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Elhessy HM, Berika M, Salem YG, El-Desoky MM, Eldesoqui M, Mostafa N, Habotta OA, Lashine NH. Therapeutic effects of intermittent fasting on high-fat, high-fructose diet; involvement of jejunal aquaporin 1, 3, and 7. Heliyon 2024; 10:e28436. [PMID: 38560252 PMCID: PMC10979098 DOI: 10.1016/j.heliyon.2024.e28436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 04/04/2024] Open
Abstract
Background Aquaporins (AQPs) are transmembrane channel proteins. Aquaporin 1 (AQP1), Aquaporin 3 (AQP3), and Aquaporin 7 (AQP7) are expressed in the jejunum. The purpose of this study was to ascertain how a high-fat high-fructose diet (HFFD) and intermittent fasting (IF) affect AQP1, AQP3, and AQP7 expression in the rat jejunum. Methods Sixteen adult male rats were divided into control rats (n = 4) fed on a basal diet and water ad libitum for 12 weeks; IF control rats (n = 4) followed the IF protocol, HFFD-fed rats (n = 8) fed HFFD for eight weeks, and rats were randomized into two groups: HFFD only or HFFD and IF protocol from the beginning of the 9th week until the end of the experiment. The lipid profile values were assessed after 12 weeks. Jejunal oxidative markers (malondialdehyde and reduced glutathione) and AQP1, AQP3, and AQP7 mRNA expression were measured. Jejunal sections were used for morphometric analysis of villus length and crypt depth. Immunohistochemical evaluation of AQP1, AQP3, and AQP7 expression was also performed. Results IF ameliorates HFFD-induced lipid profile, oxidative stress, and jejunal morphometric changes. The results of both mRNA expression using PCR and immunohistochemistry showed a significant increase in AQP1, AQP3, and AQP7 expression in HFFD, whereas IF caused a decline in this expression. Conclusion These findings suggest that IF can reduce inflammation, and oxidative stress and restore jejunal morphology caused by HFFD.
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Affiliation(s)
- Heba M. Elhessy
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
- Department of Anatomy and Embryology, Faculty of Medicine, New Mansoura University, Mansoura, Egypt
| | - Mohamed Berika
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
- Department of Rehabilitation Science, College of Applied Medical Sciences, King Saud University, Saudi Arabia
| | - Yassmin G. Salem
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Manal M. El-Desoky
- Department of Chemistry, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Mamdouh Eldesoqui
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
- Department of Basic Medical Sciences, College of Medicine, AlMaarefa University, Diriyah, 13713, Riyadh, Saudi Arabia
| | - Nora Mostafa
- Department of Chemistry, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Ola A. Habotta
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Nermeen H. Lashine
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, 35516, Egypt
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Wang F, Wang X, Tang T, Duan Y, Mao T, Guo X, Wang Q, You J. De Novo RNA Sequencing and Transcriptome Analysis of Sclerotium rolfsii Gene Expression during Sclerotium Development. Genes (Basel) 2023; 14:2170. [PMID: 38136992 PMCID: PMC10743028 DOI: 10.3390/genes14122170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/25/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Sclerotium rolfsii is a destructive soil-borne fungal pathogen that causes stem rot in cultivated plants. However, little is known about the genetic basis of sclerotium development. In this study, we conducted de novo sequencing of genes from three different stages of S. rolfsii (mycelia, early sclerotium formation, and late sclerotium formation) using Illumina HiSeqTM 4000. We then determined differentially expressed genes (DEGs) across the three stages and annotated gene functions. STEM and weighted gene-co-expression network analysis were used to cluster DEGs with similar expression patterns. Our analysis yielded an average of 25,957,621 clean reads per sample (22,913,500-28,988,848). We identified 8929, 8453, and 3744 DEGs between sclerotium developmental stages 1 versus 2, 1 versus 3, and 2 versus 3, respectively. Additionally, four significantly altered gene expression profiles involved 220 genes related to sclerotium formation, and two modules were positively correlated with early and late sclerotium formation. These results were supported by the outcomes of qPCR and RNA-sequencing conducted on six genes. This is the first study to provide a gene expression map during sclerotial development in S. rolfsii, which can be used to reduce the re-infection ability of this pathogen and provide new insights into the scientific prevention and control of the disease. This study also provides a useful resource for further research on the genomics of S. rolfsii.
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Affiliation(s)
- Fanfan Wang
- Key Laboratory of Biology and Cultivation of Chinese Herbal Medicines, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
- Hubei Engineering Research Center of Under-Forest Economy, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Xiaoyue Wang
- Key Laboratory of Biology and Cultivation of Chinese Herbal Medicines, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
| | - Tao Tang
- Key Laboratory of Biology and Cultivation of Chinese Herbal Medicines, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
| | - Yuanyuan Duan
- Hubei Engineering Research Center of Under-Forest Economy, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
- Hubei Engineering Research Center of Good Agricultural Practices (GAP) Production for Chinese Herbal Medicines, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
| | - Ting Mao
- Key Laboratory of Biology and Cultivation of Chinese Herbal Medicines, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
| | - Xiaoliang Guo
- Key Laboratory of Biology and Cultivation of Chinese Herbal Medicines, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
| | - Qingfang Wang
- Key Laboratory of Biology and Cultivation of Chinese Herbal Medicines, Ministry of Agriculture and Rural Affairs, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
- Hubei Engineering Research Center of Under-Forest Economy, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
| | - Jingmao You
- Hubei Engineering Research Center of Good Agricultural Practices (GAP) Production for Chinese Herbal Medicines, Institute of Chinese Herbal Medicines, Hubei Academy of Agricultural Sciences, Enshi 445000, China
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Genome Resequencing and Transcriptome Analysis Reveal the Genetic Diversity of Wolfiporia cocos Germplasm and Genes Related to High Yield. Curr Microbiol 2022; 79:312. [DOI: 10.1007/s00284-022-03011-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 08/26/2022] [Indexed: 11/03/2022]
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4
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Kong W, Yang S, Agboyibor C, Chen D, Zhang A, Niu S. Light irradiation can regulate the growth characteristics and metabolites compositions of Rhodotorula mucilaginosa. Journal of Food Science and Technology 2019; 56:5509-5517. [PMID: 31749499 DOI: 10.1007/s13197-019-04023-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/22/2019] [Accepted: 08/12/2019] [Indexed: 11/29/2022]
Abstract
Light is an important factor that can induce the growth of varieties of organisms including fungi and their secondary metabolites. The evolutions of biomass, carotenoids, lipid production, compositions and contents of fatty acid and amino acid in Rhodotorula mucilaginosa were investigated under different light irradiation conditions. The results indicated that irradiation with 1700 lx could promote the growth and glucose assimilation of R. mucilaginosa, compared to the dark control, while the trial with 3500 lx had certain inhibiting effects. The carotenoids concentrations and percentages of unsaturated fatty acid (USFA, C16:1 and C18:1) increased with the improvement of irradiation intensity. Conversely, the proportions of saturated fatty acids (C16:0, C18:0 and C20:0) were decreased. The relative contents of amino acid and total protein were reduced under illumination compared to dark control. Conclusively, irradiation could change the cell growth and metabolites of the pigmented fungus, which implied that there may be a photoinduced mode exists in R. mucilaginosa similar to that of Neurospora crassa, and it also could be applied to regulate the biosynthesis and production of valuable components such as carotenoids and USFA.
