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T A AR, Rajendra TN, Suhas KP, Ippagunta SK, Chaudhary S. 1,2,4,5-Tetraoxane derivatives/hybrids as potent antimalarial endo peroxides: Chronological advancements, structure-activity relationship (SAR) studies and future perspectives. Med Res Rev 2024. [PMID: 38618882 DOI: 10.1002/med.22040] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 02/24/2024] [Accepted: 03/30/2024] [Indexed: 04/16/2024]
Abstract
Malaria is a life-threatening disease that affects tropical and subtropical regions worldwide. Various drugs were used to treat malaria, including artemisinin and derivatives, antibiotics (tetracycline, doxycycline), quinolines (chloroquine, amodiaquine), and folate antagonists (sulfadoxine and pyrimethamine). Since the malarial parasites developed drug resistance, there is a need to develop new chemical entities with high efficacy and low toxicity. In this context, 1,2,4,5-tetraoxanes emerged as an essential scaffold and have shown promising antimalarial activity. To improve activity and overcome resistance to various antimalarial drugs; 1,2,4,5-tetraoxanes were fused with various aryl/heteroaryl/alicyclic/spiro moieties (steroid-based 1,2,4,5-tetraoxanes, triazine-based 1,2,4,5-tetraoxanes, aminoquinoline-based 1,2,4,5-tetraoxanes, dispiro-based 1,2,4,5-tetraoxanes, piperidine-based 1,2,4,5-tetraoxanes and diaryl-based 1,2,4,5-tetraoxanes). The present review aims to focus on covering the relevant literature published during the past 30 years (1992-2022). We summarize the most significant in vitro, in vivo results and structure-activity relationship studies of 1,2,4,5-tetraoxane-based hybrids as antimalarial agents. The structural evolution of different hybrids can provide the framework for the future development of 1,2,4,5-tetraoxane-based hybrids to treat malaria.
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Affiliation(s)
- Abdul Rahaman T A
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
| | - Thakar Neha Rajendra
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
| | - Kshirsagar Prasad Suhas
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
| | - Sirish K Ippagunta
- Department of Biotechnology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sandeep Chaudhary
- Department of Medicinal Chemistry, Laboratory of Bioactive Heterocycles and Catalysis (BHC lab), National Institute of Pharmaceutical Education and Research-Raebareli (Transit Campus), Lucknow, India
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2
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Basile G, De Luca L, Calabrese M, Lambiase G, Pizzolongo F, Romano R. The Lipidic and Volatile Components of Coffee Pods and Capsules Packaged in an Alternative Multilayer Film. Foods 2024; 13:759. [PMID: 38472871 DOI: 10.3390/foods13050759] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/23/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
Coffee pods and capsules require packaging that guarantees the optimal coffee preservation. The chemical composition of coffee can undergo quality decay phenomena during storage, especially in terms of lipidic and volatile components. Amongst coffee packaging, aluminum multilayer materials are particularly widely diffused. However, aluminum is a negative component because it is not recoverable in a mixed plastic structure and its specific weight gives significant weight to packaging. In this study, a multilayer film with a reduced content of aluminum was used to package coffe pods and capsules and compared to a standard film with an aluminum layer. Their influence on the peroxides and volatile organic compounds of two coffee blends, 100% Coffea arabica L., 50% Coffea arabica L., and 50% Coffea canephora var. robusta L., were studied during their 180-day shelf life. The predominant volatile organic compounds detected belonged to the class of furans and pyrazines. Both packaging materials used for both coffee blends in the pods and capsules showed no significant differences during storage. Thus, the alternative packaging with less aluminum had the same performance as the standard with the advantage of being more sustainable, reducing the packaging weight, with benefits for transportation, and preserving the coffee aroma during the shelf life.
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Affiliation(s)
- Giulia Basile
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Napoli, Italy
| | - Lucia De Luca
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Napoli, Italy
| | - Martina Calabrese
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Napoli, Italy
| | | | - Fabiana Pizzolongo
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Napoli, Italy
| | - Raffaele Romano
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, Portici, 80055 Napoli, Italy
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Qin Y, Perraud V, Finlayson-Pitts BJ, Wingen LM. Peroxides on the Surface of Organic Aerosol Particles Using Matrix-Assisted Ionization in Vacuum (MAIV) Mass Spectrometry. Environ Sci Technol 2023; 57:14260-14268. [PMID: 37695633 PMCID: PMC10537442 DOI: 10.1021/acs.est.3c02895] [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] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 08/27/2023] [Accepted: 08/28/2023] [Indexed: 09/12/2023]
Abstract
Organic peroxides are key intermediates in the atmosphere but are challenging to detect, especially in the particle phase, due to their instability, which has led to substantial gaps in the understanding of their environmental effects. We demonstrate that matrix-assisted ionization in vacuum (MAIV) mass spectrometry (MS), which does not require an ionization source, enables in situ characterization of peroxides and other products in the surface layers of organic particles. Hydroxyl radical oxidation of glutaric acid particles yields hydroperoxides and organic peroxides, which were detected with signals of the same order of magnitude as the major, more stable products. Product identification is supported by MS/MS analysis, peroxide standards, and offline high-resolution MS. The peroxide signals relative to the stable carbonyl and alcohol products are significantly larger using MAIV compared to those in the offline bulk analysis. This is also the case for analysis using fast, online easy ambient sonic-spray ionization mass spectrometry. These studies demonstrate the advantage of MAIV for the real-time characterization of labile peroxides in the surface layers of solid particles. The presence of peroxides on the surface may be important for surface oxidation processes as well as for the toxicity of inhaled particles.
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Affiliation(s)
- Yiming Qin
- Department of Chemistry, University
of California, Irvine, California 92697-2025 United States
| | - Véronique Perraud
- Department of Chemistry, University
of California, Irvine, California 92697-2025 United States
| | | | - Lisa M. Wingen
- Department of Chemistry, University
of California, Irvine, California 92697-2025 United States
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4
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Wu Y, Kang J, Gao W, Bi M, Yang D, Ji R, Meng Q, Ma C. A DFT and kinetic study: Is it possible to prepare epoxides without catalysts using the in-situ generated peroxy radicals or peroxides by one-step method? J Comput Chem 2023. [PMID: 37283494 DOI: 10.1002/jcc.27172] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/11/2023] [Accepted: 05/24/2023] [Indexed: 06/08/2023]
Abstract
DFT calculations and kinetic analysis have been employed to comprehensively explore the possibility to prepare epoxides by one-step method using the in-situ generated peroxy radicals or hydroperoxides as epoxidizing agents. Computational studies demonstrated that the selectivities for the reaction systems of O2 /R2/R1, O2 /CuH/R1, O2 /CuH/styrene, O2 /AcH/R1 were 68.2%, 69.6%, 100% and 93.3%, respectively. The in-situ generated peroxide radicals, such as HOO˙, CuOO˙ and AcOO˙, could react with R1 or styrene by attacking the CC double bond to form a CO bond and subsequently undergoing a cleavage of OO bond to yield epoxides. Peroxide radicals could abstract a hydrogen atom from methyl group on R1, forming unwanted by-products. It should be noted that the hydrogen atoms of HOO˙ is easy to be abstracted by CC double bond and simultaneously the oxygen atom is connected to the CH moiety to form an alkyl peroxy radical (Rad11), greatly limiting the selectivity. The comprehensive mechanistic studies provide a deep understanding on preparing epoxides by one-step method.
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Affiliation(s)
- Yufeng Wu
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Jiajie Kang
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Wei Gao
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Mingshu Bi
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Dongcheng Yang
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Runlai Ji
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Qingwei Meng
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
| | - Cunfei Ma
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, China
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5
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Warzecha M, Morris G, McLean AJ, Calvo-Castro J, McHugh CJ. Detection of Nitroaromatic and Peroxide-Based Explosives with Amine- and Phosphine-Functionalized Diketopyrrolopyrroles. ACS Appl Mater Interfaces 2023. [PMID: 37255311 DOI: 10.1021/acsami.3c02714] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Effective strategies for the detection and identification of explosives are highly desirable. Herein, we illustrate the efficient optoelectronic detection of nitroaromatic and peroxide-based explosives using amine- and phosphine-substituted diketopyrrolopyrroles. Selective quenching and an unprecedented enhancement of thin-film emission in the presence of nitroaromatic vapors are demonstrated via the judicious choice of amine substituents. The modulation of fluorescence emission in each case is shown to be dominated by electronic and thermodynamic effects, the vapor pressure of explosives, and the thin-film morphology. For peroxide detection, we describe an approach exploiting redox-mediated functional group transformation. The rapid oxidation of triphenylphosphine to phosphine oxide with hydrogen peroxide affords a significant increase in fluorescence emission, facilitating the sensitive turn-on detection of an important class of explosives at ppb concentrations.
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Affiliation(s)
- Monika Warzecha
- EPSRC CMAC Future Manufacturing Research Hub, c/o Strathclyde Institute of Pharmacy and Biomedical Sciences, Technology and Innovation Centre, 99 George Street, Glasgow G1 1RD, U.K
| | - Graeme Morris
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, U.K
| | - Andrew J McLean
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, U.K
| | - Jesus Calvo-Castro
- School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, U.K
| | - Callum J McHugh
- School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, U.K
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6
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Song S, Cheng X, Cheng S, Lin YM, Gong L. Fe-Catalyzed Aliphatic C-H Methylation of Glycine Derivatives and Peptides. Chemistry 2023; 29:e202203404. [PMID: 36545842 DOI: 10.1002/chem.202203404] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Direct and selective C-H methylation is a powerful tool with which to install methyl groups into organic molecules, and is particularly useful in pharmaceutical chemistry. However, practical methods for such modification of biologically interesting targets have been rarely developed. We here report an iron-catalyzed C(sp3 )-H methylation reaction of glycine derivatives, peptides and drug-like molecules in an alcohol in the presence of di-tert-butyl peroxide. A readily available iron catalyst plays multiple roles in the transformation, which accelerates oxidation of C-N bonds to C=N double bonds, activates imine intermediates as Lewis acids by bidentate chelation, and at the same time facilitates cleavage of the peroxide to generate methyl radicals. A variety of methylated N-aryl glycine derivatives and peptides were obtained in good yield and with excellent chemo- and site-selectivity. This reaction is scalable, easily managed, and can be completed within 1-2 h. It features an economic, bio-friendly catalyst, a green solvent and low toxic reagents, and will provide effective access to precise C-H modification of biomolecules and natural products.
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Affiliation(s)
- Silin Song
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Xiuliang Cheng
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Shiyan Cheng
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Yu-Mei Lin
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Lei Gong
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), 361005, Xiamen, China
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7
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Müller-Heupt LK, Wiesmann-Imilowski N, Schröder S, Groß J, Ziskoven PC, Bani P, Kämmerer PW, Schiegnitz E, Eckelt A, Eckelt J, Ritz U, Opatz T, Al-Nawas B, Synatschke CV, Deschner J. Oxygen-Releasing Hyaluronic Acid-Based Dispersion with Controlled Oxygen Delivery for Enhanced Periodontal Tissue Engineering. Int J Mol Sci 2023; 24:ijms24065936. [PMID: 36983008 PMCID: PMC10059003 DOI: 10.3390/ijms24065936] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/16/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
Periodontitis is a chronic biofilm-associated inflammatory disease of the tooth-supporting tissues that causes tooth loss. It is strongly associated with anaerobic bacterial colonization and represents a substantial global health burden. Due to a local hypoxic environment, tissue regeneration is impaired. Oxygen therapy has shown promising results as a potential treatment of periodontitis, but so far, local oxygen delivery remains a key technical challenge. An oxygen (O2)-releasing hyaluronic acid (HA)-based dispersion with a controlled oxygen delivery was developed. Cell viability of primary human fibroblasts, osteoblasts, and HUVECs was demonstrated, and biocompatibility was tested using a chorioallantoic membrane assay (CAM assay). Suppression of anaerobic growth of Porphyromonas gingivalis was shown using the broth microdilution assay. In vitro assays showed that the O2-releasing HA was not cytotoxic towards human primary fibroblasts, osteoblasts, and HUVECs. In vivo, angiogenesis was enhanced in a CAM assay, although not to a statistically significant degree. Growth of P. gingivalis was inhibited by CaO2 concentrations higher than 256 mg/L. Taken together, the results of this study demonstrate the biocompatibility and selective antimicrobial activity against P. gingivalis for the developed O2-releasing HA-based dispersion and the potential of O2-releasing biomaterials for periodontal tissue regeneration.
