부산대학교 도서관

Neural stem cells (NSCs) have the ability to self-renew and to differentiate into various cell types of the central nervous system. This potential can be recapitulated by human induced pluripotent stem cells (hiPSCs) in vitro. The differentiation capacity of hiPSCs is characterized by several stages with distinct morphologies and the expression of various marker molecules. We used the monoclonal antibodies (mAbs) 487.sup.LeX, 5750.sup.LeX and 473HD to analyze the expression pattern of particular carbohydrate motifs as potential markers at six differentiation stages of hiPSCs. Mouse ESCs were used as a comparison. At the pluripotent stage, 487.sup.LeX-, 5750.sup.LeX- and 473HD-related glycans were differently expressed. Later, cells of the three germ layers in embryoid bodies (hEBs) and, even after neuralization of hEBs, subpopulations of cells were labeled with these surface antibodies. At the human rosette-stage of NSCs (hR-NSC), LeX- and 473HD-related epitopes showed antibody-specific expression patterns. We also found evidence that these surface antibodies could be used to distinguish the hR-NSCs from the hSR-NSCs stages. Characterization of hNSCs.sup.FGF-2/EGF derived from hSR-NSCs revealed that both LeX antibodies and the 473HD antibody labeled subpopulations of hNSCs.sup.FGF-2/EGF. Finally, we identified potential LeX carrier molecules that were spatiotemporally regulated in early and late stages of differentiation. Our study provides new insights into the regulation of glycoconjugates during early human stem cell development. The mAbs 487.sup.LeX, 5750.sup.LeX and 473HD are promising tools for identifying distinct stages during neural differentiation.
Author(s): Majury Kandasamy [sup.1] , Lars Roll [sup.1] , Daniel Langenstroth [sup.1] , Oliver Brüstle [sup.2] , Andreas Faissner [sup.1] Author Affiliations: (1) 0000 0004 0490 981Xgrid.5570.7Department of Cell Morphology [...]