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Yang C, Wu P, Cao Y, Yang B, Liu L, Chen J, Zhuo R, Yao X. Overexpression of dihydroflavonol 4-reductase ( CoDFR) boosts flavonoid production involved in the anthracnose resistance. FRONTIERS IN PLANT SCIENCE 2022; 13:1038467. [PMID: 36438122 PMCID: PMC9682034 DOI: 10.3389/fpls.2022.1038467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
The outbreak of anthracnose caused by Colletotrichum spp. represents a devastating epidemic that severely affects oil tea (Camellia oleifera) production in China. However, the unknown resistance mechanism to anthracnose in C. oleifera has impeded the progress of breeding disease-resistant varieties. In this study, we investigated the physiological responses of resistant and susceptible lines during C. gloeosporioides infection. Our results showed that the accumulation of malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD) in both disease-resistant and susceptible lines increased by C. gloeosporioides infection. Also, disease-resistant lines exhibited lower MDA, but higher POD, SOD, and CAT activities compared to susceptible lines. The accumulation of flavonoids in both resistant and susceptible C. oleifera leaves increased following C. gloeosporioides infection, and the increase was greater in resistant lines. Further, we identified and functionally characterized the dihydroflavonol 4-reductase (CoDFR) from the resistant C. oleifera line. We showed that the full-length coding sequence (CDS) of CoDFR is 1044 bp encoding 347 amino acids. The overexpression of CoDFR in tobacco altered the expression of flavonoid biosynthetic genes, resulting in an increased flavonoid content in leaves. CoDFR transgenic tobacco plants exhibited increased anthracnose resistance. Furthermore, the transgenic plants had higher salicylic acid content. These findings offer potential insights into the pivotal role of CoDFR involved in flavonoid-mediated defense mechanisms during anthracnose invasion in resistant C. oleifera.
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Affiliation(s)
| | | | | | | | | | | | | | - Xiaohua Yao
- *Correspondence: Renying Zhuo, ; Xiaohua Yao,
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Bioprospecting of an Endolichenic Fungus Phanerochaete sordida Isolated from Mangrove-Associated Lichen Bactrospora myriadea. J CHEM-NY 2022. [DOI: 10.1155/2022/3193689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Bioassay-guided fractionation of the ethyl acetate extract of Phanerochaete sordida, an endolichenic fungus (ELF) isolated from the host lichen Bactrospora myriadea, collected from Negombo lagoon, Sri Lanka, led to the isolation of a bioactive compound. Following the identification of the fungus using morphological and DNA barcoding techniques, the pure compound was isolated using column chromatography, preparative TLC, and semipreparative HPLC. The structure elucidation was carried out using IR, HR-ESI-MS and 1H, 13C & 2D NMR spectroscopic methods. The in vitro bioassays conducted revealed that compound 1 has a high antioxidant activity with ABTS•+ (IC50
), moderate anti-inflammatory activity (IC50
), comparable antibacterial activity against the oral-bacterial strain Streptococcus mutans (MIC 898.79 μM and MLC 1797.58 μM), moderate tyrosinase inhibition (IC50
), and moderate cytotoxicity against oral cancer (IC50
), in comparison with respective positive controls. The in silico experiments conducted for tyrosinase inhibition and cytotoxicity using Schrödinger revealed results in line with the in vitro results, thus confirming the bioactivities. The molecule also satisfies the key features of drug likeliness according to pharmacokinetic studies.