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Affiliation(s)
- Lena Katharina Müller-Heupt
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Nadine Wiesmann-Imilowski
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeck Str. 1, 55131 Mainz, Germany
| | - Sofia Schröder
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Jonathan Groß
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Pablo Cores Ziskoven
- Department of Periodontology and Operative Dentistry, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Philipp Bani
- Department of Periodontology and Operative Dentistry, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Peer Wolfgang Kämmerer
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Eik Schiegnitz
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | - Anja Eckelt
- WEE-Solve GmbH, Auf der Burg 6, 55130 Mainz, Germany
| | - John Eckelt
- WEE-Solve GmbH, Auf der Burg 6, 55130 Mainz, Germany
| | - Ulrike Ritz
- Department of Orthopaedics and Traumatology, University Medical Center Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
| | | | - James Deschner
- Department of Periodontology and Operative Dentistry, University Medical Center Mainz, Augustusplatz 2, 55131 Mainz, Germany
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8
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Augustine R, Gezek M, Seray Bostanci N, Nguyen A, Camci-Unal G. Oxygen-Generating Scaffolds: One Step Closer to the Clinical Translation of Tissue Engineered Products. Chem Eng J 2023; 455:140783. [PMID: 36644784 PMCID: PMC9835968 DOI: 10.1016/j.cej.2022.140783] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The lack of oxygen supply in engineered constructs has been an ongoing challenge for tissue engineering and regenerative medicine. Upon implantation of an engineered tissue, spontaneous blood vessel formation does not happen rapidly, therefore, there is typically a limited availability of oxygen in engineered biomaterials. Providing oxygen in large tissue-engineered constructs is a major challenge that hinders the development of clinically relevant engineered tissues. Similarly, maintaining adequate oxygen levels in cell-laden tissue engineered products during transportation and storage is another hurdle. There is an unmet demand for functional scaffolds that could actively produce and deliver oxygen, attainable by incorporating oxygen-generating materials. Recent approaches include encapsulation of oxygen-generating agents such as solid peroxides, liquid peroxides, and fluorinated substances in the scaffolds. Recent approaches to mitigate the adverse effects, as well as achieving a sustained and controlled release of oxygen, are discussed. Importance of oxygen-generating materials in various tissue engineering approaches such as ex vivo tissue engineering, in situ tissue engineering, and bioprinting are highlighted in detail. In addition, the existing challenges, possible solutions, and future strategies that aim to design clinically relevant multifunctional oxygen-generating biomaterials are provided in this review paper.
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Affiliation(s)
- Robin Augustine
- Department of Chemical Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Mert Gezek
- Department of Chemical Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Biomedical Engineering and Biotechnology Graduate Program, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Nazli Seray Bostanci
- Department of Chemical Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Biomedical Engineering and Biotechnology Graduate Program, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Angelina Nguyen
- Department of Chemical Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Biomedical Engineering and Biotechnology Graduate Program, University of Massachusetts, Lowell, Massachusetts 01854, United States
| | - Gulden Camci-Unal
- Department of Chemical Engineering, University of Massachusetts, Lowell, Massachusetts 01854, United States
- Department of Surgery, University of Massachusetts Medical School, Worcester, Massachusetts 01605, United States
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9
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Ke Y, Gall BK, Dewey NS, Rotavera B, Ferreira EM. Multigram Synthesis of a Combustion-Relevant δ-Ketohydroperoxide through Sulfonylhydrazine Substitution. Chemistry 2022; 28:e202202266. [PMID: 35945143 PMCID: PMC9643622 DOI: 10.1002/chem.202202266] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Indexed: 01/11/2023]
Abstract
A synthesis of a δ-ketohydroperoxide is described, addressing potential functional-group compatibilities in these elusive species relevant to combustion and atmospheric chemistries. The hydroperoxide is installed via sulfonylhydrazine substitution, which was found to be more effective than displacement of secondary halides. As part of this protocol, it was observed that 1,2-dimethoxyethane is an advantageous medium for the reaction, avoiding the formation of a tetrahydrofuran hydroperoxide side product. This discovery facilitated the multigram synthesis (6 steps, 41 % yield overall) and discrete characterization of the target δ-ketohydroperoxide.
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Affiliation(s)
- Yan‐Ting Ke
- Department of ChemistryUniversity of GeorgiaAthensGeorgia30602United States
| | - Bradley K. Gall
- Department of ChemistryUniversity of GeorgiaAthensGeorgia30602United States
| | - Nicholas S. Dewey
- Department of ChemistryUniversity of GeorgiaAthensGeorgia30602United States
| | - Brandon Rotavera
- Department of ChemistryUniversity of GeorgiaAthensGeorgia30602United States,College of EngineeringUniversity of GeorgiaAthensGeorgia30602United States
| | - Eric M. Ferreira
- Department of ChemistryUniversity of GeorgiaAthensGeorgia30602United States
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Qin X, Chen Z, Gong Y, Dong P, Cao Z, Hu J, Xu J. Persistent Uptake of H 2O 2 onto Ambient PM 2.5 via Dark-Fenton Chemistry. Environ Sci Technol 2022; 56:9978-9987. [PMID: 35758291 DOI: 10.1021/acs.est.2c03630] [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] [Indexed: 06/15/2023]
Abstract
Particulate matter (PM) and gaseous hydrogen peroxide (H2O2) interact ubiquitously to influence atmospheric oxidizing capacity. However, quantitative information on H2O2 loss and its fate on urban aerosols remain unclear. This study investigated the kinetics of heterogeneous reactions of H2O2 on PM2.5 and explored how these processes are affected by various experimental conditions (i.e., relative humidity, temperature, and H2O2 concentration). We observed a persistent uptake of H2O2 by PM2.5 (with the uptake coefficients (γ) of 10-4-10-3) exacerbated by aerosol liquid water and temperature, confirming the critical role of water-assisted chemical decomposition during the uptake process. A positive correlation between the γ values and the ratio of dissolved iron concentration to H2O2 concentration suggests that Fenton catalytic decomposition may be an important pathway for H2O2 conversion on PM2.5 under dark conditions. Furthermore, on the basis of kinetic data gained, the parameterization of H2O2 uptake on PM2.5 was developed and was applied into a box model. The good agreement between simulated and measured H2O2 uncovered the significant role that heterogeneous uptake plays in the sink of H2O2 in the atmosphere. These findings suggest that the composition-dependent particle reactivity toward H2O2 should be considered in atmospheric models for elucidating the environmental and health effects of H2O2 uptake by ambient aerosols.
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Affiliation(s)
- Xuan Qin
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Zhongming Chen
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Yiwei Gong
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Ping Dong
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Zhijiong Cao
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Jingcheng Hu
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Jiayun Xu
- State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
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11
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López-Martínez MJ, Escribano D, Ortín-Bustillo A, Franco-Martínez L, González-Arostegui LG, Cerón JJ, Rubio CP. Changes in Biomarkers of Redox Status in Saliva of Pigs after an Experimental Sepsis Induction. Antioxidants (Basel) 2022; 11:antiox11071380. [PMID: 35883871 PMCID: PMC9311702 DOI: 10.3390/antiox11071380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/07/2022] [Accepted: 07/14/2022] [Indexed: 01/17/2023] Open
Abstract
Saliva from pigs is gaining attention as an easy sample to obtain, being a source of biomarkers that can provide information on animal health and welfare. This study aimed to evaluate the changes that can occur in salivary biomarkers of the redox status of pigs with an experimentally induced sepsis. For that, the cupric reducing antioxidant capacity (CUPRAC), ferric reducing ability of saliva (FRAS), Trolox equivalent antioxidant capacity (TEAC), advanced oxidation protein products (AOPP), ferrous oxidation-xylenol orange (FOX), peroxide activity (POX-Act), and reactive oxygen-derived compounds (d-ROMs) were measured in the saliva of pigs with experimentally induced sepsis by endotoxin lipopolysaccharide (LPS), non-septic inflammation induced by turpentine, and in healthy individuals before and after 3 h, 6 h, 24 h, and 48 h. AOPP, POX-Act, and d-ROMs in the sepsis group were higher than in the control from 3 h to 24 h after the inoculation. CUPRAC, FRAS, and TEAC were higher in sepsis than the control group at 24 h. These changes were of higher magnitude than those that occurred in the turpentine group. In conclusion, our findings reveal that sepsis produces changes in salivary biomarkers of redox status, which opens the possibility of using them as potential biomarkers in this species.
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Affiliation(s)
- María José López-Martínez
- Interdisciplinary Laboratory of Clinical Analysis, Interlab-UMU, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.J.L.-M.); (D.E.); (A.O.-B.); (L.F.-M.); (L.G.G.-A.); (J.J.C.)
| | - Damián Escribano
- Interdisciplinary Laboratory of Clinical Analysis, Interlab-UMU, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.J.L.-M.); (D.E.); (A.O.-B.); (L.F.-M.); (L.G.G.-A.); (J.J.C.)
- Department of Animal Production, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain
| | - Alba Ortín-Bustillo
- Interdisciplinary Laboratory of Clinical Analysis, Interlab-UMU, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.J.L.-M.); (D.E.); (A.O.-B.); (L.F.-M.); (L.G.G.-A.); (J.J.C.)
| | - Lorena Franco-Martínez
- Interdisciplinary Laboratory of Clinical Analysis, Interlab-UMU, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.J.L.-M.); (D.E.); (A.O.-B.); (L.F.-M.); (L.G.G.-A.); (J.J.C.)
| | - Luis Guillermo González-Arostegui
- Interdisciplinary Laboratory of Clinical Analysis, Interlab-UMU, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.J.L.-M.); (D.E.); (A.O.-B.); (L.F.-M.); (L.G.G.-A.); (J.J.C.)
| | - José Joaquín Cerón
- Interdisciplinary Laboratory of Clinical Analysis, Interlab-UMU, Regional Campus of International Excellence “Mare Nostrum”, University of Murcia, 30100 Murcia, Spain; (M.J.L.-M.); (D.E.); (A.O.-B.); (L.F.-M.); (L.G.G.-A.); (J.J.C.)
| | - Camila Peres Rubio
- Department of Animal and Food Science, School of Veterinary Science, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
- Correspondence:
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12
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Gu J, Song Y, Yang Y, Guan C, Jiang J. Mechanical Insights into Activation of Peroxides by Quinones: Formation of Oxygen-Centered Radicals or Singlet Oxygen. Environ Sci Technol 2022; 56:8776-8783. [PMID: 35533403 DOI: 10.1021/acs.est.1c08883] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, the mechanism of the activation of peroxides by quinones has been investigated through quantum chemical calculations. Hydrogen peroxide (H2O2), peroxomonosulfate (PMS), peracetic acid (PAA), and CH3OOH were chosen as the model peroxides and p-benzoquinone (p-BQ) and tetrachloro-1,4-benzoquinone (TCBQ) as the model quinones. The nucleophilic attack of peroxides can occur on the carbonyl and olefinic carbons of quinones. For p-BQ, the nucleophilic attack of HO2-, CH3OO-, PMS, and PAA might prefer to occur on the carbonyl carbons, which have more positive atomic charges. Then, further transformation could not be induced from the addition of HO2- and CH3OO- to p-BQ. Comparatively, singlet oxygen (1O2) could be generated in the cases of PMS and PAA. For TCBQ, the chlorine atoms cause the olefinic carbons to carry more positive atomic charges, and then, HO2- preferred to add to the olefinic carbons, which might induce the formation of the hydroxyl radical (•OH). The activation of PMS by TCBQ was similar to that by p-BQ, with the kinetical feasibility of 1O2 formation. These findings may provide some theoretical insights into the reaction of peroxides with quinones, especially into the interconnection between the substitutes and the formation of oxygen-centered radicals (e.g., •OH) and 1O2.
