Phyto- and xeno-estrogens: the contribution of diet and environment to endocrine disruption

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Phyto- and xeno-estrogens: the contribution of diet and environment to endocrine disruption. / Waring, Rosemary; Ayers, S; Gescher, AJ; Glatt, H-R; Meinl, W; Jarratt, P; Kirk, Christopher; Pettitt, Trevor; Rea, Daniel; Harris, Robert.

In: The Journal of Steroid Biochemistry and Molecular Biology, Vol. 108, No. 3, 01.02.2008, p. 213-230.

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@article{5037cb74c1b04b888d58adebd4f8bddc,
title = "Phyto- and xeno-estrogens: the contribution of diet and environment to endocrine disruption",
abstract = "Some endocrine disrupting compounds such as phthalates and phenols act non-genomically by inhibiting the sulfotransferase (SULT 1E1 and SULT 1A1) isoforms which inactivate estrogens by sulfonation. A range of environmental phenolic contaminants and dietary flavonoids was tested for inhibition of the human SULT 1A1, 1E1 and 2A1 isoforms. In particular, the plasticisers 4-n-octyl- and 4-n-nonyl-phenol inhibit SULT 1E1 with IC50 values of 0.16 mu M vs. 10 nM estradiol while the 2-substituted chlorophenols show similar values. Flavonoids are also SULT inhibitors; tricin is a competitive inhibitor of SULT 1E1 with a K-i of 1.5 +/- 0.8 nM. In a small pilot study to determine whether ingestion of soy flavonoids would affect SULT1A1 activity in vivo as well as in vitro, sulfonation of daidzein was reduced in a group of women 'at risk' of breast cancer, as compared with controls, although the SULT 1A1*1/SULT 1A1*2 allele ratio was not different. Endocrine disrupting effects in man may be multifactorial when components from both the diet and the environment act at the same point in steroid metabolism. (c) 2007 Elsevier Ltd. All rights reserved.",
keywords = "phytoestrogens, phenols, xenoestrogens, endocrine disruption, sulfotransferase, flavonoids",
author = "Rosemary Waring and S Ayers and AJ Gescher and H-R Glatt and W Meinl and P Jarratt and Christopher Kirk and Trevor Pettitt and Daniel Rea and Robert Harris",
year = "2008",
month = feb,
day = "1",
doi = "10.1016/j.jsbmb.2007.09.007",
language = "English",
volume = "108",
pages = "213--230",
journal = "The Journal of Steroid Biochemistry and Molecular Biology",
issn = "0960-0760",
publisher = "Elsevier",
number = "3",

}

RIS

TY - JOUR

T1 - Phyto- and xeno-estrogens: the contribution of diet and environment to endocrine disruption

AU - Waring, Rosemary

AU - Ayers, S

AU - Gescher, AJ

AU - Glatt, H-R

AU - Meinl, W

AU - Jarratt, P

AU - Kirk, Christopher

AU - Pettitt, Trevor

AU - Rea, Daniel

AU - Harris, Robert

PY - 2008/2/1

Y1 - 2008/2/1

N2 - Some endocrine disrupting compounds such as phthalates and phenols act non-genomically by inhibiting the sulfotransferase (SULT 1E1 and SULT 1A1) isoforms which inactivate estrogens by sulfonation. A range of environmental phenolic contaminants and dietary flavonoids was tested for inhibition of the human SULT 1A1, 1E1 and 2A1 isoforms. In particular, the plasticisers 4-n-octyl- and 4-n-nonyl-phenol inhibit SULT 1E1 with IC50 values of 0.16 mu M vs. 10 nM estradiol while the 2-substituted chlorophenols show similar values. Flavonoids are also SULT inhibitors; tricin is a competitive inhibitor of SULT 1E1 with a K-i of 1.5 +/- 0.8 nM. In a small pilot study to determine whether ingestion of soy flavonoids would affect SULT1A1 activity in vivo as well as in vitro, sulfonation of daidzein was reduced in a group of women 'at risk' of breast cancer, as compared with controls, although the SULT 1A1*1/SULT 1A1*2 allele ratio was not different. Endocrine disrupting effects in man may be multifactorial when components from both the diet and the environment act at the same point in steroid metabolism. (c) 2007 Elsevier Ltd. All rights reserved.

AB - Some endocrine disrupting compounds such as phthalates and phenols act non-genomically by inhibiting the sulfotransferase (SULT 1E1 and SULT 1A1) isoforms which inactivate estrogens by sulfonation. A range of environmental phenolic contaminants and dietary flavonoids was tested for inhibition of the human SULT 1A1, 1E1 and 2A1 isoforms. In particular, the plasticisers 4-n-octyl- and 4-n-nonyl-phenol inhibit SULT 1E1 with IC50 values of 0.16 mu M vs. 10 nM estradiol while the 2-substituted chlorophenols show similar values. Flavonoids are also SULT inhibitors; tricin is a competitive inhibitor of SULT 1E1 with a K-i of 1.5 +/- 0.8 nM. In a small pilot study to determine whether ingestion of soy flavonoids would affect SULT1A1 activity in vivo as well as in vitro, sulfonation of daidzein was reduced in a group of women 'at risk' of breast cancer, as compared with controls, although the SULT 1A1*1/SULT 1A1*2 allele ratio was not different. Endocrine disrupting effects in man may be multifactorial when components from both the diet and the environment act at the same point in steroid metabolism. (c) 2007 Elsevier Ltd. All rights reserved.

KW - phytoestrogens

KW - phenols

KW - xenoestrogens

KW - endocrine disruption

KW - sulfotransferase

KW - flavonoids

UR - http://www.scopus.com/inward/record.url?scp=38749138087&partnerID=8YFLogxK

U2 - 10.1016/j.jsbmb.2007.09.007

DO - 10.1016/j.jsbmb.2007.09.007

M3 - Article

C2 - 17933522

VL - 108

SP - 213

EP - 230

JO - The Journal of Steroid Biochemistry and Molecular Biology

JF - The Journal of Steroid Biochemistry and Molecular Biology

SN - 0960-0760

IS - 3

ER -