1
|
Shirai A, Tanaka A. Effects of ferulic acid combined with light irradiation on deoxynivalenol and its production in Fusarium graminearum. Fungal Biol 2024; 128:1684-1690. [PMID: 38575241 DOI: 10.1016/j.funbio.2024.02.003] [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: 09/29/2023] [Revised: 02/08/2024] [Accepted: 02/09/2024] [Indexed: 04/06/2024]
Abstract
This study aimed to investigate the effects of ferulic acid (FA), a natural phenolic phytochemical, in combination with light irradiation at three wavelengths (365, 385 and 405 nm) on the concentration and toxicity of deoxynivalenol (DON), a mycotoxin produced by Fusarium graminearum. Moreover, this study examined the influence of the combination treatment on DON production in the cultured fungus. FA activated by light at a peak wavelength of 365 nm exhibited the most effective decrease in DON concentration of the tested wavelengths; a residual DON ratio of 0.23 at 24 h exposure was observed, compared with the initial concentration. The reduction in DON using 365-nm light was dependent on the concentration of FA, with a good correlation (r2 = 0.979) between the rate constants of DON decrease and FA concentration, which was confirmed by a pseudo-first-order kinetics analysis of the photoreaction with different FA concentrations (50-400 mg/L) for 3 h. The viability of HepG2 cells increased by 56.7% following in vitro treatment with a mixture containing the photoproducts obtained after treatment with 20 mg/L DON and 200 mg/L FA under 365-nm irradiation for 6 h. These results suggested that the photoreaction of FA under 365-nm irradiation induces the detoxification of DON through degradation or modification of DON. The antifungal effects of the combination (FA and 365-nm light) on F. graminearum were investigated. Conidia treated with the combination did not show additive or synergistic inhibition of fungal biomass and DON production in 7-day cultivated fungal samples compared with samples after single treatment. However, successive treatment, composed of 90 min irradiation at 365 nm and then treatment with 200 mg/L FA for 90 min in the dark, suppressed fungal growth and DON yield to 70% and 25% of the untreated sample level, respectively. This photo-technology involving the two treatment methods of 365-nm irradiation and FA addition as a food-grade phenolic acid in combination or successively, can aid in developing alternative approaches to eliminate fungal contaminants in the fields of environmental water and agriculture. However, further research is required to explore the underlying mechanisms of DON decontamination and its biosynthesis in F. graminearum.
Collapse
Affiliation(s)
- Akihiro Shirai
- Division of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minami-Josanjima, Tokushima, 770-8513, Japan; Institute of Post-LED Photonics, Tokushima University, 2-1 Minami-Josanjima, Tokushima, 770-8506, Japan.
| | - Ami Tanaka
- Division of Bioresource Science, Graduate School of Sciences and Technology for Innovation, Tokushima University, 2-1 Minami-Josanjima, Tokushima, 770-8506, Japan
| |
Collapse
|
2
|
Lan J, Ji S, Yang C, Cai G, Lu J, Li X. Extracellular Expression of Feruloyl Esterase and Xylanase in Escherichia coli for Ferulic Acid Production from Agricultural Residues. Microorganisms 2023; 11:1869. [PMID: 37630429 PMCID: PMC10456899 DOI: 10.3390/microorganisms11081869] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023] Open
Abstract
There is still a large amount of ferulic acid (FA), an outstanding antioxidant, present in agricultural residues. Enzymatic hydrolysis has been regarded as the most effective way to release FA. This present study therefore selected feruloyl esterase (FAE) and xylanase (XYN) from the metagenomes of a cow rumen and a camel rumen, respectively, for their recombinant expression in Escherichia coli BL21 and further application in releasing FA. After screening the candidate signal peptides, the optimal one for each enzyme, which were selected as SP1 and SP4, respectively, was integrated into the vectors pET22b(+) and pETDuet-1. Among the generated E. coli strains SP1-F, SP4-X, and SP1-F-SP4-X that could express extracellular enzymes either separately or simultaneously, the latter one performed the best in relation to degrading the biomass and releasing FA. Under the optimized culture and induction conditions, the strain SP1-F-SP4-X released 90% of FA from 10% of de-starched wheat bran and produced 314.1 mg/L FA, which was deemed to be the highest obtained value to the best of our knowledge. This result could pave a way for the re-utilization of agricultural residues and enhancing their add-value.