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Affiliation(s)
- Jia Gu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| | - Yang Song
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
| | - Yi Yang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China
| | - Chaoting Guan
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, Guangdong, China
| | - Jin Jiang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, Guangdong, China
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13
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Hu M, Tonokura K, Morino Y, Sato K, Enami S. Effects of Metal Ions on Aqueous-Phase Decomposition of α-Hydroxyalkyl-Hydro peroxides Derived from Terpene Alcohols. Environ Sci Technol 2021; 55:12893-12901. [PMID: 34525797 DOI: 10.1021/acs.est.1c04635] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We report the results of a mass spectrometric study of the effects of atmospherically relevant metal ions on the decomposition of α-hydroxyalkyl-hydroperoxides (α-HHs) derived from ozonolysis of α-terpineol in aqueous solutions. By direct mass spectrometric detection of chloride adducts of α-HHs, we assessed the temporal profiles of α-HHs and other products in the presence of metal ions. In addition, reactions between α-HHs and FeCl2 in the presence of excess DMSO showed that the amount of hydroxyl radicals formed in a mixture of α-terpineol, O3, and FeCl2 was 5.7 ± 0.8% of the amount formed in a mixture of H2O2 and FeCl2. The first-order rate constants for the decay of α-HHs produced by ozonolysis of α-terpineol in the presence of 5 mM acetate buffer at a pH of 5.1 ± 0.1 were determined to be (4.5 ± 0.1) × 10-4 s-1 (no metal ions), (4.7 ± 0.2) × 10-4 s-1 (with 0.05 mM Fe2+), (4.7 ± 0.1) × 10-4 s-1 (with 0.05 mM Zn2+), and (4.8 ± 0.2) × 10-4 s-1 (with 0.05 mM Cu2+). We propose that in acidic aqueous media, the reaction of α-HHs with Fe2+ is outcompeted by H+-catalyzed decomposition of α-HHs, which produces the corresponding aldehydes and H2O2, which can in turn react with Fe2+ to form hydroxyl radicals.
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Affiliation(s)
- Mingxi Hu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Kenichi Tonokura
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Yu Morino
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| | - Kei Sato
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| | - Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
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14
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Vargo NP, Harland JB, Musselman BW, Lehnert N, Ertem MZ, Robinson JR. Calcium-Ion Binding Mediates the Reversible Interconversion of Cis and Trans Peroxido Dicopper Cores. Angew Chem Int Ed Engl 2021; 60:19836-19842. [PMID: 34101958 DOI: 10.1002/anie.202105421] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/07/2021] [Indexed: 01/27/2023]
Abstract
Coupled dinuclear copper oxygen cores (Cu2 O2 ) featured in type III copper proteins (hemocyanin, tyrosinase, catechol oxidase) are vital for O2 transport and substrate oxidation in many organisms. μ-1,2-cis peroxido dicopper cores (C P) have been proposed as key structures in the early stages of O2 binding in these proteins; their reversible isomerization to other Cu2 O2 cores are directly relevant to enzyme function. Despite the relevance of such species to type III copper proteins and the broader interest in the properties and reactivity of bimetallic C P cores in biological and synthetic systems, the properties and reactivity of C P Cu2 O2 species remain largely unexplored. Herein, we report the reversible interconversion of μ-1,2-trans peroxido (T P) and C P dicopper cores. CaII mediates this process by reversible binding at the Cu2 O2 core, highlighting the unique capability for metal-ion binding events to stabilize novel reactive fragments and control O2 activation in biomimetic systems.
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Affiliation(s)
- Natasha P Vargo
- Department of Chemistry, Brown University, 324 Brook Street, Providence, RI, 02912, USA
| | - Jill B Harland
- Department of Chemistry and Department of Biophysics, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 41809-1055, USA
| | - Bradley W Musselman
- Department of Chemistry and Department of Biophysics, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 41809-1055, USA
| | - Nicolai Lehnert
- Department of Chemistry and Department of Biophysics, University of Michigan, 930 North University Avenue, Ann Arbor, MI, 41809-1055, USA
| | - Mehmed Z Ertem
- Chemistry Division, Energy & Photon Sciences, Brookhaven National Laboratory, PO Box 5000, Upton, NY, 11973-5000, USA
| | - Jerome R Robinson
- Department of Chemistry, Brown University, 324 Brook Street, Providence, RI, 02912, USA
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15
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Jaha HS, Alhejoury HA, Fayad AA, Alnafisah AM, Bahshan IA, Assiri SI, Alsubhi AS. Knowledge, Practices, and Perceptions about Tooth Whitening among Female Population in Saudi Arabia - A Cross-Sectional Study. J Pharm Bioallied Sci 2021; 13:S817-S820. [PMID: 34447207 PMCID: PMC8375851 DOI: 10.4103/jpbs.jpbs_769_20] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/06/2020] [Accepted: 12/10/2020] [Indexed: 11/04/2022] Open
Abstract
Background: Tooth-whitening procedures have gained wide popularity among the Saudi population. The present study aimed to assess the knowledge, attitude, and perception about tooth-whitening procedures among Jeddah's general population. Materials and Methods: A face-to-face interview was conducted on randomly selected female patients attending dental clinics. A pretested and structured questionnaire was used to record the response by calibrated interviewers. The responses regarding knowledge, attitude, and perceptions were recorded and subjected to statistical analysis. Results: The findings showed that the prevalence of tooth whitening among the participants was 43.7%, and about 8.7% reported that they did it once every year. In-office bleaching was the most preferred method (31.4%), followed by whitening toothpaste (8.7%). An increased frequency of bleaching was reported by participants belonging to younger age group (P < 0.001). Conclusion: The knowledge related to the mechanism of action and adverse effects was average among the participants. Younger age groups were more concerned about tooth-whitening procedures compared to the older ones.
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Affiliation(s)
- Hani Sabri Jaha
- Dentistry Program, King Abdul Aziz University, Jeddah, Saudi Arabia
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16
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Žarković N, Orehovec B, Milković L, Baršić B, Tatzber F, Wonisch W, Tarle M, Kmet M, Mataić A, Jakovčević A, Vuković T, Talić D, Waeg G, Lukšić I, Skrzydlewska E, Žarković K. Preliminary Findings on the Association of the Lipid Peroxidation Product 4-Hydroxynonenal with the Lethal Outcome of Aggressive COVID-19. Antioxidants (Basel) 2021; 10:antiox10091341. [PMID: 34572973 PMCID: PMC8472532 DOI: 10.3390/antiox10091341] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 01/23/2023] Open
Abstract
Major findings of the pilot study involving 21 critically ill patients during the week after admission to the critical care unit specialized for COVID-19 are presented. Fourteen patients have recovered, while seven passed away. There were no differences between them in respect to clinical or laboratory parameters monitored. However, protein adducts of the lipid peroxidation product 4-hydroxynonenal (HNE) were higher in the plasma of the deceased patients, while total antioxidant capacity was below the detection limit for the majority of sera samples in both groups. Moreover, levels of the HNE-protein adducts were constant in the plasma of the deceased patients, while in survivors, they have shown prominent and dynamic variations, suggesting that survivors had active oxidative stress response mechanisms reacting to COVID-19 aggression, which were not efficient in patients who died. Immunohistochemistry revealed the abundant presence of HNE-protein adducts in the lungs of deceased patients indicating that HNE is associated with the lethal outcome. It seems that HNE was spreading from the blood vessels more than being a consequence of pneumonia. Due to the limitations of the relatively small number of patients involved in this study, further research on HNE and antioxidants is needed. This might allow a better understanding of COVID-19 and options for utilizing antioxidants by personalized, integrative biomedicine approach to prevent the onset of HNE-mediated vitious circle of lipid peroxidation in patients with aggressive inflammatory diseases.
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Affiliation(s)
- Neven Žarković
- Laboratory for Oxidative Stress (LabOS), Ruđer Bošković Institute, 10000 Zagreb, Croatia; (L.M.); (T.V.); (D.T.)
- Correspondence: ; Tel.: +385-1-4571212
| | - Biserka Orehovec
- Clinical Hospital Dubrava, 10000 Zagreb, Croatia; (B.O.); (B.B.); (M.T.); (M.K.); (I.L.)
| | - Lidija Milković
- Laboratory for Oxidative Stress (LabOS), Ruđer Bošković Institute, 10000 Zagreb, Croatia; (L.M.); (T.V.); (D.T.)
| | - Bruno Baršić
- Clinical Hospital Dubrava, 10000 Zagreb, Croatia; (B.O.); (B.B.); (M.T.); (M.K.); (I.L.)
| | - Franz Tatzber
- Omnignostica Ltd., 3421 Höflein an der Donau, Austria; (F.T.); (W.W.)
| | - Willibald Wonisch
- Omnignostica Ltd., 3421 Höflein an der Donau, Austria; (F.T.); (W.W.)
| | - Marko Tarle
- Clinical Hospital Dubrava, 10000 Zagreb, Croatia; (B.O.); (B.B.); (M.T.); (M.K.); (I.L.)
| | - Marta Kmet
- Clinical Hospital Dubrava, 10000 Zagreb, Croatia; (B.O.); (B.B.); (M.T.); (M.K.); (I.L.)
| | - Ana Mataić
- Department of Pathology, Clinical Hospital Centre Zagreb, 10000 Zagreb, Croatia; (A.M.); (A.J.); (K.Ž.)
| | - Antonia Jakovčević
- Department of Pathology, Clinical Hospital Centre Zagreb, 10000 Zagreb, Croatia; (A.M.); (A.J.); (K.Ž.)
| | - Tea Vuković
- Laboratory for Oxidative Stress (LabOS), Ruđer Bošković Institute, 10000 Zagreb, Croatia; (L.M.); (T.V.); (D.T.)
| | - Danijela Talić
- Laboratory for Oxidative Stress (LabOS), Ruđer Bošković Institute, 10000 Zagreb, Croatia; (L.M.); (T.V.); (D.T.)
| | - Georg Waeg
- Institute of Molecular Biosciences, Karl Franzens University, 8010 Graz, Austria;
| | - Ivica Lukšić
- Clinical Hospital Dubrava, 10000 Zagreb, Croatia; (B.O.); (B.B.); (M.T.); (M.K.); (I.L.)
- Department of Pathology, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Elzbieta Skrzydlewska
- Department of Inorganic and Analytical Chemistry, Medical University of Bialystok, 15-089 Bialystok, Poland;
| | - Kamelija Žarković
- Department of Pathology, Clinical Hospital Centre Zagreb, 10000 Zagreb, Croatia; (A.M.); (A.J.); (K.Ž.)
- Department of Pathology, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
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17
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Garay-Ruiz D, Bo C. Rationalizing the Mechanism of Peroxyformate Decomposition: Computational Insights To Understand Solvent Influence. Chemistry 2021; 27:11618-11626. [PMID: 34076322 PMCID: PMC8457178 DOI: 10.1002/chem.202100755] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Indexed: 11/29/2022]
Abstract
The heterolytic decomposition of tert‐butyl peroxyformate to tert‐butanol and carbon dioxide, catalyzed by pyridine, is a long‐known example of a reaction whose kinetics are strongly affected by solvent polarity. From DFT and ab initio methods together with the SMD implicit solvation model, an extension on the formerly accepted mechanism is proposed. This novel proposal involves the formation of a carbonic acid ester intermediate and its further decomposition, through an unreported pyridine‐mediated stepwise route. Computed barriers for this mechanism at DLPNO/CCSD(T)‐def2‐TZVP are in excellent agreement with experimental kinetic data across different solvents. Furthermore, the strong relationships between activation energies, geometric parameters in the transition state and the characteristics of the different solvents are also analyzed in depth.
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Affiliation(s)
- Diego Garay-Ruiz
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science & Technology (BIST), Av. Països Catalans, 16, 43007, Tarragona, Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science & Technology (BIST), Av. Països Catalans, 16, 43007, Tarragona, Spain.,Departament de Química Física i Inorgànica, Universitat Rovira i Virgili (URV) C/ Marcel⋅lí Domingo s/n, 43007, Tarragona, Spain
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18
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Gao M, Luo Y, Xu Q, Zhao Y, Gong X, Xia Y, Hu L. A Unified Catalytic Asymmetric (4+1) and (5+1) Annulation Strategy to Access Chiral Spirooxindole-Fused Oxacycles. Angew Chem Int Ed Engl 2021; 60:19813-19820. [PMID: 34160121 DOI: 10.1002/anie.202105282] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 06/10/2021] [Indexed: 12/11/2022]
Abstract
A unified catalytic asymmetric (N+1) (N=4, 5) annulation reaction of oxindoles with bifunctional peroxides has been achieved in the presence of a chiral phase-transfer catalyst (PTC). This general strategy utilizes peroxides as unique bielectrophilic four- or five-atom synthons to participate in the C-C and the subsequent umpolung C-O bond-forming reactions with one-carbon unit nucleophiles, thus providing a distinct method to access the valuable chiral spirooxindole-tetrahydrofurans and -tetrahydropyrans with good yields and high enantioselectivities under mild conditions. DFT calculations were performed to rationalize the origin of high enantioselectivity. The gram-scale syntheses and synthetic utility of the resultant products were also demonstrated.
