Development and optimization of LC-MS for the identification and confirmation of ciguatoxins

CFP (Ciguatera Fish Poissoning) is a disease associated with the appearance of gastrointestinal and neurological symptoms caused by the consumption of fish contaminated with ciguatoxin (CTX), whose precursors are produced by benthic dinoflagellates of the genus Gambierdiscus. Although these CTXs pro...

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Bibliographic Details
Main Author: Estévez Bastos, Pablo
Other Authors: Gago Martínez, Ana María Consuelo
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: Química analítica e alimentaria 2021
Subjects:
Online Access:http://hdl.handle.net/11093/2247
Description
Summary:CFP (Ciguatera Fish Poissoning) is a disease associated with the appearance of gastrointestinal and neurological symptoms caused by the consumption of fish contaminated with ciguatoxin (CTX), whose precursors are produced by benthic dinoflagellates of the genus Gambierdiscus. Although these CTXs producing species are endemic to coral reefs in the Pacific, Indian and Caribbean marine regions, cases of CFP have recently been confirmed in the Canary Islands and other European regions, in addition to the identification of various species of Gambierdiscus in the North Atlantic, representing an emerging problem for public health in Europe. The lipophilicity of the mentioned toxins coupled with the complexity of the matrix in which they are present necessitates the optimization of efficient extraction and purification steps for the removal of endogenous matrix compounds which would affect the efficiency of the analysis. The PhD thesis will focus on the design and evaluation of effective sample preparation protocols for the analysis of ciguatoxins in contaminated fish. La CFP (Ciguatera Fish Poissoning) es una enfermedad asociada a la aparición de síntomas gastrointestinales y neurológicos provocados por el consumo de peces contaminados con ciguatoxina (CTX), cuyos precursores son producidos por dinoflagelados bentónicos del género Gambierdiscus. Aunque estas especies productoras de CTXs son endémicas de los arrecifes de coral de las regiones marinas del Pacífico, Índico y Caribe, recientemente se ha confirmado casos de CFP en las Islas Canarias y otras regiones europeas, además de haberse identificado diversas especies de Gambierdiscus en el Atlántico Norte, representando un problema emergente para la salud pública en Europa. El carácter lipofílico de las citadas toxinas unido a la complejidad de la matriz en las que se encuentran presentes hace necesario la optimización de etapas de extracción y purificación eficaces para la eliminación de los compuestos endógenos de la matriz que afectarían a la eficacia del ...