Purified IgG from patients with obstetric but not IgG from non-obstetric antiphospholipid syndrome inhibit trophoblast invasion

Katie Poulton, Vera M. Ripoll, Charis Pericleous, Pier Luigi Meroni, Maria Gerosa, Yiannis Ioannou, Anisur Rahman, Ian P. Giles

Research output: Contribution to journalArticle


Problem: Some patients with antiphospholipid syndrome (APS) suffer pregnancy morbidity (PM) but not vascular thrombosis (VT), whilst others suffer VT only. Therefore, we compared the effects of IgG from VT+/PM- and VT-/PM+ subjects on human first-trimester trophoblast (HTR8) cells. Method of study: HTR-8 cells were incubated with APS VT+/PM-, APS VT-/PM+ or healthy control (HC) IgG. We measured trophoblast invasion by cell invasion assay; mRNA expression of TLR4 and adaptor proteins; phosphorylation of p38 MAPK, NFκB and ERK; and expression of interleukin (IL)-8 and IL-6. Results: VT-/PM+ IgG, but not VT+/PM- IgG significantly reduced HTR-8 invasion. The effects on invasion were blocked by TLR-4 inhibition. Neither VT+/PM- nor VT-/PM+ IgG altered MyD88 mRNA expression, phosphorylation of signalling molecules or cytokine expression. Conclusions: VT-/PM+ IgG exert functionally relevant effects on human trophoblast cells but VT+/PM- IgG do not.

Original languageEnglish
Pages (from-to)390-401
Number of pages12
JournalAmerican Journal of Reproductive Immunology
Issue number5
Publication statusPublished - May 1 2015



  • Antiphospholipid
  • Obstetric
  • TLR4
  • Trophoblast

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy
  • Obstetrics and Gynaecology
  • Reproductive Medicine

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