@article {797,
	title = {Do arsenosugars pose a risk to human health? The comparative toxicities of a trivalent and pentavalent arsenosugar},
	journal = {Environmental Science \& Technology},
	volume = {38},
	number = {15},
	year = {2004},
	note = {ISI Document Delivery No.: 842WOTimes Cited: 23Cited Reference Count: 54},
	month = {Aug},
	pages = {4140-4148},
	type = {Article},
	abstract = {Seafood frequently contains high concentrations of arsenic (similar to10-100 mg/kg dry weight). In marine algae (seaweed), this arsenic occurs predominantly as ribose derivatives known collectively as arsenosugars. Although it is clear that arsenosugars are not acutely toxic, there is a possibility of arsenosugars having slight chronic toxicity. In general, trivalent arsenicals are more toxic than their pentavalent counterparts, so in this work we examine the hypothesis that trivalent arsenosugars might be significantly more toxic than pentavalent arsenosugars in vitro. We compared the in vitro toxicity of (R)-2,3-dihydroxypropyl-5-deoxy-5-dimethylarsinoyl-beta-D-riboside, a pentavalent arsenosugar, to that of its trivalent counterpart, (R)-2,3-dihydroxypropyl-5-deoxy-5-dimethylarsino-beta-D- riboside. The trivalent arsenosugar nicked plasmid DNA, whereas the pentavalent arsenosugar did not. The trivalent arsenosugar was more cytotoxic (IC50 = 200 muM, 48 h exposure) than its pentavalent counterpart (IC50 > 6000 muM, 48 h exposure) in normal human epidermal keratinocytes in vitro as determined via the neutral red uptake assay. However, both the trivalent and the pentavalent arsenosugars were significantly less toxic than MMA(III), DMA(III), and arsenate. Neither the pentavalent arsenosugar nor the trivalent arsenosugar were mutagenic in Salmonella TA104. The trivalent arsenosugar was readily formed by reaction of the pentavalent arsenosugar with thiol compounds, including, cysteine, glutathione, and dithioerythritol. This work suggests that the reduction of pentavalent arsenosugars to trivalent arsenosugars in biology might have environmental consequences, especially because seaweed consumption is a significant environmental source for human exposure to arsenicals.},
	keywords = {DIMETHYLARSINIC ACID, DNA-DAMAGE, HUMAN-CELLS, IN-VITRO, INORGANIC ARSENICS, METABOLISM, METHYLATED ARSENICALS, MONOMETHYLARSONOUS ACID MMA(III), ORGANIC ARSENIC COMPOUNDS, SEAWEED},
	isbn = {0013-936X},
	url = {<Go to ISI>://000223035400022},
	author = {Andrewes, P. and Demarini, D. M. and Funasaka, K. and Wallace, K. and Lai, V. W. M. and Sun, H. S. and Cullen, W. R. and Kitchin, K. T.}
}
@article {4593,
	title = {Arsenic speciation in scallops},
	journal = {Marine Chemistry},
	volume = {66},
	number = {1-2},
	year = {1999},
	note = {ISI Document Delivery No.: 214FQTimes Cited: 42Cited Reference Count: 33},
	month = {Jul},
	pages = {81-89},
	type = {Article},
	abstract = {The arsenic species present in the muscle and the gonad of scallops collected near Newfoundland were characterized by using high performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS). The adductor muscle of the scallops (2.1-9.4 mu g As g(-1)) contains arsenobetaine (AsB) as the major water-soluble arsenic compound. The gonads of the scallops (7.3-44.1 mu g As g(-1)) contain dimethylarsinoylriboside derivatives as the major arsenic compound, as well as lower amounts of AsB. No inorganic arsenic species was detected in the sample extracts indicating that consumption of the scallops poses little human risk. (C) 1999 Elsevier Science B.V. All rights reserved.},
	keywords = {arsenic, arsenobetaine, arsenosugar, CONTAINING RIBOFURANOSIDES, HPLC, ICP-MS, IDENTIFICATION, SAMPLES, scallops, SEAWEED, SPECIATION},
	isbn = {0304-4203},
	url = {<Go to ISI>://000081318300004},
	author = {Lai, V. W. M. and Cullen, W. R. and Ray, S.}
}
@article {4043,
	title = {The characterization of arsenosugars in commercially available algal products including a Nostoc species of terrestrial origin},
	journal = {Applied Organometallic Chemistry},
	volume = {11},
	number = {10-11},
	year = {1997},
	note = {ISI Document Delivery No.: YB269Times Cited: 77Cited Reference Count: 28},
	month = {Oct-Nov},
	pages = {797-803},
	type = {Article},
