Cited by 30MicroRNA in disease regulationCancer-related molecular mechanisms researchGene expression and cancer classification

Bioinformatic Interrogation of 5p-arm and 3p-arm Specific miRNA Expression Using TCGA Datasets

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Kuo, Wei-Ting, Su, Ming-Wei, Lee, Yungling, Chen, Chien-Hsiun, Wu, Chew-Wun, Fang, Wen-Liang, Huang, Kuo-Hung, Lin, Wen-chang·2015·Journal of Clinical Medicine

Abstract

MicroRNAs (miRNAs) play important roles in cellular functions and developmental processes. They are also implicated in oncogenesis mechanisms and could serve as potential cancer biomarkers. Using high-throughput miRNA sequencing information, expression of both the 5p-arm and 3p-arm mature miRNAs were demonstrated and generated from the single miRNA hairpin precursor. However, current miRNA annotations lack comprehensive 5p-arm/3p-arm feature annotations. Among known human mature miRNAs, only half of them are annotated with arm features. This generated ambiguous results in many miRNA-Sequencing (miRNA-Seq) studies. In this report, we have interrogated the TCGA (the Cancer Genome Atlas) miRNA expression datasets with an improved, fully annotated human 5p-arm and 3p-arm miRNA reference list. By utilizing this comprehensive miRNA arm-feature annotations, enhanced determinations and clear annotations were achieved for the miRNA isoforms (isomiRs) recognized from the sequencing reads. In the gastric cancer (STAD) dataset, as an example, 32 5p-arm/3p-arm OPEN ACCESS J. Clin. Med. 2015, 4 1799 specific miRNAs were found to be down-regulated and 24 5p-arm/3p-arm specific miRNAs were found to be up-regulated. We have further extended miRNA biomarker discoveries to additional TCGA miRNA-Seq datasets and provided extensive expression information on 5p-arm/3p-arm miRNAs across multiple cancer types. Our results identified several miRNAs that could be potential common biomarkers for human cancers.

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Authors
Kuo, W.-T., Su, M.-W., Lee, Y., Chen, C.-H., Wu, C.-W., Fang, W.-L., Huang, K.-H., & Lin, W.-C.
Affiliations
  • Institute of Biomedical Sciences, Academia Sinica (TW)
  • National Taiwan University (TW)
  • Taipei Veterans General Hospital (TW)
Corresponding author
Lin, Wen-chang
Venue
Journal of Clinical Medicine
Publisher
MDPI AG
Published
2015-09-15
Volume
4
Issue
9
Pages
1798-1814
ISSN
2077-0383 (ISSN-L)
OpenAlex
W1883804424
Cited by
30
References
50
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 5 · 2016: 10
FWCI
1.89
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Medicine (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Academia Sinica
  • Ministry of Science and Technology, Taiwan
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene expression and cancer classification
Keywords
microRNA, miRNA isoforms, isomiRs, microRNA expression, tumor markers, gastric cancer

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