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Zhu Z, Liu X, Li P, Wang H, Zhang Y, Liu M, Ren J. Renal Clearable Quantum Dot-Drug Conjugates Modulate Labile Iron Species and Scavenge Free Radicals for Attenuating Chemotherapeutic Drug-Induced Acute Kidney Injury. ACS APPLIED MATERIALS & INTERFACES 2023; 15:21854-21865. [PMID: 37115671 DOI: 10.1021/acsami.3c00714] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Chemotherapeutic drug-induced acute kidney injury (AKI) involves pathologically increased labile iron species in the kidneys that mediate the excessive generation of reactive oxygen species (ROS) to induce ferroptosis and apoptosis, subsequently driving renal dysfunction. Herein, we report renal clearable quantum dot-drug conjugates (QDCs) composed of carbon quantum dot (CDs), deferoxamine (DFO), and poly(ethylene glycol) (PEG) for attenuating chemotherapeutic drug-induced AKI. The CDs component in QDCs can not only provide DFO with high renal specificity to effectively remove the pathological labile iron species in the kidneys to block the source of ROS generation but also exert high antioxidative effects to avoid renal oxidative damage caused by the ROS that have been overproduced. In cisplatin-induced AKI mice, QDCs can inhibit ferroptosis and apoptosis with high efficacy for AKI treatment. This study will provide a new paradigm to realize enhanced therapeutic efficacy for AKI by simultaneously removing the pathological labile iron species and eliminating overproduced ROS in the kidneys to achieve the goal of addressing both symptoms and root causes.
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Affiliation(s)
- Zitong Zhu
- State Key Laboratory of Rare Earth Resources Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, P. R. China
| | - Xinchen Liu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Hospital of Stomatology, Jilin University, Changchun 130021, Jilin, P. R. China
| | - Penghui Li
- State Key Laboratory of Rare Earth Resources Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Huan Wang
- State Key Laboratory of Rare Earth Resources Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Yanjie Zhang
- State Key Laboratory of Rare Earth Resources Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, P. R. China
| | - Mengmeng Liu
- State Key Laboratory of Rare Earth Resources Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, P. R. China
| | - Jinsong Ren
- State Key Laboratory of Rare Earth Resources Utilization and Laboratory of Chemical Biology, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, P. R. China
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Effect of prooxidants and chelator Desferal on the oxidative status and sperm motility of Muscovy semen. Toxicol Rep 2022; 9:276-283. [PMID: 35256999 PMCID: PMC8897696 DOI: 10.1016/j.toxrep.2022.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 12/14/2021] [Accepted: 02/06/2022] [Indexed: 11/24/2022] Open
Abstract
Muscovy duck semen is vulnerable to oxidative damage. Sperm motility was impaired by the prooxidants regardless extender used. The metal chelator Desferal reduced sperm lipid peroxidation. Desferal did not affect motility impaired by prooxidants application.
This study aimed to establish the sensitivity of Muscovy duck semen to oxidative stress (OS) and the effect of Desferal, applied as an antioxidant. The effect of three prooxidant systems in presence and absence of Desferal were tested on the motility and kinetic parameters (determined using CASA system), as well as the level of lipid peroxidation (LPO) and glutathione (tGSH) of Muscovy semen. The semen was diluted (1:3 v/v) with four extenders (saline solution, IMV Canadyl, HIA-1, and AU) and stored at 4 °C for 6 h. The cooled semen was divided into aliquots (50 × 106 sperm cells/mL), which were incubated at 37 °C for 30 min with one of the following prooxidative agents: ferrous sulfate (FeSO4, 0.1 mM), hydrogen peroxide (H2O2, 1 mM), and Fenton system (FeSO4(Fe2+), 0.1 mM + H2O2, 1 mM), in the presence or absence of Desferal (0.1 mM). The addition of FeSO4 + H2O2 or FeSO4 regardless of the used extender, as well as the addition of H2O2 to the diluted semen with saline solution significantly increased the levels of LPO (P < 0.05). With the lowest prooxidant effect was H2O2. The application of Desferal reduced significantly (P < 0.05) the LPO levels induced by FeSO4 + H2O2 or FeSO4 and in a weaker degree by H2O2. Among all prooxidants, FeSO4 + H2O2 decreased in the greatest extent the tGSH concentration in semen diluted with each used extenders in comparison to the relevant control. The addition of Desferal in semen diluted with HIA-1 extender and incubated with FeSO4, and H2O2, showed the best restoration of tGSH level, close to that of respectively controls. The studied prooxidants significantly reduced total, progressive, and kinetic sperm motility (P < 0.05). Although the inclusion of Desferal reduced the sperm OS, it did not improve the impaired by OS sperm motility.
