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Zhao W, He Z, Yang X, Yu Y, Baell JB, Huang F. Visible-Light-Induced Synthesis of 3-Alkyl Chromones under Catalyst- and Additive-Free Conditions. J Org Chem 2023; 88:13634-13644. [PMID: 37679947 DOI: 10.1021/acs.joc.3c01339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Herein, we reported an efficient and facile visible-light-induced 3-alkyl chromone synthesis from easily accessible o-hydroxyaryl enaminones and α-diazo esters. In this protocol, excellent yields were obtained with a broad substrate scope at room temperature, tolerating various functional groups. Of note is that this eco-friendly methodology features catalyst- and additive-free, mild reaction conditions, simple operation procedure, and easy scale-up, which affords a convenient pathway for the preparation of 3-alkyl chromones. Experimental results and density functional theory (DFT) computation analyses confirm the participation of carbene species and active cyclopropane intermediate.
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Affiliation(s)
- Wei Zhao
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Zhiqin He
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Xiaohui Yang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Fei Huang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China
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2
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Cerebral Iron Deposition in Neurodegeneration. Biomolecules 2022; 12:biom12050714. [PMID: 35625641 PMCID: PMC9138489 DOI: 10.3390/biom12050714] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 02/04/2023] Open
Abstract
Disruption of cerebral iron regulation appears to have a role in aging and in the pathogenesis of various neurodegenerative disorders. Possible unfavorable impacts of iron accumulation include reactive oxygen species generation, induction of ferroptosis, and acceleration of inflammatory changes. Whole-brain iron-sensitive magnetic resonance imaging (MRI) techniques allow the examination of macroscopic patterns of brain iron deposits in vivo, while modern analytical methods ex vivo enable the determination of metal-specific content inside individual cell-types, sometimes also within specific cellular compartments. The present review summarizes the whole brain, cellular, and subcellular patterns of iron accumulation in neurodegenerative diseases of genetic and sporadic origin. We also provide an update on mechanisms, biomarkers, and effects of brain iron accumulation in these disorders, focusing on recent publications. In Parkinson’s disease, Friedreich’s disease, and several disorders within the neurodegeneration with brain iron accumulation group, there is a focal siderosis, typically in regions with the most pronounced neuropathological changes. The second group of disorders including multiple sclerosis, Alzheimer’s disease, and amyotrophic lateral sclerosis shows iron accumulation in the globus pallidus, caudate, and putamen, and in specific cortical regions. Yet, other disorders such as aceruloplasminemia, neuroferritinopathy, or Wilson disease manifest with diffuse iron accumulation in the deep gray matter in a pattern comparable to or even more extensive than that observed during normal aging. On the microscopic level, brain iron deposits are present mostly in dystrophic microglia variably accompanied by iron-laden macrophages and in astrocytes, implicating a role of inflammatory changes and blood–brain barrier disturbance in iron accumulation. Options and potential benefits of iron reducing strategies in neurodegeneration are discussed. Future research investigating whether genetic predispositions play a role in brain Fe accumulation is necessary. If confirmed, the prevention of further brain Fe uptake in individuals at risk may be key for preventing neurodegenerative disorders.
