Generation of a Panel of Induced Pluripotent Stem Cells From Chimpanzees: a Resource for Comparative Functional Genomics

Comparative genomics studies in primates are extremely restricted because we only have access to a few types of cell lines from non-human apes and to a limited collection of frozen tissues. In order to gain better insight into regulatory processes that underlie variation in complex phenotypes, we mu...

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Published inbioRxiv
Main Authors Irene Gallego Romero, Pavlovic, Bryan J, Hernando-Herraez, Irene, Banovich, Nicholas E, Kagan, Courtney L, Burnett, Jonathan E, Huang, Constance H, Mitrano, Amy, Chavarria, Claudia I, Ben-Nun, Inbar F, Li, Yingchun, Sabatini, Karen, Leonardo, Trevor R, Parast, Mana, Marques-Bonet, Tomas, Laurent, Louise C, Loring, Jeanne F, Gilad, Yoav
Format Paper
LanguageEnglish
Published Cold Spring Harbor Cold Spring Harbor Laboratory Press 08.09.2014
Subjects
Cell culture
Cell lines
Fibroblasts
Genomics
Pan troglodytes
Phenotypes
Phenotypic variations
Pluripotency
Ribonucleic acid
RNA
Somatic cells
Species
Stem cell transplantation
Stem cells
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Summary:Comparative genomics studies in primates are extremely restricted because we only have access to a few types of cell lines from non-human apes and to a limited collection of frozen tissues. In order to gain better insight into regulatory processes that underlie variation in complex phenotypes, we must have access to faithful model systems for a wide range of tissues and cell types. To facilitate this, we have generated a panel of 7 fully characterized chimpanzee (Pan troglodytes) induced pluripotent stem cell (iPSC) lines derived from fibroblasts of healthy donors. All lines appear to be free of integration from exogenous reprogramming vectors, can be maintained using standard iPSC culture techniques, and have proliferative and differentiation potential similar to human and mouse lines. To begin demonstrating the utility of comparative iPSC panels, we collected RNA sequencing data and methylation profiles from the chimpanzee iPSCs and their corresponding fibroblast precursors, as well as from 7 human iPSCs and their precursors, which were of multiple cell type and population origins. Overall, we observed much less regulatory variation within species in the iPSCs than in the somatic precursors, indicating that the reprogramming process has erased many of the differences observed between somatic cells of different origins. We identified 4,918 differentially expressed genes and 3,598 differentially methylated regions between iPSCs of the two species, many of which are novel inter-species differences that were not observed between the somatic cells of the two species. Our panel will help realise the potential of iPSCs in primate studies, and in combination with genomic technologies, transform studies of comparative evolution.
DOI:10.1101/008862