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The Immunomodulatory Roles of Macrophages at the Maternal—Fetal Interface

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Abstract

Macrophages are versatile cells that play a central role in innate and adaptive immunity and participate in a wide variety of biological processes. In the uterine decidua, macrophages represent a major leukocyte subset throughout pregnancy. Here, decidual macrophages exert an immunosuppressive phenotype characterized by abundant production of interleukin (IL)-10 and indoleamine 2,3-dioxygenase activity. Their polarized cytokine secretion pattern has recently been classified as an M2 phenotype. These features of decidual macrophages favor maternal immune tolerance to semiallogenic fetus. In addition, macrophages cooperate with trophoblast cells during the early stages of human pregnancy to support uterine vasculature remodeling by removing apoptotic cells and through the production of proteases that degrade the extracellular matrix. In the peripartum period, macrophages also participate in the regulation of cervical ripening and the initiation of parturition through the production of proinflammatory cytokines and prostaglandin E2 (PGE2). Aberrant activity of uterine macrophages is linked to the pathogenesis of preeclampsia and preterm delivery. Here, we review the immunomodulatory roles of decidual macrophages during pregnancy.

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  1. Division of Perinatal Research, Department of Obstetrics, Gynecology and Women’s Health, University of Missouri-Columbia, 500 N. Keene St., Suite 203, Columbia, Missouri, 65201, USA

    Takeshi Nagamatsu MD, PhD & Danny J. Schust MD

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Nagamatsu, T., Schust, D.J. The Immunomodulatory Roles of Macrophages at the Maternal—Fetal Interface. Reprod. Sci. 17, 209–218 (2010). https://doi.org/10.1177/1933719109349962

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