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Affiliation(s)
- Weibao Kong
- 1College of Life Sciences, Northwest Normal University, Lanzhou, 730070 China.,Bioactive Products Engineering Research Center for Gansu Distinctive Plants, Lanzhou, 730070 China
| | - Shuling Yang
- 1College of Life Sciences, Northwest Normal University, Lanzhou, 730070 China
| | - Clement Agboyibor
- 1College of Life Sciences, Northwest Normal University, Lanzhou, 730070 China
| | - Dong Chen
- 1College of Life Sciences, Northwest Normal University, Lanzhou, 730070 China
| | - Aimei Zhang
- 1College of Life Sciences, Northwest Normal University, Lanzhou, 730070 China
| | - Shiquan Niu
- 1College of Life Sciences, Northwest Normal University, Lanzhou, 730070 China
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Mussagy CU, Winterburn J, Santos-Ebinuma VC, Pereira JFB. Production and extraction of carotenoids produced by microorganisms. Appl Microbiol Biotechnol 2018; 103:1095-1114. [PMID: 30560452 DOI: 10.1007/s00253-018-9557-5] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/30/2018] [Accepted: 12/03/2018] [Indexed: 02/07/2023]
Abstract
Carotenoids are a group of isoprenoid pigments naturally synthesized by plants and microorganisms, which are applied industrially in food, cosmetic, and pharmaceutical product formulations. In addition to their use as coloring agents, carotenoids have been proposed as health additives, being able to prevent cancer, macular degradation, and cataracts. Moreover, carotenoids may also protect cells against oxidative damage, acting as an antioxidant agent. Considering the interest in greener and sustainable industrial processing, the search for natural carotenoids has increased over the last few decades. In particular, it has been suggested that the use of bioprocessing technologies can improve carotenoid production yields or, as a minimum, increase the efficiency of currently used production processes. Thus, this review provides a short but comprehensive overview of the recent biotechnological developments in carotenoid production using microorganisms. The hot topics in the field are properly addressed, from carotenoid biosynthesis to the current technologies involved in their extraction, and even highlighting the recent advances in the marketing and application of "microbial" carotenoids. It is expected that this review will improve the knowledge and understanding of the most appropriate and economic strategies for a biotechnological production of carotenoids.
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Affiliation(s)
- Cassamo Ussemane Mussagy
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, SP, 14800-903, Brazil
| | - James Winterburn
- School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, UK
| | - Valéria Carvalho Santos-Ebinuma
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, SP, 14800-903, Brazil.
| | - Jorge Fernando Brandão Pereira
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Campos Ville, Araraquara, SP, 14800-903, Brazil
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Georgiou CD, Zervoudakis G, Petropoulou KP. Ascorbic acid might play a role in the sclerotial differentiation ofSclerotium rolfsii. Mycologia 2017. [DOI: 10.1080/15572536.2004.11833115] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | - Katerine P. Petropoulou
- Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26100—Patra, Greece
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Zhong J, Chen D, Zhu HJ, Gao BD, Zhou Q. Hypovirulence of Sclerotium rolfsii Caused by Associated RNA Mycovirus. Front Microbiol 2016; 7:1798. [PMID: 27891121 PMCID: PMC5103162 DOI: 10.3389/fmicb.2016.01798] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 10/26/2016] [Indexed: 11/21/2022] Open
Abstract
Mycoviruses associated with hypovirulence are potential biological control agents and could be useful to study the pathogenesis of fungal host pathogens. Sclerotium rolfsii, a pathogenic fungus, causes southern blight in a wide variety of crops. In this study, we isolated a series of dsRNAs from a debilitated S. rolfsii strain, BLH-1, which had pronounced phenotypic aberrations including reduced pathogenicity, mycelial growth and deficient sclerotia production. Virus-curing and horizontal transmission experiments that eliminated or transmitted, respectively, all dsRNA elements showed that the dsRNAs were involved in the hypovirulent traits of BLH-1. Ultrastructure examination also showed hyphae fracture and cytoplasm or organelle degeneration in BLH-1 hyphal cells compared to the virus-free strain. Three assembled cDNA contigs generated from the cDNA library cloned from the purified dsRNA indicated that strain BLH-1 was infected by at least three novel mycoviruses. One has similarity to the hypovirulence-associated Sclerotinia sclerotiorum hypovirus 2 (SsHV2) in the family Hypoviridae, and the other two are related to two different unclassified dsRNA mycovirus families. To our knowledge, this is the first report of S. rolfsii hypovirulence that was correlated with its associated dsRNA.
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Affiliation(s)
- Jie Zhong
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University Changsha, China
| | - Dan Chen
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University Changsha, China
| | - Hong J Zhu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University Changsha, China
| | - Bi D Gao
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University Changsha, China
| | - Qian Zhou
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University Changsha, China
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De novo assembly and transcriptome analysis of sclerotial development in Wolfiporia cocos. Gene 2016; 588:149-55. [PMID: 27185634 DOI: 10.1016/j.gene.2016.05.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 05/06/2016] [Accepted: 05/12/2016] [Indexed: 01/19/2023]
Abstract
Wolfiporia cocos Ryvarden et Gilbertson, a well-known medicinal fungus in the Basidiomycetes, is widely distributed in East Asia. Its dried sclerotium, which is known as Fuling in China, has been used as a traditional crude drug in Chinese traditional medicine for thousand years. However, little is known about how the sclerotium is developed at the genetic level. In this study, the de novo sequencing of sclerotia of W. cocos (S1_initial stage; S2_developmental stage and S3_mature stage) was carried out by illumina HiSeq 2000 technology. 27,438 unigenes were assembled from ~30Gbp raw data, and 12,093 unigenes were significantly annotated. The analysis of expression profiles during development returned 304 differentially expressed genes (DEGs), which were clustered into four different groups according to their expression trends. Especially for the maturation stage (S3), the sclerotium exhibited a markedly different expression profile from other stages. We further showed that peroxisome, unsaturation of fatty acids and degradation pathway were respectively prevalent in S1, S2 and S3 stages as evidenced by enrichment analysis. To our knowledge, this study represents the first report of sclerotial development transcriptomics in W. cocos. The obtained results provide novel insights into the developmental biology of the sclerotia, which is helpful for future studies about cultivation and breeding of W. cocos.
