Yessotoxin

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Yessotoxin
Yessotoxin.svg
Names
Preferred IUPAC name
(2S,4aS,5aR,6R,6aS,7aR,8S,10aS,11aR,13aS,14aR,15aS,16aR,18S,19R,20aS,21aR,22aS,23aR,24aS,25aR,26aS,27aR,28aS,29aR)-6-Hydroxy-2-[(2R,3E)-2-hydroxy-5-methylidene­octa-3,7-dien-2-yl]-5a,8,10a,11a,19-pentamethyl-3-methylidene-19-[2-(sulfooxy)ethyl]­octatriacontahydro­pyrano­[2′′′,3′′′:5′′,6′′]pyrano­[2′′,3′′:5′,6′]pyrano­[2′,3′:5,6]pyrano­[3,2-b]pyrano­[2′′′′′,3′′′′′:5′′′′,6′′′′]pyrano­[2′′′′,3′′′′:5′′′,6′′′]pyrano­[2′′′,3′′′:5′′,6′′]pyrano­[2′′,3′′:6′,7′]oxepino­[2′,3′:5,6]pyrano­[2,3-g]oxocin-18-yl hydrogen sulfate
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
PubChem CID
UNII
  • InChI=1S/C55H82O21S2/c1-10-11-28(2)12-15-51(5,57)50-30(4)20-39-38(71-50)26-46-55(9,74-39)49(56)48-42(70-46)24-41-47(72-48)29(3)13-16-53(7)44(69-41)27-43-54(8,76-53)17-14-31-32(68-43)21-34-33(65-31)22-35-36(66-34)23-40-37(67-35)25-45(75-78(61,62)63)52(6,73-40)18-19-64-77(58,59)60/h10,12,15,29,31-50,56-57H,1-2,4,11,13-14,16-27H2,3,5-9H3,(H,58,59,60)(H,61,62,63)/b15-12+/t29-,31-,32+,33+,34-,35-,36+,37+,38+,39-,40-,41-,42+,43-,44+,45-,46-,47+,48+,49+,50-,51+,52+,53-,54+,55-/m0/s1
    Key: HCYDZFJGUKMTQB-AVHIVUAZSA-N
  • InChI=1/C55H82O21S2/c1-10-11-28(2)12-15-51(5,57)50-30(4)20-39-38(71-50)26-46-55(9,74-39)49(56)48-42(70-46)24-41-47(72-48)29(3)13-16-53(7)44(69-41)27-43-54(8,76-53)17-14-31-32(68-43)21-34-33(65-31)22-35-36(66-34)23-40-37(67-35)25-45(75-78(61,62)63)52(6,73-40)18-19-64-77(58,59)60/h10,12,15,29,31-50,56-57H,1-2,4,11,13-14,16-27H2,3,5-9H3,(H,58,59,60)(H,61,62,63)/b15-12+/t29-,31-,32+,33+,34-,35-,36+,37+,38+,39-,40-,41-,42+,43-,44+,45-,46-,47+,48+,49+,50-,51+,52+,53-,54+,55-/m0/s1
    Key: HCYDZFJGUKMTQB-AVHIVUAZBJ
  • O=S(=O)(O)O[C@H]4C[C@H]5O[C@H]6C[C@H]7O[C@H]8CC[C@]9(O[C@@]%10(C)CC[C@H](C)[C@H]%11O[C@@H]1[C@H](O[C@H]2C[C@H]3O[C@@H](C(=C)\C[C@@H]3O[C@]2(C)[C@@H]1O)[C@](O)(\C=C\C(=C)C\C=C)C)C[C@@H]%11O[C@@H]%10C[C@@H]9O[C@@H]8C[C@@H]7O[C@@H]6C[C@@H]5O[C@]4(C)CCOS(=O)(=O)O)C
Properties
C55H82O21S2
Molar mass 1143.36 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Yessotoxins are a group of lipophilic, sulfur bearing polyether toxins that are related to ciguatoxins. [1] They are produced by a variety of dinoflagellates, most notably Lingulodinium polyedrum and Gonyaulax spinifera . [2]

Contents

When the environmental conditions encourage the growth of YTX producing dinoflagellates, the toxin(s) bioaccumulate in edible tissues of bivalve molluscs, including mussels, scallops, and clams, thus allowing entry of YTX into the food chain. [3]

