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A Co-based MOF as nanozyme with enhanced oxidase-like activity for highly sensitive and selective colorimetric differentiation of aminophenol isomers. Talanta 2023; 255:124219. [PMID: 36580809 DOI: 10.1016/j.talanta.2022.124219] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/08/2022] [Accepted: 12/25/2022] [Indexed: 12/27/2022]
Abstract
Nanozyme with the merit of excellent and adjustable catalytic activity, outstanding stability and low cost is a promising alternative for natural enzymes widely applied in a variety of fields. In the present study, a new two-dimensional cobalt-based MOF nanocomposite designated as MVCM@β-CD was synthesized. Combined with the strategies of increasing the ratio of Co(Ⅲ)/Co(Ⅱ) and modifying with small molecule β-cyclodextrin (β-CD), MVCM@β-CD displayed remarkably enhanced oxidase-mimicking activity, which was attributed to synergistic effect from large surface area of two dimensional Co-MOF nanosheet, numerous exposed active sites, high-proportioned trivalence of cobalt and regulating action of β-cyclodextrin. The addition of aminophenol isomers inhibited the catalytic oxidation process, resulting in different color change of the solution and UV-Vis absorption behaviors, based on which a sensitive ratiometric colorimetry for m-aminophenol (m-Ap) and a simple colorimetric p-aminophenol (p-Ap) detection method were developed with the detection limit of 0.16 μM and 1.01 μM, respectively. This method realized the colorimetric differentiation of aminophenol isomers, which provided a simple, accurate and low-cost approach for visual discrimination without complicated instrument and procedure, especially appropriate for on-site detection.
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Herniter IA, Kim Y, Wang Y, Havill JS, Johnson-Cicalese J, Muehlbauer GJ, Iorizzo M, Vorsa N. Trait Mapping of Phenolic Acids in an Interspecific ( Vaccinium corymbosum var. caesariense × V. darrowii) Diploid Blueberry Population. PLANTS (BASEL, SWITZERLAND) 2023; 12:1346. [PMID: 36987033 PMCID: PMC10057043 DOI: 10.3390/plants12061346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/06/2023] [Accepted: 03/06/2023] [Indexed: 06/19/2023]
Abstract
Blueberries (Vaccinium sect. Cyanococcus) are a dietary source of phenolic acids, including chlorogenic acid (CGA) and related compounds such as acetylated caffeoylquinic acid (ACQA) and caffeoylarbutin (CA). These compounds are known to be potent antioxidants with potential health benefits. While the chemistry of these compounds has been extensively studied, the genetic analysis has lagged behind. Understanding the genetic basis for traits with potential health implications may be of great use in plant breeding. By characterizing genetic variation related to fruit chemistry, breeders can make more efficient use of plant diversity to develop new cultivars with higher concentrations of these potentially beneficial compounds. Using a large interspecific F1 population, developed from a cross between the temperate V. corymbosum var. ceasariense and the subtropical V. darrowii, with 1025 individuals genotyped using genotype-by-sequencing methods, of which 289 were phenotyped for phenolic acid content, with data collected across 2019 and 2020, we have identified loci associated with phenolic acid content. Loci for the compounds clustered on the proximal arm of Vc02, suggesting that a single gene or several closely associated genes are responsible for the biosynthesis of all four tested compounds. Within this region are multiple gene models similar to hydroxycinnamoyl CoA shikimate/quinate hydroxycinnamoyltransferase (HCT) and UDP glucose:cinnamate glucosyl transferase (UGCT), genes known to be involved in the CGA biosynthesis pathway. Additional loci on Vc07 and Vc12 were associated with caffeoylarbutin content, suggesting a more complicated biosynthesis of that compound.
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Affiliation(s)
- Ira A. Herniter
- Department of Plant Biology, Rutgers University, New Brunswick, NJ 08901, USA
| | - Yurah Kim
- Department of Plant Biology, Rutgers University, New Brunswick, NJ 08901, USA
| | - Yifei Wang
- Department of Plant Biology, Rutgers University, New Brunswick, NJ 08901, USA
| | - Joshua S. Havill
- Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, USA
| | - Jennifer Johnson-Cicalese
- Department of Plant Biology, Rutgers University, New Brunswick, NJ 08901, USA
- Phillip E. Marucci Center for Blueberry and Cranberry Research and Extension, 125a Lake Oswego Road, Chatsworth, NJ 08019, USA
| | - Gary J. Muehlbauer
- Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, USA
| | - Massimo Iorizzo
- Department of Horticultural Science, North Carolina State University, Raleigh, NC 27695, USA
- Plants for Human Health Institute, North Carolina State University, Kannapolis, NC 28081, USA
| | - Nicholi Vorsa
- Department of Plant Biology, Rutgers University, New Brunswick, NJ 08901, USA
- Phillip E. Marucci Center for Blueberry and Cranberry Research and Extension, 125a Lake Oswego Road, Chatsworth, NJ 08019, USA
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Arbutus unedo: Innovative Source of Antioxidant, Anti-Inflammatory and Anti-Tyrosinase Phenolics for Novel Cosmeceuticals. COSMETICS 2022. [DOI: 10.3390/cosmetics9060143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Phenolic compounds are valuable cosmetic ingredients. They display skin protective potential and play an important role in preserving cosmetic formulations due to their ability to neutralize free radicals. Considering this fact, the current study aims to obtain a phenolic-enriched fraction from Arbutus unedo for topical application in cosmeceutical products. The chemical composition and the antioxidant, anti-inflammatory, and anti-tyrosinase activities of different extracts from the plant were investigated and compared. Samples were obtained by maceration, reflux, and ultrasound using water and ethanol. The findings indicated that the extraction methods impacted the phytochemical composition of the extracts. The high-performance liquid chromatography with diode-array detection (HPLC–DAD) analysis showed a wide range of phenolic compounds, comprising phenolic acids and flavonoids. Among the extracts, the water reflux had significant levels of both total polyphenols, flavonoids, and tannins and possessed the most important content on hyperoside. It displayed the most significant antioxidant activities with high antiradical and reducing power, as well as strong total antioxidant activity. It possesses a promising whitening effect with high anti-tyrosinase activities. Furthermore, it shows no cytotoxicity and moderate anti-inflammatory activity. Finally, due to its high yield efficiency and activities, water reflux was selected to formulate a cosmeceutical oil-in-water nanoemulsion that displayed optimal pH and stability.