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Hirpara DG, Gajera HP, Bhimani RD, Golakiya BA. The SRAP based molecular diversity related to antifungal and antioxidant bioactive constituents for biocontrol potentials of Trichoderma against Sclerotium rolfsii Scc. Curr Genet 2016; 62:619-41. [DOI: 10.1007/s00294-016-0567-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 12/30/2015] [Accepted: 01/10/2016] [Indexed: 10/22/2022]
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Maag D, Erb M, Köllner TG, Gershenzon J. Defensive weapons and defense signals in plants: Some metabolites serve both roles. Bioessays 2014; 37:167-74. [DOI: 10.1002/bies.201400124] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Daniel Maag
- Laboratory of Fundamental and Applied Research in Chemical Ecology; University of Neuchâtel; Neuchâtel Switzerland
- Laboratory of Phytochemistry and Bioactive Natural Products; University of Geneva; Geneva Switzerland
| | - Matthias Erb
- Institute of Plant Sciences; University of Bern; Bern Switzerland
| | - Tobias G. Köllner
- Department of Biochemistry; Max Planck Institute for Chemical Ecology; Jena Germany
| | - Jonathan Gershenzon
- Department of Biochemistry; Max Planck Institute for Chemical Ecology; Jena Germany
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Zhao W, Han J, Long D. Effect of copper−induced oxidative stress on sclerotial differentiation, endogenous antioxidant contents, and antioxidative enzyme activities of Penicillium thomii PT95. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0989-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Avalos J, Carmen Limón M. Biological roles of fungal carotenoids. Curr Genet 2014; 61:309-24. [PMID: 25284291 DOI: 10.1007/s00294-014-0454-x] [Citation(s) in RCA: 158] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/12/2014] [Accepted: 09/12/2014] [Indexed: 01/28/2023]
Abstract
Carotenoids are terpenoid pigments widespread in nature, produced by bacteria, fungi, algae and plants. They are also found in animals, which usually obtain them through the diet. Carotenoids in plants provide striking yellow, orange or red colors to fruits and flowers, and play important metabolic and physiological functions, especially relevant in photosynthesis. Their functions are less clear in non-photosynthetic microorganisms. Different fungi produce diverse carotenoids, but the mutants unable to produce them do not exhibit phenotypic alterations in the laboratory, apart of lack of pigmentation. This review summarizes the current knowledge on the functional basis for carotenoid production in fungi. Different lines of evidence support a protective role of carotenoids against oxidative stress and exposure to visible light or UV irradiation. In addition, the carotenoids are intermediary products in the biosynthesis of physiologically active apocarotenoids or derived compounds. This is the case of retinal, obtained from the symmetrical oxidative cleavage of β-carotene. Retinal is the light-absorbing prosthetic group of the rhodopsins, membrane-bound photoreceptors present also in many fungal species. In Mucorales, β-carotene is an intermediary in the synthesis of trisporoids, apocarotenoid derivatives that include the sexual hormones the trisporic acids, and they are also presumably used in the synthesis of sporopollenin polymers. In conclusion, fungi have adapted their ability to produce carotenoids for different non-essential functions, related with stress tolerance or with the synthesis of physiologically active by-products.
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Affiliation(s)
- Javier Avalos
- Departamento de Genética, Universidad de Sevilla, Apartado 1095, 41080, Seville, Spain,
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Aspartame induces alteration in electrolytes homeostasis of immune organs in wistar albino rats. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.bionut.2013.12.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Zhao WJ, An CH, Long DD, Zhang ZQ, Han JR. Effect of copper-induced oxidative stress on sclerotial differentiation and antioxidants contents ofPenicillium thomiiQ1. J Basic Microbiol 2013; 54:1395-402. [DOI: 10.1002/jobm.201300490] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 07/21/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Wen-Jing Zhao
- School of Life Science; Shanxi University; Taiyuan P. R. China
- Taiyuan Normal University; Taiyuan P. R. China
| | - Cui-Hong An
- Center for Disease Control and Prevention of Shaanxi Province; Xi'an P. R. China
| | - Dan-Dan Long
- School of Life Science; Shanxi University; Taiyuan P. R. China
| | - Zhe-Qing Zhang
- School of Life Science; Shanxi University; Taiyuan P. R. China
| | - Jian-Rong Han
- School of Life Science; Shanxi University; Taiyuan P. R. China
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Zhao WJ, An CH, Han JR. Wet-plate culture studies of Penicillium sp. PT95 and Q1 for mass production of sclerotia. J Basic Microbiol 2013; 54:327-32. [PMID: 23553829 DOI: 10.1002/jobm.201200469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/13/2012] [Indexed: 11/09/2022]
Abstract
Penicillium sp. PT95 and Q1 strains were able to form abundant orange, sand-shaped sclerotia in which carotenoids were accumulated. To determine the potential availability of the wet-plate method for mass production of sclerotia, nine kinds of liquid media were used culture the PT95 and Q1 strains. The results of the wet-plate culture showed that on 25% glycerol nitrate broth medium, the growth of both strains was relatively slow, and no sclerotia were found. Q1 strain cultured on Czapek's yeast extract broth medium could not form sclerotia. On other media, both strains could form sclerotia. For PT95 strain, the highest sclerotial biomass (380 mg plate(-1) ) and carotenoids yield (20.88 µg plate(-1) ) could be obtained on Czapek's yeast extract broth and Georgiou's liquid medium, respectively. For Q1 strain, malt extract broth medium gave the highest sclerotial biomass (340 mg plate(-1) ) and omitting iron Joham's liquid medium gave the highest carotenoids yield (18.29 µg plate(-1) ). The results from this study suggest the potential usage of wet-plate method in the mass production of sclerotia of the PT95 and Q1 strains.
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Affiliation(s)
- Wen-Jing Zhao
- School of Life Science, Shanxi University, Taiyuan, China; Taiyuan Normal University, Taiyuan, China
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Xing YM, Zhang LC, Liang HQ, Lv J, Song C, Guo SX, Wang CL, Lee TS, Lee MW. Sclerotial formation of Polyporus umbellatus by low temperature treatment under artificial conditions. PLoS One 2013; 8:e56190. [PMID: 23437090 PMCID: PMC3577777 DOI: 10.1371/journal.pone.0056190] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 01/07/2013] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Polyporus umbellatus sclerotia have been used as a diuretic agent in China for over two thousand years. A shortage of the natural P. umbellatus has prompted researchers to induce sclerotial formation in the laboratory. METHODOLOGY/PRINCIPAL FINDING P. umbellatus cultivation in a sawdust-based substrate was investigated to evaluate the effect of low temperature conditions on sclerotial formation. A phenol-sulfuric acid method was employed to determine the polysaccharide content of wild P. umbellatus sclerotia and mycelia and sclerotia grown in low-temperature treatments. In addition, reactive oxygen species (ROS) content, expressed as the fluorescence intensity of mycelia during sclerotial differentiation was determined. Analysis of ROS generation and sclerotial formation in mycelia after treatment with the antioxidants such as diphenyleneiodonium chloride (DPI), apocynin (Apo), or vitamin C were studied. Furthermore, macroscopic and microscopic characteristics of sclerotial differentiation were observed. Sclerotia were not induced by continuous cultivation at 25°C. The polysaccharide content of the artificial sclerotia is 78% of that of wild sclerotia. In the low-temperature treatment group, the fluorescent intensity of ROS was higher than that of the room temperature (25°C) group which did not induce sclerotial formation all through the cultivation. The antioxidants DPI and Apo reduced ROS levels and did not induce sclerotial formation. Although the concentration-dependent effects of vitamin C (5-15 mg mL(-1)) also reduced ROS generation and inhibited sclerotial formation, using a low concentration of vitamin C (1 mg mL(-1)) successfully induced sclerotial differentiation and increased ROS production. CONCLUSIONS/SIGNIFICANCE Exposure to low temperatures induced P. umbellatus sclerotial morphogenesis during cultivation. Low temperature treatment enhanced ROS in mycelia, which may be important in triggering sclerotial differentiation in P. umbellatus. Moreover, the application of antioxidants impaired ROS generation and inhibited sclerotial formation. Our findings may help to provide new insights into the biological mechanisms underlying sclerotial morphogenesis in P. umbellatus.
