. Moreover, owing to the emission in NIR domain, in future, these nanoclusters can be safely employed for many biomedical applications for In vivo studies.
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Affiliation(s)
- Deepika Sharma
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Sector 14, Chandigarh, 160014, India
| | - Nishima Wangoo
- Department of Applied Sciences, University Institute of Engineering and Technology (U.I.E.T.), Panjab University, Sector-25, Chandigarh, 160014, India
| | - Rohit K Sharma
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Sector 14, Chandigarh, 160014, India.
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Shi M, Kang M, Liu P, Zhou H, Pei M, Zhang G, Yang X. Thienopyrimidine-derived multifunctional fluorescence sensor for the detection of Cu 2+, Fe 3+, and PPi in different solvents. LUMINESCENCE 2024; 39:e4744. [PMID: 38682162 DOI: 10.1002/bio.4744] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/08/2024] [Accepted: 03/23/2024] [Indexed: 05/01/2024]
Abstract
Hydrazine substituted thienopyrimidine, a new fluorophore, was used to synthesize a novel Schiff base R1 as a chemosensor via the condensation with p-formyltriphenylamine, and the structure was confirmed using nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS) analysis. When treated with Cu2+ in dimethylsulfoxide (DMSO)/H2O buffer, R1 showed a phenomenon of fluorescence quenching, which was reversible with the action of ethylenediaminetetraacetic acid (EDTA). When treated with Fe3+ in dimethylformamide (DMF)/H2O buffer, R1 exhibited the same phenomenon, but fluorescence was recovered with inorganic pyrophosphate (PPi) quantitatively. The complexation ratios for R1-Cu2+ and R1-Fe3+ were both 1:2, which were manifested by MS titrations and corresponding Job's plots. The limits of detection of R1 for Cu2+ and Fe3+ were 3.11 × 10-8 and 1.24 × 10-7 M, respectively. The sensing mechanism of R1 toward Cu2+ and Fe3+ was confirmed using density functional theory calculations and electrostatic potential analysis. Test strips of R1 were fabricated successfully for on-site detection of Cu2+ and Fe3+. In addition, R1 was applied to recognize Cu2+ and Fe3+ in actual water samples with satisfactory recovery.
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Affiliation(s)
- Manman Shi
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Mingyi Kang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Peng Liu
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Han Zhou
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Meishan Pei
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Guangyou Zhang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
| | - Xiaofeng Yang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, China
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Huang X, Yan Y, Zhang L, Yuan L, Tang Y, Jiang X, Zhu W, Yuan Y, Nie J, Zhang Y. Simple, sensitive, colorimetric detection of pyrophosphate via the analyte-triggered decomposition of metal-organic frameworks regulating their adaptive multi-color Tyndall effect. Anal Bioanal Chem 2024; 416:1821-1832. [PMID: 38363308 DOI: 10.1007/s00216-024-05200-4] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/24/2024] [Accepted: 02/01/2024] [Indexed: 02/17/2024]
Abstract
This paper describes initially the application of the Tyndall effect (TE) of metal-organic framework (MOF) materials as a colorimetric signaling strategy for the sensitive detection of pyrophosphate ion (PPi). The used MOF NH2-MIL-101(Fe) was prepared with Fe3+ ions and fluorescent ligands of 2-amino terephthalic acid (NH2-BDC). The fluorescence of NH2-BDC in MOF is quenched due to the ligand-to-metal charge transfer effect, while the NH2-MIL-101(Fe) suspension shows a strong TE. In the presence of PPi analyte, the MOFs will undergo decomposition because of the competitive binding of Fe3+ by PPi over NH2-BDC, resulting in a significant decrease in the TE signal and fluorescence restoration from the released ligands. The results demonstrate that the new method only requires a laser pointer pen (for TE creation) and a smartphone (for portable quantitative readout) to detect PPi in a linear concentration range of 1.25-800 μM, with a detection limit of ~210 nM (3σ) which is ~38 times lower than that obtained from traditional fluorescence with a spectrophotometer (linear concentration range, 50-800 µM; detection limit, 8.15 µM). Moreover, the acceptable recovery of PPi in several real samples (i.e., pond water, black tea, and human serum and urine) ranges from 97.66 to 119.15%.
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Affiliation(s)
- Xueer Huang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China
| | - Yongkang Yan
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China
| | - Lang Zhang
- Institute of Rheumatology and Immunology, Affiliated Hospital of North Sichuan Medical College, 234 Fujiang Road, Nanchong, 637000, People's Republic of China
| | - Lili Yuan
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China
| | - Yiyue Tang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China
| | - Xinqing Jiang
- Translational Medicine Research Center, North Sichuan Medical College, 234 Fujiang Road, Nanchong, 637000, People's Republic of China
| | - Wenli Zhu
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China
| | - Yali Yuan
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China
| | - Jinfang Nie
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China.
| | - Yun Zhang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin, 541004, People's Republic of China.
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Li Z, Zeman CJ, Valandro S, Bantang JPO, Schanze KS. Phosphates Induced H-Type or J-Type Aggregation of Cationic Porphyrins with Varied Side Chains. Molecules 2023; 28:4115. [PMID: 37241856 PMCID: PMC10223173 DOI: 10.3390/molecules28104115] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Non-covalent interactions have been extensively used to fabricate nanoscale architectures in supramolecular chemistry. However, the biomimetic self-assembly of diverse nanostructures in aqueous solution with reversibility induced by different important biomolecules remains a challenge. Here, we report the synthesis and aqueous self-assembly of two chiral cationic porphyrins substituted with different types of side chains (branched or linear). Helical H-aggregates are induced by pyrophosphate (PPi) as indicated by circular dichroism (CD) measurement, while J-aggregates are formed with adenosine triphosphate (ATP) for the two porphyrins. By modifying the peripheral side chains from linear to a branched structure, more pronounced H- or J-type aggregation was promoted through the interactions between cationic porphyrins and the biological phosphate ions. Moreover, the phosphate-induced self-assembly of the cationic porphyrins is reversible in the presence of the enzyme alkaline phosphatase (ALP) and repeated addition of phosphates.
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Affiliation(s)
- Zhiliang Li
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, USA; (Z.L.); (C.J.Z.IV); (S.V.); (J.P.O.B.)
- Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Charles J. Zeman
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, USA; (Z.L.); (C.J.Z.IV); (S.V.); (J.P.O.B.)
- Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Silvano Valandro
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, USA; (Z.L.); (C.J.Z.IV); (S.V.); (J.P.O.B.)
| | - Jose Paolo O. Bantang
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, USA; (Z.L.); (C.J.Z.IV); (S.V.); (J.P.O.B.)
| | - Kirk S. Schanze
- Department of Chemistry, University of Texas at San Antonio, San Antonio, TX 78249, USA; (Z.L.); (C.J.Z.IV); (S.V.); (J.P.O.B.)
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Mikkola S, Eguaogie O, Nieminen A, Conlon PF, Jakeman DL, Moore K, Lane IC, Vyle JS. 5'-Chalcogen-Substituted Nucleoside Pyrophosphate and Phosphate Monoester Analogues: Preparation and Hydrolysis Studies. Int J Mol Sci 2022; 23:ijms232415582. [PMID: 36555224 PMCID: PMC9778984 DOI: 10.3390/ijms232415582] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/01/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Novel sulfur and selenium substituted 5',5'-linked dinucleoside pyrophate analogues were prepared in a vibration ball mill from the corresponding persilylated monophosphate. The chemical hydrolysis of pyrophosphorochalcogenolate-linked dimers was studied over a wide pH-range. The effect of the chalcogeno-substitution on the reactivity of dinucleoside pyrophosphates was surprisingly modest, and the chemical stability is promising considering the potential therapeutic or diagnostic applications. The chemical stability of the precursor phosphorochalcogenolate monoesters was also investigated. Hydrolytic desilylation of these materials was effected in aqueous buffer at pH 3, 7 or 11 and resulted in phosphorus-chalcogen bond scission which was monitored using 31P NMR. The rate of dephosphorylation was dependent upon both the nature of the chalcogen and the pH. The integrity of the P-S bond in the corresponding phosphorothiolate was maintained at high pH but rapidly degraded at pH 3. In contrast, P-Se bond cleavage of the phosphoroselenolate monoester was rapid and the rate increased with alkalinity. The results obtained in kinetic experiments provide insight on the reactivity of the novel pyrophosphates studied as well as of other types of thiosubstituted biological phosphates. At the same time, these results also provide evidence for possible formation of unexpectedly reactive intermediates as the chalcogen-substituted analogues are metabolised.
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Affiliation(s)
- Satu Mikkola
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland
- Correspondence: (S.M.); (J.S.V.)
| | - Olga Eguaogie
- School of Chemistry and Chemical Engineering, Queen’s University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK
| | - Anu Nieminen
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland
| | - Patrick F. Conlon
- School of Chemistry and Chemical Engineering, Queen’s University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK
- College of Pharmacy, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - David L. Jakeman
- College of Pharmacy, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Keith Moore
- School of Chemistry and Chemical Engineering, Queen’s University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK
| | - Ian C. Lane
- School of Chemistry and Chemical Engineering, Queen’s University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK
| | - Joseph S. Vyle
- School of Chemistry and Chemical Engineering, Queen’s University of Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK
- Correspondence: (S.M.); (J.S.V.)
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Qian M, Cheng Z, Luo G, Galluzzi M, Shen Y, Li Z, Yang H, Yu X. Molybdenum Diphosphide Nanorods with Laser-Potentiated Peroxidase Catalytic/Mild-Photothermal Therapy of Oral Cancer. Adv Sci (Weinh) 2022; 9:2101527. [PMID: 35059282 PMCID: PMC8728868 DOI: 10.1002/advs.202101527] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 08/29/2021] [Indexed: 05/04/2023]
Abstract
Chemodynamic therapy (CDT) is an emerging treatment that usually employs chemical agents to decompose hydrogen peroxide (H2O2) into hydroxyl radical (•OH) via Fenton or Fenton-like reactions, inducing cell apoptosis or necrosis by damaging biomacromolecules such as, lipids, proteins, and DNA. Generally, CDT shows high tumor-specificity and minimal-invasiveness in patients, thus it has attracted extensive research interests. However, the catalytic reaction efficiency of CDT is largely limited by the relatively high pH at the tumor sites. Herein, a 808 nm laser-potentiated peroxidase catalytic/mild-photothermal therapy of molybdenum diphosphide nanorods (MoP2 NRs) is developed to improve CDT performance, and simultaneously achieve effective tumor eradication and anti-infection. In this system, MoP2 NRs exhibit a favorable cytocompatibility due to their inherent excellent elemental biocompatibility. Upon irradiation with an 808 nm laser, MoP2 NRs act as photosensitizers to efficiently capture the photo-excited band electrons and valance band holes, exhibiting enhanced peroxidase-like catalytic activity to sustainedly decompose tumor endogenous H2O2 to •OH, which subsequently destroy the cellular biomacromolecules both in tumor cells and bacteria. As demonstrated both in vitro and in vivo, this system exhibits a superior therapeutic efficiency with inappreciable toxicity. Hence, the work may provide a promising therapeutic technique for further clinical applications.