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Hofer T. Oxidative Stress in Human Toxicology. Antioxidants (Basel) 2021; 10:antiox10081159. [PMID: 34439406 PMCID: PMC8388969 DOI: 10.3390/antiox10081159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 07/16/2021] [Indexed: 11/25/2022] Open
Affiliation(s)
- Tim Hofer
- Department of Environmental Health, Norwegian Institute of Public Health, P.O. Box 222 Skøyen, N-0213 Oslo, Norway
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4
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Boronate affinity imprinted hydrogel sorbent from biphasic synergistic high internal phase emulsions reactor for specific enrichment of Luteolin. J Colloid Interface Sci 2021; 601:782-792. [PMID: 34107316 DOI: 10.1016/j.jcis.2021.05.165] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 11/20/2022]
Abstract
The dynamic coexistence of heterostructures is crucial for the synergistic function of molecularly imprinted polymers (MIPs) derived from high internal phase emulsions (HIPEs). In this work, hydrophilic boronate affinity imprinted hydrogel sorbents (H-UIO-66-NH2-IHIPEs) were prepared by biphasic synergistic HIPEs droplet reactors filled with reactive microencapsulation system, and used to capture and separate cis-diol containing luteolin (LTL) from complex extraction samples with high selectivity. As the main solid emulsifier, UiO-66-NH2, prototype zirconium-based metal-organic frameworks (MOFs) greatly improves the mechanical performance of the hydrogel, whilst preventing overuse of surfactants. Space-confined formation of imprinted sites in the external phase is realized in the presence of hydrophilic acrylamide phenylboric acid monomer (H-BA), which endows the specific affinity with pH responsiveness to LTL. In addition, the filled microinclusion compound containing elastic monomer octadecyl methacrylate (SMA) and functional monomer glycidyl methacrylate (GMA) simultaneously added interfacial cross-linking reaction to provide stable pore volume and pore shape. Combined with these excellent properties, H-UIO-66-NH2-IHIPEs showed fast capture kinetics (75 min) and large uptake amount (39.77 mg g-1) at 298 K, and confirmed the existence of a uniform chemisorption monolayer. Moreover, excellent recyclability of 6.24% loss in adsorption amount after five adsorption-desorption cycles was observed. Finally, the LTL content of the purified product (about 97.38%) was higher than that of the crude extract (about 85.0%). This study sheds a new light for the design of novel imprinted hydrogel sorbents combined with binary synergistic components.
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Malacaria L, Corrente GA, Beneduci A, Furia E, Marino T, Mazzone G. A Review on Coordination Properties of Al(III) and Fe(III) toward Natural Antioxidant Molecules: Experimental and Theoretical Insights. Molecules 2021; 26:molecules26092603. [PMID: 33946938 PMCID: PMC8124610 DOI: 10.3390/molecules26092603] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/24/2022] Open
Abstract
This review focuses on the ability of some natural antioxidant molecules (i.e., hydroxycinnamic acids, coumarin-3-carboxylic acid, quercetin, luteolin and curcumin) to form Al(III)- and Fe(III)-complexes with the aim of evaluating the coordination properties from a combined experimental and theoretical point of view. Despite the contributions of previous studies on the chemical properties and biological activity of these metal complexes involving such natural antioxidants, further detailed relationships between the structure and properties are still required. In this context, the investigation on the coordination properties of Al(III) and Fe(III) toward these natural antioxidant molecules might deserve high interest to design water soluble molecule-based metal carriers that can improve the metal’s intake and/or its removal in living organisms.
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Liu S, Zhu Y, Liu N, Fan D, Wang M, Zhao Y. Antioxidative Properties and Chemical Changes of Quercetin in Fish Oil: Quercetin Reacts with Free Fatty Acids to Form Its Ester Derivatives. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:1057-1067. [PMID: 33440930 DOI: 10.1021/acs.jafc.0c07273] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this research, we studied the antioxidative properties and chemical changes of quercetin in fish oil during accelerated storage at 60 °C for 5 days. Gas chromatography (GC) analysis showed that quercetin inhibited aldehyde formation and unsaturated fatty acid oxidation in fish oil significantly; however, the inhibitory effects decreased gradually with prolonged heating time. Moreover, quercetin was consumed with increasing heating time. Some new phenolic derivatives were discovered in the fish oil with quercetin, with their structures fully elucidated by LC-MS/MS and comparison with newly synthesized ones (characterized by MS and NMR spectroscopy). Based on their chemical structures, we proposed that quercetin reacted with EPA and DHA to form the corresponding quercetin fatty acid esters in fish oil. In addition, the newly formed quercetin-3-O-eicosapentaenoate and quercetin-3-O-docosahexaenoate showed weaker DPPH and ABTS radical cation scavenging activity but much improved lipophilicity, higher cell membrane affinity, and hence enhanced cellular antioxidant activity compared with the parent quercetin. Overall, quercetin could be used as a safe dietary polyphenol to inhibit lipid oxidation. The newly formed quercetin-polyunsaturated fatty acid esters may render improved bioactivity to humans, which needs further investigation.
