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Ge Y, Ma Y, Zhou C, Zhang Z, Yin Q, Zhang X, Zhang Z, Wu B. Kueishanamides A and B from the Hydrothermal Vent Sediment Derived Streptomyces sp. WU20. Chem Biodivers 2023; 20:e202301345. [PMID: 37985414 DOI: 10.1002/cbdv.202301345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
Marine actinomycetes are known for their production of remarkable organic molecules, particularly those featuring polyoxygenated long-chain backbones. Determining the absolute configurations of these compounds remains a challenging task even today. In this study, we successfully established the planar structures and absolute configurations of two highly flexible amide alkaloids from Streptomyces sp. WU20: kueishanamides A (1) and B (2). These compounds possess a C13 linear backbone and each contains five stereogenic carbon centers. Our approach involved a combination of spectroscopic and computational methods, including J-based configurational analysis and VCD calculations, ensuring the unambiguous determination of their configurations. Kueishanamide A (1) and kueishanamide B (2) showed moderate antifungal activity against pathogenic fungus Crytococcus neoformans, with MIC values of 25 μg/mL each.
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Affiliation(s)
- Yichao Ge
- Ocean College, Zhejiang University, Zhoushan, 321000, China
- College of Pharmaceutical Sciences, The Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang University, Hangzhou, 310058, China
| | - Yihan Ma
- Ocean College, Zhejiang University, Zhoushan, 321000, China
| | - Chengzeng Zhou
- Ocean College, Zhejiang University, Zhoushan, 321000, China
| | - Zhixuan Zhang
- School of Physical Science, Ningbo University, Ningbo, 315210, China
| | - Qizhao Yin
- Ocean College, Zhejiang University, Zhoushan, 321000, China
| | - Xiaoqin Zhang
- Zhejiang Provincial Key Laboratory of Inheritance and Innovation of She Medicine, Lishui Hospital of Traditional Chinese Medicine, Lishui, 323000, China
| | - Zunjing Zhang
- Zhejiang Provincial Key Laboratory of Inheritance and Innovation of She Medicine, Lishui Hospital of Traditional Chinese Medicine, Lishui, 323000, China
| | - Bin Wu
- Ocean College, Zhejiang University, Zhoushan, 321000, China
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2
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Chen Y, He Y, Pang X, Zhou X, Liu Y, Yang B. Secondary Metabolites from the Coral-Derived Fungus Aspergillus austwickii SCSIO41227 with Pancreatic Lipase and Neuraminidase Inhibitory Activities. Mar Drugs 2023; 21:567. [PMID: 37999391 PMCID: PMC10672402 DOI: 10.3390/md21110567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 11/25/2023] Open
Abstract
The coral-derived fungus Aspergillus austwickii SCSIO41227 from Beibu Gulf yielded four previously uncharacterized compounds, namely asperpentenones B-E (1-4), along with twelve known compounds (5-16). Their structures were elucidated using HRESIMS and NMR (1H and 13C NMR, HSQC, HMBC), among which the stereo-structure of compounds 1-3 was determined by calculated ECD. Furthermore, compounds 1-16 were evaluated in terms of their enzyme (acetylcholinesterase (AChE), pancreatic lipase (PL), and neuraminidase (NA)) inhibitory activities. These bioassay results revealed that compounds 2 and 14 exerted noticeable NA inhibitory effects, with IC50 values of 31.28 and 73.64 μM, respectively. In addition, compound 3 exhibited a weak inhibitory effect against PL. Furthermore, these compounds showed the potential of inhibiting enzymes in silico docking analysis to demonstrate the interactions between compounds and proteins.
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Affiliation(s)
- Ying Chen
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (Y.C.); (Y.H.); (X.P.); (X.Z.)
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Yanchun He
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (Y.C.); (Y.H.); (X.P.); (X.Z.)
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Xiaoyan Pang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (Y.C.); (Y.H.); (X.P.); (X.Z.)
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (Y.C.); (Y.H.); (X.P.); (X.Z.)
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (Y.C.); (Y.H.); (X.P.); (X.Z.)
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Bin Yang
- CAS Key Laboratory of Tropical Marine Bio-Resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (Y.C.); (Y.H.); (X.P.); (X.Z.)
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
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Ibrahim SRM, Mohamed SGA, Alsaadi BH, Althubyani MM, Awari ZI, Hussein HGA, Aljohani AA, Albasri JF, Faraj SA, Mohamed GA. Secondary Metabolites, Biological Activities, and Industrial and Biotechnological Importance of Aspergillus sydowii. Mar Drugs 2023; 21:441. [PMID: 37623723 PMCID: PMC10455642 DOI: 10.3390/md21080441] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 07/29/2023] [Accepted: 08/02/2023] [Indexed: 08/26/2023] Open
Abstract
Marine-derived fungi are renowned as a source of astonishingly significant and synthetically appealing metabolites that are proven as new lead chemicals for chemical, pharmaceutical, and agricultural fields. Aspergillus sydowii is a saprotrophic, ubiquitous, and halophilic fungus that is commonly found in different marine ecosystems. This fungus can cause aspergillosis in sea fan corals leading to sea fan mortality with subsequent changes in coral community structure. Interestingly, A. sydowi is a prolific source of distinct and structurally varied metabolites such as alkaloids, xanthones, terpenes, anthraquinones, sterols, diphenyl ethers, pyrones, cyclopentenones, and polyketides with a range of bioactivities. A. sydowii has capacity to produce various enzymes with marked industrial and biotechnological potential, including α-amylases, lipases, xylanases, cellulases, keratinases, and tannases. Also, this fungus has the capacity for bioremediation as well as the biocatalysis of various chemical reactions. The current work aimed at focusing on the bright side of this fungus. In this review, published studies on isolated metabolites from A. sydowii, including their structures, biological functions, and biosynthesis, as well as the biotechnological and industrial significance of this fungus, were highlighted. More than 245 compounds were described in the current review with 134 references published within the period from 1975 to June 2023.