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Affiliation(s)
- Min Qian
- Department of Oral and Maxillofacial SurgeryGuangdong Provincial High‐level Clinical Key SpecialtyGuangdong Province Engineering Research Center of Oral Disease Diagnosis and TreatmentPeking University Shenzhen HospitalGuangdong518036P. R. China
| | - Ziqiang Cheng
- Materials and Interfaces CenterShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
| | - Guanghong Luo
- Department of Radiation OncologyThe Second Clinical Medical CollegeJinan University (Shenzhen People's Hospital)ShenzhenGuangdong518020P. R. China
| | - Massimiliano Galluzzi
- Materials and Interfaces CenterShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
| | - Yuehong Shen
- Department of Oral and Maxillofacial SurgeryGuangdong Provincial High‐level Clinical Key SpecialtyGuangdong Province Engineering Research Center of Oral Disease Diagnosis and TreatmentPeking University Shenzhen HospitalGuangdong518036P. R. China
| | - Zhibin Li
- Materials and Interfaces CenterShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
| | - Hongyu Yang
- Department of Oral and Maxillofacial SurgeryGuangdong Provincial High‐level Clinical Key SpecialtyGuangdong Province Engineering Research Center of Oral Disease Diagnosis and TreatmentPeking University Shenzhen HospitalGuangdong518036P. R. China
| | - Xue‐Feng Yu
- Materials and Interfaces CenterShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
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Anashkin VA, Malinen AM, Bogachev AV, Baykov AA. Catalytic Asymmetry in Homodimeric H +-Pumping Membrane Pyrophosphatase Demonstrated by Non-Hydrolyzable Pyrophosphate Analogs. Int J Mol Sci 2021; 22:ijms22189820. [PMID: 34575984 PMCID: PMC8469034 DOI: 10.3390/ijms22189820] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/23/2021] [Accepted: 09/08/2021] [Indexed: 02/08/2023] Open
Abstract
Membrane-bound inorganic pyrophosphatase (mPPase) resembles the F-ATPase in catalyzing polyphosphate-energized H+ and Na+ transport across lipid membranes, but differs structurally and mechanistically. Homodimeric mPPase likely uses a “direct coupling” mechanism, in which the proton generated from the water nucleophile at the entrance to the ion conductance channel is transported across the membrane or triggers Na+ transport. The structural aspects of this mechanism, including subunit cooperation, are still poorly understood. Using a refined enzyme assay, we examined the inhibition of K+-dependent H+-transporting mPPase from Desulfitobacterium hafniensee by three non-hydrolyzable PPi analogs (imidodiphosphate and C-substituted bisphosphonates). The kinetic data demonstrated negative cooperativity in inhibitor binding to two active sites, and reduced active site performance when the inhibitor or substrate occupied the other active site. The nonequivalence of active sites in PPi hydrolysis in terms of the Michaelis constant vanished at a low (0.1 mM) concentration of Mg2+ (essential cofactor). The replacement of K+, the second metal cofactor, by Na+ increased the substrate and inhibitor binding cooperativity. The detergent-solubilized form of mPPase exhibited similar active site nonequivalence in PPi hydrolysis. Our findings support the notion that the mPPase mechanism combines Mitchell’s direct coupling with conformational coupling to catalyze cation transport across the membrane.
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Affiliation(s)
- Viktor A. Anashkin
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia; (V.A.A.); (A.V.B.)
| | - Anssi M. Malinen
- Department of Life Technologies, University of Turku, FIN-20014 Turku, Finland;
| | - Alexander V. Bogachev
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia; (V.A.A.); (A.V.B.)
| | - Alexander A. Baykov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia; (V.A.A.); (A.V.B.)
- Correspondence:
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11
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Melnikova N, Malygina D, Balakireva A, Peretyagin P, Revin V, Devyataeva A, Malafeeva K, Revin V. The Effect of Betulin Diphosphate in Wound Dressings of Bacterial Cellulose-ZnO NPs on Platelet Aggregation and the Activity of Oxidoreductases Regulated by NAD(P)+/NAD(P)H-Balance in Burns on Rats. Molecules 2021; 26:5478. [PMID: 34576949 PMCID: PMC8469126 DOI: 10.3390/molecules26185478] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 11/21/2022] Open
Abstract
The inhibition of platelet aggregation, and the activity of oxidoreductases and microhemocirculation in a burn wound on the treatment of burns with wound dressings based on bacterial nanocellulose (BC)-zinc oxide nanoparticles (ZnO NPs)-betulin diphosphate (BDP) were studied. The control of the treatment by BC-ZnO NPs-BDP on burned rats by the noninvasive DLF method showed an increase in perfusion and the respiratory component in wavelet spectra, characterizing an improvement in oxygen saturation in the wound. The study on the volunteers' blood found the inhibition of ADP-induced platelet aggregation by 30-90%. Disaggregation depends on the dose under the action of the ionized form of BDP and ZnO NPs-BDP in a phosphate buffer; it was reversible and had two waves. It was shown on rats that the specific activity of LDHreverse and LDHdirect (control-intact animals) on day 21 of treatment increased by 11-38% and 23%, respectively. The LDHreverse/LDHdirect ratio increased at BC-ZnO NPs-BDP treatment, which characterizes efficient NAD+ regeneration. AlDH activity increased significantly in the first 10 days by 70-170%, reflecting the effectiveness of the enzyme and NAD+ in utilizing toxic aldehydes at this stage of burn disease. The activities of GR and G6PDH using NADP(H) were increased with BC-ZnO NPs-BDP treatment.
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Affiliation(s)
- Nina Melnikova
- Faculty of Chemistry, Lobachevsky University, 23/5 Gagarin Av., 603950 Nizhny Novgorod, Russia
| | - Darina Malygina
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, 10/1 Minin Sq., 603950 Nizhny Novgorod, Russia;
| | - Alyona Balakireva
- Central Research Laboratory, Privolzhsky Research Medical University, 10/1 Minin Sq., 603950 Nizhny Novgorod, Russia; (A.B.); (P.P.)
| | - Peter Peretyagin
- Central Research Laboratory, Privolzhsky Research Medical University, 10/1 Minin Sq., 603950 Nizhny Novgorod, Russia; (A.B.); (P.P.)
| | - Vadim Revin
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia; (V.R.); (A.D.); (K.M.); (V.R.)
| | - Anna Devyataeva
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia; (V.R.); (A.D.); (K.M.); (V.R.)
| | - Kseniya Malafeeva
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia; (V.R.); (A.D.); (K.M.); (V.R.)
| | - Viktor Revin
- Department of Biotechnology, Bioengineering and Biochemistry, National Research Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia; (V.R.); (A.D.); (K.M.); (V.R.)
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12
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De Melo N, Murrell L, Islam MT, Titman JJ, Macri-Pellizzeri L, Ahmed I, Sottile V. Tailoring Pyro-and Orthophosphate Species to Enhance Stem Cell Adhesion to Phosphate Glasses. Int J Mol Sci 2021; 22:ijms22020837. [PMID: 33467686 PMCID: PMC7829838 DOI: 10.3390/ijms22020837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/11/2021] [Accepted: 01/13/2021] [Indexed: 12/29/2022] Open
Abstract
Phosphate-based glasses (PBGs) offer significant therapeutic potential due to their bioactivity, controllable compositions, and degradation rates. Several PBGs have already demonstrated their ability to support direct cell growth and in vivo cytocompatibility for bone repair applications. This study investigated development of PBG formulations with pyro- and orthophosphate species within the glass system (40 − x)P2O5·(16 + x)CaO·20Na2O·24MgO (x = 0, 5, 10 mol%) and their effect on stem cell adhesion properties. Substitution of phosphate for calcium revealed a gradual transition within the glass structure from Q2 to Q0 phosphate species. Human mesenchymal stem cells were cultured directly onto discs made from three PBG compositions. Analysis of cells seeded onto the discs revealed that PBG with higher concentration of pyro- and orthophosphate content (61% Q1 and 39% Q0) supported a 4.3-fold increase in adhered cells compared to glasses with metaphosphate connectivity (49% Q2 and 51% Q1). This study highlights that tuning the composition of PBGs to possess pyro- and orthophosphate species only, enables the possibility to control cell adhesion performance. PBGs with superior cell adhesion profiles represent ideal candidates for biomedical applications, where cell recruitment and support for tissue ingrowth are of critical importance for orthopaedic interventions.
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Affiliation(s)
- Nigel De Melo
- School of Medicine, University of Nottingham, Nottingham NG7 2RD, UK; (N.D.M.); (L.M.-P.)
| | - Lauren Murrell
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK; (L.M.); (M.T.I.)
| | - Md Towhidul Islam
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK; (L.M.); (M.T.I.)
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Jeremy J. Titman
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK;
| | - Laura Macri-Pellizzeri
- School of Medicine, University of Nottingham, Nottingham NG7 2RD, UK; (N.D.M.); (L.M.-P.)
| | - Ifty Ahmed
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK; (L.M.); (M.T.I.)
- Correspondence: (I.A.); (V.S.)
| | - Virginie Sottile
- School of Medicine, University of Nottingham, Nottingham NG7 2RD, UK; (N.D.M.); (L.M.-P.)
- Department of Molecular Medicine, The University of Pavia, 27100 Pavia, Italy
- Correspondence: (I.A.); (V.S.)
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Shears SB, Wang H. Metabolism and Functions of Inositol Pyrophosphates: Insights Gained from the Application of Synthetic Analogues. Molecules 2020; 25:E4515. [PMID: 33023101 PMCID: PMC7583957 DOI: 10.3390/molecules25194515] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/25/2020] [Accepted: 09/27/2020] [Indexed: 12/17/2022] Open
Abstract
Inositol pyrophosphates (PP-InsPs) comprise an important group of intracellular, diffusible cellular signals that a wide range of biological processes throughout the yeast, plant, and animal kingdoms. It has been difficult to gain a molecular-level mechanistic understanding of the actions of these molecules, due to their highly phosphorylated nature, their low levels, and their rapid metabolic turnover. More recently, these obstacles to success are being surmounted by the chemical synthesis of a number of insightful PP-InsP analogs. This review will describe these analogs and will indicate the important chemical and biological information gained by using them.
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Affiliation(s)
- Stephen B. Shears
- Inositol Signaling Group, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA;
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14
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Ai M, Jiang A. Phosphorylation modification affects the gelation behavior of alkali-induced duck egg white gels. Food Chem 2020; 340:128185. [PMID: 33010647 DOI: 10.1016/j.foodchem.2020.128185] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 09/10/2020] [Accepted: 09/22/2020] [Indexed: 11/30/2022]
Abstract
In this study, sodium tripolyphosphate (STP) and tetrasodium pyrophosphate (TSPP) were utilized to modify duck egg white protein (EWP). The phosphorylated EWP was prepared as egg white gel (EWG) by adding sodium hydroxide. The phosphorus content of EWP reached 2.18 mg/g and 2.07 mg/g with the addition of STP and TSPP, respectively, after 2 h phosphorylation. The average particle size, absolute zeta potential value, and surface hydrophobicity of EWP increased significantly during phosphorylation. FTIR results indicate that phosphorylation reduced the random structure and α-helical content while increasing the content of β-sheets and β-turn. The mechanical and rheological properties of EWG decreased obviously after phosphorylation. A three-dimensional porous network microstructure was formed, and the gel with added TSPP had larger pores. Adding STP and TSPP to EWG weakened its salt and solvent sensitivity. The findings provide a direction for the exploration of gel properties after protein modification.
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Affiliation(s)
- Minmin Ai
- The National Center for Precision Machining and Safety of Livestock and Poultry Products Joint Engineering Research Center, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Aimin Jiang
- The National Center for Precision Machining and Safety of Livestock and Poultry Products Joint Engineering Research Center, College of Food Science, South China Agricultural University, Guangzhou, 510642, China.
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15
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Yi Y, Wang L, Chen L, Lin Y, Luo Z, Chen Z, Li T, Wu J, Zhong Z. Farnesal-loaded pH-sensitive polymeric micelles provided effective prevention and treatment on dental caries. J Nanobiotechnology 2020; 18:89. [PMID: 32527262 PMCID: PMC7291565 DOI: 10.1186/s12951-020-00633-2] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 05/12/2020] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Farnesol is a sesquiterpene from propolis and citrus fruit that shows promising anti-bacterial activity for caries treatment and prevention, but its hydrophobicity limits the clinical application. We aimed to develop the novel polymeric micelles (PMs) containing a kind of derivative of farnesol and a ligand of pyrophosphate (PPi) that mediated PMs to adhere tightly with the tooth enamel. RESULTS Farnesal (Far) was derived from farnesol and successfully linked to PEG via an acid-labile hydrazone bond to form PEG-hyd-Far, which was then conjugated to PPi and loaded into PMs to form the aimed novel drug delivery system, PPi-Far-PMs. The in vitro test about the binding of PPi-Far-PMs to hydroxyapatite showed that PPi-Far-PMs could bind rapidly to hydroxyapatite and quickly release Far under the acidic conditions. Results from the mechanical testing and the micro-computed tomography indicated that PPi-Far-PMs could restore the microarchitecture of teeth with caries. Moreover, PPi-Far-PMs diminished the incidence and severity of smooth and sulcal surface caries in rats that were infected with Streptococcus mutans while being fed with a high-sucrose diet. The anti-caries efficacy of free Far can be improved significantly by PPi-Far-PMs through the effective binding of it with tooth enamel via PPi. CONCLUSIONS This novel drug-delivery system may be useful for the treatment and prevention of dental caries as well as the targeting therapy of anti-bacterial drugs in the oral disease.
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Affiliation(s)
- Youping Yi
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Lujun Wang
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Lin Chen
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Yan Lin
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Zhongling Luo
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Zhenyu Chen
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Ting Li
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Jianming Wu
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China.
| | - Zhirong Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China.
