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Shabab Z, Sarada DL. 24-Epibrassinolide mitigates arsenate stress in seedlings of Oryza sativa (IR-20) via the induction of phenylpropanoid pathway. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 215:109023. [PMID: 39146914 DOI: 10.1016/j.plaphy.2024.109023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 07/29/2024] [Accepted: 08/06/2024] [Indexed: 08/17/2024]
Abstract
The introduction of arsenic, a hazardous metalloid, into the soil system due to heavy industrialization has negatively affected agricultural productivity, resulting in limited crop yields. A recent breakthrough in stress-responsive hormones, specifically brassinosteroids, has extensively covered the role of antioxidant enzyme defense systems in heavy metal stress mitigation. Considering the antioxidant properties and metal complex formation abilities of polyphenols, our study focuses on examining their role in arsenate toxicity amelioration by 24-epibrassinolide. We demonstrate enhanced growth parameters of sodium arsenate-stressed seedlings upon application of 24-epibrassinolide, with increased root and shoot polyphenol levels analyzed by high-performance liquid chromatography. Specifically, the concentration of catechin, sinapic acid, 4-hydroxy benzoic acid, protocatechuic acid, 4-coumaric acid, and myricetin were elevated, indicating induction of phenylpropanoid signaling pathway. Further, we also report a decrease in the generation of superoxide anions and hydrogen peroxide validated the antioxidant effects of these metabolites through the nitrobluetetrazolium and diaminobenzidine staining method. In addition, evaluation of transcript level of genes encoding for specific enzymes of the phenylpropanoid pathway in shoot and root showed a significant upregulation in mRNA expression of phenylalanine ammonia-lyase-1, cinnamate-4-hydroxylase, and caffeic acid o-methyltransferase-1 upon exogenous application of 24-epibrassinolide in arsenate stressed Oryza sativa.
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Affiliation(s)
- Ziya Shabab
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India
| | - DronamrajuV L Sarada
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, 603 203, Tamil Nadu, India.
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2
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Jing B, Chen ZN, Si WM, Zhao JJ, Zhao GP, Zhang D. (+)-Catechin Alleviates CCI-Induced Neuropathic Pain in Rats by Modulating the IL34/CSFIR Axis and Attenuating the Schwann Cell-Macrophage Cascade Response in the DRG. Mol Neurobiol 2024; 61:5027-5041. [PMID: 38159197 DOI: 10.1007/s12035-023-03876-w] [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: 09/14/2023] [Accepted: 11/30/2023] [Indexed: 01/03/2024]
Abstract
The aim of this study was to investigate the potential therapeutic applications of (+)-catechin in the treatment of neuropathic pain. In vivo study, 32 SD rats were randomly divided into four groups: sham group, chronic constriction injury (CCI) group, CCI + ibuprofen group and CCI+ (+)-catechin group. They were subjected to behavioural tests, ELISA, immunohistochemistry and Western blotting. The mechanisms involved were investigated using specific inhibitors in cell experiments. Results of in vivo experiments showed that (+)-catechin could reduce the cold sensitivity pain in a rat model of CCI; ELISA and immunohistochemistry results showed that (+)-catechin could decrease the levels of IL-8, IL-6, TNF-α, CCL2 and CCL5 in serum and the expression levels of nNOS, COX2, IL6, TNF-α, IBA-1 and CSF1R in DRG of CCI rats. Finally, western blot confirmed that (+)-catechin could diminish the levels of IL-34/CSF1R/JAK2/STAT3 signalling pathway in DRG of CCI rats. In vitro studies showed that (+)-catechin reduced IL-34 secretion in LPS-induced RSC96 cells. Meanwhile, (+)-catechin administration in LPS-induced Schwann cell-conditioned medium (L-CM) significantly inhibited the proliferation and migration of RAW264.7 cells; in addition, L-CM+(+)-catechin reduced the activation of the CSF1R/JAK2/STAT3 signalling pathway. (+)-Catechin attenuated the Schwann cell-macrophage cascade response in the DRG by modulating the IL34/CSFIR axis and inhibiting activation of the JAK2/STAT3 pathway, thereby attenuating CCI-induced neuropathic pain in rats.
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Affiliation(s)
- Bei Jing
- College of Traditional Chinese Medicine, Jinan University, Guangzhou, China
| | - Zhen-Ni Chen
- College of Traditional Chinese Medicine, Jinan University, Guangzhou, China
| | - Wai-Mei Si
- College of Traditional Chinese Medicine, Jinan University, Guangzhou, China
| | - Jia-Ji Zhao
- Chemistry & Chemical Engineering, Guangdong Pharmaceutical University, Guangzhou, China.
| | - Guo-Ping Zhao
- College of Traditional Chinese Medicine, Jinan University, Guangzhou, China.
| | - Di Zhang
- College of Traditional Chinese Medicine, Jinan University, Guangzhou, China.
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Dong X, Li W, Li C, Akan OD, Liao C, Cao J, Zhang L. Integrated transcriptomics and metabolomics revealed the mechanism of catechin biosynthesis in response to lead stress in tung tree (Vernicia fordii). THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172796. [PMID: 38692325 DOI: 10.1016/j.scitotenv.2024.172796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 04/24/2024] [Accepted: 04/24/2024] [Indexed: 05/03/2024]
Abstract
Lead (Pb) affects gene transcription, metabolite biosynthesis and growth in plants. The tung tree (Vernicia fordii) is highly adaptive to adversity, whereas the mechanisms underlying its response to Pb remain uncertain. In this work, transcriptomic and metabolomic analyses were employed to study tung trees under Pb stress. The results showed that the biomass of tung seedlings decreased with increasing Pb doses, and excessive Pb doses resulted in leaf wilting, root rot, and disruption of Pb homeostasis. Under non-excessive Pb stress, a significant change in the expression patterns of flavonoid biosynthesis genes was observed in the roots of tung seedlings, leading to changes in the accumulation of flavonoids in the roots, especially the upregulation of catechins, which can chelate Pb and reduce its toxicity in plants. In addition, Pb-stressed roots showed a large accumulation of VfWRKY55, VfWRKY75, and VfLRR1 transcripts, which were shown to be involved in the flavonoid biosynthesis pathway by gene module analysis. Overexpression of VfWRKY55, VfWRKY75, and VfLRR1 significantly increased catechin concentrations in tung roots, respectively. These data indicate that Pb stress-induced changes in the expression patterns of those genes regulate the accumulation of catechins. Our findings will help to clarify the molecular mechanism of Pb response in plants.
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Affiliation(s)
- Xiang Dong
- Key Laboratory of Cultivation and Protection for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
| | - Wenying Li
- Key Laboratory of Cultivation and Protection for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China; College of Biology and Agricultural Resources, Huanggang Normal University, Huanggang, Hubei 438000, China
| | - Changzhu Li
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, China
| | - Otobong Donald Akan
- Key Laboratory of Cultivation and Protection for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China; Faculty of Biological Science, Akwa-Ibom State University, Akwa-Ibom State, Uyo 1167, Nigeria
| | - Chancan Liao
- Key Laboratory of Cultivation and Protection for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
| | - Jie Cao
- Key Laboratory of Cultivation and Protection for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China
| | - Lin Zhang
- Key Laboratory of Cultivation and Protection for Non-wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha 410004, China.
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Moy A, Czajka K, Michael P, Nkongolo K. Transcriptome Analysis Reveals Changes in Whole Gene Expression, Biological Process, and Molecular Functions Induced by Nickel in Jack Pine ( Pinus banksiana). PLANTS (BASEL, SWITZERLAND) 2023; 12:2889. [PMID: 37571042 PMCID: PMC10421529 DOI: 10.3390/plants12152889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 07/27/2023] [Accepted: 07/30/2023] [Indexed: 08/13/2023]
Abstract
Understanding the genetic response of plants to nickel stress is a necessary step to improving the utility of plants in environmental remediation and restoration. The main objective of this study was to generate whole genome expression profiles of P. banksiana exposed to nickel ion toxicity compared to reference genotypes. Pinus banksiana seedlings were screened in a growth chamber setting using a high concentration of 1600 mg of nickel per 1 kg of soil. RNA was extracted and sequenced using the Illumina platform, followed by de novo transcriptome assembly. Overall, 25,552 transcripts were assigned gene ontology. The biological processes in water-treated samples were analyzed, and 55% of transcripts were distributed among five categories: DNA metabolic process (19.3%), response to stress (13.3%), response to chemical stimuli (8.7%), signal transduction (7.7%) and response to biotic stimulus (6.0%). For molecular function, the highest percentages of genes were involved in nucleotide binding (27.6%), nuclease activity (27.3%) and kinase activity (10.3%). Sixty-two percent of genes were associated with cellular compartments. Of these genes, 21.7% were found in the plasma membrane, 16.1% in the cytosol, 12.4% with the chloroplast and 11.9% in the extracellular region. Nickel ions induced changes in gene expression, resulting in the emergence of differentially regulated categories. Overall, there were significant changes in gene expression with a total 4128 genes upregulated and 3754 downregulated genes detected in nickel-treated genotypes compared to water-treated control plants. For biological processes, the highest percentage of upregulated genes in plants exposed to nickel were associated with the response to stress (15%), the response to chemicals (11,1%), carbohydrate metabolic processes (7.4%) and catabolic processes (7.4%). The largest proportions of downregulated genes were associated with the biosynthetic process (21%), carbohydrate metabolic process (14.3%), response to biotic stimulus (10.7%) and response to stress (10.7%). For molecular function, genes encoding for enzyme regulatory and hydrolase activities represented the highest proportion (61%) of upregulated gene. The majority of downregulated genes were involved in the biosynthetic processes. Overall, 58% of upregulated genes were located in the extracellular region and the nucleus, while 42% of downregulated genes were localized to the plasma membrane and 33% to the extracellular region. This study represents the first report of a transcriptome from a conifer species treated with nickel.
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Affiliation(s)
| | | | | | - Kabwe Nkongolo
- Biomolecular Sciences Program and Department of Biology, School of Natural Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada; (A.M.); (K.C.); (P.M.)