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Yang C, Wu P, Yao X, Sheng Y, Zhang C, Lin P, Wang K. Integrated Transcriptome and Metabolome Analysis Reveals Key Metabolites Involved in Camellia oleifera Defense against Anthracnose. Int J Mol Sci 2022; 23:536. [PMID: 35008957 PMCID: PMC8745097 DOI: 10.3390/ijms23010536] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/19/2021] [Accepted: 12/31/2021] [Indexed: 02/04/2023] Open
Abstract
Camellia oleifera (Ca. oleifera) is a woody tree species cultivated for the production of edible oil from its seed. The growth and yield of tea-oil trees are severely affected by anthracnose (caused by Colletotrichum gloeosporioides). In this study, the transcriptomic and metabolomic analyses were performed to detect the key transcripts and metabolites associated with differences in the susceptibility between anthracnose-resistant (ChangLin150) and susceptible (ChangLin102) varieties of Ca. oleifera. In total, 5001 differentially expressed genes (DEGs) were obtained, of which 479 DEGs were common between the susceptible and resistant varieties and further analyzed. KEGG enrichment analysis showed that these DEGs were significantly enriched in tyrosine metabolism, phenylpropanoid biosynthesis, flavonoid biosynthesis and isoquinoline alkaloid biosynthesis pathways. Furthermore, 68 differentially accumulated metabolites (DAMs) were detected, including flavonoids, such as epicatechin, phenethyl caffeate and procyanidin B2. Comparison of the DEGs and DAMs revealed that epicatechin, procyanidin B2 and arachidonic acid (peroxide free) are potentially important. The expression patterns of genes involved in flavonoid biosynthesis were confirmed by qRT-PCR. These results suggested that flavonoid biosynthesis might play an important role in the fight against anthracnose. This study provides valuable molecular information about the response of Ca. oleifera to Co. gloeosporioides infection and will aid the selection of resistant varieties using marker-assisted breeding.
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Affiliation(s)
| | | | - Xiaohua Yao
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China; (C.Y.); (P.W.); (Y.S.); (C.Z.); (P.L.); (K.W.)
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Désiré S, Ernestine N, Bruno TB, Lazare SS, Ulrich DD, Lateef M, Schneider B, Ali MS, Barthélemy N. A new dammarane type triterpene glucoside from the aerial parts of Gouania longipetala (Rhamnaceae). Nat Prod Res 2021; 35:3192-3203. [PMID: 31782674 DOI: 10.1080/14786419.2019.1690483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 10/31/2019] [Accepted: 11/03/2019] [Indexed: 10/25/2022]
Abstract
3-O-β-D-glucopyranosyl gouanogenin A (1), a new naturally occurring dammarane class of triterpene glucoside, has been isolated from the aerial parts of Gouania longipetala along with six known secondary metabolites 2-7. Their structure was elucidated through spectroscopic data including 1 D- and 2 D-NMR. The compounds 1 and 6 showed significant antioxidant potential in DPPH radical scavenging assay. On the other hand, the compound 4 revealed potent inhibitory potential against the enzyme urease, while 1 and 3 were significantly active.
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Affiliation(s)
- Soh Désiré
- Department of Chemistry, Higher Teacher Training College, TWAS Research Unit (TRU), University of Bamenda, Bamenda, Cameroon
- Laboratory of Medicinal Chemistry & Pharmacognosy, Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences (ICCBS), University of Karachi, Karachi, Pakistan
| | - Nkwengoua Ernestine
- Laboratory of Medicinal Chemistry & Pharmacognosy, Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Tchebemou Bakang Bruno
- Laboratory of Medicinal Chemistry & Pharmacognosy, Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Sidjui Sidjui Lazare
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences (ICCBS), University of Karachi, Karachi, Pakistan
- Faculty of Sciences, Department of Organic Chemistry, Institute of Medical Research and Medicinal Plant Studies, TWAS Research Unit (TRU), University of Yaounde I, Yaoundé, Cameroon
| | - Dzo Defokou Ulrich
- Laboratory of Medicinal Chemistry & Pharmacognosy, Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Mehreen Lateef
- Multidisciplinary Research Lab, Bahria University Medical and Dental College, Karachi, Pakistan
| | | | - Muhammad Shaiq Ali
- H. E. J. Research Institute of Chemistry, International Center for Chemical & Biological Sciences (ICCBS), University of Karachi, Karachi, Pakistan
| | - Nyassé Barthélemy
- Laboratory of Medicinal Chemistry & Pharmacognosy, Faculty of Science, Department of Organic Chemistry, University of Yaoundé I, Yaoundé, Cameroon
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Shang XF, Xiao L, Su JT, Wei SY, Wang YS, Yang JH. Chemical Constituents of Litsea euosma. Chem Nat Compd 2019. [DOI: 10.1007/s10600-019-02914-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Olugbodi JO, Tincho MB, Oguntibeju OO, Olaleye MT, Akinmoladun AC. Glyphaea brevis - In vitro antioxidant and in silico biological activity of major constituents and molecular docking analyses. Toxicol In Vitro 2019; 59:187-196. [PMID: 30998971 DOI: 10.1016/j.tiv.2019.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 04/12/2019] [Accepted: 04/12/2019] [Indexed: 11/26/2022]
Abstract
