Ingestion of Hijiki seaweed and risk of arsenic poisoning

Nakajima, Yoshiaki; Endo, Yuichi; Inoue, Yasuhiro; Yamanaka, Kazuhiro; Kato, Koichi; Wanibuchi, Hideki; Endo, Ginji

doi:10.1002/aoc.1085

Cited by 25 publications

(21 citation statements)

References 48 publications

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“…Low concentrations of selenium can cause anomalies in organisms while high concentrations are toxic. For inorganic As, the values were similar to those found elsewhere (Nakajima et al 2006;Tuzen et al 2009). Moreover, the bioavailability of inorganic As may also be affected by the high fiber content in algae.…”

Section: Proximate Composition and Mineralssupporting

confidence: 90%

Minerals, PUFAs and antioxidant properties of some tropical seaweeds from Saurashtra coast of India

et al. 2010

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Twenty-two tropical seaweeds from the Rhodophyta, Phaeophyta and Chlorophyta were examined for their possible use as nutritional supplements. All seaweeds contained balanced Na/K and C/N ratio and high amounts of macroelements (Na, K, Ca, and Mg) as compared to the terrestrial vegetables. Among the microelements, Fe was the highest followed by Zn, Mn, Cu and other trace elements. Fatty acid distribution showed high level of n-6 and n-3 polyunsaturated fatty acids (PUFAs), and their ratios were within the WHO prescribed limits. The higher ratios of PUFA/SFA (>0.4) are in agreement with the recommendations of nutritional guidelines. Most of the species, especially the Chlorophyta and Phaeophyta, had permissible intake values of unsaturation, atherogenic and thrombogenic indexes comparable to milk-based products. Principal component analysis demonstrated a correlation between total phenolic content, total antioxidant activity, DPPH, and O 2 •− radical scavenging activity, suggesting polyphenols as the chief contributor to the antioxidant activity in seaweeds. These results indicate that these seaweeds could be a potential source of natural antioxidants, minerals and high-quality PUFAs and may be efficiently used as ingredients in functional foods.

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Section: Proximate Composition and Mineralssupporting

confidence: 90%

Minerals, PUFAs and antioxidant properties of some tropical seaweeds from Saurashtra coast of India

et al. 2010

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“…This analytical procedure was validated using certified reference urine for internal quality control (NIES CRM No. 18 Human Urine; National Institute for Environmental Studies, Japan) and by using the external quality assessment program of the German External Quality Assessment Scheme (Institute of Occupational Social and Environmental Medicine of the University of Erlangen, Nuremberg, Germany) as described in our previous reports [17,18].…”

Section: Analytical Conditionsmentioning

confidence: 99%

Arsenic speciation analysis of urine samples from individuals living in an arsenic-contaminated area in Bangladesh

Hata

Yamanaka

Habib

et al. 2011

Environ Health Prev Med

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Objectives Chronic inorganic arsenic (iAs) exposure currently affects tens of millions of people worldwide. To accurately determine the proportion of urinary arsenic metabolites in residents continuously exposed to iAs, we performed arsenic speciation analysis of the urine of these individuals and determined whether a correlation exists between the concentration of iAs in drinking water and the urinary arsenic species content. Methods The subjects were 165 married couples who had lived in the Pabna District in Bangladesh for more than 5 years. Arsenic species were measured using high-performance liquid chromatography and inductively coupled plasma mass spectrometry. Results The median iAs concentration in drinking water was 55 lgAs/L (range \0.5-332 lgAs/L). Speciation analysis revealed the presence of arsenite, arsenate, monomethylarsonic acid (MMA), and dimethylarsinic acid in urine samples with medians (range) of 16.8 (7.7-32.3), 1.8 (\0.5-3.3), 13.7 (5.6-25.0), and 88.6 lgAs/L (47.9-153.4 lgAs/L), respectively. No arsenobetaine or arsenocholine was detected. The concentrations of the 4 urinary arsenic species were significantly and linearly related to each other. The urinary concentrations of total arsenic and each species were significantly correlated with the iAs concentration of drinking water. Conclusions All urinary arsenic species are well correlated with each other and with iAs in drinking water. The most significant linear relationship existed between the iAs concentration in drinking water and urinary iAs ? MMA concentration. From these results, combined with the effects of seafood ingestion, the best biomarker of iAs exposure is urinary iAs ? MMA concentration.

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“…Marine plants, particularly algae, are known to accumulate high arsenic contents [6,7]. As primary producers, phytoplankton and marine macroalgae accumulate inorganic arsenic and biotransform them into complex organic molecules that are either water-or lipid-soluble arsenic compounds.…”

Section: Introductionmentioning

confidence: 99%

Closed Anaerobic Biotransformation Products of Organoarsenic Compounds inFucus distichus

Ojo

Onasanya

2013

ISRN Environmental Chemistry

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The closed anaerobic decomposition extracts of Fucus distichus incubated with seawater and sediment, and without sediment as control, were subjected to extractions and isolation on Sephadex LH 20 and Cellulose Thin Layer Chromatography. The decomposition extracts and isolates were analyzed by using both the Hydride Generation Gas Chromatography Atomic Absorption Spectrometry (HG-GC-AAS) and High Performance Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry (HPLC-ICPMS) to identify the arsenic species in the equilibrium mixtures of the seaweed and filtrates separately. In the methanol seaweed extract, equilibrium mixture of arsenosugars (AS) AS1 and AS2 and their biotransformation products of dimethylarsinoylethanol (DMAE) and dimethylarsinic acid (DMAA) were identified. In the methanol filtrate extract of the mixture, only DMAE and DMAA were identified. However, in the control methanol filtrate extract five organoarsenic species, AS1 and AS2, one unidentified hidden organoarsenic species, DMAE and DMAA were identified in the equilibrium mixture. This result confirmed that the hidden organoarsenic species in Fucus distichus, AS1 and AS2, and an unidentified organoarsenic compounds are biotransformed to only DMAE and DMAA under an anaerobic condition. This also suggests that DMAE and DMAA are strong intermediate candidates for the generation of arsenobetaine, from arsenoribosides in the marine food webs.

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Ingestion of Hijiki seaweed and risk of arsenic poisoning

Cited by 25 publications

References 48 publications

Minerals, PUFAs and antioxidant properties of some tropical seaweeds from Saurashtra coast of India

Minerals, PUFAs and antioxidant properties of some tropical seaweeds from Saurashtra coast of India

Arsenic speciation analysis of urine samples from individuals living in an arsenic-contaminated area in Bangladesh

Closed Anaerobic Biotransformation Products of Organoarsenic Compounds inFucus distichus

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