Collapse
Affiliation(s)
- Jiaxin Lan
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; (J.L.); (S.J.); (C.Y.); (G.C.); (J.L.)
| | - Shujie Ji
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; (J.L.); (S.J.); (C.Y.); (G.C.); (J.L.)
| | - Chuanjia Yang
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; (J.L.); (S.J.); (C.Y.); (G.C.); (J.L.)
| | - Guolin Cai
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; (J.L.); (S.J.); (C.Y.); (G.C.); (J.L.)
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Jian Lu
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; (J.L.); (S.J.); (C.Y.); (G.C.); (J.L.)
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | - Xiaomin Li
- School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; (J.L.); (S.J.); (C.Y.); (G.C.); (J.L.)
- National Engineering Research Center of Cereal Fermentation and Food Biomanufacturing, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| |
Collapse
|
3
|
Dong X, Zhao D. Ferulic acid as a therapeutic agent in depression: Evidence from preclinical studies. CNS Neurosci Ther 2023. [PMID: 37183361 PMCID: PMC10401106 DOI: 10.1111/cns.14265] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 04/17/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023] Open
Abstract
Depression is a common but severe mood disorder with a very high prevalence across the general population. Depression is of global concern and poses a threat to human physical and mental health. Ferulic acid (FA) is a natural active ingredient that has antioxidative, anti-inflammatory, and free radical scavenging properties. Furthermore, studies have shown that FA can exert antidepressant effects through a variety of mechanisms. The aim of the review was to comprehensively elucidate the mechanisms in FA that alleviate depression using animal models. The in vivo (animal) studies on the mechanism of FA treatment of depression were searched in PubMed, Chinese National Knowledge Infrastructure, Baidu academic, and Wan fang databases. Thereafter, the literature conclusions were summarized accordingly. Ferulic acid was found to significantly improve the depressive-like behaviors of animal models, suggesting that FA is a potential natural product in the treatment of depression. The mechanisms are achieved by enhancing monoamine oxidase A (MOA) activity, inhibiting microglia activation and inflammatory factor release, anti-oxidative stress, promoting hippocampal nerve regeneration, increasing brain-derived neurotrophic factor secretion, regulating gut microbiome, and activating protein kinase B/collapsin response mediator protein 2 (AKT/CRMP2) signaling pathway. Ferulic acid produces significant antidepressant effects in animal depression models through various mechanisms, suggesting its potential value as a treatment of depression. However, clinical research trials involving FA are required further to provide a solid foundation for its clinical application.
Collapse
Affiliation(s)
- Xiaoyu Dong
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| | - Dongxue Zhao
- Department of Neurology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China
| |
Collapse
|
4
|
Lin Q, Aihara M, Shirai A, Tanaka A, Takebayashi K, Yoshimura N, Torigoe N, Nagahara M, Minamikawa T, Otoi T. Porcine embryo development and inactivation of microorganisms after ultraviolet-C irradiation at 228 nm. Theriogenology 2023; 197:252-258. [PMID: 36525864 DOI: 10.1016/j.theriogenology.2022.12.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/07/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
It is important to prevent contamination inside the incubator as a method of preventing microbial infections during the embryo culture. In the present study, we examined the effects of ultraviolet-C (UV-C) irradiation, used for microorganism inactivation, on embryo development and the growth of bacteria, including Escherichia coli and Staphylococcus aureus, and the fungus Cladosporium cladosporioides. In the embryo irradiation experiment, we examined the effects of the plastic lid of the culture dish, irradiation distances (10, 20, and 25 cm), and different irradiation wavelengths (228 and 260 nm) during embryo culture for 7 days on the development and quality of porcine in vitro-fertilized embryos. None of the embryos cultured in dishes without plastic lids developed into blastocysts after irradiation with 228 nm UV-C. When porcine embryos were cultured in a culture dish with lids, the 228 nm UV-C irradiation decreased blastocyst formation rates of the embryos but not their quality, irrespective of the UV-C irradiation distance. Moreover, irradiation with 260 nm UV-C, even with plastic lids, had more detrimental effects on embryo development than irradiation with 228 nm UV-C. Investigation of the inactivating effects of UV-C irradiation at 228 nm and 260 nm on the growth of the bacteria and fungus showed that 260 nm UV-C reduced the viability to a greater extent than 228 nm UV-C. Moreover, the disinfection efficacy for the bacteria increased when the irradiation duration increased and the distance decreased. In conclusion, porcine embryos can develop into blastocysts without loss of quality even after continuous long-duration irradiation (7 days) with 228 nm UV-C, which can inactivate the growth of bacteria and the tested fungus; however, the development rate of the embryo is reduced.
