Diversity of miRNAs, siRNAs, and piRNAs across 25 Drosophila cell lines

Jiayu Wen, Jaaved Mohammed, Diane Bortolamiol-Becet, Harrison Tsai, Nicolas Robine, Jakub O. Westholm, Erik Ladewig, Qi Dai, Katsutomo Okamura, Alex S. Flynt, Dayu Zhang, Justen Andrews, Lucy Cherbas, Thomas C. Kaufman, Peter Cherbas, Adam Siepel, Eric C. Lai*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

We expanded the knowledge base for Drosophila cell line transcriptomes by deeply sequencing their small RNAs. In total, we analyzed more than 1 billion raw reads from 53 libraries across 25 cell lines. We verify reproducibility of biological replicate data sets, determine common and distinct aspects of miRNA expression across cell lines, and infer the global impact of miRNAs on cell line transcriptomes. We next characterize their commonalities and differences in endo-siRNA populations. Interestingly, most cell lines exhibit enhanced TE-siRNA production relative to tissues, suggesting this as a common aspect of cell immortalization. We also broadly extend annotations of cis-NAT-siRNA loci, identifying ones with common expression across diverse cells and tissues, as well as cell-restricted loci. Finally, we characterize small RNAs in a set of ovary-derived cell lines, including somatic cells (OSS and OSC) and a mixed germline/somatic cell population (fGS/OSS) that exhibits ping-pong piRNA signatures. Collectively, the ovary data reveal new genic piRNA loci, including unusual configurations of piRNA-generating regions. Together with the companion analysis of mRNAs described in a previous study, these small RNA data provide comprehensive information on the transcriptional landscape of diverse Drosophila cell lines. These data should encourage broader usage of fly cell lines, beyond the few that are presently in common usage.

Original languageEnglish
Pages (from-to)1236-1250
Number of pages15
JournalGenome Research
Volume24
Issue number7
DOIs
Publication statusPublished - Jul 2014
Externally publishedYes

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