1
|
Second Laboratory Validation of β-N-Methylamino-L-Alanine, N-(2aminoethyl)Glycine, and 2,4-Diaminobuytric Acid by Ultra-Performance Liquid Chromatography and Tandem Mass Spectrometry. Neurotox Res 2020; 39:107-116. [PMID: 32462275 DOI: 10.1007/s12640-020-00208-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/23/2020] [Accepted: 04/14/2020] [Indexed: 12/16/2022]
Abstract
The analysis of β-N-methylamino-L-alanine (BMAA) has been validated according to AOAC international standards by a single laboratory (Glover et al. 2015). Using the same validated method, we add a second laboratory validation optimizing for different equipment. Given publicized concerns about standardizing methods across laboratories and recent reviews indicating superior results using 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate derivatization for the separation of BMAA and its isomers N-(2aminoethyl)glycine (AEG), and 2,4-diaminobuytric acid (DAB) (Bishop and Murch 2019), we add a second laboratory validation to this method demonstrating that the method is robust across laboratories using different equipment. Using the US Food and Drug Administration (FDA 2018) method for evaluating instrument parameters, we calculated a limit of detection (LOD) of 10 pg/ml for BMAA, AEG, and DAB and lower limits of quantification (LLOQ) of 37 pg/ml based on reagent blanks. In biological matrices, a higher LLOQ may be warranted for AEG and DAB. We demonstrate that the endogenous BMAA in mussel tissue can be lost by drying the hydrolyzed preparation and suggest sample preparation parameters be evaluated for robustness.
Collapse
|
2
|
Bishop SL, Murch SJ. A systematic review of analytical methods for the detection and quantification of β-N-methylamino-l-alanine (BMAA). Analyst 2019; 145:13-28. [PMID: 31742261 DOI: 10.1039/c9an01252d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Neurodegenerative diseases are influenced by environmental factors such as exposure to toxins including the cyanotoxin β-N-methylamino-l-alanine (BMAA) that can bioaccumulate in common food sources such as fish, mussels and crabs. Accurate and precise analytical methods are needed to detect and quantify BMAA to minimize human health risks. The objective of this review is to provide a comprehensive overview of the methods used for BMAA analysis from 2003 to 2019 and to evaluate the reported performance characteristics for each method to determine the consensus data for each analytical approach and different sample matrices. Detailed searches of the database Web of Science™ (WoS) were performed between August 21st, 2018 and April 5th, 2019. Eligible studies included analytical methods for the detection and quantification of BMAA in cyanobacteria and bioaccumulated BMAA in higher trophic levels, in phytoplankton and zooplankton and in human tissues and fluids. This systematic review has limitations in that only the English language literature is included and it did not include standard operating protocols nor any method validation data that have not been made public. We identified 148 eligible studies, of which a positive result for BMAA in one or more samples analyzed was reported in 84% (125 out of 148) of total studies, 57% of HILIC studies, 92% of RPLC studies and 71% of other studies. The largest discrepancy between different methods arose from the analysis of cyanobacteria samples, where BMAA was detected in 95% of RPLC studies but only in 25% of HILIC studies. Without sufficient published validation of each method's performance characteristics, it is difficult to establish each method as fit for purpose for each sample matrix. The importance of establishing methods as appropriate for their intended use is evidenced by the inconsistent reporting of BMAA across environmental samples, despite its prevalence in diverse ecosystems and food webs.
Collapse
Affiliation(s)
- Stephanie L Bishop
- Chemistry, University of British Columbia, Kelowna, British Columbia, CanadaV1V 1V7.
| | | |
Collapse
|
3
|
Insufficient evidence for BMAA transfer in the pelagic and benthic food webs in the Baltic Sea. Sci Rep 2019; 9:10406. [PMID: 31320701 PMCID: PMC6639344 DOI: 10.1038/s41598-019-46815-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 07/01/2019] [Indexed: 02/06/2023] Open
Abstract
The evidence regarding BMAA occurrence in the Baltic Sea is contradictory, with benthic sources appearing to be more important than pelagic ones. The latter is counterintuitive considering that the identified sources of this compound in the food webs are pelagic primary producers, such as diatoms, dinoflagellates, and cyanobacteria. To elucidate BMAA distribution, we analyzed BMAA in the pelagic and benthic food webs in the Northern Baltic Proper. As potential sources, phytoplankton communities were used. Pelagic food chain was represented by zooplankton, mysids and zooplanktivorous fish, whereas benthic invertebrates and benthivorous fish comprised the benthic chain. The trophic structure of the system was confirmed by stable isotope analysis. Contrary to the reported ubiquitous occurrence of BMAA in the Baltic food webs, only phytoplankton, zooplankton and mysids tested positive, whereas no measurable levels of this compound occurred in the benthic invertebrates and any of the tested fish species. These findings do not support the widely assumed occurrence and transfer of BMAA to the top consumers in the Baltic food webs. More controlled experiments and field observations are needed to understand the transfer and possible transformation of BMAA in the food web under various environmental settings.
