title: Maternal high-fat diet alters expression of pathways of growth, blood supply and arachidonic acid in rat placenta.
abstract: The high fat content in Western diets probably affects placental function during pregnancy with potential consequences for the offspring in the short and long term. The aim of the present study was to compare genome-wide placental gene expression between rat dams fed a high-fat diet (HFD) and those fed a control diet for 3 weeks before conception and during gestation. Gene expression was measured by microarray and pathway analysis was performed. Gene expression differences were replicated by real-time PCR and protein expression was assessed by Western blot analysis. Placental and fetal weights at E17.25 were not altered by exposure to the maternal HFD. Gene pathways targeting placental growth, blood supply and chemokine signalling were up-regulated in the placentae of dams fed the HFD. The up-regulation in messenger RNA expression for five genes Ptgs2 (fatty acid cyclo-oxidase 2; COX2), Limk1 (LIM domain kinase 1), Pla2g2a (phospholipase A2), Itga1 (integrin α-1) and Serpine1 was confirmed by real-time PCR. Placental protein expression for COX2 and LIMK was also increased in HFD-fed dams. In conclusion, maternal HFD feeding alters placental gene expression patterns of placental growth and blood supply and specifically increases the expression of genes involved in arachidonic acid and PG metabolism. These changes indicate a placental response to the altered maternal metabolic environment.
authors.affiliation: University of Queensland Centre for Clinical Research , Royal Brisbane and Women's Hospital Campus, Herston, QLD , Australia 4029.
authors.forename: Marloes
authors.initials: M
authors.lastname: Dekker Nitert
authors.affiliation: University of Queensland Centre for Clinical Research , Royal Brisbane and Women's Hospital Campus, Herston, QLD , Australia 4029.
authors.forename: Kanchan
authors.initials: K
authors.lastname: Vaswani
authors.affiliation: University of Queensland Centre for Clinical Research , Royal Brisbane and Women's Hospital Campus, Herston, QLD , Australia 4029.
authors.forename: Melissa
authors.initials: M
authors.lastname: Hum
authors.affiliation: University of Queensland Centre for Clinical Research , Royal Brisbane and Women's Hospital Campus, Herston, QLD , Australia 4029.
authors.forename: Hsiu-Wen
authors.initials: HW
authors.lastname: Chan
authors.affiliation: Department of Anatomy and Developmental Biology , Monash University , Clayton, VIC , Australia 3800.
authors.forename: Ryan
authors.initials: R
authors.lastname: Wood-Bradley
authors.affiliation: Department of Anatomy and Developmental Biology , Monash University , Clayton, VIC , Australia 3800.
authors.forename: Sarah
authors.initials: S
authors.lastname: Henry
authors.affiliation: Department of Anatomy and Developmental Biology , Monash University , Clayton, VIC , Australia 3800 ; School of Medicine (Optometry), Faculty of Health , Deakin University , Waurn Ponds, VIC , Australia.
authors.forename: James A
authors.initials: JA
authors.lastname: Armitage
authors.affiliation: University of Queensland Centre for Clinical Research , Royal Brisbane and Women's Hospital Campus, Herston, QLD , Australia 4029.
authors.forename: Murray D
authors.initials: MD
authors.lastname: Mitchell
authors.affiliation: University of Queensland Centre for Clinical Research , Royal Brisbane and Women's Hospital Campus, Herston, QLD , Australia 4029.
authors.forename: Gregory E
authors.initials: GE
authors.lastname: Rice
keywords: Arachidonic acid; COX2, cyclo-oxidase 2; HFD, high-fat diet; High-fat diet; LIM domain kinase 1; LIMK1, LIM domain kinase 1; Placenta; mRNA, messenger RNA