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Reproductive Sciences
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Programming of Human Monocytes by the Uteroplacental Environment

Ramsey H. McIntire, PhD

Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Kansas, mcintirer{at}obgyn.ucsf.edu

Karen G. Ganacias, BS

Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Kansas

Joan S. Hunt, PhD, DSc

Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, Kansas

During human pregnancy, monocytes recruited to the uterus (decidua) are modified to promote immune defense and semiallogeneic pregnancy. The purpose of this study was to identify decidual factors involved in programming of monocytes into decidual macrophages by comparing the surface and secretory phenotypes of resting and interferon- {gamma} (IFN-{gamma})—activated monocytes, unfractionated decidual cells, purified term decidual macrophages, and monocyte-derived macrophages. Surface markers for antigen presentation (HLA-DR, CD86), a membrane-bound cytokine interleukin (IL)—15, leukocyte immunoglobulin-like receptors (LILRB1, LILRB2), and secreted anti-inflammatory cytokines (transforming growth factor [TGF]—β1 and IL-10) were assessed. The results demonstrate that differentiated, activated monocytes closely resemble but are not identical to decidual macrophages. In addition to differential IFN-{gamma} responsiveness, decidual macrophages were smaller than monocyte-derived macrophages and produced IL-10, which monocyte-derived macrophages did not. Only the unfractionated decidual cells secreted TGF-β1. These results suggest that activation, differentiation, and decidual signals cooperate to program monocytes into the decidual macrophage phenotype.

Key Words: Activation • cell surface markers • cytokines • differentiation • leukocyte immunoglobulin-like receptors (LILR).

Reproductive Sciences, Vol. 15, No. 5, 437-447 (2008)
DOI: 10.1177/1933719107314065
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 Reproductive SciencesHome page
G. Weiss, L. T. Goldsmith, R. N. Taylor, D. Bellet, and H. S. Taylor
Inflammation in Reproductive Disorders
Reproductive Sciences, February 1, 2009; 16(2): 216 - 229.
[Abstract] [PDF]