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Affiliation(s)
- Yong-Mei Xing
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Li-Chun Zhang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Han-Qiao Liang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Jing Lv
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Chao Song
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Shun-Xing Guo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Chun-Lan Wang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People’s Republic of China
| | - Tae-Soo Lee
- Department of Life Science, University of Incheon, Incheon, Korea
| | - Min-Woong Lee
- Department of Life Science, Dongguk University, Seoul, Korea
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Neurospora crassa Light Signal Transduction Is Affected by ROS. JOURNAL OF SIGNAL TRANSDUCTION 2011; 2012:791963. [PMID: 22046507 PMCID: PMC3199206 DOI: 10.1155/2012/791963] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 06/23/2011] [Indexed: 11/17/2022]
Abstract
In the ascomycete fungus Neurospora crassa blue-violet light controls the expression of genes responsible for differentiation of reproductive structures, synthesis of secondary metabolites, and the circadian oscillator activity. A major photoreceptor in Neurospora cells is WCC, a heterodimeric complex formed by the PAS-domain-containing polypeptides WC-1 and WC-2, the products of genes white collar-1 and white collar-2. The photosignal transduction is started by photochemical activity of an excited FAD molecule noncovalently bound by the LOV domain (a specialized variant of the PAS domain). The presence of zinc fingers (the GATA-recognizing sequences) in both WC-1 and WC-2 proteins suggests that they might function as transcription factors. However, a critical analysis of the phototransduction mechanism considers the existence of residual light responses upon absence of WCC or its homologs in fungi. The data presented
point at endogenous ROS generated by a photon stimulus as an alternative input to pass on light signals to downstream targets.
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Aydin S, Aytac E, Uzun H, Altug T, Mansur B, Saygili S, Buyukpinarbasili N, Sariyar M. Effects of Ganoderma lucidum on obstructive jaundice-induced oxidative stress. Asian J Surg 2011; 33:173-80. [PMID: 21377103 DOI: 10.1016/s1015-9584(11)60003-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2010] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Obstructive jaundice develops after occlusion of the common bile duct. Direct hyperbilirubinaemia, which occurs secondary to the condition, causes various life-threatening pathologies. Cytoprotective effects of Ganoderma lucidum (GL) have previously been shown. In this study, the effects of GL on oxidative stress and oxidant DNA damage in experimental obstructive jaundice were evaluated. METHODS Sixty Wistar albino adult female rats were randomly divided into six weight-matched equal groups: sham group, bile duct ligated group (BDL); after sham operation 250 mg/kg/d of GL administered group, after sham operation 500 mg/kg/d of GL administered group, after bile duct ligation 250 mg/kg/d of GL administered (GL1BDL) group, and after bile duct ligation 500 mg/kg/d of GL administered (GL2BDL) group. GL polysaccharide was orally administered to the rats via gavage tube once a day for 14 days after bile duct ligation. RESULTS The plasma malondialdehyde levels of the GL1BDL and GL2BDL groups were significantly lower than those of the BDL group (p < 0.01). The plasma 8-hydroxy-2'-deoxyguanosine levels of the GL1BDL and GL2BDL groups were significantly lower than those of the BDL group (p < 0.001). The liver tissue Cu-Zn superoxide dismutase level of the GL2BDL group was significantly higher than that of the BDL group (p < 0.05). CONCLUSION GL protected against DNA and liver tissue damage by reducing oxidative stress in obstructive jaundice.
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Affiliation(s)
- Seval Aydin
- Department of Biochemistry, Istanbul University Cerrahpasa Medical Faculty, Turkey
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Assimakopoulos SF, Tsamandas AC, Georgiou CD, Vagianos CE, Scopa CD. Bombesin and neurotensin exert antiproliferative effects on oval cells and augment the regenerative response of the cholestatic rat liver. Peptides 2010; 31:2294-303. [PMID: 20833216 DOI: 10.1016/j.peptides.2010.09.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 09/02/2010] [Accepted: 09/02/2010] [Indexed: 12/30/2022]
Abstract
The regenerative capacity of the cholestatic liver is significantly attenuated. Oval cells are hepatic stem cells involved in liver's regeneration following diverse types of injury. The present study investigated the effect of the neuropeptides bombesin (BBS) and neurotensin (NT) on oval cell proliferation as well as on hepatocyte and cholangiocyte proliferation and apoptosis in the cholestatic rat liver. Seventy male Wistar rats were randomly divided into five groups: controls, sham operated, bile duct ligated (BDL), BDL+BBS (30 μg/kg/d), BDL+NT (300 μg/kg/d). Ten days later, alpha-fetoprotein (AFP) mRNA (in situ hybridization), cytokeratin-19 and Ki67 antigen expression (immunohistochemistry) and apoptosis (TUNEL) were evaluated on liver tissue samples. Cells with morphologic features of oval cells that were cytokeratin-19(+) and AFP mRNA(+) were scored in morphometric analysis and their proliferation was recorded. In addition, the proliferation and apoptotic rates of hepatocytes and cholangiocytes were determined. Alanine aminotransferase (ALT) levels and hepatic oxidative stress (lipid peroxidation and glutathione redox state) were also estimated. The neuropeptides BBS and NT significantly reduced ALT levels and hepatic oxidative stress. Both agents exerted similar and cell type-specific effects on oval cells, hepatocytes and cholangiocytes: (a) oval cell proliferation and accumulation in the cholestatic liver was attenuated, (b) hepatocyte proliferation was increased along with a decreased rate of their apoptosis and (c) cholangiocyte proliferation was attenuated and their apoptosis was increased. These observations might be of potential value in patients with extrahepatic cholestasis.
