Rxivist combines preprints from bioRxiv with data from Twitter to help you find the papers being discussed in your field. Currently indexing 59,758 bioRxiv papers from 265,632 authors.
Impact of regulatory variation across human iPSCs and differentiated cells
Nicholas E Banovich,
Yang I Li,
Michelle C Ward,
Po Yuan Tung,
Jonathan E Burnett,
Samantha M Thomas,
Courtney K Burrows,
Irene Gallego Romero,
Bryan J Pavlovic,
Jonathan K Pritchard,
Posted 05 Dec 2016
bioRxiv DOI: 10.1101/091660 (published DOI: 10.1101/gr.224436.117)
Posted 05 Dec 2016
Induced pluripotent stem cells (iPSCs) are an essential tool for studying cellular differentiation and cell types that are otherwise difficult to access. We investigated the use of iPSCs and iPSC-derived cells to study the impact of genetic variation across different cell types and as models for studies of complex disease. We established a panel of iPSCs from 58 well- studied Yoruba lymphoblastoid cell lines (LCLs); 14 of these lines were further differentiated into cardiomyocytes. We characterized regulatory variation across individuals and cell types by measuring gene expression, chromatin accessibility and DNA methylation. Regulatory variation between individuals is lower in iPSCs than in the differentiated cell types, consistent with the intuition that developmental processes are generally canalized. While most cell type-specific regulatory quantitative trait loci (QTLs) lie in chromatin that is open only in the affected cell types, we found that 20% of cell type-specific QTLs are in shared open chromatin. Finally, we developed a deep neural network to predict open chromatin regions from DNA sequence alone and were able to use the sequences of segregating haplotypes to predict the effects of common SNPs on cell type-specific chromatin accessibility.
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