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Olędzki R, Lutosławski K, Nowicka P, Wojdyło A, Harasym J. Non-Commercial Grapevines Hybrids Fruits as a Novel Food of High Antioxidant Activity. Foods 2022; 11:foods11152216. [PMID: 35892801 PMCID: PMC9331472 DOI: 10.3390/foods11152216] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/09/2022] [Accepted: 07/20/2022] [Indexed: 02/04/2023] Open
Abstract
Non-commercial hybrid grapevine cultivars, usually used for dessert purposes or as ornamental garden plants, may contain a wealth of bioactive substances and thus can be regarded as highly valuable food resources. Antioxidant properties and selected groups of polyphenolic components in the three fractions of fruits: peel, pulp and juice; of five hybrid grape cultivars grown in Poland—Michigan, Alwood, Minnesota, V68021 and Beta—were analyzed and characterized. The liquid chromatography coupled with tandem mass spectrometry (LC-MS-PDA-Q/TOF and UPLC-PDA), total polyphenols, flavonoids and anthocyanins, and DPPH, ABTS and FRAP were used for evaluation of antioxidant potential qualitatively and quantitatively as well as simple reductive sugars were measured. The antioxidant activity and polyphenols content depend mainly on the grape fruit fraction, while they depend to a lesser extent on the cultivar of the hybrid grapes studied. It was confirmed that grape skins are characterized by high antioxidant activity and their bioactive characteristics are similar to many hybrid grape cultivars grown in southern and Mediterranean regions of Europe. Especially grape skins of Alwood and Beta cultivars were characterized by a particularly high content of polyphenolic compounds, mainly from the flavonoid and anthocyanin group and a low content of simple sugars.
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Affiliation(s)
- Remigiusz Olędzki
- Department of Biotechnology and Food Analysis, Wrocław University of Economics and Business, Komandorska 118/120, 53-345 Wrocław, Poland;
- Adaptive Food Systems Accelerator-Science Centre, Wrocław University of Economics and Business, Komandorska 118/120, 53-345 Wrocław, Poland
| | - Krzysztof Lutosławski
- Department of Process Management, Wrocław University of Economics and Business, Komandorska 118/120, 53-345 Wrocław, Poland;
| | - Paulina Nowicka
- Department of Fruit, Vegetable and Nutraceutical Plant Technology, Wrocław University of Environmental and Life Sciences, 37 Chełmońskiego Street, 51-630 Wrocław, Poland; (P.N.); (A.W.)
| | - Aneta Wojdyło
- Department of Fruit, Vegetable and Nutraceutical Plant Technology, Wrocław University of Environmental and Life Sciences, 37 Chełmońskiego Street, 51-630 Wrocław, Poland; (P.N.); (A.W.)
| | - Joanna Harasym
- Department of Biotechnology and Food Analysis, Wrocław University of Economics and Business, Komandorska 118/120, 53-345 Wrocław, Poland;
- Adaptive Food Systems Accelerator-Science Centre, Wrocław University of Economics and Business, Komandorska 118/120, 53-345 Wrocław, Poland
- Correspondence:
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Xu Z, Hong LL, Liu CS, Kong JQ. Protein Engineering of PhUGT, a Donor Promiscuous Glycosyltransferase, for the Improved Enzymatic Synthesis of Antioxidant Quercetin 3- O- N-Acetylgalactosamine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:4076-4085. [PMID: 35321541 DOI: 10.1021/acs.jafc.2c01029] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Quercetin 3-O-N-acetylgalactosamine (Q3GalNAc), a derivative of dietary hyperoside, had never been enzymatically synthesized due to the lack of well-identified N-acetylgalactosamine-transferase (GalNAc-T). Herein, PhUGT, an identified flavonoid 3-O-galactosyltransferase from Petunia hybrida, was demonstrated to display quercetin GalNAc-T activity, transferring a N-acetylgalactosamine (GalNAc) from UDP-N-acetylgalactosamine (UDP-GalNAc) to the 3-OH of quercetin to form Q3GalNAc with a low conversion of 11.7% at 40 °C for 2 h. Protein engineering was thus performed, and the resultant PhUGT variant F368T got an enhanced conversion of 75.5% toward UDP-GalNAc. The enzymatically synthesized Q3GalNAc exhibited a comparable antioxidant activity with other quercetin 3-O-glycosides. Further studies revealed that PhUGT was a donor promiscuous glycosyltransferase (GT), recognizing seven sugar donors. This finding overturned a previous notion that PhUGT exclusively recognized UDP-galactose (UDP-Gal). The reason why PhUGT was mistaken for a UDP-Gal-specific GT was demonstrated to be a shorter reaction time, in which many quercetin 3-O-glycosides, except hyperoside, could not be effectively synthesized. The fact that the microbial cell factory expressing PhUGT could yield an array of Q3Gs further confirmed the donor promiscuity of PhUGT. This study laid a foundation for the scale production of Q3GalNAc and provided a potent biocatalyst capable of glycodiversifying quercetin as well.
