A systematic comparison and evaluation of high density exon arrays and RNA-seq technology used to unravel the peripheral blood transcriptome of sickle cell disease

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• 作者：Nalini Raghavachari (1)
  Jennifer Barb (2)
  Yanqin Yang (1)
  Poching Liu (1)
  Kimberly Woodhouse (1)
  Daniel Levy (4) (5)
  Christopher J O’Donnell (4) (6)
  Peter J Munson (2)
  Gregory J Kato (3)
  
• 关键词：Sickle cell disease ; RNA ; Seq ; Exon arrays ; Transcriptome ; Clinical genomics
• 刊名：BMC Medical Genomics
• 出版年：2012
• 出版时间：December 2012
• 年：2012
• 卷：5
• 期：1
• 全文大小：1483KB
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  39. The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1755-8794/5/28/prepub
  
• 作者单位：Nalini Raghavachari (1)
  Jennifer Barb (2)
  Yanqin Yang (1)
  Poching Liu (1)
  Kimberly Woodhouse (1)
  Daniel Levy (4) (5)
  Christopher J O’Donnell (4) (6)
  Peter J Munson (2)
  Gregory J Kato (3)
  
  1. Genomics Core Facility, Genetics and Development Biology, NHLBI, The National Institutes of Health, 10 Center Drive, Bldg 10, 8C 103B, Bethesda, 20892, USA
  2. Mathematical and Statistical computing Laboratory, Center for Information Technology, National Institutes of Health, Bethesda, MD, USA
  4. The National Heart, Lung, and Blood Institute’s Framingham Heart Study, Framingham, MA, USA
  5. The Center for Population Studies and the Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
  6. The Center for Cardiovascular Genomics and the Division of Intramural Research, National Heart, Lung, and Blood Institute, Bethesda, MD, USA
  3. Hematology Branch, National Institutes of Health, Bethesda, MD, USA
  
• ISSN：1755-8794

文摘

Background Transcriptomic studies in clinical research are essential tools for deciphering the functional elements of the genome and unraveling underlying disease mechanisms. Various technologies have been developed to deduce and quantify the transcriptome including hybridization and sequencing-based approaches. Recently, high density exon microarrays have been successfully employed for detecting differentially expressed genes and alternative splicing events for biomarker discovery and disease diagnostics. The field of transcriptomics is currently being revolutionized by high throughput DNA sequencing methodologies to map, characterize, and quantify the transcriptome. Methods In an effort to understand the merits and limitations of each of these tools, we undertook a study of the transcriptome in sickle cell disease, a monogenic disease comparing the Affymetrix Human Exon 1.0 ST microarray (Exon array) and Illumina’s deep sequencing technology (RNA-seq) on whole blood clinical specimens. Results Analysis indicated a strong concordance (R--.64) between Exon array and RNA-seq data at both gene level and exon level transcript expression. The magnitude of differential expression was found to be generally higher in RNA-seq than in the Exon microarrays. We also demonstrate for the first time the ability of RNA-seq technology to discover novel transcript variants and differential expression in previously unannotated genomic regions in sickle cell disease. In addition to detecting expression level changes, RNA-seq technology was also able to identify sequence variation in the expressed transcripts. Conclusions Our findings suggest that microarrays remain useful and accurate for transcriptomic analysis of clinical samples with low input requirements, while RNA-seq technology complements and extends microarray measurements for novel discoveries.