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Effects of anti-phospholipid antibodies on a human trophoblast cell line (HTR-8/SVneo)

Milica Jovanović, Milica Bozić, Tamara Kovacević, Ljiljana Radojcić, Milos Petronijević, Ljiljana Vićovac
Acta Histochemica 2010, 112 (1): 34-41
18835012
Antibodies to phospholipids (aPL) have been shown to adversely affect trophoblast invasion in vivo and in vitro. HTR-8/SVneo cells derived from first trimester of pregnancy extravillous trophoblast were studied. Matrigel invasion assay, cytochemistry and cell-based enzyme-linked immunosorbant assay (ELISA) with aPL or normal IgG was used. Our data show that aPL at 100 microg/ml decrease invasiveness of HTR-8/SVneo cells to 60% of control (p<0.01), and this was also shown for primary cytotrophoblast (to 15.5% of control, p<0.001). aPL treatment caused a significant decrease in integrin alpha(1), alpha(5), and beta(1) proteins (86%, 84%, and 87%, respectively). We conclude that HTR-8/SVneo cell culture is a suitable model to study mechanisms of action of aPL on trophoblast, which in HTR-8/SVneo cells inhibit invasion by decreasing integrins alpha(5), alpha(1), and beta(1).

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