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Haruma T, Doyama K, Lu X, Noji K, Masuya H, Arima T, Tomiyama S, Yamaji K. Miscanthus sinensis contributes to the survival of Pinus densiflora seedlings at a mining site via providing a possible functional endophyte and maintaining symbiotic relationship between P. densiflora and endophytes from high soil temperature stress. PLoS One 2023; 18:e0286203. [PMID: 37220165 DOI: 10.1371/journal.pone.0286203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 05/11/2023] [Indexed: 05/25/2023] Open
Abstract
At a sedimentary site in an old mine site, Miscanthus sinensis formed patches, where Pinus densiflora seedlings could grow better compared with those outside the patches, indicating that M. sinensis would improve P. densiflora seedling establishment. The purpose of this study was to understand the mechanisms by which M. sinensis facilitates the survival of P. densiflora seedlings by considering the soil properties, heavy metal tolerance, and root endophytes in P. densiflora seedlings at the sedimentary site. The sedimentary site, which is a bare ground, contained high concentrations of Fe, indicating that plants should be exposed to Fe and high soil temperature stresses. Measurement of soil temperature revealed that M. sinensis suppressed sharp increases and alternation of soil temperature, resulting in reducing high soil temperature stress in P. densiflora seedlings. To adapt to the Fe stress environment, P. densiflora outside and inside the patches produced Fe detoxicants, including catechin, condensed tannin, and malic acid. Ceratobasidium bicorne and Aquapteridospora sp. were commonly isolated from P. densiflora seedlings outside and inside the patches as root endophytes, which might enhance Fe tolerance in the seedlings. Aquapteridospora sp., which is considered as a dark-septate endophyte (DSE), was also isolated from the roots of M. sinensis, suggesting that M. sinensis might play a source of a root endophyte to P. densiflora seedlings. Ceratobasidium bicorne could be classified into root endophytes showing symbiosis and weak pathogenicity to host plants. Therefore, high soil temperature stress would weaken P. densiflora seedlings, causing root endophytic C. bicorne to appear pathogenic. We suggested that P. densiflora could adapt to the Fe stress environment via producing Fe detoxicants, and M. sinensis would facilitate the establishment of P. densiflora seedlings in the sedimentary site by providing a DSE, Aquapteridospora sp., and maintaining symbiosis of C. bicorne from high soil temperature stress.
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Affiliation(s)
- Toshikatsu Haruma
- Faculty of Engineering, Division of Sustainable Resources Engineering, Hokkaido University, Kita, Nishi, Kita-ku, Sapporo, Hokkaido, Japan
| | - Kohei Doyama
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai, Tsukuba, Ibaraki, Japan
| | - Xingyan Lu
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai, Tsukuba, Ibaraki, Japan
| | - Kenta Noji
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai, Tsukuba, Ibaraki, Japan
| | - Hayato Masuya
- Department of Mushroom Science and Forest Microbiology, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, Japan
| | - Takahiko Arima
- Faculty of Engineering, Division of Sustainable Resources Engineering, Hokkaido University, Kita, Nishi, Kita-ku, Sapporo, Hokkaido, Japan
| | - Shingo Tomiyama
- Faculty of Engineering, Division of Sustainable Resources Engineering, Hokkaido University, Kita, Nishi, Kita-ku, Sapporo, Hokkaido, Japan
| | - Keiko Yamaji
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tennoudai, Tsukuba, Ibaraki, Japan
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Gurung P, Shrestha R, Lim J, Thapa Magar TB, Kim HH, Kim YW. Euonymus alatus Twig Extract Protects against Scopolamine-Induced Changes in Brain and Brain-Derived Cells via Cholinergic and BDNF Pathways. Nutrients 2022; 15:nu15010128. [PMID: 36615789 PMCID: PMC9823662 DOI: 10.3390/nu15010128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
In the current study, the therapeutic and preventive effects of Euonymus alatus (EA) twig extract were investigated in a mouse model of cognitive deficit and B35 cells. Twig extract 1 was extracted with 70% ethanol and later twig extract 2 was extracted through liquid-liquid extraction with 70% ethanol and hexane. EA twig 2 (300 mg/kg) along with the standard drug donepezil (5 mg/kg) were orally administered to the mice for 34 days. Scopolamine was given intraperitoneally for 7 days. Administration of EA twig extract 2 significantly improved the passive avoidance test (PAT) in mice. EA twigs extract also restored the scopolamine-reduced brain-derived neurotrophic factor (BDNF)/extracellular regulated kinase (ERK)/cyclic AMP responsive element binding protein (CREB) signaling in B35 cells and the mouse hippocampus. In addition, EA twig extract significantly inhibited the acetylcholine esterase (AChE) activity in B35 cells in a dose-dependent manner. Chromatography and ESI MS analysis of EA twig extract revealed the presence of flavonoids; epicatechin, taxifolin, aromadendrin, and naringenin with catechin being the most abundant. These flavonoids exerted protective effects alone and had the possibility of synergistic effects in combination. Our work unmasks the ameliorating effect of EA twig extract 2 on scopolamine-associated cognitive impairments through the restoration of cholinergic systems and the BDNF/ERK/CREB pathway.
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Affiliation(s)
- Pallavi Gurung
- Dongsung Cancer Center, Dongsung Biopharmaceutical, Daegu 41061, Republic of Korea
| | - Rajeev Shrestha
- Dongsung Cancer Center, Dongsung Biopharmaceutical, Daegu 41061, Republic of Korea
| | - Junmo Lim
- Dongsung Cancer Center, Dongsung Biopharmaceutical, Daegu 41061, Republic of Korea
| | | | - Han-Hyuk Kim
- Medical Convergence Textile Center, Gyeongbuk Technopark, Gyeongsan 38412, Republic of Korea
| | - Yong-Wan Kim
- Dongsung Cancer Center, Dongsung Biopharmaceutical, Daegu 41061, Republic of Korea
- Correspondence:
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7
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Shao C, Jiao H, Chen J, Zhang C, Liu J, Chen J, Li Y, Huang J, Yang B, Liu Z, Shen C. Carbon and Nitrogen Metabolism Are Jointly Regulated During Shading in Roots and Leaves of Camellia Sinensis. FRONTIERS IN PLANT SCIENCE 2022; 13:894840. [PMID: 35498711 PMCID: PMC9051521 DOI: 10.3389/fpls.2022.894840] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Numerous studies have shown that plant shading can promote the quality of green tea. However, the association of shading with metabolic regulation in tea leaves and roots remains unelucidated. Here, the metabolic profiling of two tea cultivars ("Xiangfeicui" and "Jinxuan") in response to shading and relighting periods during the summer season was performed using non-targeted metabolomics methods. The metabolic pathway analyses revealed that long-term shading remarkably inhibit the sugar metabolism such as glycolysis, galactose metabolism, and pentose phosphate pathway in the leaves and roots of "Xiangfeicui," and "Jinxuan" were more sensitive to light recovery changes. The lipid metabolism in the leaves and roots of "Xiangfeicui" was promoted by short-term shading, while it was inhibited by long-term shading. In addition, the intensity of the flavonoid metabolites in the leaves and roots of "Jinxuan" were upregulated with a trend of rising first and then decreasing under shading, and five flavonoid synthesis genes showed the same trend (F3H, F3'5'H, DFR, ANS, and ANR). Simultaneously, the amino acids of the nitrogen metabolism in the leaves and roots of the two cultivars were significantly promoted by long-term shading, while the purine and caffeine metabolism was inhibited in the leaves of "Xiangfeicui." Interestingly, CsGS1.1 and CsTSI, amino acid synthase genes was upregulated in the leaves and roots of two cultivars. These results indicated that shading could participate in carbon and nitrogen metabolic regulation of both leaf and root, and root metabolism could have a positive association with leaf metabolism to promote the shaded tea quality.
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Affiliation(s)
- Chenyu Shao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Haizhen Jiao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Jiahao Chen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Chenyu Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Tea Research Institution, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Jie Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Jianjiao Chen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Yunfei Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Jing Huang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Biao Yang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
| | - Chengwen Shen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
- Co-innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, China
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Kubicova L, Bachmann G, Weckwerth W, Chobot V. (±)-Catechin-A Mass-Spectrometry-Based Exploration Coordination Complex Formation with Fe II and Fe III. Cells 2022; 11:958. [PMID: 35326409 PMCID: PMC8946835 DOI: 10.3390/cells11060958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 02/06/2023] Open
Abstract
Catechin is an extensively investigated plant flavan-3-ol with a beneficial impact on human health that is often associated with antioxidant activities and iron coordination complex formation. The aim of this study was to explore these properties with FeII and FeIII using a combination of nanoelectrospray-mass spectrometry, differential pulse voltammetry, site-specific deoxyribose degradation assay, FeII autoxidation assay, and brine shrimp mortality assay. Catechin primarily favored coordination complex formation with Fe ions of the stoichiometry catechin:Fe in the ratio of 1:1 or 2:1. In the detected Fe-catechin coordination complexes, FeII prevailed. Differential pulse voltammetry, the site-specific deoxyribose degradation, and FeII autoxidation assays proved that coordination complex formation affected catechin's antioxidant effects. In situ formed Fe-catechin coordination complexes showed no toxic activities in the brine shrimp mortality assay. In summary, catechin has properties for the possible treatment of pathological processes associated with ageing and degeneration, such as Alzheimer's and Parkinson's diseases.
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Affiliation(s)
- Lenka Kubicova
- Division of Molecular Systems Biology, Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, A-1030 Vienna, Austria; (L.K.); (G.B.); (W.W.)
| | - Gert Bachmann
- Division of Molecular Systems Biology, Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, A-1030 Vienna, Austria; (L.K.); (G.B.); (W.W.)
| | - Wolfram Weckwerth
- Division of Molecular Systems Biology, Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, A-1030 Vienna, Austria; (L.K.); (G.B.); (W.W.)
- Vienna Metabolomics Center (VIME), University of Vienna, Djerassiplatz 1, A-1030 Vienna, Austria
| | - Vladimir Chobot
- Division of Molecular Systems Biology, Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, Djerassiplatz 1, A-1030 Vienna, Austria; (L.K.); (G.B.); (W.W.)