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16
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Essehli R, Sabri S, El-Mellouhi F, Aïssa B, Ben Yahia H, Altamash T, Khraisheh M, Amhamed A, El Bali B. Single crystal structure, vibrational spectroscopy, gas sorption and antimicrobial properties of a new inorganic acidic diphosphates material (NH 4) 2Mg(H 2P 2O 7) 2•2H 2O. Sci Rep 2020; 10:8909. [PMID: 32483192 PMCID: PMC7264148 DOI: 10.1038/s41598-020-65718-2] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/30/2020] [Indexed: 11/08/2022] Open
Abstract
We report on the successful synthesis of diammonium magnesium dihydrogendiphosphate (V) dihydrate compound (NH4)2Mg(H2P2O7)2•2H2O using a wet chemical route. Single crystal X-ray diffraction analysis and micro Raman spectroscopy are employed to characterize the compound. We demonstrate, using a multidisciplinary approach, that this compound is ideal for carbon dioxide (CO2) capture in addition to other anthropogenic gasses. We show here -from both an experimental as well as from a density functional theory (DFT) calculations routes- the potential for adopting this compound into domestic air-conditioning units (ACUs). From these experiments, the resistance to bacterial growth is also investigated, which is critical for the adoption of this compound in ACUs. Our compound exhibits a higher methane (CH4) sorptivity as compared to CO2 at 25 °C and 45 °C under pressures up to 50 bars. Furthermore, DFT electronic structure calculations are used to compute the main structural and electronic properties of the compound, taking into consideration the characteristics of the identified pores as a function of the progressive CO2 vs. CH4 loadings. Finally, the antibacterial assay reveals a strong antibacterial activity against the tested Gram-positive and Gram-negative bacteria, with a large zone of inhibition against the tested E. Coli, S. Aureus and K. Pneumonia.
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Affiliation(s)
- Rachid Essehli
- Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
| | - Souhir Sabri
- Qatar Environment & Energy Research institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 34110, Doha, Qatar
| | - Fedwa El-Mellouhi
- Qatar Environment & Energy Research institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 34110, Doha, Qatar
| | - Brahim Aïssa
- Qatar Environment & Energy Research institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 34110, Doha, Qatar.
| | - Hamdi Ben Yahia
- Qatar Environment & Energy Research institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 34110, Doha, Qatar
| | - Tausif Altamash
- Qatar Environment & Energy Research institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 34110, Doha, Qatar
| | - Majeda Khraisheh
- Chemical Engineering Department, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Abdulkarem Amhamed
- Qatar Environment & Energy Research institute (QEERI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, P.O. Box 34110, Doha, Qatar.
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Sikdar A, Wang J, Hasanuzzaman M, Liu X, Feng S, Roy R, Sial TA, Lahori AH, Arockiam Jeyasundar PGS, Wang X. Phytostabilization of Pb-Zn Mine Tailings with Amorpha fruticosa Aided by Organic Amendments and Triple Superphosphate. Molecules 2020; 25:molecules25071617. [PMID: 32244753 PMCID: PMC7181007 DOI: 10.3390/molecules25071617] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 02/07/2023] Open
Abstract
A greenhouse pot trial was conducted to investigate the effect of organic amendments combined with triple superphosphate on the bioavailability of heavy metals (HMs), Amorpha fruticosa growth and metal uptake from Pb-Zn mine tailings. Cattle manure compost (CMC), spent mushroom compost (SMC) and agricultural field soil (AFS) were applied to tailings at 5%, 10%, 20% and 30% w/w ratio, whereas sewage sludge (SS) and wood biochar (WB) were mixed at 2.5%, 5%, 10% and 20% w/w ratio. Triple superphosphate (TSP) was added to all the treatments at 4:1 (molar ratio). Amendments efficiently decreased DTPA-extracted Pb, Zn, Cd and Cu in treatments. Chlorophyll contents and shoot and root dry biomass significantly (p < 0.05) increased in the treatments of CMC (except T4 for chlorophyll b) and SMC, whereas treatments of SS (except T1 for chlorophyll a and b), WB and AFS (except T4 for chlorophyll a and b) did not show positive effects as compared to CK1. Bioconcentration factor (BCF) and translocation factor (TF) values in plant tissues were below 1 for most treatments. In amended treatments, soluble protein content increased, phenylalanine ammonialyase (PAL) and polyphenol oxidase (PPO) decreased, and catalase (CAT) activity showed varied results as compared to CK1 and CK2. Results suggested that A. fruticosa can be a potential metal phytostabilizer and use of CMC or SMC in combination with TSP are more effective than other combinations for the in situ stabilization of Pb-Zn mine tailings.
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Affiliation(s)
- Ashim Sikdar
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (A.S.); (R.R.); or (T.A.S.); (P.G.S.A.J.)
- Department of Agroforestry and Environmental Science, Sylhet Agricultural University, Sylhet 3100, Bangladesh
| | - Jinxin Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (A.S.); (R.R.); or (T.A.S.); (P.G.S.A.J.)
- Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling 712100, China
- Correspondence: or ; Tel.: +86-029-8708-0055
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh;
| | - Xiaoyang Liu
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; (X.L.); (S.F.); (X.W.)
| | - Shulin Feng
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; (X.L.); (S.F.); (X.W.)
| | - Rana Roy
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (A.S.); (R.R.); or (T.A.S.); (P.G.S.A.J.)
- Department of Agroforestry and Environmental Science, Sylhet Agricultural University, Sylhet 3100, Bangladesh
| | - Tanveer Ali Sial
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; (A.S.); (R.R.); or (T.A.S.); (P.G.S.A.J.)
- Department of Soil Science, Sindh Agriculture University, Tandojam 70060, Pakistan
| | - Altaf Hussain Lahori
- Department of Environmental Sciences, Sindh Madressatul Islam University, Karachi 74000, Pakistan;
| | | | - Xiuqing Wang
- Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China; (X.L.); (S.F.); (X.W.)
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Sierra Aragón M, Nakamaru YM, García-Carmona M, Martínez Garzón FJ, Martín Peinado FJ. The role of organic amendment in soils affected by residual pollution of potentially harmful elements. Chemosphere 2019; 237:124549. [PMID: 31549661 DOI: 10.1016/j.chemosphere.2019.124549] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 05/13/2019] [Revised: 07/29/2019] [Accepted: 08/08/2019] [Indexed: 06/10/2023]
Abstract
The addition of organic amendment in soils affected by residual pollution of potentially harmful elements (PHEs) is evaluated. The area was polluted twenty years ago and remediation actions were intensively applied, but evidence of pollution are still detected in some sectors. The amendment application produces significant changes in the main soil properties and modifies the mobility and availability of the pollutants. In general, Cu, Zn, Cd and Pb, showed a significant reduction in soluble and exchangeable forms after the vermicompost addition (percentage of reduction ranging from 59% for soluble Pb to 95% for exchangeable Zn), both in highly (UVS) as in moderately (VS1) polluted soils. This reduction is strongly related to the rise in OC content and pH. Arsenic presented no significant reduction or even an increase in soluble forms in moderately polluted soils (VS1), where the competing effects of OC and phosphorous could be responsible for this increase. Pb also showed an increase in availability after vermicompost application, probably related to the competing effect of Mg2+ coming from the organic amendment. The less mobile forms (those extracted with oxalic-oxalate, pyrophosphate and EDTA), indicate that vermicompost application reduce medium-long term mobility to similar values of those found in less polluted soils (VS2); anyway, an increase in available forms of Pb and As was detected in some cases, indicating a potential risk of toxicity that should be monitored over time.
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Affiliation(s)
- Manuel Sierra Aragón
- Departamento de Edafología y Química Agrícola, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva S/n, 18002, Granada, Spain
| | - Yasuo Mitsui Nakamaru
- Laboratory of Integrated Crop Management Science, Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido, 099-2493, Japan
| | - Minerva García-Carmona
- Departamento de Agroquímica y Medio Ambiente, Universidad Miguel Hernández, Avda. Universidad, S/n. Edificio Alcudia, Elche, 03202, Alicante, Spain.
| | - Francisco Javier Martínez Garzón
- Departamento de Edafología y Química Agrícola, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva S/n, 18002, Granada, Spain
| | - Francisco José Martín Peinado
- Departamento de Edafología y Química Agrícola, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva S/n, 18002, Granada, Spain
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Peng S, Li H, Xu Q, Lin X, Wang Y. Addition of zeolite and superphosphate to windrow composting of chicken manure improves fertilizer efficiency and reduces greenhouse gas emission. Environ Sci Pollut Res Int 2019; 26:36845-36856. [PMID: 31745796 DOI: 10.1007/s11356-019-06544-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 06/05/2019] [Accepted: 09/16/2019] [Indexed: 06/10/2023]
Abstract
This study investigated the impact of adding zeolite (F), superphosphate (G), and ferrous sulfate (L) in various combinations on reducing greenhouse gas (GHG) emission and improving nitrogen conservation during factory-scale chicken manure composting, aimed to identify the combination that optimizes the performance of the process. Chicken manure was mixed with F, G, FL, or FGL and subjected to windrow composting for 46 days. Results showed that global warming potential (GWP) was reduced by 21.9% (F), 22.8% (FL), 36.1% (G), and 39.3% (FGL). Further, the nitrogen content in the final composting product increased by 27.25%, 9.45%, and 21.86% in G, FL, and FGL amendments, respectively. The fertilizer efficiency of the compost product was assessed by measuring the biomass of plants grown in it, and it was consistent with the nitrogen content. N2O emission was negligible during composting, and 98% of the released GHGs comprised CO2 and CH4. Reduction in GHG emission was mainly achieved by reducing CH4 emission. The addition of FL, G, and FGL caused a clear shift in the abundance of dominant methanogens; particularly, the abundance of Methanobrevibacter decreased and that of Methanobacterium and Methanocella increased, which was correlated with CH4 emissions. Meanwhile, the changes in moisture content, NH4+-N content, and pH level also played an important role in the reduction of GHG emission. Based on the effects of nitrogen conservation, fertilizer efficiency improvement, and GHG emission reduction, we conclude that G and FGL are more beneficial than F or FL and suggest these additives for efficient chicken manure composting.
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Affiliation(s)
- Shuang Peng
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, Jiangsu, China
- College of Environment and Ecology, Jiangsu Open University, Nanjing, 210017, Jiangsu, China
| | - Huijie Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, Jiangsu, China
| | - Qianqian Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, Jiangsu, China
| | - Xiangui Lin
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, Jiangsu, China
| | - Yiming Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, Jiangsu, China.
- Department of Biology and Biochemistry, Institute of Soil Science, Chinese Academy of Sciences, East Road, 71, Nanjing, 210008, Jiangsu, China.
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20
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Cai Y, He Y, He K, Gao H, Ren M, Qu G. Degradation mechanism of lignocellulose in dairy cattle manure with the addition of calcium oxide and superphosphate. Environ Sci Pollut Res Int 2019; 26:33683-33693. [PMID: 31595408 DOI: 10.1007/s11356-019-06444-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 06/15/2018] [Accepted: 09/05/2019] [Indexed: 06/10/2023]
Abstract
Cellulose and lignin belongs to refractory organic matters in the traditional composting. In this research, the degradation of lignocellulose in dairy cattle manure was investigated through adding calcium oxide (CaO) and superphosphate (SSP). In the presence of CaO and SSP, the degradation rate of cellulose and lignin were improved by 25.0% and 8.33%, respectively. The results indicated that the pH value in system would be slightly higher with the addition of CaO and SSP. Besides, the pH value of all cow manure piles were about 8.4 after composting rotten, which could be well neutralized by the gradually acidified soil in the southwest of China with the full effect of fertilizer released. In addition, the abundance of Bacillales, Actinomycetes, and Thermoactinomycetaceae in the experimental groups (AR) was slightly better than that in the control groups (CK) during composting, which led to a conclusion that an elaborate physical-chemical-multivariate aerobic microorganism evolution model of cellulose degradation products (PCMC) was deduced and the physical-chemical-multivariate aerobic microorganism model of lignin cycle degradation (PCML) was developed.
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Affiliation(s)
- Yingying Cai
- Faculty of Environmental Science & Engineering, Kunming University of Science &Technology, Kunming, 650500, Yunnan, China
| | - Yanhua He
- Faculty of Environmental Science & Engineering, Kunming University of Science &Technology, Kunming, 650500, Yunnan, China
| | - Kang He
- Faculty of Environmental Science & Engineering, Kunming University of Science &Technology, Kunming, 650500, Yunnan, China
| | - Haijun Gao
- Faculty of Environmental Science & Engineering, Kunming University of Science &Technology, Kunming, 650500, Yunnan, China
| | - Meijie Ren
- Faculty of Environmental Science & Engineering, Kunming University of Science &Technology, Kunming, 650500, Yunnan, China
| | - Guangfei Qu
- Faculty of Environmental Science & Engineering, Kunming University of Science &Technology, Kunming, 650500, Yunnan, China.
