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Al-Khdhairawi AAQ, Loo JSE, Abd Mutalib N, Abd Latip N, Manshoor N, Abu Bakar H, Babu Shivanagere Nagojappa N, Weber JF. Diketopiperazine and isoindolinone alkaloids from the endophytic fungus Aspergillus sp. HAB10R12. PHYTOCHEMISTRY 2023; 211:113685. [PMID: 37088350 DOI: 10.1016/j.phytochem.2023.113685] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 03/31/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Four previously undescribed alkaloids, aspergillinine A-D, and four known diterpene pyrones were isolated from the potato dextrose agar (PDA) culture of Aspergillus sp. HAB10R12. The chemical structures of the isolated compounds were elucidated based on a detailed analysis of their NMR and MS data. The absolute configuration of the isolated compounds was determined by Electronic Circular Dichroism analysis coupled with computational methods. Aspergillinine A represents the first example of a diketopiperazine dipeptide containing the unnatural amino acid N-methyl kynurenine. Its absolute configuration revealed that it adopts a rather unusual conformation. Aspergillinine B represents a previously unencountered skeleton containing an isoindolinone ring. Aspergillinine C and D were similar to previously isolated diketopiperazine alkaloids, namely, lumpidin and brevianamide F, respectively. The diterpene pyrones were isolated twice previously, once from a soil-derived Aspergillus species, and once from the liquid culture of Aspergillus sp. HAB10R12. The alkaloids isolated in this study showed no antiproliferative activity when tested against HepG2 and A549 cancer cell lines.
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Affiliation(s)
- Amjad Ayad Qatran Al-Khdhairawi
- School of Pharmacy, Faculty of Health & Medical Sciences, Taylor's University Lakeside Campus, 47500, Subang Jaya, Selangor, Malaysia; Organic Synthesis Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281-S4, Ghent, 9000, Belgium.
| | - Jason Siau Ee Loo
- School of Pharmacy, Faculty of Health & Medical Sciences, Taylor's University Lakeside Campus, 47500, Subang Jaya, Selangor, Malaysia; Centre for Drug Discovery and Molecular Pharmacology, Faculty of Health & Medical Sciences, Taylor's University, No. 1, Jalan Taylors, 47500, Subang Jaya, Selangor, Malaysia
| | - Nurliana Abd Mutalib
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA (UiTM), 42300, Selangor, Malaysia
| | - Normala Abd Latip
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA (UiTM), 42300, Selangor, Malaysia
| | - Nurhuda Manshoor
- Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA (UiTM), 42300, Selangor, Malaysia
| | - Hamidah Abu Bakar
- PICOMS International University College, 68100, Kuala Lumpur, Malaysia; Faculty of Health Sciences, Universiti Selangor, 40000, Selangor, Malaysia
| | | | - Jean-Frédéric Weber
- UFR Sciences Pharmaceutiques and INRAE, Bordeaux INP, UR OENOLOGIE, EA 4577, USC, 1366, ISVV, Univ. Bordeaux, 210 Chemin de Leysotte, Villenave d'Ornon, 33882, France
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Akone SH, Wang H, Misse Mouelle EN, Mándi A, Kurtán T, Koliye PR, Hartmann R, Bhatia S, Yang J, Müller WEG, Lai D, Kalscheuer R, Proksch P. Prenylated cyclohexene-type meroterpenoids and sulfur-containing xanthones produced by Pseudopestalotiopsis theae. PHYTOCHEMISTRY 2022; 197:113124. [PMID: 35144154 DOI: 10.1016/j.phytochem.2022.113124] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 01/30/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Chemical investigation of the fungal endophyte Pseudopestalotiopsis theae isolated from leaves of Caloncoba welwitschii, collected in Cameroon, resulted in two previously undescribed sulfur-containing xanthone derivatives sydoxanthones D and E, in addition to three previously undescribed monomeric diisoprenyl-cyclohexene-type meroterpenoids biscognienynes D-F and five known natural products. The structures of the undescribed compounds were unambiguously identified by their mass spectra and by extensive 1D and 2D NMR spectroscopic analysis. Mosher's reaction was performed to determine the absolute configuration of sydoxanthones D and E while TDDFT-ECD calculations were used to assign the configuration of biscognienyne D. Biscognienynes B and D showed significant cytotoxicity against the mouse lymphoma cell line L5178Y with IC50 values of 7.7 and 6.7 μM and against the human leukemic cell lines HL60, and Hal-01 with IC50 values ranging from 4.3 to 12.1 μM.
