Cited by 71MicroRNA in disease regulationGene expression and cancer classificationMolecular Biology Techniques and Applications

The use of miRNA microarrays for the analysis of cancer samples with global miRNA decrease

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Wu, Di, Hu, Yifang, Tong, Stephen, Williams, Bryan R.G., Smyth, Gordon K., Gantier, Michael P.·2013·RNA

Abstract

Recent studies have established that mutations or deletions in microRNA (miRNA) processing enzymes resulting in a global decrease of miRNA expression are frequent across cancers and can be associated with a poorer prognosis. While very popular in miRNA profiling studies, it remains unclear whether miRNA microarrays are suited or not to accurately detecting global miRNA decreases seen in cancers. In this work, we analyzed the miRNA profiles of samples with global miRNA decreases using Affymetrix miRNA microarrays following the inducible genetic deletion of Dicer1. Surprisingly, up to a third of deregulated miRNAs identified upon Dicer1 depletion were found to be up-regulated following standard robust multichip average (RMA) background correction and quantile normalization, indicative of normalization bias. Our comparisons of five preprocess steps performed at the probe level demonstrated that the use of cyclic loess relying on non-miRNA small RNAs present on the Affymetrix platform significantly improved specificity and sensitivity of detection of decreased miRNAs. These findings were validated in samples from patients with prostate cancer, where conjugation of robust normal-exponential background correction with cyclic loess normalization and array weights correctly identified the greatest number of decreased miRNAs, and the lowest amount of false-positive up-regulated miRNAs. These findings highlight the importance of miRNA microarray normalization for the detection of miRNAs that are truly differentially expressed and suggest that the use of cyclic loess based on non-miRNA small RNAs can help to improve the sensitivity and specificity of miRNA profiling in cancer samples with global miRNA decrease.

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Crossref · 10.1261/rna.035055.112

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  • This weighting ability has been exploited for normalizing assays when the proportion of differentially expressed genes may be high, for example boutique arrays, miRNA arrays, PCR arrays, protein arrays or protein mass spectrometry.

    “The latter ability has been exploited for normalizing assays when the proportion of differentially expressed genes may be high, for example boutique arrays (39), miRNA arrays (40), PCR arrays, protein arrays or protein mass spectrometry.”

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  1. Bolstad BM 2004 “ Low level analysis of high-density oligonucleotide array data: Background, normalization and summarization.” Ph.D. dissertation, University of California, Berkeley, CA

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Authors
Wu, D., Hu, Y., Tong, S., Williams, B. R. G., Smyth, G. K., & Gantier, M. P.
Affiliations
  • Harvard University (US)
  • Walter and Eliza Hall Institute of Medical Research (AU)
  • The University of Melbourne (AU)
  • Monash University (AU)
Corresponding author
Gantier, Michael P.
Venue
RNA
Published
2013-05-24
Volume
19
Issue
7
Pages
876-888
ISSN
  • 1355-8382 (ISSN-L)
  • 1469-9001
OpenAlex
W2107706017
Cited by
71
References
51
Citations by year
2026: 3 · 2025: 4 · 2024: 5 · 2023: 2 · 2022: 5 · 2021: 3 · 2020: 2 · 2019: 6 · 2018: 8 · 2017: 10 · 2016: 10 · 2015: 5 · 2014: 8
FWCI
2.69
Type
journal article
Language
en
Open access
Locations
  • RNA (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by-nc)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • State Government of Victoria
  • Medical Research Council
  • National Health and Medical Research Council (1006590, 490970, 1022144)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene expression and cancer classification
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Molecular Biology Techniques and Applications
Keywords
miRNA microarray, miRNA expression profiling, normalization bias, prostate cancer
MeSH terms
Animals, Fibroblasts, Humans, Male, Prostatic Neoplasms, RNA, Neoplasm, Sensitivity and Specificity, RNA Probes, Down-Regulation, Up-Regulation, Gene Expression Regulation, Neoplastic, Gene Deletion, Computational Biology, Oligonucleotide Array Sequence Analysis, MicroRNAs, Ribonuclease III, Mice, DEAD-box RNA Helicases

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