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9
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Wala M, Kołodziejek J, Mazur J, Cienkowska A. Reactions of two xeric-congeneric species of Centaurea (Asteraceae) to soils with different pH values and iron availability. PeerJ 2021; 9:e12417. [PMID: 34824914 PMCID: PMC8590394 DOI: 10.7717/peerj.12417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 10/10/2021] [Indexed: 11/20/2022] Open
Abstract
Centaurea scabiosa L. and C. stoebe Tausch are known to co-exist naturally in two extremely different types of open dry habitats in the temperate zone, alkaline xerothermic grasslands and acidic dry grasslands. However, knowledge about their preferences to edaphic conditions, including soil acidity (pH), and iron (Fe) availability is scarce. Therefore, experimental comparison of soil requirements (acidic Podzol vs alkaline Rendzina) of these species was carried out. The study was designed as a pot experiment and conducted under field conditions. Fe availability was increased by application of Fe-HBED. Reactions of plants to edaphic conditions were determined using growth measurements, leaf morphometric measurements, chlorosis scoring, chlorophyll content and chlorophyll a fluorescence (OJIP) quantification as well as determination of element content (Ca, Mg, Fe, Mn, Zn and Cu). Growth and leaf morphometrical traits of the studied congeneric species were affected similarly by the soil type and differently by the chelate treatment. Increased availability of Fe in Rendzina contrasted the species, as treatment with 25 µmol Fe-HBED kg−1 soil promoted growth only in C. stoebe. Both species turned out to be resistant to Fe-dependent chlorosis which was also reflected in only minor changes in chlorophyll a fluorescence parameters. Both species showed relatively low nutritional demands. Surprisingly, Fe-HBED did not stimulate Fe acquisition in the studied species, nor its translocation along the root:shoot axis. Furthermore, contrary to expectations, C. scabiosa took up less Fe from the acidic than alkaline soil. C. scabiosa not only absorbed more Ca and Zn but also translocated greater amounts of these elements to shoots than C. stoebe. Both species acquired more Mg on Podzol than on Rendzina which suggests adaptation allowing avoidance of aluminum (Al) toxicity on acidic soils. Overall, it seems that C. scabiosa prefers alkaline soils, whilst C. stoebe prefers acidic ones.
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Affiliation(s)
- Mateusz Wala
- Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Łódź Voivodeship, Poland
| | - Jeremi Kołodziejek
- Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Łódź Voivodeship, Poland
| | - Janusz Mazur
- Laboratory of Computer and Analytical Techniques, Faculty of Biology and Environmental Protection, University of Lodz, Łódź, Łódź Voivodeship, Poland
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Renčo M, Čerevková A, Homolová Z. Nematode communities indicate the negative impact of Reynoutria japonica invasion on soil fauna in ruderal habitats of tatra national park in Slovakia. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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11
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Haque MA, Morozova K, Ferrentino G, Scampicchio M. Electrochemical Methods to Evaluate the Antioxidant Activity and Capacity of Foods: A Review. ELECTROANAL 2021. [DOI: 10.1002/elan.202060600] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Md Azizul Haque
- Faculty of Science and Technology Free University of Bozen-Bolzano Piazza Università 5, 39100 Bozen-Bolzano Italy
- Department of Food Technology and Nutritional Science (FTNS) Mawlana Bhashani Science and Technology University (MBSTU) Tangail 1902 Bangladesh
| | - Ksenia Morozova
- Faculty of Science and Technology Free University of Bozen-Bolzano Piazza Università 5, 39100 Bozen-Bolzano Italy
| | - Giovanna Ferrentino
- Faculty of Science and Technology Free University of Bozen-Bolzano Piazza Università 5, 39100 Bozen-Bolzano Italy
| | - Matteo Scampicchio
- Faculty of Science and Technology Free University of Bozen-Bolzano Piazza Università 5, 39100 Bozen-Bolzano Italy
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Abstract
Catechin exhibits numerous physiological characteristics. In this study, we determined the photosensitivity of catechin to various lights under alkaline conditions, and the mechanisms by which catechin generates free radical species and polymerizes via a photoreaction. In addition to this, the application of catechin photolysis was investigated. A solution of catechin is transparent, but turns yellowish under blue light illumination (BLI) in neutral or weak alkaline solutions. When catechin is subjected to BLI, a dimeric catechin (proanthocyanidin) and a superoxide anion radical (O2•−) are generated in a photolytic reaction. When ascorbic acid or gallic acid is added to catechin and the mixture is subjected to BLI at alkaline pH, fewer catechin dimers and less O2•− are produced, because both acids inhibit the photosensitive oxidation of catechin. When AlCl3 is added to catechin and the mixture is subjected to BLI at pH 8, a photolytic reaction is suppressed by AlCl3, and AlCl3 acts as a catalyst for the disconnection of proanthocyanidin during photolysis. Under alkaline conditions, catechin generates O2•− via photosensitive oxidation, which suppresses the growth of Acinetobacter baumannii (A. baumannii) by at least 4 logs, and deactivates its multi-drug-resistant strain. This study shows that catechin photolysis is a process of oxidation, and that it can be safely applied as a tool for environmental applications.
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Laoué J, Depardieu C, Gérardi S, Lamothe M, Bomal C, Azaiez A, Gros-Louis MC, Laroche J, Boyle B, Hammerbacher A, Isabel N, Bousquet J. Combining QTL Mapping and Transcriptomics to Decipher the Genetic Architecture of Phenolic Compounds Metabolism in the Conifer White Spruce. FRONTIERS IN PLANT SCIENCE 2021; 12:675108. [PMID: 34079574 PMCID: PMC8166253 DOI: 10.3389/fpls.2021.675108] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/08/2021] [Indexed: 05/05/2023]
Abstract
Conifer forests worldwide are becoming increasingly vulnerable to the effects of climate change. Although the production of phenolic compounds (PCs) has been shown to be modulated by biotic and abiotic stresses, the genetic basis underlying the variation in their constitutive production level remains poorly documented in conifers. We used QTL mapping and RNA-Seq to explore the complex polygenic network underlying the constitutive production of PCs in a white spruce (Picea glauca) full-sib family for 2 years. QTL detection was performed for nine PCs and differentially expressed genes (DEGs) were identified between individuals with high and low PC contents for five PCs exhibiting stable QTLs across time. A total of 17 QTLs were detected for eight metabolites, including one major QTL explaining up to 91.3% of the neolignan-2 variance. The RNA-Seq analysis highlighted 50 DEGs associated with phenylpropanoid biosynthesis, several key transcription factors, and a subset of 137 genes showing opposite expression patterns in individuals with high levels of the flavonoids gallocatechin and taxifolin glucoside. A total of 19 DEGs co-localized with QTLs. Our findings represent a significant step toward resolving the genomic architecture of PC production in spruce and facilitate the functional characterization of genes and transcriptional networks responsible for differences in constitutive production of PCs in conifers.
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Affiliation(s)
- Justine Laoué
- Canada Research Chair in Forest Genomics, Centre for Forest Research and Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
- *Correspondence: Justine Laoué
| | - Claire Depardieu
- Canada Research Chair in Forest Genomics, Centre for Forest Research and Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
- Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Québec, QC, Canada
| | - Sébastien Gérardi
- Canada Research Chair in Forest Genomics, Centre for Forest Research and Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
| | - Manuel Lamothe
- Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Québec, QC, Canada
| | - Claude Bomal
- Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Québec, QC, Canada
| | - Aïda Azaiez
- Canada Research Chair in Forest Genomics, Centre for Forest Research and Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
| | - Marie-Claude Gros-Louis
- Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Québec, QC, Canada
| | - Jérôme Laroche
- Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
| | - Brian Boyle
- Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
| | - Almuth Hammerbacher
- Department of Zoology, Entomology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, South Africa
| | - Nathalie Isabel
- Canada Research Chair in Forest Genomics, Centre for Forest Research and Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
- Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Québec, QC, Canada
| | - Jean Bousquet
- Canada Research Chair in Forest Genomics, Centre for Forest Research and Institute for Systems and Integrative Biology, Université Laval, Québec, QC, Canada
- Jean Bousquet
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14
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Silva E, Vieira J, Nery I, Silva RA, Lima V, Guerra M. Sorting and cryopreservation of goat sperm with or without phenolic compounds. ARQ BRAS MED VET ZOO 2020. [DOI: 10.1590/1678-4162-11354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
ABSTRACT The objectives of this study were to evaluate goat sperm sorting in continuous Percoll® density gradients and gamete freezability, in the presence or absence of phenolic antioxidants. For this, semen pools were sorted, frozen, and evaluated. The non-selected group (NSg) presented lower progressive motility (PM), linearity (LIN), straightness (STR), and wobble (WOB) than the selected groups, and straight line velocity (VSL) compared to those with catechin or resveratrol. The amplitude of lateral head displacement (ALH) was higher in NSg, and quercetin reduced the mitochondrial membrane potential (MMP). After thawing, the NSg presented lower PM than the selected groups, VSL and VAP (average path velocity) than the selected group with or without catechin, LIN and WOB than the selected with or without catechin or resveratrol, and STR than the selected with catechin. Moreover, NSg presented higher ALH and BCF than the samples selected with or without catechin. Plasma membrane integrity and intact and living cells were higher in the selected groups, and MMP was lower in the NSg and the selected group with quercetin. Thus, centrifugation in Percoll® continuous density gradients is a viable methodology to select goat sperm compatible with the freezing, especially in the presence of catechin or resveratrol.
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Affiliation(s)
- E.C.B. Silva
- Universidade Federal Rural de Pernambuco, Brazil
| | | | | | | | - V.F.M.H. Lima
- Universidade Estadual Paulista Júlio de Mesquita Filho, Brazil
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15
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Pi E, Xu J, Li H, Fan W, Zhu C, Zhang T, Jiang J, He L, Lu H, Wang H, Poovaiah BW, Du L. Enhanced Salt Tolerance of Rhizobia-inoculated Soybean Correlates with Decreased Phosphorylation of the Transcription Factor GmMYB183 and Altered Flavonoid Biosynthesis. Mol Cell Proteomics 2019; 18:2225-2243. [PMID: 31467032 PMCID: PMC6823849 DOI: 10.1074/mcp.ra119.001704] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Indexed: 01/15/2023] Open
Abstract
Soybean (Glycine max (L.) Merrill) is an important component of the human diet and animal feed, but soybean production is limited by abiotic stresses especially salinity. We recently found that rhizobia inoculation enhances soybean tolerance to salt stress, but the underlying mechanisms are unaddressed. Here, we used quantitative phosphoproteomic and metabonomic approaches to identify changes in phosphoproteins and metabolites in soybean roots treated with rhizobia inoculation and salt. Results revealed differential regulation of 800 phosphopeptides, at least 32 of these phosphoproteins or their homologous were reported be involved in flavonoid synthesis or trafficking, and 27 out of 32 are transcription factors. We surveyed the functional impacts of all these 27 transcription factors by expressing their phospho-mimetic/ablative mutants in the roots of composite soybean plants and found that phosphorylation of GmMYB183 could affect the salt tolerance of the transgenic roots. Using data mining, ChIP and EMSA, we found that GmMYB183 binds to the promoter of the soybean GmCYP81E11 gene encoding for a Cytochrome P450 monooxygenase which contributes to the accumulation of ononin, a monohydroxy B-ring flavonoid that negatively regulates soybean tolerance to salinity. Phosphorylation of GmMYB183 was inhibited by rhizobia inoculation; overexpression of GmMYB183 enhanced the expression of GmCYP81E11 and rendered salt sensitivity to the transgenic roots; plants deficient in GmMYB183 function are more tolerant to salt stress as compared with wild-type soybean plants, these results correlate with the transcriptional induction of GmCYP81E11 by GmMYB183 and the subsequent accumulation of ononin. Our findings provide molecular insights into how rhizobia enhance salt tolerance of soybean plants.
