Discrimination of primitive endoderm in embryoid bodies by Raman microspectroscopy |
| |
Authors: | El-Hagrasy Maha A Shimizu Eiichi Saito Masato Yamaguchi Yoshinori Tamiya Eiichi |
| |
Affiliation: | (1) Photonics Advanced Research Center, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita Osaka, 565-0871, Japan;(2) Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita Osaka, 565-0871, Japan;(3) Chemistry Department, Faculty of Science, Mansoura University, New Damietta, Damietta, 3417, Egypt |
| |
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. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|