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Affiliation(s)
- Shaojun Liu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
| | - Yamin Zhu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
| | - Ning Liu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
| | - Daming Fan
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Mingfu Wang
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
- School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Yueliang Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai 201306, China
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Berntsen HF, Duale N, Bjørklund CG, Rangel-Huerta OD, Dyrberg K, Hofer T, Rakkestad KE, Østby G, Halsne R, Boge G, Paulsen RE, Myhre O, Ropstad E. Effects of a human-based mixture of persistent organic pollutants on the in vivo exposed cerebellum and cerebellar neuronal cultures exposed in vitro. ENVIRONMENT INTERNATIONAL 2021; 146:106240. [PMID: 33186814 DOI: 10.1016/j.envint.2020.106240] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/25/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
Exposure to persistent organic pollutants (POPs), encompassing chlorinated (Cl), brominated (Br) and perfluoroalkyl acid (PFAA) compounds is associated with adverse neurobehaviour in humans and animals, and is observed to cause adverse effects in nerve cell cultures. Most studies focus on single POPs, whereas studies on effects of complex mixtures are limited. We examined the effects of a mixture of 29 persistent compounds (Cl + Br + PFAA, named Total mixture), as well as 6 sub-mixtures on in vitro exposed rat cerebellar granule neurons (CGNs). Protein expression studies of cerebella from in vivo exposed mice offspring were also conducted. The selection of chemicals for the POP mixture was based on compounds being prominent in food, breast milk or blood from the Scandinavian human population. The Total mixture and sub-mixtures containing PFAAs caused greater toxicity in rat CGNs than the single or combined Cl/Br sub-mixtures, with significant impact on viability from 500x human blood levels. The potencies for these mixtures based on LC50 values were Br + PFAA mixture > Total mixture > Cl + PFAA mixture > PFAA mixture. These mixtures also accelerated induced lipid peroxidation. Protection by the competitive N-methyl-D-aspartate (NMDA) receptor antagonist 3-((R)-2-Carboxypiperazin-4-yl)-propyl-1-phosphonic acid (CPP) indicated involvement of the NMDA receptor in PFAA and Total mixture-, but not Cl mixture-induced toxicity. Gene-expression studies in rat CGNs using a sub-toxic and marginally toxic concentration ((0.4 nM-5.5 µM) 333x and (1 nM-8.2 µM) 500x human blood levels) of the mixtures, revealed differential expression of genes involved in apoptosis, oxidative stress, neurotransmission and cerebellar development, with more genes affected at the marginally toxic concentration. The two important neurodevelopmental markers Pax6 and Grin2b were downregulated at 500x human blood levels, accompanied by decreases in PAX6 and GluN2B protein levels, in cerebellum of offspring mice from mothers exposed to the Total mixture throughout pregnancy and lactation. In rat CGNs, the glutathione peroxidase gene Prdx6 and the regulatory transmembrane glycoprotein gene Sirpa were highly upregulated at both concentrations. In conclusion, our results support that early-life exposure to mixtures of POPs can cause adverse neurodevelopmental effects.
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Affiliation(s)
- Hanne Friis Berntsen
- Department of Production Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway; National Institute of Occupational Health, P.O. Box 5330 Majorstuen, 0304 Oslo, Norway.
| | - Nur Duale
- Section of Molecular Toxicology, Norwegian Institute of Public Health, N-0403 Oslo, Norway.
| | - Cesilie Granum Bjørklund
- Department of Production Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway.
| | | | - Kine Dyrberg
- Department of Production Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway.
| | - Tim Hofer
- Section of Toxicology and Risk Assessment, Norwegian Institute of Public Health, N-0403, Oslo, Norway.
| | - Kirsten Eline Rakkestad
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, P.O. Box 1072, Blindern, NO-0316 Oslo, Norway.
| | - Gunn Østby
- Department of Production Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway.
| | - Ruth Halsne
- Department of Production Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway.
| | - Gudrun Boge
- Department of Companion Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway.
| | - Ragnhild Elisabeth Paulsen
- Section for Pharmacology and Pharmaceutical Biosciences, Department of Pharmacy, University of Oslo, P.O. Box 1072, Blindern, NO-0316 Oslo, Norway.
| | - Oddvar Myhre
- Section of Toxicology and Risk Assessment, Norwegian Institute of Public Health, N-0403, Oslo, Norway.
| | - Erik Ropstad
- Department of Production Animal Clinical Sciences, NMBU-School of Veterinary Science, P.O. Box 369 sentrum, N-0102 Oslo, Norway.