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Affiliation(s)
- Erxu Pi
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants.
| | - Jia Xu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Huihui Li
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Wei Fan
- Shanghai Applied Protein Technology Co. Ltd, Shanghai, 200233, PR China
| | - Chengmin Zhu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Tongyao Zhang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Jiachen Jiang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Litao He
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Hongfei Lu
- College of Life Science, Zhejiang Sci-Tech University, Hangzhou, 310018, PR China
| | - Huizhong Wang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - B W Poovaiah
- Department of Horticulture, Washington State University, Pullman, WA 99164-6414
| | - Liqun Du
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants.
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da Silva ÍF, Vieira EA. Phytotoxic potential of Senna occidentalis (L.) Link extracts on seed germination and oxidative stress of Ipê seedlings. PLANT BIOLOGY (STUTTGART, GERMANY) 2019; 21:770-779. [PMID: 30693622 DOI: 10.1111/plb.12969] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
Senna occidentalis is an invasive plant producing a series of allelochemicals that might inhibit the development of other plants. The objective of this study was to assess the phytotoxic effect of S. occidentalis extracts on the germination, development and antioxidant defence of the native species Tabebuia chrysotricha, T. pentaphylla, T. roseoalba and Handroanthus impetiginosus (Ipê species). We evaluated the effects of chemicals extracted from S. occidentalis on the germination rate, germination speed index (GSI) and biometric parameters of the test species under controlled conditions. The effect of the extracts on the pigment content, amount of H2 O2 and malondialdehyde (MDA), and the activity of the antioxidant enzymes in roots and leaves were also tested. Alkaloids, coumarins, phenols, saponins, free steroids and condensed tannins were present in all extracts of S. occidentalis, while catechins were present only in leaf and stem extracts. Stem and root extracts caused a growth reduction in all Ipê species and total inhibition of seed germination in T. chrysotricha and T. roseoalba. All target species showed an increase in H2 O2 and MDA in radicles and leaves. Oxidative stress contributed strongly to the morphological changes, such as seed blackening, thinning and darkening of radicle tips and reduction of biomass allocation in all Ipê species. Although there was activation of antioxidant defence mechanisms, such as an increase in activity of ascorbate peroxidase (APX) and peroxidase (POD) enzymes, the joint action of the allelochemicals caused phytotoxicity, leading to cell dysfunction in all Ipê species.
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Affiliation(s)
- Í F da Silva
- Laboratory of Biology, State University of Mato Grosso do Sul, Coxim, Brazil
| | - E A Vieira
- Laboratory of Biology, State University of Mato Grosso do Sul, Coxim, Brazil
- Postgraduate Program in Plant Biodiversity and Environment, Institute of Botany, São Paulo, Brazil
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Huang ST, Hung YA, Yang MJ, Chen IZ, Yuann JMP, Liang JY. Effects of Epigallocatechin Gallate on the Stability of Epicatechin in a Photolytic Process. Molecules 2019; 24:molecules24040787. [PMID: 30813243 PMCID: PMC6413119 DOI: 10.3390/molecules24040787] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/11/2019] [Accepted: 02/19/2019] [Indexed: 12/16/2022] Open
Abstract
Catechins belonging to polyhydroxylated polyphenols are the primary compounds found in green tea. They are associated with many physiological properties. Epicatechin (EC) is a non-gallate-type catechin with four phenolic hydroxyl groups attached. The changes in EC treated with color light illumination in an alkaline condition were investigated by chromatographic and mass analyses in this study. In particular, the superoxide anion radical (O₂•-) was investigated during the EC photolytic process. EC is unstable under blue light illumination in an alkaline solution. When EC was treated with blue light illumination in an alkaline solution, O₂•- was found to occur via a photosensitive redox reaction. In addition, the generation of monomeric, dimeric, and trimeric compounds is investigated. On the other hand, epigallocatechin gallate (EGCG), which is a gallate-type catechin, is stable under blue light illumination in an alkaline solution. Adding EGCG, during the blue light illumination treatment of EC decreased photolytic formation, suggesting that gallate-type catechins can suppress the photosensitive oxidation of EC. Gallate-type catechins are formed via the esterification of non-gallate-type catechins and gallic acid (GA). The carbonyl group on the gallate moiety of gallate-type catechins appears to exhibit its effect on the stability against the photosensitive oxidation caused by blue light illumination.
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Affiliation(s)
- Shiuh-Tsuen Huang
- Department of Science Education and Application, National Taichung University of Education, Taichung 40306, Taiwan.
| | - Yi-An Hung
- Department of Biotechnology, Ming-Chuan University, Gui-Shan 33343, Taiwan.
| | - Meei-Ju Yang
- Tea Research and Extension Station, Taoyuan 32654, Taiwan.
| | - Iou-Zen Chen
- Department of Horticulture and Landscape Architecture, National Taiwan University, Taipei 10617, Taiwan.
| | - Jeu-Ming P Yuann
- Department of Biotechnology, Ming-Chuan University, Gui-Shan 33343, Taiwan.
| | - Ji-Yuan Liang
- Department of Biotechnology, Ming-Chuan University, Gui-Shan 33343, Taiwan.
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Antioxidant Properties and the Formation of Iron Coordination Complexes of 8-Hydroxyquinoline. Int J Mol Sci 2018; 19:ijms19123917. [PMID: 30544490 PMCID: PMC6321042 DOI: 10.3390/ijms19123917] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 11/26/2018] [Accepted: 12/05/2018] [Indexed: 01/01/2023] Open
Abstract
Background: The alkaloid 8-hydroxyquinoline (8HQ) is well-known for various biological activities, including antioxidant effects and especially for the formation of coordination complexes with various transition metals, such as iron, amongst others. Therefore, 8HQ was extensively explored as a promising antineurodegenerative agent. However, other authors noted pro-oxidant effects of 8HQ. Here, we explore the pro- and antioxidant properties of 8HQ, especially in context of coordination complexes with iron (II) and iron (III). Methods: Nano-electrospray−mass spectrometry, differential pulse voltammetry, deoxyribose degradation, iron (II) autoxidation, and brine shrimp mortality assays were used. Results: 8HQ formed a complex mixture of coordination complexes with iron (II) and iron (III). Furthermore, 8HQ showed antioxidant effects but no pro-oxidant ones. In the brine shrimp mortality assay, 8HQ demonstrated toxicity that decreased in the presence of iron (III). Conclusions: 8HQ is a potent antioxidant whose effects depend not only on the formation of the coordination complexes with iron ions, but surely on the scavenging activities due to the redox properties of the 8-hydroxyl group. No pro-oxidant effects were observed in the set of the used assays.
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Jan S, Mir JI, Singh DB, Faktoo SZ, Sharma A, Alyemeni MN, Ahmad P. Effect of environmental variables on phytonutrients of Origanum vulgare L. in the sub-humid region of the northwestern Himalayas. ENVIRONMENTAL MONITORING AND ASSESSMENT 2018; 190:571. [PMID: 30187208 DOI: 10.1007/s10661-018-6951-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 08/27/2018] [Indexed: 06/08/2023]
Abstract
Ecological and soil physiochemical parameters impact the crop quality and development. In spite of the huge commercial prospective, the phytonutrient and chemometric profiles of Himalayan oregano (Origanum vulgare L.) have not been evaluated, and their relationships with ecological parameters are still lacking. The objective of this research study was to evaluate the disparity in the phytonutrient profiles of different ecotypes of O. vulgare in wild and cultivated populations and determine whether such variation was related to the diverse climatic and edaphic conditions prevailing in the northwestern Himalayas. Micrometeorological, atomic absorption spectroscopy for micro-elemental analysis was determined for soil. HPLC was used to determine the disparity in phytonutrient (quercetin, betacarotene, ascorbic acid, and catechin) and phytochemical (arbutin) levels. Cultivated populations had lower phytonutrient levels than wild populations. The habitat exhibiting pH values ranging from 6 to 7 elevated organic carbon (2.42%), nitrogen (97.41 kg ha-1), and manganese (10-12 μg g-1) and zinc contents (0.39-0.50%) show luxirant growth of Origanum vulgarel. The phytonutrient (quercetin, betacarotene, ascorbic acid, arbutin, and catechin) levels had a direct relationship with UV-B flux (r2 = 0.82) and potassium (r2 = 0.97). Wild accessions predominantly contained catechin and ascorbic acid, with maximum values of 163.8 and 46.88 μg g-1, respectively, while the cultivated accessions had the highest level of arbutin (53.42 μg g-1). Maximum variation was observed in quercetin (114.61%) followed by β-carotene (87.53%). Cultivated accessions had less quercetin (0.04-1.25 μg g-1) than wild accessions (1.25-2.87 μg g-1). Wild accessions had higher phytonutrient values for catechin, β-carotene, and ascorbic acid while cultivated accessions had maximum values for arbutin. The correlation of environmental variables with phytonutrient levels paves the way for metabolomic-guided enhancement of agricultural practices for better herb quality.
