Homeobox gene distal-less 3 is a regulator of villous cytotrophoblast differentiation and its expression is increased in human idiopathic foetal growth restriction

Amy Chui, Charmaine Tay, Melanie Cocquebert, Penelope Sheehan, Niroshani A. Pathirage, Susan Donath, Thierry Fournier, Josette Badet, Evain Brion Daniele, Shaun P. Brennecke, Bill Kalionis, Padma Murthi

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14 Citations (Scopus)

Abstract

Human idiopathic foetal growth restriction (FGR) is frequently associated with placental insufficiency. In our previous studies, we have reported the isolation and characterisation of the homeobox gene Distal-less 3 (DLX3) in the human placenta. In this study, we have investigated the level of DLX3 expression in idiopathic FGR-affected placentae and determined its functional role in villous trophoblast differentiation. FGR-affected placentae (n=25) were collected based on well-defined clinical criteria and matched for gestation with control uncomplicated pregnancies (n=25). Real-time polymerase chain reaction and immunoblotting showed increased DLX3 mRNA and protein expression in FGR-affected placentae compared with gestation-matched controls. Qualitative immunohistochemistry revealed DLX3 localisation in the syncytiotrophoblast, cytotrophoblasts and endothelial cells surrounding the foetal capillaries in both FGR-affected and control placentae. Down-regulation of DLX3 in primary villous trophoblast cells and a trophoblastderived cell line showed decreased expression of differentiation markers, 3βHSD, βhCG and syncytin. Therefore, we conclude that increased DLX3 expression in FGR may contribute to trophoblast dysfunction observed in FGR. 

Original languageEnglish
Pages (from-to)273-284
Number of pages12
JournalJournal of Molecular Medicine
Volume90
Issue number3
DOIs
Publication statusPublished - Mar 2012
Externally publishedYes

Keywords

  • DLX3
  • FGR
  • Function
  • Placenta
  • Trophoblast

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