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Herskovitz JE, Goddard JM. Antioxidant functionalization of biomaterials via reactive extrusion. J Appl Polym Sci 2021. [DOI: 10.1002/app.50591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Julie M. Goddard
- Department of Food Science Cornell University Ithaca New York USA
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Kim H, Kim S, Kim M, Lee C, Yang I, Nam SJ. Bioactive natural products from the genus Salinospora: a review. Arch Pharm Res 2020; 43:1230-1258. [PMID: 33237436 DOI: 10.1007/s12272-020-01288-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/13/2020] [Indexed: 12/29/2022]
Abstract
Actinomycetes are an important source for bioactive secondary metabolites. Among them, the genus Salinispora is one of the first salt obligatory marine species worldwide and is typically found in various types of substrates in tropical and subtropical marine environments including sediments and marine organisms. This genus produces a wide range of chemical scaffolds and bioactive compounds such as lomaiviticins, cyclomarins, rifamycins, salinaphthoquinones, and salinosporamides. This review arranged Salinispora derived secondary metabolites according to the three species that comprise the genus. Moreover, muta- and semi-synthesis analogs derived from salinosporamide were also described in this review.
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Affiliation(s)
- Haerin Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Sohee Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Minju Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Chaeyoung Lee
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Inho Yang
- Department of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Pusan, 49112, Korea.
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea.
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Park SM, Li Q, Ryu MO, Nam A, An JH, Yang JI, Kim SM, Song WJ, Youn HY. Preconditioning of canine adipose tissue-derived mesenchymal stem cells with deferoxamine potentiates anti-inflammatory effects by directing/reprogramming M2 macrophage polarization. Vet Immunol Immunopathol 2019; 219:109973. [PMID: 31765882 DOI: 10.1016/j.vetimm.2019.109973] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/01/2019] [Accepted: 11/03/2019] [Indexed: 12/14/2022]
Abstract
Preconditioning with hypoxia or hypoxia-mimetic agents has been tried with mesenchymal stem cells (MSCs) to improve the secretion of anti-inflammatory factors. These preconditioning procedures upregulate hypoxia inducible factor (HIF) 1-alpha leading to the transcription of HIF-dependent tissue protective and anti-inflammatory genes. Due to the limited number of studies exploring the activity of deferoxamine (DFO)-a hypoxia-mimetic agent-in MSCs, we aimed to determine whether DFO can enhance the secretion of anti-inflammatory substances in canine adipose tissue-derived (cAT)-MSCs. Furthermore, we investigated whether this activity of DFO could affect macrophage polarization and activate anti-inflammatory reactions. cAT-MSCs preconditioned with DFO exhibited enhanced secretion of anti-inflammatory factors such as prostaglandin E2 and tumor necrosis factor-α-stimulated gene-6. To evaluate the interaction between DFO preconditioned cAT-MSCs and macrophages, RAW 264.7 cells were co-cultured with cAT-MSCs using the Transwell system, and changes in the expression of factors related to macrophage polarization were analyzed using the quantitative real-time PCR and western blot assays. When RAW 264.7 cells were co-cultured with DFO preconditioned cAT-MSCs, the expression of M1 and M2 markers decreased and increased, respectively, compared to co-culturing with non-preconditioned cAT-MSCs. Thus, cAT-MSCs preconditioned with DFO can more effectively direct and reprogram macrophage polarization into the M2 phase, an anti-inflammatory state.
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Affiliation(s)
- Su-Min Park
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Qiang Li
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Min-Ok Ryu
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Aryung Nam
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Ju-Hyun An
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Ji-In Yang
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang-Min Kim
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
| | - Woo-Jin Song
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea.
| | - Hwa-Young Youn
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea.
