title: [Genetic polymorphism and variability of steroid hormone metabolism: connection with risk of developing breast neoplasms].
abstract: Endogenous estradiol is synthesized in the ovarian theca cells of premenopausal women or in the stromal adipose cells of the breast of postmenopausal women and in minor quantities in peripheral tissue. These cells, as well as breast cancer tissue, express all the necessary enzymes for this synthesis: CYP17, CYP11a, CYP19, hydroxysteroid hydrogenase, steroid sulphatase as well as enzymes further hydroxylating estradiol such as CYP1A1, CYP3A4, CYP1B1. Polymorphisms in these enzymes may have a possible role in the link between environmental estrogens and hormone-like substances and the interindividual risk of breast cancer.
authors.forename: V N
authors.initials: VN
authors.lastname: Kristensen
authors.forename: N
authors.initials: N
authors.lastname: Harada
authors.forename: T
authors.initials: T
authors.lastname: Kristensen
authors.forename: A L
authors.initials: AL
authors.lastname: Borresen-Dale
mesh_terms: D001192:Arylsulfatases / Q000235:genetics / Q000378:metabolism; D001943:Breast Neoplasms / Q000235:genetics* / Q000378:metabolism; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics / Q000378:metabolism; D004958:Estradiol / Q000378:metabolism*; D005260:Female; D006801:Humans; D006913:Hydroxysteroid Dehydrogenases / Q000235:genetics / Q000378:metabolism; D011110:Polymorphism, Genetic; D017698:Postmenopause; D012307:Risk Factors; D043266:Steryl-Sulfatase
chemical_list: D004958:Estradiol; D003577:Cytochrome P-450 Enzyme System; D006913:Hydroxysteroid Dehydrogenases; D001192:Arylsulfatases; D043266:Steryl-Sulfatase