Genetic control of fetal placental genomics contributes to development of health and disease

Author:

Bhattacharya ArjunORCID,Freedman Anastasia N.,Avula VennelaORCID,Harris RebecaORCID,Liu Weifang,Pan Calvin,Lusis Aldons J.ORCID,Joseph Robert M.ORCID,Smeester LisaORCID,Hartwell Hadley J.ORCID,Kuban Karl C.K.ORCID,Marsit Carmen J.ORCID,Li YunORCID,O’Shea T. MichaelORCID,Fry Rebecca C.ORCID,Santos Hudson P.ORCID

Abstract

ABSTRACTAs the master regulator in utero, the placenta is core to the Developmental Origins of Health and Disease (DOHaD) hypothesis but is historically understudied. To identify placental gene-trait associations (GTAs) across the life course, we performed distal mediator-enriched transcriptome-wide association studies (TWAS) for 40 traits, integrating placental multi-omics from the Extremely Low Gestational Age Newborn Study. At P < 2.5 × 10−6, we detected 248 GTAs, mostly for neonatal and metabolic traits, across 176 genes, enriched for cell growth and immunological pathways. In aggregate, genetic effects mediated by placental expression significantly explained 4 early-life traits but no later-in-life traits. 89 GTAs showed significant mediation through distal genetic variants, identifying hypotheses for distal regulation of GTAs. Investigation of one hypothesis in human placenta-derived choriocarcinoma cells showed that knockdown of mediator gene EPS15 upregulated predicted targets SPATA13 and FAM214A, both associated with waist-hip ratio in TWAS, and multiple genes involved in metabolic pathways. These results suggest profound health impacts of placental genomic regulation in developmental programming across the life course.

Publisher

Cold Spring Harbor Laboratory

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