title: Perfusion of human term placentas with lipopolysaccharide did not affect the capacity of the fetal and maternal tissues to produce interleukin-10.
abstract: IL-10 is anti-inflammatory cytokine that is involved in the regulation of the pregnancy process. We examined the capacity of fetal and maternal placental tissues from human term placentas, to produce IL-10, in the presence and absence of LPS. The levels of IL-10 were examined (by ELISA and immunohistochemical staining) in the fetal and maternal tissues of human placentas after 10 hours of perfusion, in the presence or absence of lipopolysaccharide (LPS; 1 microg/k"g perfused tissue). We could detect IL-10 in amnion (A; 13.91+/-11.35 pg/ml) and chorion (CH; 7.85 +/- 6.38 pg/ml) tissue homogenates, and in the homogenates of three different sites of the placental tissue compartment (subchorionic placenta (SubCH); 7.39 +/- 4.39 pg/ml, mid-placenta (MidPL); 8.9 +/- 4.73 pg/ml and decidua (Decid); 16.48 + 11.86 pg/ml). Immunohistochemical studies showed that IL-10 was localized in the epithelial cells of the amnion, and in the fibroblasts and macrophages of the chorion. In the placenta and mid-placental sites, IL-10 is localized mainly in cytotrophoblasts and syncytotrophoblasts. The presence of LPS in the perfusion media of the placentas for 10 hours, did not significantly affect the capacity of the fetal and maternal tissues to produce IL-10. Thus, our results may indicate the involvement of the fetal compartment in the down-regulation of the cell-mediated response of the maternal compartment against the fetus, by producing IL-10 under physiological conditions. Infection/inflammation agents such as LPS did not affect the expression levels of IL-10 in the placenta.
authors.affiliation: Department of Microbiology and Immunology, Soroka University Medical Center, Beer-Sheva, Israel. huleihel@bgumail.bgu.ac.il
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Huleihel
authors.forename: Amash
authors.initials: A
authors.lastname: Alaa
authors.forename: Sapir
authors.initials: S
authors.lastname: Olga
authors.forename: Maor
authors.initials: M
authors.lastname: E
authors.forename: Sharon
authors.initials: S
authors.lastname: Levy
authors.forename: Miriam
authors.initials: M
authors.lastname: Katz
authors.forename: Lesly
authors.initials: L
authors.lastname: Myatt
authors.forename: Holcberg
authors.initials: H
authors.lastname: Gershon
mesh_terms: D005260:Female; D005333:Fetus / Q000187:drug effects; D006801:Humans; D016753:Interleukin-10 / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology*; D010920:Placenta / Q000187:drug effects*; D011247:Pregnancy
chemical_list: D008070:Lipopolysaccharides; D016753:Interleukin-10