Expression and localization pattern of ABCA1 in diverse human placental primary cells and tissues

Nikitina, L; Wenger, F; Baumann, M; Surbek, D; Körner, M; Albrecht, C (2011). Expression and localization pattern of ABCA1 in diverse human placental primary cells and tissues. Placenta, 32(6), pp. 420-30. Amsterdam: Elsevier 10.1016/j.placenta.2011.03.003

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The ATP-binding cassette transporter A1 (ABCA1) mediates the transport of cholesterol, phospholipids, and other lipophilic molecules across cellular membranes. Recent data provide evidence that ABCA1 plays an important role in placental function but the exact cellular sites of ABCA1 action in the placenta remain controversial. To clarify this issue, we analyzed the cellular and subcellular localization of ABCA1 with immunocytochemistry, immunofluorescence and subsequent confocal or immunofluorescence microscopy in different types of isolated primary placenta cells: cytotrophoblast cells, amnion epithelial cells, villous macrophages (Hofbauer cells), and mesenchymal cells isolated from chorionic membrane and placental villi. After 12 h of cultivation, primary cytotrophoblast cells showed intensive membrane and cytoplasmic staining for ABCA1. After 24 h, with progressive syncytium formation, ABCA1 staining intensity was markedly reduced and ABCA1 was dispersed in the cytoplasm of the forming syncytial layer. In amnion epithelial cells, placental macrophages and mesenchymal cells, ABCA1 was predominantly localized at the cell membrane and cytoplasmic compartments partially corresponding to the endoplasmic reticulum. In these cell types, the ABCA1 staining intensity was not dependent on the cultivation time. In conclusion, ABCA1 shows marked expression levels in diverse placental cell types. The multitopic localization of ABCA1 in diverse human placental cells not all directly involved in materno-fetal exchange suggests that this protein may not only participate in transplacental lipid transport but could have additional regulatory functions.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Gynaecology 04 Faculty of Medicine > Service Sector > Institute of Pathology 04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Biochemistry and Molecular Medicine
UniBE Contributor:	Baumann, Marc, Surbek, Daniel, Körner Jachertz, Meike, Albrecht, Christiane
ISSN:	0143-4004
Publisher:	Elsevier
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:18
Last Modified:	05 Dec 2022 14:04
Publisher DOI:	10.1016/j.placenta.2011.03.003
PubMed ID:	21501868
Web of Science ID:	000291579100002
URI:	https://boris.unibe.ch/id/eprint/5519 (FactScience: 210272)