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Tang MDQ, Tran NB, Nguyen THT, Nguyen KUH, Trinh NT, Van Vo T, Kobayashi M, Yoshitomi T, Nagasaki Y, Vong LB. Development of oral pH-sensitive redox nanotherapeutics for gastric ulcer therapy. J Control Release 2024; 375:758-766. [PMID: 39326501 DOI: 10.1016/j.jconrel.2024.09.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 07/25/2024] [Accepted: 09/23/2024] [Indexed: 09/28/2024]
Abstract
Gastric ulcer is a common gastrointestinal disorder worldwide. Although its pathogenesis is unclear, the overproduction of reactive oxygen species (ROS), which results in an oxidative imbalance, has been reported as a central driving mechanism. Within the scope of this investigation, we developed two different self-assembling redox nanoparticles (RNPs) with ROS-scavenging features for the oral treatment of gastric ulcers. One of them, referred to as RNPN, disintegrates in response to acidic pH, whereas the other, denoted as RNPO, remains intact regardless of pH variations. Both types of RNPs showed different free radical scavenging activities in vitro. Protonation of the amino linkages in the side chains of RNPN caused the micelle structure to collapse and the nitroxide radicals encapsulated in the core were exposed to the outside, resulting in a significant increase in antioxidant capacity as the pH decreases. In contrast, RNPO maintained its spherical structure and consistent antioxidant reactivity irrespective of pH changes. The in vivo gastric retention of orally administered RNPN was significantly improved compared to that of RNPO which might be explained by the increased exposure of cationic protonating segments in RNPN on the negatively charged gastric mucosal surface. Owing to its improved gastric retention and enhanced ROS scavenging capacity under acidic pH conditions, RNPN exhibited superior protective effects against oxidative stress induced by aspirin in a gastric ulcer mouse model compared to RNPO. In addition, neither RNPN nor RNPO resulted in severe lethal effects or significant changes in the morphology of zebrafish embryos, indicating their biosafety. Our results suggest that the oral administration of RNPs has a high therapeutic potential for gastric ulcer treatment.
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Affiliation(s)
- Minh-Dat Quoc Tang
- School of Biomedical Engineering, International University, Ho Chi Minh 700000, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam
| | - Nhi Bao Tran
- School of Biomedical Engineering, International University, Ho Chi Minh 700000, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam
| | - Thu-Ha Thi Nguyen
- School of Biomedical Engineering, International University, Ho Chi Minh 700000, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam
| | - Khanh-Uyen Hoang Nguyen
- Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam; Faculty of Biology and Biotechnology, University of Science Ho Chi Minh 700000, Viet Nam
| | - Nhu-Thuy Trinh
- School of Biomedical Engineering, International University, Ho Chi Minh 700000, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam
| | - Toi Van Vo
- School of Biomedical Engineering, International University, Ho Chi Minh 700000, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam
| | - Makoto Kobayashi
- Institute of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Toru Yoshitomi
- Research Center for Macromolecules and Biomaterials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Yukio Nagasaki
- Department of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Master's School of Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Center for Research in Radiation and Earth System Science (CRiES), University of Tsukuba, Tennoudai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan; Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8654, Japan; High-Value Biomaterials Research and Commercialization Center (HBRCC), National Taipei University of Technology, Taipei 10608, Taiwan.
| | - Long Binh Vong
- School of Biomedical Engineering, International University, Ho Chi Minh 700000, Viet Nam; Vietnam National University Ho Chi Minh City (VNU-HCM), Ho Chi Minh 700000, Viet Nam.
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Wang Y, Liu J, Yi Y, Zhu L, Liu M, Zhang Z, Xie Q, Jiang L. Insights into the synthesis, engineering, and functions of microbial pigments in Deinococcus bacteria. Front Microbiol 2024; 15:1447785. [PMID: 39119139 PMCID: PMC11306087 DOI: 10.3389/fmicb.2024.1447785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/05/2024] [Indexed: 08/10/2024] Open
Abstract
The ability of Deinococcus bacteria to survive in harsh environments, such as high radiation, extreme temperature, and dryness, is mainly attributed to the generation of unique pigments, especially carotenoids. Although the limited number of natural pigments produced by these bacteria restricts their industrial potential, metabolic engineering and synthetic biology can significantly increase pigment yield and expand their application prospects. In this study, we review the properties, biosynthetic pathways, and functions of key enzymes and genes related to these pigments and explore strategies for improving pigment production through gene editing and optimization of culture conditions. Additionally, studies have highlighted the unique role of these pigments in antioxidant activity and radiation resistance, particularly emphasizing the critical functions of deinoxanthin in D. radiodurans. In the future, Deinococcus bacterial pigments will have broad application prospects in the food industry, drug production, and space exploration, where they can serve as radiation indicators and natural antioxidants to protect astronauts' health during long-term space flights.