History

The first YTX analog discovered, yessotoxin, was initially found in the scallop species Patinopecten yessoensis in the 1960s. [4] Since then, numerous yessotoxin analogs have been isolated from shellfish and marine algae (including 45-hydroxyyessotoxin and carboxyyessotoxin). [1]

Initially, scientists wrongly classified YTXs in the group of diarrhetic shellfish poisoning (DSP) toxins along the lines of okadaic acid and azaspiracids. These type of toxins can cause extreme gastrointestinal upset and accelerate cancer growth. Once scientists realized YTXs did not have the same toxicological mechanism of action as the other toxins (protein phosphatase inhibitors), they were given their own classification. [5]

Toxicity

A large number of studies have been conducted to assess the potential toxicity of YTXs. To date none of these studies has highlighted any toxic effects of YTXs when they are present in humans. They have, however, found YTXs to have toxic effects in mice when the YTX had been administered by an intraperitoneal injection into the animal. The toxicological effects encountered are similar to those seen for paralytic shellfish toxins, and include hepatotoxicity, cardiotoxicity, and neurotoxicity, with a YTX level of 100 μg/kg causing toxic effects. Limited toxic effects have been seen after oral administration of the toxin to animals. The mechanism by which YTX exerts a toxic effect is unknown and is currently being studied by a number of research groups. However, some recent studies suggest the mode of action may have something to do with altering calcium homeostasis. [6] Genotoxicity has been newly reported and confirmed. [7] [8]

Although no data illustrate the direct association of YTXs and toxicity in humans, issues with regards to the potential health risks of YTXs still stand due to the significant animal toxicity observed, and like other algal toxins present within shellfish, YTKs are not destroyed by heating or freezing. [3] As a result, several countries, including New Zealand, Japan, and those in Europe, regulate the levels of YTXs in shellfish. In 2002, the European Commission placed the regulatory level at 1 μg of YTXs per g (1 mg/kg) of shellfish meat intended for human consumption (Directive 20012/225/EC). [2]

Recently, it was shown that yessotoxins can trigger ribotoxic stress. [9]

Analysis

The analysis of YTXs is necessary because of the possible health risks and the limits put in place by the European Commission directive. It is complex due to the large number of YTX analogues that can be present in the sample. Analysis is also problematic because YTXs have similar properties to other lipophilic toxins present in the samples, so methods can be subject to false negative or false positive results due to sample interferences.

Several experimental techniques have been developed to detect YTXs, each offering varying levels of selectivity and sensitivity, whilst having numerous advantages and disadvantages.

Extraction methods

Prior to analysis, YTXs must be isolated from the sample medium whether this is the digestive gland of a shellfish, a water sample, or a growth-culture medium. This can be achieved by several methods:

Liquid–liquid or solvent extraction

Liquid–liquid extraction or solvent extraction can be used to isolate YTXs from the sample medium. Methanol is normally the solvent of choice, but other solvents can also be used including acetone and chloroform. The drawback of using the solvent extraction method is the levels of analyte recovery can be poor, so any results obtained from the quantification processes may not be representative of the sample. [6] [10]

Solid phase extraction

Solid phase extraction also can be used to isolate YTXs from the sample medium. This technique separates the components of a mixture by using their different chemical and physical properties. This method is robust and extremely useful when small sample volumes are being analysed. It is advantageous over solvent extraction, as it concentrates (can give sample enrichment up to the power of 10) and can purify the sample by the removal of salts and nonpolar substances which can interfere with the final analysis. This technique is also beneficial because it gives good levels of YTX recovery — ranging from 40 to 50%. [6] [10]

Analytical techniques

A range of analytical methods can be used to identify and quantify YTXs.

Mouse bioassay

The mouse bioassay (MBA) procedure developed by Yasumoto et al. is the official reference method used to analyse for YTX and lipophilic toxins including okadaic acid, dinophysistoxins (DSPs), azaspiracids, and pectenotoxins.

The MBA involves injecting the extracted toxin into a mouse and monitoring the mouse survival rate; the toxicity of the sample can be subsequently deduced and the analyte concentration determined. This calculation is made on the basis that one mouse unit (MU) is the minimum quantity of toxin needed to kill a mouse in 24hours. The MU is set by regulating bodies at 0.05 MU/g of animal.