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Affiliation(s)
- Zhen Xu
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College (State Key Laboratory of Bioactive Substance and Function of Natural Medicines & NHC Key Laboratory of Biosynthesis of Natural Products), Beijing 100050, China
| | - Li-Li Hong
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College (State Key Laboratory of Bioactive Substance and Function of Natural Medicines & NHC Key Laboratory of Biosynthesis of Natural Products), Beijing 100050, China
| | - Chun-Sheng Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Jian-Qiang Kong
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College (State Key Laboratory of Bioactive Substance and Function of Natural Medicines & NHC Key Laboratory of Biosynthesis of Natural Products), Beijing 100050, China
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Duan S, Uragami C, Horiuchi K, Hino K, Wang XF, Sasaki SI, Tamiaki H, Hashimoto H. Hydroquinone redox mediator enhances the photovoltaic performances of chlorophyll-based bio-inspired solar cells. Commun Chem 2021; 4:118. [PMID: 36697644 PMCID: PMC9814249 DOI: 10.1038/s42004-021-00556-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 07/21/2021] [Indexed: 01/28/2023] Open
Abstract
Chlorophyll (Chl) derivatives have recently been proposed as photoactive materials in next-generation bio-inspired solar cells, because of their natural abundance, environmental friendliness, excellent photoelectric performance, and biodegradability. However, the intrinsic excitation dynamics of Chl derivatives remain unclear. Here, we show sub-nanosecond pump-probe time-resolved absorption spectroscopy of Chl derivatives both in solution and solid film states. We observe the formation of triplet-excited states of Chl derivatives both in deoxygenated solutions and in film samples by adding all-trans-β-carotene as a triplet scavenger. In addition, radical species of the Chl derivatives in solution were identified by adding hydroquinone as a cation radical scavenger and/or anion radical donor. These radical species (either cations or anions) can become carriers in Chl-derivative-based solar cells. Remarkably, the introduction of hydroquinone to the film samples enhanced the carrier lifetimes and the power conversion efficiency of Chl-based solar cells by 20% (from pristine 1.29% to 1.55%). This enhancement is due to a charge recombination process of Chl-A+/Chl-D-, which is based on the natural Z-scheme process of photosynthesis.
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Affiliation(s)
- Shengnan Duan
- grid.64924.3d0000 0004 1760 5735Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun, P. R. China ,Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuen University, Sanda, Hyogo Japan ,grid.411587.e0000 0001 0381 4112School of Science, Chongqing University of Posts and Telecommunications, Chongqing, P. R. China
| | - Chiasa Uragami
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuen University, Sanda, Hyogo Japan
| | - Kota Horiuchi
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuen University, Sanda, Hyogo Japan
| | - Kazuki Hino
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuen University, Sanda, Hyogo Japan
| | - Xiao-Feng Wang
- grid.64924.3d0000 0004 1760 5735Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun, P. R. China
| | - Shin-ichi Sasaki
- grid.419056.f0000 0004 1793 2541Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga Japan ,grid.262576.20000 0000 8863 9909Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga Japan
| | - Hitoshi Tamiaki
- grid.262576.20000 0000 8863 9909Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga Japan
| | - Hideki Hashimoto
- Department of Applied Chemistry for Environment, Graduate School of Science and Technology, Kwansei Gakuen University, Sanda, Hyogo Japan
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Identification of the DPPH radical scavenging reaction adducts of ferulic acid and sinapic acid and their structure-antioxidant activity relationship. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111411] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Makky EA, AlMatar M, Mahmood MH, Ting OW, Qi WZ. Evaluation of the Antioxidant and Antimicrobial Activities of Ethyl Acetate Extract of Saccharomyces cerevisiae. Food Technol Biotechnol 2021; 59:127-136. [PMID: 34316274 PMCID: PMC8284104 DOI: 10.17113/ftb.59.02.21.6658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 03/08/2021] [Indexed: 12/11/2022] Open
Abstract
RESEARCH BACKGROUND Antioxidants are important compounds present at low concentrations that inhibit oxidation processes. Due to the side effects of synthetic antioxidants, research interest has increased considerably towards finding natural sources of antioxidants that can replace the synthetic ones. The emergence and spread of antibiotic resistance require the development of new drugs or some potential sources of novel medicine. This work aims to extract the secondary metabolites of Saccharomyces cerevisiae using ethyl acetate as a solvent and to determine the antioxidant and antimicrobial activities of these extracted metabolites. EXPERIMENTAL APPROACH The antioxidant activity of the secondary metabolites of S. cerevisiae were determined using DPPH, ABTS and FRAP assays. Furthermore, the antimicrobial potential of the ethyl acetate extract of S. cerevisiae against Cutibacterium acnes, Staphylococcus aureus and Staphylococcus epidermidis was assessed. RESULTS AND CONCLUSION Five out of 13 of the extracted secondary metabolites were identified as antioxidants. The antioxidant activity of the S. cerevisiae extract exhibited relatively high IC50 of 455.26 and 294.51 μg/mL for