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21
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Si Y, Wang X, Yang G, Yang T, Li Y, Ayala GJ, Li X, Wang H, Su J. Crystal Structures of Pyrophosphatase from Acinetobacter baumannii: Snapshots of Pyrophosphate Binding and Identification of a Phosphorylated Enzyme Intermediate. Int J Mol Sci 2019; 20:ijms20184394. [PMID: 31500178 PMCID: PMC6770254 DOI: 10.3390/ijms20184394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 08/31/2019] [Accepted: 09/03/2019] [Indexed: 11/26/2022] Open
Abstract
All living things have pyrophosphatases that hydrolyze pyrophosphate and release energy. This energetically favorable reaction drives many energetically unfavorable reactions. An accepted catalytic model of pyrophosphatase shows that a water molecule activated by two divalent cations (M1 and M2) within the catalytic center can attack pyrophosphate in an SN2 mechanism and thus hydrolyze the molecule. However, our co-crystal structure of Acinetobacter baumannii pyrophosphatase with pyrophosphate shows that a water molecule from the solvent may, in fact, be the actual catalytic water. In the co-crystal structure of the wild-type pyrophosphatase with pyrophosphate, the electron density of the catalytic centers of each monomer are different from one another. This indicates that pyrophosphates in the catalytic center are dynamic. Our mass spectroscopy results have identified a highly conserved lysine residue (Lys30) in the catalytic center that is phosphorylated, indicating that the enzyme could form a phosphoryl enzyme intermediate during hydrolysis. Mutation of Lys30 to Arg abolished the activity of the enzyme. In the structure of the apo wild type enzyme, we observed that a Na+ ion is coordinated by residues within a loop proximal to the catalytic center. Therefore, we mutated three key residues within the loop (K143R, P147G, and K149R) and determined Na+ and K+-induced inhibition on their activities. Compared to the wild type enzyme, P147G is most sensitive to these cations, whereas K143R was inactive and K149R showed no change in activity. These data indicate that monovalent cations could play a role in down-regulating pyrophosphatase activity in vivo. Overall, our results reveal new aspects of pyrophosphatase catalysis and could assist in the design of specific inhibitors of Acinetobacter baumannii growth.
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Affiliation(s)
- Yunlong Si
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Xing Wang
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Guosong Yang
- Zhongke Biopharm Co., LTD, East of Beijing, Beijing 101601, China
| | - Tong Yang
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Yuying Li
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Gabriela Jaramillo Ayala
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Xumin Li
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Hao Wang
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China
| | - Jiyong Su
- Jilin Province Key Laboratory on Chemistry and Biology of Natural Drugs in Changbai Mountain, School of Life Sciences, Northeast Normal University, Changchun 130024, China.
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22
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Deng F, Olvera-Vargas H, Garcia-Rodriguez O, Zhu Y, Jiang J, Qiu S, Yang J. Waste-wood-derived biochar cathode and its application in electro-Fenton for sulfathiazole treatment at alkaline pH with pyrophosphate electrolyte. J Hazard Mater 2019; 377:249-258. [PMID: 31170573 DOI: 10.1016/j.jhazmat.2019.05.077] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [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: 09/26/2018] [Revised: 02/01/2019] [Accepted: 05/26/2019] [Indexed: 05/03/2023]
Abstract
For the first time, a biomass-derived porous carbon cathode (WDC) was fabricated via a facile one-step pyrolysis of recovered wood-waste without any post-treatment. The WDC along with pyrophosphate (PP) as electrolyte were used in electro-Fenton (EF) at pH 8 for sulfathiazole (STZ) treatment. The H2O2 accumulation capacity of WDC was optimized via the following parameters: pyrolysis temperature, applied current and electrolyte. Results showed that the WDC cathode prepared at 900 °C achieved the highest H2O2 accumulation (13.80 mg L-1 in 3 h) due to its larger electroactive surface area (28.81 cm2). Interestingly, it was found that PP decreased the decomposition rate of H2O2 in solution as compared to conventional electrolyte, which resulted in higher H2O2 accumulation. PP allowed operating EF at pH of 8 due to the formation of Fe2+-PP complexes in solution. Moreover, Fe2+-PP was able to activate oxygen to produce OH. In this way, the degradation of STZ took place through four main pathways: 1) via OH from the Fe2+-PP complex, 2) via OH from EF reactions, 3) via surface OH at the boron doped diamond electrode (BDD) and 4) via SO4- from BDD activation. Finally, microtox tests revealed that some toxic intermediates were generated during WDC/BDD/PP EF treatment, but they were removed at the end of the process.
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Affiliation(s)
- Fengxia Deng
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China; School of Chemical and Environmental Engineering, Jiang Han University, Wuhan, 430056, PR China
| | - Hugo Olvera-Vargas
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore 117576, Singapore
| | - Orlando Garcia-Rodriguez
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Dr. 2, Singapore 117576, Singapore
| | - Yingshi Zhu
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Jizhou Jiang
- School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, PR China; School of Materials Science and Energy Engineering, Foshan University, Foshan 528000, PR China.
| | - Shan Qiu
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
| | - Jixian Yang
- State Key Laboratory of Urban Water Resources Center, Department of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, PR China.
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23
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Casabuono AC, Sisti F, Fernández J, Hozbor D, Couto AS. Bordetella bronchiseptica Glycosyltransferase Core Mutants Trigger Changes in Lipid A Structure. J Am Soc Mass Spectrom 2019; 30:1679-1689. [PMID: 31190311 DOI: 10.1007/s13361-019-02233-3] [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: 12/26/2018] [Revised: 03/25/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Bordetella bronchiseptica, known to infect animals and rarely humans, expresses a lipopolysaccharide that plays an essential role in host interactions, being critical for early clearance of the bacteria. On a B. bronchiseptica 9.73 isolate, mutants defective in the expression of genes involved in the biosynthesis of the core region were previously constructed. Herein, a comparative detailed structural analysis of the expressed lipids A by MALDI-TOF mass spectrometry was performed. The Bb3394 LPS defective in a 2-amino-2-deoxy-D-galacturonic acid lateral residue of the core presented a penta-acylated diglucosamine backbone modified with two glucosamine phosphates, similar to the wild-type lipid A. In contrast, BbLP39, resulting in the interruption of the LPS core oligosaccharide synthesis, presented lipid A species consisting in a diglucosamine backbone N-substituted with C14:0(3-O-C12:0) in C-2 and C14:0(3-O-C14:0) in C-2', O-acylated with C14:0(3-O-C10:0(3-OH) in C-3' and with a pyrophosphate in C-1. Regarding Bb3398 also presenting a rough LPS, the lipid A is formed by a hexa-acylated diglucosamine backbone carrying one pyrophosphate group in C-1 and one phosphate in C-4', both substituted with ethanolamine groups. As far as we know, this is the first description of a phosphoethanolamine modification in B. bronchiseptica lipid A. Our results demonstrate that although gene deletions were not directed to the lipid A moiety, each mutant presented different modifications. MALDI-TOF mass spectrometry was an excellent tool to highlight the structural diversity of the lipid A structures biosynthesized during its transit through the periplasm to the final localization in the outer surface of the outer membrane. Graphical Abstract.
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Affiliation(s)
- Adriana C Casabuono
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica - Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Universidad de Buenos Aires, Ciudad Universitaria, Intendente Güiraldes 2160, C1428GA, Buenos Aires, Argentina
| | - Federico Sisti
- Instituto de Biotecnología y Biología Molecular CCT La Plata CONICET, Facultad de Ciencias Exactas UNLP, La Plata, Argentina
| | - Julieta Fernández
- Instituto de Biotecnología y Biología Molecular CCT La Plata CONICET, Facultad de Ciencias Exactas UNLP, La Plata, Argentina
| | - Daniela Hozbor
- Instituto de Biotecnología y Biología Molecular CCT La Plata CONICET, Facultad de Ciencias Exactas UNLP, La Plata, Argentina
| | - Alicia S Couto
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica - Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Universidad de Buenos Aires, Ciudad Universitaria, Intendente Güiraldes 2160, C1428GA, Buenos Aires, Argentina.
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24
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Abstract
The Nudix hydrolase superfamily is identified by a conserved cassette of 23 amino acids, and it is characterized by its pyrophosphorylytic activity on a wide variety of nucleoside diphosphate derivatives. Of the 13 members of the family in Escherichia coli, only one, Orf180, has not been identified with a substrate, although a host of nucleoside diphosphate compounds has been tested. Several reports have noted a strong similarity in the three-dimensional structure of the unrelated enzyme, isopentenyl diphosphate isomerase (IDI) to the Nudix structure, and the report that a Nudix enzyme was involved in the synthesis of geraniol, a product of the two substrates of IDI, prompted an investigation of whether the IDI substrates, isopentenyl diphosphate (IPP), and dimethylallyl diphosphate (DAPP) could be substrates of Orf180. This article demonstrates that Orf180 does have a very low activity on IPP, DAPP, and geranyl pyrophosphate (GPP). However, several of the other Nudix enzymes with established nucleoside diphosphate substrates hydrolyze these compounds at substantial rates. In fact, some Nudix hydrolases have higher activities on IPP, DAPP, and GPP than on their signature nucleoside diphosphate derivatives.
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Affiliation(s)
- Maurice J. Bessman
- Department of BiologyJohns Hopkins UniversityBaltimoreMaryland21218‐2684
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25
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Sadergaski LR, Perry SN, Tholen LR, Hixon AE. Evidence for non-electrostatic interactions between a pyrophosphate-functionalized uranyl peroxide nanocluster and iron (hydr)oxide minerals. Environ Sci Process Impacts 2019; 21:1174-1183. [PMID: 31187835 DOI: 10.1039/c9em00139e] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The terminal oxygen atoms of the pyrophosphate groups in the uranyl peroxide nanocluster U24Pp12 ([(UO2)24(O2)24(P2O7)12]48-) are not fully satisfied by bond valence considerations and can become protonated. This functionality could allow for specific interactions with mineral surfaces, as opposed to the electrostatically-driven interactions observed between non-functionalized uranyl peroxide nanoclusters and mineral surfaces. The sorption of U24Pp12 to goethite and hematite was studied using batch sorption experiments as a function of U24Pp12 concentration, mineral concentration, and pH. A suite of spectroscopic techniques, scanning electron microscopy, and electrophoretic mobility measurements were used to examine the minerals before and after reaction with U24Pp12, leading to a proposed conceptual model for U24Pp12 interactions with goethite. The governing rate laws were determined and compared to those previously determined for a non-functionalized uranyl peroxide nanocluster. The rate of uranyl peroxide nanocluster sorption depends on the charge density and functionalized component of the uranyl peroxide cage. Electrophoretic mobility and attenuated total reflectance Fourier transform infrared spectroscopy analyses show that an inner-sphere complex forms between the U24Pp12 cluster and the goethite surface through the terminal pyrophosphate groups, leading to a proposed conceptual model in which U24Pp12 interacts with the triply-coordinated reactive sites on the (110) plane of goethite. These results demonstrate that the behavior of U24Pp12 at the iron (hydr)oxide-water interface is unique relative to interactions of the uranyl ion and non-functionalized uranyl peroxide nanoclusters.
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Affiliation(s)
- Luke R Sadergaski
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Samuel N Perry
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Luke R Tholen
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Amy E Hixon
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.
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26
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Luo Z, Wang D, Yang J, Huang H, Su G. The effect of fermented superphosphate pretreatment and step-feed mode on biological denitrification of piggery wastewater. Sci Total Environ 2019; 665:724-730. [PMID: 30786261 DOI: 10.1016/j.scitotenv.2019.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 01/04/2019] [Revised: 01/30/2019] [Accepted: 02/01/2019] [Indexed: 06/09/2023]
Abstract
Chemical pretreatment can reduce NH3-N levels in piggery wastewater to a certain extent, but the lack of a carbon source for subsequent biological treatment leads to a low denitrification efficiency and poor total nitrogen (TN) removal percentage. Taking superphosphate (SP) pretreatment (SP/Pretreatment) as the control, this research studies the influence of fermented superphosphate (FSP; SP plus a carbon source) pretreatment (FSP/Pretreatment) on biological denitrification in a subsequent biological treatment step. Furthermore, the removal of pollutants under different influent modes is also evaluated. The experimental results show that with the addition of the SP pretreatment, the removal percentage of NH3-N was 52%, and the chemical oxygen demand (COD)/TN ratio increased from 0.36 to 0.71. However, with the addition of the FSP pretreatment, the removal percentage of NH3-N reached 64%, and the COD/TN ratio increased to 2.28. The combination of the FSP pretreatment and a subsequent sequencing batch reactor (SBR) step in the step-feed influent mode resulted in the best denitrification, with a TN removal percentage of 57%. This result was 51% higher than that of the SP/Pretreatment-SBR system, indicating that the addition of the FSP pretreatment improves the biological denitrification of piggery wastewater. After the full treatment process for piggery wastewater, the effluent COD was 57.33 mg·L-1, the NH3-N was 66.32 mg·L-1, and the total phosphorus (TP) was 1.17 mg·L-1, all of which meet the emission standards of the "Fouling Standards for Pollutants in the Livestock Breeding Industry" (GB 18596-2001) (400 mg·L-1 COD, 80 mg·L-1 NH3-N, 8 mg·L-1 TP).