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Affiliation(s)
- Min Gao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Yanshu Luo
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Qianlan Xu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Yukun Zhao
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
| | - Xiangnan Gong
- Analytical and Testing Center, Chongqing University, Chongqing, 401331, China
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, China
| | - Lin Hu
- Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing, 401331, China
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19
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Liang Z, Gao J, Yu P, Yang D. History, mechanism of action, and toxicity: a review of commonly used dough rheology improvers. Crit Rev Food Sci Nutr 2021; 63:947-963. [PMID: 34309422 DOI: 10.1080/10408398.2021.1956427] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Dough rheology improvers, which often are oxidative reagents in nature, have long been used in bread-making industry to enhance protein crosslinking and subsequently improve the dough rheological properties and bread qualities. Numerous studies were conducted to explore the effects of these oxidative agents on dough quality improving, however, the underlying mechanism of their action during dough development has not been fully understood. Due to the public health concerns, multiple oxidative reagents were banned in some countries across the world, while others are still permitted in accordance with regulations. Therefore, a comprehensive understanding of their application, significance, and safety in bread manufacturing is necessary. This review aims to provide a detailed information about the evolutionary history of several commonly used oxidants acting as dough rheology improvers, their mechanisms of action, as well as their potential toxicity.
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Affiliation(s)
- Zhongxin Liang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Jihui Gao
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Peixuan Yu
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Dong Yang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
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20
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Lai MMC, Zhang HA, Kitts DD. Ginseng Prong Added to Broiler Diets Reduces Lipid Peroxidation in Refrigerated and Frozen Stored Poultry Meats. Molecules 2021; 26:molecules26134033. [PMID: 34279373 PMCID: PMC8271962 DOI: 10.3390/molecules26134033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/24/2021] [Accepted: 06/26/2021] [Indexed: 11/20/2022] Open
Abstract
Fatty acid content and lipid oxidation products were compared in chicken breast and leg meats derived from birds fed on animal-fat- and vegetable-oil-based diets, supplemented with ginseng prong powder. The first experiment examined polyunsaturated fatty acid (PUFA) content and the formation of primary and secondary lipid oxidation products in meats stored at refrigeration temperatures (4 °C) for up to 10 days, while the second experiment examined similar changes in the poultry meats when frozen stored at −18 °C, for up to six months. Results showed that initial lipid hydroperoxide concentrations increased in both breast and leg meat within the first week of refrigerated storage and also was ongoing during the first three to four months of frozen storage. A higher (p < 0.05) PUFA content in leg meat, especially in broilers fed a vegetable-oil-blended diet, corresponded to greater tendency for generation of primary lipid oxidation products after refrigerated and frozen storage (p < 0.05). The inclusion of powdered ginseng prong in broiler diets significantly inhibited (p < 0.05) secondary lipid oxidation products (e.g., malonaldehyde [MDA]) formation in both stored leg and breast meat, compared to controls. Significant interactions (p < 0.05) were obtained for storage time and inclusion of ginseng against production of primary and secondary lipid oxidation in broiler breast and leg meats from broilers fed PUFA-containing diets. We conclude that including ginseng prong in broiler growing diets represents a viable strategy to control lipid oxidation in refrigerated/cold-stored meat products.
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21
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Butreddy A, Sarabu S, Bandari S, Batra A, Lawal K, Chen NN, Bi V, Durig T, Repka MA. Influence of Plasdone ™ S630 Ultra-an Improved Copovidone on the Processability and Oxidative Degradation of Quetiapine Fumarate Amorphous Solid Dispersions Prepared via Hot-Melt Extrusion Technique. AAPS PharmSciTech 2021; 22:196. [PMID: 34184149 DOI: 10.1208/s12249-021-02069-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 06/07/2021] [Indexed: 12/20/2022] Open
Abstract
In a formulation, traces of peroxides in copovidone can impact the stability of drug substances that are prone to oxidation. The present study aimed to investigate the impact of peroxides in novel Plasdone™ S630 Ultra and compare it with regular Plasdone™ S630 on the oxidative degradation of quetiapine fumarate amorphous solid dispersions prepared via hot-melt extrusion technique. The miscibility of copovidones with drug was determined using the Hansen solubility parameter, and the results indicated a miscible drug-polymer system. Melt viscosity as a function of temperature was determined for the drug-polymer physical mixture to identify the suitable hot-melt extrusion processing temperature. The binary drug and polymer (30:70 weight ratio) amorphous solid dispersions were prepared at a processing temperature of 160°C. Differential scanning calorimetry and Fourier transform infrared spectroscopy studies of amorphous solid dispersions revealed the formation of a single-phase amorphous system with intermolecular hydrogen bonding between the drug and polymer. The milled extrudates were compressed into tablets by using extragranular components and evaluated for tabletability. Stability studies of the milled extrudates and tablet formulations were performed to monitor the oxidative degradation impurity (N-oxide). The N-oxide impurity levels in the quetiapine fumarate - Plasdone™ S630 Ultra milled extrudates and tablet formulations were reduced by 2- and 3-folds, respectively, compared to those in quetiapine fumarate - Plasdone™ S630. The reduced oxidative degradation and improved hot-melt extrusion processability of Plasdone™ S630 Ultra make it a better choice for oxidation-labile drugs over Plasdone™ S630 copovidone.
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22
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Romano R, Aiello A, De Luca L, Acunzo A, Montefusco I, Pizzolongo F. " Sfogliatella Riccia Napoletana": Realization of a Lard-Free and Palm Oil-Free Pastry. Foods 2021; 10:1393. [PMID: 34208574 PMCID: PMC8233877 DOI: 10.3390/foods10061393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/09/2021] [Accepted: 06/14/2021] [Indexed: 11/17/2022] Open
Abstract
"Sfogliatella riccia napoletana" is a typical pastry from Naples (Italy), traditionally produced using lard. In the bakery industry, palm oil is widely used to replace lard in order to obtain products without cholesterol, but it is currently under discussion, which is mostly related to the sustainability of its cultivation. Therefore, in this work, lard was replaced with palm oil-free vegetable blends composed of sunflower oil, shea butter, and coconut oil in different percentages. Traditional pastries produced with lard and pastries produced with palm oil were used as controls. Moisture, aw, free acidity, peroxide value, fatty acids, total polar compounds, and global acceptability were determined in the obtained pastries. The results indicated that the use of a vegetable oil blend composed of 40% sunflower oil, 40% shea butter, and 20% coconut oil minimized the formation of oxidized compounds (peroxides and total polar compounds) during cooking and produced a product with a moisture content very similar to that of the traditional pastry that was appreciated by consumers.
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Affiliation(s)
- Raffaele Romano
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy; (R.R.); (A.A.); (L.D.L.); (I.M.)
| | - Alessandra Aiello
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy; (R.R.); (A.A.); (L.D.L.); (I.M.)
| | - Lucia De Luca
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy; (R.R.); (A.A.); (L.D.L.); (I.M.)
| | | | - Immacolata Montefusco
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy; (R.R.); (A.A.); (L.D.L.); (I.M.)
| | - Fabiana Pizzolongo
- Department of Agricultural Sciences, University of Naples Federico II, Via Università 100, 80055 Portici, Italy; (R.R.); (A.A.); (L.D.L.); (I.M.)
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Abstract
Recent advances in peroxidase-mediated biotin tyramide (BT) signal amplification technology have resulted in high-resolution and subcellular compartment-specific mapping of protein and RNA localization. Horseradish peroxidase (HRP) in the presence of H2 O2 is known to activate phenolic compounds for phenoxy radical reaction with nucleic acids, where biotinylation by BT is a practical example. BT reactivity with RNA and DNA is not understood in detail. We report that BT phenoxy radicals react in a sequence-independent manner with guanosine bases in RNA. In contrast, DNA reactivity with BT cannot be detected by our methods under the same conditions. Remarkably, we show that fluorescein conjugates DNA rapidly and selectively reacts with BT phenoxy radicals, allowing convenient and practical biotinylation of DNA on fluorescein with retention of fluorescence.
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Affiliation(s)
- Brandon Wilbanks
- Department of Biochemistry and Molecular BiologyMayo Clinic College of Medicine and Science200 First St SWRochesterMinnesota 55905USA
| | - Brian Garcia
- Department of Biochemistry and Molecular BiologyMayo Clinic College of Medicine and Science200 First St SWRochesterMinnesota 55905USA
| | - Shane Byrne
- Department of Biological EngineeringMassachusetts Institute of TechnologyBostonMA 02139USA
| | - Peter Dedon
- Department of Biological EngineeringMassachusetts Institute of TechnologyBostonMA 02139USA
| | - L. James Maher
- Department of Biochemistry and Molecular BiologyMayo Clinic College of Medicine and Science200 First St SWRochesterMinnesota 55905USA
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24
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Dembitsky VM, Ermolenko E, Savidov N, Gloriozova TA, Poroikov VV. Antiprotozoal and Antitumor Activity of Natural Polycyclic Endo peroxides: Origin, Structures and Biological Activity. Molecules 2021; 26:686. [PMID: 33525706 PMCID: PMC7865715 DOI: 10.3390/molecules26030686] [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: 01/05/2021] [Revised: 01/20/2021] [Accepted: 01/25/2021] [Indexed: 02/08/2023] Open
Abstract
Polycyclic endoperoxides are rare natural metabolites found and isolated in plants, fungi, and marine invertebrates. The purpose of this review is a comparative analysis of the pharmacological potential of these natural products. According to PASS (Prediction of Activity Spectra for Substances) estimates, they are more likely to exhibit antiprotozoal and antitumor properties. Some of them are now widely used in clinical medicine. All polycyclic endoperoxides presented in this article demonstrate antiprotozoal activity and can be divided into three groups. The third group includes endoperoxides, which show weak antiprotozoal activity with a reliability of up to 70%, and this group includes only 1.1% of metabolites. The second group includes the largest number of endoperoxides, which are 65% and show average antiprotozoal activity with a confidence level of 70 to 90%. Lastly, the third group includes endoperoxides, which are 33.9% and show strong antiprotozoal activity with a confidence level of 90 to 99.6%. Interestingly, artemisinin and its analogs show strong antiprotozoal activity with 79 to 99.6% confidence against obligate intracellular parasites which belong to the genera Plasmodium, Toxoplasma, Leishmania, and Coccidia. In addition to antiprotozoal activities, polycyclic endoperoxides show antitumor activity in the proportion: 4.6% show weak activity with a reliability of up to 70%, 65.6% show an average activity with a reliability of 70 to 90%, and 29.8% show strong activity with a reliability of 90 to 98.3%. It should also be noted that some polycyclic endoperoxides, in addition to antiprotozoal and antitumor properties, show other strong activities with a confidence level of 90 to 97%. These include antifungal activity against the genera Aspergillus, Candida, and Cryptococcus, as well as anti-inflammatory activity. This review provides insights on further utilization of polycyclic endoperoxides by medicinal chemists, pharmacologists, and the pharmaceutical industry.
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Affiliation(s)
- Valery M. Dembitsky
- Centre for Applied Research, Innovation and Entrepreneurship, Lethbridge College, 3000 College Drive South, Lethbridge, AB T1K 1L6, Canada;
- A.V. Zhirmunsky National Scientific Center of Marine Biology, 17 Palchevsky Str., 690041 Vladivostok, Russia;
| | - Ekaterina Ermolenko
- A.V. Zhirmunsky National Scientific Center of Marine Biology, 17 Palchevsky Str., 690041 Vladivostok, Russia;
| | - Nick Savidov
- Centre for Applied Research, Innovation and Entrepreneurship, Lethbridge College, 3000 College Drive South, Lethbridge, AB T1K 1L6, Canada;
| | - Tatyana A. Gloriozova
- Institute of Biomedical Chemistry, 10 Pogodinskaya Str., 119121 Moscow, Russia; (T.A.G.); (V.V.P.)
| | - Vladimir V. Poroikov
- Institute of Biomedical Chemistry, 10 Pogodinskaya Str., 119121 Moscow, Russia; (T.A.G.); (V.V.P.)