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Affiliation(s)
- Sumira Jan
- ICAR-Central Institute of Temperate Horticulture, Rangreth, Air Field, Srinagar, Jammu and Kashmir, India.
| | - Javid Iqbal Mir
- ICAR-Central Institute of Temperate Horticulture, Rangreth, Air Field, Srinagar, Jammu and Kashmir, India
| | - Desh Beer Singh
- ICAR-Central Institute of Temperate Horticulture, Rangreth, Air Field, Srinagar, Jammu and Kashmir, India
| | - Shafia Zaffar Faktoo
- ICAR-Central Institute of Temperate Horticulture, Rangreth, Air Field, Srinagar, Jammu and Kashmir, India
| | - Anil Sharma
- ICAR-Central Institute of Temperate Horticulture, Rangreth, Air Field, Srinagar, Jammu and Kashmir, India
| | - Mohammad Nassar Alyemeni
- Botany and Microbiology Department, College of Science, King Saud University, P. O. Box. 2455, Riyadh, 11451, Saudi Arabia
| | - Parvaiz Ahmad
- Department of Botany, S.P. College, Srinagar, Jammu and Kashmir, 190001, India
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Pi E, Zhu C, Fan W, Huang Y, Qu L, Li Y, Zhao Q, Ding F, Qiu L, Wang H, Poovaiah BW, Du L. Quantitative Phosphoproteomic and Metabolomic Analyses Reveal GmMYB173 Optimizes Flavonoid Metabolism in Soybean under Salt Stress. Mol Cell Proteomics 2018; 17:1209-1224. [PMID: 29496908 PMCID: PMC5986248 DOI: 10.1074/mcp.ra117.000417] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 02/03/2018] [Indexed: 01/05/2023] Open
Abstract
Salinity causes osmotic stress to crops and limits their productivity. To understand the mechanism underlying soybean salt tolerance, proteomics approach was used to identify phosphoproteins altered by NaCl treatment. Results revealed that 412 of the 4698 quantitatively analyzed phosphopeptides were significantly up-regulated on salt treatment, including a phosphopeptide covering the serine 59 in the transcription factor GmMYB173. Our data showed that GmMYB173 is one of the three MYB proteins differentially phosphorylated on salt treatment, and a substrate of the casein kinase-II. MYB recognition sites exist in the promoter of flavonoid synthase gene GmCHS5 and one was found to mediate its recognition by GmMYB173, an event facilitated by phosphorylation. Because GmCHS5 catalyzes the synthesis of chalcone, flavonoids derived from chalcone were monitored using metabolomics approach. Results revealed that 24 flavonoids of 6745 metabolites were significantly up-regulated after salt treatment. We further compared the salt tolerance and flavonoid accumulation in soybean transgenic roots expressing the 35S promoter driven cds and RNAi constructs of GmMYB173 and GmCHS5, as well as phospho-mimic (GmMYB173S59D ) and phospho-ablative (GmMYB173S59A ) mutants of GmMYB173 Overexpression of GmMYB173S59D and GmCHS5 resulted in the highest increase in salt tolerance and accumulation of cyaniding-3-arabinoside chloride, a dihydroxy B-ring flavonoid. The dihydroxy B-ring flavonoids are more effective as anti-oxidative agents when compared with monohydroxy B-ring flavonoids, such as formononetin. Hence the salt-triggered phosphorylation of GmMYB173, subsequent increase in its affinity to GmCHS5 promoter and the elevated transcription of GmCHS5 likely contribute to soybean salt tolerance by enhancing the accumulation of dihydroxy B-ring flavonoids.
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Affiliation(s)
- Erxu Pi
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants;
| | - Chengmin Zhu
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Wei Fan
- §Shanghai Applied Protein Technology Co. Ltd, Shanghai, 200233, PR China
| | - Yingying Huang
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Liqun Qu
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Yangyang Li
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Qinyi Zhao
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Feng Ding
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants
| | - Lijuan Qiu
- ¶The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, P.R. China
| | - Huizhong Wang
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants;
| | - B W Poovaiah
- ‖Department of Horticulture, Washington State University, Pullman, Washington 99164-6414
| | - Liqun Du
- From the ‡College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, 310036, PR China; Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants;
- ‖Department of Horticulture, Washington State University, Pullman, Washington 99164-6414
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Subramaniyan V, Mathiyalagan S, Praveenkumar A, Srinivasan P, Palani M, Ravichandran V, Nallasamy P. Molecular docking and ADME properties of bioactive molecules against human acid-beta-glucosidase enzyme, cause of Gaucher's disease. In Silico Pharmacol 2018; 6:3. [PMID: 30607316 DOI: 10.1007/s40203-018-0039-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 03/02/2018] [Indexed: 12/31/2022] Open
Abstract
Gaucher disease is one of the common lysosomal storage diseases widespread all over the world. It is divided into three types such as type 1 (non-neuropathic), type 2 (acute infantile neuropathic) and type 3 (chronic neuropathic). This is caused by the deficiency of glucocerebrosidases from the midpoint nervous system. Recent years, computational tools are very important and play a vital role in identifying new leads for disease treatment. This study was performed to screen the effective bioactive molecules against glucocerebrosidases. In this study, Molecular docking and ADME profiles of bioactive molecules were found with the help of Schrödinger software. Results showed that, (-)-epicatechin are having best docking score and good binding affinity than other ligands. Hence, we concluded that the (-)-epicatechin may be a better drug candidate for gaucher disease which can be explored further.
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Affiliation(s)
- Vijayakumar Subramaniyan
- 1Computational Phytochemistry Lab, P.G. and Research Department of Botany and Microbiology, A.V.V.M. Sri Pushpam College (Autonomous), Poondi, Thanjavur (Dt), Tamil Nadu 613 503 India
| | - Sathiya Mathiyalagan
- 1Computational Phytochemistry Lab, P.G. and Research Department of Botany and Microbiology, A.V.V.M. Sri Pushpam College (Autonomous), Poondi, Thanjavur (Dt), Tamil Nadu 613 503 India.,2State Key Laboratory of Microbial Technology, Helmholtz Institute of Biotechnology, School of Life Science, Shandong University, Jinan, People's Republic of China.,Department of Zoology, Arulmigu Palani Andavar College of Arts and Culture, Palani, Tamil Nadu India
| | - Arulmozhi Praveenkumar
- 1Computational Phytochemistry Lab, P.G. and Research Department of Botany and Microbiology, A.V.V.M. Sri Pushpam College (Autonomous), Poondi, Thanjavur (Dt), Tamil Nadu 613 503 India.,2State Key Laboratory of Microbial Technology, Helmholtz Institute of Biotechnology, School of Life Science, Shandong University, Jinan, People's Republic of China.,Department of Zoology, Arulmigu Palani Andavar College of Arts and Culture, Palani, Tamil Nadu India
| | - Prabhu Srinivasan
- 1Computational Phytochemistry Lab, P.G. and Research Department of Botany and Microbiology, A.V.V.M. Sri Pushpam College (Autonomous), Poondi, Thanjavur (Dt), Tamil Nadu 613 503 India
| | - Manogar Palani
- 1Computational Phytochemistry Lab, P.G. and Research Department of Botany and Microbiology, A.V.V.M. Sri Pushpam College (Autonomous), Poondi, Thanjavur (Dt), Tamil Nadu 613 503 India
| | - Vinothkannan Ravichandran
- 2State Key Laboratory of Microbial Technology, Helmholtz Institute of Biotechnology, School of Life Science, Shandong University, Jinan, People's Republic of China
| | - Parameswari Nallasamy
- Department of Zoology, Arulmigu Palani Andavar College of Arts and Culture, Palani, Tamil Nadu India
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Potential allelopathic effects of the tropical legume Sesbania virgata on the alien Leucaena leucocephala related to seed carbohydrate metabolism. Biol Invasions 2017. [DOI: 10.1007/s10530-017-1524-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Chen LY, Wu JY, Liang JY. Using chromatography and mass spectrometry to monitor isomerization of catechin in alkaline aqueous with thermal processing. J FOOD PROCESS PRES 2017. [DOI: 10.1111/jfpp.13365] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Liang-Yü Chen
- Department of Biotechnology; Ming-Chuan University; Gui-Shan 33343 Taiwan
| | - Jun-Yun Wu
- Department of Biotechnology; Ming-Chuan University; Gui-Shan 33343 Taiwan
| | - Ji-yuan Liang
- Department of Biotechnology; Ming-Chuan University; Gui-Shan 33343 Taiwan
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Chobot V, Hadacek F, Bachmann G, Weckwerth W, Kubicova L. Pro- and Antioxidant Activity of Three Selected Flavan Type Flavonoids: Catechin, Eriodictyol and Taxifolin. Int J Mol Sci 2016; 17:ijms17121986. [PMID: 27898046 PMCID: PMC5187786 DOI: 10.3390/ijms17121986] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 11/14/2016] [Accepted: 11/21/2016] [Indexed: 12/04/2022] Open
Abstract
The flavanol (±)-catechin shows an OH group but no 4-keto group on ring C (C3), and no conjugation between ring A and B. The related flavanone (+)-eriodictyol has a keto group on C4 but no 3-OH group on ring C. (+)-Taxifolin, another flavanone, has an OH on C3 and a keto group on C4 of the C ring. Deoxyribose degradation assay systems, with hydrogen peroxide and ascorbic acid either added or omitted, were performed in variants in which Fe(III) was added in a complex with ethylenediaminetetraacetic acid (EDTA). In combination with differential pulse voltammetry (DVP), the specific redox-chemical contributions of the ring A m-dihydroxyl groups could be explored more specifically in addition to those of the traditionally investigated o-dihydroxyl groups of ring B.
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Affiliation(s)
- Vladimir Chobot
- Division of Molecular Systems Biology, Department of Ecogenomics and Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
| | - Franz Hadacek
- Department of Plant Biochemistry, Albrecht-von-Haller Institut, Georg-August-Universität Göttingen, Justus-von-Liebig-Weg 11, D-37077 Göttingen, Germany.
| | - Gert Bachmann
- Division of Molecular Systems Biology, Department of Ecogenomics and Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
| | - Wolfram Weckwerth
- Division of Molecular Systems Biology, Department of Ecogenomics and Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
| | - Lenka Kubicova
- Division of Molecular Systems Biology, Department of Ecogenomics and Systems Biology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria.
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Liang JY, Wu JY, Yang MY, Hu A, Chen LY. Photo-catalytic polymerization of catechin molecules in alkaline aqueous. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 165:115-120. [PMID: 27776259 DOI: 10.1016/j.jphotobiol.2016.10.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 10/17/2016] [Indexed: 10/20/2022]
Abstract
Polyphenols are associated with a wide range of physiological properties. Catechin is a flavan-3-ol with five phenolic hydroxyl groups. After blue light illumination, the transparent solution of catechin became yellowish. The effects of visible light illumination (400-800nm) were investigated on molecular structures and antioxidant capacities of catechin. Under the neutral or alkaline aqueous with the illumination of blue light, the photolysis and polymerization of catechin were observed in this study. A chromogenic catechin dimer was separated and identified as a proanthocyanidin by the chromatographic technique and mass spectrometry. For quantitative evaluation, the signal intensities of the catechin and the photochemical product show a negative correlation in the liquid chromatograms. The oligomer of flavan-3-ols (catechin dimer) is suggested as a dimeric B type proanthocyanidin, which has the molecular formula C30H26O12 and 578.14g/mol in exact mass. The mass spectrum of catechin dimer had characteristic ion signals in m/z 577, 560, 439Da. However, the total phenolic contents and scavenging O2- activity of catechin treated by blue light illumination are not changed significantly at the neutral or alkaline aqueous. Our results of photocatalytic oligomers of catechin provide a novel way to explain the sensory changes of green tea and a biochemical mechanism under the irradiation environments.
