GATA-2 restricts prolactin-like protein A expression to secondary trophoblast giant cells in the mouse

G. T. Ma, D. I.H. Linzer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


An analysis of the pattern of expression of the mouse placental hormone prolactin-like protein A (PLP-A) has revealed that this hormone is expressed exclusively in secondary trophoblast giant cells but not in primary giant cells. Thus, PLP-A serves as a marker for a subset of giant cells. Recent results have in- dicated that PLP-A binds to and inhibits the activity of natural killer cells, and thus, the localized expression of PLP-A may be important for regulating the activity of this class of T lymphocytes in a restricted region of the implantation site. Previous studies indicated that the transcription factor GATA-2 is required for the trophoblast giant cell-specific expression of two other hormones in the prolactin family, placental lactogen I and proliferin. In the absence of GATA-2, PLP-A continues to be expressed, but in this mutant background, PLP-A mRNA is detected in both primary and secondary giant cells. Thus, GATA-2 contributes both to positive and negative regulation of trophoblast giant cell-specific gene expression, and this factor apparently plays an important role in generating or maintaining the distinct functions of secondary, compared with primary, trophoblast giant cells.

Original languageEnglish (US)
Pages (from-to)570-574
Number of pages5
JournalBiology of reproduction
Issue number2
StatePublished - 2000


  • Development
  • Developmental biology
  • Gene regulation
  • Placenta
  • Pregnancy
  • Trophoblast

ASJC Scopus subject areas

  • Reproductive Medicine


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