Effect of preeclampsia on umbilical cord blood stem cells in relation to breast cancer susceptibility in the offspring
Qiu, Li ; Onoyama, Sagano ; Low, Hoi Pang ; Chang, Chien-I ; Strohsnitter, William C. ; Norwitz, Errol R. ; Lopresti, Mary ; Edmiston, Kathryn ; Lambe, Mats ; Trichopoulos, Dimitrios ... show 2 more
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Keywords
Adult
Breast Neoplasms
Cells, Cultured
Disease Susceptibility
Female
Fetal Blood
Fetal Stem Cells
Flow Cytometry
Humans
Infant, Newborn
Male
Pre-Eclampsia
Pregnancy
RNA, Messenger
Real-Time Polymerase Chain Reaction
Reverse Transcriptase Polymerase Chain Reaction
Young Adult
Cancer Biology
Cell Biology
Female Urogenital Diseases and Pregnancy Complications
Neoplasms
Women's Health
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Abstract
Women born from a preeclamptic (PE) pregnancy are associated with a lower risk of breast cancer. Prenatal and early-life exposures are hypothesized to influence breast cancer susceptibility through their effect on stem cells. We examined stem cell populations in umbilical cord blood from PE pregnancies and compared with those from pregnancies without this condition. We isolated mononuclear cells from 58 PE and 197 normotensive (non-PE) umbilical cord blood samples and examined the different stem cell populations. Hematopoietic (CD34(+) and CD34(+)CD38(-)), endothelial (CD34(+)CD133(+), CD34(+)VEGFR2(+), CD133(+)VEGFR2(+) and CD34(+)CD133(+)VEGFR2(+)), and putative breast (EpCAM(+), EpCAM(+)CD49f(+), EpCAM(+)CD49f(+)CD117(+), CD49f(+)CD24(+), CD24(+)CD29(+) and CD24(+)CD29(+)CD49f(+)) stem/progenitor cell subpopulations were quantified by flow cytometry and compared between PE and non-PE samples. Hematopoietic CD34(+) cell counts were significantly lowered in PE compared with non-PE samples (P = 0.039, Kruskal-Wallis test). Levels of CD34(+)CD133(+) endothelial progenitor cells were also lower in PE samples (P = 0.032, multiple regression analysis). EpCAM(+) and EpCAM(+)CD49f(+) putative breast stem cell levels were significantly lowered in PE subjects (multiple regression analysis: P = 0.038 and 0.007, respectively). Stratifying by newborn gender, EpCAM(+) and EpCAM(+)CD49f(+) stem cells were significantly lowered in PE samples of female, but not male, newborns. Umbilical cord blood samples from pregnancies complicated by preeclampsia thus had significantly lower levels of hematopoietic, endothelial, and putative breast stem cells than non-PE controls. With a lowered breast cancer risk for offspring of a PE pregnancy, our findings provide support to the hypothesis that susceptibility to breast oncogenesis may be affected by conditions and processes during the prenatal period. For Permissions, please email: journals.permissions@oup.com.
Source
Carcinogenesis. 2015 Jan;36(1):94-8. doi: 10.1093/carcin/bgu231. Epub 2014 Nov 14. Link to article on publisher's site