DPPH and ABTS respectively, while the obtained FRAP value, expressed as ascorbic acid equivalents, was 44.40 μg/mL. Moreover, the extract had a significant antibacterial activity (p<0.05) against Staphylococcus aureus and Staphylococcus epidermidis at the concentrations of 100 and 200 mg/mL, respectively. However, no inhibitory effect was observed against Cutibacterium acnes as the extract was only effective against the bacterium at the concentrations of 300 and 400 mg/mL (inhibition zones ranging from 9.0±0.0 to 9.3±0.6) respectively (p<0.05). Staphylococcus aureus was highly sensitive to the extract, with a MIC value of 18.75 mg/mL. NOVELTY AND SCIENTIFIC CONTRIBUTION This report confirmed the efficacy of the secondary metabolites of S. cerevisiae as a natural source of antioxidants and antimicrobials and suggested the possibility of employing them in drugs for the treatment of infectious diseases caused by the tested microorganisms.
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Affiliation(s)
- Essam A. Makky
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
| | - Manaf AlMatar
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
| | - Mahmood H. Mahmood
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
| | - Ooi Wei Ting
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
| | - Wong Zi Qi
- Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang (UMP), Gambang, 26300 Kuantan, Malaysia
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Xu H, Li X, Xin X, Mo L, Zou Y, Zhao G, Yu Y, Chen K. Antityrosinase Mechanism and Antimelanogenic Effect of Arbutin Esters Synthesis Catalyzed by Whole-Cell Biocatalyst. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:4243-4252. [PMID: 33821640 DOI: 10.1021/acs.jafc.0c07379] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Tyrosinase is a key enzyme responsible for enzymatic browning of fruits and vegetables and skin disorders due to overproduction of melanin. Arbutin is an inhibitor of tyrosinase; however, its high polarity and weak transdermal absorption capacity limit its applications. In this paper, a green solvent system was developed to successfully synthesize arbutin esters with improved liposolubilities (Clog P values = 0.27-5.03). Among the obtained esters, arbutin undecenoate (AU) showed the strongest tyrosinase-inhibiting activity (15.6%), which was 9.0 times higher than that of arbutin. An enzyme kinetics study indicated that AU was a competitive inhibitor with reversible inhibition. The esters inhibited tyrosinase by making the secondary structure of tyrosinase looser and less stable; moreover, the interactions between tyrosinase and AU driven by metal interactions and hydrogen bonds also offered a mechanism for inhibition of AU on tyrosinase. In addition, AU (100 μM) reduced the melanin content of B16 mouse melanoma cells to 61.3% of the control group.
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Affiliation(s)
- Haixia Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiaofeng Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xuan Xin
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Lan Mo
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Yucong Zou
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Guanglei Zhao
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China
| | - Yigang Yu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Kebing Chen
- Department of Spine Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Academy of Orthopedics of Guangdong Province, Guangzhou 510630, China
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Zhu H, Qiu Y, Gong D, Wang J, Sun G. A novel method for quality consistency evaluation of Yankening Tablet by multi-wavelength fusion profiling combined with overall components dissolution method and antioxidant activity analysis. J Pharm Biomed Anal 2021; 196:113910. [PMID: 33508766 DOI: 10.1016/j.jpba.2021.113910] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 12/23/2020] [Accepted: 01/16/2021] [Indexed: 10/22/2022]
Abstract
Yankening Tablet (YKNT) is an anti-inflammatory Chinese medicine, which has the effect of heat-clearing and purging pathogenic fire. In this paper, a novel method for quality consistency evaluation of YKNT by multi-wavelength fusion profiling combined with multi-component quantification, overall components dissolution method and antioxidant activity analysis was established. The five-wavelength fusion fingerprint (FWFFP) of 19 batches of YKNT was established, which was evaluated qualitatively and quantitatively by systematic quantified fingerprint method (SQFM), and the quality of YKNTs was divided into different grades successfully. Three active components, Berberine (BBR), baicalin (BCL) and chrysophanol (CRP) in YKNT, were quantitatively determined by quantitative analysis of multi-components by single marker (QAMS). Principal component analysis divided the 19 batches of samples into two categories according to the content difference, which was consistent with the SQFM evaluation results. The combination of SQFM and QAMS successfully achieved the quantitative determination of YKNT from the whole to accurate. Partial least squares (PLS) model was developed to explore the relationship between the antioxidant ability and fingerprint of YKNT. Further overall dissolution UV fingerprints (ODUV-FP) were successfully established, in which the ultraviolet fingerprint (UV-FP) quantitative method was applied to determine the dissolution of the whole chemical substance of traditional Chinese medicine (TCM) preparation. HPLC fingerprints (HPLC-FP) and ODUV-FP were combined to realize the dual control of the quality and efficacy of YKNT, providing a new method for consistency evaluation of TCM.