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Affiliation(s)
- Sergi Herve Akone
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University, Universitaetsstrasse 1, Geb. 26.23, Duesseldorf, 40225, Germany; Department of Chemistry, Faculty of Science, University of Douala, Douala, P.O. Box 24157, Cameroon; Department of Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research and Department of Pharmacy, Saarland University, Saarbrücken, 66123, Germany.
| | - Hao Wang
- Hainan Key Laboratory for Research and Development of Natural Products from Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, No. 4 Xueyuan Road, Haikou, 571101, Hainan, China
| | - Eitel Ngoh Misse Mouelle
- Department of Chemistry, Faculty of Science, University of Douala, Douala, P.O. Box 24157, Cameroon
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen, Egyetem Tér 1, P.O. Box. 400, 4002, Debrecen, Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, Egyetem Tér 1, P.O. Box. 400, 4002, Debrecen, Hungary
| | - Pierre Roger Koliye
- Department of Chemistry, Faculty of Science, University of Douala, Douala, P.O. Box 24157, Cameroon
| | - Rudolf Hartmann
- Institute of Complex Systems: Strukturbiochemie (ICS-6), Forschungszentrum Julich, Wilhelm-Johnen-Strase, 52428, Julich, Germany
| | - Sanil Bhatia
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich-Heine University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - Jing Yang
- Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich-Heine University Duesseldorf, Medical Faculty, Duesseldorf, Germany
| | - Werner E G Müller
- Institute of Physiological Chemistry, Universitatsmedizin der Johannes Gutenberg-Universitat Mainz, 55128, Mainz, Germany
| | - Daowan Lai
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing, 100193, China
| | - Rainer Kalscheuer
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University, Universitaetsstrasse 1, Geb. 26.23, Duesseldorf, 40225, Germany
| | - Peter Proksch
- Institute of Pharmaceutical Biology and Biotechnology, Heinrich-Heine-University, Universitaetsstrasse 1, Geb. 26.23, Duesseldorf, 40225, Germany.
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Kaur M, Chadha P, Kaur S, Kaur A, Kaur R. Schizophyllum commune induced oxidative stress and immunosuppressive activity in Spodoptera litura. BMC Microbiol 2020; 20:139. [PMID: 32471364 PMCID: PMC7260734 DOI: 10.1186/s12866-020-01831-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 05/25/2020] [Indexed: 01/24/2023] Open
Abstract
Background In the last few decades, considerable attention has been paid to fungal endophytes as biocontrol agents, however little is known about their mode of action. This study aimed to investigate the toxic effects of an endophytic fungus Schizophyllum commune by analyzing activities of antioxidant and detoxifying enzymes as well as morphology of haemocytes using Spodoptera litura as a model. Results Ethyl acetate extract of S. commune was fed to the larvae of S. litura using the artificial diet having 276.54 μg/ml (LC50 of fungus) concentration for different time durations. Exposed groups revealed significant (p ≤ 0.05) increase in the activities of various enzymes viz. Catalase, Ascorbate peroxidase, Superoxide dismutase, Glutathione-S-Transferase. Furthermore, haemocytes showed various deformities like breakage in the cell membrane, cytoplasmic leakage and appearance of strumae in the treated larvae. A drastic reduction in the percentage of normal haemocytes was recorded in the treated groups with respect to control. Conclusion The study provides important information regarding the oxidative stress causing and immunosuppressant potential of S. commune against S. litura and its considerable potential for incorporation in pest management programs.
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Affiliation(s)
- Mandeep Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Pooja Chadha
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab, India.
| | - Sanehdeep Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Amarjeet Kaur
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Rajvir Kaur
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab, India
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Lin W, Kuang Y, Wang J, Duan D, Xu W, Tian P, Nzabanita C, Wang M, Li M, Ma B. Effects of Seasonal Variation on the Alkaloids of Different Ecotypes of Epichloë Endophyte- Festuca sinensis Associations. Front Microbiol 2019; 10:1695. [PMID: 31402903 PMCID: PMC6671874 DOI: 10.3389/fmicb.2019.01695] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 07/09/2019] [Indexed: 11/23/2022] Open
Abstract
The Epichloë endophyte-Festuca sinensis association produces alkaloids which can protect the host plant from biotic and abiotic stresses. Alkaloid concentrations depend on the genetic predisposition of grass and endophyte, and are affected by the environment. Endophyte infected F. sinensis of six ecotypes were grown in experimental field and greenhouse for 2 years. Their aboveground plant tissues were collected each season to test for peramine, lolitrem B, and ergot concentrations. The results showed that seasonal changes affected the peramine, lolitrem B and ergot concentrations of Epichloë endophyte-F. sinensis associations; and these three different alkaloids responded differently to seasonal variation. The peramine concentration of six ecotypes of F. sinensis decreased significantly (p < 0.05) from spring to autumn. The lolitrem B concentration of F. sinensis was higher in autumn than in other seasons. Ergot concentrations of five ecotypes (41, 57, 84, 99, and 141) of F. sinensis peaked in the summer, and lowered in spring and autumn. In addition, the ecotype has insignificant effect (p > 0.05) on the peramine and lolitrem B concentrations of F. sinensis, but it has a significant impact (p < 0.05) on the ergot concentrations. We concluded that the seasonal variation and ecotypes can influence the alkaloids produced by the F. sinensis-endophyte associations, but the effects of seasonal conditions on the alkaloid concentrations are more pronounced than ecotypes.
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Affiliation(s)
- Weihu Lin
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Yu Kuang
- Agricultural and Rural Bureau of Liling City, Liling, China
| | - Jianjun Wang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Dongdong Duan
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Wenbo Xu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Pei Tian
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Clement Nzabanita
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Meining Wang
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Miaomiao Li
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
| | - Bihua Ma
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
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