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25
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Moriai T, Tsukamoto T, Tanabe M, Kambe T, Yamamoto K. Selective Hydroperoxygenation of Olefins Realized by a Coinage Multimetallic 1-Nanometer Catalyst. Angew Chem Int Ed Engl 2020; 59:23051-23055. [PMID: 32844511 DOI: 10.1002/anie.202010190] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Indexed: 11/07/2022]
Abstract
The science of particles on a sub-nanometer (ca. 1 nm) scale has attracted worldwide attention. However, it has remained unexplored because of the technical difficulty in the precise synthesis of sub-nanoparticles (SNPs). We recently developed the "atom-hybridization method (AHM)" for the precise synthesis of SNPs by using a suitably designed macromolecule as a template. We have now investigated the chemical reactivity of alloy SNPs obtained by the AHM. Focusing on the coinage metal elements, we systematically evaluated the oxidation reaction of an olefin catalyzed by these SNPs. The SNPs showed high catalytic performance even under milder conditions than those used with conventional catalysts. Additionally, the hybridization of multiple elements enhanced the turnover frequency and the selectivity for the formation of the hydroperoxide derivative. We discuss the unique quantum-sized catalysts providing generally unstable hydroperoxides from the viewpoint of the miniaturization and hybridization of materials.
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Affiliation(s)
- Tatsuya Moriai
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Takamasa Tsukamoto
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.,JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Makoto Tanabe
- JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Tetsuya Kambe
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.,JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Kimihisa Yamamoto
- Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan.,JST-ERATO, Yamamoto Atom Hybrid Project, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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26
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Ma H, Jiao K, Xu X, Song J. Synthesis and Characterization of a New Aluminosilicate Molecular Sieve from Aluminosilica Perhydrate Hydrogel. Materials (Basel) 2020; 13:ma13235469. [PMID: 33266326 PMCID: PMC7731451 DOI: 10.3390/ma13235469] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 11/26/2020] [Accepted: 11/26/2020] [Indexed: 11/20/2022]
Abstract
A novel structure aluminosilicate molecular sieve, named BUCT-3, was prepared by dynamic hydrothermal synthesis, and the critical factor to obtain the new structure is using an active silicon and aluminum source, aluminosilica perhydrate hydrogel. Meanwhile, only high content of O-O bonds can ensure the pure phase of BUCT-3. Through the characterization of x-ray powder diffraction (XRD), Fourier transform infrared spectra (FTIR), scanning electron microscopy (SEM), and so on, some structure and morphology information of BUCT-3 molecular sieves as well as the special silicon and aluminum source was obtained. It’s worth noticing that the O-O bonds of reactants can be reserved in the products, and thus, help us to get a new structure with cell parameters a = 8.9645 Å, b = 15.2727 Å, c = 11.3907 Å, α = 90°, β = 93.858°, γ = 90°. The crystal system is monoclinic. Though the thermostability of BUCT-3 is not satisfactory, its potential application derived from O-O bonds cannot be neglected.
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Affiliation(s)
- Haiqiang Ma
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (H.M.); (X.X.)
| | - Kun Jiao
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;
| | - Xiangyu Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (H.M.); (X.X.)
| | - Jiaqing Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (H.M.); (X.X.)
- Correspondence:
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27
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Kitamura T, Shiroshita S, Takahashi D, Toshima K. 2-Naphthol Moiety of Neocarzinostatin Chromophore as a Novel Protein-Photodegrading Agent and Its Application as a H 2 O 2 -Activatable Photosensitizer. Chemistry 2020; 26:14351-14358. [PMID: 32533610 DOI: 10.1002/chem.202000833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 06/08/2020] [Indexed: 11/09/2022]
Abstract
A 2-naphthol derivative 2 corresponding to the aromatic ring moiety of neocarzinostatin chromophore was found to degrade proteins under photo-irradiation with long-wavelength UV light without any additives under neutral conditions. Structure-activity relationship studies of the derivative revealed that methylation of the hydroxyl group at the C2 position of 2 significantly suppressed its photodegradation ability. Furthermore, a purpose-designed synthetic tumor-related biomarker, a H2 O2 -activatable photosensitizer 8 possessing a H2 O2 -responsive arylboronic ester moiety conjugated to the hydroxyl group at the C2 position of 2, showed significantly lower photodegradation ability compared to 2. However, release of the 2 from 8 by reaction with H2 O2 regenerated the photodegradation ability. Compound 8 exhibited selective photo-cytotoxicity against high H2 O2 -expressing cancer cells upon irradiation with long-wavelength UV light.
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Affiliation(s)
- Takashi Kitamura
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Saori Shiroshita
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Daisuke Takahashi
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - Kazunobu Toshima
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
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28
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Clemente SM, Martínez-Costa OH, Monsalve M, Samhan-Arias AK. Targeting Lipid Peroxidation for Cancer Treatment. Molecules 2020; 25:E5144. [PMID: 33167334 PMCID: PMC7663840 DOI: 10.3390/molecules25215144] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [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: 09/29/2020] [Revised: 10/31/2020] [Accepted: 11/03/2020] [Indexed: 02/07/2023] Open
Abstract
Cancer is one of the highest prevalent diseases in humans. The chances of surviving cancer and its prognosis are very dependent on the affected tissue, body location, and stage at which the disease is diagnosed. Researchers and pharmaceutical companies worldwide are pursuing many attempts to look for compounds to treat this malignancy. Most of the current strategies to fight cancer implicate the use of compounds acting on DNA damage checkpoints, non-receptor tyrosine kinases activities, regulators of the hedgehog signaling pathways, and metabolic adaptations placed in cancer. In the last decade, the finding of a lipid peroxidation increase linked to 15-lipoxygenases isoform 1 (15-LOX-1) activity stimulation has been found in specific successful treatments against cancer. This discovery contrasts with the production of other lipid oxidation signatures generated by stimulation of other lipoxygenases such as 5-LOX and 12-LOX, and cyclooxygenase (COX-2) activities, which have been suggested as cancer biomarkers and which inhibitors present anti-tumoral and antiproliferative activities. These findings support the previously proposed role of lipid hydroperoxides and their metabolites as cancer cell mediators. Depletion or promotion of lipid peroxidation is generally related to a specific production source associated with a cancer stage or tissue in which cancer originates. This review highlights the potential therapeutical use of chemical derivatives to stimulate or block specific cellular routes to generate lipid hydroperoxides to treat this disease.
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Affiliation(s)
- Sofia M. Clemente
- Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;
| | - Oscar H. Martínez-Costa
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid (UAM), c/Arturo Duperier 4, 28029 Madrid, Spain;
- Instituto de Investigaciones Biomédicas ‘Alberto Sols’ (CSIC-UAM), c/Arturo Duperier 4, 28029 Madrid, Spain;
| | - Maria Monsalve
- Instituto de Investigaciones Biomédicas ‘Alberto Sols’ (CSIC-UAM), c/Arturo Duperier 4, 28029 Madrid, Spain;
| | - Alejandro K. Samhan-Arias
- Departamento de Bioquímica, Facultad de Medicina, Universidad Autónoma de Madrid (UAM), c/Arturo Duperier 4, 28029 Madrid, Spain;
- Instituto de Investigaciones Biomédicas ‘Alberto Sols’ (CSIC-UAM), c/Arturo Duperier 4, 28029 Madrid, Spain;
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29
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Patel Y, Rai D, Das K, Dhandayuthapani S, Mehra S. Ethanol in Combination with Oxidative Stress Significantly Impacts Mycobacterial Physiology. J Bacteriol 2020; 202:e00222-20. [PMID: 32928928 DOI: 10.1128/JB.00222-20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/02/2020] [Indexed: 11/20/2022] Open
Abstract
Here, we investigate the mycobacterial response to the combined stress of an organic oxidant (cumene hydroperoxide [CHP]) and a solvent (ethanol). To understand the interaction between the two stressors, we treated Mycobacterium smegmatis cells to a range of ethanol concentrations (2.5% to 10% [vol/vol]) in combination with a subinhibitory concentration of 1 mM CHP. It was observed that the presence of CHP increases the efficacy of ethanol in inducing rapid cell death. The data further suggest that ethanol reacts with the alkoxy radicals to produce ethanol-derived peroxides. These radicals induce significant membrane damage and lead to cell lysis. The ethanol-derived radicals were primarily recognized by the cells as organic radicals, as was evident by the differential upregulation of the ohr-ohrR genes that function in cells treated with the combination of ethanol and CHP. The role of organic peroxide reductase, Ohr, was further confirmed by the significantly higher sensitivity of the deletion mutant to CHP and the combined stress treatment of CHP and ethanol. Moreover, we also observed the sigma factor σB to be important for the cells treated with ethanol alone as well as the aforementioned combination. A ΔsigB mutant strain had significantly higher susceptibility to the stress conditions. This finding was correlated with the σB-dependent transcriptional regulation of ohr and ohrR In summary, our data indicate that the combination of low levels of ethanol and organic peroxides induce ethanol-derived organic radicals that lead to significant oxidative stress on the cells in a concentration-dependent manner.IMPORTANCE Bacterial response to a combination of stresses can be unexpected and very different compared with that of an individual stress treatment. This study explores the physiological and transcriptional response of mycobacteria in response to the combinatorial treatment of an oxidant with the commonly used solvent ethanol. The presence of a subinhibitory concentration of organic peroxide increases the effectiveness of ethanol by inducing reactive peroxides that destroy the membrane integrity of cells in a significantly short time span. Our work elucidates a mechanism of targeting the complex mycobacterial membrane, which is its primary source of intrinsic resistance. Furthermore, it also demonstrates the importance of exploring the effect of various stress conditions on inducing bacterial clearance.
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Gorni D, Finco A. Oxidative stress in elderly population: A prevention screening study. Aging Med (Milton) 2020; 3:205-213. [PMID: 33103041 PMCID: PMC7574639 DOI: 10.1002/agm2.12121] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 06/16/2020] [Accepted: 06/19/2020] [Indexed: 12/21/2022] Open
Abstract
Background Aging is a multifactorial phenomenon, characterized by a progressive decline in the efficiency of biochemical and physiological processes and an increased susceptibility to disease. There is increasing evidence that aging and age‐related disease are correlated with an oxidative stress (OS) condition. The latter is characterized by an imbalance between reactive species (RS), in particular reactive oxygen species (ROS) and antioxidant reserve. Objectives The aim of this study is to evaluate the two main markers of oxidative stress, plasmatic peroxide concentration (through d‐ROMs FAST test, derivates‐Reactive Oxygen Metabolites) and plasmatic antioxidant power measured by iron‐reducing power (PAT test, Plasma Antioxidant Test) in 290 apparently healthy volunteers over 60, and their possible correlation with age and gender. Materials and methods Human capillary blood samples from healthy volunteers were used in this observational study for the evaluation of the markers of OS. Results The data obtained broadly demonstrate that the majority of elderly people display an OS condition characterized by increased levels of peroxides and a slight reduction in antioxidant reserve. Conclusions Seniors have a greater propensity to develop a condition of oxidative stress, and therefore it is important to associate the monitoring of oxidative stress markers and, if necessary, antioxidant supplementation, with a healthy lifestyle.
