AUTHOR=Perez-Sepulveda Alejandra , Torres Maria Jose , Khoury Maroun , Illanes Sebastian E. 

TITLE=Innate Immune System and Preeclampsia

JOURNAL=Frontiers in Immunology

VOLUME=5

YEAR=2014

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2014.00244

DOI=10.3389/fimmu.2014.00244

ISSN=1664-3224

ABSTRACT=<p>Normal pregnancy is considered as a Th2 type immunological state that favors an immune-tolerance environment in order to prevent fetal rejection. Preeclampsia (PE) has been classically described as a Th1/Th2 imbalance; however, the Th1/Th2 paradigm has proven insufficient to fully explain the functional and molecular changes observed during normal/pathological pregnancies. Recent studies have expanded the Th1/Th2 into a Th1/Th2/Th17 and regulatory T-cells paradigm and where dendritic cells could have a crucial role. Recently, some evidence has emerged supporting the idea that mesenchymal stem cells might be part of the feto-maternal tolerance environment. This review will discuss the involvement of the innate immune system in the establishment of a physiological environment that favors pregnancy and possible alterations related to the development of PE.</p>