TY - JOUR

T1 - Impact of Male Origin Microchimerism on Cardiovascular Disease in Women

T2 - A Prospective Cohort Study

AU - Hallum, Sara

AU - Gerds, Thomas Alexander

AU - Sehested, Thomas Steen Gyldenstierne

AU - Jakobsen, Marianne Antonius

AU - Tjønneland, Anne

AU - Kamper-Jørgensen, Mads

N1 - © The Author(s) 2020. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

PY - 2021

Y1 - 2021

N2 - Increasing parity is associated with an increased risk of ischemic heart disease (IHD) and stroke in women. This is likely attributed to biological responses of pregnancy. Male cells of presumed fetal origin are commonly present in women years after pregnancy-a phenomenon termed male origin microchimerism. Here, we investigated whether male origin microchimerism was associated with risk of IHD and ischemic stroke in women. We evaluated the association between male origin microchimerism and ischemic events in a cohort of 766 Danish women enrolled in the Diet, Cancer and Health cohort during 1993-1997 when aged 50-64 years. Of these, 545 (71.2%) tested positive for male origin microchimerism by targeting the Y-chromosome (DYS14) in women's blood. Multiple Cox regression models were used to report hazard ratios with 95% confidence intervals. We found male origin microchimerism was associated with a significantly reduced rate of IHD (HR=0.44, 95% CI: 0.23, 0.83), but not ischemic stroke (HR=0.80, 95% CI: 0.46, 1.41). Our findings show that microchimerism-positivity is associated with a lower rate of later IHD development in women. Although the underlying mechanisms are presently unknown, male origin microchimerism may be relevant in women's cardiovascular health. More studies are needed to confirm these findings.

AB - Increasing parity is associated with an increased risk of ischemic heart disease (IHD) and stroke in women. This is likely attributed to biological responses of pregnancy. Male cells of presumed fetal origin are commonly present in women years after pregnancy-a phenomenon termed male origin microchimerism. Here, we investigated whether male origin microchimerism was associated with risk of IHD and ischemic stroke in women. We evaluated the association between male origin microchimerism and ischemic events in a cohort of 766 Danish women enrolled in the Diet, Cancer and Health cohort during 1993-1997 when aged 50-64 years. Of these, 545 (71.2%) tested positive for male origin microchimerism by targeting the Y-chromosome (DYS14) in women's blood. Multiple Cox regression models were used to report hazard ratios with 95% confidence intervals. We found male origin microchimerism was associated with a significantly reduced rate of IHD (HR=0.44, 95% CI: 0.23, 0.83), but not ischemic stroke (HR=0.80, 95% CI: 0.46, 1.41). Our findings show that microchimerism-positivity is associated with a lower rate of later IHD development in women. Although the underlying mechanisms are presently unknown, male origin microchimerism may be relevant in women's cardiovascular health. More studies are needed to confirm these findings.

U2 - 10.1093/aje/kwaa250

DO - 10.1093/aje/kwaa250

M3 - Journal article

C2 - 33184639

VL - 190

SP - 853

EP - 863

JO - American Journal of Epidemiology

JF - American Journal of Epidemiology

SN - 0002-9262

IS - 5

ER -