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Affiliation(s)
- Zifeng Luo
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Dehan Wang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China.
| | - Jie Yang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Honghui Huang
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
| | - Guanyu Su
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
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27
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Kim E, Agarwal S, Kim N, Hage FS, Leonardo V, Gelmi A, Stevens MM. Bioinspired Fabrication of DNA-Inorganic Hybrid Composites Using Synthetic DNA. ACS Nano 2019; 13:2888-2900. [PMID: 30741535 PMCID: PMC6439439 DOI: 10.1021/acsnano.8b06492] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 02/06/2019] [Indexed: 05/19/2023]
Abstract
Nucleic acid nanostructures have attracted significant interest as potential therapeutic and diagnostic platforms due to their intrinsic biocompatibility and biodegradability, structural and functional diversity, and compatibility with various chemistries for modification and stabilization. Among the fabrication approaches for such structures, the rolling circle techniques have emerged as particularly promising, producing morphologically round, flower-shaped nucleic acid particles: typically hybrid composites of long nucleic acid strands and inorganic magnesium pyrophosphate (Mg2PPi). These constructs are known to form via anisotropic nucleic acid-driven crystallization in a sequence-independent manner, rendering monodisperse and densely packed RNA or DNA-inorganic composites. However, it still remains to fully explore how flexible polymer-like RNA or DNA strands (acting as biomolecular additives) mediate the crystallization process of Mg2PPi and affect the structure and properties of the product crystals. To address this, we closely examined nanoscale details to mesoscopic features of Mg2PPi/DNA hybrid composites fabricated by two approaches, namely rolling circle amplification (RCA)-based in situ synthesis and long synthetic DNA-mediated crystallization. Similar to the DNA constructs fabricated by RCA, the rapid crystallization of Mg2PPi was retarded on a short-range order when we precipitated the crystals in the presence of presynthesized long DNA, which resulted in effective incorporation of biomolecular additives such as DNA and enzymes. These findings further provide a more feasible way to encapsulate bioactive enzymes within DNA constructs compared to in situ RCA-mediated synthesis, i.e., by not only protecting them from possible denaturation under the reaction conditions but also preventing nonselective association of proteins arising from the RCA reaction mixtures.
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Affiliation(s)
- Eunjung Kim
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Shweta Agarwal
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Nayoung Kim
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Fredrik Sydow Hage
- SuperSTEM
Laboratory, SciTech Daresbury Campus, Daresbury WA4 4AD, United Kingdom
| | - Vincent Leonardo
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Amy Gelmi
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Molly M. Stevens
- Department
of Materials, Department of Bioengineering and Institute for Biomedical
Engineering, Imperial College London, London SW7 2AZ, United Kingdom
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28
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Gumiere T, Rousseau AN, da Costa DP, Cassetari A, Cotta SR, Andreote FD, Gumiere SJ, Pavinato PS. Phosphorus source driving the soil microbial interactions and improving sugarcane development. Sci Rep 2019; 9:4400. [PMID: 30867512 PMCID: PMC6416284 DOI: 10.1038/s41598-019-40910-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 02/25/2019] [Indexed: 02/03/2023] Open
Abstract
The world demand for phosphate has gradually increased over the last decades, currently achieving alarming levels considering available rock reserves. The use of soil microorganisms, such as arbuscular mycorrhizal fungi (AMF), has been suggested as a promising alternative to improve phosphorus-use efficiency. However, the effect of the source of phosphorus on the interactions within the soil microbial community remains unclear. Here, we evaluated the links between the total dry matter content of sugarcane and the interactions within the soil microbial community under different phosphate sources, with/without AMF inoculation. The phosphate sources were Simple Superphosphate (SS, 18% of P2O5), Catalão rock phosphate (CA, 2.93% of P2O5) and Bayovar rock phosphate (BA, 14% of P2O5). The results indicated that the BA source led to the largest total dry matter content. The phosphate source affected total dry matter and the structure of the soil microbial communities. The bacterial interactions increased across sources with high percentage of P2O5, while the fungal interactions decreased. The interactions between bacterial and fungal microorganisms allowed to identify the percentage of P2O5 resulting in the highest total sugarcane dry matter. Our findings suggested the soil microbial interactions as a potential microbial indicator helping to improve the agricultural management.
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Affiliation(s)
- Thiago Gumiere
- Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil.
| | - Alain N Rousseau
- Institut National de la Recherche Scientifique, Centre Eau Terre Environnement. 490, rue de la Couronne, Quebec City, QC, G1K 9A9, Canada
| | - Diogo Paes da Costa
- Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil
| | - Alice Cassetari
- Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil
| | - Simone Raposo Cotta
- Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil
| | - Fernando Dini Andreote
- Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil
| | - Silvio J Gumiere
- Department of Soil and Agri-Food Engineering, Laval University, 2325 Rue de l'Université, Quebec City, QC, G1V 0A6, Canada
| | - Paulo Sergio Pavinato
- Department of Soil Science, Luiz de Queiroz College of Agriculture, University of São Paulo, ESALQ/USP, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, São Paulo, Brazil
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Colle MC, Richard RP, Smith DM, Colle MJ, Loucks WI, Gray SJ, Reynolds ZD, Sutton HA, Nasados JA, Doumit ME. Dry potato extracts improve water holding capacity, shelf life, and sensory characteristics of fresh and precooked beef patties. Meat Sci 2019; 149:156-162. [PMID: 30528720 DOI: 10.1016/j.meatsci.2018.11.022] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 11/16/2018] [Accepted: 11/27/2018] [Indexed: 11/28/2022]
Abstract
The objective was to examine shelf stability, cooked product yield, and sensory characteristics of beef patties that had no binder (Control), incorporated soy flour (Textured Vegetable Protein; TVP) or one of three dry potato extracts: X-TRATOS™ (potato extract), X-TRATOS™ O (potato extract with mustard), or X-TRATOS™ W (potato extract with sodium acid pyrophosphate). In retail display patties, all binders decreased discoloration and lipid oxidation compared to Control, and X-TRATOS™ O was superior (P < 0.05) to all other treatments. Cooking yield was higher (P < 0.05) in patties containing potato extracts compared with patties containing TVP, which had higher yield than Control patties. Beef patties with potato extracts were juicier (P < 0.05) than Control and TVP patties and had higher (P < 0.05) overall acceptability than Control patties. We conclude that potato extracts are effective binders for use in fresh or precooked beef patties because they improve retail shelf life, cooked product yield, and sensory characteristics.
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Affiliation(s)
- M C Colle
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - R P Richard
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - D M Smith
- School of Food Science, Washington State University, Pullman, WA 99164, United States
| | - M J Colle
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - W I Loucks
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - S J Gray
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - Z D Reynolds
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - H A Sutton
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - J A Nasados
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States
| | - M E Doumit
- Department of Animal and Veterinary Sciences, University of Idaho, Moscow, ID 83844, United States.
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30
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Zhang D, Gao B, Zhao C, Liu H. Visualized Quantitation of Trace Nucleic Acids Based on the Coffee-Ring Effect on Colloid-Crystal Substrates. Langmuir 2019; 35:248-253. [PMID: 30512960 DOI: 10.1021/acs.langmuir.8b03609] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We report a visualized quantitative detection method for nucleic acid amplification tests based on the coffee-ring effect on colloid-crystal substrates. The solution for loop-mediated isothermal amplification (LAMP) of DNA is drop cast on a colloid-crystal surface. After complete drying, a coffee ring containing the LAMP byproduct (i.e., magnesium pyrophosphate) is formed, and it is found that the width of the coffee ring is linearly correlated to the logarithm of the original DNA concentration before the isothermal amplification. Importantly, compared with other substrates, we found that the colloid-crystal substrate is an appropriate substrate for carrying out the assay of high sensitivity. On the basis of these findings, we develop a coffee-ring-based assay for quantitative readout of trace DNA in a sample. The assay requires 0.50 μL of the sample and is completed in 5 min in a homemade chamber with constant humidity. Semiquantitative detection of trace DNA is performed using naked eyes. With the use of a smartphone, the DNA in a sample can be quantitatively detected with a limit of detection of 20 copies.
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Affiliation(s)
- Dagan Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Bingbing Gao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Chao Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
| | - Hong Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering , Southeast University , Nanjing 210096 , China
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31
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Wu J, Zhang A, Li G, Wei Y, He S, Lin Z, Shen X, Wang Q. Effect of different components of single superphosphate on organic matter degradation and maturity during pig manure composting. Sci Total Environ 2019; 646:587-594. [PMID: 30059919 DOI: 10.1016/j.scitotenv.2018.07.336] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [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: 06/08/2018] [Revised: 07/18/2018] [Accepted: 07/23/2018] [Indexed: 06/08/2023]
Abstract
Single superphosphate (SSP) as an additive could improve phosphorus availability and reduce nitrogen loss for composts, but few studies have explored the influence of SSP on the transformation of carbon fractions in composting. The aim of this work was to assess the effect of different components of SSP, including calcium dihydrogen phosphate (CDP), calcium sulfate (CS) and free acid (FA) on organic matter degradation and maturity during pig manure composting. The results showed that CDP had significantly negative effects on the duration of thermophilic phase and organic matter degradation, but lengthened the curing phase for the transformation of organic matter. FA could intensify the inhibiting effect of CDP and postpone the biodegradation process of composting, but CS could buffer the effect of CDP on the degradation of organic carbon fractions by controlling pH. The study reveals the roles of different components of SSP to the transformation of organic carbon fractions, which lays a foundation for regulating the effects of chemical additives during composting. Regulating the content of CDP in SSP or applying SSP with other chemical additives to control the biotoxicity of excess phosphate on microbial activity should be concerned for complete and efficient composting in further study.
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Affiliation(s)
- Juan Wu
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; Environmental Monitoring Station of Baotou, Inner Mongolia 014060, China
| | - Aiguo Zhang
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Guoxue Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China.
| | - Yuquan Wei
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
| | - Shengzhou He
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Zhong Lin
- Environmental Monitoring Station of Baotou, Inner Mongolia 014060, China
| | - Xiufang Shen
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
| | - Qiuju Wang
- Environmental Monitoring Station of Baotou, Inner Mongolia 014060, China
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Yan Y, Li J, Li W, Wang Y, Song W, Bi S. DNA flower-encapsulated horseradish peroxidase with enhanced biocatalytic activity synthesized by an isothermal one-pot method based on rolling circle amplification. Nanoscale 2018; 10:22456-22465. [PMID: 30478460 DOI: 10.1039/c8nr07294a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
DNA nanotechnology has been developed to construct a variety of functional two- and three-dimensional structures for versatile applications. Rolling circle amplification (RCA) has become prominent in the assembly of DNA-inorganic composites with hierarchical structures and attractive properties. Here, we demonstrate a one-pot method to directly encapsulate horseradish peroxidase (HRP) in DNA flowers (DFs) during RCA. The growing DNA strands and Mg2PPi crystals lead to the construction of porous DFs, which provide sufficient interaction sites for spontaneously incorporating HRP molecules into DFs with high loading capacity and good stability. Furthermore, in comparison with free HRP, the DNA flower-encapsulated HRP (termed HRP-DFs) demonstrate enhanced enzymatic activity, which can efficiently biocatalyze the H2O2-mediated etching of gold nanorods (AuNRs) to generate distinct color changes since the longitudinal localized surface plasmon resonance (LSPR) frequency of AuNRs is highly sensitive to the changes in the AuNR aspect ratio. Through rationally incorporating the complementary thrombin aptamer sequence into the circular template, the synthesized HRP-DF composites are readily used as amplified labels for visual and colorimetric detection of thrombin with ultrahigh sensitivity and excellent selectivity. Therefore, our proposed strategy for direct encapsulation of enzyme molecules into DNA structures shows considerable potential applications in biosensing, biocatalysis, and point-of-care diagnostics.
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Affiliation(s)
- Yongcun Yan
- College of Chemistry and Chemical Engineering, Shandong Demonstration Center for Experimental Chemistry Education, Qingdao University, Qingdao 266071, P. R. China.
