TY - JOUR
T1 - Comparative proteomics of human embryonic stem cells and embryonal carcinoma cells
AU - Chaerkady, Raghothama
AU - Kerr, Candace L.
AU - Kandasamy, Kumaran
AU - Marimuthu, Arivusudar
AU - Gearhart, John D.
AU - Pandey, Akhilesh
PY - 2010/4
Y1 - 2010/4
N2 - Pluripotent human embryonic stem cells (ESCs) can be differentiated in vitro into a variety of cells which hold promise for transplantation therapy. Human embryonal carcinoma cells (ECCs), stem cells of human teratocarcinomas, are considered a close but malignant counterpart to human ESCs. In this study, a comprehensive quantitative proteomic analysis of ESCs and ECCs was carried out using the iTRAQ method. Using two-dimensional LC and MS/M S analyses, we identified and quantitated ∼1800 proteins. Among these are proteins associated with pluripotency and development as well as tight junction signaling and TGFß receptor pathway. Nearly ∼200 proteins exhibit more than twofold difference in abundance between ESCs and ECCs. Examples of early developmental markers high in ESCs include β-galactoside-binding lectin, undifferentiated embryonic cell transcription factor-1, DNA cytosine methyltransferase 3β isoform-B, melanoma antigen family-A4, and interferon-induced transmembrane protein-1. In contrast, CD99-antigen (CD99), growth differentiation factor-3, cellular retinoic acid binding protein-2, and developmental pluripotency associated-4 were among the highly expressed proteins in ECCs. Several proteins that were highly expressed in ECCs such as heat shock 27kDa protein-1, mitogen-activated protein kinase kinase-1, nuclear factor of K light polypeptide gene enhancer in B-cells inhibitor like-2, and S100 calcium-binding protein-A4 have also been attributed to malignancy in other systems. Importantly, immunocytochemistry was used to validate the proteomic analyses for a subset of the proteins. In summary, this is the first large-scale quantitative proteomic study of human ESCs and ECCs, which provides critical information about the regulators of these two closely related, but developmentally distinct, stem cells.
AB - Pluripotent human embryonic stem cells (ESCs) can be differentiated in vitro into a variety of cells which hold promise for transplantation therapy. Human embryonal carcinoma cells (ECCs), stem cells of human teratocarcinomas, are considered a close but malignant counterpart to human ESCs. In this study, a comprehensive quantitative proteomic analysis of ESCs and ECCs was carried out using the iTRAQ method. Using two-dimensional LC and MS/M S analyses, we identified and quantitated ∼1800 proteins. Among these are proteins associated with pluripotency and development as well as tight junction signaling and TGFß receptor pathway. Nearly ∼200 proteins exhibit more than twofold difference in abundance between ESCs and ECCs. Examples of early developmental markers high in ESCs include β-galactoside-binding lectin, undifferentiated embryonic cell transcription factor-1, DNA cytosine methyltransferase 3β isoform-B, melanoma antigen family-A4, and interferon-induced transmembrane protein-1. In contrast, CD99-antigen (CD99), growth differentiation factor-3, cellular retinoic acid binding protein-2, and developmental pluripotency associated-4 were among the highly expressed proteins in ECCs. Several proteins that were highly expressed in ECCs such as heat shock 27kDa protein-1, mitogen-activated protein kinase kinase-1, nuclear factor of K light polypeptide gene enhancer in B-cells inhibitor like-2, and S100 calcium-binding protein-A4 have also been attributed to malignancy in other systems. Importantly, immunocytochemistry was used to validate the proteomic analyses for a subset of the proteins. In summary, this is the first large-scale quantitative proteomic study of human ESCs and ECCs, which provides critical information about the regulators of these two closely related, but developmentally distinct, stem cells.
KW - Cell biology
KW - Embryonal carcinoma cell
KW - Embryonic stem cell
KW - Itraq
KW - MS
KW - Quantitative proteomics
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UR - http://www.scopus.com/inward/citedby.url?scp=77950630968&partnerID=8YFLogxK
U2 - 10.1002/pmic.200900483
DO - 10.1002/pmic.200900483
M3 - Article
C2 - 20104618
AN - SCOPUS:77950630968
SN - 1615-9853
VL - 10
SP - 1359
EP - 1373
JO - Proteomics
JF - Proteomics
IS - 7
ER -