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Ser HL, Ab Mutalib NS, Yin WF, Chan KG, Goh BH, Lee LH. Evaluation of Antioxidative and Cytotoxic Activities of Streptomyces pluripotens MUSC 137 Isolated from Mangrove Soil in Malaysia. Front Microbiol 2015; 6:1398. [PMID: 26733951 PMCID: PMC4679926 DOI: 10.3389/fmicb.2015.01398] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/24/2015] [Indexed: 12/30/2022] Open
Abstract
Streptomyces pluripotens MUSC 137 was isolated from mangrove soil obtained from Tanjung Lumpur, Pahang, Malaysia. We investigated the phylogenetic, genomic, biochemical, and phenotypic characteristics of this strain. Uniquely adapted microorganisms from mangrove habitats have previously yielded compounds of biopharmaceutical interest. In order to examine the bioactivities possessed by the strain, fermentation extract was prepared through solvent extraction method prior to bioactivities screenings. Antioxidant activity was examined via DPPH assay while the cytotoxic effect was assessed by means of examining the activity of the extract against selected human cancer cell lines, namely colon cancer cells (HCT-116, Caco-2, SW480, and HT-29), breast cancer cell (MCF-7), lung cancer cell (A549), prostate cancer cell (DU145), and cervical cancer cell (Ca Ski). The results revealed MUSC 137 possesses significant antioxidant activity and demonstrates cytotoxic effect against several cancer cell lines tested. The results indicated MCF-7 cells were most susceptible to the extract with the lowest IC50 (61.33 ± 17.10 μg/mL), followed by HCT-116 and A549. Additionally, selective index (SI) showed that MUSC 137 extract was less toxic against normal cell lines when compared to MCF-7 and HCT-116 cells. The extract was further subjected to chemical analysis using GC–MS and revealed the presence of deferoxamine and pyrrolizidines related compounds which may account for the antioxidant and cytotoxic properties observed.
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Affiliation(s)
- Hooi-Leng Ser
- Biomedical Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia Bandar Sunway, Malaysia
| | - Nurul-Syakima Ab Mutalib
- UKM Medical Molecular Biology Institute-UKM Medical Centre, Universiti Kebangsaan Malaysia Kuala Lumpur, Malaysia
| | - Wai-Fong Yin
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya Kuala Lumpur, Malaysia
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya Kuala Lumpur, Malaysia
| | - Bey-Hing Goh
- Biomedical Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia Bandar Sunway, Malaysia
| | - Learn-Han Lee
- Biomedical Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia Bandar Sunway, Malaysia
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Roman MJ, Decker EA, Goddard JM. Performance of Nonmigratory Iron Chelating Active Packaging Materials in Viscous Model Food Systems. J Food Sci 2015. [PMID: 26220302 DOI: 10.1111/1750-3841.12972] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Many packaged food products undergo quality deterioration due to iron promoted oxidative reactions. Recently, we have developed a nonmigratory iron chelating active packaging material that represents a novel approach to inhibit oxidation of foods while addressing consumer demands for "cleanˮ labels. A challenge to the field of nonmigratory active packaging is ensuring that surface-immobilized active agents retain activity in a true food system despite diffusional limitations. Yet, the relationship between food viscosity and nonmigratory active packaging activity retention has never been characterized. The objective of this study was to investigate the influence of food viscosity on iron chelation by a nonmigratory iron chelating active packaging material. Methyl cellulose was added to aqueous buffered iron solutions to yield model systems with viscosities ranging from ∼1 to ∼10(5) mPa·s, representing viscosities ranging from beverage to mayonnaise. Iron chelation was quantified by material-bound iron content using colorimetry and inductively coupled plasma-optical emission spectrometry (ICP-OES). Maximum iron chelation was reached in solutions up to viscosity ∼10(2) mPa·s. In more viscous solutions (up to ∼10(4) mPa·s), there was a significant decrease in iron chelating capacity (P < 0.05). However, materials still retained at least 76% iron chelating capacity. Additionally, the influence of different food hydrocolloids on the performance of nonmigratory iron chelating active packaging was characterized. Methyl cellulose and carrageenan did not compete with the material for specific iron chelation (P > 0.05). Materials retained 32% to 45% chelating capacity when in contact with competitively chelating hydrocolloids guar gum, locust bean gum, and xanthan gum. This work demonstrates the potential application of nonmigratory iron chelating active packaging in liquid and semi-liquid foods to allow for the removal of synthetic chelators, while maintaining food quality.