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Chen SJ, Wang Q, Han JR. Influence of oxidative stress and grains on sclerotial biomass and carotenoid yield of Penicillium sp. PT95. J Basic Microbiol 2010; 50:388-91. [DOI: 10.1002/jobm.200900437] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Patsoukis N, Georgiou DC. Thiol redox state and related enzymes in sclerotium-forming filamentous phytopathogenic fungi. ACTA ACUST UNITED AC 2007; 112:602-10. [PMID: 18400483 DOI: 10.1016/j.mycres.2007.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2007] [Revised: 08/10/2007] [Accepted: 10/24/2007] [Indexed: 10/22/2022]
Abstract
Thiol redox state (TRS) reduced and oxidized components form profiles characteristic of each of the four main types of differentiation in the sclerotiogenic phytopathogenic fungi: loose, terminal, lateral-chained, and lateral-simple, represented by Rhizoctonia solani, Sclerotinia sclerotiorum, Sclerotium rolfsii, and Sclerotinia minor, respectively. A common feature of these fungi is that as their undifferentiated mycelium enters the differentiated state, it is accompanied by a decrease in the low oxidative stress-associated total reduced thiols and/or by an increase of the high oxidative stress-associated total oxidized thiols either in the sclerotial mycelial substrate or in its corresponding sclerotium, indicating a relationship between TRS-related oxidative stress and sclerotial differentiation. Moreover, the four studied sclerotium types exhibit high activities of TRS-related antioxidant enzymes, indicating the existence of antioxidant protection of the hyphae of the sclerotium medulla until conditions become appropriate for sclerotium germination.
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Gessler NN, Aver’yanov AA, Belozerskaya TA. Reactive oxygen species in regulation of fungal development. BIOCHEMISTRY (MOSCOW) 2007; 72:1091-109. [DOI: 10.1134/s0006297907100070] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Patsoukis N, Georgiou CD. Thiol redox state and oxidative stress affect sclerotial differentiation of the phytopathogenic fungi Sclerotium rolfsii and Sclerotinia sclerotiorum. J Appl Microbiol 2007; 104:42-50. [PMID: 17850300 DOI: 10.1111/j.1365-2672.2007.03527.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AIMS To investigate the involvement of oxidative stress and thiol redox state (TRS) in sclerotial differentiation of Sclerotium rolfsii and Sclerotinia sclerotiorum. METHODS AND RESULTS Oxidative stress in these fungi was assessed by lipid peroxidation, which was higher in comparison with their nonsclerotiogenic counterpart strains. TRS [measured as glutathione (GSH) and cysteine] was associated with oxidative stress and differentiation using the TRS modulator and antioxidant Nu-acetylcysteine (AcCSH) and the GSH biosynthesis inducer and inhibitor l-2-oxo-thiazolidine-4-carboxylate and L-buthionine-S,R-sulphoximine (BSO) respectively. Differentiation and oxidative stress was decreased by AcCSH in both fungi. The decrease of differentiation by BSO was not associated with oxidative stress in these fungi. CONCLUSIONS Differentiation and oxidative stress in both fungi depends on the availability of antioxidant noncytotoxic -SH groups and is not depended on any direct antioxidant role of GSH and its precursor cysteine. SIGNIFICANCE AND IMPACT OF THE STUDY This study helps to understand the mechanism(s) of sclerotial differentiation in these agriculturally important phytopathogenic fungi and proposes that AcCSH can be used as potent fungicide by (i) acting as growth inhibiting cytotoxic oxidant and (ii) sustaining these fungi in their undifferentiated hyphal stage where they are vulnerable to degradation by soil micro-organisms.
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Affiliation(s)
- N Patsoukis
- Department of Biology, Section of Genetics, Cell Biology and Development, University of Patras, Patras, Greece
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Patsoukis N, Georgiou CD. Effect of thiol redox state modulators on oxidative stress and sclerotial differentiation of the phytopathogenic fungus Rhizoctonia solani. Arch Microbiol 2007; 188:225-33. [PMID: 17429612 DOI: 10.1007/s00203-007-0237-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Revised: 02/07/2007] [Accepted: 03/24/2007] [Indexed: 11/27/2022]
Abstract
This study showed that sclerotial differentiation in the filamentous phytopathogenic fungus Rhizoctonia solani is directly related to oxidative stress and thiol redox state (TRS). Sclerotial differentiation is modulated by the availability of non-cytotoxic -SH groups as was shown by the inhibition of sclerorial differentiation by the TRS modulator N-acetyl cysteine (AcCSH), and not necessarily with those of the TRS reduced components glutathione (GSH) and its precursor cysteine (CSH) as indicated by the GSH-biosynthesis inducer and inhibitor L-2-oxo-thiazolidine-4-carboxylate and L-buthionine-S,R-sulfoximine, respectively. Moreover, inhibition of sclerotial differentiation was accompanied by decrease of the high oxidative stress indicators, lipid peroxidation and DNA damage in the mycelial substrate where sclerotia initials are formed, which suggests that this phenomenon is related to oxidative stress as it is predicted by our theory on sclerotial differentiation.
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Affiliation(s)
- Nikolaos Patsoukis
- Department of Biology, Section of Genetics, Cell Biology and Development, University of Patras, 26100 Patras, Greece
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27
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Li XL, Cui XH, Han JR. Sclerotial biomass and carotenoid yield of Penicillium sp. PT95 under oxidative growth conditions and in the presence of antioxidant ascorbic acid. J Appl Microbiol 2007; 101:725-31. [PMID: 16907823 DOI: 10.1111/j.1365-2672.2006.02982.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To determine the effect of oxidative stress and exogenous ascorbic acid on sclerotial biomass and carotenoid yield of Penicillium sp. PT95. METHODS In this experiment, high oxidative stress was applied by the inclusion of FeSO(4) in the growth medium and exposure to light. Low oxidative stress was applied by omitting iron from the growth medium and by incubation in the dark. Supplementation of exogenous ascorbic acid (as antioxidant) to the basal medium caused a concentration-dependent delay of sclerotial differentiation (up to 48 h), decrease of sclerotial biomass (up to 40%) and reduction of carotenoid yield (up to 91%). On the contrary, the exogenous ascorbic acid also caused a concentration-dependent decrease of lipid peroxidation in colonies of this fungus. CONCLUSIONS Under high oxidative stress growth condition, the sclerotial biomass and carotenoid yield of PT95 strain in each plate culture reached 305 mg and 32.94 microg, which were 1.23 and 3.71 times higher, respectively, than those at low oxidative stress growth condition. These data prompted us to consider that in order to attain higher sclerotial biomass and pigment yield, the strain PT95 should be grown under high oxidative stress and in the absence of antioxidants. SIGNIFICANCE AND IMPACT OF THE STUDY These results suggest that strain PT95 may be used for solid-state fermentation of carotenoid production under high oxidative stress growth conditions.