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Affiliation(s)
- Davide Gorni
- Department of Oxidation Research Cor. Con. International Srl Parma Italy
| | - Annarosa Finco
- Department of Oxidation Research Cor. Con. International Srl Parma Italy
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31
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Grootveld M, Lynch E, Page G, Chan W, Percival B, Anagnostaki E, Mylona V, Bordin-Aykroyd S, Grootveld KL. Potential Advantages of Peroxoborates and Their Ester Adducts Over Hydrogen Peroxide as Therapeutic Agents in Oral Healthcare Products: Chemical/Biochemical Reactivity Considerations In Vitro, Ex Vivo And In Vivo. Dent J (Basel) 2020; 8:E89. [PMID: 32784634 DOI: 10.3390/dj8030089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/06/2020] [Accepted: 08/04/2020] [Indexed: 12/22/2022] Open
Abstract
Peroxides present in oral healthcare products generally exert favourable protective activities against the development and progression of tooth decay, plaque, gingivitis, and halitosis, etc. However, despite the high level of research focus on hydrogen and carbamide peroxides as therapeutically active (and tooth-whitening) agents, to date the use of alternative chemical forms of peroxides such as peroxoborates for these purposes has received only scant attention. Intriguingly, peroxoborate and its esters with polyols, such as glycerol, have a very diverse chemistry/biochemistry in aqueous solution, for which there is an increasing amount of evidence that it remains distinctive from that of hydrogen peroxide; such properties include self-associative and hydrolytic equilibria, and their abilities to participate in electrophile- or nucleophile-scavenging, metal ion-complexing, redox and free radical reactions, for example. Therefore, the purpose of this detailed commentary is to evaluate both differences and similarities between the molecular/biomolecular reactivities of peroxoborate species and hydrogen peroxide in vitro, ex-vivo and in vivo. It encompasses brief sectional accounts regarding the molecular heterogeneity of peroxoborates, the release of bioactive agents therefrom, and their oxidative attack on oral cavity biomolecules (the nucleophilic or electrophilic character of these oxidations are discussed). Further areas explored are the abilities of borates and peroxoborates to enhance the solubility of iron ions in aqueous solution, their involvements in free radical biochemistry (particularly the complexation of oxygen radical-promoting transition metal ions by, and antioxidant properties of, peroxoborate-polyol ester adducts), and the specific inhibition of protease enzymes. Further aspects focus on the tooth-whitening, oral malodor neutralizing, and potential mutagenic and genotoxic properties of peroxoborates, along with possible mechanisms for these processes. The abilities of peroxoborates, and peroxides in general, to modulate the activities of inflammatory mediators and vitamins, antioxidant or otherwise, are also explored.
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32
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Dörr D, Standau T, Murillo Castellón S, Bonten C, Altstädt V. Rheology in the Presence of Carbon Dioxide (CO 2) to Study the Melt Behavior of Chemically Modified Polylactide (PLA). Polymers (Basel) 2020; 12:polym12051108. [PMID: 32414010 PMCID: PMC7285241 DOI: 10.3390/polym12051108] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/06/2020] [Accepted: 05/12/2020] [Indexed: 11/21/2022] Open
Abstract
For the preparation of polylactide (PLA)-based foams, it is commonly necessary to increase the melt strength of the polymer. Additives such as chain extenders (CE) or peroxides are often used to build up the molecular weight by branching or even crosslinking during reactive extrusion. Furthermore, a blowing agent with a low molecular weight, such as carbon dioxide (CO2), is introduced in the foaming process, which might affect the reactivity during extrusion. Offline rheological tests can help to measure and better understand the kinetics of the reaction, especially the reaction between the polymer and the chemical modifier. However, rheological measurements are mostly done in an inert nitrogen atmosphere without an equivalent gas loading of the polymer melt, like during the corresponding reactive extrusion process. Therefore, the influence of the blowing agent itself is not considered within these standard rheological measurements. Thus, in this study, a rheometer equipped with a pressure cell is used to conduct rheological measurements of neat and chemical-modified polymers in the presence of CO2 at pressures up to 40 bar. The specific effects of CO2 at elevated pressure on the reactivity between the polymer and the chemical modifiers (an organic peroxide and as second choice, an epoxy-based CE) were investigated and compared. It could be shown in the rheological experiments that the reactivity of the chain extender is reduced in the presence of CO2, while the peroxide is less affected. Finally, it was possible to detect the recrystallization temperature Trc of the unmodified and unbranched sample by the torque maximum in the rheometer, representing the tear off of the stamp from the sample. Trc was about 13 K lower in the CO2-loaded sample. Furthermore, it was possible to detect the influences of branching and gas loading simultaneously. Here the influence of the branching on Trc was much higher in comparison to a gas loading.
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Affiliation(s)
- Dominik Dörr
- Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany; (D.D.); (T.S.)
| | - Tobias Standau
- Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany; (D.D.); (T.S.)
| | - Svenja Murillo Castellón
- Institut für Kunststofftechnik, University of Stuttgart, Pfaffenwaldring 32, 70569 Stuttgart, Germany; (S.M.C.); (C.B.)
| | - Christian Bonten
- Institut für Kunststofftechnik, University of Stuttgart, Pfaffenwaldring 32, 70569 Stuttgart, Germany; (S.M.C.); (C.B.)
| | - Volker Altstädt
- Department of Polymer Engineering, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany; (D.D.); (T.S.)
- Bavarian Polymer Institute, Universitätsstraße 30, 95447 Bayreuth, Germany
- Correspondence: ; Tel.: +49-921-55-7471
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Sun J, Wu Y. Anthraquinone Redox Relay for Dye-Sensitized Photo-electrochemical H 2 O 2 Production. Angew Chem Int Ed Engl 2020; 59:10904-10908. [PMID: 32251545 DOI: 10.1002/anie.202003745] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/03/2020] [Indexed: 11/08/2022]
Abstract
Anthraquinone (AQ) redox mediators are introduced to metal-free organic dye sensitized photo-electrochemical cells (DSPECs) for the generation of H2 O2 . Instead of directly reducing O2 to produce H2 O2 , visible-light-driven AQ reduction occurs in the DSPEC and the following autooxidation with O2 allows H2 O2 accumulation and AQ regeneration. In an aqueous electrolyte, under 1 sun conditions, a water-soluble AQ salt is employed with the highest photocurrent of up to 0.4 mA cm-2 and near-quantitative faradaic efficiency for producing H2 O2 . In a non-aqueous electrolyte, under 1 sun illumination, an organic-soluble AQ is applied and the photocurrent reaches 1.8 mA cm-2 with faradaic efficiency up to 95 % for H2 O2 production. This AQ-relay DSPEC exhibits the highest photocurrent so far in non-aqueous electrolytes for H2 O2 production and excellent acid stability in aqueous electrolytes, thus providing a practical and efficient strategy for visible-light-driven H2 O2 production.
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Affiliation(s)
- Jiaonan Sun
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, USA
| | - Yiying Wu
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, USA
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Yayci A, Baraibar ÁG, Krewing M, Fueyo EF, Hollmann F, Alcalde M, Kourist R, Bandow JE. Plasma-Driven in Situ Production of Hydrogen Peroxide for Biocatalysis. ChemSusChem 2020; 13:2072-2079. [PMID: 32026604 PMCID: PMC7216967 DOI: 10.1002/cssc.201903438] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/04/2020] [Indexed: 06/10/2023]
Abstract
Peroxidases and peroxygenases are promising classes of enzymes for biocatalysis because of their ability to carry out one-electron oxidation reactions and stereoselective oxyfunctionalizations. However, industrial application is limited, as the major drawback is the sensitivity toward the required peroxide substrates. Herein, we report a novel biocatalysis approach to circumvent this shortcoming: in situ production of H2 O2 by dielectric barrier discharge plasma. The discharge plasma can be controlled to produce hydrogen peroxide at desired rates, yielding desired concentrations. Using horseradish peroxidase, it is demonstrated that hydrogen peroxide produced by plasma treatment can drive the enzymatic oxidation of model substrates. Fungal peroxygenase is then employed to convert ethylbenzene to (R)-1-phenylethanol with an ee of >96 % using plasma-generated hydrogen peroxide. As direct treatment of the reaction solution with plasma results in reduced enzyme activity, the use of plasma-treated liquid and protection strategies are investigated to increase total turnover. Technical plasmas present a noninvasive means to drive peroxide-based biotransformations.
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Affiliation(s)
- Abdulkadir Yayci
- Applied MicrobiologyFaculty of Biology and BiotechnologyRuhr University BochumUniversitätsstraße 15044780BochumGermany
| | - Álvaro Gómez Baraibar
- Microbial BiotechnologyFaculty of Biology and BiotechnologyRuhr University BochumUniversitätsstraße 15044780BochumGermany
| | - Marco Krewing
- Applied MicrobiologyFaculty of Biology and BiotechnologyRuhr University BochumUniversitätsstraße 15044780BochumGermany
| | - Elena Fernandez Fueyo
- Department of BiotechnologyDelft University of TechnologyVan der Maasweg 92629HZDelftThe Netherlands
| | - Frank Hollmann
- Department of BiotechnologyDelft University of TechnologyVan der Maasweg 92629HZDelftThe Netherlands
| | - Miguel Alcalde
- Department of BiocatalysisInstitute of Catalysis and Petrochemistry (CSIC)Campus Cantoblanco28049MadridSpain
| | - Robert Kourist
- Microbial BiotechnologyFaculty of Biology and BiotechnologyRuhr University BochumUniversitätsstraße 15044780BochumGermany
- current address: Institute for Molecular BiotechnologyGraz University of TechnologyPetersgasse 14GrazAustria
| | - Julia E. Bandow
- Applied MicrobiologyFaculty of Biology and BiotechnologyRuhr University BochumUniversitätsstraße 15044780BochumGermany
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35
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Liu S, Liu X, Zhao S, Liu Y, Li L, Ding Q, Li Y, Lin Z, Luo J, Hong M. An Exceptional Peroxide Birefringent Material Resulting from d-π Interactions. Angew Chem Int Ed Engl 2020; 59:9414-9417. [PMID: 32187424 DOI: 10.1002/anie.202002828] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Indexed: 11/11/2022]
Abstract
Birefringent materials, which can modulate the polarization of light, are almost exclusively limited to oxides. Peroxides have long been overlooked as birefringent materials, because they are usually not stable in air. Now, the first peroxide birefringent material Rb2 VO(O2 )2 F is reported, the single crystals of which keep transparency after being exposed in the air for two weeks. Interestingly, Rb2 VO(O2 )2 F does not feature an optimal anisotropic structure, but its birefringence (Δn=0.189 at 546 nm) exceeds those of the majority of oxides. According to the first-principles calculations, this exceptional birefringence should be attributed to the strong electronic interactions between localized π orbital of O2 2- anions and V5+ 3d orbitals, which may be also favorable to the stability in the air for Rb2 VO(O2 )2 F. These findings distinguish peroxides as a brand-new class of birefringent materials that may possess birefringence superior to the traditional oxides.
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Affiliation(s)
- Shuai Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
| | - Xiaomeng Liu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Sangen Zhao
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
| | - Youchao Liu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
| | - Lina Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
| | - Qingran Ding
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanqiang Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
| | - Zheshuai Lin
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Junhua Luo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
| | - Maochun Hong
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350000, P. R. China
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36
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Sands KN, Mendoza Rengifo E, George GN, Pickering IJ, Gelfand BS, Back TG. The Unexpected Role of Se VI Species in Epoxidations with Benzeneseleninic Acid and Hydrogen Peroxide. Angew Chem Int Ed Engl 2020; 59:4283-4287. [PMID: 31875332 PMCID: PMC7054174 DOI: 10.1002/anie.201913566] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/04/2019] [Indexed: 11/08/2022]
Abstract
Benzeneperoxyseleninic acid has been proposed as the key intermediate in the widely used epoxidation of alkenes with benzeneseleninic acid and hydrogen peroxide. However, it reacts sluggishly with cyclooctene and instead rapidly decomposes in solution to a mixed selenonium-selenonate salt that was identified by X-ray absorption and 77 Se NMR spectroscopy, as well as by single crystal X-ray diffraction. This process includes a selenoxide elimination of the peroxyseleninic acid with liberation of oxygen and additional redox steps. The salt is relatively stable in the solid state, but generates the corresponding selenonic acid in the presence of hydrogen peroxide. The selenonic acid is inert towards cyclooctene on its own; however, rapid epoxidation occurs when hydrogen peroxide is added. This shows that the selenonic acid must first be activated through further oxidation, presumably to the heretofore unknown benzeneperoxyselenonic acid. The latter is the principal oxidant in this epoxidation.