Previous studies have revealed that leaf extracts of Glyphaea brevis possess antioxidant activity but the bioactivity and mechanisms of action of its major constituents remain unknown. This study evaluated in vitro antioxidant and free radical scavenging activities of Glyphaea brevis twigs and leaves, and probable toxicity profile, pharmacological activities and mechanisms of action of major phytoconstituents in silico. Phytochemical screening detected saponins, tannins, steroids, anthraquinones, flavonoids, terpenoids and phenolics in the extracts. HPLC fingerprinting revealed major compounds as ferulic, catechuic and coumaric acids. Twig extract contained more flavanols compared to the leaf extract while the leaf extract had more flavonol content. Extract of the twigs demonstrated higher ORAC, TEAC and FRAP compared to the leaf extract. In silico analyses predicted low acute toxicity risk and pharmacological activities which are in agreement with traditional use of the plant in the management of diseases such as dyspepsia, ulcers, chest pains, diarrhea, dysentery and sleeping sickness. The molecular docking studies revealed that coumaric acid and ferulic acid have the best binding for all proteins tested. In summary, Glyphaea brevis twigs possess higher antioxidant activity than the leaves and major constituents showed low toxicological potential and promising biological activities which support its ethnomedical use.
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Affiliation(s)
- Janet Olayemi Olugbodi
- Phytomedicine, Biochemical Pharmacology and Toxicology Laboratories, Department of Biochemistry, School of Sciences, PMB 704, The Federal University of Technology, Akure, Nigeria; Department of Biochemistry, Bingham University, PMB 005, Karu, Nasarawa State, Nigeria.
| | - Marius Belmondo Tincho
- Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
| | - Oluwafemi O Oguntibeju
- Phytomedicine and Phytochemistry Group, Oxidative Stress Research Centre, Department of Biomedical Sciences, Faculty of Health & Wellness Sciences, Cape Peninsula University of Technology, P.O. Box1906, Bellville Campus, Bellville 7535, South Africa
| | - Mary Tolulope Olaleye
- Phytomedicine, Biochemical Pharmacology and Toxicology Laboratories, Department of Biochemistry, School of Sciences, PMB 704, The Federal University of Technology, Akure, Nigeria
| | - Afolabi Clement Akinmoladun
- Phytomedicine, Biochemical Pharmacology and Toxicology Laboratories, Department of Biochemistry, School of Sciences, PMB 704, The Federal University of Technology, Akure, Nigeria
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Pillai G, Chibale K, Constable EC, Keller AN, Gutierrez MM, Mirza F, Sengstag C, Masimirembwa C, Denti P, Maartens G, Ramsay M, Ogutu B, Makonnen E, Gordon R, Ferreira CG, Goldbaum FA, Degrave WMS, Spector J, Tadmor B, Kaiser HJ. The Next Generation Scientist program: capacity-building for future scientific leaders in low- and middle-income countries. BMC MEDICAL EDUCATION 2018; 18:233. [PMID: 30305069 PMCID: PMC6180641 DOI: 10.1186/s12909-018-1331-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 09/21/2018] [Indexed: 05/08/2023]
Abstract
BACKGROUND Scientific and professional development opportunities for early career scientists in low- and middle- income countries (LMICs) are limited and not consistent. There is a disproportionately low number of biomedical and clinical researchers in LMIC's relative to their high burden of disease, a disparity that is aggravated by emigration of up to 70% of scientists from their countries of birth for education and employment elsewhere. To help address this need, a novel University-accredited, immersive fellowship program was established by a large public-academic-private network. We sought to describe the program and summarize progress and lessons learned over its first 7-years. METHODS Hallmarks of the program are a structured learning curriculum and bespoke research activities tailored to the needs of each fellow. Research projects expose the scientists to state-of-the-art methodologies and leading experts in their fields while also ensuring that learnings are implementable within their home infrastructure. Fellows run seminars on drug discovery and development that reinforce themes of scientific leadership and teamwork together with practical modules on addressing healthcare challenges within their local systems. Industry mentors achieve mutual learning to better understand healthcare needs in traditionally underserved settings. We evaluated the impact of the program through an online survey of participants and by assessing research output. RESULTS More than 140 scientists and clinicians from 25 countries participated over the 7-year period. Evaluation revealed strong evidence of knowledge and skills transfer, and beneficial self-reported impact on fellow's research output and career trajectories. Examples of program impact included completion of post-graduate qualifications; establishment and implementation of good laboratory- and clinical- practice mechanisms; and becoming lead investigators in local programs. There was a high retention of fellows in their home countries (> 75%) and an enduring professional network among the fellows and their mentors. CONCLUSIONS Our experience demonstrates an example for how multi-sectoral partners can contribute to scientific and professional development of researchers in LMICs and supports the idea that capacity-building efforts should be tailored to the specific needs of beneficiaries to be maximally effective. Lessons learned may be applied to the design and conduct of other programs to strengthen science ecosystems in LMICs.