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Affiliation(s)
- Huan Zhu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, PR China
| | - Yanni Qiu
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, PR China
| | - Dandan Gong
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, PR China
| | - Jianhui Wang
- Zhengzhou food and Drug Inspection Institute, Zhengzhou, PR China
| | - Guoxiang Sun
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, PR China.
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11
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Xu J, Liu H, Liu J, He Y, Gao J, Shi J, Jiang Y. Design and Construction of Enzyme–Nanozyme Integrated Catalyst as a Multifunctional Detection Platform. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04094] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Junyang Xu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Huajiao Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Jianqiao Liu
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Ying He
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Jing Gao
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, P. R. China
| | - Jiafu Shi
- Tianjin Key Lab of Biomass/Wastes Utilization, School of Environmental Science & Engineering, Tianjin University, Tianjin, 300072, P. R. China
| | - Yanjun Jiang
- School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, P. R. China
- National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Hebei University of Technology, Tianjin 300130, P. R. China
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12
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Leng Y, Bao J, Xiao H, Song D, Du J, Mohapatra S, Werner D, Wang J. Transformation mechanisms of tetracycline by horseradish peroxidase with/without redox mediator ABTS for variable water chemistry. CHEMOSPHERE 2020; 258:127306. [PMID: 32540533 DOI: 10.1016/j.chemosphere.2020.127306] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/31/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
The threat of antibiotics in the environment causing antibiotics resistance is a global health concern. Enzymes catalyze pollutant transformations, and how commercially available enzymes like horseradish peroxidase (HRP), with or without a redox mediator, may be used to degrade antibiotics in water treatment is of great interest. This work demonstrates tetracycline transformation by HRP, and how it is significantly enhanced by free radicals created from the mediator 2,2-Azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). Water temperature and pH strongly influence the tetracycline removal rate due to their correlation with the enzyme activity, abundance and stability of ABTS•+. Four transformation products were identified in the pure HRP system using a liquid chromatography tandem mass spectrometry hybrid quadrupole-orbitrap mass spectrometer system. Addition of 25 μmol L-1 ABTS not only accelerated the degradation of tetracycline, but also expanded the range of degradation pathways. Potential tetracycline transformation pathways are proposed based on these observations, which include a range of mechanisms such as hydroxylation, demethylation, dehydration, decarbonylation and secondary alcohol oxidation. Despite of decreased efficiency, the HRP/ABTS system was able to degrade tetracycline in a domestic wastewater treatment plant effluent matrix, which demonstrates the potential of the system to be utilized in wastewater treatment.
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Affiliation(s)
- Yifei Leng
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, PR China
| | - Jianguo Bao
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, PR China.
| | - Henglin Xiao
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, PR China
| | - Dandan Song
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, PR China
| | - Jiangkun Du
- School of Environment Studies, China University of Geosciences, Wuhan, 430074, PR China
| | - Sanjeeb Mohapatra
- School of Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, England, UK
| | - David Werner
- School of Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, England, UK.
| | - Jun Wang
- School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, PR China; College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China.
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Yang Q, Cai X, Yan A, Tian Y, Du M, Wang S. A specific antioxidant peptide: Its properties in controlling oxidation and possible action mechanism. Food Chem 2020; 327:126984. [DOI: 10.1016/j.foodchem.2020.126984] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 02/07/2020] [Accepted: 05/03/2020] [Indexed: 10/24/2022]
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14
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Characterization and analysis of antioxidant activity of walnut-derived pentapeptide PW5 via nuclear magnetic resonance spectroscopy. Food Chem 2020; 339:128047. [PMID: 32949916 DOI: 10.1016/j.foodchem.2020.128047] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 08/19/2020] [Accepted: 09/04/2020] [Indexed: 11/24/2022]
Abstract
The antioxidative activity of natural products has commonly been studied by free radical scavenging methods. However, the mechanisms by which antioxidation is explored by free radical scavenging methods remain largely unknown. This study analyzed the composition of walnut-derived pentapeptides PW5 with potential biological activity and its oxidation reaction products in 2,2'-Azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) test by nuclear magnetic resonance (NMR) spectroscopy. The amino acid sequence of PW5 peptide successfully characterized as Proline-Proline-Lysine-Asparagine-Tryptophan exhibited significant antioxidant activity with lower IC50 value (0.2210 ± 0.0032 mM) compared to glutathione (GSH, 0.2567 ± 0.0023 mM, p < 0.001). Furthermore, we found that the tryptophan residue was the only residue in PW5 with obvious alteration after treatment with ABTS free radicals, which was linked to its potential antioxidant properties. These findings revealed how NMR-characterized structures and oxidation reaction products may be used to explore the antioxidative mechanisms of food-derived peptides as well as other natural products.