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Affiliation(s)
- Kai N Sands
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada
| | - Emerita Mendoza Rengifo
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan, S7N 5E2, Canada
| | - Graham N George
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan, S7N 5E2, Canada
| | - Ingrid J Pickering
- Department of Geological Sciences, University of Saskatchewan, 114 Science Place, Saskatoon, Saskatchewan, S7N 5E2, Canada
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada
| | - Thomas G Back
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada
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37
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Abstract
Peroxiredoxins (PRDXs) are members of a highly conserved peroxidase family and maintain intracellular reactive oxygen species (ROS) homeostasis. The family members are expressed in most organisms and involved in various biological processes, such as cellular protection against ROS, inflammation, carcinogenesis, atherosclerosis, heart diseases, and metabolism. In mammals, six PRDX members have been identified and are subdivided into three subfamilies: typical 2-Cys (PRDX1, PRDX2, PRDX3, and PRDX4), atypical 2-Cys (PRDX5), and 1-Cys (PRDX6) subfamilies. Knockout mouse models of PRDXs have been developed to investigate their in vivo roles. This review presents an overview of the knockout mouse models of PRDXs with emphases on the biological and physiological changes of these model mice.
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Affiliation(s)
- Young Jae Lee
- Department of Biochemistry, College of Medicine, Gachon University, Incheon 21999, Korea
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38
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Yaremenko IA, Radulov PS, Belyakova YY, Demina AA, Fomenkov DI, Barsukov DV, Subbotina IR, Fleury F, Terent'ev AO. Catalyst Development for the Synthesis of Ozonides and Tetraoxanes Under Heterogeneous Conditions: Disclosure of an Unprecedented Class of Fungicides for Agricultural Application. Chemistry 2020; 26:4734-4751. [PMID: 31774931 DOI: 10.1002/chem.201904555] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 11/24/2019] [Indexed: 01/31/2023]
Abstract
The catalyst H3+x PMo12-x +6 Mox +5 O40 supported on SiO2 was developed for peroxidation of 1,3- and 1,5-diketones with hydrogen peroxide with the formation of bridged 1,2,4,5-tetraoxanes and bridged 1,2,4-trioxolanes (ozonides) with high yield based on isolated products (up to 86 and 90 %, respectively) under heterogeneous conditions. Synthesis of peroxides under heterogeneous conditions is a rare process and represents a challenge for this field of chemistry, because peroxides tend to decompose on the surface of a catalyst . A new class of antifungal agents for crop protection, that is, cyclic peroxides: bridged 1,2,4,5-tetraoxanes and bridged ozonides, was discovered. Some ozonides and tetraoxanes exhibit a very high antifungal activity and are superior to commercial fungicides, such as Triadimefon and Kresoxim-methyl. It is important to note that none of the fungicides used in agricultural chemistry contains a peroxide fragment.
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Affiliation(s)
- Ivan A Yaremenko
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia.,Faculty of Chemical and Pharmaceutical Technology and, Biomedical Products, D.I. Mendeleev University of, Chemical Technology of Russia, 9 Miusskaya Square, Moscow, 125047, Russia.,All-Russian Research Institute for Phytopathology, 143050 B. Vyazyomy, Moscow Region, Russia
| | - Peter S Radulov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia.,All-Russian Research Institute for Phytopathology, 143050 B. Vyazyomy, Moscow Region, Russia
| | - Yulia Y Belyakova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia
| | - Arina A Demina
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia.,Department of Chemistry, M.V. Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - Dmitriy I Fomenkov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia.,Faculty of Chemical and Pharmaceutical Technology and, Biomedical Products, D.I. Mendeleev University of, Chemical Technology of Russia, 9 Miusskaya Square, Moscow, 125047, Russia
| | - Denis V Barsukov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia
| | - Irina R Subbotina
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia
| | - Fabrice Fleury
- Mechanism and regulation of DNA repair team, UFIP CNRS UMR 6286 Université de Nantes, 2 rue de la Houssinière, 44322, Nantes, France
| | - Alexander O Terent'ev
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russia.,Faculty of Chemical and Pharmaceutical Technology and, Biomedical Products, D.I. Mendeleev University of, Chemical Technology of Russia, 9 Miusskaya Square, Moscow, 125047, Russia.,All-Russian Research Institute for Phytopathology, 143050 B. Vyazyomy, Moscow Region, Russia
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39
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Giannangelo C, Anderson D, Wang X, Vennerstrom JL, Charman SA, Creek DJ. Ozonide Antimalarials Alkylate Heme in the Malaria Parasite Plasmodium falciparum. ACS Infect Dis 2019; 5:2076-2086. [PMID: 31622078 DOI: 10.1021/acsinfecdis.9b00257] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The mechanism of action of ozonide antimalarials involves activation by intraparasitic iron and the formation of highly reactive carbon-centered radicals that alkylate malaria parasite proteins. Given free intraparasitic heme is generally thought to be the iron source responsible for ozonide activation and its likely close proximity to the activated drug, we investigated heme as a possible molecular target of the ozonides. Using an extraction method optimized for solubilization of free heme, untargeted LC-MS analysis of ozonide-treated parasites identified several regioisomers of ozonide-alkylated heme, which resulted from covalent modification of the heme porphyrin ring by an ozonide-derived carbon-centered radical. In addition to the intact alkylated heme adduct, putative ozonide-alkylated heme degradation products were also detected. This study directly demonstrates ozonide modification of heme within the malaria parasite Plasmodium falciparum, revealing that this process may be important for the biological activity of ozonide antimalarials.
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Affiliation(s)
- Carlo Giannangelo
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Dovile Anderson
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Xiaofang Wang
- College of Pharmacy, University of Nebraska Medical Center, 986125 Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Jonathan L. Vennerstrom
- College of Pharmacy, University of Nebraska Medical Center, 986125 Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Susan A. Charman
- Centre for Drug Candidate Optimisation, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Darren J. Creek
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
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40
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Abril P, Del Río MP, López JA, Lledós A, Ciriano MA, Tejel C. Inner-Sphere Oxygen Activation Promoting Outer-Sphere Nucleophilic Attack on Olefins. Chemistry 2019; 25:14546-14554. [PMID: 31432579 DOI: 10.1002/chem.201903068] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/19/2019] [Indexed: 01/18/2023]
Abstract
Alkoxylation and hydroxylation reactions of 1,5-cyclooctadiene (cod) in an iridium complex with alcohols and water promoted by the reduction of oxygen to hydrogen peroxide are described. The exo configuration of the OH/OR groups in the products agrees with nucleophilic attack at the external face of the olefin as the key step. The reactions also require the presence of a coordinating protic acid (such as picolinic acid (Hpic)) and involve the participation of a cationic diolefin iridium(III) complex, [Ir(cod)(pic)2 ]+ , which has been isolated. Independently, this cation is also involved in easy alkoxy group exchange reactions, which are very unusual for organic ethers. DFT studies on the mechanism of olefin alkoxylation mediated by oxygen show a low-energy proton-coupled electron-transfer step connecting a superoxide-iridium(II) complex with hydroperoxide-iridium(III) intermediates, rather than peroxide complexes. Accordingly, a more complex reaction, with up to four different products, occurred upon reacting the diolefin-peroxide iridium(III) complex with Hpic. Moreover, such hydroperoxide intermediates are the origin of the regio- and stereoselectivity of the hydroxylation/alkoxylation reactions. If this protocol is applied to the diolefin-rhodium(I) complex [Rh(pic)(cod)], free alkyl ethers ORC8 H11 (R=Me, Et) resulted, and the reaction is enantioselective if a chiral amino acid, such as l-proline, is used instead of Hpic.
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Affiliation(s)
- Paula Abril
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - M Pilar Del Río
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - José A López
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Miguel A Ciriano
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Cristina Tejel
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009, Zaragoza, Spain
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41
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Nanjo T, Kato N, Zhang X, Takemoto Y. A Hydroperoxide-Mediated Decarboxylation of α-Ketoacids Enables the Chemoselective Acylation of Amines. Chemistry 2019; 25:15504-15507. [PMID: 31631416 DOI: 10.1002/chem.201904717] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Indexed: 01/19/2023]
Abstract
Strategies for the formation of amide bonds, that is, one of the most basic and important transformations in organic synthesis, have so far focused predominantly on dehydration reactions. Herein, we report and demonstrate the practical utility of a novel decarboxylative amidation of α-ketoacids by using inexpensive tert-butyl hydroperoxide (TBHP), which is characterized by high yields, a broad substrate scope, mild reaction conditions, and a unique chemoselectivity. These features enable the synthesis of peptides from amino acid derived α-ketoacids under preservation of the stereochemical information.
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Affiliation(s)
- Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Natsuki Kato
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Xuan Zhang
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan
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42
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Vil' VA, Barsegyan YA, Barsukov DV, Korlyukov AA, Alabugin IV, Terent'ev AO. Peroxycarbenium Ions as the "Gatekeepers" in Reaction Design: Assistance from Inverse Alpha-Effect in Three-Component β-Alkoxy-β-peroxylactones Synthesis. Chemistry 2019; 25:14460-14468. [PMID: 31487079 DOI: 10.1002/chem.201903752] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/03/2019] [Indexed: 01/12/2023]
Abstract
Stereoelectronic interactions control reactivity of peroxycarbenium cations, the key intermediates in (per)oxidation chemistry. Computational analysis suggests that alcohol involvement as a third component in the carbonyl/peroxide reactions remained invisible due to the absence of sufficiently deep kinetic traps needed to prevent the escape of mixed alcohol/peroxide products to the more stable bisperoxides. Synthesis of β-alkoxy-β-peroxylactones, a new type of organic peroxides, was accomplished by interrupting a thermodynamically driven peroxidation cascade. The higher energy β-alkoxy-β-peroxylactones do not transform into the more stable bisperoxides due to the stereoelectronically imposed instability of a cyclic peroxycarbenium intermediate as a consequence of amplified inverse alpha-effect. The practical consequence of this fundamental finding is the first three-component cyclization/condensation of β-ketoesters, H2 O2 , and alcohols that provides β-alkoxy-β-peroxylactones in 15-80 % yields.
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Affiliation(s)
- Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation.,All-Russian Research Institute for Phytopathology, B. Vyazyomy, Moscow Region, 143050, Russian Federation
| | - Yana A Barsegyan
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation.,All-Russian Research Institute for Phytopathology, B. Vyazyomy, Moscow Region, 143050, Russian Federation
| | - Denis V Barsukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, 119991, Russian Federation.,Pirogov Russian National Research Medical University, Moscow, 117997, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, 32309, USA
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospect, Moscow, 119991, Russian Federation.,All-Russian Research Institute for Phytopathology, B. Vyazyomy, Moscow Region, 143050, Russian Federation
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43
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Ghosh I, Banerjee S, Paul S, Corona T, Paine TK. Highly Selective and Catalytic Oxygenations of C-H and C=C Bonds by a Mononuclear Nonheme High-Spin Iron(III)-Alkylperoxo Species. Angew Chem Int Ed Engl 2019; 58:12534-12539. [PMID: 31246329 DOI: 10.1002/anie.201906978] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Indexed: 10/26/2022]
Abstract
The reactivity of a mononuclear high-spin iron(III)-alkylperoxo intermediate [FeIII (t-BuLUrea )(OOCm)(OH2 )]2+ (2), generated from [FeII (t-BuLUrea )(H2 O)(OTf)](OTf) (1) [t-BuLUrea =1,1'-(((pyridin-2-ylmethyl)azanediyl)bis(ethane-2,1-diyl))bis(3-(tert-butyl)urea), OTf=trifluoromethanesulfonate] with cumyl hydroperoxide (CmOOH), toward the C-H and C=C bonds of hydrocarbons is reported. 2 oxygenates the strong C-H bonds of aliphatic substrates with high chemo- and stereoselectivity in the presence of 2,6-lutidine. While 2 itself is a sluggish oxidant, 2,6-lutidine assists the heterolytic O-O bond cleavage of the metal-bound alkylperoxo, giving rise to a reactive metal-based oxidant. The roles of the urea groups on the supporting ligand, and of the base, in directing the selective and catalytic oxygenation of hydrocarbon substrates by 2 are discussed.
