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Somacal S, Schüler da Silva LC, de Oliveira J, Emanuelli T, Fabro de Bem A. Bixin, a New Atheroprotective Carotenoid Candidate, Prevents oxLDL-Induced Cytotoxicity and Mitochondrial Dysfunction in Macrophages: Involvement of the Nrf2 and NF-κB Pathways. Foods 2024; 13:2002. [PMID: 38998509 PMCID: PMC11241531 DOI: 10.3390/foods13132002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/18/2024] [Accepted: 06/21/2024] [Indexed: 07/14/2024] Open
Abstract
The accumulation of oxidized low-density lipoprotein (oxLDL) and its toxicity in the arterial wall have been implicated in atherosclerosis. This study aimed to investigate the mechanisms underlying the atheroprotective effect of bixin, a carotenoid obtained from the seeds of the tropical plant Bixa orellana, on Cu2+-induced LDL oxidation and oxLDL-mediated effects in J774A.1 macrophage cells. Bixin's effects were compared to those of lycopene, a carotenoid widely studied for its cardiovascular protective effects. LDL was isolated from human plasma, incubated with bixin or lycopene (positive control), and subjected to oxidation with CuSO4. Afterward, bixin or lycopene was incubated with J774A.1 macrophage cells and exposed to oxLDL. The levels of ROS, RNS, GSH, nitrite, mitochondrial function, and foam cell formation, as well as the expression of proteins related to the antioxidant and inflammatory status, were evaluated. The effect of bixin in inhibiting in vitro human-isolated LDL oxidation was more potent (5-6-fold) than that of lycopene. Bixin pretreatment reduced the atherogenic signaling triggered by oxLDL in the macrophages, namely the generation of reactive species, disturbance of nitric oxide homeostasis, mitochondrial dysfunction, and foam cell formation. The cytoprotective effects of bixin were accompanied by the upregulation of Nrf2 and the downregulation of the NF-kB pathways. Lycopene showed the same protective effect as bixin, except that it did not prevent mitochondrial dysfunction. The efficient performance of bixin makes it an ideal candidate for further trials as a new nutraceutical compound for the prevention of atherosclerosis.
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Affiliation(s)
- Sabrina Somacal
- Graduate Program on Pharmacology, Center of Health Sciences, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| | | | - Jade de Oliveira
- Department of Biochemistry, Federal University of Rio Grande do Sul, Porto Alegre 90035-000, RS, Brazil
| | - Tatiana Emanuelli
- Department of Food Technology and Science, Center of Rural Sciences, Federal University of Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Andreza Fabro de Bem
- Laboratory of Bioenergetic and Metabolism, Institute of Biological Science, University of Brasília, Brasília 70910-900, DF, Brazil
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Varghese R, Buragohain T, Banerjee I, Mukherjee R, Penshanwar SN, Agasti S, Ramamoorthy S. The apocarotenoid production in microbial biofactories: An overview. J Biotechnol 2023; 374:5-16. [PMID: 37499877 DOI: 10.1016/j.jbiotec.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 06/29/2023] [Accepted: 07/20/2023] [Indexed: 07/29/2023]
Abstract
Carotenoids are a vast group of natural pigments that come in a variety of colors ranging from red to orange. Apocarotenoids are derived from these carotenoids, which are hormones, pigments, retinoids, and volatiles employed in the textiles, cosmetics, pharmaceutical, and food industries. Due to the high commercial value and poor natural host abundance, they are significantly undersupplied. Microbes like Saccharomyces cerevisiae and Escherichia coli act as heterologous hosts for apocarotenoid production. This article briefly reviews categories of apocarotenoids, their biosynthetic pathway commencing from the MVA and MEP, its significance, the tool enzymes for apocarotenoid biosynthesis like CCDs, their biotechnological production in microbial factories, and future perspectives.
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Affiliation(s)
- Ressin Varghese
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Tinamoni Buragohain
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Ishani Banerjee
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Rishyani Mukherjee
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Shraddha Naresh Penshanwar
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Swapna Agasti
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India
| | - Siva Ramamoorthy
- School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore 632014, Tamil Nadu, India.
