Proteomic Profiling of Rabbit Embryonic Stem Cells Derived from Parthenotes and Fertilized Embryos

• Published in: PloS one Vol. 8; no. 7; p. e67772
• Main Authors: Intawicha, Payungsuk, Wang, Shih-Han, Hsieh, Ya-Chen, Lo, Neng-Wen, Lee, Kun-Hsiung, Huang, San-Yuan, Ju, Jyh-Cherng
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 04.07.2013; Public Library of Science (PLoS)
• Subjects: 14-3-3 protein; Agricultural biotechnology; Analysis; Animal sciences; Animals; Biology; Biomarkers - metabolism; Cancer; Catalysis; Cell Differentiation; Cell Lineage - genetics; Cellular structure; Compartments; Cytoskeletal Proteins - genetics; Cytoskeletal Proteins - metabolism; Cytoskeleton; Electrophoresis, Gel, Two-Dimensional; Embryo cells; Embryo, Mammalian; Embryonic stem cells; Embryonic Stem Cells - cytology; Embryonic Stem Cells - metabolism; Embryos; Female; Fibroblasts; Fibroblasts - cytology; Fibroblasts - metabolism; Gel electrophoresis; Gene expression; Gene Expression Profiling; Gene Expression Regulation, Developmental; Genomics; Heat shock proteins; Hsp60 protein; Leukemia; Male; Mass spectrometry; Mass spectroscopy; Metabolic Networks and Pathways - genetics; Metabolic pathways; Molecular Motor Proteins - genetics; Molecular Motor Proteins - metabolism; Molecular Sequence Annotation; Myosin; Nuclei; Parthenogenesis - genetics; Phosphopyruvate hydratase; Protein expression; Proteins; Proteomics; Rabbits; Signal Transduction; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; Spots; Stem cells; Transduction; Two dimensional analysis; Veterinary Science; Western blotting; Zoology; Taiwan
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0067772

Rabbit embryonic stem (rES) cells can be derived from various sources of embryos. However, understanding of the gene expression profile, which distincts embryonic stem (ES) cells from other cell types, is still extremely limited. In this study, we compared the protein profiles of three independent lines of rabbit cells, i.e., fibroblasts, fertilized embryo-derived stem (f-rES) cells, and parthenote-derived ES (p-rES) cells. Proteomic analyses were performed using two-dimensional gel electrophoresis (2-DE) and mass spectrometry. Collectively, the expression levels of 100 out of 284 protein spots differed significantly among these three cell types (p<0.05). Of those differentially expressed spots, 91% were identified in the protein database and represented 63 distinct proteins. Proteins with known identities are mainly localized in the cytoplasmic compartments (48%), nucleus (14%), and cytoskeletal machineries (13%). These proteins were majorly involved in biological functions of energy and metabolic pathways (25%), cell growth and maintenance (25%), signal transduction (14%), and protein metabolisms (10%). When protein expression levels among cell types were compared, six proteins associated with a variety of cellular activities, including structural constituents of the cytoskeleton (tubulins), structural molecule (KRT8), catalytic molecules (α-enolase), receptor complex scaffold (14-3-3 protein sigma), microfilament motor proteins (Myosin-9), and heat shock protein (HSP60), were found highly expressed in p-rES cells. Two proteins related to HSP activity and structural constituent of cytoskeleton in f-rES cells, and one structural molecule activity protein in fibroblasts showed significantly higher expression levels (p<0.05). Marker protein expressions in f-rES and p-rES cells were further confirmed by Western blotting and immunocytochemical staining. This study demonstrated unique proteomic profiles of the three rabbit cell types and revealed some novel proteins differentially expressed between f-rES and p-rES cells. These analyses provide insights into rES cell biology and would invite more in-depth studies toward rES cell applications.