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Affiliation(s)
- Ji-Yuan Liang
- Department of Biotechnology, Ming-Chuan University, Gui-Shan 33343, Taiwan
| | - Jun-Yun Wu
- Department of Biotechnology, Ming-Chuan University, Gui-Shan 33343, Taiwan
| | - Ming-Yeh Yang
- Institute of Medical Biotechnology, Tzu-Chi University, Hualien 97004, Taiwan
| | - Anren Hu
- Institute of Medical Biotechnology, Tzu-Chi University, Hualien 97004, Taiwan
| | - Liang-Yü Chen
- Department of Biotechnology, Ming-Chuan University, Gui-Shan 33343, Taiwan.
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Sheikh ZA, Siddiqui ZA, Naveed S, Usmanghani K. Quantitative Determination of Catechin as Chemical Marker in Pediatric Polyherbal Syrup by HPLC/DAD. J Chromatogr Sci 2016; 54:1324-7. [PMID: 27165575 DOI: 10.1093/chromsci/bmw078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Indexed: 11/13/2022]
Abstract
Vivabon syrup is a balanced composition of dietary ingredients of phytopharmaceutical nature for maintaining the physique, vigor, vitality and balanced growth of children. The herbal ingredients of pediatric syrup are rich in bioflavonoid, proteins, vitamins, glycosides and trace elements. Vivabon is formulated with herbal drugs such as Phoenix sylvestris, Emblica officinalis, Withania somnifera, Centella asiatica, Amomum subulatum, Zingiber officinalis, Trigonella foenum-graecum, Centaurea behen and Piper longum Catechins are flavan-3-ols that are found widely in the medicinal herbs and are utilized for anti-inflammatory, cardio protective, hepato-protective, neural protection and other biological activities. In general, the dietary intake of flavonoids has been regarded traditionally as beneficial for body growth. Standardization of Vivabon syrup dosage form using HPLC/DAD has been developed for quantitative estimation of Catechin as a chemical marker. The method was validated as per ICH guidelines. Validation studies demonstrated that the developed HPLC method is quite distinct, reproducible as well as quick and fast. The relatively high recovery and low comparable standard deviation confirm the suitability of the developed method for the determination of Catechin in syrup.
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Affiliation(s)
- Zeeshan A Sheikh
- Research and Development Department, Herbion Pakistan (Pvt.) Limited, Plot 30, Sector 28, Korangi industrial Area, Karachi 74900, Pakistan
| | - Zafar A Siddiqui
- Research and Development Department, Herbion Pakistan (Pvt.) Limited, Plot 30, Sector 28, Korangi industrial Area, Karachi 74900, Pakistan
| | - Safila Naveed
- Department of Clinical Pharmacy and Health Care, Faculty of Pharmacy, Jinnah University for Women, Karachi, Pakistan
| | - Khan Usmanghani
- Research and Development Department, Herbion Pakistan (Pvt.) Limited, Plot 30, Sector 28, Korangi industrial Area, Karachi 74900, Pakistan Department of Clinical Pharmacy and Health Care, Faculty of Pharmacy, Jinnah University for Women, Karachi, Pakistan
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Kayashima Y, Murata S, Sato M, Matsuura K, Asanuma T, Chimoto J, Ishii T, Mochizuki K, Kumazawa S, Nakayama T, Yamakawa-Kobayashi K. Tea polyphenols ameliorate fat storage induced by high-fat diet in Drosophila melanogaster. Biochem Biophys Rep 2015; 4:417-424. [PMID: 29124233 PMCID: PMC5669444 DOI: 10.1016/j.bbrep.2015.10.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 09/27/2015] [Accepted: 10/28/2015] [Indexed: 11/17/2022] Open
Abstract
Background Polyphenols in tea are considered beneficial to human health. However, many such claims of their bioactivity still require in vitro and in vivo evidence. Results Using Drosophila melanogaster as a model multicellular organism, we assess the fat accumulation-suppressing effects of theaflavin (TF), a tea polyphenol; epitheaflagallin (ETG), which has an unknown function; and epigallocatechin gallate (EGCg), a prominent component of green tea. Dietary TF reduced the malondialdehyde accumulation related to a high-fat diet in adult flies. Other physiological and genetic responses induced by the high-fat diet, such as lipid accumulation in the fat body and expression of lipid metabolism-related genes, were ameliorated by the addition of TF, ETG, and EGCg, in some cases approaching respective levels without high-fat diet exposure. Continuous ingestion of the three polyphenols resulted in a shortened lifespan. Conclusion We provide evidence in Drosophila that tea polyphenols have a fat accumulation-suppressing effect that has received recent attention. We also suggest that tea polyphenols can provide different desirable biological activities depending on their composition and the presence or absence of other chemical components. Tea polyphenols have a fat accumulation-suppressing effect in Drosophila. Dietary theaflavin ameliorates high-fat diet-induced hydroperoxidase accumulation. The novel tea polyphenol epitheaflagallin strongly suppresses lipid accumulation. The beneficial effects of tea polyphenols can be enhanced by altering composition.
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Affiliation(s)
- Yasunari Kayashima
- Department of Food and Nutrition, Yamanashi Gakuin Junior College, 2-4-5 Sakaori, Kofu-shi, Yamanashi 400-8575, Japan
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
- Corresponding author at: Department of Food and Nutrition, Yamanashi Gakuin Junior College, 2-4-5 Sakaori, Kofu-shi, Yamanashi 400-8575, Japan. Fax: +81 55 224 1396.Department of Food and Nutrition, Yamanashi Gakuin Junior College2-4-5 SakaoriKofu-shiYamanashi400-8575Japan
| | - Shinichi Murata
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Misaki Sato
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Kanako Matsuura
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Toshimichi Asanuma
- Industrial Research Institute of Shizuoka Prefecture, 2078 Makigaya, Aoi-ku, Shizuoka 421-1298, Japan
| | - Junko Chimoto
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Takeshi Ishii
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Kazuo Mochizuki
- Industrial Research Institute of Shizuoka Prefecture, 2078 Makigaya, Aoi-ku, Shizuoka 421-1298, Japan
| | - Shigenori Kumazawa
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Tsutomu Nakayama
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Kimiko Yamakawa-Kobayashi
- School of Food and Nutritional Sciences, Graduate School of Integrated Pharmaceutical and Nutritional Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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Novaes P, Imatomi M, Varela RM, Molinillo JMG, Lacret R, Gualtieri SCJ, Macías FA. Allelopathic potential of Rapanea umbellata leaf extracts. Chem Biodivers 2014; 10:1539-48. [PMID: 23939802 DOI: 10.1002/cbdv.201200367] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Indexed: 11/06/2022]
Abstract
The stressful conditions associated with the Brazilian savanna (Cerrado) environment were supposed to favor higher levels of allelochemicals in Rapanea umbellata from this ecosystem. The allelopathic potential of R. umbellata leaf extracts was studied using the etiolated wheat coleoptile and standard phytotoxicity bioassays. The most active extract was selected to perform a bioassay-guided isolation, which allowed identifying lutein (1) and (-)-catechin (2) as potential allelochemicals. Finally, the general bioactivity of the two compounds was studied, which indicated that the presence of 1 might be part of the defense mechanisms of this plant.
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Affiliation(s)
- Paula Novaes
- Departamento de Botanica, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235, São Carlos - São Paulo, CEP 13565-905, Brazil
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The impact of microbial biotransformation of catechin in enhancing the allelopathic effects of Rhododendron formosanum. PLoS One 2013; 8:e85162. [PMID: 24391991 PMCID: PMC3877349 DOI: 10.1371/journal.pone.0085162] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 11/23/2013] [Indexed: 11/19/2022] Open
Abstract
Rhododendron formosanum is distributed widely in the central mountains in Taiwan and the major allelopathic compound in the leaves has been identified as (-)-catechin, which is also a major allelochemical of an invasive spotted knapweed in North America. Soil microorganisms play key roles in ecosystems and influence various important processes, including allelopathy. However, no microorganism has been identified as an allelochemical mediator. This study focused on the role of microorganisms in the allelopathic effects of R. formosanum. The microorganism population in the rhizosphere of R. formosanum was investigated and genetic analysis revealed that the predominant genera of microorganisms in the rhizosphere of R. formosanum were Pseudomonas, Herbaspirillum, and Burkholderia. The dominant genera Pseudomonas utilized (-)-catechin as the carbon source and catalyzed the conversion of (-)-catechin into protocatechuic acid in vitro. The concentrations of allelochemicals in the soil were quantified by liquid chromatography-electrospray ionization/tandem mass spectrometry. The concentration of (-)-catechin in the soil increased significantly during the extreme rainfall in the summer season and suppressed total bacterial populations. Protocatechuic acid accumulation was observed while total bacterial populations increased abundantly in both laboratory and field studies. Allelopathic interactions were tested by evaluating the effects of different allelochemicals on the seed germination, radicle growth, and photosynthesis system II of lettuce. Protocatechuic acid exhibited higher phytotoxicity than (-)-catechin did and the effect of (-)-catechin on the inhibition of seed germination was enhanced by combining it with protocatechuic acid at a low concentration. This study revealed the significance of the allelopathic interactions between R. formosanum and microorganisms in the rhizosphere. These findings demonstrate that knowledge regarding the precise biotransformation process of (-)-catechin by microorganisms in the environment is necessary to increase our understanding of allelopathy.
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Soltys D, Gniazdowska A, Bogatek R. Inhibition of tomato (Solanum lycopersicum L.) root growth by cyanamide is not always accompanied with enhancement of ROS production. PLANT SIGNALING & BEHAVIOR 2013; 8:e23994. [PMID: 23428892 PMCID: PMC3907420 DOI: 10.4161/psb.23994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 02/13/2013] [Indexed: 05/24/2023]
Abstract
Mode of action of allelochemicals in target plants is currently widely studied. Cyanamide is one of the newly discovered allelochemical, biosynthesized in hairy vetch. Recently, it has been recognized that cyanamide is plant growth inhibitor, which affects mitosis in root tip cells and causes,e.g., disorder in phytohormonal balance. We also demonstrated that CA may act as oxidative stress agent but it strictly depends on plant species, exposure time and doses. Roots of tomato seedling treated with water solution of 1.2 mM cyanamide did not exhibit elevated reactive oxygen species concentration during the whole culture period.