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Ashraf A, Ijaz MU, Muzammil S, Nazir MM, Zafar S, Zihad SMNK, Uddin SJ, Hasnain MS, Nayak AK. The role of bixin as antioxidant, anti-inflammatory, anticancer, and skin protecting natural product extracted from Bixa orellana L. Fitoterapia 2023; 169:105612. [PMID: 37454777 DOI: 10.1016/j.fitote.2023.105612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
Since long, medicinal plants or herbs are being used in different traditional treatment systems as therapeutic agents to treat a variety of illnesses. Bixa orellana L., an medicinal plant (family: Bixaceae), is an Ayurvedic herb used to treat dyslipidemia, diarrhoea, and hepatitis since ancient times. B. orellana L., seeds contain an orange-red coloured component known as bixin (C25H30O4), which constitutes 80% of the extract.Chemically, bixin is a natural apocarotenoid, biosynthesized through the oxidative degradation of C40 carotenoids. Bixin helps to regulate the Nrf2/MyD88/TLR4 and TGF-1/PPAR-/Smad3 pathways, which further give it antifibrosis, antioxidant, and anti-inflammatory properties. This current review article presents a comprehensive review of bixin as an anti-inflammatory, antioxidant, anticancer,and skin protecting natural product. In addition, the biosynthesis and molecular target of bixin, along with bixin extraction techniques, are also presented.
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Affiliation(s)
- Asma Ashraf
- Department of Zoology, Government College University, Faisalabad 38000, Pakistan.
| | - Muhammad Umar Ijaz
- Department of Zoology, Wildlife and Fisheries, University of Agriculture, Faisalabad 38040, Pakistan
| | - Saima Muzammil
- Department of Microbiology, Government College University, Faisalabad 38000, Pakistan
| | | | - Saima Zafar
- Department of Zoology, Government College University, Faisalabad 38000, Pakistan
| | - S M Neamul Kabir Zihad
- Department of Pharmacy, State University of Bangladesh, Dhaka 1205, Bangladesh; Pharmacy Discipline, Khulna University, Khulna 9208, Bangladesh
| | | | - Md Saquib Hasnain
- Department of Pharmacy, Palamau Institute of Pharmacy, Chianki, Daltonganj 822102, Jharkhand, India.
| | - Amit Kumar Nayak
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751003, Odisha, India.
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Hu ZZ, Sha XM, Zhang L, Zha MJ, Tu ZC. From Fish Scale Gelatin to Tyrosinase Inhibitor: A Novel Peptides Screening Approach Application. Front Nutr 2022; 9:853442. [PMID: 35369091 PMCID: PMC8973439 DOI: 10.3389/fnut.2022.853442] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/07/2022] [Indexed: 11/13/2022] Open
Abstract
Bioaffinity ultrafiltration combined with LC-Orbitrap-MS/MS was applied for the first time to achieve rapid screening and identification of tyrosinase inhibitory peptides (TYIPs) from grass carp scale gelatin hydrolysates. The binding mode of TYIPs with tyrosinase was investigated by molecular docking technology. The whitening effect of TYIPs was further studied by evaluating the tyrosinase activity and melanin content in mouse B16F10 cells. Four new TYIPs were screened from hydrolysates, among which DLGFLARGF showed the strongest tyrosinase inhibition with an IC50 value of 3.09 mM. Molecular docking showed that hydrogen bonds were the main driving force in the interaction between the peptide DLGFLARGF and tyrosinase. The addition of DLGFLARGF significantly inhibited the tyrosinase activity and melanin production of B16F10 melanoma cells. These results suggest that DLGFLARGF is a promising skin whitening agent for the treatment of potential pigment-related diseases.