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Affiliation(s)
- X L Li
- School of Life Science and Technology, Shanxi University, Taiyuan, PR China
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28
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Patsoukis N, Georgiou CD. Effect of glutathione biosynthesis-related modulators on the thiol redox state enzymes and on sclerotial differentiation of filamentous phytopathogenic fungi. Mycopathologia 2007; 163:335-47. [PMID: 17387631 DOI: 10.1007/s11046-007-9008-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2006] [Accepted: 03/07/2007] [Indexed: 10/23/2022]
Abstract
In this study, sclerotial differentiation in filamentous phytopathogenic fungi, representing the four main types of sclerotia, was studied in relation to thiol redox state (TRS)-related enzymes and their substrates/products. TRS was altered by the general TRS modulator Nu-acetylcysteine (AcCSH) and by the glutathione (GSH) biosynthesis modulators L-oxo-thiazolidine-4-carboxylate (OTC), and L-buthionine-S,R-sulfoximine (BSO). This study showed that the four studied types of sclerotial differentiation are directly related with the antioxidant -SH groups of GSH and/or CSH, since the decrease of sclerotial differentiation concurred with an increase of these thiols by the GSH biosynthesis modulators AcCSH, OTC, and BSO. Supportive to that conclusion is the fact that, in general, the activities of the TRS-related enzymes GR/GPDH and Ttase decrease in the end of the undifferentiated stage due to the substitution of their antioxidant function by the antioxidant potential of the -SH group providers AcCSH and OTC. Moreover, it was found that BSO expectedly suppressed GSH biosynthesis in the tested fungi, and unexpectedly decreased their sclerotial differentiation by a dose-dependent manner typical for antioxidants. The possible antioxidant role of BSO was supported by the decrease it caused in the antioxidant enzymes GR/GPDH and Ttase. The results of this study are in accordance with our hypothesis that sclerotial differentiation in phytopathogenic fungi is induced by oxidative stress.
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Affiliation(s)
- Nikolaos Patsoukis
- Department of Biology, Section of Genetics, Cell Biology and Development, University of Patras, Patras, 26100, Greece
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29
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Assimakopoulos SF, Alexandris IH, Scopa CD, Mylonas PG, Thomopoulos KC, Georgiou CD, Nikolopoulou VN, Vagianos CE. Effect of bombesin and neurotensin on gut barrier function in partially hepatectomized rats. World J Gastroenterol 2005; 11:6757-64. [PMID: 16425380 PMCID: PMC4725030 DOI: 10.3748/wjg.v11.i43.6757] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the effect of regulatory peptides bombesin (BBS) and neurotensin (NT) on intestinal barrier function in partially hepatectomized rats.
METHODS: Ninety male Wistar rats were randomly divided into five groups: I (n = 10): controls, II (n = 20): sham operated, III (n = 20): partial hepatectomy 70% (PHx), IV (n = 20): PHx+BBS (30 μg/kg/d), V (n = 20): PHx+NT (300 μg/kg/d). Groups IV and V were treated for 8 days before PHx and 48 h post surgery. At the end of the experiment, on day 10, intestinal barrier function was assessed by measuring endotoxin concentrations in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically and villus density, mucosal thickness, mitotic activity and apoptosis in crypts were assessed. In addition, ileal mucosa was analyzed for DNA and protein content and microbiological analysis was performed in cecal contents. To estimate intestinal oxidative stress, lipid peroxidation was determined on tissue homogenates from terminal ileum.
RESULTS: BBS or NT administration significantly reduced portal and systemic endotoxemia observed 48 h after partial hepatectomy. In hepatectomized rats (group III), a trend towards induction of mucosal atrophy was observed, demonstrated by the reduction of villus density, mucosal thickness, protein content and significant reduction of DNA, while these alterations were reversed by regulatory peptides administration. This trophic effect of BBS and NT was accompanied by induction of mitoses above control levels and a significant reduction of apoptosis in intestinal crypts. Intestinal lipid peroxidation was found significantly lower in PHx group and regulatory peptides exerted an antioxidant action, further decreasing this parameter of oxidative stress. The bacterial population of E. coli and aerobic Gram (+) cocci was increased in cecal content of hepatectomized rats, while this parameter was not affected by the administration of BBS or NT.
CONCLUSION: Gut regulatory peptides BBS and NT improve intestinal barrier function and reduce endotoxemia in experimental partial hepatectomy. This effect is, at least in part, mediated by their trophic, antiapoptotic, mitogenic, and antioxidant effect on the intestinal epithelium. This observation might be of potential value in patients undergoing liver resection.
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Affiliation(s)
- Stelios F Assimakopoulos
- Department of Surgery, University of Patras, Medical School, Rion University Hospital, 26500 Patras, Greece
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Han JR, Zhao WJ, Gao YY, Yuan JM. Effect of oxidative stress and exogenous beta-carotene on sclerotial differentiation and carotenoid yield of Penicillium sp. PT95. Lett Appl Microbiol 2005; 40:412-7. [PMID: 15892735 DOI: 10.1111/j.1472-765x.2005.01697.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To determine the effect of oxidative stress and exogenous beta-carotene on sclerotial differentiation and carotenoid yield of Penicillium sp. PT95. METHODS AND RESULTS In this experiment, high oxidative stress was applied by inclusion of FeCl(3) (10 micromol l(-1)) in the growth medium and by light exposure. Low oxidative stress was applied by omitting iron from the growth medium and by incubation in the dark. Supplementation of exogenous beta-carotene (as antioxidant) to the basal medium caused a concentration-dependent delay of sclerotial differentiation (up to 72 h), decrease of sclerotial biomass (up to 43%) and reduction of carotenoid yield (up to 92%). On the contrary, the exogenous beta-carotene also caused a concentration-dependent decrease of lipid peroxidation in colonies of this fungus. CONCLUSIONS Under high oxidative stress growth condition, the sclerotial biomass and carotenoid yield of PT95 strain in each plate culture reached 141 mg and 30.03 microg, which were 1.53 and 3.51 times higher respectively, than that at low oxidative stress growth condition. SIGNIFICANCE AND IMPACT OF THE STUDY These data prompted us to consider that in order to attain higher sclerotial biomass and pigment yield, the strain PT95 should be grown under high oxidative stress and in the absence of antioxidants.
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Affiliation(s)
- J R Han
- School of Life Science and Technology, Shanxi University, Taiyuan, China.