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9
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Li G, Zhou J, Sun M, Cen J, Xu J. Role of luteolin extracted from Clerodendrum cyrtophyllum Turcz leaves in protecting HepG2 cells from TBHP-induced oxidative stress and its cytotoxicity, genotoxicity. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104196] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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10
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Hogenkamp A, Ehlers A, Garssen J, Willemsen LEM. Allergy Modulation by N-3 Long Chain Polyunsaturated Fatty Acids and Fat Soluble Nutrients of the Mediterranean Diet. Front Pharmacol 2020; 11:1244. [PMID: 32973501 PMCID: PMC7472571 DOI: 10.3389/fphar.2020.01244] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 07/29/2020] [Indexed: 12/12/2022] Open
Abstract
The Mediterranean diet, containing valuable nutrients such as n-3 long chain poly-unsaturated fatty acids (LCPUFAs) and other fat-soluble micronutrients, is known for its health promoting and anti-inflammatory effects. Its valuable elements might help in the battle against the rising prevalence of non-communicable diseases (NCD), including the development of allergic diseases and other (chronic) inflammatory diseases. The fat fraction of the Mediterranean diet contains bioactive fatty acids but can also serve as a matrix to dissolve and increase the uptake of fat-soluble vitamins and phytochemicals, such as luteolin, quercetin, resveratrol and lycopene with known immunomodulatory and anti-inflammatory capacities. Especially n-3 LCPUFAs such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) derived from marine oils can target specific receptors or signaling cascades, act as eicosanoid precursors and/or alter membrane fluidity and lipid raft formation, hereby exhibiting anti-inflammatory properties. Beyond n-3 LCPUFAs, fat-soluble vitamins A, D, E, and K1/2 have the potential to affect pro-inflammatory signaling cascades by interacting with receptors or activating/inhibiting signaling proteins or phosphorylation in immune cells (DCs, T-cells, mast cells) involved in allergic sensitization or the elicitation/effector phase of allergic reactions. Moreover, fat-soluble plant-derived phytochemicals can manipulate signaling cascades, mostly by interacting with other receptors or signaling proteins compared to those modified by fat-soluble vitamins, suggesting potential additive or synergistic actions by applying a combination of these nutrients which are all part of the regular Mediterranean diet. Research concerning the effects of phytochemicals such as polyphenols has been hampered due to their poor bio-availability. However, their solubility and uptake are improved by applying them within the dietary fat matrix. Alternatively, they can be prepared for targeted delivery by means of pharmaceutical approaches such as encapsulation within liposomes or even unique nanoparticles. This review illuminates the molecular mechanisms of action and possible immunomodulatory effects of n-3 LCPUFAs and fat-soluble micronutrients from the Mediterranean diet in allergic disease development and allergic inflammation. This will enable us to further appreciate how to make use of the beneficial effects of n-3 LCPUFAs, fat-soluble vitamins and a selection of phytochemicals as active biological components in allergy prevention and/or symptom reduction.
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Affiliation(s)
- Astrid Hogenkamp
- Division of Pharmacology, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
| | - Anna Ehlers
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands.,Department of Dermatology/Allergology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Johan Garssen
- Division of Pharmacology, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands.,Global Centre of Excellence Immunology, Danone Nutricia Research B.V., Utrecht, Netherlands
| | - Linette E M Willemsen
- Division of Pharmacology, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, Netherlands
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11
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Hu Q, Sun H, Zhou X, Gong X, Xiao L, Liu L, Yang ZQ. Bright-yellow-emissive nitrogen-doped carbon nanodots as a fluorescent nanoprobe for the straightforward detection of glutathione in food samples. Food Chem 2020; 325:126946. [PMID: 32387942 DOI: 10.1016/j.foodchem.2020.126946] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 04/12/2020] [Accepted: 04/28/2020] [Indexed: 01/17/2023]
Abstract
In this work, a novel yellow-emissive nanoprobe was for the first time developed for the fast detection of glutathione (GSH) based on nitrogen-doped carbon nanodots (N-CNDs) prepared via hydrothermal heating of o-Phenylenediamine. The N-CNDs and GSH could form non-fluorescent complex via static interaction, resulting in the fluorescence quenching of N-CNDs. Under optimal conditions, the N-CNDs served as a fluorescent nanoprobe for GSH sensing in a straightforward way with high selectivity and sensitivity. Two good linear responses were found for GSH detection in concentration ranges of 0.1-1.0 μM and 1.0-220.0 μM, respectively. The corresponding detection limits are as low as 0.059 μM and 5.54 μM, respectively. Meanwhile, the proposed sensing system was successfully applied for GSH determination in vegetable and fruit samples with high accuracy. This work highlights the detection of GSH in a simple, fast, cost-effective, selective and ultrasensitive way, which paves a new way for other food quality monitoring.