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Macáková K, Mladěnka P, Filipský T, Říha M, Jahodář L, Trejtnar F, Bovicelli P, Proietti Silvestri I, Hrdina R, Saso L. Iron reduction potentiates hydroxyl radical formation only in flavonols. Food Chem 2012; 135:2584-92. [PMID: 22980846 DOI: 10.1016/j.foodchem.2012.06.107] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 06/13/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
Abstract
Flavonoids, substantial components of the human diet, are generally considered to be beneficial. However, they may possess possible pro-oxidative effects, which could be based on their reducing potential. The aims of this study were to evaluate the ability of 26 flavonoids to reduce ferric ions at relevant pH conditions and to find a possible relationship with potentiation of hydroxyl radical production. A substantial ferric ions reduction was achieved under acidic conditions, particularly by flavonols and flavanols with the catecholic ring B. Apparently corresponding bell-shaped curves displaying the pro-oxidant effect of flavonols quercetin and kaempferol on iron-based Fenton reaction were documented. Several flavonoids were efficient antioxidants at very low concentrations but rather inefficient or pro-oxidative at higher concentrations. Flavonols, morin and rutin were progressively pro-oxidant, while 7-hydroxyflavone and hesperetin were the only flavonoids with dose-dependent inhibition of hydroxyl radical production. Conclusively, administration of flavonoids may lead to unpredictable consequences with few exceptions.
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Affiliation(s)
- Kateřina Macáková
- Department of Pharmaceutical Botany and Ecology, Faculty of Pharmacy in Hradec Králové, Charles University in Prague, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
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Chobot V, Hadacek F. Exploration of pro-oxidant and antioxidant activities of the flavonoid myricetin. Redox Rep 2012; 16:242-7. [PMID: 22195992 DOI: 10.1179/1351000211y.0000000015] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES Flavonoids are ubiquitous phenolic plant metabolites. Many of them are well known for their pro- and antioxidant properties. Myricetin has been reported to be either a potent antioxidant or a pro-oxidant depending on the conditions. The reaction conditions for the pro- and antioxidant activities were therefore investigated using variations of the deoxyribose degradation assay systems. METHODS The deoxyribose degradation assay systems were conducted as follows; H(2)O(2)/Fe(III)/ascorbic acid, H(2)O(2)/Fe(III), Fe(III)/ascorbic acid, and Fe(III). Each system was carried out in two variants, FeCl(3) (iron ions added as FeCl(3)) and FeEDTA (iron added in complex with ethylenediaminetetraacetic acid). RESULTS When ascorbic acid was present, myricetin showed antioxidant properties, especially when it occurred in complex with iron. In ascorbic acid-free systems, pro-oxidant activities prevailed, which where enhanced if iron was in complex with EDTA. DISCUSSION Myricetin's antioxidant activity depends on both the reactive oxygen species (ROS) scavenging and iron ions chelation properties. The pro-oxidative properties are caused by reduction of molecular oxygen to ROS and iron(III) to iron(II). Myricetin is able to substitute for ascorbic acid albeit less efficiently.
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Affiliation(s)
- Vladimir Chobot
- Department of Chemical Ecology and Ecosystem Research, University of Vienna, Vienna, Austria.
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Co M, Zettersten C, Nyholm L, Sjöberg PJ, Turner C. Degradation effects in the extraction of antioxidants from birch bark using water at elevated temperature and pressure. Anal Chim Acta 2012; 716:40-8. [DOI: 10.1016/j.aca.2011.04.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 04/15/2011] [Accepted: 04/18/2011] [Indexed: 11/16/2022]
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Braicu C, Pilecki V, Balacescu O, Irimie A, Berindan Neagoe I. The relationships between biological activities and structure of flavan-3-ols. Int J Mol Sci 2011; 12:9342-53. [PMID: 22272136 PMCID: PMC3257133 DOI: 10.3390/ijms12129342] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 11/23/2011] [Accepted: 12/05/2011] [Indexed: 11/20/2022] Open
Abstract
Flavan-3-ols are involved in multiple metabolic pathways that induce inhibition of cell proliferation. We studied the structure-activity relationship of gallic acid (GA) and four flavan-3-ols: epigallocatechin gallate (EGCG), epigallocatechin (EGC), catechin (C), and epicatechin (EC). We measured the cell viability by the MTT assay and we determined the concentration of testing compound required to reduce cell viability by 50% (IC50). All tested compounds showed a dose-dependent and time-dependent inhibitory antiproliferative effect on Hs578T cells; IC50 values varying from the 15.81 to 326.8 μM. Intracellular ROS (reactive oxygen species) were quantified using a fluorescent probe 2′,7′-dichlorofluorescin diacetate (DCFH-DA). Only the treatment with 10 μM EGC and EGCG was able to induce a significant decrease of ROS concentration and increased levels of ROS were registered for 100 μM EGCG, EGC and GA. Flavans-3-ols and GA induced apoptosis in a dose- and time-dependent manner, which indicated that the induction of apoptosis mediated their cytotoxic activity at least partially. The galloylated catechins have shown a stronger antiproliferative activity and apoptotic effect than the one produced by non galloylated catechins. The galloylated flavan-3-ols are potential therapeutic agents for patients with triple negative breast cancer via induction of apoptosis.
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Affiliation(s)
- Cornelia Braicu
- Department of Functional Genomics and Experimental Pathology, Cancer Institute “Ion Chiricuta”, 34-35 Republicii, Cluj-Napoca 400015, Romania; E-Mails: (C.B.); (O.B.)
| | - Valentina Pilecki
- Faculty of Biology and Geology, Babes-Bolyai University, 44 Gheorghe Bilascu, Cluj-Napoca 4000006, Romania; E-Mail:
| | - Ovidiu Balacescu
- Department of Functional Genomics and Experimental Pathology, Cancer Institute “Ion Chiricuta”, 34-35 Republicii, Cluj-Napoca 400015, Romania; E-Mails: (C.B.); (O.B.)
| | - Alexandru Irimie
- Department of Surgical Oncology, University of Medicine and Pharmacy, “Iuliu Hatieganu”, 8 Victor Babes, Cluj-Napoca 400427, Romania; E-Mail:
- Department of Surgery, Cancer Institute “Ion Chiricuta”, 34-35 Republicii, Cluj-Napoca 400015, Romania
| | - Ioana Berindan Neagoe
- Department of Functional Genomics and Experimental Pathology, Cancer Institute “Ion Chiricuta”, 34-35 Republicii, Cluj-Napoca 400015, Romania; E-Mails: (C.B.); (O.B.)
- Department of Immunology, University of Medicine and Pharmacy “Iuliu Hatieganu”, 8 Victor Babes, Cluj-Napoca 400427, Romania
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +40-264-450749; Fax: +40-264-598885
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Inderjit, Wardle DA, Karban R, Callaway RM. The ecosystem and evolutionary contexts of allelopathy. Trends Ecol Evol 2011; 26:655-62. [DOI: 10.1016/j.tree.2011.08.003] [Citation(s) in RCA: 194] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 08/11/2011] [Accepted: 08/15/2011] [Indexed: 10/17/2022]
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Wang J, Zhu J, Liu S, Liu B, Gao Y, Wu Z. Generation of reactive oxygen species in cyanobacteria and green algae induced by allelochemicals of submerged macrophytes. CHEMOSPHERE 2011; 85:977-982. [PMID: 21757220 DOI: 10.1016/j.chemosphere.2011.06.076] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 06/09/2011] [Accepted: 06/19/2011] [Indexed: 05/31/2023]
Abstract
Inhibition of phytoplankton by allelochemicals released by submerged macrophytes is reported to be one of the mechanisms that maintain a clear-water state in shallow lakes. In order to elucidate this mechanism, the ability of six polyphenols and two long-chain fatty acids to induce the generation of reactive oxygen species (ROS) in phytoplankton was studied using the ROS sensitive probe 2',7'- dichlorodihydrofluorescein diacetate (DCFH-DA). The results showed that only (+)-catechin (CA) and pyrogallic acid (PA) could induce ROS formation in Microcystis aeruginosa and Pseudokirchneriella subcapitata. 25 mg L⁻¹ CA caused 1.2, 1.4 and 1.8 times increase of ROS levels in M. aeruginosa at 1, 2 and 4h exposure, respectively, and, correspondingly in P. subcapitata cells, these values were 3.7, 6.2 and 7.7, respectively. PA also significantly increased the levels of intracellular ROS in P. subcapitata (P < 0.01); however, significant ROS generation in M. aeruginosa was observed at only 4h exposure (P < 0.01). Light enhanced ROS generation in CA treated cells, but not in the cells treated with PA. CA and PA may act as redox cyclers after uptake by test organisms and produce ROS successively. These results suggest that the oxidative stress induced by the redox cycling property of allelochemicals may be one of the important causes for the inhibitory effect of some submerged macrophytes towards undesired phytoplankton in natural aquatic ecosystems.
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Affiliation(s)
- Jing Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
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Soltys D, Rudzińska-Langwald A, Kurek W, Gniazdowska A, Sliwinska E, Bogatek R. Cyanamide mode of action during inhibition of onion (Allium cepa L.) root growth involves disturbances in cell division and cytoskeleton formation. PLANTA 2011; 234:609-21. [PMID: 21573814 PMCID: PMC3162148 DOI: 10.1007/s00425-011-1429-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Accepted: 04/28/2011] [Indexed: 05/08/2023]
Abstract
Cyanamide is an allelochemical produced by hairy vetch (Vicia villosa Roth.). Its phyotoxic effect on plant growth was examined on roots of onion (Allium cepa L.) bulbs. Water solution of cyanamide (2-10 mM) restricted growth of onion roots in a dose-dependent manner. Treatment of onion roots with cyanamide resulted in a decrease in root growth rate accompanied by a decrease in accumulation of fresh and dry weight. The inhibitory effect of cyanamide was reversed by its removal from the environment, but full recovery was observed only for tissue treated with this chemical at low concentration (2-6 mM). Cytological observations of root tip cells suggest that disturbances in cell division may explain the strong cyanamide allelopathic activity. Moreover, in cyanamide-treated onion the following changes were detected: reduction of mitotic cells, inhibition of proliferation of meristematic cells and cell cycle, and modifications of cytoskeleton arrangement.
