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Abstract
Polyphenolic esters (PEs) are valuable chemical compounds that display a wide spectrum of activities (e.g., anti-oxidative effects). As a result, their production through catalytic routes is an attractive field of research. The present review aims to discuss recent studies from the literature regarding the catalytic production of PEs from biomass feedstocks, namely, naturally occurred polyphenolic compounds. Several synthetic approaches are reported in the literature, mainly bio-catalysis and to a lesser extent acid catalysis. Immobilized lipases (e.g., Novozym 435) are the preferred enzymes thanks to their high reactivity, selectivity and reusability. Acid catalysis is principally investigated for the esterification of polyphenolic acids with fatty alcohols and/or glycerol, using both homogeneous (p-toluensulfonic acid, sulfonic acid and ionic liquids) and heterogeneous (strongly acidic cation exchange resins) catalysts. Based on the reviewed publications, we propose some suggestions to improve the synthesis of PEs with the aim of increasing the greenness of the overall production process. In fact, much more attention should be paid to the use of new and efficient acid catalysts and their reuse for multiple reaction cycles.
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Wang J, Han L, Wang D, Sun Y, Huang J, Shahidi F. Stability and stabilization of omega-3 oils: A review. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.09.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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3
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Liu J, Yu Y, Zhao Y, Jiang L, Zhou Y, Huang D, Xu L. Interrelation of cholesterol‐lowering, antioxidant activity and DNA damage protection to the different solvent extracts of mulberry (
Morus alba
L.). J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.14891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing Liu
- State Key Laboratory of Silkworm Genome Biology College of Biotechnology Southwest University Chongqing China
- Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Biotechnology Southwest University Chongqing China
| | - Yan Yu
- State Key Laboratory of Silkworm Genome Biology College of Biotechnology Southwest University Chongqing China
- Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Biotechnology Southwest University Chongqing China
| | - Yiping Zhao
- State Key Laboratory of Silkworm Genome Biology College of Biotechnology Southwest University Chongqing China
- Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Biotechnology Southwest University Chongqing China
| | - Liangyu Jiang
- State Key Laboratory of Silkworm Genome Biology College of Biotechnology Southwest University Chongqing China
- Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Biotechnology Southwest University Chongqing China
| | - You Zhou
- State Key Laboratory of Silkworm Genome Biology College of Biotechnology Southwest University Chongqing China
- Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Biotechnology Southwest University Chongqing China
| | - Dejian Huang
- Food Science and Technology Programme Department of Chemistry National University of Singapore Singapore Singapore
| | - Li Xu
- State Key Laboratory of Silkworm Genome Biology College of Biotechnology Southwest University Chongqing China
- Key Laboratory of Sericultural Biology and Genetic Breeding Ministry of Agriculture and Rural Affairs College of Biotechnology Southwest University Chongqing China
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Zhang S, Hyatt JR, Akoh CC. Solvent-free enzymatic synthesis of 1,2-dipalmitoylgalloylglycerol: Characterization and optimization of reaction condition. Food Chem 2020; 344:128604. [PMID: 33243556 DOI: 10.1016/j.foodchem.2020.128604] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 11/04/2020] [Accepted: 11/07/2020] [Indexed: 11/17/2022]
Abstract
A novel diacylglycerol-based galloyl structured lipid, 1,2-dipalmitoylgalloylglycerol (DPGG), was synthesized using the enzymatic transesterification of propyl gallate (PG) and tripalmitin under solvent-free condition. An immobilized and commercially available food-grade Candida antarctica lipase B, Lipozyme® 435, was used as the biocatalyst. The reaction variables that affect the yield of DPGG were optimized using a 33 full factorial design. At 70 °C, DPGG was obtained at a yield of 33.0 ± 2.0% with PG conversion at 44.8 ± 1.8% when the following condition was used: 25 substrate molar ratio of tripalmitin to PG, 120 h reaction time, and 25% enzyme load relative to the total substrate weight. The structure of reaction product was elucidated using Fourier-transform infrared spectroscopy (FT-IR), electrospray ionization high-resolution accurate-mass tandem mass spectrometry (ESI-HRAM-MS/MS), and 1D and 2D nuclear magnetic resonance spectroscopy (NMR). The effects of different lipases and galloyl donors/acceptors on the transesterification were also investigated.