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Affiliation(s)
- Yuxian Wang
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, China
| | - Jiayu Liu
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, China
| | - Yuanyang Yi
- Institute of Applied Microbiology, Xinjiang Academy of Agricultural Sciences/ Xinjiang Key Laboratory of Special Environmental Microbiology, Urumqi, China
- College of Life Sciences, Xinjiang Normal University, Urumqi, China
| | - Liying Zhu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China
| | - Minghui Liu
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, China
| | - Zhidong Zhang
- Institute of Applied Microbiology, Xinjiang Academy of Agricultural Sciences/ Xinjiang Key Laboratory of Special Environmental Microbiology, Urumqi, China
| | - Qiong Xie
- China Astronaut Research and Training Center, Beijing, China
| | - Ling Jiang
- College of Food Science and Light Industry, Nanjing Tech University, Nanjing, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, China
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Gao H, Sun L, Li J, Zhou Q, Xu H, Ma X, Li R, Yu B, Tian J. Illumination of Hydroxyl Radical in Kidney Injury and High-Throughput Screening of Natural Protectants Using a Fluorescent/Photoacoustic Probe. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303926. [PMID: 37870188 PMCID: PMC10667829 DOI: 10.1002/advs.202303926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/04/2023] [Indexed: 10/24/2023]
Abstract
The hydroxyl radical (•OH) is shown to play a crucial role in the occurrence and progression of acute kidney injury (AKI). Therefore, the development of a robust •OH probe holds great promise for the early diagnosis of AKI, high-throughput screening (HTS) of natural protectants, and elucidating the molecular mechanism of intervention in AKI. Herein, the design and synthesis of an activatable fluorescent/photoacoustic (PA) probe (CDIA) for sensitive and selective imaging of •OH in AKI is reported. CDIA has near-infrared fluorescence/PA channels and fast activation kinetics, enabling the detection of the onset of •OH in an AKI model. The positive detection time of 12 h using this probe is superior to the 48-hour detection time for typical clinical assays, such as blood urea nitrogen and serum creatinine detection. Furthermore, a method is established using CDIA for HTS of natural •OH inhibitors from herbal medicines. Puerarin is screened out by activating the Sirt1/Nrf2/Keap1 signaling pathway to protect renal cells in AKI. Overall, this work provides a versatile and dual-mode tool for illuminating the •OH-related pathological process in AKI and screening additional compounds to prevent and treat AKI.
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Affiliation(s)
- Han Gao
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
| | - Lei Sun
- Jiangsu Co‐innovation Center of Efficient Processing and Utilization of Forest Resources, Key Laboratory of Forestry Genetics & Biotechnology of Ministry of Education, Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agroforest BiomassCollege of Chemical EngineeringNanjing Forestry UniversityNanjing210037P. R. China
| | - Jiwei Li
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
| | - Qilin Zhou
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
| | - Haijun Xu
- Jiangsu Co‐innovation Center of Efficient Processing and Utilization of Forest Resources, Key Laboratory of Forestry Genetics & Biotechnology of Ministry of Education, Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agroforest BiomassCollege of Chemical EngineeringNanjing Forestry UniversityNanjing210037P. R. China
- School of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang453002P. R. China
| | - Xiao‐Nan Ma
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
| | - Renshi Li
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
| | - Bo‐Yang Yu
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
| | - Jiangwei Tian
- State Key Laboratory of Natural MedicinesJiangsu Key Laboratory of TCM Evaluation and Translational ResearchCellular and Molecular Biology CenterSchool of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing211198P. R. China