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Affiliation(s)
- Dorota Soltys
- Department of Plant Physiology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Anna Rudzińska-Langwald
- Department of Botany, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Wojciech Kurek
- Department of Botany, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Agnieszka Gniazdowska
- Department of Plant Physiology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
| | - Elwira Sliwinska
- Department of Plant Genetics and Biotechnology, University of Technology and Life Sciences in Bydgoszcz, Kaliskiego 7, 85-789 Bydgoszcz, Poland
| | - Renata Bogatek
- Department of Plant Physiology, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
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Lee YJ, Kim SJ, Heo TH. Protective effect of catechin in type I Gaucher disease cells by reducing endoplasmic reticulum stress. Biochem Biophys Res Commun 2011; 413:254-8. [PMID: 21884680 DOI: 10.1016/j.bbrc.2011.08.080] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Accepted: 08/16/2011] [Indexed: 11/25/2022]
Abstract
Gaucher disease (GD) is the most common lysosomal storage disorder (LSD) and is divided into three phenotypes, I, II, and III. Type I is the most prevalent form and has its onset in adulthood. The degree of endoplasmic reticulum (ER) stress is one of the factors that determine GD severity. It has recently been reported that antioxidants reduce ER stress and apoptosis by scavenging the oxidants that cause oxidative stress. For this report, we investigated the possibility that catechin can act on type I GD patient cells to alleviate the pathogenic conditions of GD. We treated GD cells with catechin and examined the expression level of GRP78/BiP (an ER stress marker) by western blots and fluorescence microscopy, the proliferation rate of GD cells, and scratch-induced wound healing activity. Our results show that catechin reduces the expression level of GRP78/BiP, leads to cell proliferation rates of GD cells similar levels to normal cells, and improves wound healing activity. We conclude that catechin protects against ER stress in GD cells and catechin-mediated reductions in ER stress may be associated with enhanced cell survival.
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Affiliation(s)
- Yea-Jin Lee
- Department of Biotechnology, Hoseo University, Baebang, Asan, Chungnam, 336-795, Republic of Korea
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Chobot V, Drage S, Hadacek F. Redox Properties of 8-Quinolinol and Implications for its Mode of Action. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600505] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
8-Quinolinol (oxine, 8-hydroxyquinoline) is a simple aromatic alkaloid with allelopathic, antibacterial, antifungal, and cytotoxic activities. Generally, it is assumed that 8-quinolinol toxicity depends on transition metal chelation that negatively affects their availability for metalloenzymes in the cell or reactive oxygen species generation (ROS), which are formed following reduction of molecular oxygen by autoxidation of the redox active metal central atom of the 8-quinolinol complex. On the contrary, beneficial effects of 8-quinolinol and its derivatives in the medication of certain degenerative diseases are known. In this context, the activity of 8-quinolinol derivatives is attributed to their antioxidant activity following iron complex formation. To address this controversial issue, we explore the possible anti- or pro-oxidant effects of 8-quinolinol and its iron complexes in the deoxyribose degradation assay, by cyclic voltammetry and in a biological assay. The antibacterial effects of 8-quinolinol and its complex with iron were evaluated on Curtobacterium flaccumfacies and Paenibacillus amylolyticus. 8-Quinolinol showed strong antioxidant activity in the deoxyribose degradation assay. This activity may not depend exclusively on iron chelation, but probably more on the notable reducing properties of 8-quinolinol; it proved to be a more efficient antioxidant than the flavonoids catechin and quercetin. By contrast, 8-quinolinol showed no pro-oxidative effects in the deoxyribose degradation assay, both in free form and in complex with iron, as it may occur with redox cyclers. Cyclic voltammetry confirmed this too. 8-Quinolinol significantly inhibited bacterial growth and respiration. Idiosyncratically, its 50:1 mixture with iron(III) ions was less active compared with free 8-quinolinol; it even caused a U-shaped nonlinear hormetic effect on growth and failed to inhibit respiration as totally as the pure mixture; the respiration was even accelerated compared with the control as a result of lower stress. Our results support the notion that complex formation with either iron or other transition metals affects the reducing power of 8-quinolinol, but, in contrast to general assumptions, this study finds no support that complex formation with iron represents the major mode of action.
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Affiliation(s)
- Vladimir Chobot
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | - Sigrid Drage
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | - Franz Hadacek
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
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Biogeographic differences in the effects of Centaurea stoebe on the soil nitrogen cycle: novel weapons and soil microbes. Biol Invasions 2010. [DOI: 10.1007/s10530-010-9902-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Knochel DG, Seastedt TR. Reconciling contradictory findings of herbivore impacts on spotted knapweed (Centaurea stoebe) growth and reproduction. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2010; 20:1903-1912. [PMID: 21049878 DOI: 10.1890/09-1944.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Substantial controversy surrounds the efficacy of biological control insects to reduce densities of Centaurea stoebe, a widespread, aggressive invasive plant in North America. We developed a graphical model to conceptualize the conditions required to explain the current contradictory findings, and then employed a series of manipulations to evaluate C. stoebe responses to herbivores. We manipulated soil nitrogen and competition in a field population and measured attack rates of a foliage and seed feeder (Larinus minutus), two gall flies (Urophora spp.), and a root feeder (Cyphocleonus achates), as well as their effects on the growth and reproduction of C. stoebe. Nitrogen limitation and competing vegetation greatly reduced C. stoebe growth. L. minutus most intensively reduced seed production in low-nitrogen soils, and removal of neighboring vegetation increased Larinus numbers per flower head and the percentage of flowers attacked by 15% and 11%, respectively. Cyphocleonus reduced flower production and aboveground biomass over two years, regardless of resources or competition. Our results, in conjunction with other published studies, demonstrate that positive, neutral, and negative plant growth responses to herbivory can be generated. However, under realistic field conditions and in the presence of multiple herbivores, our work repudiates earlier studies that indicate insect herbivores increase C. stoebe dominance.
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Affiliation(s)
- David G Knochel
- Department of Ecology and Evolutionary Biology, Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309, USA.
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Bajpai D, Rajeswari MS. Interaction of 8-hydroxyquinoline with soil environment mediates its ecological function. PLoS One 2010; 5:e12852. [PMID: 20877629 PMCID: PMC2943481 DOI: 10.1371/journal.pone.0012852] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Accepted: 08/20/2010] [Indexed: 11/24/2022] Open
Abstract
Background Allelopathic functions of plant-released chemicals are often studied through growth bioassays assuming that these chemicals will directly impact plant growth. This overlooks the role of soil factors in mediating allelopathic activities of chemicals, particularly non-volatiles. Here we examined the allelopathic potential of 8-hydroxyquinoline (HQ), a chemical reported to be exuded from the roots of Centaurea diffusa. Methodology/Principal Findings Growth bioassays and HQ recovery experiments were performed in HQ-treated soils (non-sterile, sterile, organic matter-enriched and glucose-amended) and untreated control soil. Root growth of either Brassica campestris or Phalaris minor was not affected in HQ-treated non-sterile soil. Soil modifications (organic matter and glucose amendments) could not enhance the recovery of HQ in soil, which further supports the observation that HQ is not likely to be an allelopathic compound. Hydroxyquinoline-treated soil had lower values for the CO2 release compared to untreated non-sterile soil. Soil sterilization significantly influenced the organic matter content, PO4-P and total organic nitrogen levels. Conclusion/Significance Here, we concluded that evaluation of the effect of a chemical on plant growth is not enough in evaluating the ecological role of a chemical in plant-plant interactions. Interaction of the chemical with soil factors largely determines the impact of HQ on plant growth.
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Hadacek F, Bachmann G, Engelmeier D, Chobot V. Hormesis and a Chemical Raison D'être for Secondary Plant Metabolites. Dose Response 2010; 9:79-116. [PMID: 21431080 PMCID: PMC3057638 DOI: 10.2203/dose-response.09-028.hadacek] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
In plants, accumulation in specific compartments and huge structural diversity of secondary metabolites is one trait that is not understood yet. By exploring the diverse abiotic and biotic interactions of plants above- and belowground, we provide examples that are characterized by nonlinear effects of the secondary metabolites. We propose that redox chemistry, specifically the reduction of reactive oxygen species (ROS) and, in their absence, reduction of molecular oxygen by the identical secondary metabolite, is an important component of the hormetic effects caused by these compounds. This is illustrated for selected phenols, terpenoids, and alkaloids. The redox reactions are modulated by the variable availability of transition metals that serve as donors of electrons in a Fenton reaction mode. Low levels of ROS stimulate growth, cell differentiation, and stress resistance; high levels induce programmed cell death. We propose that provision of molecules that can participate in this redox chemistry is the raison d'être for secondary metabolites. In this context, the presence or absence of functional groups in the molecule is more essential than the whole structure. Accordingly, there exist no constraints that limit structural diversity. Redox chemistry is ubiquitous, from the atmosphere to the soil.
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Affiliation(s)
- Franz Hadacek
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Austria
| | - Gert Bachmann
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Austria
| | - Doris Engelmeier
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Austria
| | - Vladimir Chobot
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Austria
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Yang CQ, Sun PY, Ding DZ, Moriuchi H, Ishitsuka Y, Irikura M, Irie T. The Ethical Kampo Formulation Sho-Seiryu-To (TJ-19) Prevents Bleomycin-Induced Pulmonary Fibrosis in Rats. Biol Pharm Bull 2010; 33:1438-42. [DOI: 10.1248/bpb.33.1438] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Chang-qing Yang
- Department of Pharmaceutical Sciences, College of Pharmacy, Yanbian University
| | - Peng-yuan Sun
- Department of Pharmaceutical Sciences, College of Pharmacy, Yanbian University
| | - Da-zhi Ding
- Department of Cardiology, Affiliated Hospital of Yanbian University
| | - Hiroshi Moriuchi
- Laboratory of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Sojo University
| | - Yoichi Ishitsuka
- Department of Clinical Chemistry and Informatics, Graduate School of Pharmaceutical Sciences, Kumamoto University
| | - Mitsuru Irikura
- Department of Clinical Chemistry and Informatics, Graduate School of Pharmaceutical Sciences, Kumamoto University
| | - Tetsumi Irie
- Department of Clinical Chemistry and Informatics, Graduate School of Pharmaceutical Sciences, Kumamoto University
- Center for Clinical Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Kumamoto University
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Chobot V, Hadacek F. Iron and its complexation by phenolic cellular metabolites: from oxidative stress to chemical weapons. PLANT SIGNALING & BEHAVIOR 2010; 5:4-8. [PMID: 20592800 PMCID: PMC2835949 DOI: 10.4161/psb.5.1.10197] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2009] [Accepted: 09/28/2009] [Indexed: 05/20/2023]
Abstract
Iron is a transition metal that forms chelates and complexes with various organic compounds, also with phenolic plant secondary metabolites. The ligands of iron affect the redox potential of iron. Electrons may be transferred either to hydroxyl radicals, hydrogen peroxide or molecular oxygen. In the first case, oxidative stress is decreased, in the latter two cases, oxidative stress is increased. This milieu-dependent mode of action may explain the non-linear mode of action of juglone and other secondary metabolites. Attention to this phenomenon may help to explain idiosyncratic and often nonlinear effects that result in biological assays. Current chemical assays are discussed that help to explore these aspects of redox chemistry.
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Affiliation(s)
- Vladimir Chobot
- Department of Chemical Ecology and Ecosystem Research, Faculty of Life Sciences, University of Vienna, Vienna, Austria
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