Collapse
Affiliation(s)
- Qingyi Lin
- Bio-Innovation Research Center, Tokushima University, Tokushima, Japan; Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Mutsumi Aihara
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Akihiro Shirai
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Japan
| | - Ami Tanaka
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Japan
| | - Koki Takebayashi
- Bio-Innovation Research Center, Tokushima University, Tokushima, Japan; Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Naoaki Yoshimura
- Bio-Innovation Research Center, Tokushima University, Tokushima, Japan; Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Nanaka Torigoe
- Bio-Innovation Research Center, Tokushima University, Tokushima, Japan; Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Megumi Nagahara
- NOSAI Yamagata Central Veterinary Clinic Center, 9902171, Yamagata, Japan
| | - Takeo Minamikawa
- Division of Interdisciplinary Researches for Medicine and Photonics, Institute of Post-LED Photonics, Tokushima University, Tokushima, Japan
| | - Takeshige Otoi
- Bio-Innovation Research Center, Tokushima University, Tokushima, Japan; Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan.
| |
Collapse
|
5
|
Wang J, Chen J, Sun Y, He J, Zhou C, Xia Q, Dang Y, Pan D, Du L. Ultraviolet-radiation technology for preservation of meat and meat products: Recent advances and future trends. Food Control 2023. [DOI: 10.1016/j.foodcont.2023.109684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
|
6
|
Shirai A, Kawasaka K, Tsuchiya K. Antimicrobial action of phenolic acids combined with violet 405-nm light for disinfecting pathogenic and spoilage fungi. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 229:112411. [PMID: 35219030 DOI: 10.1016/j.jphotobiol.2022.112411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 02/03/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
The aim of this study is to investigate the fungicidal spectrum of six phenolic-cinnamic and -benzoic acid derivatives using four fungi, Aspergillus niger, Cladosporium cladosporioides, Trichophyton mentagrophytes and Candida albicans, in a photocombination system with violet 405-nm light. This is the first study to examine the fungicidal mechanism involving oxidative damage using the conidium of A. niger, as well as an assessment of cellular function and chemical characteristics. The results of the screening assay indicated that ferulic acid (FA) and vanillic acid (VA), which possess 4-hydroxyl and 3-methoxy groups in their phenolic acid structures, produced synergistic activity with 405-nm light irradiation. FA and VA (5.0 mM) significantly decreased the viability of A. niger by 2.4 to 2.6-logs under 90-min irradiation. The synergistic effects were attenuated by the addition of the radical scavenger dimethyl sulfoxide. Generation of reactive oxygen species (ROS), such as hydrogen peroxide and hydroxyl radicals, were confirmed in the phenolic acid solutions tested after irradiation with colorimetric and electron spin resonance analyses. Adsorption of FA and VA to conidia was greater than other tested phenolic acids, and produced 1.55- and 1.85-fold elevation of intracellular ROS levels, as determined using an oxidant-sensitive probe with flow cytometry analysis. However, cell wall or membrane damage was not the main mechanism by which the combination-induced fungal death was mediated. Intracellular ATP was drastically diminished (5% of control levels) following combined treatment with FA and light exposure, even under a condition that produced negligible decreases in viability, thereby resulting in pronounced growth delay. These results suggest that the first stage in the photofungicidal mechanism is oxidative damage to mitochondria or the cellular catabolism system associated with ATP synthesis, which is a result of the photoreaction of phenolic acids adsorbed and internalized by conidia. This photo-technology in combination with food-grade phenolic acids can aid in developing alternative approaches for disinfection of pathogenic and spoilage fungi in the fields of agriculture, food processing and medical care.
Collapse
Affiliation(s)
- Akihiro Shirai
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minami-Josanjima, Tokushima 770-8513, Japan; Institute of Post-LED Photonics, Tokushima University, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan.
| | - Kaito Kawasaka
- Graduate School of Sciences and Technology for Innovation, Tokushima University, 2-1 Minami-Josanjima, Tokushima 770-8506, Japan.
| | - Koichiro Tsuchiya
- Department of Medical Pharmacology, Institute of Biomedical Sciences, Graduate School of Tokushima University, 1-78-1 Sho-machi, Tokushima 770-8505, Japan.
