Cited by 971MicroRNA in disease regulationCancer-related molecular mechanisms researchCancer-related Molecular Pathways

OncomiR addiction in an in vivo model of microRNA-21-induced pre-B-cell lymphoma

Medina, Pedro P., Nolde, Mona, Slack, Frank J.·2010·Nature

Abstract

MicroRNAs (miRNAs) belong to a recently discovered class of small RNA molecules that regulate gene expression at the post-transcriptional level. miRNAs have crucial functions in the development and establishment of cell identity, and aberrant metabolism or expression of miRNAs has been linked to human diseases, including cancer. Components of the miRNA machinery and miRNAs themselves are involved in many cellular processes that are altered in cancer, such as differentiation, proliferation and apoptosis. Some miRNAs, referred to as oncomiRs, show differential expression levels in cancer and are able to affect cellular transformation, carcinogenesis and metastasis, acting either as oncogenes or tumour suppressors. The phenomenon of 'oncogene addiction' reveals that despite the multistep nature of tumorigenesis, targeting of certain single oncogenes can have therapeutic value, and the possibility of oncomiR addiction has been proposed but never demonstrated. MicroRNA-21 (miR-21) is a unique miRNA in that it is overexpressed in most tumour types analysed so far. Despite great interest in miR-21, most of the data implicating it in cancer have been obtained through miRNA profiling and limited in vitro functional assays. To explore the role of miR-21 in cancer in vivo, we used Cre and Tet-off technologies to generate mice conditionally expressing miR-21. Here we show that overexpression of miR-21 leads to a pre-B malignant lymphoid-like phenotype, demonstrating that mir-21 is a genuine oncogene. When miR-21 was inactivated, the tumours regressed completely in a few days, partly as a result of apoptosis. These results demonstrate that tumours can become addicted to oncomiRs and support efforts to treat human cancers through pharmacological inactivation of miRNAs such as miR-21.

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Crossref · 10.1038/nature09284

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Authors
Medina, P. P., Nolde, M., & Slack, F. J.
Affiliations
Yale University (US)
Corresponding author
Slack, Frank J.
Venue
Nature
Published
2010-08-08
Volume
467
Issue
7311
Pages
86-90
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2067915426
Cited by
971
References
32
Citations by year
2026: 24 · 2025: 26 · 2024: 31 · 2023: 30 · 2022: 43 · 2021: 47 · 2020: 47 · 2019: 63 · 2018: 55 · 2017: 68 · 2016: 67 · 2015: 88 · 2014: 89 · 2013: 94 · 2012: 104
FWCI
26.27
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
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
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
miR-21, pre-B cell lymphoma, oncogene addiction, apoptosis, tumor regression, post-transcriptional regulation, miRNA-based therapy
MeSH terms
Animals, Mice, Inbred C57BL, Mice, Transgenic, Lymphoma, B-Cell, MicroRNAs, Mice, Precursor Cells, B-Lymphoid

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