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Affiliation(s)
- Zi-Zi Hu
- National R&D Center for Freshwater Fish Processing, College of Chemistry and Chemical Engineering & College of Life Science, Jiangxi Normal University, Nanchang, China
| | - Xiao-Mei Sha
- National R&D Center for Freshwater Fish Processing, College of Chemistry and Chemical Engineering & College of Life Science, Jiangxi Normal University, Nanchang, China
- *Correspondence: Xiao-Mei Sha
| | - Lu Zhang
- National R&D Center for Freshwater Fish Processing, College of Chemistry and Chemical Engineering & College of Life Science, Jiangxi Normal University, Nanchang, China
| | - Min-Jun Zha
- National R&D Center for Freshwater Fish Processing, College of Chemistry and Chemical Engineering & College of Life Science, Jiangxi Normal University, Nanchang, China
| | - Zong-Cai Tu
- National R&D Center for Freshwater Fish Processing, College of Chemistry and Chemical Engineering & College of Life Science, Jiangxi Normal University, Nanchang, China
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Zong-Cai Tu
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Kusmita L, Franyoto YD, Mutmainah M, Puspitaningrum I, Nurcahyanti ADR. Bixa orellana L. carotenoids: antiproliferative activity on human lung cancer, breast cancer, and cervical cancer cells in vitro. Nat Prod Res 2022; 36:6421-6427. [PMID: 35133226 DOI: 10.1080/14786419.2022.2036144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Emerging evidence on the potential pro-oxidant effect of carotenoids provokes apoptosis of cancer cells. Bixa orellana L. is native to Central and South America, interestingly, is also cultivated worldwide. Apo-carotenoids present in B. orellana L. are mainly dominated by bixin and norbixin and demonstrate fundamental antioxidant activity. Anti-proliferative activity on human cancer cells is rarely investigated. We isolated bixin from B. orellana L. found in the island of Java using Ultra-Fast Liquid Chromatography and confirmed the isolated compound using Liquid Chromatography-MS/MS. Bixin and crude extract were examined on human lung cancer (A549), cervical cancer (HeLa), and breast cancer (MCF-7). Anti-proliferative activity revealed to be promising on both, the isolated pigment and crude extract. Further investigation on the mechanism of action and effect on other cell lines, both in vitro and in vivo, are required before clinical translation.
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Affiliation(s)
- Lia Kusmita
- Department of Pharmacy, STIFAR Yayasan Pharmasi Semarang, Plamongansari Pucanggading Semarang, Indonesia
| | - Yuvianti Dwi Franyoto
- Department of Pharmacy, STIFAR Yayasan Pharmasi Semarang, Plamongansari Pucanggading Semarang, Indonesia
| | - Mutmainah Mutmainah
- Department of Pharmacy, STIFAR Yayasan Pharmasi Semarang, Plamongansari Pucanggading Semarang, Indonesia
| | - Ika Puspitaningrum
- Department of Pharmacy, STIFAR Yayasan Pharmasi Semarang, Plamongansari Pucanggading Semarang, Indonesia
| | - Agustina D R Nurcahyanti
- Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Jakarta, Indonesia
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Varghese R, George Priya Doss C, Kumar RS, Almansour AI, Arumugam N, Efferth T, Ramamoorthy S. Cardioprotective effects of phytopigments via multiple signaling pathways. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 95:153859. [PMID: 34856476 DOI: 10.1016/j.phymed.2021.153859] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/08/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Cardiovascular diseases (CVDs) are among the deadliest non-communicable diseases, and millions of dollars are spent every year to combat CVDs. Unfortunately, the multifactorial etiology of CVDs complicates the development of efficient therapeutics. Interestingly, phytopigments show significant pleiotropic cardioprotective effects both in vitro and in vivo. PURPOSE This review gives an overview of the cardioprotective effects of phytopigments based on in vitro and in vivo studies as well as clinical trials. METHODS A literature-based survey was performed to collect the available data on cardioprotective activities of phytopigments via electronic search engines such as PubMed, Google Scholar, and Scopus. RESULTS Different classes of phytopigments such as carotenoids, xanthophylls, flavonoids, anthocyanins, anthraquinones alleviate major CVDs (e.g., cardiac hypertrophy, atherosclerosis, hypertension, cardiotoxicities) via acting on signaling pathways related to AMPK, NF-κB, NRF2, PPARs, AKT, TLRs, MAPK, JAK/STAT, NLRP3, TNF-α, and RA. CONCLUSION Phytopigments represent promising candidates to develop novel and effective CVD therapeutics. More randomized, placebo-controlled clinical studies are recommended to establish the clinical efficacy of phytopigments.
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Affiliation(s)
- Ressin Varghese
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - C George Priya Doss
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Raju Suresh Kumar
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulrahman I Almansour
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Natarajan Arumugam
- Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Mainz, Germany
| | - Siva Ramamoorthy
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India.