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Ilyasov I, Beloborodov V, Antonov D, Dubrovskaya A, Terekhov R, Zhevlakova A, Saydasheva A, Evteev V, Selivanova I. Flavonoids with Glutathione Antioxidant Synergy: Influence of Free Radicals Inflow. Antioxidants (Basel) 2020; 9:antiox9080695. [PMID: 32756351 PMCID: PMC7465956 DOI: 10.3390/antiox9080695] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/24/2020] [Accepted: 07/28/2020] [Indexed: 12/17/2022] Open
Abstract
This report explores the antioxidant interaction of combinations of flavonoid–glutathione with different ratios. Two different 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid radical (ABTS•+)-based approaches were applied for the elucidation of the antioxidant capacity of the combinations. Despite using the same radical, the two approaches employ different free radical inflow systems: An instant, great excess of radicals in the end-point decolorization assay, and a steady inflow of radicals in the lag-time assay. As expected, the flavonoid–glutathione pairs showed contrasting results in these two approaches. All the examined combinations showed additive or light subadditive antioxidant capacity effects in the decolorization assay. This effect showed slight dilution dependence and did not change when the initial ABTS•+ concentration was two times as high or low. However, in the lag-time assay, different types of interaction were detected, from subadditivity to considerable synergy. Taxifolin–glutathione combinations demonstrated the greatest synergy, at up to 112%; quercetin and rutin, in combination with glutathione, revealed moderate synergy in the 30–70% range; while morin–glutathione appeared to be additive or subadditive. In general, this study demonstrated that, on the one hand, the effect of flavonoid–glutathione combinations depends both on the flavonoid structure and molar ratio; on the other hand, the manifestation of the synergy of the combination strongly depends on the mode of inflow of the free radicals.
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Affiliation(s)
- Igor Ilyasov
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
- Correspondence: ; Tel.: +7-985-764-0744
| | - Vladimir Beloborodov
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
| | - Daniil Antonov
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
| | - Anna Dubrovskaya
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
| | - Roman Terekhov
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
| | - Anastasiya Zhevlakova
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
| | - Asiya Saydasheva
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
| | - Vladimir Evteev
- Federal State Budgetary Institution “Scientific Centre for Expert Evaluation of Medicinal Products” of the Ministry of Health of the Russian Federation, Petrovsky blvd. 8/2, 127051 Moscow, Russia;
| | - Irina Selivanova
- Department of Chemistry, Sechenov First Moscow State Medical University, Trubetskaya Str. 8/2, 119991 Moscow, Russia; (V.B.); (D.A.); (A.D.); (R.T.); (A.Z.); (A.S.); (I.S.)
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Olszowy-Tomczyk M, Typek R. Monitoring the changes of 5-caffeoylquinic acid during its reaction with ABTS cation radicals by LC-MS. J LIQ CHROMATOGR R T 2020. [DOI: 10.1080/10826076.2020.1792313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Małgorzata Olszowy-Tomczyk
- Department of Chromatography, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, Lublin, M. Curie-Skłodowskiej Sq. 3, Poland
| | - Rafał Typek
- Department of Chromatography, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Sklodowska University in Lublin, Lublin, M. Curie-Skłodowskiej Sq. 3, Poland
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17
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Ilyasov IR, Beloborodov VL, Selivanova IA, Terekhov RP. ABTS/PP Decolorization Assay of Antioxidant Capacity Reaction Pathways. Int J Mol Sci 2020; 21:ijms21031131. [PMID: 32046308 PMCID: PMC7037303 DOI: 10.3390/ijms21031131] [Citation(s) in RCA: 171] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 01/12/2023] Open
Abstract
The 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS•+) radical cation-based assays are among the most abundant antioxidant capacity assays, together with the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-based assays according to the Scopus citation rates. The main objective of this review was to elucidate the reaction pathways that underlie the ABTS/potassium persulfate decolorization assay of antioxidant capacity. Comparative analysis of the literature data showed that there are two principal reaction pathways. Some antioxidants, at least of phenolic nature, can form coupling adducts with ABTS•+, whereas others can undergo oxidation without coupling, thus the coupling is a specific reaction for certain antioxidants. These coupling adducts can undergo further oxidative degradation, leading to hydrazindyilidene-like and/or imine-like adducts with 3-ethyl-2-oxo-1,3-benzothiazoline-6-sulfonate and 3-ethyl-2-imino-1,3-benzothiazoline-6-sulfonate as marker compounds, respectively. The extent to which the coupling reaction contributes to the total antioxidant capacity, as well as the specificity and relevance of oxidation products, requires further in-depth elucidation. Undoubtedly, there are questions as to the overall application of this assay and this review adds to them, as specific reactions such as coupling might bias a comparison between antioxidants. Nevertheless, ABTS-based assays can still be recommended with certain reservations, particularly for tracking changes in the same antioxidant system during storage and processing.
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18
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Olszowy M. What is responsible for antioxidant properties of polyphenolic compounds from plants? PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 144:135-143. [PMID: 31563754 DOI: 10.1016/j.plaphy.2019.09.039] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/19/2019] [Accepted: 09/23/2019] [Indexed: 05/29/2023]
Abstract
Due to the negative impact of reactive species (including free radicals) on humans and animals, the investigations to find effective substances (antioxidants), which protect living organisms against their damaging influence are carried out throughout the world. As most widespread synthetic antioxidants are suspected of having a noxious effect on the human body, more and more attention is paid to natural antioxidant compounds found in plants (especially phenolic compounds). The aim of this paper is to present the data about antioxidant activity of polyphenolic compounds with the emphasis on the main factors having influence on their antioxidant activity: chemical structure, ability to form hydrogen bonds, capability of metal ions chelation and reduction, adduct formation, kinetic solvents effect, mechanism of antioxidant reaction, capability of antioxidant enzyme activation and reduction potential.