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Assimakopoulos SF, Vagianos CE, Zervoudakis G, Filos KS, Georgiou C, Nikolopoulou V, Scopa CD. Gut regulatory peptides bombesin and neurotensin reduce hepatic oxidative stress and histological alterations in bile duct ligated rats. ACTA ACUST UNITED AC 2005; 120:185-93. [PMID: 15177937 DOI: 10.1016/j.regpep.2004.03.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2003] [Revised: 02/28/2004] [Accepted: 03/15/2004] [Indexed: 12/27/2022]
Abstract
Gut regulatory peptides bombesin (BBS) and neurotensin (NT) exert a wide spectrum of biological actions on gastrointestinal tissues and we have previously shown that they improve intestinal barrier function and oxidative stress in experimentally jaundiced rats. In the present study, we explored their potential action on liver histology and oxidative status in bile duct ligated rats. Seventy male Wistar rats were randomly divided into five groups: controls, sham operated, bile duct ligated (BDL), BDL + BBS (10 microg/kg, s.c. x3), BDL + NT (300 microg/kg, i.p.). At the end of the experiment, on day 10, serum total bilirubin and alanine aminotransferase (ALT) levels were determined and endotoxin was measured in portal and aortic blood. Liver tissue samples were examined histologically for evaluation of the ratio of portal tracts presenting changes of obstructive cholangiopathy and neutrophils' number in portal tracts. In addition, hepatic oxidative status was estimated on liver homogenates by measurements of lipid peroxidation (malondialdehyde), protein oxidation (protein carbonyl groups) and thiol redox state [reduced glutathione (GSH), oxidized glutathione (GSSG), total non-protein mixed disulfides (NPSSR) and protein thiols (PSH)]. Administration of BBS or NT significantly reduced portal and aortic endotoxaemia observed in obstructive jaundice. Both agents significantly ameliorated liver injury, as demonstrated by improvement of obstructive cholangiopathy and reduction of ALT. This effect was accompanied by prevention of lipid peroxidation, protein oxidation and decrease of the oxidized forms GSSG and NPSSR. Moreover, neutrophil accumulation in portal tracts was significantly decreased. In conclusion, this study shows that gut regulatory peptides BBS and NT reduce cholestatic liver injury, exerting protective effects on portal tract architecture, neutrophil infiltration and hepatic oxidative stress in bile duct ligated rats.
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Affiliation(s)
- Stelios F Assimakopoulos
- Department of Internal Medicine, Division of Gastroenterology, School of Medicine, University of Patras, Greece
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Assimakopoulos SF, Scopa CD, Zervoudakis G, Mylonas PG, Georgiou C, Nikolopoulou V, Vagianos CE. Bombesin and neurotensin reduce endotoxemia, intestinal oxidative stress, and apoptosis in experimental obstructive jaundice. Ann Surg 2005; 241:159-67. [PMID: 15622004 PMCID: PMC1356859 DOI: 10.1097/01.sla.0000149306.35717.8b] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To evaluate the effect of bombesin (BBS) and neurotensin (NT) on intestinal histopathology, intestinal oxidative stress, and endotoxemia in experimental obstructive jaundice. SUMMARY BACKGROUND DATA Obstructive jaundice compromises gut barrier function, resulting in endotoxemia. BBS and NT, exerting various biologic actions on gastrointestinal tissues, preserve gut mucosal integrity in cases of injury or atrophy. METHODS Seventy male Wistar rats were randomly divided into 5 groups: I = controls, II = sham operated, III = bile duct ligation (BDL), IV = BDL + BBS (30 microg/kg/d), V = BDL + NT (300 microg/kg/d). By the end of the experiment, on day 10, endotoxin was measured in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically, and villus density, mucosal thickness, mitotic activity and apoptosis in crypts were assessed. In addition, ileal mucosa was analyzed for DNA and protein content. To estimate intestinal oxidant/antioxidant equilibrium, lipid peroxidation, protein oxidation, and thiol redox state (reduced glutathione [GSH], oxidized glutathione [GSSG], total nonprotein mixed disulfides [NPSSR], protein thiols [PSH], and protein disulfides [PSSP]) were determined on tissue homogenates from the terminal ileum. RESULTS BBS or NT administration significantly reduced portal and systemic endotoxemia observed in obstructive jaundice. Both factors reversed obstructive jaundice-induced morphologic features of intestinal atrophy, increasing villus density and mucosal thickness. This effect was accompanied by induction of mitoses and reduction of apoptosis in intestinal crypts. Mucosal DNA and protein content were reduced, although not to significant levels, in BDL animals and restored to control levels after BBS or NT treatment. Moreover, BBS or NT administration protected the intestine in jaundiced rats against oxidative stress, as demonstrated by reduction of intestinal lipid peroxidation, increase of the antioxidant GSH, and decrease of the oxidized forms GSSG and NPSSR, while BBS additionally reduced protein oxidation as well. CONCLUSIONS Administration of BBS or NT in bile duct-ligated rats exerts beneficial effects on intestinal oxidative stress, cell proliferation, apoptosis, and endotoxemia. This observation might be of potential value in patients with extrahepatic cholestasis.
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Alexandris IH, Assimakopoulos SF, Vagianos CE, Patsoukis N, Georgiou C, Nikolopoulou V, Scopa CD. Oxidative state in intestine and liver after partial hepatectomy in rats. Effect of bombesin and neurotensin. Clin Biochem 2004; 37:350-6. [PMID: 15087249 DOI: 10.1016/j.clinbiochem.2004.01.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2003] [Revised: 01/07/2004] [Accepted: 01/08/2004] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Extended liver resection is a situation with major implication of the gut-liver axis. In the present study, we aimed to investigate intestinal and liver oxidative stress after partial hepatectomy and explore the influence of exogenous administration of gut regulatory peptides bombesin (BBS) and neurotensin (NT). DESIGN AND METHODS Ninety male Wistar rats were randomly divided into five groups: control, sham operated, partially hepatectomized (70%), and partially hepatectomized treated with either BBS or NT. Forty-eight hours after surgery, lipid peroxidation, protein oxidation, reduced and oxidized glutathione were measured on intestinal and liver homogenates. Endotoxin levels were determined in portal and aortic blood. RESULTS In hepatectomized rats, all parameters of oxidative stress in remnant liver were decreased. In the intestine, oxidative protein damage was increased, while lipid peroxidation and glutathione oxidation were reduced. BBS and NT reduced protein and glutathione oxidation in both tissues and prevented lipid peroxidation in the intestine. Furthermore, portal and aortic endotoxemia were decreased in peptides-treated rats. CONCLUSIONS After partial hepatectomy, liver regeneration takes place under low oxidative stress, while increased oxidative damage to proteins occurs in the intestine. Gut regulatory peptides BBS and NT exert an antioxidant effect in both organs and prevent endotoxemia.
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Affiliation(s)
- Ilias H Alexandris
- Department of Surgery, School of Medicine, University of Patras, Patras, Greece
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Papapostolou I, Patsoukis N, Georgiou CD. The fluorescence detection of superoxide radical using hydroethidine could be complicated by the presence of heme proteins. Anal Biochem 2004; 332:290-8. [PMID: 15325298 DOI: 10.1016/j.ab.2004.06.022] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2004] [Indexed: 11/23/2022]
Abstract
This study shows that hydroethidine (HE) used for the qualitative detection of superoxide anion can also be oxidized by heme proteins such as the mitochondrial cytochromes, hemoglobin, and myoglobin, forming spectrally nonhomogenous mixtures of HE-derived products of various oxidation states. All oxidation products show excitation/emission peaks (490-495/580-600 nm) near the excitation/emission peaks (475/570 nm) of the HE-superoxide oxidation product, and this may pose serious interference problems to the fluorescent detection of the superoxide radical. This paper discusses possible precautionary steps that should be taken to minimize the interfering problems in the HE-superoxide assay and suggests its use mainly for reactive oxygen species detection.