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Affiliation(s)
- Siyu Zhang
- Department of Food Science and Technology, University of Georgia, Athens, GA, USA.
| | - Joseph R Hyatt
- Department of Food Science and Technology, University of Georgia, Athens, GA, USA.
| | - Casimir C Akoh
- Department of Food Science and Technology, University of Georgia, Athens, GA, USA.
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The Versatility of Antioxidant Assays in Food Science and Safety-Chemistry, Applications, Strengths, and Limitations. Antioxidants (Basel) 2020; 9:antiox9080709. [PMID: 32764410 PMCID: PMC7464350 DOI: 10.3390/antiox9080709] [Citation(s) in RCA: 158] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 07/29/2020] [Accepted: 07/31/2020] [Indexed: 01/09/2023] Open
Abstract
Currently, there is a growing interest in screening and quantifying antioxidants from biological samples in the quest for natural and effective antioxidants to combat free radical-related pathological complications. Antioxidant assays play a crucial role in high-throughput and cost-effective assessment of antioxidant capacities of natural products such as medicinal plants and food samples. However, several investigators have expressed concerns about the reliability of existing in vitro assays. Such concerns arise mainly from the poor correlation between in vitro and in vivo results. In addition, in vitro assays have the problem of reproducibility. To date, antioxidant capacities are measured using a panel of assays whereby each assay has its own advantages and limitations. This unparalleled review hotly disputes on in vitro antioxidant assays and elaborates on the chemistry behind each assay with the aim to point out respective principles/concepts. The following critical questions are also addressed: (1) What make antioxidant assays coloured? (2) What is the reason for working at a particular wavelength? (3) What are the advantages and limitations of each assay? and (4) Why is a particular colour observed in antioxidant–oxidant chemical reactions? Furthermore, this review details the chemical mechanism of reactions that occur in each assay together with a colour ribbon to illustrate changes in colour. The review ends with a critical conclusion on existing assays and suggests constructive improvements on how to develop an adequate and universal antioxidant assay.
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Synthesis of DHA/EPA Ethyl Esters via Lipase-Catalyzed Acidolysis Using Novozym® 435: A Kinetic Study. Catalysts 2020. [DOI: 10.3390/catal10050565] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
DHA/EPA ethyl ester is mainly used in the treatment of arteriosclerosis and hyperlipidemia. In this study, DHA+EPA ethyl ester was synthesized via lipase-catalyzed acidolysis of ethyl acetate (EA) with DHA+EPA concentrate in n-hexane using Novozym® 435. The DHA+EPA concentrate (in free fatty acid form), contained 54.4% DHA and 16.8% EPA, was used as raw material. A central composite design combined with response surface methodology (RSM) was used to evaluate the relationship between substrate concentrations and initial rate of DHA+EPA ethyl ester production. The results indicated that the reaction followed the ordered mechanism and as such, the ordered mechanism model was used to estimate the maximum reaction rate (Vmax) and kinetic constants. The ordered mechanism model was also combined with the batch reaction equation to simulate and predict the conversion of DHA+EPA ethyl ester in lipase-catalyzed acidolysis. The integral equation showed a good predictive relationship between the simulated and experimental results. 88–94% conversion yields were obtained from 100–400 mM DHA+EPA concentrate at a constant enzyme activity of 200 U, substrate ratio of 1:1 (DHA+EPA: EA), and reaction time of 300 min.
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Protection of natural antioxidants against low-density lipoprotein oxidation. ADVANCES IN FOOD AND NUTRITION RESEARCH 2020. [PMID: 32711864 DOI: 10.1016/bs.afnr.2020.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
This chapter reports essential information about the protective action of antioxidants against LDL oxidation. The activity of individual compounds (tocopherols, vitamin C, phenolic compounds) as well as extracts obtained from plant material (cereals, fruits, legumes, nuts, mushrooms, by-products of food industry) is reported. The structure-antioxidant activity relationship of phenolic compounds is discussed. This article summarizes the findings to date of both in vitro and in vivo studies using foods or phenolic extracts isolated from foodstuffs at inhibiting the incidence of LDL oxidation. This chapter summarizes also the reportings to date of in vivo studies using foods or beverages at inhibiting the incidence of LDL oxidation.
