Effects of Anti-β2-Glycoprotein I Antibody on the Expression of Toll-like Receptors mRNA in Choriocarcinoma and Primary Trophoblast Cells

To investigate the effects of the anti- β2-glycoprotein I (anti-β2-GPI) antibody on the tro- phoblast by evaluating the effects of the anti-β2-GPI antibody on the expression of toll-like receptor (TLR) mRNA in choriocarcinoma cells and primary trophoblast cells.We cul- tured the choriocarcinoma cells (BeWo) and the pri- mary first trimester tropho- blast with the IgGs taken from anti-β2-GPI antibody-positive and -negative sera. Four hours later we purified the RNAs from those cells. We measured the expressions of TLR mRNA in cells using real-time. PCR.The expression of TLR mRNA increased in BeWo cells and primary trophoblast cells cultured with the IgGs taken from anti-β2-GPI antibody-positive women. Specifically, the expression of TLR1, 2, and 4 in BeWo cells -and TLRI, 3, 4, and 9 in first trimester trophoblast cells increased significantly.The anti-β2-GPI antibody-positive IgG increased the TElR mRNA expression in choriocarcino- ma cells and primary trophoblast cells. We suggest that anti-β2-GPI antibodies may bind to trophoblast and increase the expression of TLR mRNA.