High-throughput assessment of microRNA activity and function using microRNA sensor and decoy libraries
Open accessAbstract
We introduce two large-scale resources for functional analysis of microRNA (miRNA): a decoy library for inhibiting miRNA function and a sensor library for monitoring microRNA activity. To take advantage of the sensor library, we developed a high-throughput assay called Sensor-seq to simultaneously quantify the activity of hundreds of miRNAs. Using this approach, we show that only the most abundant miRNAs in a cell mediate target suppression. Over 60% of detected miRNAs had no discernible activity, which indicated that the functional 'miRNome' of a cell is considerably smaller than currently inferred from profiling studies. Moreover, some highly expressed miRNAs exhibited relatively weak activity, which in some cases correlated with a high target-to-miRNA ratio or increased nuclear localization of the miRNA. Finally, we show that the miRNA decoy library can be used for pooled loss-of-function studies. These tools are valuable resources for studying miRNA biology and for miRNA-based therapeutics.
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This number of new microRNAs seems impossibly high and likely mostly false positives and/or nonfunctional transcripts.
“This number of new microRNAs seems impossibly high and likely mostly false positives and/or nonfunctional transcripts (Mullokandov et al. 2012).”
From Toward the human cellular microRNAome (2017) · cites this paper as Mullokandov et al. 2012
The Discussion (page unavailable in our copy) reports that almost 60% of miRNAs detected in the cells studied had no discernible suppressive activity, supporting concern that many detected miRNAs may have little biological activity. It does not assess the number of *new* miRNAs or conclude that most are false-positive identifications. The Results’ reference to possible false positives concerns a small set of sensor results, not the miRNA transcripts themselves. (LLM, conf=0.87)
Experimental — accuracy not yet measuredmiRNA inhibition using decoy or sponge-like constructs has potential therapeutic benefit.
“It has already been shown that miRNA inhibition using decoy or sponge-like constructs have a potential therapeutic benefit.”
From Potential Therapeutic Effects of Exosomes Packed With a miR-21-Sponge Construct in a Rat Model of Glioblastoma (2019) · cites this paper as [30]
Sponge constructs are designed to bind complementary miRNA(s) or their seed sequences, and hence block the binding of the miRNA to its biological targets.
“The sponge construct are designed to bind its complementary miRNA(s) or their seed sequences, and hence block the binding of the miRNA to its biological targets (29–31).”
From Potential Therapeutic Effects of Exosomes Packed With a miR-21-Sponge Construct in a Rat Model of Glioblastoma (2019) · cites this paper as [30]
Using decoy or sponge-like constructs for miRNA inhibition has been shown to bind complementary miRNA(s) or their seed sequences and block their effects.
“Using decoy or sponge-like constructs for miRNA inhibition have been already shown before with good effect in binding to its complementary miRNA(s) or their seed sequences and blocking their effects (29–31, 56, 57).”
From Potential Therapeutic Effects of Exosomes Packed With a miR-21-Sponge Construct in a Rat Model of Glioblastoma (2019) · cites this paper as [30]
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References 47 · Cited by 394
Research works printed but not linked: 41
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- Authors
- Mullokandov, G., Baccarini, A., Ruzo, A., Jayaprakash, A. D., Tung, N., Israelow, B., Evans, M. J., Sachidanandam, R., & Brown, B. D.
- Affiliations
- Icahn School of Medicine at Mount Sinai (US)
- Corresponding author
- Brown, Brian D
- ORCID
- Venue
- Nature Methods
- Published
- 2012-07-01
- Volume
- 9
- Issue
- 8
- Pages
- 840-846
- ISSN
- 1548-7091 (ISSN-L)
- 1548-7105
- PMC
- PMC3518396
- OpenAlex
- W1973401140
- Cited by
- 394
- References
- 47
- Citations by year
- 2026: 16 · 2025: 24 · 2024: 13 · 2023: 20 · 2022: 16 · 2021: 25 · 2020: 22 · 2019: 19 · 2018: 31 · 2017: 49 · 2016: 44 · 2015: 48 · 2014: 35 · 2013: 28 · 2012: 4
- FWCI
- 12.21
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature Methods (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (1dp2dk083052-01)
- National Institute of Allergy and Infectious Diseases (R56AI091792)
- National Institute of Diabetes and Digestive and Kidney Diseases (DP2DK083052‑01, R01DK095125, DP2DK083052)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
- Keywords
- microRNA function, loss-of-function screen, miRNome, miRNA abundance, miRNA-based therapy
- MeSH terms
- Animals, Genetic Vectors, Humans, Biosensing Techniques, Gene Library, MicroRNAs, High-Throughput Screening Assays
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