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Ou-Yang K, Zhang Q, Wang L, Yang H, He Y, Li D, Li L. New insights into endocrine reproductive toxicity of Microcystis aeruginosa combined with ammonia exposure in zebrafish. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 342:123021. [PMID: 37995953 DOI: 10.1016/j.envpol.2023.123021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 11/25/2023]
Abstract
The ecological risk posed by MCs-producing M. aeruginosa and elevated ammonia to fish in actual aquatic environments remains uncertain. To address this knowledge gap, we conducted simulations to investigate the endocrine-reproductive toxicity of prolonged exposure (45 d) to Microcystis aeruginosa (2 × 10^6 cells/mL) and 30 mg/L total ammonia nitrogen (TAN) in zebrafish under environmentally relevant conditions. Our results showed that exposure to M. aeruginosa significantly inhibited the body weight, increased gonadosomatic index (GSI), delayed oocyte development, and disrupted endocrine hormonal balance (reduced gonadotropin-releasing hormone (GnRH), and increased estradiol (E2) and testosterone (T)). Mechanistically, it should be attributed to the over-expression of hypothalamic-pituitary-gonadal-liver (HPGL) axis-related genes (cyp11a and cyp17) induced by M. aeruginosa. On the other hand, TAN exposure caused mild damage to zebrafish ovarian tissue and promoted an increase of T levels by inducing the upregulation of steroid hormone synthesis gene (3βhsd) expression in the ovary. It is worth noting that the dysregulation of E2/T ratio in zebrafish ovaries may be attributed to the inhibition of cyp19a1a by both M. aeruginosa and TAN. These results were further confirmed by changes in steroidogenic enzymes activities in the M. aeruginosa or TAN treated groups. Our findings indicated that exposure to M. aeruginosa and TAN had adverse impacts on the reproductive system of zebrafish. And the combined exposure of M. aeruginosa and TAN had more severe effects on the body weight, GSI, pathological changes, hormone levels and HPGL-axis related gene expression in female zebrafish. These results provide compelling evidence regarding the potential risks for reproductive health associated with M. aeruginosa and TAN in eutrophic water bodies experiencing M. aeruginosa blooms, and contribute to the development of effective strategies for monitoring and managing these toxins in aquatic ecosystems.
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Affiliation(s)
- Kang Ou-Yang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Qian Zhang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Liangmou Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Hui Yang
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Ya He
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Dapeng Li
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, 430070, PR China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, PR China
| | - Li Li
- College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan, 430070, PR China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan, 430070, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan, 430070, PR China.
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Ou-Yang K, Kuang Y, Yang H, He Y, Wang L, Wang X, Li D, Li L. Multi-omics analysis reveals the toxic mechanism of ammonia-enhanced Microcystis aeruginosa exposure causing liver fat deposition and muscle nutrient loss in zebrafish. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132631. [PMID: 37816294 DOI: 10.1016/j.jhazmat.2023.132631] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/12/2023]
Abstract
Microcystis aeruginosa and ammonia pollution are two important environmental stress factors in water eutrophication. Herein, we simulated environmental conditions to investigate the effects of chronic exposure (single and combined) to M. aeruginosa and total ammonia nitrogen (TAN) on lipid metabolism and muscle quality in zebrafish. Our results showed that M. aeruginosa and TAN significantly induced lipid deposition and tissue damage in the liver of zebrafish. Liver transcriptomic analysis revealed that M. aeruginosa and TAN disrupted the balance in lipid synthesis, decomposition, and transport, ultimately leading to hepatic lipid accumulation. Moreover, exposure to M. aeruginosa or TAN alone resulted in decreased crude protein content and increased lipid content in muscle, as well as disrupted muscle fatty acid composition. Metabolomic analysis of muscle revealed significant alterations in metabolites such as glycerolipids, glycerophospholipids and fatty acids. The co-exposure of M. aeruginosa and TAN had a more significant effect on liver lipid dysfunction and muscle quality deterioration in zebrafish. These findings provide valuable insights into the potential risks and hazards of M. aeruginosa and TAN in eutrophic water bodies subject to Microcystis blooms, and can help inform effective strategies for monitoring and managing these toxins in aquatic ecosystems.
