Dendritic polyglycerol nanoparticles show charge dependent bio-distribution in early human placental explants and reduce hCG secretion. Issue 2 (7th February 2018)

• Record Type: Journal Article
• Authors: Juch, Herbert; Nikitina, Liudmila; Reimann, Sabine; Gauster, Martin; Dohr, Gottfried; Obermayer-Pietsch, Barbara; Hoch, Denise; Kornmueller, Karin; Haag, Rainer
• Is Part Of: Nanotoxicology. Volume 12:Issue 2(2018)
• Page Start: 90
• Page End: 103
• Publication Date: 2018-02-07
• Subjects: Dendritic polyglycerol nanoparticles -- early human placenta -- hCG -- BeWo -- primary trophoblasts -- nanotoxicology; Toxicology -- Periodicals; 615.9
• DOI: 10.1080/17435390.2018.1425496
• Languages: English
• ISSNs: 1743-5390

Abstract

Abstract: A thorough understanding of nanoparticle bio-distribution at the feto-maternal interface will be a prerequisite for their diagnostic or therapeutic application in women of childbearing age and for teratologic risk assessment. Therefore, the tissue interaction of biocompatible dendritic polyglycerol nanoparticles (dPG-NPs) with first- trimester human placental explants were analyzed and compared to less sophisticated trophoblast-cell based models. First-trimester human placental explants, BeWo cells and primary trophoblast cells from human term placenta were exposed to fluorescence labeled, ∼5 nm dPG-NPs, with differently charged surfaces, at concentrations of 1 µM and 10 nM, for 6 and 24 h. Accumulation of dPGs was visualized by fluorescence microscopy. To assess the impact of dPG-NP on trophoblast integrity and endocrine function, LDH, and hCG releases were measured. A dose- and charge-dependent accumulation of dPG-NPs was observed at the early placental barrier and in cell lines, with positive dPG-NP-surface causing deposits even in the mesenchymal core of the placental villi. No signs of plasma membrane damage could be detected. After 24 h we observed a significant reduction of hCG secretion in placental explants, without significant changes in trophoblast apoptosis, at low concentrations of charged dPG-NPs. In conclusion, dPG-NP's surface charge substantially influences their bio-distribution at the feto-maternal interface, with positive charge facilitating trans-trophoblast passage, and in contrast to more artificial models, the first-trimester placental explant culture model reveals potentially hazardous influences of charged dPG-NPs on early placental physiology.