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Affiliation(s)
- Sabrin R. M. Ibrahim
- Preparatory Year Program, Department of Chemistry, Batterjee Medical College, Jeddah 21442, Saudi Arabia
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | | | - Baiaan H. Alsaadi
- Department of Clinical Service, Pharmaceutical Care Services, King Salman Medical City, MOH, Al Madinah Al Munawwarah 11176, Saudi Arabia; (B.H.A.); (M.M.A.)
| | - Maryam M. Althubyani
- Department of Clinical Service, Pharmaceutical Care Services, King Salman Medical City, MOH, Al Madinah Al Munawwarah 11176, Saudi Arabia; (B.H.A.); (M.M.A.)
| | - Zainab I. Awari
- Pharmaceutical Care Services, King Salman Medical City, MOH, Al Madinah Al Munawwarah 11176, Saudi Arabia;
| | - Hazem G. A. Hussein
- Preparatory Year Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia;
| | - Abrar A. Aljohani
- Pharmaceutical Care Services, Medina Cardiac Center, MOH, Al Madinah Al Munawwarah 11176, Saudi Arabia;
| | - Jumanah Faisal Albasri
- Pharmacy Department, Home Health Care, MOH, Al Madinah Al Munawwarah 11176, Saudi Arabia;
| | - Salha Atiah Faraj
- Pharmacy Department, King Salman Medical City, MOH, Almadinah Almunawarah 11176, Saudi Arabia;
| | - Gamal A. Mohamed
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
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Jiang JP, Liu X, Liao YF, Shan J, Zhu YP, Liu CH. Genomic insights into Aspergillus sydowii 29R-4-F02: unraveling adaptive mechanisms in subseafloor coal-bearing sediment environments. Front Microbiol 2023; 14:1216714. [PMID: 37455735 PMCID: PMC10339353 DOI: 10.3389/fmicb.2023.1216714] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 06/09/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction Aspergillussydowii is an important filamentous fungus that inhabits diverse environments. However, investigations on the biology and genetics of A. sydowii in subseafloor sediments remain limited. Methods Here, we performed de novo sequencing and assembly of the A. sydowii 29R-4-F02 genome, an isolate obtained from approximately 2.4 km deep, 20-million-year-old coal-bearing sediments beneath the seafloor by employing the Nanopore sequencing platform. Results and Discussion The generated genome was 37.19 Mb with GC content of 50.05%. The final assembly consisted of 11 contigs with N50 of 4.6 Mb, encoding 12,488 putative genes. Notably, the subseafloor strain 29R-4-F02 showed a higher number of carbohydrate-active enzymes (CAZymes) and distinct genes related to vesicular fusion and autophagy compared to the terrestrial strain CBS593.65. Furthermore, 257 positively selected genes, including those involved in DNA repair and CAZymes were identified in subseafloor strain 29R-4-F02. These findings suggest that A. sydowii possesses a unique genetic repertoire enabling its survival in the extreme subseafloor environments over tens of millions of years.
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Affiliation(s)
- Jun-Peng Jiang
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Xuan Liu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Yi-Fan Liao
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Jun Shan
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Yu-Ping Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Chang-Hong Liu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
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5
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Lauritano C, Galasso C. Microbial Interactions between Marine Microalgae and Fungi: From Chemical Ecology to Biotechnological Possible Applications. Mar Drugs 2023; 21:md21050310. [PMID: 37233504 DOI: 10.3390/md21050310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 05/27/2023] Open
Abstract
Chemical interactions have been shown to regulate several marine life processes, including selection of food sources, defense, behavior, predation, and mate recognition. These chemical communication signals have effects not only at the individual scale, but also at population and community levels. This review focuses on chemical interactions between marine fungi and microalgae, summarizing studies on compounds synthetized when they are cultured together. In the current study, we also highlight possible biotechnological outcomes of the synthetized metabolites, mainly for human health applications. In addition, we discuss applications for bio-flocculation and bioremediation. Finally, we point out the necessity of further investigating microalgae-fungi chemical interactions because it is a field still less explored compared to microalga-bacteria communication and, considering the promising results obtained until now, it is worthy of further research for scientific advancement in both ecology and biotechnology fields.