The original Yasumoto MBA is subject to interferences from paralytic shellfish toxins and free fatty acids in solution, which cause false positive results. Several modifications to the MBA can be made to allow the test to be performed without these errors.

The MBA, however, still has many drawbacks;

  • The method is a nonspecific assay- it is unable to differentiate between YTX and other sample components, including DSP toxins
  • The method has economic and social issues with regards to testing on animals.
  • The results produced are not very reproducible.
  • The method has insufficient detection capabilities.

The method, though, is quick and inexpensive. Due to these factors, the other, more recently developed, techniques are being preferred for analysis of YTX.[ citation needed ]

Enzyme-linked immunosorbent assay

The enzyme-linked immunosorbent assay (ELISA) technique used for the analysis of YTXs is a recently developed method by Briggs et al. [6] This competitive, indirect immunoassay uses polyclonal antibodies against YTX to determine its concentration in the sample. The assay is commercially available, and is a rapid technique for the analysis of YTXs in shellfish, algal cells, and culture samples.

ELISA has several advantages: it is very sensitive, has a limit of quantification of 75 μg/kg, [11] is relatively cheap, and is easy to carry out. The major disadvantage to this method is it cannot differentiate between the different YTX analogues and takes a long time to generate results. [6]

Chromatographic methods

A variety of chromatographic methods can be used to analyse YTXs. This includes chromatographic techniques coupled to mass spectrometry and fluorescence detectors. All of the chromatographic techniques require a calibration step prior to sample analysis.

Chromatographic methods with fluorescence detection

Liquid chromatography with fluorescence detection (LC-FLD) provides a selective, relatively cheap, reproducible method for the qualitative and quantitative analysis of YTX for shellfish and algae samples. [6] This method requires an additional sample preparation step after the analyte extraction procedure has been completed (in this case SPE is preferentially used so common interferences can be removed from the sample). This additional step involves the derivatization of the YTXs with a fluorescent dienophile reagent — dimethoxy-4-methyl-3-oxo-3,4-dihydroquinoxalinyl)ethyl]-1,2,4-triazoline-3,5-dione, which facilitates analyte detection. This additional sample preparation step can make LC-FLD analysis extremely time-consuming and is a major disadvantage of the technique. [5]

Chromatographic methods coupled to mass spectrometry

This technique is extremely useful for the analysis of multiple toxins. It has numerous advantages over the other techniques used. It is a sensitive and selective analytical method, making it ideal for the analysis of complex samples and those with low analyte concentrations. The method is also beneficial in that it provides important structural information on the analyte which is helpful for aiding analyte identification and when unknown analytes are present in the sample. The technique has benefits over LC-FLD as the derivatisation and purification extraction steps are not necessary. YTX analysis limits of detection of 30 mg/g of shellfish tissue for chromatographic methods coupled to mass spectrometry have been recorded. [12]

The major drawback to LC-MS is that the equipment is very expensive. [6]

Capillary electrophoresis

Capillary electrophoresis (CE)is emerging as the preferred analytical method for YTX analysis, as it has significant advantages over the other analytical techniques used, including high efficiency, a fast and simple separation procedure, a small sample volume required, and minimal reagent is required.

The techniques used for YTX analysis include: CE with ultraviolet (UV) detection and CE coupled to mass spectrometry (MS). CEUV is a good method for YTX analysis, as its selectivity can easily differentiate between YTXs and DSP toxins. The sensitivity of these techniques can, however, be poor due to the low molar absorptivity of the analytes. The technique gives a limit of detection (LOD) of 0.3 μg/ml and a limit of quantification (LOQ)of 0.9 μg/ml. The sensitivity of conventional CEUV can be improved by using micellar electrokinetic chromatography (MEKC).