Collapse
|
4
|
Mashayekhy Rad F, Zurita J, Gilles P, Rutgeerts LAJ, Nilsson U, Ilag LL, Leck C. Measurements of Atmospheric Proteinaceous Aerosol in the Arctic Using a Selective UHPLC/ESI-MS/MS Strategy. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:161-173. [PMID: 30019163 PMCID: PMC6318243 DOI: 10.1007/s13361-018-2009-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 06/11/2018] [Accepted: 06/12/2018] [Indexed: 05/24/2023]
Abstract
In this article, an analytical methodology to investigate the proteinaceous content in atmospheric size-resolved aerosols collected at the Zeppelin observatory (79 °N, 12 °E) at Ny Ålesund, Svalbard, from September to December 2015, is proposed. Quantitative determination was performed after acidic hydrolysis using ultrahigh-performance liquid chromatography in reversed-phase mode coupled to electrospray ionization tandem mass spectrometry. Chromatographic separation, as well as specificity in the identification, was achieved by derivatization of the amino acids with N-butyl nicotinic acid N-hydroxysuccinimide ester prior to the analysis. The chromatographic run was performed within 11 min and instrumental levels of detection (LODs) were between 0.2 and 8.1 pg injected on the column, except for arginine which exhibited an LOD of 37 pg. Corresponding method LODs were between 0.01 and 1.9 fmol/m3, based on the average air sampling volume of 57 m3. The sum of free amino acids and hydrolyzed polyamino acids was shown to vary within 6-2914 and 0.02-1417 pmol/m3 for particles in sizes < 2 and 2-10 μm in equivalent aerodynamic diameter, respectively. Leucine, alanine, and valine were the most abundant among the amino acids in both aerosol size fractions. In an attempt to elucidate source areas of the collected aerosols, 5- to 10-day 3D backward trajectories reaching the sampling station were calculated. Overall, the method described here provides a first time estimate of the proteinaceous content, that is, the sum of free and polyamino acids, in size-resolved aerosols collected in the Arctic. Graphical Abstract ᅟ.
Collapse
Affiliation(s)
- Farshid Mashayekhy Rad
- Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
- Department of Meteorology, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Javier Zurita
- Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Philippe Gilles
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Box 2404, 3001, Heverlee, Belgium
| | - Laurens A J Rutgeerts
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Box 2404, 3001, Heverlee, Belgium
| | - Ulrika Nilsson
- Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Leopold L Ilag
- Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Caroline Leck
- Department of Meteorology, Stockholm University, SE-106 91, Stockholm, Sweden
| |
Collapse
|
5
|
Occurrence of β-N-methylamino-l-alanine (BMAA) and Isomers in Aquatic Environments and Aquatic Food Sources for Humans. Toxins (Basel) 2018; 10:toxins10020083. [PMID: 29443939 PMCID: PMC5848184 DOI: 10.3390/toxins10020083] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/06/2018] [Accepted: 02/08/2018] [Indexed: 12/13/2022] Open
Abstract
The neurotoxin β-N-methylamino-l-alanine (BMAA), a non-protein amino acid produced by terrestrial and aquatic cyanobacteria and by micro-algae, has been suggested to play a role as an environmental factor in the neurodegenerative disease Amyotrophic Lateral Sclerosis-Parkinsonism-Dementia complex (ALS-PDC). The ubiquitous presence of BMAA in aquatic environments and organisms along the food chain potentially makes it public health concerns. However, the BMAA-associated human health risk remains difficult to rigorously assess due to analytical challenges associated with the detection and quantification of BMAA and its natural isomers, 2,4-diamino butyric acid (DAB), β-amino-N-methyl-alanine (BAMA) and N-(2-aminoethyl) glycine (AEG). This systematic review, reporting the current knowledge on the presence of BMAA and isomers in aquatic environments and human food sources, was based on a selection and a score numbering of the scientific literature according to various qualitative and quantitative criteria concerning the chemical analytical methods used. Results from the best-graded studies show that marine bivalves are to date the matrix containing the higher amount of BMAA, far more than most fish muscles, but with an exception for shark cartilage. This review discusses the available data in terms of their use for human health risk assessment and identifies knowledge gaps requiring further investigations.