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Marrapu B, Ma J, Geng Z, Nalla S, Liu F, Li P, Wang D, Zhang M, Xu W. Chemo-enzymatic synthesis, characterization, in vitro antioxidant capacity and oxidative stability studies of novel phosphatidylcholines with ω-3/ω-6 PUFAs and phenolic acids. Food Res Int 2020; 131:109010. [PMID: 32247448 DOI: 10.1016/j.foodres.2020.109010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 01/14/2020] [Accepted: 01/15/2020] [Indexed: 12/16/2022]
Abstract
Novel phosphatidylcholines containing PUFAs and phenolic acids were synthesized from egg phosphatidylcholine (PC), PUFAs (docosahexaenoic, arachidonic and linoleic acids) and phenolic acids (caffeic, ferulic and p-coumaric acids) as substrates. The structures of modified PCs were confirmed by spectral analysis and were evaluated for antioxidant activities. The modified PCs containing caffeic and ferulic acids exhibited excellent antioxidant activities compared with butylated hydroxytoluene (BHT) and α-tocopherol. The synthesized compounds were also evaluated for the oxidative stabilities in liposome and organic solvent. The modified PCs showed more oxidative stable compared with standard PUFA-PCs and PUFA-PCs + BHT. Results showed that the oxidative stability decreased with increasing degree of unsaturation in organic solvent whereas in liposomes, increased with increasing degree of unsaturation due to tight packed configuration. In this study, phenolic acids were found to render protections for PUFAs in modified PCs from oxidation. Modified PCs may have great potential for applications in food, cosmetic and pharmaceutical industries.
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Affiliation(s)
- Balakrishna Marrapu
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China
| | - Jingjing Ma
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China
| | - Zhiming Geng
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
| | - Swapna Nalla
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China
| | - Fang Liu
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China; Qinghai Province Qinghai Lake Meat Industry Co., Ltd, Hainan 813099, PR China
| | - Pengpeng Li
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China
| | - Daoying Wang
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
| | - Muhan Zhang
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China
| | - Weimin Xu
- Institute of Agri-products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China; Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, Nanjing 210095, PR China
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Vázquez L, Corzo-Martínez M, Arranz-Martínez P, Barroso E, Reglero G, Torres C. Bioactive Lipids. BIOACTIVE MOLECULES IN FOOD 2019. [DOI: 10.1007/978-3-319-78030-6_58] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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10
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Enhanced synthesis of feruloylated acylglycerols by the lipase-catalyzed transesterification of glyceryl monoferulate with different acyl donors using ionic liquids as reaction solvents. J Biotechnol 2018; 280:31-37. [DOI: 10.1016/j.jbiotec.2018.05.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 05/18/2018] [Accepted: 05/30/2018] [Indexed: 11/18/2022]
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11
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Amarowicz R, Pegg RB. The Potential Protective Effects of Phenolic Compounds against Low-density Lipoprotein Oxidation. Curr Pharm Des 2018; 23:2754-2766. [PMID: 28356039 DOI: 10.2174/1381612823666170329142936] [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: 11/29/2016] [Accepted: 03/23/2017] [Indexed: 01/18/2023]
Abstract
BACKGROUND The exact mechanism(s) of atherosclerosis in humans remains elusive, but one theory hypothesizes that this deleterious process results from the oxidative modification of low-density lipoprotein (LDL). Research suggests that foods rich in dietary phenolic compounds with antioxidant activity can mitigate the extent of LDL oxidation in vivo. With regard to the different classes of flavonoids, there appears to be a structurefunction relationship between the various moieties/constituents attached to the flavonoids' three ring system and their impact at retarding LDL oxidation. METHODS This article summarizes the findings to date of both in vitro and in vivo studies using foods or phenolic extracts isolated from foodstuffs at inhibiting the incidence of LDL oxidation. Three bases: SCOPUS, Web Science, and PubMed were used for search. RESULTS An