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Zhu W, Wu Y, Zhang Y, Sukhanov AA, Chu Y, Zhang X, Zhao J, Voronkova VK. Preparation of Xanthene-TEMPO Dyads: Synthesis and Study of the Radical Enhanced Intersystem Crossing. Int J Mol Sci 2023; 24:11220. [PMID: 37446398 DOI: 10.3390/ijms241311220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/03/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
We prepared a rhodamine-TEMPO chromophore-radical dyad (RB-TEMPO) to study the radical enhanced intersystem crossing (REISC). The visible light-harvesting chromophore rhodamine is connected with the TEMPO (a nitroxide radical) via a C-N bond. The UV-vis absorption spectrum indicates negligible electron interaction between the two units at the ground state. Interestingly, the fluorescence of the rhodamine moiety is strongly quenched in RB-TEMPO, and the fluorescence lifetime of the rhodamine moiety is shortened to 0.29 ns, from the lifetime of 3.17 ns. We attribute this quenching effect to the intramolecular electron spin-spin interaction between the nitroxide radical and the photoexcited rhodamine chromophore. Nanosecond transient absorption spectra confirm the REISC in RB-TEMPO, indicated by the detection of the rhodamine chromophore triplet excited state; the lifetime was determined as 128 ns, which is shorter than the native rhodamine triplet state lifetime (0.58 μs). The zero-field splitting (ZFS) parameters of the triplet state of the chromophore were determined with the pulsed laser excited time-resolved electron paramagnetic resonance (TREPR) spectra. RB-TEMPO was used as a photoinitiator for the photopolymerization of pentaerythritol triacrylate (PETA). These studies are useful for the design of heavy atom-free triplet photosensitizers, the study of the ISC, and the electron spin dynamics of the radical-chromophore systems upon photoexcitation.
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Affiliation(s)
- Wenhui Zhu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Ling Gong Road, Dalian 116024, China
| | - Yanran Wu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Ling Gong Road, Dalian 116024, China
| | - Yiyan Zhang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Ling Gong Road, Dalian 116024, China
| | - Andrey A Sukhanov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of Russian Academy of Sciences, Kazan 420029, Russia
| | - Yuqi Chu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Ling Gong Road, Dalian 116024, China
| | - Xue Zhang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Ling Gong Road, Dalian 116024, China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, 2 Ling Gong Road, Dalian 116024, China
| | - Violeta K Voronkova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of Russian Academy of Sciences, Kazan 420029, Russia
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Udo T, Matsuoka Y, Takahashi M, Izumi Y, Saito K, Tazoe K, Tanaka M, Naka H, Bamba T, Yamada KI. Structural Analysis of Intracellular Lipid Radicals by LC/MS/MS Using a BODIPY-Based Profluorescent Nitroxide Probe. Anal Chem 2023; 95:4585-4591. [PMID: 36847588 DOI: 10.1021/acs.analchem.2c04950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Free radical-mediated lipid peroxidation (LPO) induces the formation of numerous lipid radicals, which contribute to the development of several oxidative diseases. To understand the mechanism of LPO in biological systems and the significance of these radicals, identifying the structures of individual lipid radicals is imperative. In this study, we developed an analytical method based on liquid chromatography coupled with tandem mass spectrometry (LC/MS/MS) and a profluorescent nitroxide probe, N-(1-oxyl-2,2,6-trimethyl-6-pentylpiperidin-4-yl)-3-(5,5-difluoro-1,3-dimethyl-3H,5H-5l4-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-7-yl)propanamide (BDP-Pen), for the detailed structural analysis of lipid radicals. The MS/MS spectra of BDP-Pen-lipid radical adducts showed product ions and thus allow the prediction of the lipid radical structures and individual detection of isomeric adducts. Using the developed technology, we separately detected the isomers of arachidonic acid (AA)-derived radicals generated in AA-treated HT1080 cells. This analytical system is a powerful tool for elucidating the mechanism of LPO in biological systems.
