Source:http://linkedlifedata.com/resource/pubmed/id/15035688
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
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pubmed:dateCreated |
2004-3-23
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pubmed:abstractText |
The urinary excretion of soya isoflavones and gut microflora metabolites was investigated in infants and children who had been fed soya-based infant formulas in early infancy. These infants and children were compared with cows'-milk formula-fed controls, to determine at what age gut microflora metabolism of daidzein to equol and/or O-desmethylangolensin (O-DMA) was established, and whether exposure to isoflavones in early infancy influences their metabolism at a later stage of development. Sixty infants and children (aged 4 months-7 years) participated in the study; thirty in each of the soya and control groups. There were four age groups. These were: 4-6 months (seven in the soya group and seven in the control group); 7-12 months (seven in the soya group and nine in the control group); 1-3 years (six in the soya group and eight in the control group); 3-7 years (ten in the soya group and six in the control group). Urine samples were collected to measure isoflavonoids by MS, and faecal samples were collected to measure gut-health-related bacterial composition, by fluorescent in situ hybridisation with oligonucleotide probes, and metabolic activity. A soya challenge (typically a soya yoghurt alternative product containing 4.8 g soya protein and on average 22 mg total isoflavones) was given to control-group infants (>6 months) and children, and also to soya-group children that were no longer consuming soya, to determine their ability to produce equol and/or O-DMA. Urinary genistein, daidzein and glycitein were detected in all infants (4-6 months) fed soya-based infant formula; O-DMA was detected in 75 % of infants but equol was detected in only 25 %. In the controls (4-6 months), urinary isoflavonoids were very low or not detected. In the older age groups (7 months-7 years), O-DMA was found in the urine samples of 75 % of the soya group and 50 % of the controls, after the soya challenge. Equol excretion was detected in 19 % of the soya-group infants and children, and in only 5 % of the controls. However, in the oldest (3-7 years) children, the proportion excreting O-DMA and equol was similar in both groups. Faecal bacterial numbers for bifidobacteria (P<0.001), bacteroides and clostridia (P<0.05) were significantly lower for the soya group compared with the control group. There appears to be no lasting effect of early-life isoflavone exposure on isoflavone metabolism.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/4',7-dihydroxy-3,4-dihydroisoflavone,
http://linkedlifedata.com/resource/pubmed/chemical/Equol,
http://linkedlifedata.com/resource/pubmed/chemical/Genistein,
http://linkedlifedata.com/resource/pubmed/chemical/Isoflavones,
http://linkedlifedata.com/resource/pubmed/chemical/O-desmethylangolensin,
http://linkedlifedata.com/resource/pubmed/chemical/daidzein,
http://linkedlifedata.com/resource/pubmed/chemical/glycitein
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pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
0007-1145
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
91
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
607-16
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pubmed:dateRevised |
2011-11-17
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pubmed:meshHeading |
pubmed-meshheading:15035688-Aging,
pubmed-meshheading:15035688-Animals,
pubmed-meshheading:15035688-Bacteria,
pubmed-meshheading:15035688-Child,
pubmed-meshheading:15035688-Child, Preschool,
pubmed-meshheading:15035688-Child Nutritional Physiological Phenomena,
pubmed-meshheading:15035688-Equol,
pubmed-meshheading:15035688-Feces,
pubmed-meshheading:15035688-Genistein,
pubmed-meshheading:15035688-Humans,
pubmed-meshheading:15035688-Infant,
pubmed-meshheading:15035688-Infant Formula,
pubmed-meshheading:15035688-Infant Nutritional Physiological Phenomena,
pubmed-meshheading:15035688-Isoflavones,
pubmed-meshheading:15035688-Milk,
pubmed-meshheading:15035688-Soy Milk
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pubmed:year |
2004
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pubmed:articleTitle |
Influence of soya-based infant formula consumption on isoflavone and gut microflora metabolite concentrations in urine and on faecal microflora composition and metabolic activity in infants and children.
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pubmed:affiliation |
Northern Ireland Centre for Food and Health, University of Ulster, Coleraine BT52 1SA, UK.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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