	abstract = {The arsenic species present in a range of commercially available dried-algal food products were characterized by HPLC-ICP-MS, The products of marine origin contain up to four dimethylarsinylribosides (1) in the 8-49 ppm range and some also contain dimethylarsinic acid (DMAA). These species are easily extracted and account for most of the arsenic burden. One sample of a freshwater alga Nostoc sp, was found to contain a lower concentration of arsenic, 3 ppm, and only 34\% of this was extractable, The extract representing 1 ppm of arsenic contained one of the arsenosugars 1 found in the marine samples (93\%), the rest being DMAA, This is the first report of the identification of an arsenosugar from an organism of terrestrial origin, The implications of this result in connection with the global arsenic cycle are discussed. (C) 1997 John Wiley \& Sons, Ltd.},
	keywords = {(ICP-MS), ACID, ALGAE, arsenic, ARSENIC-CONTAINING RIBOFURANOSIDES, arsenobetaine, arsenosugar, ATOMIC-ABSORPTION SPECTROMETRY, chromatography (HPLC), high-performance liquid, IDENTIFICATION, inductively coupled plasma-mass spectrometry, SEAWEED, SPECIATION},
	isbn = {0268-2605},
	url = {<Go to ISI>://A1997YB26900005},
	author = {Lai, V. W. M. and Cullen, W. R. and Harrington, C. F. and Reimer, K. J.}
}
@article {3987,
	title = {The identification of some water-soluble arsenic species in the marine brown algae Fucus distichus},
	journal = {Applied Organometallic Chemistry},
	volume = {11},
	number = {12},
	year = {1997},
	note = {ISI Document Delivery No.: YL564Times Cited: 18Cited Reference Count: 17},
	month = {Dec},
	pages = {931-940},
	type = {Article},
	abstract = {The extraction and clean-up procedures developed to isolate the water-soluble arsenic species present in the marine macroalga Fucus distichus, from British Columbia, Canada, are described, The arsenic species were extracted into methanol and then subjected to gel-permeation and ion-exchange chromatography, Fractions high in arsenic were identified by using graphite furnace atomic absorption spectroscopy (GF-AAS), and further investigated by using high-performance liquid chromatography coupled to inductively coupled plasma-mass spectrometry (HPLC-ICP MS), By using different HPLC columns and mobile-phase conditions, the four major arsenic-containing compounds present in the macroalga were positively identified as arsenosugars; one minor compound remained unidentified. (C) 1997 John Wiley \& Sons, Ltd.},
	keywords = {(ICP MS), arsenic, arsenosugars, ATOMIC-ABSORPTION SPECTROMETRY, chromatography (HPLC), CONTAINING RIBOFURANOSIDES, Fucus distichus, high-performance liquid, HPLC-ICP MS, inductively coupled plasma mass spectrometry, SEAWEED},
	isbn = {0268-2605},
	url = {<Go to ISI>://A1997YL56400001},
	author = {Harrington, C. F. and Ojo, A. A. and Lai, V. W. M. and Reimer, K. J. and Cullen, W. R.}
}
@article {3093,
	title = {HUMAN URINARY ARSENIC EXCRETION AFTER ONE-TIME INGESTION OF SEAWEED, CRAB, AND SHRIMP},
	journal = {Clinical Chemistry},
	volume = {40},
	number = {4},
	year = {1994},
	note = {ISI Document Delivery No.: NE582Times Cited: 145Cited Reference Count: 48},
	month = {Apr},
	pages = {617-624},
	type = {Article},
	abstract = {We studied chemical speciation of arsenic compounds in urine samples by using HPLC with inductively coupled plasma mass spectrometry detection. We examined urinary arsenic excretion patterns and the arsenic species excreted from nine human subjects who ingested seaweed products and crab (or shrimp). Fast urinary excretion of unchanged arsenobetaine was seen after ingestion of crab and shrimp, which contain arsenobetaine as the major arsenic species. In contrast, the arsenosugars, which comprise the major arsenic species in seaweed, are metabolized and have a longer retention time in the human body. When nine volunteers ingested the commercial seaweed product nori, both the urinary arsenic excretion pattern and the excreted arsenic species varied from individual to individual, and as many as six metabolites could be detected. It seems that arsenosugars are not decomposed by stomach acid and that reactions involving enzymatic and (or) microbial activity in the human body may be responsible for the metabolism of arsenosugars.},
	keywords = {arsenobetaine, arsenosugars, ATOMIC-ABSORPTION SPECTROMETRY, EDIBLE, HAMSTER, JAPANESE, METABOLISM, ORGANOARSENIC COMPOUNDS, PLASMA, RABBITS, SEAWEED, SPECIATION, TOXICOLOGY},
	isbn = {0009-9147},
	url = {<Go to ISI>://A1994NE58200023},
	author = {Le, X. C. and Cullen, W. R. and Reimer, K. J.}
}
