@article{edb64dd8120b4771b4cb81b95cb2ca59,
title = "Analysis of Transcriptional Variability in a Large Human iPSC Library Reveals Genetic and Non-genetic Determinants of Heterogeneity",
abstract = "Variability in induced pluripotent stem cell (iPSC) lines remains a concern for disease modeling and regenerative medicine. We have used RNA-sequencing analysis and linear mixed models to examine the sources of gene expression variability in 317 human iPSC lines from 101 individuals. We found that ∼50\% of genome-wide expression variability is explained by variation across individuals and identified a set of expression quantitative trait loci that contribute to this variation. These analyses coupled with allele-specific expression show that iPSCs retain a donor-specific gene expression pattern. Network, pathway, and key driver analyses showed that Polycomb targets contribute significantly to the non-genetic variability seen within and across individuals, highlighting this chromatin regulator as a likely source of reprogramming-based variability. Our findings therefore shed light on variation between iPSC lines and illustrate the potential for our dataset and other similar large-scale analyses to identify underlying drivers relevant to iPSC applications.",
keywords = "allelic imbalance, differentiation variability, eQTL, iPSC library, key drivers, network analysis, Polycomb targets, transcriptional variability, variance partition",
author = "Ivan Carcamo-Orive and Hoffman, \{Gabriel E.\} and Paige Cundiff and Beckmann, \{Noam D.\} and D'Souza, \{Sunita L.\} and Knowles, \{Joshua W.\} and Achchhe Patel and Dimitri Papatsenko and Fahim Abbasi and Reaven, \{Gerald M.\} and Sean Whalen and Philip Lee and Mohammad Shahbazi and Marc Henrion and Kuixi Zhu and Sven Wang and Panos Roussos and Schadt, \{Eric E.\} and Gaurav Pandey and Rui Chang and Thomas Quertermous and Ihor Lemischka",
year = "2017",
month = apr,
day = "6",
doi = "10.1016/j.stem.2016.11.005",
language = "English",
volume = "20",
pages = "518--532.e9",
journal = "Cell Stem Cell",
issn = "1934-5909",
publisher = "Cell Press",
number = "4",
}