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Affiliation(s)
- Ivy Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-, 700032, India
| | - Sridhar Banerjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-, 700032, India
| | - Satadal Paul
- Darjeeling Polytechnic, Kurseong, Darjeeling, 734203, India
| | - Teresa Corona
- Humboldt-Universität zu Berlin, Department of Chemistry, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Tapan Kanti Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata-, 700032, India
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44
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Epple M, Meyer F, Enax J. A Critical Review of Modern Concepts for Teeth Whitening. Dent J (Basel) 2019; 7:E79. [PMID: 31374877 DOI: 10.3390/dj7030079] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/09/2019] [Accepted: 07/26/2019] [Indexed: 12/14/2022] Open
Abstract
Besides prevention of caries and periodontitis, an increasing number of oral care products focus on teeth whitening. The aim of this review is to summarize and discuss frequently used whitening agents and their efficacy from a chemical viewpoint. Therefore, a comprehensive literature survey on teeth whitening agents and products was conducted. The current whitening methods are analyzed and discussed from a chemist’s viewpoint. Frequently used whitening agents are abrasives (mechanical removal of stains), antiredeposition agents (prevention of deposition of chromophores), colorants (intended to lead to a white color), proteases (degradation of proteins), peroxides (oxidation of organic chromophores), and surfactants (removal of hydrophobic compounds from tooth surface). In-office bleaching using peroxides is effective, but side effects like tooth sensitivity or a damage of the natural organic matrix of enamel and dentin may occur. The applicability of abrasives in teeth whitening is limited due to potential tooth wear, especially when toothpastes with high RDA values are used. The effect of other whitening agents in vivo is often unclear because of a shortage of placebo-controlled clinical trials.
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Abstract
Although peroxide and leachable metal-induced chemical modifications are among the most important quality attributes in bioprocess development, there is no mainstream characterization method covering all common modifications theoretically possible on therapeutic proteins that also gives consistent results quickly. Here, we describe a method for rapid and consistent global characterization of leachable metals- or peroxide-stressed immunoglobulin (Ig) G1 monoclonal antibodies (mAbs). Using two independent protease digestions, data-independent acquisition and data-dependent acquisition liquid chromatography high-resolution mass spectrometry, we monitored 55 potential chemical modifications on trastuzumab, a humanized IgG1 mAb. Processing templates including all observed peptides were developed on Skyline to consistently monitor all modifications throughout the stress conditions for both enzymatic digestions. The Global Characterization Data Processing Site, a universal automated data processing application, was created to batch process data, plot modification trends for peptides, generate sortable and downloadable modification tables, and produce Jmol code for three-dimensional structural models of the analyzed protein. In total, 53 sites on the mAb were found to be modified. Oxidation rates generally increased with the peroxide concentration, while leachable metals alone resulted in lower rates of modifications but more oxidative degradants. Multiple chemical modifications were found on IgG1 surfaces known to interact with FcɣRIII, complement protein C1q, and FcRn, potentially affecting activity. The combination of Skyline templates and the Global Characterization Data Processing Site results in a universally applicable assay allowing users to batch process numerous modifications. Applying this new method to stability studies will promote a broader and deeper understanding of stress modifications on therapeutic proteins.
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Affiliation(s)
- Yao Chen
- a Process Development, Catalent Pharma Solutions, Inc , Bloomington , IN , USA
| | - Emma Doud
- a Process Development, Catalent Pharma Solutions, Inc , Bloomington , IN , USA
| | - Todd Stone
- a Process Development, Catalent Pharma Solutions, Inc , Bloomington , IN , USA
| | - Lun Xin
- a Process Development, Catalent Pharma Solutions, Inc , Bloomington , IN , USA
| | - Wei Hong
- a Process Development, Catalent Pharma Solutions, Inc , Bloomington , IN , USA
| | - Yunsong Li
- a Process Development, Catalent Pharma Solutions, Inc , Bloomington , IN , USA
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46
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Abstract
The reaction profiles for the uni- and bimolecular decomposition of benzyl hydroperoxide have been studied in the context of initiation reactions for the (aut)oxidation of hydrocarbons. The unimolecular dissociation of benzyl hydroperoxide was found to proceed through the formation of a hydrogen-bonded radical-pair minimum located +181 kJ mol-1 above the hydroperoxide substrate and around 15 kJ mol-1 below the separated radical products. The reaction of toluene with benzyl hydroperoxide proceeds such that O-O bond homolysis is coupled with a C-H bond abstraction event in a single kinetic step. The enthalpic barrier of this molecule-induced radical formation (MIRF) process is significantly lower than that of the unimolecular O-O bond cleavage. The same type of reaction is also possible in the self-reaction between two benzyl hydroperoxide molecules forming benzyloxyl and hydroxyl radical pairs along with benzaldehyde and water as co-products. In the product complexes formed in these MIRF reactions, both radicals connect to a centrally placed water molecule through hydrogen-bonding interactions.
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Affiliation(s)
- Lakshmanan Sandhiya
- Department Chemie, Ludwig-Maximilians-Universität München, 81377, München, Germany
| | - Hendrik Zipse
- Department Chemie, Ludwig-Maximilians-Universität München, 81377, München, Germany
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47
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Smeilus T, Mousavizadeh F, Krieger J, Tu X, Kaiser M, Giannis A. Synthesis and biological investigation of (+)-3-hydroxymethylartemisinin. Beilstein J Org Chem 2019; 15:567-570. [PMID: 30873241 PMCID: PMC6404461 DOI: 10.3762/bjoc.15.51] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 02/20/2019] [Indexed: 11/25/2022] Open
Abstract
Herein, we describe a biomimetic entry to (+)-3-hydroxymethylartemisinin (2) as well as to the artemisinin derivatives (+)-3-hydroxymethyl-9-desmethylartemisinin (16) and (+)-3-hydroxymethyl-9-epi-artemisinin (18), starting from the known and readily available chiral aldehyde 3 and alkyne 4. Subsequently, the synthesized compounds have been evaluated for their antimalarial activity against the drug-sensitive P. falciparum NF54 strain. All of them were inactive. In addition, they did not show any toxicity against L6 cells (a primary cell line derived from rat skeletal myoblasts). These results contribute to a better understanding of artemisinins mechanism of action.
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Affiliation(s)
- Toni Smeilus
- Faculty of Chemistry and Mineralogy, Institute of Organic Chemistry, University of Leipzig, Johannisallee 29, 04301 Leipzig, Germany
| | - Farnoush Mousavizadeh
- Faculty of Chemistry and Mineralogy, Institute of Organic Chemistry, University of Leipzig, Johannisallee 29, 04301 Leipzig, Germany
| | - Johannes Krieger
- Faculty of Chemistry and Mineralogy, Institute of Organic Chemistry, University of Leipzig, Johannisallee 29, 04301 Leipzig, Germany
| | - Xingzhao Tu
- Faculty of Chemistry and Mineralogy, Institute of Organic Chemistry, University of Leipzig, Johannisallee 29, 04301 Leipzig, Germany
| | - Marcel Kaiser
- Dr. M. Kaiser Swiss Tropical and Public Health Institute, Socinstrasse 57, 4051 Basel, Switzerland.,University of Basel, Petersplatz 1, 4003 Basel, Switzerland
| | - Athanassios Giannis
- Faculty of Chemistry and Mineralogy, Institute of Organic Chemistry, University of Leipzig, Johannisallee 29, 04301 Leipzig, Germany
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48
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Yang Y, Zhou L, Luo X. Non-redundant expression of the two katG genes in Vibrio parahaemolyticus V110. J Basic Microbiol 2019; 59:535-541. [PMID: 30793344 DOI: 10.1002/jobm.201800325] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 12/07/2018] [Accepted: 12/25/2018] [Indexed: 11/11/2022]
Abstract
Vibrio parahaemolyticus V110 is a marine origin pathogen infecting shrimp. Its resistance to oxidative stress is important for its survival in the complex marine ecosystems. vpa0768 (katG1) and vpa0453 (katG2) were previously found to contribute to the resistance against H2 O2 and isopropylbenzene. Our data showed that purified KatG2 and KatG1 possessed similar activity for hydrolyzing H2 O2 at 37 °C. The transcription of katG genes was induced by H2 O2 , cumene, and tert-butyl hydroperoxide (TBHP). The fold change of katG2 transcripts induced by isopropylbenzene was significantly higher than that of katG1. oxyR and rpoS are well-known regulatory genes which control the anti-oxidative and general stress response pathways, respectively. Deletion of rpoS resulted pathways, respectively. Deletion of rpoS resulted in abolishing the induction of katGs by the peroxides, and oxyR deletion only weakened the expression of the two genes. These results indicate that the two katGs encoding active enzymes are both inducible, but differ in their inducer preference. RpoS and oxyR are required for the full expression of katGs, but other unknown sensing regulators could be involved in the oxidative stress response besides OxyR.
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Affiliation(s)
- Ye Yang
- School of Life Science, Wuchang University of Technology, Wuhan, P.R. China
| | - Lingli Zhou
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, P.R. China
| | - Xuesong Luo
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, P.R. China.,State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, P.R. China
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49
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Zhang H, Dalisson B, Tran S, Barralet J. Preservation of Blood Vessels with an Oxygen Generating Composite. Adv Healthc Mater 2018; 7:e1701338. [PMID: 30277005 DOI: 10.1002/adhm.201701338] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 08/07/2018] [Indexed: 02/06/2023]
Abstract
Damage caused by oxygen deficiency (hypoxia) is one of the major factors limiting tissue and organ preservation time. Cooling tissues slows down metabolic rate of cells thereby prolonging tissue and organ survival sufficiently to allow transport and transplantation within a few hours. Although metabolism is slowed, cells and some enzymes continue to consume oxygen that can render cold stored tissues hypoxic. Here, an oxygen-generating composite (OGC) with sustained oxygen release is reported for ex vivo blood vessel preservation. Aorta segments are cultured under hypothermia for 25 days in vascular preservation media. The presence of OGC increases cell viability from 9 ± 6% to 96 ± 3% and retains 65 ± 8% of original KCl stimulated contractile force after 25 days compared with 25 ± 4% in controls. Culture for 7 days in nitrogen demonstrates proof-of-concept for normothermic blood vessel preservation, OGC increases the cell viability from 45 ± 15% to 78 ± 2%, and KCl stimulates contractile force from 49 ± 7% to 95 ± 8%, respectively. Oxygen release materials then may have a role in augmenting current preservation techniques.
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Affiliation(s)
- Huaifa Zhang
- Faculty of Dentistry; McGill University; Montreal QC H3A 1G1 Canada
| | | | - Simon Tran
- Faculty of Dentistry; McGill University; Montreal QC H3A 1G1 Canada
| | - Jake Barralet
- Faculty of Dentistry; McGill University; Montreal QC H3A 1G1 Canada
- Division of Orthopaedics; Department of Surgery; Faculty of Medicine; McGill University; Montreal QC H3A 1G1 Canada
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50
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Qiu Y, Lin C, Li J, Zhang L, Xu L, Zhao Y, Du XX, Wang L, Pan F, Liao F, Sun J. Discovery of Layered Indium Hydroxide via a Hydroperoxyl Anion Coordinated Precursor at Room Temperature. Chemistry 2018; 24:15491-15494. [PMID: 30113745 DOI: 10.1002/chem.201803093] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Indexed: 11/08/2022]
Abstract
All reported layered metal hydroxides have brucite-like metal-hydroxyl host layers, and the discovery of other types of layered metal hydroxides could significantly extend the layered metal hydroxide families, which is meaningful in both theory and applications. Here, through hydroperoxyl anion coordinated In3+ cations as a precursor, a new layered indium hydroxide was synthesized, where only a three-dimensional cubic phase had existed before. The layer of the product exhibits an unusual structure where In(OH)6 octahedra share edges and vertexes with each other to form layers, which is completely different from the common edge-sharing brucite-like metal-hydroxyl layers. By investigating the formation mechanism, the new layered structure is found to be formed by changing the traditional crystallization path through the hydroperoxyl anion coordinated intermediates. Many other new phases could also be discovered by following the same intrinsic principle.
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Affiliation(s)
- Yaming Qiu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Cong Lin
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.,College of Chemistry and Chemical Engineering, Chongqing University, NO. 174 Shazheng Street, Shapingba District, Chongqing, 400044, P. R. China
| | - Jian Li
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Lei Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Le Xu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yifang Zhao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - X Xin Du
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Ligang Wang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Fengjuan Pan
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Fuhui Liao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Junliang Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
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