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Affiliation(s)
- Kang Ou-Yang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Yu Kuang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Hui Yang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Ya He
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Liangmou Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Xinyu Wang
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Dapeng Li
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, PR China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan 430070, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PR China
| | - Li Li
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, PR China; Engineering Research Center of Green development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, Wuhan 430070, PR China; Hubei Provincial Engineering Laboratory for Pond Aquaculture, Wuhan 430070, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, PR China.
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Zhang Y, Escobar A, Guo T, Xu CQ. Label-Free Cyanobacteria Quantification Using a Microflow Cytometry Platform for Early Warning Detection and Characterization of Hazardous Cyanobacteria Blooms. MICROMACHINES 2023; 14:mi14050965. [PMID: 37241590 DOI: 10.3390/mi14050965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/21/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023]
Abstract
The eutrophication of aquatic ecosystems caused by rapid human urbanization has led to an increased production of potentially hazardous bacterial populations, known as blooms. One of the most notorious forms of these aquatic blooms are cyanobacteria, which in sufficiently large quantities can pose a hazard to human health through ingestion or prolonged exposure. Currently, one of the greatest difficulties in regulating and monitoring these potential hazards is the early detection of cyanobacterial blooms, in real time. Therefore, this paper presents an integrated microflow cytometry platform for label-free phycocyanin fluorescence detection, which can be used for the rapid quantification of low-level cyanobacteria and provide early warning alerts for potential harmful cyanobacterial blooms. An automated cyanobacterial concentration and recovery system (ACCRS) was developed and optimized to reduce the assay volume, from 1000 mL to 1 mL, to act as a pre-concentrator and subsequently enhance the detection limit. The microflow cytometry platform utilizes an on-chip laser-facilitated detection to measure the in vivo fluorescence emitted from each individual cyanobacterial cell, as opposed to measuring overall fluorescence of the whole sample, potentially decreasing the detection limit. By applying transit time and amplitude thresholds, the proposed cyanobacteria detection method was verified by the traditional cell counting technique using a hemocytometer with an R2 value of 0.993. It was shown that the limit of quantification of this microflow cytometry platform can be as low as 5 cells/mL for Microcystis aeruginosa, 400-fold lower than the Alert Level 1 (2000 cells/mL) set by the World Health Organization (WHO). Furthermore, the decreased detection limit may facilitate the future characterization of cyanobacterial bloom formation to better provide authorities with ample time to take the appropriate actions to mitigate human risk from these potentially hazardous blooms.
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Affiliation(s)
- Yushan Zhang
- Department of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Andres Escobar
- Department of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Tianyi Guo
- Forsee Instruments Ltd., Hamilton, ON L8P 0A1, Canada
| | - Chang-Qing Xu
- Department of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada
- Department of Engineering Physics, McMaster University, Hamilton, ON L8S 4L8, Canada
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Sound JK, Peters A, Bellamy-Carter J, Rad-Menéndez C, MacKechnie K, Green DH, Leney AC. Rapid Cyanobacteria Species Identification with High Sensitivity Using Native Mass Spectrometry. Anal Chem 2021; 93:14293-14299. [PMID: 34657414 PMCID: PMC8552214 DOI: 10.1021/acs.analchem.1c03412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyanobacteria have evolved over billions of years to adapt and survive in diverse climates. Environmentally, this presents a huge challenge because cyanobacteria can now rapidly form algae blooms that are detrimental to aquatic life. In addition, many cyanobacteria produce toxins, making them hazardous to animals and humans that they encounter. Rapid identification of cyanobacteria is essential to monitor and prevent toxic algae blooms. Here, we show for the first time how native mass spectrometry can quickly and precisely identify cyanobacteria from diverse aquatic environments. By monitoring phycobiliproteins, abundant protein complexes within cyanobacteria, simple, easy-to-understand mass spectral "fingerprints" were created that were unique to each species. Moreover, our method is 10-fold more sensitive than the current MALDI-TOF mass spectrometric methods, meaning that cyanobacteria can be monitored using this technology prior to bloom formation. Together, the data show great promise for the simultaneous detection and identification of co-existing cyanobacteria in situ.
