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Circulating Growth and Sex Hormone Levels and Breast Tissue Composition in Young Nulliparous Women.

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Date
2018-12
ICR Author
Folkerd, Elizabeth
Doran, Simon
Leach, Martin
Dowsett, Mitch
Author
Denholm, R
De Stavola, BL
Hipwell, JH
Doran, SJ
Holly, JMP
Folkerd, E
Dowsett, M
Leach, MO
Hawkes, DJ
Dos-Santos-Silva, I
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Type
Journal Article
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Abstract
Background Endogenous hormones are associated with breast cancer risk, but little is known about their role on breast tissue composition, a strong risk predictor. This study aims to investigate the relationship between growth and sex hormone levels and breast tissue composition in young nulliparous women.Methods A cross-sectional study of 415 young (age ∼21.5 years) nulliparous women from an English prebirth cohort underwent a MRI examination of their breasts to estimate percent-water (a proxy for mammographic percent density) and provided a blood sample to measure plasma levels of growth factors (insulin-like growth factor-I, insulin-like growth factor-II, insulin growth factor-binding protein-3, growth hormone) and, if not on hormonal contraception ( n = 117) sex hormones (dehydroepiandrosterone, androstenedione, testosterone, estrone, estadiol, sex hormone-binding globulin, prolactin). Testosterone ( n = 330) and sex hormone-binding globulin ( n = 318) were also measured at age 15.5 years. Regression models were used to estimate the relative difference (RD) in percent-water associated with one SD increment in hormone levels.Results Estradiol at age 21.5 and sex hormone-binding globulin at age 21.5 were positively associated with body mass index (BMI)-adjusted percent-water [RD (95% confidence interval (CI)): 3% (0%-7%) and 3% (1%-5%), respectively]. There was a positive nonlinear association between androstenedione at age 21.5 and percent-water. Insulin-like growth factor-I and growth hormone at age 21.5 were also positively associated with BMI-adjusted percent-water [RD (95% CI): 2% (0%-4%) and 4% (1%-7%), respectively].Conclusions The findings suggest that endogenous hormones affect breast tissue composition in young nulliparous women.Impact The well-established associations of childhood growth and development with breast cancer risk may be partly mediated by the role of endogenous hormones on breast tissue composition.
URI
https://repository.icr.ac.uk/handle/internal/2817
DOI
https://doi.org/10.1158/1055-9965.epi-18-0036
Collections
  • Breast Cancer Research
  • Molecular Pathology
  • Radiotherapy and Imaging
Subject
Breast
Humans
Growth Hormone
Sex Hormone-Binding Globulin
Cross-Sectional Studies
Parity
Adolescent
Adult
Female
Young Adult
Research team
Endocrinology
Magnetic Resonance
Language
eng
Date accepted
2018-09-07
License start date
2018-12
Citation
Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 2018, 27 (12), pp. 1500 - 1508

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