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Affiliation(s)
- Goonaseelan Pillai
- CP+ Associates GmbH, Basel, Switzerland
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Kelly Chibale
- Drug Discovery and Development Centre (H3D), South African Medical Research Council Drug Discovery and Development Research Unit and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | | | | | | | | | | | | | - Paolo Denti
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Gary Maartens
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Michèle Ramsay
- Sydney Brenner Institute for Molecular Bioscience and Division of Human Genetics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Bernhards Ogutu
- University of Strathmore and Kenya Medical Research Institute, Nairobi, Kenya
| | - Eyasu Makonnen
- Center For Innovative Drug Development and Therapeutic Trials for Africa, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Gossan DPA, Alabdul Magid A, Yao-Kouassi PA, Ahibo Coffy A, Josse J, Gangloff SC, Morjani H, Voutquenne-Nazabadioko L. Triterpene glycosides from the aerial parts of Gouania longipetala. PHYTOCHEMISTRY 2017; 134:71-77. [PMID: 27865442 DOI: 10.1016/j.phytochem.2016.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/07/2016] [Accepted: 11/11/2016] [Indexed: 06/06/2023]
Abstract
Six previously undescribed triterpenoid saponins, gouaniaside I-VI, were isolated from the aerial parts of Gouania longipetala Hemsl. (Rhamnaceae), in addition to four known triterpenes. The structure elucidation of these compounds was based on analyses of spectroscopic data including 1D- and 2D-NMR and HR-ESI-MS techniques. The inhibitory activity of isolated compounds against promyelocytic leukemia HL60 and human erythromyeloblastoid leukemia K562 cell lines was evaluated and jujuboside I exhibited moderate cytotoxicity, with IC50 values of 13.5 and 21.0 μM, respectively. Among the isolated triterpenes, alphitolic acid exhibited moderate antibacterial activity against Staphylococcus aureus, Enterococcus faecalis and Escherichia coli (MICs 32, 64 and 128 μg/mL, respectively).
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Affiliation(s)
- Diane Patricia Apie Gossan
- ICMR-UMR CNRS 7312, Groupe Isolement et Structure, Campus Sciences, Bât. 18, BP 1039, 51687 Reims, France; Laboratoire de Chimie Organique et de Substances Naturelles, Université Félix-Houphouët Boigny d'Abidjan-Cocody, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Abdulmagid Alabdul Magid
- ICMR-UMR CNRS 7312, Groupe Isolement et Structure, Campus Sciences, Bât. 18, BP 1039, 51687 Reims, France.
| | - Philomène Akoua Yao-Kouassi
- Laboratoire de Chimie Organique et de Substances Naturelles, Université Félix-Houphouët Boigny d'Abidjan-Cocody, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Antoine Ahibo Coffy
- Laboratoire de Chimie Organique et de Substances Naturelles, Université Félix-Houphouët Boigny d'Abidjan-Cocody, 22 BP 582 Abidjan 22, Cote d'Ivoire
| | - Jérome Josse
- EA 4691, «Biomatériaux et inflammation en site osseux», Laboratoire de microbiologie, UFR de pharmacie, 1, rue du Maréchal-Juin, 51096 Reims, France
| | - Sophie C Gangloff
- EA 4691, «Biomatériaux et inflammation en site osseux», Laboratoire de microbiologie, UFR de pharmacie, 1, rue du Maréchal-Juin, 51096 Reims, France
| | - Hamid Morjani
- MEDyC UMR CNRS 7369, URCA, Faculté de Pharmacie, SFR CAP Santé, 1, rue du Maréchal-Juin, 51096 Reims, France
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