Effects of Hair Treatment on Hair Mercury—The Best Biomarker of Methylmercury Exposure?

Dakeishi, Miwako; Nakai, Kunihiko; Sakamoto, Mineshi; Iwata, Tetsu; Suzuki, Keita; Liu, Xiaojie; Ohno, Tomoko; Kurosawa, Tomoko; Satoh, Hiroshi; Murata, Katsuyuki

doi:10.1265/ehpm.10.208

Cited by 7 publications

(10 citation statements)

References 16 publications

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“…Cord-blood T-Hg and MeHg concentrations are relatively higher than the maternal-blood concentrations at parturition, and the cord blood-tomaternal blood ratios among mother-child pairs have high variability. Also, artifi cial hair-waving reduces about 30% of mercury in hair (Yamamoto and Suzuki 1978;Iwasaki et al 2003;Yasutake et al 2003;Dakeishi et al 2005;Ohno et al 2007). In addition, the increased cord mercury concentration was associated with a couple of neurobehavioral and neurophysiological defi cits in children.…”

Section: Discussionmentioning

confidence: 99%

“…Then, the conversion of inorganic mercury to MeHg occurs primarily in microorganisms especially in aquatic systems, and MeHg is rapidly accumulated by most aquatic biota and attains its highest concentration in the tissues of fi sh at the top of the aquatic food chain (e.g., tuna, shark, and swordfi sh). Of course, the principal source of human exposure to MeHg is fi sh consumption (Grandjean et al 1992;Dakeishi et al 2005;Ohno et al 2007). However, whether the secular trends of MeHg intake in industrialized countries are similar to the decreasing trend in arctic inhabitants (Dallaire et al 2003) remains unclear.…”

Section: Temporal Perspective Of Cord Mercury Concentrationsmentioning

confidence: 99%

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Assessment of Intrauterine Methylmercury Exposure Affecting Child Development: Messages from the Newborn

Murata

Dakeishi

Shimada

et al. 2007

Tohoku J. Exp. Med.

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Section: Discussionmentioning

confidence: 99%

Section: Temporal Perspective Of Cord Mercury Concentrationsmentioning

confidence: 99%

Assessment of Intrauterine Methylmercury Exposure Affecting Child Development: Messages from the Newborn

Murata

Dakeishi

Shimada

et al. 2007

Tohoku J. Exp. Med.

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“…It has been reported that permanent waving decreases the mercury concentration in hair (19,20) , but Ohba et al (21) reported that the average mercury concentration of 3-cm segments of hair from the proximal end showed no significant decrease by permanent waving. In our cohort, 21?2 % of the subjects had permanent waving or straightening.…”

Section: Determination Of Total Mercury In Biological Samplesmentioning

confidence: 99%

Assessment of exposure to methylmercury in pregnant Japanese women by FFQ

Yaginuma-Sakurai

Shimada

Ohba

et al. 2009

Public Health Nutr.

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Objective: To examine whether an FFQ can be used for assessing exposure to methylmercury (MeHg) by estimating MeHg intake from seafood consumption using the FFQ and confirming the accuracy of the estimated value. Design: Seafood consumption of pregnant women was assessed using the FFQ. Total mercury (T-Hg) concentrations of maternal red blood cells (RBC) and hair were measured as exposure indices of MeHg. Setting: A prospective birth cohort study, the Tohoku Study of Child Development (TSCD), which has been ongoing since 2001. Subjects: The subjects were 609 pregnant Japanese women who were enrolled in the TSCD. Results: MeHg intake was estimated from seafood consumption determined using the FFQ and the MeHg concentrations in each type of seafood. The accuracy of the estimated value was confirmed by comparison with T-Hg in RBC and hair. Estimated MeHg intake was 42?3 mg/week, and 43?0 % of that was from large predatory fish. Compared with the Japanese tolerable weekly intake, in total 12?5 % of the subjects exceeded it. T-Hg concentrations in RBC and hair were significantly correlated with estimated MeHg intake: r 5 0?325 (P , 0?0001) for RBC and r 5 0?305 (P , 0?0001) for hair. Conclusions: Estimated MeHg intake based on the FFQ was significantly associated with T-Hg concentrations in RBC and hair. Although the estimated value involves uncertainties, the FFQ appears to be a useful tool for assessment of exposure to MeHg.

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“…The hair samples were kept in a desiccator until mercury analysis. Since artificial hair-waving and hair-straightening may affect the total mercury (T-Hg) level in hair (Dakeishi et al, 2005;Ohba et al, 2008), they were banned during the whole period of this study.…”

Section: Study Protocolmentioning

confidence: 99%

Hair-to-blood ratio and biological half-life of mercury: experimental study of methylmercury exposure through fish consumption in humans

et al. 2012

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Effects of Hair Treatment on Hair Mercury—The Best Biomarker of Methylmercury Exposure?

Cited by 7 publications

References 16 publications

Assessment of Intrauterine Methylmercury Exposure Affecting Child Development: Messages from the Newborn

Assessment of Intrauterine Methylmercury Exposure Affecting Child Development: Messages from the Newborn

Assessment of exposure to methylmercury in pregnant Japanese women by FFQ

Hair-to-blood ratio and biological half-life of mercury: experimental study of methylmercury exposure through fish consumption in humans

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