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Zhou P, Wu S, Liu X, Hegazy M, Wu G, Huang X. Multifunctional and Programmable Modulated Interface Reactions on Proteinosomes. ACS Appl Mater Interfaces 2018; 10:38565-38573. [PMID: 30360104 DOI: 10.1021/acsami.8b11216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A multiresponsive microcapsule has been synthesized by incorporating photoswitchable spiropyran units and the thermoresponsive monomer N-isopropylacrylamide into membrane lumens. By using functionalized light or thermoresponsive groups, this multifunctional microcapsule can modulate programmed release and interface reactions between lipase and fluorescein diacetate, alkaline phosphatase and fluorescein diphosphate, and others. Exposing this multifunctional microcapsule in a programmed controlled way allowed us to develop schematics to understand complicated interface interactions on protocells.
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Affiliation(s)
- Pei Zhou
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, The Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , China
| | - Shuang Wu
- The First Affiliated Hospital of Zhengzhou University , 40 Daxue Road , Zhengzhou 450052 , China
| | - Xiaoman Liu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, The Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , China
| | - Mohammad Hegazy
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, The Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , China
| | - Guangyu Wu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, The Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , China
| | - Xin Huang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, The Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , China
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Nagel R, Thomas JA, Adekunle FA, Mann FM, Peters RJ. Arginine in the FARM and SARM: A Role in Chain-Length Determination for Arginine in the Aspartate-Rich Motifs of Isoprenyl Diphosphate Synthases from Mycobacterium tuberculosis. Molecules 2018; 23:molecules23102546. [PMID: 30301210 PMCID: PMC6214179 DOI: 10.3390/molecules23102546] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/02/2018] [Accepted: 10/05/2018] [Indexed: 01/20/2023] Open
Abstract
Isoprenyl chains are found in many important metabolites. These are derived from precursors of the appropriate length produced by isoprenyl diphosphate synthases (IDSs). The human pathogen Mycobacterium tuberculosis makes various isoprenoids/terpenoids, with important roles in their biosynthesis played by two closely related IDSs, encoded by grcC1 (Rv0562) and grcC2 (Rv0989c), with Rv0989c generating the 10-carbon precursor (E)-geranyl diphosphate (GPP), and Rv0562 the 20-carbon precursor (E,E,E)-geranylgeranyl diphosphate (GGPP). Intriguingly, while Rv0562 contains the prototypical trans-IDS first and second aspartate-rich (DDxxD) motifs (FARM and SARM, respectively), Rv0989c uniquely contains arginine in place of the second Asp in the FARM and first Asp in the SARM. Here site-directed mutagenesis of the corresponding residues in both Rv0562 and Rv0989c reveals that these play a role in determination of product chain length. Specifically, substitution of Asp for the Arg in the FARM and SARM of Rv0989c leads to increased production of the longer 15-carbon farnesyl diphosphate (FPP), while substitution of Arg for the corresponding Asp in Rv0562 leads to increased release of shorter products, both FPP and GPP. Accordingly, while the primary role of the FARM and SARM is known to be chelation of the divalent magnesium ion co-factors that assist substrate binding and catalysis, the Arg substitutions found in Rv0989c seem to provide a novel means by which product chain length is moderated, at least in these M. tuberculosis IDSs.
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Affiliation(s)
- Raimund Nagel
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA.
| | - Jill A Thomas
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA.
| | - Faith A Adekunle
- Department of Chemistry, University of Wisconsin-Parkside, Kenosha, WI 53141, USA.
| | - Francis M Mann
- Department of Chemistry, University of Wisconsin-Parkside, Kenosha, WI 53141, USA.
| | - Reuben J Peters
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA 50011, USA.
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Wang R, Shafi M, Ma J, Zhong B, Guo J, Hu X, Xu W, Yang Y, Ruan Z, Wang Y, Ye Z, Liu D. Effect of amendments on contaminated soil of multiple heavy metals and accumulation of heavy metals in plants. Environ Sci Pollut Res Int 2018; 25:28695-28704. [PMID: 30097985 DOI: 10.1007/s11356-018-2918-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 04/24/2018] [Accepted: 08/06/2018] [Indexed: 06/08/2023]
Abstract
The contamination of soil with heavy metals is a severe problem due to adverse impact of heavy metals on environmental safety and human health. It is essential to remediate soil contaminated with heavy metals. This study has evaluated the effects of pine biochar, kaolin, and triple super phosphate (TSP) on multiple heavy metals (Ni, Zn, Cu, and Cd) in contaminated soil and accumulation of heavy metals in plants. The amendments can reduce availability of heavy metals in soil by increasing pH, adsorption, complexation, or co-precipitation. Different amendments have variable effects on accumulation of heavy metals in plants and in soil due to its diverse mechanism of stability. The results showed that application of triple super phosphate (TSP) has significant reduced soil Cd exchangeable (EXC) fraction from 58.59 to 21.30%. Bound to carbonates (CAR) fraction decreased from 9.84 to 5.11%, and bound to Fe-Mn oxides (OX) fraction increased from 29.61 to 69.86%. The triple super phosphate (TSP) has the ability to stabilize Cu and especially Cd. However, triple super phosphate (TSP) has enhanced ecological risk of Zn and Ni. Application of pine biochar has significantly enhanced soil pH. The kaolin has significantly reduced EXC fraction of Cd and increased OX fraction of Cu. The amendments and heavy metals have not caused significant effect on SPAD value of Buxus microphylla Siebold & Zucc (B. microphylla). The triple super phosphate (TSP) has significant decreased biomass of B. microphylla and bamboo-williow (Salix sp.) by 24.91 and 57.43%, respectively. Pine biochar and kaolin have increased the accumulation of Zn and Cd in plants. It is concluded that triple super phosphate (TSP) was effective in remediation of Cd and kaolin was effective in remediation of Cd and Cu. Pine biochar was effective in remediation of Cd, Cu, and Zn.
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Affiliation(s)
- Renyuan Wang
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Mohammad Shafi
- Department of Agronomy, The University of Agriculture, Peshawar, Pakistan
| | - Jiawei Ma
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Bin Zhong
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Jia Guo
- Zhejiang Chengbang Landscape Co., Ltd, Hangzhou, 311300, People's Republic of China
| | - Xiaowei Hu
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Weijie Xu
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Yun Yang
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Zhongqiang Ruan
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Ying Wang
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Zhengqian Ye
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China
| | - Dan Liu
- State Key Laboratory of Subtropical Silviculture, Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A & F University, Hangzhou, Zhejiang, 311300, People's Republic of China.
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Abstract
Magnetic isolation using magnetic nanoparticles (MNPs) as trapping probes have been widely used in sample pretreatment to shorten analysis time. Nevertheless, to generate MNPs is time-consuming. Furthermore, the generated MNPs have to be further functionalized to gain the capability of recognizing their target species. Thus, an alternative approach that can impose magnetism to nonmagnetic species by simply using magnetic ions as the probes is developed in this study. That is, we employ magnetic ions (Fe3+, Co2+, and Ni2+) that can interact with nonmagnetic species containing oxygen-containing functional groups as the probes. Pyrophosphate (PPi), bacteria, and mammalian cells were selected as the model samples. Our results show that the as-prepared magnetic ion-PPi conjugates gain sufficient magnetism and can be readily aggregated by applying an external magnetic field. Moreover, the magnetic trapping is reversible. The PPi-containing conjugates can lose their magnetic property simply using ethylenediaminetetraacetic acid or aluminum ions as competing agents to remove or to replace, respectively, the conjugated magnetic ions. In addition, bacteria and mammalian cells that possess abundant oxygen-containing functional groups on their cell surfaces can be selectively probed by magnetic ions and gain sufficient magnetism for magnetic isolation from complex serum samples.
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Affiliation(s)
- Jia-Lin Wei
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 300 , Taiwan
| | - Yu-Chie Chen
- Department of Applied Chemistry , National Chiao Tung University , Hsinchu 300 , Taiwan
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Guan D, Chen F, Liu J, Li J, Lan L, Huang W. Design and Synthesis of Pyrophosphate-Targeting Vancomycin Derivatives for Combating Vancomycin-Resistant Enterococci. ChemMedChem 2018; 13:1644-1657. [PMID: 29920964 DOI: 10.1002/cmdc.201800252] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/13/2018] [Indexed: 12/12/2022]
Abstract
As the last resort for intractable Gram-positive bacterial infections, vancomycin is losing efficacy with the emergence of vancomycin-resistant bacteria, especially vancomycin-resistant Enterococci (VRE). To combat this threat, we rationally designed and synthesized 39 novel vancomycin derivatives by respective or combined modifications using metal-chelating, lipophilic, and galactose-attachment strategies for extensive structure-activity relationship (SAR) analysis. In a proposed mechanism, the conjugation of dipicolylamine on the seventh amino acid resorcinol position or C-terminus endowed the vancomycin backbone with binding capacity for the pyrophosphate moiety in lipid II while maintaining the intrinsic binding affinity for the dipeptide terminus of the bacterial cell wall peptidoglycan precursor. The in vitro antibacterial activities were evaluated, and the optimal compounds indicated 16- to 1024-fold higher activity against VRE than that of vancomycin. Compound 11 b (3',5'-bis(dipicolylaminomethyl)tyrosine [1,2,3]triazolylmethoxylethyoxyl ethylaminomethyl-N-decylvancomycin) was found to have particularly potent activity against VRE through synergistic effects brought about by combining two peripheral modifications.
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Affiliation(s)
- Dongliang Guan
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P.R. China
| | - Feifei Chen
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
| | - Junjie Liu
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
- Department of Chemistry, Nanchang University, 999 Xuefu Avenue, Nanchang, 330031, P.R. China
| | - Jian Li
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P.R. China
| | - Lefu Lan
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P.R. China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, P.R. China
| | - Wei Huang
- CAS Key Laboratory of Receptor Research, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai, 201203, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, P.R. China
- Center for Biotherapeutics Discovery Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, P.R. China
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Melnikova NB, Malygina DS, Klabukova IN, Belov DV, Vasin VA, Petrov PS, Knyazev AV, Markin AV. Betulin-3,28-diphosphate. Physico-Chemical Properties and In Vitro Biological Activity Experiments. Molecules 2018; 23:E1175. [PMID: 29757999 PMCID: PMC6099732 DOI: 10.3390/molecules23051175] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 05/10/2018] [Accepted: 05/11/2018] [Indexed: 11/16/2022] Open
Abstract
Betulin-3,28-diphosphate (BDP) obtained by phosphorylation of betulin using POCl₃ has two main structural forms-BDP-1 and BDP-2-which differ in ethanol solubility, melting point, FTIR spectra, thermoanalytical characteristics and biological activity. Betulin-3,28-diphosphate and its sodium salt (Na-BDP) were characterized using 13C and 31P-NMR spectra, powder XRD experiments, as well as differential scanning calorimetry (DSC) and thermogravimetric analysis (TG) methods. The exo-effects at 193 ± 8 °C for ethanol soluble BDP-1 samples (-19.7 ± 0.2 kJ∙mol-1) were about three times less than for ethanol insoluble BDP-2 samples f (-70.5 ± 0.7 kJ∙mol-1). The DSC curves of Na-BDP-1 and Na-BDP-2 characterized the endo-effects having a maximum at 95⁻112 °C. Water-soluble Na-BDP-1 was obtained as needle-like crystals, unlike poorly crystalline Na-BDP-2, whereas BDP-1 and BDP-2 aged with time and were isolated as amorphous substances. In vitro experiments on rats showed that compared to the control, Na-BDP-1 increased catalase and SOD activity and improved energy metabolism more effectively than Na-BDP-2.
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Affiliation(s)
- Nina B Melnikova
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Darina S Malygina
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Irina N Klabukova
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Denis V Belov
- Department of Pharmaceutical Chemistry, Privolzhsky Research Medical University, Minin sq., 10/1, 603950 Nizhny Novgorod, Russia.
| | - Viktor A Vasin
- Department of Chemistry, N.P. Ogarev Mordovian State University, Bolshevistskaya St. 68, 430005 Saransk, Russia.
| | - Pavel S Petrov
- Department of Chemistry, N.P. Ogarev Mordovian State University, Bolshevistskaya St. 68, 430005 Saransk, Russia.
| | - Alexander V Knyazev
- Department of Chemistry, Lobachevsky University, 23/5 Gagarin Av., 603950 Nizhny Novgorod, Russia.
| | - Alexey V Markin
- Department of Chemistry, Lobachevsky University, 23/5 Gagarin Av., 603950 Nizhny Novgorod, Russia.