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Assimakopoulos SF, Scopa CD, Charonis A, Spiliopoulou I, Georgiou C, Nikolopoulou V, Vagianos CE. Experimental obstructive jaundice disrupts intestinal mucosal barrier by altering occludin expression: beneficial effect of bombesin and neurotensin. J Am Coll Surg 2004; 198:748-57. [PMID: 15110809 DOI: 10.1016/j.jamcollsurg.2003.12.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2003] [Revised: 10/15/2003] [Accepted: 12/10/2003] [Indexed: 12/19/2022]
Abstract
BACKGROUND Little is known of the molecular events leading to increased intestinal permeability in obstructive jaundice. This study was undertaken to investigate the influence of experimental obstructive jaundice on the expression of the tight junction-associated protein occludin in the intestinal epithelium. STUDY DESIGN Seventy male Wistar rats were randomly divided into five groups: I, controls; II, sham-operated; III, bile duct ligation (BDL); IV, BDL+Bombesin (BBS) (30 microg/kg/d); and V, BDL+Neurotensin (NT) (300 microg/kg/d). At the end of the experiment, on day 10, endotoxin was measured in portal and aortic blood. Tissue sections of the terminal ileum were examined histologically and immunohistochemically for evaluation of occludin expression in the intestinal epithelium. Lipid peroxidation and protein oxidation were determined on tissue homogenates from terminal ileum and microbiologic analysis was performed in cecal contents. RESULTS Obstructive jaundice resulted in portal and aortic endotoxemia, which was significantly reduced after BBS or NT administration. In the BDL group, there was total loss of occludin expression in numerous enterocytes mainly at the upper third of the villi, while a gradient of positivity existed from crypt to tip. Occludin expression was restored to control state after treatment with BBS or NT. In addition, both peptides reduced intestinal lipid peroxidation, while BBS reduced protein oxidation as well. CONCLUSIONS Experimental obstructive jaundice induces regional loss of occludin expression in the intestinal epithelium, which may be a key factor contributing to the disruption of the mucosal barrier. Gut regulatory peptides BBS and NT prevent this alteration, leading to lower portal and systemic endotoxemia.
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Assimakopoulos SF, Vagianos CE, Patsoukis N, Georgiou C, Nikolopoulou V, Scopa CD. Evidence for intestinal oxidative stress in obstructive jaundice-induced gut barrier dysfunction in rats. ACTA ACUST UNITED AC 2004; 180:177-85. [PMID: 14738476 DOI: 10.1046/j.0001-6772.2003.01229.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM An important factor that promotes bacterial and endotoxin translocation in obstructive jaundice is intestinal injury that causes increased permeability. However, little is known of the submicroscopic biochemical events leading to defects of the intestinal barrier. This study was undertaken to investigate the effect of experimental obstructive jaundice on intestinal lipid peroxidation, protein oxidation and thiol redox state. METHODS Rats were randomly divided into controls, sham operated and bile duct ligated (BDL). After 10 days, intestinal barrier function was assessed by measuring endotoxin in portal and aortic blood. Tissue samples from the terminal ileum were examined histologically and morphometrically, while other samples were homogenized for the determination of lipid peroxidation, protein oxidation and thiol redox state [reduced glutathione (GSH), oxidized glutathione (GSSG), total non-protein mixed disulphides (NPSSR), protein thiols (PSH) and protein disulphides (PSSP)]. RESULTS Obstructive jaundice compromised intestinal barrier function leading to significant portal and systemic endotoxaemia. The intestinal mucosa in jaundiced rats was atrophic with significantly decreased villous density and total mucosal thickness. Determination of biochemical parameters of oxidative stress in the intestine showed increased lipid peroxidation and protein oxidation in BDL-rats. Thiol redox state revealed the presence of intestinal oxidative stress in jaundiced rats, indicated by a decrease in GSH and increased GSSG, NPSSR and PSSP. CONCLUSIONS This study shows that experimental obstructive jaundice induces intestinal oxidative stress, which may be a key factor contributing to intestinal injury and leading to endotoxin translocation.
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Affiliation(s)
- S F Assimakopoulos
- Department of Internal Medicine, Division of Gastroenterology, School of Medicine, University of Patras, Patras, Greece
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Nathues E, Joshi S, Tenberge KB, von den Driesch M, Oeser B, Bäumer N, Mihlan M, Tudzynski P. CPTF1, a CREB-like transcription factor, is involved in the oxidative stress response in the phytopathogen Claviceps purpurea and modulates ROS level in its host Secale cereale. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2004; 17:383-393. [PMID: 15077671 DOI: 10.1094/mpmi.2004.17.4.383] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
CPTF1, a transcription factor with significant homology to ATF/CREB bZIP factors, was identified during an expressed sequence tag (EST) analysis of in planta-expressed genes of the phytopathogen Claviceps purpurea. Using a gene-replacement approach, deletion mutants of cptf1 were created. Expression studies in axenic culture showed that the H2O2-inducible gene cpcat1 (encoding a secreted catalase) had a reduced basal expression level and no longer responded to oxidative stress in the delta cptf1 mutant. Biochemical analyses indicated that CPTF1 is a general regulator of catalase activity. Delta cptf1 mutants showed significantly reduced virulence on rye. Electron microscopical in situ localization revealed significant amounts of H2O2 in delta cptf1-infected rye epidermal tissues, indicating that the plant tissue displayed an oxidative burst-like reaction, an event not detected in wild-type infections. These data indicate that CPTF1 is involved not only in oxidative stress response in the fungus but also in modulation of the plant's defense reactions.
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Affiliation(s)
- Eva Nathues
- Institut für Botanik, Westfälische Wilhelms-Universität, Schlossgarten 3, D-48149 Münster, Germany
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Zervoudakis G, Tairis N, Salahas G, Georgiou CD. Beta-carotene production and sclerotial differentiation in Sclerotinia minor. MYCOLOGICAL RESEARCH 2003; 107:624-31. [PMID: 12884961 DOI: 10.1017/s0953756203007822] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Sclerotinia minor accumulates beta-carotene at levels dependent upon oxidative growth conditions and differentiation. Beta-carotene accumulation is 2.5-fold higher in differentiated mycelia at high than at low oxidative stress, and approx. 3-fold higher in differentiated than in undifferentiated mycelia. It is proposed that beta-carotene may be produced by the fungus to counteract oxidative stress that develops during growth. This is shown by the finding that exogenous beta-carotene at growth non-inhibiting concentrations causes a concentration-dependent reduction of oxidative stress (lipid and protein peroxidation) and sclerotial differentiation in this fungus. The data of this study support our hypothesis that sclerotial differentiation in phytopathogenic fungi may be induced by oxidative stress.
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Affiliation(s)
- George Zervoudakis
- Section of Genetics, Cell Biology and Development, Department of Biology, University of Patras, 26100 Patra, Greece
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