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Affiliation(s)
- Małgorzata Olszowy
- Faculty of Chemistry, Maria Curie Sklodowska University, 20-031, Lublin, Pl. Marii Curie Sklodowskiej 3, Poland.
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19
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Mahalakshmi M, Kumar P. Phloroglucinol-conjugated gold nanoparticles targeting mitochondrial membrane potential of human cervical (HeLa) cancer cell lines. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:450-456. [PMID: 31063960 DOI: 10.1016/j.saa.2019.04.060] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 04/16/2019] [Accepted: 04/22/2019] [Indexed: 06/09/2023]
Abstract
In recent, targeting mitochondria in cancer is considered to be a challenging task. This report illustrates preliminary findings from an investigation of the conjugation of gold nanoparticles with a bioactive natural compound, phloroglucinol targeting mitochondrial transmembrane potential of HeLa cancer cells. We systematically investigated the formation of gold-nano conjugates over precisely controlled reaction conditions. Their sharp features enable superior surface plasmon resonance, morphology, surface charge, and stability. We show that gold-nano conjugates scavenging free radicals and persuade cell death in HeLa cancer cells. We also show that gold-nano conjugates induce apoptosis by promoting mitochondrial transmembrane permeation via fluorescent microscopic studies. This work gives new insights into bridging metabolomics and nanotechnology into developing novel lead therapeutic molecules.
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Affiliation(s)
- Mahalingam Mahalakshmi
- Food Chemistry and Molecular Cancer Biology Lab, Department of Animal Health and Management, Science Campus, Alagappa University, Karaikudi 630 003, India
| | - Ponnuchamy Kumar
- Food Chemistry and Molecular Cancer Biology Lab, Department of Animal Health and Management, Science Campus, Alagappa University, Karaikudi 630 003, India.
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20
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Lv L, Zhang J, Tian F, Li X, Li D, Yu X. Arbutin protects HK-2 cells against high glucose-induced apoptosis and autophagy by up-regulating microRNA-27a. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:2940-2947. [PMID: 31319730 DOI: 10.1080/21691401.2019.1640231] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Lina Lv
- Department of Nephrology, Jining No.1 People's Hospital, Jining, China
- Affiliated Jining No.1 People's Hospital of Jining Medical University, Jining Medical University, Jining, China
| | - Jing Zhang
- Department of Endocrinology, Jining No.1 People's Hospital, Jining, China
| | - Fengqun Tian
- Department of Nephrology, Jiaxiang County Medicine Hospital, Jiaxiang County, Jining, China
| | - Xia Li
- Department of Nephrology, Jining No.1 People's Hospital, Jining, China
| | - Dandan Li
- Department of Endocrinology, Jining No.1 People's Hospital, Jining, China
| | - Xiulian Yu
- Department of Nephrology, Jining No.1 People's Hospital, Jining, China
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21
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Ștefănescu BE, Szabo K, Mocan A, Crişan G. Phenolic Compounds from Five Ericaceae Species Leaves and Their Related Bioavailability and Health Benefits. Molecules 2019; 24:E2046. [PMID: 31146359 PMCID: PMC6600139 DOI: 10.3390/molecules24112046] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 01/13/2023] Open
Abstract
Some species of the Ericaceae family have been intensively studied because of the beneficial health impact, known since ancient times, of their chemical components. Since most studies focus on the effects of fruit consumption, this review aims to highlight the phenolic components present in the leaves. For this purpose, five species from Ericaceae family (bilberry-Vaccinium myrtillus L., lingonberry-V. vitis-idaea L., bog bilberry-V. uliginosum L., blueberry-V. corymbosum L. and bearberry-Arctostapylos uva-ursi L.) were considered, four of which can be found in spontaneous flora. The chemical composition of the leaves revealed three major phenolic compounds: chlorogenic acid, quercetin and arbutin. The health promoting functions of these compounds, such as antioxidant and anti-inflammatory properties that could have preventive effects for cardiovascular disease, neurodegenerative disorders, cancer, and obesity, have been exemplified by both in vitro and in vivo studies in this review. Furthermore, the importance of bioaccessibility and bioavailability of the phenolic compounds have been summarized. The findings highlight the fact that leaves of some Ericaceae species deserve increased attention and should be studied more profoundly for their biological activities, especially those from spontaneous flora.
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Affiliation(s)
- Bianca Eugenia Ștefănescu
- Department of Pharmaceutical Botany, "Iuliu Hațieganu" University of Medicine and Pharmacy, 23, Ghe. Marinescu Street, 400337 Cluj-Napoca, Romania.
