1. Maternal reproductive hormones and angiogenic factors in pregnancy and subsequent breast cancer risk.
- Author
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Cornish R, Staff AC, Boyd A, Lawlor DA, Tretli S, Bradwin G, McElrath TF, Hyer M, Hoover RN, and Troisi R
- Subjects
- Adult, Case-Control Studies, Cohort Studies, Female, Humans, Logistic Models, Longitudinal Studies, Middle Aged, Norway, Odds Ratio, Pregnancy, Prospective Studies, Angiogenic Proteins metabolism, Breast Neoplasms pathology, Placenta Growth Factor metabolism
- Abstract
Purpose: Breast cancer risk associated with pregnancy characteristics may be mediated by maternal hormones or angiogenic factors., Methods: We conducted a prospective breast cancer case-control study among women in the Avon Longitudinal Study of Parents and Children (ALSPAC) and Norwegian Mother and Child Cohort Study (MoBa) related to maternal pregnancy prolactin (n = 254 cases and 374 controls), placental growth factor (PlGF, n = 252 and 371), soluble fms-like tyrosine kinase-1 (sFlt-1, n = 118 and 240) and steroid hormone concentrations (ALSPAC only, n = 173 and 171). Odds ratios (OR) and 95% confidence intervals (CI) for a 1 SD change in analytes were estimated using unconditional logistic regression with matching factors (cohort, mother's birth year, serum/plasma, blood collection timing) and gestational age., Results: Breast cancer ORs (95% CI) were 0.85 (0.51-1.43) for estradiol, 0.86 (0.67-1.09) for testosterone, 0.89 (0.71-1.13) for androstenedione, 0.97 (0.71-1.34) for hCG, 0.93 (0.75, 1.15) for prolactin, 1.00 (0.78-1.27) for PlGF and 1.91 (1.00-3.65 ALSPAC) and 0.94 (0.73-1.21 MoBa) for sFlt-1, and were similar adjusting for potential confounders. Results were similar by blood collection timing, parity, age at first birth or diagnosis, and time between pregnancy and diagnosis., Conclusion: These data do not provide strong evidence of associations between maternal hormones or angiogenic factors with subsequent maternal breast cancer risk.
- Published
- 2019
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