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7
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Zhao L, Zhou N, Zhang H, Pan F, Ai X, Wang Y, Hao S, Wang C. Cyanidin-3-O-glucoside and its metabolite protocatechuic acid ameliorate 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) induced cytotoxicity in HepG2 cells by regulating apoptotic and Nrf2/p62 pathways. Food Chem Toxicol 2021; 157:112582. [PMID: 34582963 DOI: 10.1016/j.fct.2021.112582] [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: 08/24/2021] [Revised: 08/27/2021] [Accepted: 09/22/2021] [Indexed: 01/03/2023]
Abstract
The present study investigated the protective effects and mechanism of action of cyanidin-3-O-glucoside (C3G) and its major metabolite protocatechuic acid (PCA) against 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) induced cytotoxicity in HepG2 cells. The results demonstrated that C3G and PCA dose-dependently suppressed PhIP-induced mutation in Salmonella typhimurium TA98, and inhibited PhIP-induced cytotoxicity and apoptosis in HepG2 cells. Western blot analysis indicated that C3G and PCA minimized PhIP-induced cell damage by reversing the abnormal expression of Bax/Bcl-2, Cytochrome c, cleaved Caspase-3, XIAP, Nrf2, HO-1, LC3 and p62 involved in intrinsic apoptotic and Nrf2/p62 pathways. Molecular docking results revealed that C3G and PCA were able to interfere with Nrf2 signaling and apoptotic cascade through binding to Keap1 and Bcl-2. Moreover, the protective effect of C3G was stronger than that of PCA. These findings suggested that dietary consumption of food sources rich in C3G can fight against the health risks of heterocyclic aromatic amines.
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Affiliation(s)
- Lei Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China.
| | - Na Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Huimin Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Fei Pan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Xin Ai
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Yong Wang
- Academy of National Food and Strategic Reserves Administration, Beijing, 100037, China
| | - Shuai Hao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
| | - Chengtao Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
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8
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Strategies to meet the global demand for natural food colorant bixin: A multidisciplinary approach. J Biotechnol 2021; 338:40-51. [PMID: 34271054 DOI: 10.1016/j.jbiotec.2021.07.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 06/02/2021] [Accepted: 07/09/2021] [Indexed: 11/23/2022]
Abstract
Bixin is an apocarotenoid derived from Bixa orellana L. well known as a food colorant along with its numerous industrial and therapeutic applications. With the current surge in usage of natural products, bixin has contributed immensely to the world carotenoid market and showcases a spike in its requirement globally. To bridge the gap between bixin availability and utility, owed to its bioactivity and demand as a colouring agent in industries the sustainable production of bixin is critical. Therefore, to meet up this challenge effective use of multidisciplinary strategies is a promising choice to enhance bixin quantity and quality. Here we report, an optimal blend of approaches directed towards manipulation of bixin biosynthesis pathway with an insight into the impact of regulatory mechanisms and environmental dynamics, engineering carotenoid degradation in plants other than annatto, usage of tissue culture techniques supported with diverse elicitations, molecular breeding, application of in silico predictive tools, screening of microbial bio-factories as alternatives, preservation of bixin bioavailability, and promotion of eco-friendly extraction techniques to play a collaborative role in promoting sustainable bixin production.
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Basting RT, Abreu PMBD, Sousa IMDO, de Carvalho JE, Carvalho PRN, Foglio MA. Bixa orellana L. by-products' fractions from an industrial process: antiproliferative activity on tumor cells and chemical profile. Nat Prod Res 2020; 35:6106-6111. [PMID: 33016138 DOI: 10.1080/14786419.2020.1826482] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
This study evaluated the phytochemical characterization of Bixa orellana (BO extract) unsaponifiable extract and resulting fractions (F fraction - FF, Geranyl fraction - GF and R fraction- RF) obtained as by-products of an industrial process investigating in vitro antiproliferative activities in human tumoral cells. The main compounds identified by GC-MS for BO extract were Geranylgeraniol (61.51%); for FF: Geranylgeraniol (70.23%); for GF: Geranylgeraniol (78.92%) and for RF: β-cubebene (27.75%). Quantifications of geranylgeraniol by GC-FID presented the percentage content: BO 27.52%; FF 38.52%; GF 51.44% and RF 1.81%. BO extract showed a significant antiproliferative activity, with GI50 up to 4 µg/mL. All fractions had a remarkably similar antiproliferative activity profile (GI50 27-47 µg/mL). Data reported herein showed an important cytostatic effect for BO extract, nevertheless this activity is not attributed exclusively to geranylgeraniol. In conclusion, this by-product becomes of great value, being a potential candidate for development of new anti-tumor ingredients.