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Affiliation(s)
- Jaspreet K Sound
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | - Anna Peters
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
| | | | - Cecilia Rad-Menéndez
- Scottish Association for Marine Science, Argyll PA37 1QA, U.K.,Culture Collection of Algae and Protozoa (CCAP), Scottish Marine Institute, Oban PA37 1QA, U.K
| | - Karen MacKechnie
- Scottish Association for Marine Science, Argyll PA37 1QA, U.K.,Culture Collection of Algae and Protozoa (CCAP), Scottish Marine Institute, Oban PA37 1QA, U.K
| | - David H Green
- Scottish Association for Marine Science, Argyll PA37 1QA, U.K
| | - Aneika C Leney
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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Asukabe H, Akahori S, Ueno E, Nakayama T, Yamashita R, Arii S, Harada KI, Imanishi SY. Cyanobacterial Classification with the Toxicity Using MALDI Biotyper. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:1572-1578. [PMID: 32501712 DOI: 10.1021/jasms.0c00148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An abnormal growth of cyanobacteria in eutrophicated freshwaters can cause various environmental problems. In particular, Microcystis producing hepatotoxic cyclic heptapeptides microcystins (MCs) has been globally observed. Recent studies have demonstrated that matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) offers a rapid classification of cyanobacteria; however, they have not fully considered the toxicity yet. In this study, we have performed MALDI-TOF MS for intact cyanobacterial cells using Biotyper software and optimized their conditions to achieve cyanobacterial classification with the toxicity. The detection mass range used for Biotyper was extended to cover small molecules, but their intense ions were suppressed as a function of the used instrument Autoflex Speed, which enabled simultaneous observations of large molecular fingerprints and small MCs with comparable ion intensity. Hierarchical clustering of mass spectra obtained under the optimized conditions differentiated toxic and non-toxic clusters of Microcystis strains and furthermore formed a tight cluster of non-toxic strains possessing the MC biosynthesis gene mcyG. Spectral libraries were expanded to >30 genera (>80 strains) under the default and optimized conditions to improve the confidence of cyanobacterial classification. Consequently, spectral library searching allowed for characterization of cyanobacteria from a field sample as mixed toxic and non-toxic Microcystis cells, without isolating those cells.
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Affiliation(s)
- Hirohiko Asukabe
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Satoko Akahori
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Ema Ueno
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Takuma Nakayama
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Ryuji Yamashita
- Graduate School of Environmental and Human Sciences, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Suzue Arii
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Ken-Ichi Harada
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
- Graduate School of Environmental and Human Sciences, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
| | - Susumu Y Imanishi
- Faculty of Pharmacy, Meijo University, Yagotoyama 150, Tempaku, Nagoya 468-8503, Japan
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The Diversity of Cyanobacterial Toxins on Structural Characterization, Distribution and Identification: A Systematic Review. Toxins (Basel) 2019; 11:toxins11090530. [PMID: 31547379 PMCID: PMC6784007 DOI: 10.3390/toxins11090530] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/06/2019] [Accepted: 09/09/2019] [Indexed: 11/19/2022] Open
Abstract
The widespread distribution of cyanobacteria in the aquatic environment is increasing the risk of water pollution caused by cyanotoxins, which poses a serious threat to human health. However, the structural characterization, distribution and identification techniques of cyanotoxins have not been comprehensively reviewed in previous studies. This paper aims to elaborate the existing information systematically on the diversity of cyanotoxins to identify valuable research avenues. According to the chemical structure, cyanotoxins are mainly classified into cyclic peptides, alkaloids, lipopeptides, nonprotein amino acids and lipoglycans. In terms of global distribution, the amount of cyanotoxins are unbalanced in different areas. The diversity of cyanotoxins is more obviously found in many developed countries than that in undeveloped countries. Moreover, the threat of cyanotoxins has promoted the development of identification and detection technology. Many emerging methods have been developed to detect cyanotoxins in the environment. This communication provides a comprehensive review of the diversity of cyanotoxins, and the detection and identification technology was discussed. This detailed information will be a valuable resource for identifying the various types of cyanotoxins which threaten the environment of different areas. The ability to accurately identify specific cyanotoxins is an obvious and essential aspect of cyanobacterial research.
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