CEMS has the added advantage over CEUV of being able to give molecular weight and/or structural information about the analyte. This enables the user to carry out unequivocal confirmations of the analytes present in the sample. The LOD and the LOQ have been calculated as 0.02 μg/ml and 0.08 μg/ml, respectively, again meeting the European Commission directive. [5]

See also

Related Research Articles

In chemical analysis, chromatography is a laboratory technique for the separation of a mixture into its components. The mixture is dissolved in a fluid solvent called the mobile phase, which carries it through a system on which a material called the stationary phase is fixed. Because the different constituents of the mixture tend to have different affinities for the stationary phase and are retained for different lengths of time depending on their interactions with its surface sites, the constituents travel at different apparent velocities in the mobile fluid, causing them to separate. The separation is based on the differential partitioning between the mobile and the stationary phases. Subtle differences in a compound's partition coefficient result in differential retention on the stationary phase and thus affect the separation.

<span class="mw-page-title-main">High-performance liquid chromatography</span> Technique in analytical chemistry

High-performance liquid chromatography (HPLC), formerly referred to as high-pressure liquid chromatography, is a technique in analytical chemistry used to separate, identify, and quantify specific components in mixtures. The mixtures can originate from food, chemicals, pharmaceuticals, biological, environmental and agriculture, etc, which have been dissolved into liquid solutions.

<span class="mw-page-title-main">Electron ionization</span> Ionization technique

Electron ionization is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions. EI was one of the first ionization techniques developed for mass spectrometry. However, this method is still a popular ionization technique. This technique is considered a hard ionization method, since it uses highly energetic electrons to produce ions. This leads to extensive fragmentation, which can be helpful for structure determination of unknown compounds. EI is the most useful for organic compounds which have a molecular weight below 600. Also, several other thermally stable and volatile compounds in solid, liquid and gas states can be detected with the use of this technique when coupled with various separation methods.

<span class="mw-page-title-main">Gas chromatography–mass spectrometry</span> Analytical method

Gas chromatography–mass spectrometry (GC–MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. Applications of GC–MS include drug detection, fire investigation, environmental analysis, explosives investigation, food and flavor analysis, and identification of unknown samples, including that of material samples obtained from planet Mars during probe missions as early as the 1970s. GC–MS can also be used in airport security to detect substances in luggage or on human beings. Additionally, it can identify trace elements in materials that were previously thought to have disintegrated beyond identification. Like liquid chromatography–mass spectrometry, it allows analysis and detection even of tiny amounts of a substance.

<span class="mw-page-title-main">Lipidomics</span>

Lipidomics is the large-scale study of pathways and networks of cellular lipids in biological systems The word "lipidome" is used to describe the complete lipid profile within a cell, tissue, organism, or ecosystem and is a subset of the "metabolome" which also includes other major classes of biological molecules. Lipidomics is a relatively recent research field that has been driven by rapid advances in technologies such as mass spectrometry (MS), nuclear magnetic resonance (NMR) spectroscopy, fluorescence spectroscopy, dual polarisation interferometry and computational methods, coupled with the recognition of the role of lipids in many metabolic diseases such as obesity, atherosclerosis, stroke, hypertension and diabetes. This rapidly expanding field complements the huge progress made in genomics and proteomics, all of which constitute the family of systems biology.

<span class="mw-page-title-main">Metabolomics</span> Scientific study of chemical processes involving metabolites

Metabolomics is the scientific study of chemical processes involving metabolites, the small molecule substrates, intermediates, and products of cell metabolism. Specifically, metabolomics is the "systematic study of the unique chemical fingerprints that specific cellular processes leave behind", the study of their small-molecule metabolite profiles. The metabolome represents the complete set of metabolites in a biological cell, tissue, organ, or organism, which are the end products of cellular processes. Messenger RNA (mRNA), gene expression data, and proteomic analyses reveal the set of gene products being produced in the cell, data that represents one aspect of cellular function. Conversely, metabolic profiling can give an instantaneous snapshot of the physiology of that cell, and thus, metabolomics provides a direct "functional readout of the physiological state" of an organism. There are indeed quantifiable correlations between the metabolome and the other cellular ensembles, which can be used to predict metabolite abundances in biological samples from, for example mRNA abundances. One of the ultimate challenges of systems biology is to integrate metabolomics with all other -omics information to provide a better understanding of cellular biology.

<span class="mw-page-title-main">Atmospheric-pressure chemical ionization</span> Ionization method

Atmospheric pressure chemical ionization (APCI) is an ionization method used in mass spectrometry which utilizes gas-phase ion-molecule reactions at atmospheric pressure (105 Pa), commonly coupled with high-performance liquid chromatography (HPLC). APCI is a soft ionization method similar to chemical ionization where primary ions are produced on a solvent spray. The main usage of APCI is for polar and relatively less polar thermally stable compounds with molecular weight less than 1500 Da. The application of APCI with HPLC has gained a large popularity in trace analysis detection such as steroids, pesticides and also in pharmacology for drug metabolites.