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Affiliation(s)
- Chiara Lauritano
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Via Acton n. 55, 80133 Naples, Italy
| | - Christian Galasso
- Department of Ecosustainable Marine Biotechnology, Calabria Marine Centre, Stazione Zoologica Anton Dohrn, C. da Torre Spaccata, 87071 Amendolara, Italy
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Rizos I, Debeljak P, Finet T, Klein D, Ayata SD, Not F, Bittner L. Beyond the limits of the unassigned protist microbiome: inferring large-scale spatio-temporal patterns of Syndiniales marine parasites. ISME COMMUNICATIONS 2023; 3:16. [PMID: 36854980 PMCID: PMC9975217 DOI: 10.1038/s43705-022-00203-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 03/02/2023]
Abstract
Marine protists are major components of the oceanic microbiome that remain largely unrepresented in culture collections and genomic reference databases. The exploration of this uncharted protist diversity in oceanic communities relies essentially on studying genetic markers from the environment as taxonomic barcodes. Here we report that across 6 large scale spatio-temporal planktonic surveys, half of the genetic barcodes remain taxonomically unassigned at the genus level, preventing a fine ecological understanding for numerous protist lineages. Among them, parasitic Syndiniales (Dinoflagellata) appear as the least described protist group. We have developed a computational workflow, integrating diverse 18S rDNA gene metabarcoding datasets, in order to infer large-scale ecological patterns at 100% similarity of the genetic marker, overcoming the limitation of taxonomic assignment. From a spatial perspective, we identified 2171 unassigned clusters, i.e., Syndiniales sequences with 100% similarity, exclusively shared between the Tropical/Subtropical Ocean and the Mediterranean Sea among all Syndiniales orders and 25 ubiquitous clusters shared within all the studied marine regions. From a temporal perspective, over 3 time-series, we highlighted 39 unassigned clusters that follow rhythmic patterns of recurrence and are the best indicators of parasite community's variation. These clusters withhold potential as ecosystem change indicators, mirroring their associated host community responses. Our results underline the importance of Syndiniales in structuring planktonic communities through space and time, raising questions regarding host-parasite association specificity and the trophic mode of persistent Syndiniales, while providing an innovative framework for prioritizing unassigned protist taxa for further description.
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Affiliation(s)
- Iris Rizos
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France.
- Sorbonne Université, CNRS, AD2M-UMR7144 Station Biologique de Roscoff, 29680, Roscoff, France.
| | - Pavla Debeljak
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
| | - Thomas Finet
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
| | - Dylan Klein
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
| | - Sakina-Dorothée Ayata
- Sorbonne Université, Laboratoire d'Océanographie et du Climat: Expérimentation et Analyses Numériques (LOCEAN, SU/CNRS/IRD/MNHN), 75252, Paris Cedex 05, France
| | - Fabrice Not
- Sorbonne Université, CNRS, AD2M-UMR7144 Station Biologique de Roscoff, 29680, Roscoff, France
| | - Lucie Bittner
- Institut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France
- Institut Universitaire de France, Paris, France
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7
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Berry O, Briand E, Bagot A, Chaigné M, Meslet-Cladière L, Wang J, Grovel O, Jansen JJ, Ruiz N, du Pont TR, Pouchus YF, Hess P, Bertrand S. Deciphering interactions between the marine dinoflagellate Prorocentrum lima and the fungus Aspergillus pseudoglaucus. Environ Microbiol 2023; 25:250-267. [PMID: 36333915 PMCID: PMC10100339 DOI: 10.1111/1462-2920.16271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 10/28/2022] [Indexed: 11/07/2022]
Abstract
The comprehension of microbial interactions is one of the key challenges in marine microbial ecology. This study focused on exploring chemical interactions between the toxic dinoflagellate Prorocentrum lima and a filamentous fungal species, Aspergillus pseudoglaucus, which has been isolated from the microalgal culture. Such interspecies interactions are expected to occur even though they were rarely studied. Here, a co-culture system was designed in a dedicated microscale marine-like condition. This system allowed to explore microalgal-fungal physical and metabolic interactions in presence and absence of the bacterial consortium. Microscopic observation showed an unusual physical contact between the fungal mycelium and dinoflagellate cells. To delineate specialized metabolome alterations during microalgal-fungal co-culture metabolomes were monitored by high-performance liquid chromatography coupled to high-resolution mass spectrometry. In-depth multivariate statistical analysis using dedicated approaches highlighted (1) the metabolic alterations associated with microalgal-fungal co-culture, and (2) the impact of associated bacteria in microalgal metabolome response to fungal interaction. Unfortunately, only a very low number of highlighted features were fully characterized. However, an up-regulation of the dinoflagellate toxins okadaic acid and dinophysistoxin 1 was observed during co-culture in supernatants. Such results highlight the importance to consider microalgal-fungal interactions in the study of parameters regulating toxin production.