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Carreira-Barral I, Fernández-Pérez I, Mato-Iglesias M, de Blas A, Platas-Iglesias C, Esteban-Gómez D. Recognition of AMP, ADP and ATP through Cooperative Binding by Cu(II) and Zn(II) Complexes Containing Urea and/or Phenylboronic-Acid Moieties. Molecules 2018; 23:molecules23020479. [PMID: 29470445 PMCID: PMC6017333 DOI: 10.3390/molecules23020479] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/16/2018] [Accepted: 02/20/2018] [Indexed: 12/16/2022] Open
Abstract
We report a series of Cu(II) and Zn(II) complexes with different ligands containing a dipicolyl unit functionalized with urea groups that may contain or not a phenylboronic acid function. These complexes were designed for the recognition of phosphorylated anions through coordination to the metal ion reinforced by hydrogen bonds involving the anion and NH groups of urea. The complexes were isolated and several adducts with pyrophosphate were characterized using X-ray diffraction measurements. Coordination of one of the urea nitrogen atoms to the metal ion promoted the hydrolysis of the ligands containing 1,3-diphenylurea units, while ligands bearing 1-ethyl-3-phenylurea groups did not hydrolyze significantly at room temperature. Spectrophotometric titrations, combined with 1H and 31P NMR studies, were used in investigating the binding of phosphate, pyrophosphate (PPi), and nucleoside 5′-polyphosphates (AMP, ADP, ATP, CMP, and UMP). The association constants determined in aqueous solution (pH 7.0, 0.1 M MOPS) point to a stronger association with PPi, ADP, and ATP as compared with the anions containing a single phosphate unit. The [CuL4]2+ complex shows important selectivity for pyrophosphate (PPi) over ADP and ATP.
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Affiliation(s)
- Israel Carreira-Barral
- Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA), 15071 A Coruña, Galicia, Spain.
- Departamento de Química, Facultad de Ciencias, Universidad de Burgos, 09001 Burgos, Spain.
| | - Isabel Fernández-Pérez
- Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA), 15071 A Coruña, Galicia, Spain.
| | - Marta Mato-Iglesias
- Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA), 15071 A Coruña, Galicia, Spain.
| | - Andrés de Blas
- Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA), 15071 A Coruña, Galicia, Spain.
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA), 15071 A Coruña, Galicia, Spain.
| | - David Esteban-Gómez
- Departamento de Química, Facultade de Ciencias, Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA), 15071 A Coruña, Galicia, Spain.
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Sato H, Narita K, Minami A, Yamazaki M, Wang C, Suemune H, Nagano S, Tomita T, Oikawa H, Uchiyama M. Theoretical Study of Sesterfisherol Biosynthesis: Computational Prediction of Key Amino Acid Residue in Terpene Synthase. Sci Rep 2018; 8:2473. [PMID: 29410538 PMCID: PMC5802712 DOI: 10.1038/s41598-018-20916-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/17/2018] [Indexed: 01/07/2023] Open
Abstract
The cyclization mechanisms involved in the biosynthesis of sesterterpenes are not fully understood. For example, there are two plausible reaction pathways for sesterfisherol biosynthesis, which differ in the order of ring cyclization: A-D-B/C (Path a) and A-B-C/D (Path b). It is difficult to capture intermediates of terpene cyclization, which is a complex, domino-type reaction, and so here we employed a combination of experimental and computational methods. Density functional theory calculations revealed unexpected intermediates and transition states, and implied that C-H···π interaction between a carbocation intermediate and an aromatic residue of sesterfisherol synthase (NfSS) plays a critical role, serving to accelerate the 1,2-H shift (thereby preventing triquinane carbocation formation) and to protect reactive carbocation intermediates from bases such as pyrophosphate or water in the active site. Site-directed mutagenesis of NfSS guided by docking simulations confirmed that phenylalanine F191 is a critical amino acid residue for sesterfisherol synthase, as the F191A mutant of NfSS produces novel sesterterpenes, but not sesterfisherol. Although both pathways are energetically viable, on the basis of our computational and experimental results, NfSS-mediated sesterfisherol biosynthesis appears to proceed via Path a. These findings may also provide new insight into the cyclization mechanisms in related sesterterpene synthases.
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Affiliation(s)
- Hajime Sato
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
- Elements Chemistry Laboratory, RIKEN, and RIKEN Center for Sustainable Resource Science (Wako campus), 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan.
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan.
| | - Koji Narita
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Atsushi Minami
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Mami Yamazaki
- Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8675, Japan
| | - Chao Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
- Elements Chemistry Laboratory, RIKEN, and RIKEN Center for Sustainable Resource Science (Wako campus), 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan
| | - Hironori Suemune
- Department of Engineering, Graduate School of Sustainability Science, Tottori University, Tottori, 680-8552, Japan
| | - Shingo Nagano
- Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University, Tottori, 680-8552, Japan
| | - Takeo Tomita
- Biotechnology Research Center, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan
| | - Hideaki Oikawa
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
- Elements Chemistry Laboratory, RIKEN, and RIKEN Center for Sustainable Resource Science (Wako campus), 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan.
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Abstract
In this review, our recent advances in the development of nucleoside di- and nucleoside triphosphate prodrugs is summarized. Previously, we had developed a successful membrane-permeable pronucleotide system for the intracellular delivery of nucleoside monophosphates as well, the so-called cycloSal-approach. In contrast to that work in which the delivery is initiated by a chemically driven hydrolysis reaction, for the di- and triphosphate delivery, an enzymatic trigger mechanism involving (carboxy)esterases had to be used. The other features of the new pronucleotide approaches are: (i) lipophilic modification was restricted to the terminal phosphate group leaving charges at the internal phosphate moieties and (ii) appropriate lipophilicity is introduced by long aliphatic residues within the bipartite prodrug moiety. The conceptional design of the di- and triphosphate prodrug systems will be described and the chemical synthesis, the hydrolysis properties, a structure-activity relationship and antiviral activity data will be discussed as well. The advantage of these new approaches is that all phosphorylation steps from the nucleoside analogue into the bioactive nucleoside triphosphate form can be bypassed in the case of the triphosphate prodrugs. Moreover, enzymatic processes like the deamination of nucleosides or nucleoside monophosphates which lead to catabolic clearance of the potential antivirally active compound can be avoided by the delivery of the higher phosphorylated nucleotides.
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Affiliation(s)
- Chris Meier
- Organic Chemistry, Department of Chemistry, Faculty of Sciences, Universität Hamburg, Hamburg, Germany
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Fischbacher A, von Sonntag C, Schmidt TC. Hydroxyl radical yields in the Fenton process under various pH, ligand concentrations and hydrogen peroxide/Fe(II) ratios. Chemosphere 2017; 182:738-744. [PMID: 28531840 DOI: 10.1016/j.chemosphere.2017.05.039] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [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: 12/24/2016] [Revised: 02/15/2017] [Accepted: 05/06/2017] [Indexed: 06/07/2023]
Abstract
The Fenton process, one of several advanced oxidation processes, describes the reaction of Fe(II) with hydrogen peroxide. Fe(II) is oxidized to Fe(III) that reacts with hydrogen peroxide to Fe(II) and again initiates the Fenton reaction. In the course of the reactions reactive species, e.g. hydroxyl radicals, are formed. Conditions such as pH, ligand concentrations and the hydrogen peroxide/Fe(II) ratio may influence the OH radical yield. It could be shown that at pH < 2.7 and >3.5 the OH radical yield decreases significantly. Two ligands were investigated, pyrophosphate and sulfate. It was found that pyrophosphate forms a complex with Fe(III) that does not react with hydrogen peroxide and thus, the Fenton reaction is terminated and the OH radical yields do not further increase. The influence of sulfate is not as strong as that of pyrophosphate. The OH radical yield is decreased when sulfate is added but even at higher concentrations the Fenton reaction is not terminated.
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Affiliation(s)
- Alexandra Fischbacher
- Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany
| | - Clemens von Sonntag
- Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany; Max-Planck-Institut für Bioanorganische Chemie, Stiftstr. 34-36, 45413 Mülheim an der Ruhr, Germany
| | - Torsten C Schmidt
- Instrumental Analytical Chemistry, University of Duisburg-Essen, Universitätsstraße 5, 45141 Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstraße 2, 45141 Essen, Germany.
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Qin A, Fu LT, Wong JKF, Chau LY, Yip SP, Lee TMH. Precipitation of PEG/Carboxyl-Modified Gold Nanoparticles with Magnesium Pyrophosphate: A New Platform for Real-Time Monitoring of Loop-Mediated Isothermal Amplification. ACS Appl Mater Interfaces 2017; 9:10472-10480. [PMID: 28276674 DOI: 10.1021/acsami.7b00046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Gold nanoparticles have proven to be promising for decentralized nucleic acid testing by virtue of their simple visual readout and absorbance-based quantification. A major challenge toward their practical application is to achieve ultrasensitive detection without compromising simplicity. The conventional strategy of thermocycling amplification is unfavorable (because of both instrumentation and preparation of thermostable oligonucleotide-modified gold nanoparticle probes). Herein, on the basis of a previously unreported co-precipitation phenomenon between thiolated poly(ethylene glycol)/11-mercaptoundecanoic acid co-modified gold nanoparticles and magnesium pyrophosphate crystals (an isothermal DNA amplification reaction byproduct), a new ultrasensitive and simple DNA assay platform is developed. The binding mechanism underlying the co-precipitation phenomenon is found to be caused by the complexation of carboxyl and pyrophosphate with free magnesium ions. Remarkably, poly(ethylene glycol) does not hinder the binding and effectively stabilizes gold nanoparticles against magnesium ion-induced aggregation (without pyrophosphate). In fact, a similar phenomenon is observed in other poly(ethylene glycol)- and carboxyl-containing nanomaterials. When the gold nanoparticle probe is incorporated into a loop-mediated isothermal amplification reaction, it remains as a red dispersion for a negative sample (in the absence of a target DNA sequence) but appears as a red precipitate for a positive sample (in the presence of a target). This results in a first-of-its-kind gold nanoparticle-based DNA assay platform with isothermal amplification and real-time monitoring capabilities.
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Affiliation(s)
- Ailin Qin
- Interdisciplinary Division of Biomedical Engineering, ‡Department of Health Technology and Informatics, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong, China
| | - Lok Tin Fu
- Interdisciplinary Division of Biomedical Engineering, ‡Department of Health Technology and Informatics, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong, China
| | - Jacky K F Wong
- Interdisciplinary Division of Biomedical Engineering, ‡Department of Health Technology and Informatics, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong, China
| | - Li Yin Chau
- Interdisciplinary Division of Biomedical Engineering, ‡Department of Health Technology and Informatics, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong, China
| | - Shea Ping Yip
- Interdisciplinary Division of Biomedical Engineering, ‡Department of Health Technology and Informatics, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong, China
| | - Thomas M H Lee
- Interdisciplinary Division of Biomedical Engineering, ‡Department of Health Technology and Informatics, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong, China
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Duan X, Chan C, Guo N, Han W, Weichselbaum RR, Lin W. Photodynamic Therapy Mediated by Nontoxic Core-Shell Nanoparticles Synergizes with Immune Checkpoint Blockade To Elicit Antitumor Immunity and Antimetastatic Effect on Breast Cancer. J Am Chem Soc 2016; 138:16686-16695. [PMID: 27976881 PMCID: PMC5667903 DOI: 10.1021/jacs.6b09538] [Citation(s) in RCA: 313] [Impact Index Per Article: 39.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An effective, nontoxic, tumor-specific immunotherapy is the ultimate goal in the battle against cancer, especially the metastatic disease. Checkpoint blockade-based immunotherapies have been shown to be extraordinarily effective but benefit only the minority of patients whose tumors have been pre-infiltrated by T cells. Here, we show that Zn-pyrophosphate (ZnP) nanoparticles loaded with the photosensitizer pyrolipid (ZnP@pyro) can kill tumor cells upon irradiation with light directly by inducing apoptosis and/or necrosis and indirectly by disrupting tumor vasculature and increasing tumor immunogenicity. Furthermore, immunogenic ZnP@pyro photodynamic therapy (PDT) treatment sensitizes tumors to checkpoint inhibition mediated by a PD-L1 antibody, not only eradicating the primary 4T1 breast tumor but also significantly preventing metastasis to the lung. The abscopal effects on both 4T1 and TUBO bilateral syngeneic mouse models further demonstrate that ZnP@pyro PDT treatment combined with anti-PD-L1 results in the eradication of light-irradiated primary tumors and the complete inhibition of untreated distant tumors by generating a systemic tumor-specific cytotoxic T cell response. These findings indicate that nanoparticle-mediated PDT can potentiate the systemic efficacy of checkpoint blockade immunotherapies by activating the innate and adaptive immune systems in tumor microenvironment.