Solid phase microextraction, or SPME, is a solid phase extraction sampling technique that involves the use of a fiber coated with an extracting phase, that can be a liquid (polymer) or a solid (sorbent), which extracts different kinds of analytes from different kinds of media, that can be in liquid or gas phase. The quantity of analyte extracted by the fibre is proportional to its concentration in the sample as long as equilibrium is reached or, in case of short time pre-equilibrium, with help of convection or agitation.

Reversed-phase liquid chromatography (RP-LC) is a mode of liquid chromatography in which non-polar stationary phase and polar mobile phases are used for the separation of organic compounds. The vast majority of separations and analyses using high-performance liquid chromatography (HPLC) in recent years are done using the reversed phase mode. In the reversed phase mode, the sample components are retained in the system the more hydrophobic they are.

<span class="mw-page-title-main">Hydrophilic interaction chromatography</span> Type of chromatography

Hydrophilic interaction chromatography is a variant of normal phase liquid chromatography that partly overlaps with other chromatographic applications such as ion chromatography and reversed phase liquid chromatography. HILIC uses hydrophilic stationary phases with reversed-phase type eluents. The name was suggested by Andrew Alpert in his 1990 paper on the subject. He described the chromatographic mechanism for it as liquid-liquid partition chromatography where analytes elute in order of increasing polarity, a conclusion supported by a review and re-evaluation of published data.

Surface-enhanced laser desorption/ionization (SELDI) is a soft ionization method in mass spectrometry (MS) used for the analysis of protein mixtures. It is a variation of matrix-assisted laser desorption/ionization (MALDI). In MALDI, the sample is mixed with a matrix material and applied to a metal plate before irradiation by a laser, whereas in SELDI, proteins of interest in a sample become bound to a surface before MS analysis. The sample surface is a key component in the purification, desorption, and ionization of the sample. SELDI is typically used with time-of-flight (TOF) mass spectrometers and is used to detect proteins in tissue samples, blood, urine, or other clinical samples, however, SELDI technology can potentially be used in any application by simply modifying the sample surface.

<span class="mw-page-title-main">Thermospray</span>

Thermospray is a soft ionization source by which a solvent flow of liquid sample passes through a very thin heated column to become a spray of fine liquid droplets. As a form of atmospheric pressure ionization in mass spectrometry these droplets are then ionized via a low-current discharge electrode to create a solvent ion plasma. A repeller then directs these charged particles through the skimmer and acceleration region to introduce the aerosolized sample to a mass spectrometer. It is particularly useful in liquid chromatography-mass spectrometry (LC-MS).

<span class="mw-page-title-main">Desorption electrospray ionization</span>

Desorption electrospray ionization (DESI) is an ambient ionization technique that can be coupled to mass spectrometry (MS) for chemical analysis of samples at atmospheric conditions. Coupled ionization sources-MS systems are popular in chemical analysis because the individual capabilities of various sources combined with different MS systems allow for chemical determinations of samples. DESI employs a fast-moving charged solvent stream, at an angle relative to the sample surface, to extract analytes from the surfaces and propel the secondary ions toward the mass analyzer. This tandem technique can be used to analyze forensics analyses, pharmaceuticals, plant tissues, fruits, intact biological tissues, enzyme-substrate complexes, metabolites and polymers. Therefore, DESI-MS may be applied in a wide variety of sectors including food and drug administration, pharmaceuticals, environmental monitoring, and biotechnology.

Sample preparation for mass spectrometry is used for the optimization of a sample for analysis in a mass spectrometer (MS). Each ionization method has certain factors that must be considered for that method to be successful, such as volume, concentration, sample phase, and composition of the analyte solution. Quite possibly the most important consideration in sample preparation is knowing what phase the sample must be in for analysis to be successful. In some cases the analyte itself must be purified before entering the ion source. In other situations, the matrix, or everything in the solution surrounding the analyte, is the most important factor to consider and adjust. Often, sample preparation itself for mass spectrometry can be avoided by coupling mass spectrometry to a chromatography method, or some other form of separation before entering the mass spectrometer. In some cases, the analyte itself must be adjusted so that analysis is possible, such as in protein mass spectrometry, where usually the protein of interest is cleaved into peptides before analysis, either by in-gel digestion or by proteolysis in solution.