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Affiliation(s)
- Rosanna Tarkany Basting
- São Leopoldo Mandic, Laboratory of Neuroimmune Interface of Pain Research, Campinas, Brazil.,Faculty of Pharmaceutical Sciences (FCF), University of Campinas (UNICAMP), Campinas, Brazil
| | | | | | | | | | - Mary Ann Foglio
- Faculty of Pharmaceutical Sciences (FCF), University of Campinas (UNICAMP), Campinas, Brazil
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Li J, Lin Z, Tang X, Liu G, Chen Y, Zhai X, Huang Q, Cao Y. Oxyresveratrol extracted from Artocarpus heterophyllus Lam. inhibits tyrosinase and age pigments in vitro and in vivo. Food Funct 2020; 11:6595-6607. [PMID: 32648885 DOI: 10.1039/d0fo01193b] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We extracted and purified oxyresveratrol (OXY) from Artocarpus heterophyllus Lam. and identified its structure. The kinetics and mechanisms of OXY-induced mushroom tyrosinase inhibition were studied using fluorescence spectroscopy, copper ion chelation, and circular dichroism (CD). We found that OXY significantly inhibited tyrosinase with a half maximal inhibitory concentration (IC50) of 0.03 mM. The inhibitory effect of OXY on tyrosinase was almost 25 times that of kojic acid, which had an IC50 of 0.78 mM. Additionally, OXY and the tyrosinase substrate L-dopa did not have a competitive relationship; OXY is a non-competitive inhibitor. Using a fluorescence quenching experiment, we determined the corresponding rate constant (Kq) values at 298, 303, and 310 K to be 2.24 × 1012, 1.08 × 1012 and 1.44 × 1012 L mol-1 s-1, respectively. The OXY and tyrosinase interaction occured mainly through van der Waals forces and a hydrogen bond between the -OH group and its amino acid residue. Furthermore, we investigated the effects of OXY on murine melanoma B16 cells and on age pigments in Caenorhabditis elegans (C. elegans). OXY decreased melanin production by inhibiting the tyrosinase activity in murine melanoma B16 cells, which decreased superoxide dismutase (SOD) and glutathione peroxidase (GSH) and increased catalase (CAT), leading to apoptosis. The lifespan of nematodes in the 50 ml resveratrol-treated group was significantly longer than that in the blank group by 5%. The mean lifespan of nematodes in the 50 μM OXY-treated group was significantly longer than that in the blank group by 6.82%.The fluorescence intensity of C. elegans pigments decreased by 30.43%, 47.35% and 64.42% after the treatment with a low, middle, and high OXY dose, respectively, showing that OXY has a significant inhibitory effect on melanin and age pigment production.
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Affiliation(s)
- Jun Li
- College of Food Science, South China Agricultural University, Guangzhou 510642, People's Republic of China.
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Ma L, Wang X, Li W, Miao D, Li Y, Lu J, Zhao Y. Synthesis and anti-cancer activity studies of dammarane-type triterpenoid derivatives. Eur J Med Chem 2020; 187:111964. [PMID: 31862444 DOI: 10.1016/j.ejmech.2019.111964] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/10/2019] [Accepted: 12/10/2019] [Indexed: 02/08/2023]
Abstract
Two series of novel derivatives of AD-2, an active ginsenoside derived from ginseng were designed and synthesized. Five human cancer cell lines (MGC-803, SGC-7901, A549, MCF-7, PC-3 cells) and one normal ovarian cell IOSE144 were employed to evaluate the anti-proliferative activity. Most of derivatives possessed obvious enhanced activity compared with AD-2. Among them, compound 4c displayed the most excellent activity in all tested cancer cell lines, especially A549 cells with an IC50 value of 1.07 ± 0.05 μM. The underlying mechanism study suggested that 4c induced S-phase arrest and apoptosis in A549 cells. Increasing the level of ROS and inducing collapse of MMP in cells treated with 4c were also proved. Moreover, Western blot analysis showed that the expression level of p53 and p21 were obviously increased. 4c could remarkably up-regulate the expression of cyt c in cytosol, the ratio of Bax to Bcl-2 and activate caspase-3/9/PARP. Besides, the expression level of MDM2 was remarkably decreased. The results indicated that 4c caused apoptosis through the mitochondrial pathway, which ROS generation was probably involved in, and had the potent to serve as anti-proliferative agent.