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Affiliation(s)
- Qin Hu
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China
| | - Huijuan Sun
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China
| | - Xiaoyan Zhou
- College of Tourism and Cuisine, Yangzhou University, Yangzhou, Jiangsu 225001, PR China
| | - Xiaojuan Gong
- Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China
| | - Lixia Xiao
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.
| | - Lizhen Liu
- School of Chemistry and Environmental Engineering, Shanxi Datong University, Datong 037009, PR China
| | - Zhen-Quan Yang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225001, PR China.
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12
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Qian J, Lin Z, Wang Z, Peng Z, Wu L, Lu P, Wang Y. Copper-Carbene-Triggered Electrophilic Cyclization of o-Hydroxyarylenaminones with 3-Diazoindolin-2-imines: Synthesis of 3-Indolyl-4H-chromen-4-ones and Pyrido[2,3-b:6,5-b′]diindoles. J Org Chem 2019; 84:6395-6404. [DOI: 10.1021/acs.joc.9b00755] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Qian
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zhenwei Lin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zaibin Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zhixing Peng
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Li Wu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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13
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Deng SP, Yang YL, Cheng XX, Li WR, Cai JY. Synthesis, Spectroscopic Study and Radical Scavenging Activity of Kaempferol Derivatives: Enhanced Water Solubility and Antioxidant Activity. Int J Mol Sci 2019; 20:E975. [PMID: 30813425 PMCID: PMC6412309 DOI: 10.3390/ijms20040975] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 02/13/2019] [Accepted: 02/19/2019] [Indexed: 12/19/2022] Open
Abstract
Kaempferol (Kae) is a natural flavonoid with potent antioxidant activity, but its therapeutic use is limited by its low aqueous solubility. Here, a series of Kae derivatives were synthesized to improve Kae dissolution property in water and antioxidant activity. These compounds included sulfonated Kae (Kae-SO₃), gallium (Ga) complexes with Kae (Kae-Ga) and Kae-SO₃ (Kae-SO₃-Ga). The compound structures were characterized by high-resolution mass spectrometry (HRMS), nuclear magnetic resonance (NMR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and thermal methods (TG/DSC). The results showed that a sulfonic group (-SO₃) was successfully tethered on the C3' of Kae to form Kae-SO₃. And in the metal complexation, 4-CO and 3-OH of the ligand participated in the coordination with Ga(III). The metal-to-ligand ratio 1:2 was suggested for both complexes. Interestingly, Kae-SO₃-Ga was obviously superior to other compounds in terms of overcoming the poor water-solubility of free Kae, and the solubility of Kae-SO₃-Ga was about 300-fold higher than that of Kae-Ga. Furthermore, the evaluation of antioxidant activities in vitro was carried out for Kae derivatives by using α,α-diphenyl-β-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzo-thiazoline-6-sulfonic acid) diammonium salt (ABTS) free radical scavenging. The results showed that Kae-SO₃-Ga was also optimal for scavenging free radicals in a dose-dependent manner. These data demonstrate that sulfonate kaempferol-gallium complex has a promising future as a potential antioxidant and as a potential therapeutic agent for further biomedical studies.
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Affiliation(s)
- Sui-Ping Deng
- Department of Chemistry, Jinan University, Guangzhou 510632, China.
| | - Yi-Li Yang
- Department of Chemistry, Jinan University, Guangzhou 510632, China.
| | - Xing-Xing Cheng
- Department of Chemistry, Jinan University, Guangzhou 510632, China.
| | - Wen-Rong Li
- Department of Chemistry, Jinan University, Guangzhou 510632, China.
| | - Ji-Ye Cai
- Department of Chemistry, Jinan University, Guangzhou 510632, China.
- State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 000853, China.