<span class="mw-page-title-main">Two-dimensional chromatography</span>

Two-dimensional chromatography is a type of chromatographic technique in which the injected sample is separated by passing through two different separation stages. Two different chromatographic columns are connected in sequence, and the effluent from the first system is transferred onto the second column. Typically the second column has a different separation mechanism, so that bands that are poorly resolved from the first column may be completely separated in the second column. Alternately, the two columns might run at different temperatures. During the second stage of separation the rate at which the separation occurs must be faster than the first stage, since there is still only a single detector. The plane surface is amenable to sequential development in two directions using two different solvents.

<span class="mw-page-title-main">High-performance thin-layer chromatography</span> Advanced technique to separate non-volatile substances

High-performance thin-layer chromatography (HPTLC) serves as an extension of thin-layer chromatography (TLC), offering robustness, simplicity, speed, and efficiency in the quantitative analysis of compounds. This TLC-based analytical technique enhances compound resolution for quantitative analysis. Some of these improvements involve employing higher-quality TLC plates with finer particle sizes in the stationary phase, leading to improved resolution. Additionally, the separation can be further refined through repeated plate development using a multiple development device. As a result, HPTLC provides superior resolution and lower Limit of Detection (LODs).

<span class="mw-page-title-main">Desorption atmospheric pressure photoionization</span>

Desorption atmospheric pressure photoionization (DAPPI) is an ambient ionization technique for mass spectrometry that uses hot solvent vapor for desorption in conjunction with photoionization. Ambient Ionization techniques allow for direct analysis of samples without pretreatment. The direct analysis technique, such as DAPPI, eliminates the extraction steps seen in most nontraditional samples. DAPPI can be used to analyze bulkier samples, such as, tablets, powders, resins, plants, and tissues. The first step of this technique utilizes a jet of hot solvent vapor. The hot jet thermally desorbs the sample from a surface. The vaporized sample is then ionized by the vacuum ultraviolet light and consequently sampled into a mass spectrometer. DAPPI can detect a range of both polar and non-polar compounds, but is most sensitive when analyzing neutral or non-polar compounds. This technique also offers a selective and soft ionization for highly conjugated compounds.

<span class="mw-page-title-main">Azaspiracid</span> Chemical compound

Azaspiracids (AZA) are a group of polycyclic ether marine algal toxins produced by the small dinoflagellate Azadinium spinosum that can accumulate in shellfish and thereby cause illness in humans.

Ion suppression in LC-MS and LC-MS/MS refers to reduced detector response, or signal:noise as a manifested effect of competition for ionisation efficiency in the ionisation source, between the analyte(s) of interest and other endogenous or exogenous species which have not been removed from the sample matrix during sample preparation. Ion suppression is not strictly a problem unless interfering compounds elute at the same time as the analyte of interest. In cases where ion suppressing species do co-elute with an analyte, the effects on the important analytical parameters including precision, accuracy and limit of detection can be extensive, severely limiting the validity of an assay's results.

<span class="mw-page-title-main">Atmospheric pressure photoionization</span> Soft ionization method

Atmospheric pressure photoionization (APPI) is a soft ionization method used in mass spectrometry (MS) usually coupled to liquid chromatography (LC). Molecules are ionized using a vacuum ultraviolet (VUV) light source operating at atmospheric pressure, either by direct absorption followed by electron ejection or through ionization of a dopant molecule that leads to chemical ionization of target molecules. The sample is usually a solvent spray that is vaporized by nebulization and heat. The benefit of APPI is that it ionizes molecules across a broad range of polarity and is particularly useful for ionization of low polarity molecules for which other popular ionization methods such as electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) are less suitable. It is also less prone to ion suppression and matrix effects compared to ESI and APCI and typically has a wide linear dynamic range. The application of APPI with LC/MS is commonly used for analysis of petroleum compounds, pesticides, steroids, and drug metabolites lacking polar functional groups and is being extensively deployed for ambient ionization particularly for explosives detection in security applications.