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Affiliation(s)
- Lu Ma
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Xude Wang
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Wei Li
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Dongyu Miao
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yan Li
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Jincai Lu
- Department of Medicinal Plant, Shenyang Pharmaceutical University, Shenyang, 110016, China.
| | - Yuqing Zhao
- School of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China; Key Laboratory of Structure-based Drug Design &; Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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12
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de Oliveira Júnior RG, Bonnet A, Braconnier E, Groult H, Prunier G, Beaugeard L, Grougnet R, da Silva Almeida JRG, Ferraz CAA, Picot L. Bixin, an apocarotenoid isolated from Bixa orellana L., sensitizes human melanoma cells to dacarbazine-induced apoptosis through ROS-mediated cytotoxicity. Food Chem Toxicol 2019; 125:549-561. [DOI: 10.1016/j.fct.2019.02.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/11/2019] [Accepted: 02/04/2019] [Indexed: 01/23/2023]
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13
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Dai F, Du YT, Zheng YL, Zhou B. A promising redox cycle-based strategy for designing a catechol-type diphenylbutadiene as a potent prooxidative anti-melanoma agent. Free Radic Biol Med 2019; 130:489-498. [PMID: 30458279 DOI: 10.1016/j.freeradbiomed.2018.11.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 12/14/2022]
Abstract
Developing anti-melanoma agents with increased activity and specificity is highly desirable due to the increasing incidence, highly metastatic malignancy, and high mortality rate of melanoma. Abnormal redox characteristics such as higher levels of tyrosinase, NAD(P)H: quinone oxidoreductase-1 (NQO1) and reactive oxygen species (ROS) observed in melanoma cells than in other cancer cells and normal cells illustrate their redox vulnerability and have opened a window for developing prooxidative anti-melanoma agents (PAAs) to target the vulnerability. However, how to design PAAs which promote selectively the ROS accumulation in melanoma cells remains a challenge. This work describes a promising redox cycle-based strategy for designing a catechol-type diphenylbutadiene as such type of PAA. This molecule is capable of constructing an efficient catalytic redox cycle with tyrosinase and NQO1 in melanoma B16F1 cells to induce selectively the ROS (mainly including hydrogen peroxide, H2O2) accumulation in the cells, resulting in highly selective suppression of melanoma B16F1 cells over tyrosinase-deficient HeLa and normal L-02 cells.
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Affiliation(s)
- Fang Dai
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Yu-Ting Du
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Ya-Long Zheng
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Bo Zhou
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China.
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Baldivia DDS, Leite DF, Castro DTHD, Campos JF, Santos UPD, Paredes-Gamero EJ, Carollo CA, Silva DB, de Picoli Souza K, Dos Santos EL. Evaluation of In Vitro Antioxidant and Anticancer Properties of the Aqueous Extract from the Stem Bark of Stryphnodendron adstringens. Int J Mol Sci 2018; 19:ijms19082432. [PMID: 30126115 PMCID: PMC6121951 DOI: 10.3390/ijms19082432] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/08/2018] [Accepted: 08/08/2018] [Indexed: 12/13/2022] Open
Abstract
Stryphnodendron adstringens (Mart.) Coville (Fabaceae) is a tree species native to the Brazilian Cerrado commonly known as barbatimão. In traditional medicine, decoctions or infusions of the stem bark of this plant are used in the treatment of several diseases. The objective of this study was to analyze the chemical composition of Stryphnodendron adstringens aqueous extracts (SAAE) prepared from the stem bark to assess their antioxidant activity and anticancer effects as well as characterize cell death mechanisms against murine B16F10Nex-2 melanoma cells. From the SAAE, gallic acid, gallocatechin, epigallocatechin, dimeric and trimeric proanthocyanidins mainly composed of prodelphinidin units and the isomeric chromones C-hexosyl- and O-pentosyl-5,7-dihydroxychromone were identified. The SAAE showed antioxidant activity through direct free-radical scavenging as well as through oxidative hemolysis and lipid peroxidation inhibition in human erythrocytes. Furthermore, SAAE promoted apoptosis-induced cell death in melanoma cells by increasing intracellular reactive oxygen species (ROS) levels, inducing mitochondrial membrane potential dysfunction and activating caspase-3. Together, these data show the antioxidant and anticancer effects of Stryphnodendron adstringens. These results open new perspectives for studies against other tumor cell lines and in vivo models as well as for the identification and isolation of the chemical constituents responsible for these effects.