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14
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Time-dependent effects of perfluorinated compounds on viability in cerebellar granule neurons: Dependence on carbon chain length and functional group attached. Neurotoxicology 2017; 63:70-83. [DOI: 10.1016/j.neuro.2017.09.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 08/11/2017] [Accepted: 09/12/2017] [Indexed: 11/17/2022]
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15
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Kellett ME, Greenspan P, Pegg RB. Modification of the cellular antioxidant activity (CAA) assay to study phenolic antioxidants in a Caco-2 cell line. Food Chem 2017; 244:359-363. [PMID: 29120793 DOI: 10.1016/j.foodchem.2017.10.035] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 10/08/2017] [Indexed: 02/06/2023]
Abstract
In vitro assays are widely used to analyze the antioxidant potential of compounds, but they cannot accurately predict antioxidant behavior in living systems. Cell-based assays, like the cellular antioxidant activity (CAA) assay, are gaining importance as they provide a biological perspective. When the CAA assay was employed to study phenolic antioxidants using hepatocarcinoma (HepG2) cells, quercetin showed antioxidant activity in HepG2 cells; 25 and 250μM quercetin reduced fluorescence by 17.1±0.9% and 58.6±2.4%, respectively. (+)-Catechin, a phenolic antioxidant present in many foods, bestowed virtually no CAA in HepG2 cells. When Caco-2 cells were employed, more robust antioxidant activity was observed; 50μM (+)-catechin and quercetin reduced fluorescence by 54.1±1.4% and 63.6±0.9%, respectively. Based on these results, likely due to differences in active membrane transport between the cell types, the Caco-2-based CAA assay appears to be a more appropriate method for the study of certain dietary phenolics.
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Affiliation(s)
- Mary E Kellett
- Department of Food Science & Technology, College of Agricultural and Environmental Sciences, The University of Georgia, 100 Cedar Street, Athens, GA 30602, United States
| | - Phillip Greenspan
- Department of Pharmaceutical & Biomedical Sciences, College of Pharmacy, The University of Georgia, 250 W. Green Street, Athens, GA 30602, United States
| | - Ronald B Pegg
- Department of Food Science & Technology, College of Agricultural and Environmental Sciences, The University of Georgia, 100 Cedar Street, Athens, GA 30602, United States.
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Dong H, Yang X, He J, Cai S, Xiao K, Zhu L. Enhanced antioxidant activity, antibacterial activity and hypoglycemic effect of luteolin by complexation with manganese(ii) and its inhibition kinetics on xanthine oxidase. RSC Adv 2017. [DOI: 10.1039/c7ra11036g] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
A coordination compound with enhanced biological activities was synthesized with luteolin and manganese(ii) cation. The inhibition effect assay found that the complex reversibly inhibited xanthine oxidase in a competitive manner.
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Affiliation(s)
- Hao Dong
- School of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Xiaocui Yang
- School of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Jiapeng He
- School of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Sheng Cai
- School of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Kaijun Xiao
- School of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Liang Zhu
- School of Food Science and Technology
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
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17
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Zhen JL, Chang YN, Qu ZZ, Fu T, Liu JQ, Wang WP. Luteolin rescues pentylenetetrazole-induced cognitive impairment in epileptic rats by reducing oxidative stress and activating PKA/CREB/BDNF signaling. Epilepsy Behav 2016; 57:177-184. [PMID: 26967006 DOI: 10.1016/j.yebeh.2016.02.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 02/01/2016] [Accepted: 02/02/2016] [Indexed: 12/14/2022]
Abstract
Most antiepileptic drugs (AEDs) interfere with cognitive function, and there is therefore an urgent need for AEDs that are effective but do not have this side effect. Various studies have reported the antiinflammatory and cytoprotective properties of the natural flavonoid luteolin (LU); however, none has examined systematically its antiseizure potential. The current study investigated the effects of LU on pentylenetetrazole (PTZ)-induced cognitive impairment in rats and the underlying mechanisms. Seizures were induced in rats by daily injection of PTZ for 36 days. Two other groups were pretreated with LU (50 or 100 mg/kg/day by oral administration) 30 min prior to PTZ administration. Seizure severity was scored, and cognitive function was tested in the Morris water maze. Neuronal damage, mitochondrial generation of reactive oxygen species, oxidative stress, phosphoactivation of the protein kinase A (PKA)-cyclic AMP response element-binding protein (CREB) pathway, and brain-derived neurotrophic factor (BDNF) expression were measured in the hippocampus. Pretreatment with LU suppressed seizure induction, duration, and severity following PTZ injection, reversed cognitive impairment, reduced neuronal and oxidative stress damage, and increased phosphoactivation of PKA and CREB as well as BDNF expression. These results indicate that LU should be further investigated as a treatment for epilepsy.