often used method for the determination of antioxidant properties of natural phenolic compounds is the LDL oxidation assay. LDLs are isolated from human plasma and their oxidation is induced by Cu2+ ions or 2,2'-azobis(2-methylpropionamidine) dihydrochloride (AAPH). The sample is incubated with a phenolic extract or individual/isolated phenolic compounds. LDL oxidation is then monitored by various chemical methods (e.g., measurement of the generation of conjugated dienes and trienes). This technique confirmed the antioxidant properties of several extracts as obtained from plant material (e.g., grapes, berries, orange, grapefruit, coffee, tea, chocolate, olives, nuts) as well as the individual phenolic compounds (e.g., luteolinidin, apigenidin, caffeic acid, chlorogenic acid, catechin, quercetin, rutin). Several studies in vivo confirmed protective effects of phenolic compounds against LDL oxidation. They covered the healthy subjects with hyperlipidaemia, overweight, obesity, metabolic syndrome, heavy smokers, patients receiving haemodialysis, patients with peripheral vascular disease, and subjects at high cardiovascular risk. The studies comprise individuals of all ages, and the number of participants in the different experiments varied widely. CONCLUSION Properly designed double-blind, placebo-controlled randomised clinical trials offer stronger evidence as to the impact of dietary phenolics consumption at retarding LDL oxidation. More such clinical trials are needed to strengthen the hypothesis that foods rich in dietary phenolic compounds with antioxidant activity can mitigate the extent of LDL oxidation in vivo.
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Affiliation(s)
- Ryszard Amarowicz
- Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima Street 10, 10-748 Olsztyn, Poland
| | - Ronald B Pegg
- Department of Food Science & Technology, The University of Georgia, 100 Cedar Street, Athens, GA, 30602-2610, United States
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Akanbi TO, Barrow CJ. Lipase-Produced Hydroxytyrosyl Eicosapentaenoate is an Excellent Antioxidant for the Stabilization of Omega-3 Bulk Oils, Emulsions and Microcapsules. Molecules 2018; 23:E275. [PMID: 29382165 PMCID: PMC6017098 DOI: 10.3390/molecules23020275] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 01/26/2018] [Accepted: 01/27/2018] [Indexed: 11/16/2022] Open
Abstract
In this study, several lipophilic hydroxytyrosyl esters were prepared enzymatically using immobilized lipase from Candida antarctica B. Oxidation tests showed that these conjugates are excellent antioxidants in lipid-based matrices, with hydroxytyrosyl eicosapentaenoate showing the highest antioxidant activity. Hydroxytyrosyl eicosapentaenoate effectively stabilized bulk fish oil, fish-oil-in-water emulsions and microencapsulated fish oil. The stabilizing effect of this antioxidant may either be because it orients itself with the omega-3 fatty acids in the oil, thereby protecting them against oxidation, or because this unstable fatty acid can preferentially oxidise, thus providing an additional mechanism of antioxidant protection. Hydroxytyrosyl eicosapentaenoate itself was stable for one year when stored at -20 °C.
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Affiliation(s)
- Taiwo Olusesan Akanbi
- Centre for Chemistry and Biotechnology, Deakin University, Locked Bag 20000, Geelong, VIC 3220, Australia.
| | - Colin James Barrow
- Centre for Chemistry and Biotechnology, Deakin University, Locked Bag 20000, Geelong, VIC 3220, Australia.
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Anankanbil S, Pérez B, Yang J, Banerjee C, Guo Z. A novel array of interface-confined molecules: Assembling natural segments for delivery of multi-functionalities. J Colloid Interface Sci 2017; 508:230-236. [DOI: 10.1016/j.jcis.2017.08.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 08/14/2017] [Accepted: 08/16/2017] [Indexed: 12/30/2022]
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Sun Y, Zhou D, Shahidi F. Antioxidant properties of tyrosol and hydroxytyrosol saturated fatty acid esters. Food Chem 2017; 245:1262-1268. [PMID: 29287352 DOI: 10.1016/j.foodchem.2017.11.051] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 11/03/2017] [Accepted: 11/14/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Yuanxin Sun
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada
| | - Dayong Zhou
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada; School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China
| | - Fereidoon Shahidi
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada.