| |
Collapse
|
7
|
SHIRAI AKIHIRO, YASUTOMO YUKO, KANNO YUKA. Effects of Violet-Blue Light-Emitting Diode on Controlling Bacterial Contamination in Boiled Young Sardine. Biocontrol Sci 2022; 27:9-19. [DOI: 10.4265/bio.27.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- AKIHIRO SHIRAI
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University
| | - YU-KO YASUTOMO
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University
| | - YUKA KANNO
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University
| |
Collapse
|
8
|
Shirai A, Kunimi H, Tsuchiya K. Antifungal action of the combination of ferulic acid and ultraviolet-A irradiation against Saccharomyces cerevisiae. J Appl Microbiol 2021; 132:2957-2967. [PMID: 34894031 DOI: 10.1111/jam.15407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/19/2021] [Accepted: 12/07/2021] [Indexed: 11/28/2022]
Abstract
AIMS To examine the antifungal action of photocombination treatment with ferulic acid (FA) and ultraviolet-A (UV-A) light (wavelength, 365 nm) by investigating associated changes in cellular functions of Saccharomyces cerevisiae. METHODS AND RESULTS When pre-incubation of yeast cells with FA was extended from 0.5 to 10 min, its photofungicidal activity increased. Flow cytometry analysis of stained live and dead cells revealed that 10-min UV-A exposure combined with FA (1 mg ml-1 ) induced a ~99.9% decrease in cell viability although maintaining cell membrane integrity when compared with pre-exposure samples. When morphological and biochemical analysis were performed, treated cells exhibited an intact cell surface and oxidative DNA damage similar to control cells. Photocombination treatment induced cellular proteins oxidation, as shown by 2.3-fold increasing in immunostaining levels of ~49-kDa carbonylated proteins compared with pre-irradiation samples. Pyruvate kinase 1 (PK1) was identified by proteomics analysis as a candidate protein whose levels was affected by photocombination treatment. Moreover, intracellular ATP levels decreased following FA treatment both in darkness and with UV-A irradiation, thus suggesting a possible FA-induced delay in cell growth. CONCLUSIONS FA functions within the cytoplasmic membrane; addition of UV-A exposure induces increased oxidative modifications of cytosolic proteins such as PK1, which functions in ATP generation, without causing detectable genotoxicity, thus triggering inactivation of yeast cells. SIGNIFICANCE AND IMPACT OF THE STUDY Microbial contamination is a serious problem that diminishes the quality of fruits and vegetables. Combining light exposure with food-grade phenolic acids such as FA is a promising disinfection technology for applications in agriculture and food processing. However, the mode of photofungicidal action of FA with UV-A light remains unclear. This study is the first to elucidate the mechanism using S. cerevisiae. Moreover, proteomics analyses identified a specific cytosolic protein, PK1, which is oxidatively modified by photocombination treatment.
Collapse
Affiliation(s)
- Akihiro Shirai
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan.,Institute of Post-LED Photonics, Tokushima University, Tokushima, Japan
| | - Haruka Kunimi
- Graduate School of Advanced Technology and Science, Tokushima University, Tokushima, Japan
| | - Koichiro Tsuchiya
- Department of Medical Pharmacology, Institute of Biomedical Sciences, Graduate School of Tokushima University, Tokushima, Japan
| |
Collapse
|
9
|
Evaluating Feruloyl Esterase—Xylanase Synergism for Hydroxycinnamic Acid and Xylo-Oligosaccharide Production from Untreated, Hydrothermally Pre-Treated and Dilute-Acid Pre-Treated Corn Cobs. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10050688] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Agricultural residues are considered the most promising option as a renewable feedstock for biofuel and high valued-added chemical production due to their availability and low cost. The efficient enzymatic hydrolysis of agricultural residues into value-added products such as sugars and hydroxycinnamic acids is a challenge because of the recalcitrant properties of the native biomass. Development of synergistic enzyme cocktails is required to overcome biomass residue recalcitrance, and achieve high yields of potential value-added products. In this study, the synergistic action of two termite metagenome-derived feruloyl esterases (FAE5 and FAE6), and an endo-xylanase (Xyn11) from Thermomyces lanuginosus, was optimized using 0.5% (w/v) insoluble wheat arabinoxylan (a model substrate) and then applied to 1% (w/v) corn cobs for the efficient production of xylo-oligosaccharides (XOS) and hydroxycinnamic acids. The enzyme combination of 66% Xyn11 and 33% FAE5 or FAE6 (protein loading) produced the highest amounts of XOS, ferulic acid, and p-coumaric acid from untreated, hydrothermal, and acid pre-treated corn cobs. The combination of 66% Xyn11 and 33% FAE6 displayed an improvement in reducing sugars of approximately 1.9-fold and 3.4-fold for hydrothermal and acid pre-treated corn cobs (compared to Xyn11 alone), respectively. The hydrolysis product profiles revealed that xylobiose was the dominant XOS produced from untreated and pre-treated corn cobs. These results demonstrated that the efficient production of hydroxycinnamic acids and XOS from agricultural residues for industrial applications can be achieved through the synergistic action of FAE5 or FAE6 and Xyn11.
