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Document Version Version Comment Date Status
717948.0 Automatic journal name synchronization 16.04.2016 20:15 Released

ID: 717948.0, MPI für molekulare Zellbiologie und Genetik / MPI-CBG Publications 2015 (arch)
Lipidome of midbody released from neural stem and progenitor cells during mammalian cortical neurogenesis.
Authors:Arai, Yoko; Sampaio, Julio; Wilsch-Bräuninger, Michaela; Ettinger, Andreas; Haffner, Christiane; Huttner, Wieland B.
Date of Publication (YYYY-MM-DD):2015
Title of Journal:Frontiers in Cellular Neuroscience
Sequence Number of Article:325
Copyright:not available
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Midbody release from proliferative neural progenitor cells is tightly associated with the neuronal commitment of neural progenitor cells during the progression of neurogenesis in the mammalian cerebral cortex. While the central portion of the midbody, a cytoplasmic bridge between nascent daughter cells, is engulfed by one of the daughter cell by most cells in vitro, it is shown to be released into the extracellular cerebrospinal fluid (CF) in vivo in mouse embryos. Several proteins have been involved in midbody release; however, few studies have addressed the participation of the plasma membrane's lipids in this process. Here, we show by Shotgun Lipidomic analysis that phosphatydylserine (PS), among other lipids, is enriched in the released midbodies compared to lipoparticles and cellular membranes, both collected from the CF of the developing mouse embryos. Moreover, the developing mouse embryo neural progenitor cells released two distinct types of midbodies carrying either internalized PS or externalized PS on their membrane. This strongly suggests that phagocytosis and an alternative fate of released midbodies exists. HeLa cells, which are known to mainly engulf the midbody show almost no PS exposure, if any, on the outer leaflet of the midbody membrane. These results point toward that PS exposure might be involved in the selection of recipients of released midbodies, either to be engulfed by daughter cells or phagocytosed by non-daughter cells or another cell type in the developing cerebral cortex.
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Communicated by:Thüm
Affiliations:MPI für molekulare Zellbiologie und Genetik