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Affiliation(s)
- Takumi Udo
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Yuta Matsuoka
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Masatomo Takahashi
- Division of Metabolomics, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Yoshihiro Izumi
- Division of Metabolomics, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Kota Saito
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Kaho Tazoe
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Moe Tanaka
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Hideto Naka
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Takeshi Bamba
- Division of Metabolomics, Medical Research Center for High Depth Omics, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Ken-Ichi Yamada
- Department of Molecular Pathobiology, Faculty of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
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Heavy Atom-Free Triplet Photosensitizers: Molecular Structure Design, Photophysical Properties and Application in Photodynamic Therapy. Molecules 2023; 28:molecules28052170. [PMID: 36903415 PMCID: PMC10004235 DOI: 10.3390/molecules28052170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/08/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
Photodynamic therapy (PDT) is a promising method for the treatment of cancer, because of its advantages including a low toxicity, non-drug-resistant character, and targeting capability. From a photochemical aspect, a critical property of triplet photosensitizers (PSs) used for PDT reagents is the intersystem crossing (ISC) efficiency. Conventional PDT reagents are limited to porphyrin compounds. However, these compounds are difficult to prepare, purify, and derivatize. Thus, new molecular structure paradigms are desired to develop novel, efficient, and versatile PDT reagents, especially those contain no heavy atoms, such as Pt or I, etc. Unfortunately, the ISC ability of heavy atom-free organic compounds is usually elusive, and it is difficult to predict the ISC capability of these compounds and design novel heavy atom-free PDT reagents. Herein, from a photophysical perspective, we summarize the recent developments of heavy atom-free triplet PSs, including methods based on radical-enhanced ISC (REISC, facilitated by electron spin-spin interaction), twisted π-conjugation system-induced ISC, the use of fullerene C60 as an electron spin converter in antenna-C60 dyads, energetically matched S1/Tn states-enhanced ISC, etc. The application of these compounds in PDT is also briefly introduced. Most of the presented examples are the works of our research group.
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Mołoń M, Szlachcikowska D, Stępień K, Kielar P, Galiniak S. Two faces of TEMPO (2,2,6,6-tetramethylpiperidinyl-1-oxyl) - An antioxidant or a toxin? BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119412. [PMID: 36529401 DOI: 10.1016/j.bbamcr.2022.119412] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/04/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022]
Abstract
2,2,6,6-Tetramethylpiperidine-1-oxyl, commonly known as TEMPO, is one of the compounds called nitroxides that are used in the chemical industry for synthesis of many organic compounds as well as for electrodes in all-organic radical batteries. Additionally, TEMPO is a widely used antioxidant in scientific studies. Technological progress and simultaneous care for the environment leads to resorting to new industrial methods which require the use of compounds that have not been fully tested for their impact on living organisms. Therefore, TEMPO may be an environmental pollutant and its effect on living organisms is not fully understood. The aim of our study was to determine the influence of TEMPO on the physiology, chronological lifespan and wide transcription changes of a eukaryotic model organism, namely the Saccharomyces cerevisiae yeast. For this purpose, we used the BY4741 wild-type and isogenic mutants with a disorder in the response to oxidative stress (sod1Δ, sod2Δ, yap1Δ) and repair of DNA damage (rad52Δ). We showed that supplementation with TEMPO inhibited the cell growth rate of all analyzed strains while simultaneously slowing down the aging of post-mitotic cells in the yeast population. In addition, TEMPO-treated yeast cells manifested a significantly increased level of metabolism in the wild-type and sod2Δ strains. TEMPO also displayed genoprotective effect by reducing the number of DNA double-strand breaks in cells. Here, we are the first to show the widespread effect of TEMPO on yeast. In conclusion, we have shown that, contrary to the commonly accepted notion, TEMPO has also a toxic effect, especially on active mitotic cells. We hypothesize that translation impairment or ribosome biogenesis disorder is likely to be considered secondary effects of TEMPO toxicity related to cell cycle arrest. Therefore, despite the growing interest in the use of this compound in the chemical industry, its toxic effect on the environment, especially biosphere, should be taken into account.
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Affiliation(s)
- Mateusz Mołoń
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland.
| | - Dominika Szlachcikowska
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland
| | - Karolina Stępień
- Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów University, Rzeszów, Poland
| | - Patrycja Kielar
- Department of Biology, Institute of Biology and Biotechnology, Rzeszów University, Rzeszów, Poland
| | - Sabina Galiniak
- Institute of Medical Sciences, Medical College of Rzeszów University, Rzeszów University, Rzeszów, Poland.