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Affiliation(s)
- Olivier Berry
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
| | | | - Alizé Bagot
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
- IFREMER, PHYTOX, Nantes, France
| | - Maud Chaigné
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
- IFREMER, PHYTOX, Nantes, France
| | - Laurence Meslet-Cladière
- Univ Brest, INRAE, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, Plouzané, France
| | - Julien Wang
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
| | - Olivier Grovel
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
| | - Jeroen J Jansen
- Radboud University, Institute for Molecules and Materials, Nijmegen, The Netherlands
| | - Nicolas Ruiz
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
| | - Thibaut Robiou du Pont
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
| | - Yves François Pouchus
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
| | | | - Samuel Bertrand
- Institut des Substances et Organismes de la Mer, ISOMer, Nantes Université, UR 2160, Nantes, France
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Roik A, Reverter M, Pogoreutz C. A roadmap to understanding diversity and function of coral reef-associated fungi. FEMS Microbiol Rev 2022; 46:fuac028. [PMID: 35746877 PMCID: PMC9629503 DOI: 10.1093/femsre/fuac028] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 06/01/2022] [Accepted: 06/14/2022] [Indexed: 01/09/2023] Open
Abstract
Tropical coral reefs are hotspots of marine productivity, owing to the association of reef-building corals with endosymbiotic algae and metabolically diverse bacterial communities. However, the functional importance of fungi, well-known for their contribution to shaping terrestrial ecosystems and global nutrient cycles, remains underexplored on coral reefs. We here conceptualize how fungal functional traits may have facilitated the spread, diversification, and ecological adaptation of marine fungi on coral reefs. We propose that functions of reef-associated fungi may be diverse and go beyond their hitherto described roles of pathogens and bioeroders, including but not limited to reef-scale biogeochemical cycles and the structuring of coral-associated and environmental microbiomes via chemical mediation. Recent technological and conceptual advances will allow the elucidation of the physiological, ecological, and chemical contributions of understudied marine fungi to coral holobiont and reef ecosystem functioning and health and may help provide an outlook for reef management actions.
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Affiliation(s)
- Anna Roik
- Helmholtz Institute for Functional Marine Biodiversity, University of Oldenburg, Ammerländer Heerstraße 231, 26129 Oldenburg, Germany
- Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, 26046, Germany
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Am Handelshafen 12, 27570 Bremerhaven, Germany
| | - Miriam Reverter
- Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Wilhelmshaven, 26046, Germany
- School of Biological and Marine Sciences, University of Plymouth, Plymouth PL4 8AA, United Kingdom
| | - Claudia Pogoreutz
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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9
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Holt CC, Boscaro V, Van Steenkiste NWL, Herranz M, Mathur V, Irwin NAT, Buckholtz G, Leander BS, Keeling PJ. Microscopic marine invertebrates are reservoirs for cryptic and diverse protists and fungi. MICROBIOME 2022; 10:161. [PMID: 36180959 PMCID: PMC9523941 DOI: 10.1186/s40168-022-01363-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/02/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Microbial symbioses in marine invertebrates are commonplace. However, characterizations of invertebrate microbiomes are vastly outnumbered by those of vertebrates. Protists and fungi run the gamut of symbiosis, yet eukaryotic microbiome sequencing is rarely undertaken, with much of the focus on bacteria. To explore the importance of microscopic marine invertebrates as potential symbiont reservoirs, we used a phylogenetic-focused approach to analyze the host-associated eukaryotic microbiomes of 220 animal specimens spanning nine different animal phyla. RESULTS Our data expanded the traditional host range of several microbial taxa and identified numerous undescribed lineages. A lack of comparable reference sequences resulted in several cryptic clades within the Apicomplexa and Ciliophora and emphasized the potential for microbial invertebrates to harbor novel protistan and fungal diversity. CONCLUSIONS Microscopic marine invertebrates, spanning a wide range of animal phyla, host various protist and fungal sequences and may therefore serve as a useful resource in the detection and characterization of undescribed symbioses. Video Abstract.
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Affiliation(s)
- Corey C Holt
- Department of Botany, University of British Columbia, Vancouver, Canada.
- Hakai Institute, Heriot Bay, Canada.
| | - Vittorio Boscaro
- Department of Botany, University of British Columbia, Vancouver, Canada
- Hakai Institute, Heriot Bay, Canada
| | - Niels W L Van Steenkiste
- Department of Botany, University of British Columbia, Vancouver, Canada
- Hakai Institute, Heriot Bay, Canada
- Department of Zoology, University of British Columbia, Vancouver, Canada
| | - Maria Herranz
- Department of Botany, University of British Columbia, Vancouver, Canada
- Hakai Institute, Heriot Bay, Canada
- Department of Zoology, University of British Columbia, Vancouver, Canada
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Varsha Mathur
- Department of Botany, University of British Columbia, Vancouver, Canada
| | | | - Gracy Buckholtz
- Department of Botany, University of British Columbia, Vancouver, Canada
| | - Brian S Leander
- Department of Botany, University of British Columbia, Vancouver, Canada
- Department of Zoology, University of British Columbia, Vancouver, Canada
| | - Patrick J Keeling
- Department of Botany, University of British Columbia, Vancouver, Canada.