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Affiliation(s)
- Xiaopin Duan
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Christina Chan
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Nining Guo
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
- Department of Radiation and Cellular Oncology and The Ludwig Center for Metastasis Research, The University of Chicago, 5758 South Maryland Avenue, Chicago, Illinois 60637, United States
| | - Wenbo Han
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Ralph R. Weichselbaum
- Department of Radiation and Cellular Oncology and The Ludwig Center for Metastasis Research, The University of Chicago, 5758 South Maryland Avenue, Chicago, Illinois 60637, United States
| | - Wenbin Lin
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
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Rizwan MS, Imtiaz M, Huang G, Chhajro MA, Liu Y, Fu Q, Zhu J, Ashraf M, Zafar M, Bashir S, Hu H. Immobilization of Pb and Cu in polluted soil by superphosphate, multi-walled carbon nanotube, rice straw and its derived biochar. Environ Sci Pollut Res Int 2016; 23:15532-15543. [PMID: 27121017 DOI: 10.1007/s11356-016-6695-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 12/07/2015] [Accepted: 04/12/2016] [Indexed: 06/05/2023]
Abstract
Lead (Pb) and copper (Cu) contamination in croplands pose severe health hazards and environmental concerns throughout soil-food chain transfer. In the present study, BCR, TCLP, CaCl2, and SBET techniques were employed to evaluate the simultaneous effectiveness of rice straw (RS) and its derived biochar (BC), multiwall carbon nanotube (MWCNT), and single superphosphate (SSP) to immobilize the Pb and Cu in co-contaminated soil. The BCR sequential extraction results suggested that with increasing BC and SSP amount, the acid-soluble fractions decreased while oxidizable and residual proportions of Pb and Cu were increased significantly. Compared to SSP, the application of BC amendment substantially modified partitioning of Cu from easily exchangeable phase to less bioavailable residual bound fraction. The immobilized Pb and Cu were mainly transformed to reducible forms. The TCLP and CaCl2-extracted Pb and Cu were reduced significantly by the addition of BC compared to RS and MWCNT, whereas the bio-accessibility of Pb significantly reduced with RS addition. SSP showed better results for Pb immobilization while marginal for Cu in co-contaminated soil. Overall, the addition of BC offered the best results and could be effective in both Pb and Cu immobilization thereby reducing their mobility and bioavailability in the co-contaminated soil.
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Affiliation(s)
- Muhammad Shahid Rizwan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Muhammad Imtiaz
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Guoyong Huang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Muhammad Afzal Chhajro
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Yonghong Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Qingling Fu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Jun Zhu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Muhammad Ashraf
- University College of Agriculture, University of Sargodha, University road, Sargodha, Punjab, 40100, Pakistan
| | - Mohsin Zafar
- Soil & Water Chemistry Lab. Department of Soil Science, Federal University of Santa Maria, 91105-900, Rio Grande do Sul, Brazil
| | - Saqib Bashir
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China
| | - Hongqing Hu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, No. 1 Shizishan Street, Hongshan District, Wuhan, Hubei, 430070, P. R. China.
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Chao D, Ni S. Nanomolar pyrophosphate detection and nucleus staining in living cells with simple terpyridine-Zn(II) complexes. Sci Rep 2016; 6:26477. [PMID: 27198968 PMCID: PMC4873787 DOI: 10.1038/srep26477] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 05/04/2016] [Indexed: 02/06/2023] Open
Abstract
Great efforts have been made to develop fluorescent probes for pyrophosphate (PPi) detection. Nucleus staining with fluorescence microscopy has been also widely investigated. But fluorescent probes for PPi detection with high sensitivity in water medium and nucleus staining with low-cost non-precious metal complexes in living cells are still challenging. Herein, we report simple terpyridine-Zn(II) complexes for selective nanomolar PPi detection over ATP and ADP in water based on aggregation induced emission (AIE) and intramolecular charge transfer (ICT). In addition, these terpyridine-Zn(II) complexes were successfully employed for nucleus staining in living cells. These results demonstrated simply obtained terpyridine-Zn(II) complexes are powerful tool for PPi detection and the development of PPi-related studies.
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Affiliation(s)
- Duobin Chao
- School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin, Liaoning 124221, P. R. China
| | - Shitan Ni
- School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin, Liaoning 124221, P. R. China
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Shen QW, Swartz DR, Wang Z, Liu Y, Gao Y, Zhang D. Different actions of salt and pyrophosphate on protein extraction from myofibrils reveal the mechanism controlling myosin dissociation. J Sci Food Agric 2016; 96:2033-2039. [PMID: 26085314 DOI: 10.1002/jsfa.7314] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 03/20/2015] [Revised: 05/11/2015] [Accepted: 06/13/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Myosin is the major functional protein in muscle foods for water retention, protein binding/gelation and fat holding/emulsification. To maximize its functionality, myosin needs to be released from thick filaments. Understanding of the mechanism controlling myosin extraction will help improve quality traits of meat products. RESULTS The data obtained show that actomyosin binding is the rate-limiting constraint for myosin release in rigor condition. Magnesium pyrophosphate (MgPPi) increased myosin extraction by weakening actomyosin interaction and maximized myosin extraction at 0.4 mol L(-1) NaCl, which was not attained at 1.0 mol L(-1) NaCl in the absence of PPi. Interaction between myosin rod domains is another critical constraint for myosin extraction, which is, rather than PPi, salt dependent. Further, our data suggest that MyBP-C (myosin binding protein C) and M-line might not be of significance in the process of NaCl-induced myosin extraction, though further study was needed. CONCLUSION Our study provides new insight into the mechanism that controls myosin extraction from intact sarcomere, which could be applied to maximize myosin function and to improve meat quality in practice.
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Affiliation(s)
- Qingwu W Shen
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, 100193, China
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | | | - Zhenyu Wang
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | - Yue Liu
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | - Yuan Gao
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
| | - Dequan Zhang
- College of Food Science and Technology, Hunan Agricultural University, Hunan, China
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Ali M, Ahmed I, Ramirez P, Nasir S, Niemeyer CM, Mafe S, Ensinger W. Label-Free Pyrophosphate Recognition with Functionalized Asymmetric Nanopores. Small 2016; 12:2014-2021. [PMID: 26939057 DOI: 10.1002/smll.201600160] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 01/18/2016] [Revised: 01/29/2016] [Indexed: 06/05/2023]
Abstract
The label-free detection of pyrophosphate (PPi) anions with a nanofluidic sensing device based on asymmetric nanopores is demonstrated. The pore surface is functionalized with zinc complexes based on two di(2-picolyl)amine [bis(DPA)] moieties using carbodiimide coupling chemistry. The complexation of zinc (Zn(2+) ) ion is achieved by exposing the modified pore to a solution of zinc chloride to form bis(Zn(2+) -DPA) complexes. The chemical functionalization is demonstrated by recording the changes in the observed current-voltage (I-V) curves before and after pore modification. The bis(Zn(2+) -DPA) complexes on the pore walls serve as recognition sites for pyrophosphate anion. The experimental results show that the proposed nanofluidic sensor has the ability to sense picomolar concentrations of PPi anion in the surrounding environment. On the contrary, it does not respond to other phosphate anions, including monohydrogen phosphate, dihydrogen phosphate, adenosine monophosphate, adenosine diphosphate, and adenosine triphosphate. The experimental results are described theoretically by using a model based on the Poisson-Nernst-Planck equations.
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Affiliation(s)
- Mubarak Ali
- Department of Material- and Geo-Sciences, Materials Analysis, Technische Universität Darmstadt, D-64287, Darmstadt, Germany
- Materials Research Department, GSI Helmholtzzentrum für Schwerionenforschung, D-64291, Darmstadt, Germany
| | - Ishtiaq Ahmed
- Karlsruhe Institute of Technology (KIT), Institute for Biological Interfaces (IBG-1), D-76344, Eggenstein-Leopoldshafen, Germany
| | - Patricio Ramirez
- Departamento de Física Aplicada, Universitat Politécnica de València, E-46022, Valencia, Spain
| | - Saima Nasir
- Department of Material- and Geo-Sciences, Materials Analysis, Technische Universität Darmstadt, D-64287, Darmstadt, Germany
- Materials Research Department, GSI Helmholtzzentrum für Schwerionenforschung, D-64291, Darmstadt, Germany
| | - Christof M Niemeyer
- Karlsruhe Institute of Technology (KIT), Institute for Biological Interfaces (IBG-1), D-76344, Eggenstein-Leopoldshafen, Germany
| | - Salvador Mafe
- Departamento de Física de la Terra i Termodinàmica, Universitat de València, E-46100, Burjassot, Spain
| | - Wolfgang Ensinger
- Department of Material- and Geo-Sciences, Materials Analysis, Technische Universität Darmstadt, D-64287, Darmstadt, Germany
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Zhu G, Liu Y, Yang X, Kim YH, Zhang H, Jia R, Liao HS, Jin A, Lin J, Aronova M, Leapman R, Nie Z, Niu G, Chen X. DNA-inorganic hybrid nanovaccine for cancer immunotherapy. Nanoscale 2016; 8:6684-92. [PMID: 26947116 PMCID: PMC4807396 DOI: 10.1039/c5nr08821f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Cancer evolves to evade or compromise the surveillance of the immune system, and cancer immunotherapy aims to harness the immune system in order to inhibit cancer development. Unmethylated CpG dinucleotide-containing oligonucleotides (CpG), a class of potent adjuvants that activate the toll-like receptor 9 (TLR9) located in the endolysosome of many antigen-presenting cells (APCs), are promising for cancer immunotherapy. However, clinical application of synthetic CpG confronts many challenges such as suboptimal delivery into APCs, unfavorable pharmacokinetics caused by limited biostability and short in vivo half-life, and side effects associated with leaking of CpG into the systemic circulation. Here we present DNA-inorganic hybrid nanovaccines (hNVs) for efficient uptake into APCs, prolonged tumor retention, and potent immunostimulation and cancer immunotherapy. hNVs were self-assembled from concatemer CpG analogs and magnesium pyrophosphate (Mg2PPi). Mg2PPi renders hNVs resistant to nuclease degradation and thermal denaturation, both of which are demanding characteristics for effective vaccination and the storage and transportation of vaccines. Fluorophore-labeled hNVs were tracked to be efficiently internalized into the endolysosomes of APCs, where Mg2PPi was dissolved in an acidic environment and thus CpG analogs were exposed to hNVs. Internalized hNVs in APCs led to (1) elevated secretion of proinflammatory factors, and (2) elevated expression of co-stimulatory factors. Compared with molecular CpG, hNVs dramatically prolonged the tissue retention of CpG analogs and reduced splenomegaly, a common side effect of CpG. In a melanoma mouse model, two injections of hNVs significantly inhibited the tumor growth and outperformed the molecular CpG. These results suggest hNVs are promising for cancer immunotherapy.
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Affiliation(s)
- Guizhi Zhu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| | - Yijing Liu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| | - Xiangyu Yang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| | - Young-Hwa Kim
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| | - Huimin Zhang
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| | - Rui Jia
- Section on Intracellular Protein Trafficking, Cell Biology and Metabolism Program, National Institute of Child Health and Human Development, NIH, Bethesda, MD 20892, USA
| | - Hsien-Shun Liao
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD 20892, USA
| | - Albert Jin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD 20892, USA
| | - Jing Lin
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD 20892, USA
| | - Maria Aronova
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD 20892, USA
| | - Richard Leapman
- Laboratory of Cellular Imaging and Macromolecular Biophysics, NIBIB, NIH, Bethesda, MD 20892, USA
| | - Zhihong Nie
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
| | - Gang Niu
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, MD 20892, USA.
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Gao Y, Yue Q, Gao B. Insights into properties of activated carbons prepared from different raw precursors by pyrophosphoric acid activation. J Environ Sci (China) 2016; 41:235-243. [PMID: 26969070 DOI: 10.1016/j.jes.2015.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 05/14/2015] [Accepted: 05/20/2015] [Indexed: 06/05/2023]
Abstract
Low-cost activated carbons (ACs) were prepared from four kinds of solid wastes: petroleum coke, Enteromorpha prolifera, lignin from papermaking black liquid and hair, by pyrophosphoric acid (H4P2O7) activation. Thermo-gravimetric analysis of the pyrolysis of H4P2O7-precursor mixtures implied that H4P2O7 had different influences on the pyrolysis behavior of the four raw materials. N2 adsorption/desorption isotherms, scanning electron microscopy, Fourier transform infrared spectroscopy and adsorption capacities for dyes were used to characterize the prepared activated carbons. AC derived from E. prolifera exhibited the highest surface area (1094m(2)/g) and maximum monolayer adsorption capacity for malachite green (1250mg/g). Kinetic studies showed that the experimental data were in agreement with the pseudo-second-order model. The adsorption isotherms were well described by the Langmuir isotherm model, indicating the adsorption of dye onto the ACs proceeded by monolayers.
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Affiliation(s)
- Yuan Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Qinyan Yue
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
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