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Nguyen-Trinh QN, Trinh KXT, Trinh NT, Vo VT, Li N, Nagasaki Y, Vong LB. A silica-based antioxidant nanoparticle for oral delivery of Camptothecin which reduces intestinal side effects while improving drug efficacy for colon cancer treatment. Acta Biomater 2022; 143:459-470. [PMID: 35235866 DOI: 10.1016/j.actbio.2022.02.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 02/17/2022] [Accepted: 02/22/2022] [Indexed: 12/20/2022]
Abstract
Camptothecin (CPT) is a potent anticancer agent for the treatment of colorectal cancer; however, it exhibits some limitations, including poor solubility, low stability, and low bioavailability via oral administration, which restrict its usability in clinical treatments. In addition, overproduction of reactive oxygen species (ROS) during chemotherapy induces drug resistance and severe intestinal side effects. In this study, silica-installed ROS scavenging nanoparticles (siRNP) with 50-60 nm in diameter were employed to overcome the aforementioned drawbacks of CPT. The solubility of CPT was significantly improved by incorporating it into the core of the nanoparticle, forming CPT-loaded siRNP (CPT@siRNP). The anticancer activity of CPT@siRNP against colorectal cancer cells (C-26) in vitro was significantly improved as compared to free CPT through higher efficiency of intracellular internalization and induction of apoptosis. Owing to its antioxidant properties, CPT@siRNP reduced cytotoxicity to normal endothelial cells, which was in sharp contrast to the high toxicity of free CPT. Oral administration of CPT and CPT@siRNP to the C-26 tumor-bearing mice exhibited antitumor activity, accompanied by effective suppression of tumor growth. Although CPT treatment suppressed tumor progression, it caused severe side effects, including intestinal damage and significant bodyweight loss. Interestingly, such noticeable side effects were not observed in the mice treated with CPT@siRNP, and the effect of tumor growth inhibition tended to be similar to or higher than that of CPT treatment. The results obtained in this study indicate that CPT@siRNP is a potential therapeutic nanomedicine for the treatment of colon cancer. STATEMENT OF SIGNIFICANCE: Here we employed silica-containing antioxidant nanoparticle (siRNP) as promising oral delivery nanocarrier of campothecin (CPT) to treat colon cancer. The design of siRNP via covalent conjugation of antioxidant nitroxide radicals and the silanol groups in the polymer backbone contributes to a significant increase in the absorption of hydrophobic drug molecules inside the core and enhances the stability of nanoparticles in the gastrointestinal environment for oral drug delivery. CPT-loaded siRNP (CPT@siRNP) significantly improved solubility of CPT. As compared to free CTP, the CPT@siRNP treatment showed a significantly higher toxicity to colon cancer cell, inhibition of cancer cell migration, and induction of apopotosis. With the antioxidant feature, siRNP also significantly suppressed the intestinal side effects caused by CPT treatment in tumor-bearing mouse model.
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Hu J, Tian J, Wang K, Deng J, Luo G. Reaction Pathway and Selectivity Control of Tetraethyl Thiuram Disulfide Synthesis with NaHCO 3 as a pH Regulator. ACS OMEGA 2020; 5:23736-23742. [PMID: 32984692 PMCID: PMC7513355 DOI: 10.1021/acsomega.0c02707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 08/28/2020] [Indexed: 06/11/2023]
Abstract
The selectivity of a chemical reaction is related to the effective utilization of raw materials as well as the cleanliness and economy of the process. Herein, it has been first proposed to synthesize tetraethyl thiuram disulfide (TETD) with sodium bicarbonate as the pH regulator with a reaction selectivity of ∼100%. The existence of a reaction intermediate, a sodium salt of diethyl dithiocarbamoylsulfenic acid (NaEt2DTCS), has been proved by experiments and theoretical calculations. The results indicate that TETD can not only be generated from NaEt2DTCS oxidized by H2O2 directly, but also from the conjugation of NaEt2DTC and NaEt2DTCS generated in the first stage of oxidation meanwhile. Accordingly, an oxidation reaction pathway has been proposed. The reaction selectivity with NaHCO3 or CO2 as the pH regulator has been compared, and the selectivity control mechanism is discussed. At relatively higher pH values with NaHCO3 as the pH regulator, peroxidation could be almost avoided.
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Elangovan S, Holsinger RMD. Cyclical amyloid beta-astrocyte activity induces oxidative stress in Alzheimer's disease. Biochimie 2020; 171-172:38-42. [PMID: 32061803 DOI: 10.1016/j.biochi.2020.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 02/07/2020] [Indexed: 12/14/2022]
Abstract
Glial cell involvement in Alzheimer's disease (AD) is multi-faceted. The role of astrocytes in AD pathology, both as a causative agent of amyloid-beta (Aβ) production as well as a casualty of dysfunction resulting from the presence of Aβ has been well-delineated. In this review, we explore the influence of oxidative stress in astrocytes and the subsequent effect on Aβ levels in the brain from a perspective of intracellular calcium homeostasis and NADPH oxidase activity. The response of astrocytes to the presence of Aβ, as well astrocytic and microglial interaction and inflammatory cytokine release is also discussed, highlighting a cyclical behaviour of these cells in contributing to AD pathogenesis.