Collapse
|
10
|
Inactivation of Salmonella spp. in wheat flour by 395 nm pulsed light emitting diode (LED) treatment and the related functional and structural changes of gluten. Food Res Int 2020; 127:108716. [DOI: 10.1016/j.foodres.2019.108716] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/20/2019] [Accepted: 09/28/2019] [Indexed: 11/23/2022]
|
11
|
Prasad A, Gänzle M, Roopesh MS. Inactivation of Escherichia Coli and Salmonella Using 365 and 395 nm High Intensity Pulsed Light Emitting Diodes. Foods 2019; 8:foods8120679. [PMID: 31847186 PMCID: PMC6963940 DOI: 10.3390/foods8120679] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/10/2019] [Accepted: 12/10/2019] [Indexed: 11/21/2022] Open
Abstract
High intensity pulsed light emitting diode (LED) treatment is a novel approach to inactivate foodborne pathogens. The objective of this study was to evaluate the antibacterial potential of high intensity 365 (UV-A) and 395 nm (NUV-Vis) LED treatments against Escherichia coli and Salmonella enterica at high and low water activity (aw) conditions, and to understand the influence of different process parameters on their antibacterial efficacy. Bacteria at high (in phosphate buffer saline, PBS) and low aw (aw = 0.75) conditions were treated with both the LEDs with specific doses at a fixed distance from the LEDs. The 365 nm LED showed more effectiveness in reducing the dried bacteria compared to 395 nm LED. The dry E. coli showed more resistance to LED treatments compared to Salmonella. The 365 and 395 nm LED treatments with ~658 J/cm2 dose resulted in reductions of 0.79 and 1.76 log CFU/g of Salmonella, respectively, on 0.75 aw pet foods. The LED treatments increased the surface temperature, resulting in water loss in the treated samples. This study showed that the dose, duration of light exposure, bacterial strain, and aw played a major role in the antibacterial efficacy of the 365 and 395 nm LEDs.
Collapse
Affiliation(s)
- Amritha Prasad
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada; (A.P.); (M.G.)
| | - Michael Gänzle
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada; (A.P.); (M.G.)
- College of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430086, China
| | - M. S. Roopesh
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB T6G 2R3, Canada; (A.P.); (M.G.)
- Correspondence: ; Tel.: +1-780-492-8413
| |
Collapse
|
12
|
Highly Efficient Extraction of Ferulic Acid from Cereal Brans by a New Type A Feruloyl Esterase from Eupenicillium parvum in Combination with Dilute Phosphoric Acid Pretreatment. Appl Biochem Biotechnol 2019; 190:1561-1578. [PMID: 31792788 DOI: 10.1007/s12010-019-03189-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 11/11/2019] [Indexed: 12/13/2022]
Abstract
Feruloyl esterase (FAE) is a critical enzyme in bio-extraction of ferulic acid (FA) from plant cell wall. A new FAE (EpFAE1) encoding gene was isolated from Eupenicillium parvum and heterologously expressed in Pichia pastoris cells. Based on phylogenetic tree analysis, the protein EpFAE1 belongs to type A of the seventh FAE subfamily. Using methyl ferulate as substrate, the optimum temperature and pH for the catalytic activity of EpFAE1 were 50 °C and 5.5, respectively. The enzyme exhibited high stability at 50 °C, in a wide pH range (3.0-11.0), or in the presence of 2 M of NaCl. Together with the endo-xylanase EpXYN1, EpFAE1 released 72.32% and 4.00% of the alkali-extractable FA from de-starched wheat bran (DSWB) or de-starched corn bran (DSCB), respectively. Meanwhile, the substrates were pretreated with 1.75% (for DSWB) or 1.0% (for DSCB) of phosphoric acid (PA) at 90 °C for 12 h, followed by enzymatic hydrolysis of the soluble and insoluble fractions. The release efficiencies of FA were up to 84.64% for DSWB and 66.73% for DSCB. Combined dilute PA pretreatment with enzymatic hydrolysis is a low-cost and highly efficient method for the extraction of FA from cereal brans.