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Affiliation(s)
- Débora da Silva Baldivia
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
| | - Daniel Ferreira Leite
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
| | - David Tsuyoshi Hiramatsu de Castro
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
| | - Jaqueline Ferreira Campos
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
| | - Uilson Pereira Dos Santos
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
| | | | - Carlos Alexandre Carollo
- Laboratory of Natural Products and Mass Spectrometry, Federal University of Mato Grosso do Sul, University City, s/n, 79070-900 Campo Grande, MS, Brazil.
| | - Denise Brentan Silva
- Laboratory of Natural Products and Mass Spectrometry, Federal University of Mato Grosso do Sul, University City, s/n, 79070-900 Campo Grande, MS, Brazil.
| | - Kely de Picoli Souza
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
| | - Edson Lucas Dos Santos
- Research Group on Biotechnology and Bioprospecting Applied to Metabolism (GEBBAM), Federal University of Grande Dourados, Rodovia Dourados Itahum, Km 12, CEP: 79.804-970 Dourados, MS, Brazil.
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15
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Wang LX, Qian J, Zhao LN, Zhao SH. Effects of volatile oil from ginger on the murine B16 melanoma cells and its mechanism. Food Funct 2018; 9:1058-1069. [PMID: 29355275 DOI: 10.1039/c7fo01127j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this study, the inhibitory effects of volatile oil from ginger on melanogenesis and its antioxidant characteristics were investigated. The effects of volatile oil from ginger on cell proliferation, melanin content and tyrosinase activity were determined using a microplate reader. In addition, the expression of melanogenesis-related protein was determined by western blotting. The results indicate that the tested concentrates of volatile oil from ginger showed inhibitory effects on cell proliferation and melanogenesis. This revealed that volatile oil from ginger exhibited apparent capacities for scavenging ROS and lipid peroxidation. Furthermore, volatile oil from ginger improved the activities of GSH, SOD and CAT in B16 melanoma cells. These results demonstrated that volatile oil from ginger suppressed melanin synthesis through its antioxidant properties and the inhibitory effects on tyrosinase activity and melanogensis-related proteins. Hence, volatile oil from ginger could be used as an effective skin-whitening agent applied in food industry.
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Affiliation(s)
- Li-Xia Wang
- Key Laboratory of Food Nutrition and Safety, Ministry of Education; Tianjin University of Science and Technology, No. 29 The Thirteen Road, Tianjin 300457, China.
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16
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Sankari M, Rao PR, Hemachandran H, Pullela PK, Doss C GP, Tayubi IA, Subramanian B, Gothandam KM, Singh P, Ramamoorthy S. Prospects and progress in the production of valuable carotenoids: Insights from metabolic engineering, synthetic biology, and computational approaches. J Biotechnol 2018; 266:89-101. [DOI: 10.1016/j.jbiotec.2017.12.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 11/09/2017] [Accepted: 12/10/2017] [Indexed: 02/01/2023]
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17
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Thirumal Kumar D, Sneha P, Uppin J, Usha S, George Priya Doss C. Investigating the Influence of Hotspot Mutations in Protein–Protein Interaction of IDH1 Homodimer Protein: A Computational Approach. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2018; 111:243-261. [DOI: 10.1016/bs.apcsb.2017.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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19
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Sankari M, Hridya H, Sneha P, George Priya Doss C, Ramamoorthy S. Effect of UV radiation and its implications on carotenoid pathway in Bixa orellana L. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 176:136-144. [DOI: 10.1016/j.jphotobiol.2017.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 09/20/2017] [Accepted: 10/01/2017] [Indexed: 12/24/2022]
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20
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Protective effect of surface layer proteins isolated from four Lactobacillus strains on hydrogen-peroxide-induced HT-29 cells oxidative stress. Int J Biol Macromol 2017; 102:76-83. [DOI: 10.1016/j.ijbiomac.2017.03.160] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 01/02/2023]
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21
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Mohan S, Hemachandran H, Sneha P, George Priya Doss C, Godwin Christopher J, Jayaraman G, Ramamoorthy S. Structural insights into the binding mode and conformational changes of BSA induced by bixin and crocin. J Biomol Struct Dyn 2017; 36:2085-2098. [DOI: 10.1080/07391102.2017.1342565] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sankari Mohan
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Hridya Hemachandran
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - P. Sneha
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - C. George Priya Doss
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - J. Godwin Christopher
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Gurunathan Jayaraman
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Siva Ramamoorthy
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
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22
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Yin XJ, Geng CA, Chen XL, Sun CL, Yang TH, Li TZ, Zhou J, Zhang XM, Chen JJ. Synthesis and Cytotoxicity Evaluation of Tropinone Derivatives. NATURAL PRODUCTS AND BIOPROSPECTING 2017; 7:215-223. [PMID: 28321792 PMCID: PMC5397392 DOI: 10.1007/s13659-017-0124-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/12/2017] [Indexed: 06/06/2023]
Abstract
Sixteen tropinone derivatives were prepared, and their antitumor activities against five human cancer cells (HL-60, A-549, SMMC-7721, MCF-7 and SW480) were evaluated with MTS [3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxy methoxyphenyl)-2-(4-sulfopheny)-2H-tetrazolium] assay. Most of the derivatives exhibited better activities compared with tropinone at the concentration of 40 μM. Particularly, derivative 6 showed significant activities with IC50 values of 3.39, 13.59, 6.65, 13.09 and 12.38 μM respectively against HL-60, A-549, SMMC-7721, MCF-7 and SW480 cells, which suggested more potent activities than that of cis-dichlorodiamineplatinum (DDP).
