The Concordance of RNA-seq and Microarray is Dependent on Chemical Treatment and Transcript AbundanceWednesday, 30 September 2015 at 11:30 Add to Calendar ▼2015-09-30 11:30:002015-09-30 12:30:00Europe/LondonThe Concordance of RNA-seq and Microarray is Dependent on Chemical Treatment and Transcript AbundanceNGS, SCA, Mass Spec: The Road to Diagnostics in San Diego, California, USASan Diego, California, USASELECTBIOenquiries@selectbiosciences.com Next-generation sequencing technologies have revolutionized the genomic research and allow the genome and transcriptome of any organism to be explored without a priori assumptions and with unprecedented throughput. However, the concordance of RNA-sequencing (RNA-seq) with microarrays for genome-wide analysis of differential gene expression has not been rigorously assessed using a range of chemical treatment conditions. Here we use a comprehensive study design to generate Illumina RNA-seq and Affymetrix microarray data from the same liver samples of rats exposed to varying degrees of perturbation by 27 chemicals representing multiple modes of action (MOAs). The cross-platform concordance in terms of differentially expressed genes (DEGs) or enriched pathways is linearly correlated with treatment effect size (R2˜0.8). Furthermore, the concordance is also affected by transcript abundance and biological complexity of the MOA. RNA-seq outperforms microarray (93% versus 75%) in DEG verification as assessed by quantitative RT-PCR, with the gain mainly due to its improved accuracy for low-abundance transcripts. |