Collapse
|
13
|
Jeong YJ, Ha JW. Simultaneous Effects of UV-A and UV-B Irradiation on the Survival of Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in Buffer Solution and Apple Juice. J Food Prot 2019; 82:2065-2070. [PMID: 31714805 DOI: 10.4315/0362-028x.jfp-19-131] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this study was to evaluate the efficacy of simultaneous UV-A and UV-B irradiation (UV-A+B) for inactivating Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in both phosphate-buffered saline (PBS) and apple juice. A cocktail of the three pathogens was inoculated into PBS and apple juice, and then the suspensions were irradiated with UV lamps of 356 nm (UV-A) and 307 nm (UV-B). Significant (P < 0.05) log reductions of the three pathogens in PBS and apple juice were observed after a maximum dose of UV-B alone or the UV-A+B treatment, but few reductions were observed upon UV-A treatment alone. At all irradiation times, antagonistic effects were observed for the application of UV-A+B against in E. coli O157:H7, Salmonella Typhimurium, and L. monocytogenes in PBS and apple juice. The degree of antagonistic effect in apple juice was greater than that in PBS. The results of this study suggest that the combined treatment of commercial UV-A and UV-B lamps would be impractical for disinfecting juice products.
Collapse
Affiliation(s)
- Yoon-Jae Jeong
- Department of Food Science and Biotechnology, College of Engineering, Global K-Food Research Center, Hankyong National University, Anseong-si 17579, South Korea (ORCID: https://orcid.org/0000-0003-2097-7241 [J.-W.H.])
| | - Jae-Won Ha
- Department of Food Science and Biotechnology, College of Engineering, Global K-Food Research Center, Hankyong National University, Anseong-si 17579, South Korea (ORCID: https://orcid.org/0000-0003-2097-7241 [J.-W.H.])
| |
Collapse
|
14
|
Enhanced bacterial inactivation in apple juice by synergistic interactions between phenolic acids and mild food processing technologies. INNOV FOOD SCI EMERG 2019. [DOI: 10.1016/j.ifset.2019.102186] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
15
|
Shirai A, Yasutomo YK. Bactericidal action of ferulic acid with ultraviolet-A light irradiation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 191:52-58. [PMID: 30580185 DOI: 10.1016/j.jphotobiol.2018.12.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/06/2018] [Accepted: 12/09/2018] [Indexed: 11/19/2022]
Abstract
The bactericidal activity of ferulic acid (FA) against various microorganisms was remarkably enhanced by ultraviolet-A (UV-A) irradiation (wavelength, 365 nm). However, the bactericidal mechanism in the photo-combination system has not been evaluated. In the present study, this combined treatment was characterized by investigating associated changes in cellular functions of Escherichia coli, including assessments of respiratory activity, lipid peroxidation, membrane permeability, and damage to DNA and the cell surface. FA adsorbed onto and was incorporated into bacterial membranes, and the affinity resulted in decreased respiratory activity and enhanced lipid peroxidation in the cytoplasmic membrane with low-fluence (1.0 J/cm2) UV-A irradiation. Flow cytometry analysis revealed that additional exposure (8 J/cm2) combined with FA (1 mg/mL) induced increased cell permeability, yielding a 4.8-log decrease in the viable cell count. Morphologically, the treated cells exhibited a bacterial membrane dysfunction, producing many vesicles on the cell surface. However, despite this effect on the cell surface, plasmid DNA transformed into FA-treated E. coli maintained supercoiled integrity with negligible DNA oxidation. Our data strongly suggested that FA functions inside and outside the bacterial membrane; UV-A exposure in the presence of FA then causes increased oxidative modification and subsequent disruption of the bacterial membrane, without causing detectable genotoxicity.
Collapse
Affiliation(s)
- Akihiro Shirai
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan.
| | - Yu-Ko Yasutomo
- Department of Bioscience and Bioindustry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan
| |
Collapse
|
16
|
Heterologous expression of two Aspergillus niger feruloyl esterases in Trichoderma reesei for the production of ferulic acid from wheat bran. Bioprocess Biosyst Eng 2018; 41:593-601. [DOI: 10.1007/s00449-018-1894-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 01/07/2018] [Indexed: 01/20/2023]
|