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10
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Cho JH, Jun NS, Park JM, Bang KI, Hong JW. Fungal Load of Groundwater Systems in Geographically Segregated Islands: A Step Forward in Fungal Control. MYCOBIOLOGY 2022; 50:345-356. [PMID: 36404906 PMCID: PMC9645270 DOI: 10.1080/12298093.2022.2123549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
The fungal distribution, diversity, and load were analyzed in the geographically segregated island groundwater systems in Korea. A total of 79 fungal isolates were secured from seven islands and identified based on the internal transcribed spacer (ITS) sequences. They belonged to three phyla (Ascomycota, Basidiomycota, and Chlorophyta), five classes, sixteen orders, twenty-two families, and thirty-one genera. The dominant phylum was Ascomycota (91.1%), with most fungi belonging to the Cladosporium (21.5%), Aspergillus (15.2%), and Stachybotrys (8.9%) genera. Cladosporium showed higher dominance and diversity, being widely distributed throughout the geographically segregated groundwater systems. Based on the diversity indices, the genera richness (4.821) and diversity (2.550) were the highest in the groundwater system of the largest scale. As turbidity (0.064-0.462) increased, the overall fungal count increased and the residual chlorine (0.089-0.308) had low relevance compared with the total count and fungal diversity. Cladosporium showed normal mycelial growth in de-chlorinated sterilized samples. Overall, if turbidity increases under higher fungal diversity, bio-deterioration in groundwater-supplying facilities and public health problems could be intensified, regardless of chlorine treatment. In addition to fungal indicators and analyzing methods, physical hydrostatic treatment is necessary for monitoring and controlling fungal contamination.
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Affiliation(s)
- Joong Hee Cho
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Nam Soo Jun
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Jong Myong Park
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Ki In Bang
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Ji Won Hong
- Department of Hydrogen and Renewable Energy, Kyungpook National University, Daegu, Republic of Korea
- Advanced Bio-resource Research Center, Kyungpook National University, Daegu, Republic of Korea
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Géry A, Séguin V, Eldin de Pécoulas P, Bonhomme J, Garon D. Aspergilli series Versicolores: importance of species identification in the clinical setting. Crit Rev Microbiol 2022:1-14. [PMID: 35758008 DOI: 10.1080/1040841x.2022.2082267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The moulds of the genus Aspergillus section Nidulantes series Versicolores are ubiquitous and particularly recurrent in indoor air. They are considered present in 70% of the bioaerosols to which we are exposed most of our time spent indoors. With the taxonomic revision proposed in 2012 and the discovery of four new species, the series Versicolores currently includes 18 species. These moulds, although considered as cryptic (except Aspergillus sydowii), are opportunistic pathogens that can exhibit increased minimal inhibitory concentrations to conventional antifungal agents. In this review, we discuss the ecology and clinical implications of each species belonging to the series Versicolores. This survey also highlights the lack of consideration for taxonomic revisions in clinical practice and in scientific studies which greatly limits the acquisition of specific knowledge on species belonging to the series Versicolores.
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Affiliation(s)
- Antoine Géry
- Unicaen and Unirouen, ToxEMAC-ABTE, Centre F. Baclesse, Normandie Univ, Caen, France
| | - Virginie Séguin
- Unicaen and Unirouen, ToxEMAC-ABTE, Centre F. Baclesse, Normandie Univ, Caen, France
| | | | - Julie Bonhomme
- Unicaen and Unirouen, ToxEMAC-ABTE, Centre F. Baclesse, Normandie Univ, Caen, France.,Department of Microbiology, Caen University Hospital, Caen, France
| | - David Garon
- Unicaen and Unirouen, ToxEMAC-ABTE, Centre F. Baclesse, Normandie Univ, Caen, France
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12
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Practical synthesis of aromatic bisabolanes: Synthesis of 1,3,5-bisabolatrien-7-ol, peniciaculin A and B, and hydroxysydonic acid. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Hou XM, Hai Y, Gu YC, Wang CY, Shao CL. Chemical and Bioactive Marine Natural Products of Coral-Derived Microorganisms (2015-2017). Curr Med Chem 2020; 26:6930-6941. [PMID: 31241431 DOI: 10.2174/0929867326666190626153819] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/22/2018] [Accepted: 12/14/2018] [Indexed: 01/28/2023]
Abstract
Coral-derived microorganisms are known for their inherent ability to produce novel products of pharmaceutical importance. Nearly 260 marine natural products (MNPs) have been isolated from coral-derived microorganisms till 2014. In the last three years, 118 MNPs have been isolated from coral-associated microorganisms including 46 new compounds, two with a novel skeleton, and four new natural products. Most of them exhibited in vitro or in vivo activities against tumor cell lines, parasites, pathogenic bacteria, fungi and virus. We reviewed the natural products reported from 2015 to 2017 that have a wide range of bioactivities against different biological targets.