Collapse
|
6
|
Cox PA, Kostrzewa RM, Guillemin GJ. BMAA and Neurodegenerative Illness. Neurotox Res 2017; 33:178-183. [PMID: 28540663 DOI: 10.1007/s12640-017-9753-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 05/12/2017] [Indexed: 01/02/2023]
Abstract
The cyanobacterial toxin β-N-methylamino-L-alanine (BMAA) now appears to be a cause of Guamanian amyotrophic lateral sclerosis/parkinsonism dementia complex (ALS/PDC). Its production by cyanobacteria throughout the world combined with multiple mechanisms of BMAA neurotoxicity, particularly to vulnerable subpopulations of motor neurons, has significantly increased interest in investigating exposure to this non-protein amino acid as a possible risk factor for other forms of neurodegenerative illness. We here provide a brief overview of BMAA studies and provide an introduction to this collection of scientific manuscripts in this special issue on BMAA.
Collapse
Affiliation(s)
- Paul Alan Cox
- Brain Chemistry Labs, Institute for Ethnomedicine, PO Box 3464, Jackson Hole, WY, 83001, USA.
| | - Richard M Kostrzewa
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, PO Box 70577, Johnson City, TN, 37614, USA
| | - Gilles J Guillemin
- Macquarie University, MND Research Centre, FMHS, 2 Technology Place, Sydney, NSW, 2109, Australia
| |
Collapse
|
7
|
Réveillon D, Abadie E, Séchet V, Masseret E, Hess P, Amzil Z. β-N-methylamino-l-alanine (BMAA) and isomers: Distribution in different food web compartments of Thau lagoon, French Mediterranean Sea. MARINE ENVIRONMENTAL RESEARCH 2015; 110:8-18. [PMID: 26254582 DOI: 10.1016/j.marenvres.2015.07.015] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 07/21/2015] [Accepted: 07/27/2015] [Indexed: 05/03/2023]
Abstract
The neurotoxin BMAA (β-N-methylamino-l-alanine) and its isomer DAB (2,4-diaminobutyric acid) have been detected in seafood worldwide, including in Thau lagoon (French Mediterranean Sea). A cluster of amyotrophic lateral sclerosis (ALS), a neurodegenerative disease associated with BMAA, has also been observed in this region. Mussels, periphyton (i.e. biofilms attached to mussels) and plankton were sampled between July 2013 and October 2014, and analyzed using HILIC-MS/MS. BMAA, DAB and AEG (N-(2-aminoethyl)glycine) were found in almost all the samples of the lagoon. BMAA and DAB were present at 0.58 and 0.83, 2.6 and 3.3, 4.0 and 7.2 μg g(-1) dry weight in plankton collected with nets, periphyton and mussels, respectively. Synechococcus sp., Ostreococcus tauri, Alexandrium catenella and eight species of diatoms were cultured and screened for BMAA and analogs. While Synechococcus sp., O. tauri and A. catenella did not produce BMAA under our culture conditions, four diatoms species contained both BMAA and DAB. Hence, diatoms may be a source of BMAA for mussels. Unlike other toxins produced by microalgae, BMAA and DAB were detected in significant amounts in tissues other than digestive glands in mussels.
Collapse
Affiliation(s)
- Damien Réveillon
- Ifremer, Laboratoire Phycotoxines, Rue de l'Ile d'Yeu, BP 21105, F-44311, Nantes, France.
| | - Eric Abadie
- Ifremer, Laboratoire Environnement Ressources Languedoc-Roussillon, UMR MARBEC (IRD - Ifremer - Univ. Montpellier - CNRS), Avenue Jean Monnet, CS30171 Sète, Cedex 3, France
| | - Véronique Séchet
- Ifremer, Laboratoire Phycotoxines, Rue de l'Ile d'Yeu, BP 21105, F-44311, Nantes, France
| | - Estelle Masseret
- Université de Montpellier, UMR MARBEC (IRD - Ifremer - Univ. Montpellier - CNRS), cc93, Place Eugène Bataillon, 34095, Montpellier, Cedex 5, France
| | - Philipp Hess
- Ifremer, Laboratoire Phycotoxines, Rue de l'Ile d'Yeu, BP 21105, F-44311, Nantes, France
| | - Zouher Amzil
- Ifremer, Laboratoire Phycotoxines, Rue de l'Ile d'Yeu, BP 21105, F-44311, Nantes, France
| |
Collapse
|