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Erschienen in: European Journal of Nutrition 5/2017

02.06.2016 | Original Contribution

Relationship of equol production between children aged 5–7 years and their mothers

verfasst von: Keiko Wada, Tomomi Ueno, Shigeto Uchiyama, Yasuhiro Abiru, Michiko Tsuji, Kie Konishi, Fumi Mizuta, Yuko Goto, Takashi Tamura, Makoto Shiraki, Shinichi Iwasa, Chisato Nagata

Erschienen in: European Journal of Nutrition | Ausgabe 5/2017

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Abstract

Purpose

The factors responsible for the production of isoflavone metabolites have not yet been identified. We aimed to examine the relationships of equol production between mother and child in a birth cohort in Japan.

Methods

Subjects were a part of the participants in a longitudinal study on pregnant women and their offspring. When children were 5–7 years old, mothers and children were asked to reply to a questionnaire on lifestyles and a 3-day child’s dietary record. Mothers and children were given a bar-shaped soy snack (Soyjoy®) daily on two consecutive days (soy challenge). The snack contained 14 mg of overall soy isoflavones as the sum of aglycones and the glucosides for mothers and 7.5 mg for children. On the morning of day 0 and 3, they were asked to mail their first-void urines. Urinary isoflavone metabolites of 159 mother–child pairs were measured by a high-performance liquid chromatography method.

Results

Equol producers were 35.5 % among mothers and 13.8 % among children. Equol producer status of a child was neither associated with dietary intake nor with urinary levels of daidzein and genistein. After multiple adjustments for potential confounders, the estimated relative risk of equol producer was 2.75 (95 % confidence interval 1.00, 7.52) among children whose mother was an equol producer, compared with children whose mother was a non-producer.

Conclusion

Child’s equol production was associated with the mother’s equol producer status. The effects of maternal factors on child’s equol production should be studied further.
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Metadaten
Titel
Relationship of equol production between children aged 5–7 years and their mothers
verfasst von
Keiko Wada
Tomomi Ueno
Shigeto Uchiyama
Yasuhiro Abiru
Michiko Tsuji
Kie Konishi
Fumi Mizuta
Yuko Goto
Takashi Tamura
Makoto Shiraki
Shinichi Iwasa
Chisato Nagata
Publikationsdatum
02.06.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nutrition / Ausgabe 5/2017
Print ISSN: 1436-6207
Elektronische ISSN: 1436-6215
DOI
https://doi.org/10.1007/s00394-016-1233-x

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