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Affiliation(s)
- Xue-Mei Hou
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Yang Hai
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre, Bracknell RG42 6EY, Berkshire, United Kingdom
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.,Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
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14
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Antimicrobial Secondary Metabolites from the Seawater-Derived Fungus Aspergillus sydowii SW9. Molecules 2019; 24:molecules24244596. [PMID: 31888157 PMCID: PMC6943586 DOI: 10.3390/molecules24244596] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/05/2019] [Accepted: 12/11/2019] [Indexed: 11/16/2022] Open
Abstract
Marine-derived fungi are considered to be valuable producers of bioactive secondary metabolites used as lead compounds with medicinal importance. In this study, chemical investigation of the seawater-derived fungus Aspergillus sydowii SW9 led to the isolation and identification of one new quinazolinone alkaloid, 2-(4-hydroxybenzyl)-4-(3-acetyl)quinazolin-one (1), one new aromatic bisabolene-type sesquiterpenoid, (2) and one new chorismic acid analogue (3), as well as two known alkaloids (compounds 4 and 5). Their structures were determined by extensive 1D/2D NMR and mass spectrometric data, and the absolute configurations of 2 and 3 were assigned by the analysis of ECD spectra aided by quantum chemical computations. Compounds 1, 2, and 4 exhibited selective inhibitory activities against the human pathogenic bacteria Escherichia coli, Staphylococcus aureus, S. epidermidis, and Streptococcus pneumoniae, with MIC values ranging from 2.0 to 16 μg/mL.
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15
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Amin M, Liang X, Ma X, Dong JD, Qi SH. New pyrone and cyclopentenone derivatives from marine-derived fungus Aspergillus sydowii SCSIO 00305. Nat Prod Res 2019; 35:318-326. [PMID: 31204847 DOI: 10.1080/14786419.2019.1629919] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Two new 2-pyrone derivatives sydowiones A-B (1, 2), one new cyclopentenone derivative sydowione C (3), and one new mycotoxin 6-methoxyl austocystin A (4) along with two known analogues paecilpyrone A (5) and austocystin A (6), were isolated from the marine-derived fungus Aspergillus sydowii SCSIO 00305. The structures of 1-4 were elucidated by extensive spectroscopic analysis. The absolute configuration of C-8 in 1 was established by Mosher method, and further confirmed by calculation of the electronic circular dichroism (ECD) spectra. The absolute configuration of C-11 in 3 was also determined by calculation of ECD spectra. The absolute configuration of 6 was determined by a single-crystal X-ray diffraction experiment for the first time. Compounds 1-4 showed moderate toxicity towards brine shrine naupalii with LC50 values of 19.5, 14.3, 8.3 and 2.9 μM, respectively. And 1 and 2 also showed antioxidant activity against 2,2-diphenyl-picrylhydrazyl (DPPH) radicals with IC50 values of 46.0 and 46.6 μM, respectively.[Formula: see text].
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Affiliation(s)
- Muhammad Amin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institution of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangdong, Guangzhou, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Xiao Liang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institution of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangdong, Guangzhou, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Xuan Ma
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institution of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangdong, Guangzhou, China
| | - Jun-De Dong
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institution of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangdong, Guangzhou, China
| | - Shu-Hua Qi
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, Institution of South China Sea Ecology and Environmental Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangdong, Guangzhou, China
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16
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Amend A, Burgaud G, Cunliffe M, Edgcomb VP, Ettinger CL, Gutiérrez MH, Heitman J, Hom EFY, Ianiri G, Jones AC, Kagami M, Picard KT, Quandt CA, Raghukumar S, Riquelme M, Stajich J, Vargas-Muñiz J, Walker AK, Yarden O, Gladfelter AS. Fungi in the Marine Environment: Open Questions and Unsolved Problems. mBio 2019; 10:e01189-18. [PMID: 30837337 PMCID: PMC6401481 DOI: 10.1128/mbio.01189-18] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Terrestrial fungi play critical roles in nutrient cycling and food webs and can shape macroorganism communities as parasites and mutualists. Although estimates for the number of fungal species on the planet range from 1.5 to over 5 million, likely fewer than 10% of fungi have been identified so far. To date, a relatively small percentage of described species are associated with marine environments, with ∼1,100 species retrieved exclusively from the marine environment. Nevertheless, fungi have been found in nearly every marine habitat explored, from the surface of the ocean to kilometers below ocean sediments. Fungi are hypothesized to contribute to phytoplankton population cycles and the biological carbon pump and are active in the chemistry of marine sediments. Many fungi have been identified as commensals or pathogens of marine animals (e.g., corals and sponges), plants, and algae. Despite their varied roles, remarkably little is known about the diversity of this major branch of eukaryotic life in marine ecosystems or their ecological functions. This perspective emerges from a Marine Fungi Workshop held in May 2018 at the Marine Biological Laboratory in Woods Hole, MA. We present the state of knowledge as well as the multitude of open questions regarding the diversity and function of fungi in the marine biosphere and geochemical cycles.