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Affiliation(s)
- Xiu-Juan Yin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chang-An Geng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Xing-Long Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chang-Li Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Tong-Hua Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Tian-Ze Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Jun Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Xue-Mei Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Ji-Jun Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
- Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China.
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23
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Hemachandran H, Anantharaman A, Mohan S, Mohan G, Kumar DT, Dey D, Kumar D, Dey P, Choudhury A, George Priya Doss C, Ramamoorthy S. Unraveling the inhibition mechanism of cyanidin-3-sophoroside on polyphenol oxidase and its effect on enzymatic browning of apples. Food Chem 2017; 227:102-110. [PMID: 28274409 DOI: 10.1016/j.foodchem.2017.01.041] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 11/26/2016] [Accepted: 01/10/2017] [Indexed: 01/12/2023]
Abstract
The hunt for anti-browning agents in the food and agricultural industries aims to minimize nutritional loss and prolong post harvest storage. In the present study, the effect of cyanidin-3-sophoroside (CS) from Garcinia mangostana rind, on polyphenol oxidase (PPO) activity was investigated. The non-competitive inhibition mode of CS was determined by Lineweaver Burk plot. CS forms a ground-state complex by quenching the intrinsic fluorescence of PPO. The static quenching was temperature-dependent with an activation energy of 4.654±0.1091kJmol-1 to withstand the disruption of amino acid residues of the enzyme binding site. The enzyme conformational change was validated by 3D fluorescence and CD spectrum. Docking (binding energy -8.124kcal/mol) and simulation studies confirmed the binding pattern and stability. CS decreased PPO activity and browning index of fresh cut apples and prolonged the shelf life. Thus, CS appears to be a promising anti-browning agent to control enzymatic browning.
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Affiliation(s)
- Hridya Hemachandran
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Amrita Anantharaman
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Sankari Mohan
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | | | - D Thirumal Kumar
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Diksha Dey
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Drishty Kumar
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Priyanka Dey
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Amrita Choudhury
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - C George Priya Doss
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Siva Ramamoorthy
- School of Bio Sciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India.
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24
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Antimutagenic Compounds of White Shrimp (Litopenaeus vannamei): Isolation and Structural Elucidation. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 2016:8148215. [PMID: 27006678 PMCID: PMC4783554 DOI: 10.1155/2016/8148215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/13/2016] [Accepted: 01/20/2016] [Indexed: 01/19/2023]
Abstract
According to the World Health Organization, cancer is the main cause of mortality worldwide; thus, the search of chemopreventive compounds to prevent the disease has become a priority. White shrimp (Litopenaeus vannamei) has been reported as a source of compounds with chemopreventive activities. In this study, shrimp lipids were extracted and then fractionated in order to isolate those compounds responsible for the antimutagenic activity. The antimutagenic activity was assessed by the inhibition of the mutagenic effect of aflatoxin B1 on TA98 and TA100 Salmonella tester strains using the Ames test. Methanolic fraction was responsible for the highest antimutagenic activity (95.6 and 95.9% for TA98 and TA100, resp.) and was further separated into fifteen different subfractions (M1-M15). Fraction M8 exerted the highest inhibition of AFB1 mutation (96.5 and 101.6% for TA98 and TA100, resp.) and, after further fractionation, four subfractions M8a, M8b, M8c, and M8d were obtained. Data from (1)H and (13)C NMR, and mass spectrometry analysis of fraction M8a (the one with the highest antimutagenic activity), suggest that the compound responsible for its antimutagenicity is an apocarotenoid.
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