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Affiliation(s)
- Jun-Li Zhen
- Department of Neurology, Key Laboratory of Neurology of Hebei Province, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Ying-Na Chang
- Department of Internal Medicine, The 54th Institute of CETC Worker's Hospital, Shijiazhuang, Hebei 050081, China
| | - Zhen-Zhen Qu
- Department of Neurology, Key Laboratory of Neurology of Hebei Province, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China
| | - Tao Fu
- Department of Internal Medicine, The 54th Institute of CETC Worker's Hospital, Shijiazhuang, Hebei 050081, China
| | - Jian-Qun Liu
- Department of Neurology, Qianan People's Hospital, Tangshan, Hebei 064400, China
| | - Wei-Ping Wang
- Department of Neurology, Key Laboratory of Neurology of Hebei Province, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, China.
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Chen L, Tian G, Tang W, Luo W, Liu P, Ma Z. Protective effect of luteolin on streptozotocin-induced diabetic renal damage in mice via the regulation of RIP140/NF-кB pathway and insulin signalling pathway. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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19
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Spectroscopic and electrochemical studies on the interaction between luteolin and DNA. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3174-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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20
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Freires IA, de Alencar SM, Rosalen PL. A pharmacological perspective on the use of Brazilian Red Propolis and its isolated compounds against human diseases. Eur J Med Chem 2016; 110:267-79. [DOI: 10.1016/j.ejmech.2016.01.033] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 01/17/2016] [Accepted: 01/18/2016] [Indexed: 01/26/2023]
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21
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Caro AA, Commissariat A, Dunn C, Kim H, García SL, Smith A, Strang H, Stuppy J, Desrochers LP, Goodwin TE. Prooxidant and antioxidant properties of salicylaldehyde isonicotinoyl hydrazone iron chelators in HepG2 cells. Biochim Biophys Acta Gen Subj 2015; 1850:2256-64. [PMID: 26275495 DOI: 10.1016/j.bbagen.2015.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Revised: 07/29/2015] [Accepted: 08/09/2015] [Indexed: 01/12/2023]
Abstract
BACKGROUND Salicylaldehyde isonicotinoyl hydrazone (SIH) is an iron chelator of the aroylhydrazone class that displays antioxidant or prooxidant effects in different mammalian cell lines. Because the liver is the major site of iron storage, elucidating the effect of SIH on hepatic oxidative metabolism is critical for designing effective hepatic antioxidant therapies. METHODS Hepatocyte-like HepG2 cells were exposed to SIH or to analogs showing greater stability, such as N'-[1-(2-Hydroxyphenyl)ethyliden]isonicotinoyl hydrazide (HAPI), or devoid of iron chelating properties, such as benzaldehyde isonicotinoyl hydrazone (BIH), and toxicity, oxidative stress and antioxidant (glutathione) metabolism were evaluated. RESULTS Autoxidation of Fe(2+)in vitro increased in the presence of SIH or HAPI (but not BIH), an effect partially blocked by Fe(2+) chelation. Incubation of HepG2 cells with SIH or HAPI (but not BIH) was non-toxic and increased reactive oxygen species (ROS) levels, activated the transcription factor Nrf2, induced the catalytic subunit of γ-glutamate cysteine ligase (Gclc), and increased glutathione concentration. Fe(2+) chelation decreased ROS and inhibited Nrf2 activation, and Nrf2 knock-down inhibited the induction of Gclc in the presence of HAPI. Inhibition of γ-glutamate cysteine ligase enzymatic activity inhibited the increase in glutathione caused by HAPI, and increased oxidative stress. CONCLUSIONS SIH iron chelators display both prooxidant (increasing the autoxidation rate of Fe(2+)) and antioxidant (activating Nrf2 signaling) effects. GENERAL SIGNIFICANCE Activation by SIH iron chelators of a hormetic antioxidant response contributes to their antioxidant properties and modulates the anti- and pro-oxidant balance.
