Differential Gene Expression at the Maternal-Fetal Interface in Preeclampsia Is Influenced by Gestational Age
2013 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 8, no 7, e69848- p.Article in journal (Refereed) Published
Genome-wide transcription data of utero-placental tissue has been used to identify altered gene expression associated with preeclampsia (PE). As many women with PE deliver preterm, there is often a difference in gestational age between PE women and healthy pregnant controls. This may pose a potential bias since gestational age has been shown to dramatically influence gene expression in utero-placental tissue. By pooling data from three genome-wide transcription studies of the maternal-fetal interface, we have evaluated the relative effect of gestational age and PE on gene expression. A total of 18,180 transcripts were evaluated in 49 PE cases and 105 controls, with gestational age ranging from week 14 to 42. A total of 22 transcripts were associated with PE, whereas 92 transcripts with gestational age (nominal P value <1.51*10(-6), Bonferroni adjusted P value <0.05). Our results indicate that gestational age has a great influence on gene expression both in normal and PE-complicated pregnancies. This effect might introduce serious bias in data analyses and needs to be carefully assessed in future genome-wide transcription studies.
Place, publisher, year, edition, pages
2013. Vol. 8, no 7, e69848- p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-206999DOI: 10.1371/journal.pone.0069848ISI: 000322633700047OAI: oai:DiVA.org:uu-206999DiVA: diva2:646395