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Affiliation(s)
- Maxine J Roman
- Dept. of Food Science, Univ. of Massachusetts, 102 Holdsworth Way, Amherst, Mass, 01003, U.S.A
| | - Eric A Decker
- Dept. of Food Science, Univ. of Massachusetts, 102 Holdsworth Way, Amherst, Mass, 01003, U.S.A.,Bioactive Natural Products Research Group, Dept. of Biochemistry, Faculty of Science, King Abdulaziz Univ, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Julie M Goddard
- Dept. of Food Science, Univ. of Massachusetts, 102 Holdsworth Way, Amherst, Mass, 01003, U.S.A
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Pharmacologic IKK/NF-κB inhibition causes antigen presenting cells to undergo TNFα dependent ROS-mediated programmed cell death. Sci Rep 2014; 4:3631. [PMID: 24406986 PMCID: PMC3887388 DOI: 10.1038/srep03631] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 12/13/2013] [Indexed: 01/14/2023] Open
Abstract
Monocyte-derived antigen presenting cells (APC) are central mediators of the innate and adaptive immune response in inflammatory diseases. As such, APC are appropriate targets for therapeutic intervention to ameliorate certain diseases. APC differentiation, activation and functions are regulated by the NF-κB family of transcription factors. Herein, we examined the effect of NF-κB inhibition, via suppression of the IκB Kinase (IKK) complex, on APC function. Murine bone marrow-derived macrophages and dendritic cells (DC), as well as macrophage and DC lines, underwent rapid programmed cell death (PCD) after treatment with several IKK/NF-κB inhibitors through a TNFα-dependent mechanism. PCD was induced proximally by reactive oxygen species (ROS) formation, which causes a loss of mitochondrial membrane potential and activation of a caspase signaling cascade. NF-κB-inhibition-induced PCD of APC may be a key mechanism through which therapeutic targeting of NF-κB reduces inflammatory pathologies.
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Deferoxamine blocks death induced by glutathione depletion in PC 12 cells. Neurotoxicology 2013; 37:221-30. [PMID: 23680049 DOI: 10.1016/j.neuro.2013.04.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 03/21/2013] [Accepted: 04/26/2013] [Indexed: 11/22/2022]
Abstract
The purpose of the present work was to investigate the mechanisms by which glutathione depletion induced by treatment with buthionine sulfoximine (BSO) led within 24-30 h to PC 12 cells apoptosis. Our results showed that treatment by relatively low concentrations (10-30 μM) of deferoxamine (DFx), a natural iron-specific chelator, almost completely shielded the cells from BSO-induced toxicity and that DFx still remained protective when added up to 9-12h after BSO treatment. On the other hand, phosphopeptides derived from milk casein and known to carry iron across cell membranes, markedly potentiated the toxic action of BSO when loaded with iron but were ineffective in sodium form. Kept for 24 h in serum-free medium, the cells underwent a decrease in glutathione content after BSO treatment, but remained viable. However, these BSO-pre-treated cells showed a rapid (90-120 min) decrease in cell viability when incubated with low doses of iron, whereas a great proportion of them remained viable in the presence of higher concentrations of copper and zinc. We also observed in PC 12 cells an early (4-8 h) and transient increase in the expression of ferritin subunits following BSO addition. Taken together these results suggest that BSO-induced glutathione depletion leads to an alteration of cellular iron homeostasis, which may contribute to its toxicity.
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Abstract
Haeme oxygenase-1 (HO-1) is often viewed as a cytoprotective gene. Toxic heavy metals induce HO-1, but it is unclear whether particular metal micronutrients also induce HO-1. Hence, the ability of exogenously-added copper, iron and zinc to influence HO-1 expression in HCT-116 cells was evaluated. Under the chosen experimental conditions, only zinc noticeably increased the expression of HO-1 mRNA and protein. Concurrently, zinc decreased non-protein thiol levels to a certain extent, but zinc did not increase the production of reactive oxygen species (ROS). Moreover, ascorbate and Trolox did not inhibit zinc-induced HO-1 upregulation. In contrast, deferoxamine blunted the induction of HO-1 mRNA, protein, and enzymatic activity caused by zinc. Additionally, N-acetylcysteine and Tiron inhibited zinc-induced HO-1 upregulation and also nuclear translocation of nuclear factor erythroid 2-related factor 2 (Nrf2). Collectively, these findings suggest that zinc at above normal levels upregulates HO-1 expression in HCT-116 cells in a ROS-independent manner.