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15
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Zhou DY, Sun YX, Shahidi F. Preparation and antioxidant activity of tyrosol and hydroxytyrosol esters. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.06.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Durand E, Jacob RF, Sherratt S, Lecomte J, Baréa B, Villeneuve P, Mason RP. The nonlinear effect of alkyl chain length in the membrane interactions of phenolipids: Evidence by X-ray diffraction analysis. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201600397] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | | | - Bruno Baréa
- CIRAD, UMR IATE; F-34060, Montpellier France
| | | | - R. Preston Mason
- CIRAD, UMR IATE; F-34060, Montpellier France
- Elucida Research; Beverly MA
- Cardiovascular Division, Department of Medicine; Brigham and Women's Hospital, Harvard Medical School; Boston MA
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Balakrishna M, Kaki SS, Karuna MSL, Sarada S, Kumar CG, Prasad RBN. Synthesis and in vitro antioxidant and antimicrobial studies of novel structured phosphatidylcholines with phenolic acids. Food Chem 2016; 221:664-672. [PMID: 27979256 DOI: 10.1016/j.foodchem.2016.11.121] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 11/19/2016] [Accepted: 11/22/2016] [Indexed: 11/26/2022]
Abstract
Novel phenoylated phosphatidylcholines were synthesized from 1,2-dipalmitoyl phosphatidylcholine/egg 1,2-diacyl phosphatidylcholine and phenolic acids such as ferulic, sinapic, vanillic and syringic acids. The structures of phenoylated phosphatidylcholines were confirmed by spectral analysis. 2-acyl-1-lyso phosphatidylcholine was synthesized from phosphatidylcholine via regioselective enzymatic hydrolysis and was reacted with hydroxyl protected phenolic acids to produce corresponding phenoylated phosphatidylcholines in 48-56% yields. Deprotection of protected phenoylated phosphatidylcholines resulted in phenoylated phosphatidylcholines in 87-94% yields. The prepared compounds were evaluated for their preliminary in vitro antimicrobial and antioxidant activities. Among the active derivatives, compound 1-(4-hydroxy-3,5-dimethoxy) cinnamoyl-2-acyl-sn-glycero-3-phosphocholine exhibited excellent antioxidant activity with EC50 value of 16.43μg/mL. Compounds 1-(4-hydroxy-3-methoxy) cinnamoyl-2-acyl-sn-glycero-3-phosphocholine and 1-(4-hydroxy-3,5-dimethoxy) cinnamoyl-2-palmitoyl-sn-glycero-3-phosphocholine exhibited good antioxidant activity with EC50 values of 36.05 and 33.35μg/mL respectively. Compound 1-(4-hydroxy-3-methoxy) cinnamoyl-2-palmitoyl-sn-glycero-3-phosphocholine exhibited good antibacterial activity against Klebsiella planticola with MIC of 15.6μg/mL and compound 1-(4-hydroxy-3-methoxy) benzoyl-2-acyl-sn-glycero-3-phosphocholine exhibited good antifungal activity against Candida albicans with MIC of 15.6μg/mL.
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Affiliation(s)
- Marrapu Balakrishna
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - Shiva Shanker Kaki
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - Mallampalli S L Karuna
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - Sripada Sarada
- Medicinal Chemistry and Pharmacology Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - C Ganesh Kumar
- Medicinal Chemistry and Pharmacology Division, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India
| | - R B N Prasad
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India; Academy of Scientific and Innovative Research, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, India.