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, CaleaMănăştur 3-5, 400372 Cluj-Napoca, Romania.
| | - Katalin Szabo
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, CaleaMănăştur 3-5, 400372 Cluj-Napoca, Romania.
| | - Andrei Mocan
- Department of Pharmaceutical Botany, "Iuliu Hațieganu" University of Medicine and Pharmacy, 23, Ghe. Marinescu Street, 400337 Cluj-Napoca, Romania.
- Laboratory of Chromatography, Institute of Advanced Horticulture Research of Transylvania, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania.
| | - Gianina Crişan
- Department of Pharmaceutical Botany, "Iuliu Hațieganu" University of Medicine and Pharmacy, 23, Ghe. Marinescu Street, 400337 Cluj-Napoca, Romania.
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22
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Olszowy M, Dawidowicz AL, Jóźwik-Dolęba M. Are mutual interactions between antioxidants the only factors responsible for antagonistic antioxidant effect of their mixtures? Additive and antagonistic antioxidant effects in mixtures of gallic, ferulic and caffeic acids. Eur Food Res Technol 2019. [DOI: 10.1007/s00217-019-03255-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Mahendran G, Ponnuchamy K. Coumarin–gold nanoparticle bioconjugates: preparation, antioxidant, and cytotoxic effects against MCF-7 breast cancer cells. APPLIED NANOSCIENCE 2018. [DOI: 10.1007/s13204-018-0816-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Fermentation and complex enzyme hydrolysis for improving the total soluble phenolic contents, flavonoid aglycones contents and bio-activities of guava leaves tea. Food Chem 2018; 264:189-198. [PMID: 29853365 DOI: 10.1016/j.foodchem.2018.05.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 04/29/2018] [Accepted: 05/04/2018] [Indexed: 11/20/2022]
Abstract
There are both soluble and insoluble-bound forms of phenolics in tea-leaf products. In order to increase total soluble phenolics contents, guava leaves tea (GLT) was first fermented with Monascus anka and Saccharomyces cerevisiae, and then hydrolyzed with complex enzymes. The changes in phenolics profiles, antioxidant activities and inhibitory effect on α-glucosidase in processed GLT were investigated. Compared with the un-fermented GLT, fermentation and complex enzymatic processing (FE) significantly increased the total phenolics, total flavonoids, quercetin and kaempferol contents by 2.1, 2.0, 13.0 and 6.8 times, respectively. After the FE, a major proportion of phenolics existed in the soluble form. Quercetin was released in the highest amount among different phenolics. In addition, soluble phenolic extracts from GLT following FE exhibited a highest antioxidant activity and inhibitory effect on α-glucosidase. The paper suggested an improved method for processing GLT into high-value products rich in phenolics and flavonoids aglycones with enhanced health benefits.
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Youn JS, Kim YJ, Na HJ, Jung HR, Song CK, Kang SY, Kim JY. Antioxidant activity and contents of leaf extracts obtained from Dendropanax morbifera LEV are dependent on the collecting season and extraction conditions. Food Sci Biotechnol 2018; 28:201-207. [PMID: 30815311 DOI: 10.1007/s10068-018-0352-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/12/2018] [Accepted: 03/01/2018] [Indexed: 12/19/2022] Open
Abstract
This study compared the antioxidant activity of extracts from Dendropanax morbifera (D. morbifera) Levillis leaves. The concentrations of flavonoids and polyphenols were measured in extracts of D. morbifera leaves. The antioxidant activities were examined by ABTS and DPPH radical scavenging activity and ferric reducing antioxidant power (FRAP). Total flavonoid and polyphenol contents, and FRAP were highest in the 30% ethanol extract collected in May. The ABTS and DPPH radical scavenging activities were the highest in the 60% ethanol extract harvested in May. For investigating the relationship between antioxidant activity and specific polyphenols, rutin and chlorogenic acid of the polyphenol component were quantified by LC-MS/MS analysis. The concentrations of them were highest in the 60% ethanol extract collected in May, and showed positive correlations with antioxidant activities. The optimal extraction conditions to yield the most effective antioxidant activity were obtained using a 60% ethanol extraction solvent with samples collected in May.
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Affiliation(s)
- Ji Sun Youn
- 1Department of Food Science and Technology, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul, 139-743 Korea
| | - Young-Jun Kim
- 1Department of Food Science and Technology, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul, 139-743 Korea
| | - Hye Jin Na
- Korea Food Information Institute, Banseok-ro, Yuseong-gu, DaeJeon, 34068 Korea
| | - Hae Rim Jung
- Korea Food Information Institute, Banseok-ro, Yuseong-gu, DaeJeon, 34068 Korea
| | - Chang Khil Song
- Agency for Jeju Plant Resources Dendropanax, Jejuuniversity-ro, Jeju, 63243 Korea
| | - So Young Kang
- Agency for Jeju Plant Resources Dendropanax, Jejuuniversity-ro, Jeju, 63243 Korea
| | - Ji Yeon Kim
- 1Department of Food Science and Technology, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul, 139-743 Korea
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Structural evidence for the DPPH radical-scavenging mechanism of 2-O-α-d-glucopyranosyl-l-ascorbic acid. Bioorg Med Chem 2017; 25:5303-5310. [DOI: 10.1016/j.bmc.2017.07.044] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 07/25/2017] [Accepted: 07/26/2017] [Indexed: 11/27/2022]
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