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Affiliation(s)
- Andres A Caro
- Chemistry Department, Hendrix College, Conway, AR 72032, USA.
| | | | - Caroline Dunn
- Chemistry Department, Hendrix College, Conway, AR 72032, USA
| | - Hyunjoo Kim
- Chemistry Department, Hendrix College, Conway, AR 72032, USA
| | | | - Allen Smith
- Chemistry Department, Hendrix College, Conway, AR 72032, USA
| | - Harrison Strang
- Chemistry Department, Hendrix College, Conway, AR 72032, USA
| | - Jake Stuppy
- Chemistry Department, Hendrix College, Conway, AR 72032, USA
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22
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Kiokias S, Proestos C, Varzakas T. A Review of the Structure, Biosynthesis, Absorption of Carotenoids-Analysis and Properties of their Common Natural Extracts. CURRENT RESEARCH IN NUTRITION AND FOOD SCIENCE 2015. [DOI: 10.12944/crnfsj.4.special-issue1.03] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Carotenoids are a class of natural pigments familiar to all through the orange-red colours of popular foods like oranges, tomatoes and carrots and the yellow colour of many flowers. They have been studied for a number of years because of their diverse roles in photobiology, photochemistry and photo medicine. Carotenoids are also added as colorants to many manufactured foods, drinks, and animal feeds, either in the forms of natural extracts (e.g annatto, paprika or marigold extracts) or as pure compounds manufactured by chemical synthesis. Carotenoids are often described as provitamins A, as this particular vitamin is a product of carotenoid metabolism. The distribution of carotenoids among the different plant groups shows no obvious pattern. b-Carotene is the most abundant in leafy vegetables, though the colour is masked by its co-existence with chlorophyll, and this carotenoid has the highest vitamin A activity. Zeaxanthin, a-carotene and antheraxanthin are also present in small amounts. In the tomato, lycopene is the major carotenoid, while fruits contain varying proportions of cryptoxanthin, lutein and antheraxanthin. In this review paper the natural occurrence of carotenoids (with focus on certain natural extracts) is described along with its structure and physicochemical properties. The biosynthesis - industrial synthesis and absorption of carotenoids is also discussed. Finally, a brief overview of analysis and properties of commonly available natural carotenoid extracts (annato, paprika, xanthophylls, lycopene) are also reported.
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Affiliation(s)
- S. Kiokias
- Higher Technological Educational Institute of Peloponnese, Dept. of Food Technology, School of Agricultural Technology, Food Technology and Nutrition, Kalamata, Greece
| | - C Proestos
- Laboratory of Food Chemistry, Department of Chemistry, University of Athens, Athens, Greece
| | - T Varzakas
- Higher Technological Educational Institute of Peloponnese, Dept. of Food Technology, School of Agricultural Technology, Food Technology and Nutrition, Kalamata, Greece
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Xu Y, Niu X, Zhang H, Xu L, Zhao S, Chen H, Chen X. Switch-on fluorescence sensing of glutathione in food samples based on a graphitic carbon nitride quantum dot (g-CNQD)-Hg²⁺ chemosensor. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:1747-55. [PMID: 25630354 DOI: 10.1021/jf505759z] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Fluorescence sensing of specific biological molecules by artificial chemosensors is a versatile technique. In the present work, a switch-on fluorescence sensor for rapid, sensitive, and selective sensing of glutathione (GSH) in food samples was developed. This method was based on the g-CNQDs-Hg(2+) system, in which the initial fluorescence from g-CNQDs was quenched by Hg(2+) with an electron transfer process. In the presence of GSH, the fluorescence sensor was switched to the "on" state, which was attributed to a competitive affinity of Hg(2+) to GSH and the functional groups on the surface of g-CNQDs. Under the optimal conditions, the limit of detection (LOD) of 37 nM for GSH was achieved with a wide range of 0.16-16 μM. The repeatability was better than 5.3% for GSH in both standard and food samples (n = 3). Finally, this fluorescence sensor was successfully employed for the determination of GSH in various kinds of food samples with excellent recoveries. Furthermore, this application may pave a new way for fluorescence sensing of other substances in food samples.
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Affiliation(s)
- Yali Xu
- State Key Laboratory of Applied Organic Chemistry and ‡Department of Chemistry, Lanzhou University , Lanzhou 730000, China
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