References

  1. 1 2 A. Tubaro; V. Dell'Ovo; S. Sosa; C. Florio (2010). "Yessotoxins: A Toxicological Overview". Toxicon. 56 (2): 163–172. doi:10.1016/j.toxicon.2009.07.038. PMID   19660487.
  2. 1 2 M. D. A. Howard; M. Silver; R. M. Kudela (2008). "Yessotoxin detected in mussel (Mytilus californicus) and phytoplankton samples from the U.S. west coast". Harmful Algae. 7 (5): 646–652. doi:10.1016/j.hal.2008.01.003.
  3. 1 2 "Marine biotoxins in shellfish – Summary on regulated marine biotoxins" (pdf). Scientific opinion of the Panel on Contaminants in the Food Chain. European Food Safety Authority. 13 August 2009. Question No EFSA-Q-2009-00685.
  4. ↑ M. Murata; M. Kumagi; J. S. Lee; T. Yasumoto (1987). "Isolation and Structure of Yessotoxin, a Novel Polyether Compound Implicated in Diarrhetic Shellfish Poisoning". Tetrahedron Letters. 28 (47): 5869–5872. doi:10.1016/S0040-4039(01)81076-5.
  5. 1 2 3 P. de la Iglesia; A. Gago-Martinez; T. Yasumoto (2007). "Advanced studies for the application of high-performance capillary electrophoresis for the analysis of yessotoxin and 45-hydroxyyessotoxin". Journal of Chromatography A. 1156 (1–2): 160–166. doi:10.1016/j.chroma.2006.12.084. PMID   17239891.
  6. 1 2 3 4 5 6 7 B. Paz; A. H. Daranas; M. Norte; P. Riobo; J. M. Franco; J. J. Fernandez (2008). "Yessotoxins, a group of marine polyether toxins; an overview". Marine Drugs. 6 (2): 73–102. doi: 10.3390/md6020073 . PMC   2525482 . PMID   18728761.
  7. ↑ Korsnes, Mónica S.; Korsnes, Reinert (2017). "Mitotic Catastrophe in BC3H1 Cells following Yessotoxin Exposure". Frontiers in Cell and Developmental Biology. 5: 30. doi: 10.3389/fcell.2017.00030 . PMC   5374163 . PMID   28409150.
  8. ↑ Korsnes, Mónica S.; Korsnes, Reinert (2018). "Single-Cell Tracking of A549 Lung Cancer Cells Exposed to a Marine Toxin Reveals Correlations in Pedigree Tree Profiles". Frontiers in Oncology. 8: 260. doi: 10.3389/fonc.2018.00260 . PMC   6039982 . PMID   30023341.
  9. ↑ Suárez Korsnes, Mónica; Skogtvedt Røed, Susan; Tranulis, Michael A.; Espenes, Arild; Christophersen, Berit (2014). "Yessotoxin triggers ribotoxic stress". Toxicology in Vitro. 28 (5): 975–981. doi: 10.1016/j.tiv.2014.04.013 . hdl: 11250/2574125 . PMID   24780217.
  10. 1 2 A. These; J. Scholz; A. Preiss-Weigert (2009). "Sensitive method for the determination if lipophilic marine biotoxins in extracts of mussels and processed shellfish by high-performance liquid chromatography-tandem mass spectrometry based on enrichment by solid-phase extraction". Journal of Chromatography A. 1216 (21): 4529–4538. doi:10.1016/j.chroma.2009.03.062. PMID   19362722.
  11. ↑ L. R. Briggs; C. O. Miles; J. M. Fitzgerald; K. M. Ross; I. Garthwaite; N. R. Towers (2004). "Enzyme-linked immunosorbent assay for the detection of yessotoxin and its analogues". J. Agric. Food Chem. 52 (19): 5836–5842. doi:10.1021/jf049395m. PMID   15366829.
  12. ↑ M. Fernández Amandi; A. Furey; M. Lehane; H. Ramstad; K. J. James (2002). "Liquid chromatography with electrospray ion-trap mass spectrometry for the determination of yessotoxins in shellfish". Journal of Chromatography A. 976 (1–2): 329–334. doi:10.1016/S0021-9673(02)00946-9. PMID   12462625.

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