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Affiliation(s)
- Anthony Amend
- Department of Botany, University of Hawai'i at Manoa, Honolulu, Hawaii, USA
| | - Gaetan Burgaud
- Université de Brest, EA 3882, Laboratoire Universitaire de Biodiversité et Ecologie Microbienne, ESIAB, Technopôle Brest-Iroise, Plouzané, France
| | - Michael Cunliffe
- Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom
| | - Virginia P Edgcomb
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
| | | | - M H Gutiérrez
- Departamento de Oceanografía, Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Concepción, Chile
| | - Joseph Heitman
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Erik F Y Hom
- Department of Biology, University of Mississippi, Oxford, Mississippi, USA
| | - Giuseppe Ianiri
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Adam C Jones
- Gordon and Betty Moore Foundation, Palo Alto, California, USA
| | - Maiko Kagami
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
| | - Kathryn T Picard
- Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA
| | - C Alisha Quandt
- Ecology and Evolutionary Biology Department, University of Colorado, Boulder, Colorado, USA
| | | | - Mertixell Riquelme
- Department of Microbiology, Centro de Investigación Científica y Educación Superior de Ensenada (CICESE), Ensenada, Baja California, Mexico
| | - Jason Stajich
- Department of Microbiology & Plant Pathology and Institute for Integrative Genome Biology, University of California-Riverside, Riverside, California, USA
| | - José Vargas-Muñiz
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Allison K Walker
- Department of Biology, Acadia University, Wolfville, Nova Scotia, Canada
| | - Oded Yarden
- Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Amy S Gladfelter
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Marine Biological Laboratory, Woods Hole, Massachusetts, USA
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17
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Hayashi A, José Dorantes-Aranda J, Bowman JP, Hallegraeff G. Combined Cytotoxicity of the Phycotoxin Okadaic Acid and Mycotoxins on Intestinal and Neuroblastoma Human Cell Models. Toxins (Basel) 2018; 10:toxins10120526. [PMID: 30544794 PMCID: PMC6315785 DOI: 10.3390/toxins10120526] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 11/29/2018] [Accepted: 12/01/2018] [Indexed: 11/18/2022] Open
Abstract
Mycotoxins are emerging toxins in the marine environment, which can co-occur with algal toxins to exert synergistic or antagonistic effects for human seafood consumption. The current study assesses the cytotoxicity of the algal toxin okadaic acid, shellfish, and dust storm-associated mycotoxins alone or in combination on human intestinal (HT-29) and neuroblastoma (SH-SY5Y) cell lines. Based on calculated IC50 (inhibitory concentration 50%) values, mycotoxins and the algal toxin on their own exhibited increased cytotoxicity in the order of sydowinin A < sydowinin B << patulin < alamethicin < sydowinol << gliotoxin ≈ okadaic acid against the HT-29 cell line, and sydowinin B < sydowinin A << alamethicin ≈ sydowinol < patulin, << gliotoxin < okadaic acid against the SH-SY5Y cell line. Combinations of okadaic acid–sydowinin A, –alamethicin, –patulin, and –gliotoxin exhibited antagonistic effects at low-moderate cytotoxicity, but became synergistic at high cytotoxicity, while okadaic acid–sydowinol displayed an antagonistic relationship against HT-29 cells. Furthermore, only okadaic acid–sydowinin A showed synergism, while okadaic acid–sydowinol, –alamethicin, –patulin, and –gliotoxin combinations demonstrated antagonism against SH-SY5Y. While diarrhetic shellfish poisoning (DSP) from okadaic acid and analogues in many parts of the world is considered to be a comparatively minor seafood toxin syndrome, our human cell model studies suggest that synergisms with certain mycotoxins may aggravate human health impacts, depending on the concentrations. These findings highlight the issues of the shortcomings of current regulatory approaches, which do not regulate for mycotoxins in shellfish and treat seafood toxins as if they occur as single toxins.
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Affiliation(s)
- Aiko Hayashi
- Institute for Marine and Antarctic Studies, University of Tasmania, 7004 Hobart, Australia.
| | | | - John P Bowman
- Tasmanian Institute of Agriculture, University of Tasmania, 7005 Hobart, Australia.
| | - Gustaaf Hallegraeff
- Institute for Marine and Antarctic Studies, University of Tasmania, 7004 Hobart, Australia.
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19
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Greco G, Cecchi G, Di Piazza S, Cutroneo L, Capello M, Zotti M. Fungal characterisation of a contaminated marine environment: the case of the Port of Genoa (North-Western Italy). ACTA ACUST UNITED AC 2018. [DOI: 10.1080/00837792.2017.1417964] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Sun JY, Song Y, Ma ZP, Zhang HJ, Yang ZD, Cai ZH, Zhou J. Fungal community dynamics during a marine dinoflagellate (Noctiluca scintillans) bloom. MARINE ENVIRONMENTAL RESEARCH 2017; 131:183-194. [PMID: 29017729 DOI: 10.1016/j.marenvres.2017.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/27/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Contamination and eutrophication have caused serious ecological events (such as algal bloom) in coastal area. During this ecological process, microbial community structure is critical for algal bloom succession. The diversity and composition of bacteria and archaea communities in algal blooms have been widely investigated; however, those of fungi are poorly understood. To fill this gap, we used pyrosequencing and correlation approaches to assess fungal patterns and associations during a dinoflagellate (Noctiluca scintillans) bloom. Phylum level fungal types were predominated by Ascomycota, Chytridiomycota, Mucoromycotina, and Basidiomycota. At the genus level drastic changes were observed with Hysteropatella, Malassezia and Saitoella dominating during the initial bloom stage, while Malassezia was most abundant (>50%) during onset and peak-bloom stages. Saitoella and Lipomyces gradually became more abundant and, in the decline stage, contributed almost 70% of sequences. In the terminal stage of the bloom, Rozella increased rapidly to a maximum of 50-60%. Fungal population structure was significantly influenced by temperature and substrate (N and P) availability (P < 0.05). Inter-specific network analyses demonstrated that Rozella and Saitoella fungi strongly impacted the ecological trajectory of N. scintillans. The functional prediction show that symbiotrophic fungi was dominated in the onset stage; saprotroph type was the primary member present during the exponential growth period; whereas pathogentroph type fungi enriched in decline phase. Overall, fungal communities and functions correlated significantly with N. scintillans processes, suggesting that they may regulate dinoflagellate bloom fates. Our results will facilitate deeper understanding of the ecological importance of marine fungi and their roles in algal bloom formation and collapse.
