Adhesion of lymphocytic cells to human trophoblast cells in vitro

Gordon C Douglas, Carrie L. Sloan, Karine Hovanes, Twanda L. Thirkill, Grete N. Fry, Hendrik Hakim, Sonia Schmerl, Myra Jennings, Barry F. King

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The adherence of lymphocytic MOLT-4/clone 8 cells and normal human peripheral blood mononuclear cells (PBMCs) to primary cultures of term human syncytiotrophoblast has been characterized. Adherence was measured using a fluorescence-based assay in which leukocytic cells were labelled with calcein-AM. Adherence of MOLT cells to syncytiotrophoblast increased in a time-dependent fashion up to about 4 h after which adhesion decreased. Adhesion was detectable at 4°C but was greatly reduced compared to that seen at 37°C. Binding increased linearly as the ratio of MOLT cells to trophoblast was increased. Scanning and transmission electron microscopy of MOLT cell-trophoblast cocultures revealed lymphocytes adherent to the free microvillous surface of the syncytiotrophoblast masses. MOLT cells also adhered to cytotrophoblast but the extent of binding was lower that to syncytiotrophoblast. Normal human peripheral blood mononuclear cells adhered to syncytiotrophoblast. Preincubation of trophoblast cells with trypsin in the presence of calcium had no effect on subsequent adhesion of MOLT cells. However, preincubation of trophoblast cells with trypsin in the absence of divalent cations reduced subsequent adhesion. Adhesion of MOLT cells to syncytiotrophoblast was dependent on magnesium and calcium. These results show for the first time that lymphocytic cells adhere to isolated human syncytiotrophoblast and raise the possibility that this may be an important phenomenon in vivo.

Original languageEnglish (US)
Pages (from-to)65-80
Number of pages16
JournalJournal of Reproductive Immunology
Volume24
Issue number1
DOIs
StatePublished - 1993

Keywords

  • cell adhesion
  • lymphocytic cells
  • trophoblast

ASJC Scopus subject areas

  • Immunology
  • Reproductive Medicine

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    Douglas, G. C., Sloan, C. L., Hovanes, K., Thirkill, T. L., Fry, G. N., Hakim, H., Schmerl, S., Jennings, M., & King, B. F. (1993). Adhesion of lymphocytic cells to human trophoblast cells in vitro. Journal of Reproductive Immunology, 24(1), 65-80. https://doi.org/10.1016/0165-0378(93)90036-H