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Affiliation(s)
- Shalini Elangovan
- Laboratory of Molecular Neuroscience and Dementia, Brain and Mind Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, 2050, Australia
| | - R M Damian Holsinger
- Laboratory of Molecular Neuroscience and Dementia, Brain and Mind Centre, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, 2050, Australia; Discipline of Pathology, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, 2006, Australia.
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Yadav M, Singh AS, Agrahari AK, Mishra N, Tiwari VK. Silicon Industry Waste Polymethylhydrosiloxane-Mediated Benzotriazole Ring Cleavage: A Practical and Green Synthesis of Diverse Benzothiazoles. ACS OMEGA 2019; 4:6681-6689. [PMID: 31459794 PMCID: PMC6648665 DOI: 10.1021/acsomega.9b00343] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 03/29/2019] [Indexed: 06/10/2023]
Abstract
A green modification has been introduced to the synthesis of benzothiazoles by using polymethylhydrosiloxane (PMHS) for successive steps of benzotriazole ring cleavage and cyclization, an approach which was previously developed in our lab by the use of n-Bu3SnH. The use of the silicone industry byproduct PMHS makes this protocol a cost-effective and nontoxic one and thus may be considered for the industrial importance.
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13
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Verderosa AD, Dhouib R, Fairfull-Smith KE, Totsika M. Profluorescent Fluoroquinolone-Nitroxides for Investigating Antibiotic⁻Bacterial Interactions. Antibiotics (Basel) 2019; 8:antibiotics8010019. [PMID: 30836686 PMCID: PMC6466543 DOI: 10.3390/antibiotics8010019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 01/13/2023] Open
Abstract
Fluorescent probes are widely used for imaging and measuring dynamic processes in living cells. Fluorescent antibiotics are valuable tools for examining antibiotic⁻bacterial interactions, antimicrobial resistance and elucidating antibiotic modes of action. Profluorescent nitroxides are 'switch on' fluorescent probes used to visualize and monitor intracellular free radical and redox processes in biological systems. Here, we have combined the inherent fluorescent and antimicrobial properties of the fluoroquinolone core structure with the fluorescence suppression capabilities of a nitroxide to produce the first example of a profluorescent fluoroquinolone-nitroxide probe. Fluoroquinolone-nitroxide (FN) 14 exhibited significant suppression of fluorescence (>36-fold), which could be restored via radical trapping (fluoroquinolone-methoxyamine 17) or reduction to the corresponding hydroxylamine 20. Importantly, FN 14 was able to enter both Gram-positive and Gram-negative bacterial cells, emitted a measurable fluorescence signal upon cell entry (switch on), and retained antibacterial activity. In conclusion, profluorescent nitroxide antibiotics offer a new powerful tool for visualizing antibiotic⁻bacterial interactions and researching intracellular chemical processes.
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Affiliation(s)
- Anthony D Verderosa
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4001, Australia.
- Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4006, Australia.
| | - Rabeb Dhouib
- Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4006, Australia.
| | - Kathryn E Fairfull-Smith
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4001, Australia.
| | - Makrina Totsika
- Institute of Health and Biomedical Innovation, School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4006, Australia.
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14
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Lim NY, Ahn J, Won M, Choi W, Kim JS, Jung JH. Novel Cyanostilbene-Based Fluorescent Chemoprobe for Hydroxyl Radicals and Its Two-Photon Bioimaging in Living Cells. ACS APPLIED BIO MATERIALS 2019; 2:936-942. [PMID: 35016297 DOI: 10.1021/acsabm.8b00796] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel cyanostilbene derivative as a selective fluorescent chemoprobe for hydroxyl radicals was synthesized. The chemoprobe shows strong green emission in aqueous solution with the addition of hydroxyl radicals. Conversely, negligible emission changes are observed upon addition of other reactive oxygen species. The chemoprobe 1 shows high sensitivity, having the low detection limit of ∼1.0 × 10-7 M. Furthermore, the fluorescent chemoprobe exhibits low cytotoxicity and is effectively applied to bioimaging of hydroxyl radicals by two-photon confocal microscopy in HeLa cells. These results indicate that the new chemoprobe has great potential for bioimaging in vivo and in vitro systems.
