Abstract
Ciguatera fish poisoning (CFP) is a global foodborne illness caused by consumption of seafood containing ciguatoxins (CTXs) originating from dinoflagellates such as Gambierdiscus toxicus. P-CTX-1 has been suggested to be the most toxic CTX, causing ciguatera at 0.1 μg/kg in the flesh of carnivorous fish. CTXs are structurally complex and difficult to quantify, but there is a need for analytical methods for CFP toxins in coral reef fishes to protect human health. In this paper, we describe a sensitive and rapid extraction method using accelerated solvent extraction combined with high-performance liquid chromatography–tandem mass spectrometry (HPLC-MS/MS) for the detection and quantification of P-CTX-1 in fish flesh. By the use of a more sensitive MS system (5500 QTRAP), the validated method has a limit of quantification (LOQ) of 0.01 μg/kg, linearity correlation coefficients above 0.99 for both solvent- and matrix-based standard solutions as well as matrix spike recoveries ranging from 49% to 85% in 17 coral reef fish species. Compared with previous methods, this method has better overall recovery, extraction efficiency and LOQ. Fish flesh from 12 blue-spotted groupers (Cephalopholis argus) was assessed for the presence of CTXs using HPLC-MS/MS analysis and the commonly used mouse neuroblastoma assay, and the results of the two methods were strongly correlated. This method is capable of detecting low concentrations of P-CTX-1 in fish at levels that are relevant to human health, making it suitable for monitoring of suspected ciguateric fish both in the environment and in the marketplace.
Similar content being viewed by others
References
Lewis RJ (2006) Toxicon 48:799–809
Gillespie NC, Lewis RJ, Pearn JH, Bourke AT, Holmes MJ, Bourke JB, Shields WJ (1986) Med J Aust 145:584–590
Yasumoto T, Nakajima I, Bagnis R, Adachi R (1977) Bull Jpn Soc Sci Fish 43:1021–1026
Lewis RJ, Holmes MJ (1993) Comp Biochem Physiol C 106:615–628
Pottier I, Vernoux JP, Jones A, Lewis RJ (2002) Food Addit Contam 19:1034–1042
Murata M, Legrand AM, Ishibashi Y, Fukui M, Yasumoto T (1990) J Am Chem Soc 112:4380–4386
Juranovic LR, Park DL (1991) Rev Environ Contam Toxicol 117:51–94
Lehane L, Lewis RJ (2000) Int J Food Microbiol 61:91–125
Hokama Y, Banner AH, Boylan DB (1977) Toxicon 15:317–325
Hokama Y, Takenaka WE, Nishimura KL, Ebesu JS, Bourke R, Sullivan PK (1998) J AOAC Int 81:727–735
Campora CE, Hokama Y, Yabusaki K, Isobe M (2008) J Clin Lab Anal 22:239–245
Manger RL, Leja LS, Lee SY, Hungerford JM, Hokama Y, Dickey RW, Granade HR, Lewis R, Yasumoto T, Wekell MM (1995) J AOAC Int 78:521–527
Lewis RJ, Jones A, Vernoux JP (1999) Anal Chem 71:247–250
Lewis RJ, Yang AJ, Jones A (2009) Toxicon 54:62–66
Lewis RJ, Sellin M (1992) Toxicon 30:915–919
Stewart I, Eaglesham GK, Poole S, Graham G, Paulo C, Wickramasinghe W, Sadler R, Shaw GR (2010) Toxicon 56:804–812
Carabias-Martinez R, Rodriguez-Gonzalo E, Revilla-Ruiz P, Hernandez-Mendez J (2005) J Chromatogr A 1089:1–17
Lewis RJ, Sellin M, Poli MA, Norton RS, MacLeod JK, Sheil MM (1991) Toxicon 29:1115–1127
Hamilton B, Hurbungs M, Vernoux JP, Jones A, Lewis RJ (2002) Toxicon 40:685–693
Wong CK, Hung P, Lee KLH, Kam KM (2005) Toxicon 46:563–571
Draisci R, Marchiafava C, Palleschi L, Cammarata P, Cavalli S (2001) J Chromatogr B Biomed Sci Appl 753:217–223
Poerschmann J, Trommler U, Biedermann W, Truyen U, Lucker E (2006) J Chromatogr A 1127:26–33
Poerschmann J, Carlson R (2006) J Chromatogr A 1127:18–25
Dechraoui MYB, Tiedeken JA, Persad R, Wang ZH, Granade HR, Dickey RW, Ramsdell JS (2005) Toxicon 46:261–270
Acknowledgements
We thank Ms. Rachel P. P. Wong (School of Biological Science, The University of Hong Kong) for identification of fish species and Asia Pacific Application Support Center of AB Sciex for providing 5500 QTRAP and technical assistance. The work described in this paper was fully supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (CityU3/CRF/08).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wu, J.J., Mak, Y.L., Murphy, M.B. et al. Validation of an accelerated solvent extraction liquid chromatography–tandem mass spectrometry method for Pacific ciguatoxin-1 in fish flesh and comparison with the mouse neuroblastoma assay. Anal Bioanal Chem 400, 3165–3175 (2011). https://doi.org/10.1007/s00216-011-4977-4
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00216-011-4977-4