RRC ID 43600
Author El-Hagrasy MA, Shimizu E, Saito M, Yamaguchi Y, Tamiya E.
Title Discrimination of primitive endoderm in embryoid bodies by Raman microspectroscopy.
Journal Anal Bioanal Chem
Abstract Embryoid bodies (EBs), derived from aggregated embryonic stem (ES) cells, are capable of differentiating into all three germ layers, including the endoderm, mesoderm, and ectoderm. The initial stage of EB differentiation is the formation of a primitive endoderm (PE) layer located at the periphery of the aggregate. Raman microspectroscopy was employed to segregate PE cells from undifferentiated ES cells. The Raman spectra of the PE cells of the periphery of EBs, formed upon the withdrawal of leukemia inhibitory factor (LIF), were compared with those of the undifferentiated ES cells of the core of cell aggregates, formed in the presence of LIF. It was noticed that the PE cells have high contents of proteins and low contents of nucleic acids, lipids, and carbohydrates compared with ES cells. Also, we established the presence of another population of PE cells located in the core of the EBs. In addition, we identified some specific Raman markers to distinguish PE cells from ES cells (e.g., I(1003)/I(937)). This is the first study to investigate the PE cells of live EBs and define some Raman markers to distinguish them from undifferentiated ES cells.
Volume 402(3)
Pages 1073-81
Published 2012-1-1
DOI 10.1007/s00216-011-5554-6
PMID 22101464
MeSH Animals Cell Differentiation Cell Line Embryoid Bodies / cytology* Embryoid Bodies / metabolism Endoderm / cytology* Endoderm / metabolism Leukemia Inhibitory Factor / metabolism* Mice Spectrum Analysis, Raman / methods*
IF 3.637
Times Cited 9
Human and Animal Cells