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Ma Z, Zheng S, Han H, Meng J, Yang X, Zeng S, Zhou H, Jiang H. The bioactive components of Coreopsis tinctoria (Asteraceae) capitula: Antioxidant activity in vitro and profile in rat plasma. J Funct Foods 2016. [DOI: 10.1016/j.jff.2015.11.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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19
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Shahidi F. Omega-3 fatty acids and marine oils in cardiovascular and general health: A critical overview of controversies and realities. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.09.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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20
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Joseph LR, Tata BVR, Sreejith L. Crystalline fibrillar gel formation in aqueous surfactant-antioxidant system. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2015; 38:84. [PMID: 26248701 DOI: 10.1140/epje/i2015-15084-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 04/14/2015] [Accepted: 06/03/2015] [Indexed: 06/04/2023]
Abstract
Cetyltrimethylammonium bromide (CTAB) is a well-known cationic surfactant capable to micellize into diverse morphologies in aqueous medium. We observed the formation of an opaque gel state from aqueous CTAB solution in the presence of the aromatic additive, para-coumaric acid (PCA). Optical microscopic images revealed the presence of large fibrils in the system at room temperature. Gel nature of the fibrils was confirmed by rheological measurements. Presence of interstitial water in the fibrils was recognized with Raman spectroscopy. On heating the sample above 30 (°) C, the fibrillar gel state changes to a transparent liquid state with Newtonian flow properties. Dynamic light scattering study hinted the presence of small micelles in the solution above 30 (°) C. Thus the system showed a temperature-dependent structural transition from opaque water-swollen gel to transparent micellar liquid. The formation of water-swollen fibrillar network is attributed to surfactant-additive intermolecular interactions in aqueous medium. Transition to micelle phase above 30 (°) C is related to Kraft transition which is observed at significantly lower temperature for CTAB in the absence of PCA. The structural features of PCA play a key role in promoting fibrillar network formation and elevating the Kraft transition in aqueous solution of CTAB.
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Affiliation(s)
- Linet Rose Joseph
- Soft Materials Research Laboratory, Department of Chemistry, National Institute of Technology, Calicut, India
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Amburana cearensis leaf extract maintains survival and promotes in vitro development of ovine secondary follicles. ZYGOTE 2015; 24:277-85. [PMID: 26083197 DOI: 10.1017/s0967199415000179] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The antioxidant properties of Amburana cearensis extract may be a useful substitute for standard cell culture medium. Thus, the aim of this study was to evaluate the effect of this extract, with or without supplementation, on in vitro survival and development of sheep isolated secondary follicles. After collection of the ovaries, secondary follicles were isolated and cultured for 18 days in α-MEM+ supplemented with bovine serum albumin, insulin, transferrin, selenium, glutamine, hypoxanthine and ascorbic acid (control medium) or into medium composed of different concentrations of A. cearensis extract without supplements (Amb 0.1; 0.2 or 0.4 mg/ml) or A. cearensis extract supplemented with the same substances described above for α-MEM+ supplementation. The A. cearensis supplemented medium was named Amb 0.1+; 0.2+ or 0.4+ mg/ml. There were more morphologically normal follicles in Amb 0.1 or Amb 0.4 mg/ml than in the control medium (α-MEM+) after 18 days of culture. Moreover, the percentage of antrum formation was significantly higher in Amb 0.1 or Amb 0.2 mg/ml than in α-MEM+ and Amb 0.1+ mg/ml, and similar to the other treatments. All A. cearensis extract media induced a progressive and significant increase in follicular diameter throughout the culture period. In conclusion, this study showed that 0.1 mg/ml of this extract, without supplementation, maintains follicular survival and promotes the development of ovine isolated secondary follicles in vitro. This extract can be an alternative culture medium for preantral follicle development.
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Durand E, Bayrasy C, Laguerre M, Barouh N, Lecomte J, Durand T, Balas L, Wrutniak-Cabello C, Cabello G, Villeneuve P. Regioselective synthesis of diacylglycerol rosmarinates and evaluation of their antioxidant activity in fibroblasts. EUR J LIPID SCI TECH 2015. [DOI: 10.1002/ejlt.201400607] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | - Thierry Durand
- Institut des Biomolécules Max Mousseron; Montpellier France
| | - Laurence Balas
- Institut des Biomolécules Max Mousseron; Montpellier France
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