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Affiliation(s)
- Jing-Yun Sun
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China; School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, PR China
| | - Yu Song
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China
| | - Zhi-Ping Ma
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China
| | - Huai-Jing Zhang
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China
| | - Zhong-Duo Yang
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, PR China; The Provincial Education Key Laboratory of Screening, Evaluation and Advanced Processing of Traditional Chinese Medicine and Tibetan Medicine, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, Gansu Province, PR China
| | - Zhong-Hua Cai
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China.
| | - Jin Zhou
- Shenzhen Public Platform for Screening and Application of Marine Microbial Resources, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, Guangdong Province, PR China.
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21
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Greco G, Capello M, Cecchi G, Cutroneo L, Di Piazza S, Zotti M. Another possible risk for the Mediterranean Sea? Aspergillus sydowii discovered in the Port of Genoa (Ligurian Sea, Italy). MARINE POLLUTION BULLETIN 2017; 122:470-474. [PMID: 28651864 DOI: 10.1016/j.marpolbul.2017.06.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 06/06/2017] [Accepted: 06/20/2017] [Indexed: 06/07/2023]
Abstract
Aspergillus sydowii is a cosmopolitan fungus that has been responsible for the mass destruction of coral in the Caribbean Sea over the last 15years. To our knowledge, this study has found the first case of A. sydowii in the Mediterranean Sea, in marine-bottom sediments, water and calcareous shells of bivalve molluscs sampled during a campaign to characterise the mycobiota in the Port of Genoa (Italy). The area is characterised by adverse environmental conditions (high turbidity, organic pollution and high concentrations of phosphorus and nitrogen compounds). These parameters, in combination with a rising temperature, could contribute to A. sydowii bloom and dispersal. This fungal strain may have been imported into the Port of Genoa in the bilge water of vessels or by torrent input. This work represents the first step in the implementation of a monitoring programme to safeguard calcareous sponges and sea fan corals endemic in the Mediterranean Sea.
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Affiliation(s)
- G Greco
- DISTAV, University of Genoa, 26 Corso Europa, Genoa I-16132, Italy
| | - M Capello
- DISTAV, University of Genoa, 26 Corso Europa, Genoa I-16132, Italy
| | - G Cecchi
- DISTAV, University of Genoa, 26 Corso Europa, Genoa I-16132, Italy
| | - L Cutroneo
- DISTAV, University of Genoa, 26 Corso Europa, Genoa I-16132, Italy.
| | - S Di Piazza
- DISTAV, University of Genoa, 26 Corso Europa, Genoa I-16132, Italy
| | - M Zotti
- DISTAV, University of Genoa, 26 Corso Europa, Genoa I-16132, Italy
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22
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Gleason FH, Gadd GM, Pitt JI, Larkum AWD. The roles of endolithic fungi in bioerosion and disease in marine ecosystems. II. Potential facultatively parasitic anamorphic ascomycetes can cause disease in corals and molluscs. Mycology 2017; 8:216-227. [PMID: 30123642 PMCID: PMC6059078 DOI: 10.1080/21501203.2017.1371802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 08/22/2017] [Indexed: 10/29/2022] Open
Abstract
Anamorphic ascomycetes have been implicated as causative agents of diseases in tissues and skeletons of hard corals, in tissues of soft corals (sea fans) and in tissues and shells of molluscs. Opportunist marine fungal pathogens, such as Aspergillus sydowii, are important components of marine mycoplankton and are ubiquitous in the open oceans, intertidal zones and marine sediments. These fungi can cause infection in or at least can be associated with animals which live in these ecosystems. A. sydowii can produce toxins which inhibit photosynthesis in and the growth of coral zooxanthellae. The prevalence of many documented infections has increased in frequency and severity in recent decades with the changing impacts of physical and chemical factors, such as temperature, acidity and eutrophication. Changes in these factors are thought to cause significant loss of biodiversity in marine ecosystems on a global scale in general, and especially in coral reefs and shallow bays.
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Affiliation(s)
- Frank H. Gleason
- School of Life and Environmental Sciences, University of Sydney, Sydney, Australia
| | - Geoffrey M. Gadd
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, UK
| | - John I. Pitt
- Food, Safety and Quality, CSIRO, Ryde, Australia
| | - Anthony W. D. Larkum
- School of Life and Environmental Sciences, University of Sydney, Sydney, Australia
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Pang KL, Overy DP, Jones EG, Calado MDL, Burgaud G, Walker AK, Johnson JA, Kerr RG, Cha HJ, Bills GF. ‘Marine fungi’ and ‘marine-derived fungi’ in natural product chemistry research: Toward a new consensual definition. FUNGAL BIOL REV 2016. [DOI: 10.1016/j.fbr.2016.08.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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