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Affiliation(s)
- Na Young Lim
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea
| | - Junho Ahn
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea.,Composites Research Division, Korea Institute of Materials Science, 797 Changwondaero, Changwon, Gyeongnam 51508, South Korea
| | - Miae Won
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Wonjin Choi
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea
| | - Jong Seung Kim
- Department of Chemistry, Korea University, Seoul 02841, Korea
| | - Jong Hwa Jung
- Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Korea
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15
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Bleve V, Franchi P, Konstanteli E, Gualandi L, Goldup SM, Mezzina E, Lucarini M. Synthesis and Characterisation of a Paramagnetic [2]Rotaxane Based on a Crown Ether-Like Wheel Incorporating a Nitroxide Motif. Chemistry 2017; 24:1198-1203. [DOI: 10.1002/chem.201704969] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Valentina Bleve
- Department of Chemistry “Giacomo. Ciamician”; University of Bologna; Via S. Giacomo 11 40126 Bologna Italy
| | - Paola Franchi
- Department of Chemistry “Giacomo. Ciamician”; University of Bologna; Via S. Giacomo 11 40126 Bologna Italy
| | - Evangelia Konstanteli
- Department of Chemistry “Giacomo. Ciamician”; University of Bologna; Via S. Giacomo 11 40126 Bologna Italy
- Nationaland Kapodistria; University of Athens; Greece
| | - Lorenzo Gualandi
- Department of Chemistry “Giacomo. Ciamician”; University of Bologna; Via S. Giacomo 11 40126 Bologna Italy
| | - Stephen M. Goldup
- Department of Chemistry; University of Southampton; Southampton SO17 1BJ UK
| | - Elisabetta Mezzina
- Department of Chemistry “Giacomo. Ciamician”; University of Bologna; Via S. Giacomo 11 40126 Bologna Italy
| | - Marco Lucarini
- Department of Chemistry “Giacomo. Ciamician”; University of Bologna; Via S. Giacomo 11 40126 Bologna Italy
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16
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Bai X, Huang Y, Lu M, Yang D. HKOH-1: A Highly Sensitive and Selective Fluorescent Probe for Detecting Endogenous Hydroxyl Radicals in Living Cells. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705873] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaoyu Bai
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Yueyang Huang
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Mingyang Lu
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Dan Yang
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
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17
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Bai X, Huang Y, Lu M, Yang D. HKOH-1: A Highly Sensitive and Selective Fluorescent Probe for Detecting Endogenous Hydroxyl Radicals in Living Cells. Angew Chem Int Ed Engl 2017; 56:12873-12877. [DOI: 10.1002/anie.201705873] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Xiaoyu Bai
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Yueyang Huang
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Mingyang Lu
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
| | - Dan Yang
- Morningside Laboratory for Chemical Biology; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong P. R. China
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18
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Allen JP, Pfrunder MC, McMurtrie JC, Bottle SE, Blinco JP, Fairfull‐Smith KE. BODIPY‐Based Profluorescent Probes Containing
Meso
‐ and β‐Substituted Isoindoline Nitroxides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601280] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jesse P. Allen
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Michael C. Pfrunder
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - John C. McMurtrie
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Steven E. Bottle
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - James P. Blinco
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Kathryn E. Fairfull‐Smith
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
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19
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Photoinduced Copolymerization of APMP-MMA: The Role of Reactive Hindered Amine APMP. INT J POLYM SCI 2016. [DOI: 10.1155/2016/5368602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
4-Acryloyl-1,2,2,6,6-pentamethyl-piperidinol (APMP) is a reactive hindered amine that prolongs the service life of the polymeric materials and exhibits high stability, good resistance to extraction, and low toxicity. In this paper, a photoinduced free radical copolymerization of APMP and methyl methacrylate (MMA) is accomplished at ambient temperature in solution. APMP plays a key role in the copolymerization, owing to the nitroxides generated in situ from the moiety of 1,2,2,6,6-pentamethyl-piperidine under UV irradiation, and mediates the copolymerization, which is confirmed by the linear kinetics. With the increment of initial monomer feed ratios of APMP/MMA, both the copolymerization rate and the average molecular weight increase. According to the reactivity ratios from the extended Kelen-Tüdos (KT) method at high conversion by1H NMR spectroscopy, a nonlinear model is established and the sequential distribution in the copolymers is also investigated. The dispersion of APMP units is regulated by the feed ratios and reactivity ratios.
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