Differentiation-dependent expression of gelatinase B/matrix metalloproteinase-9 in trophoblast cells

Thomas J. Peters, Andrea Albieri, Estela Bevilacqua, Belinda M. Chapman, Linda H. Crane, Gary P. Hamlin, Motoharu Seiki, Michael J. Soares*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

35 Citations (Scopus)


The purpose of this study was to evaluate the Rcho-1 trophoblast culture system as a model for studying trophoblast invasion and to examine stage-specific expression of enzyme(s) potentially participating in rat trophoblast giant cell invasive behavior. The invasive behavior of the differentiating Rcho-1 trophoblast cells was demonstrated using Matrigel invasion chambers. Gelatin zymography and Western blot analysis of conditioned medium from differentiating Rcho-1 trophoblast cell cultures and rat ectoplacental cone outgrowths revealed a differentiation-dependent increase in gelatinase B/matrix metalloproteinase (MMP-9). Nothern blot and reverse transcriptase polymerase chain reaction (RT-PCR) analyses of Rcho-1 trophoblast or ectoplacental cone cells also showed increasing expression of MMP-9 accompanying cell differentiation. Rcho-1 trophoblast cells stably transfected with MMP-9 promoter/luciferase reporter constructs exhibited a differentiation-dependent increase in MMP-9 promoter activation. In conclusion, trophoblast giant cell differentiation is characterized by transcriptional activation of the MMP-9 gene and appearance of the invasive phenotype.

Original languageEnglish
Pages (from-to)287-296
Number of pages10
JournalCell and Tissue Research
Issue number2
Publication statusPublished - 2 Feb 1999
Externally publishedYes


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