The Quantitative Proteomes of Human-induced Pluripotent Stem Cells and Embryonic Stem Cells

Overview

Journal Mol Syst Biol

Specialty Molecular Biology

Date 2011 Nov 24

PMID 22108792

Citations 59

Authors

Javier Munoz

Teck Y Low

Yee J Kok

Angela Chin

Christian K Frese

Vanessa Ding

Andre Choo

Albert J R Heck

Affiliations

Soon will be listed here.

Abstract

Assessing relevant molecular differences between human-induced pluripotent stem cells (hiPSCs) and human embryonic stem cells (hESCs) is important, given that such differences may impact their potential therapeutic use. Controversy surrounds recent gene expression studies comparing hiPSCs and hESCs. Here, we present an in-depth quantitative mass spectrometry-based analysis of hESCs, two different hiPSCs and their precursor fibroblast cell lines. Our comparisons confirmed the high similarity of hESCs and hiPSCS at the proteome level as 97.8% of the proteins were found unchanged. Nevertheless, a small group of 58 proteins, mainly related to metabolism, antigen processing and cell adhesion, was found significantly differentially expressed between hiPSCs and hESCs. A comparison of the regulated proteins with previously published transcriptomic studies showed a low overlap, highlighting the emerging notion that differences between both pluripotent cell lines rather reflect experimental conditions than a recurrent molecular signature.

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