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Affiliation(s)
- Abigail F Smith
- Cellular and Molecular Nutrition Research Laboratory, Department of Nutrition, University of North Carolina at Greensboro, Greensboro, NC 27412, USA
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Wellwood CRL, Cole RA. Relevance of carnosic acid concentrations to the selection of rosemary, Rosmarinus officinalis (L.), accessions for optimization of antioxidant yield. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2004; 52:6101-6107. [PMID: 15453673 DOI: 10.1021/jf035335p] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Methods were developed to identify and select accessions of rosemary, Rosmarinus officinalis (L.), producing optimum antioxidant activity. Extracts from 12 different rosemary accessions, using three solvents of varying polarity, were assayed for their antioxidant activity, and their major antioxidant compounds were identified and quantified by high-performance liquid chromatography (HPLC). Carnosic acid concentrations were correlated with (i) the free radical scavenging activity of these extracts, as measured by the 2,2-diphenyl-1-picrylhydrazyl assay (adjusted R(2) = 77.3%) and (ii) their inhibition of linoleic acid oxidation, as measured by the beta-carotene assay (adjusted R(2) = 44.1%). The correlation was broadly confirmed by the production of volatile aldehydes as measured by the hexanal assay. The variation of carnosic acid concentrations in extracts of 29 accessions, grown in field trials at three sites in England, was determined.
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Affiliation(s)
- Carol R L Wellwood
- The National Herb Centre, Banbury Road, Warmington, nr. Banbury, Oxfordshire OX17 1DF, United Kingdom.
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12
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Kosáry J, Takács M, Siró I. Intensive test for studying lipid peroxidation. ACTA ALIMENTARIA 2002. [DOI: 10.1556/aalim.31.2002.1.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sarco DP, Becker J, Palmer C, Sheldon RA, Ferriero DM. The neuroprotective effect of deferoxamine in the hypoxic-ischemic immature mouse brain. Neurosci Lett 2000; 282:113-6. [PMID: 10713409 DOI: 10.1016/s0304-3940(00)00878-8] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The iron chelator deferoxamine is efficacious in ameliorating hypoxic-ischemic brain injury in some models, perhaps by decreasing oxidative stress. Transgenic copper/zinc superoxide dismutase-1 (SOD1) overexpression in neonatal mice increases brain injury after hypoxia-ischemia compared to non-transgenic wildtype littermates because of increased oxidative stress. A neonatal mouse model of hypoxia-ischemia was used to examine histopathological damage, iron histochemistry and free iron concentration in the brains of SOD1 transgenic and non-transgenic littermates. Deferoxamine significantly decreased injury in non-transgenics compared to controls with a trend toward neuroprotection in the transgenics. There was no difference in free iron concentrations in the brains of SOD1 overexpressors or non-transgenics. Deferoxamine may protect the neonatal brain by a number of anti-oxidant mechanisms including iron chelation, enhancement of stress gene expression, or induction of other factors responsible for neuroprotection.
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Affiliation(s)
- D P Sarco
- Neonatal Brain Disorders Laboratory, Departments of Neurology, University of California-San Francisco, San Francisco, USA
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15
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Zhu BZ, Har-El R, Kitrossky N, Chevion M. New modes of action of desferrioxamine: scavenging of semiquinone radical and stimulation of hydrolysis of tetrachlorohydroquinone. Free Radic Biol Med 1998; 24:360-9. [PMID: 9433912 DOI: 10.1016/s0891-5849(97)00220-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Desferrioxamine (DFO) is a common drug used in the treatment of iron overload. In addition to its iron-chelation, other properties have been identified. Alas, DFO has demonstrable effects which cannot be explained by its classically established properties; i.e., DFO protects against DNA single strand breaks induced by tetrachlorohydroquinone (TCHQ), while other iron chelators such as DTPA (diethylenetriaminepentaacetic acid) do not. The autooxidation process of TCHQ yielding the tetrachlorosemiquinone radical (TCSQ.) intermediate, was studied here in the presence of chelators. DFO led to a marked reduction in both concentration and life span of TCSQ. via formation of DFO-nitroxide radical (DFO.). In contrast, DTPA had no detectable effect on TCHQ autooxidation. Present studies indicate that the protective effects of DFO on TCHQ-induced DNA damage were not due to the binding of iron, but rather to scavenging of the reactive TCSQ. and the formation of the less reactive DFO.. An additional mode of action of DFO was identified, via stimulation of the hydrolysis (dechlorination) of tetrachloro-1,4-benzoquinone (chloranil), which is the oxidation product of TCHQ, to form 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone (chloranilic acid). The results of this study demonstrate two new modes of action for DFO: the scavenging of deleterious semiquinone radical, and the stimulation of the hydrolysis of halogenated substituents on the quinone structure. Both modes might prove highly relevant to the biological activities of DFO.
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Affiliation(s)
- B Z Zhu
- Department of Cellular Biochemistry, Hebrew University-Hadassah School of Medicine, Jerusalem, Israel
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