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| Status |
Public on Dec 16, 2008 |
| Title |
Antagonism of microRNA-122 in mice by systemically administered LNA-antimiR |
| Organism |
Mus musculus |
| Experiment type |
Expression profiling by array
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| Summary |
Antagonism of microRNA-122 in mice by systemically administered LNA-antimiR leads to up-regulation of a large set of predicted target mRNAs in the liver
MicroRNA-122 (miR-122) is an abundant liver-specific miRNA, implicated in fatty acid and cholesterol metabolism as well as hepatitis C viral replication. Here, we report that a systemically administered 16-nt, unconjugated LNA (locked nucleic acid)-antimiR oligonucleotide complementary to the 5' end of miR-122 leads to specific, dose-dependent silencing of miR-122 and shows no hepatotoxicity in mice. Antagonism of miR-122 is due to formation of stable heteroduplexes between the LNA-antimiR and miR-122 as detected by northern analysis. Fluorescence in situ hybridization demonstrated uptake of the LNA-antimiR in mouse liver cells, which was accompanied by markedly reduced hybridization signals for mature miR-122 in treated mice. Functional antagonism of miR-122 was inferred from a low cholesterol phenotype and de-repression within 24 h of 199 liver mRNAs showing significant enrichment for miR-122 seed matches in their 3' UTRs. Expression profiling extended to 3 weeks after the last LNA-antimiR dose revealed that most of the changes in liver gene expression were normalized to saline control levels coinciding with normalized miR-122 and plasma cholesterol levels. Combined, these data suggest that miRNA antagonists comprised of LNA are valuable tools for identifying miRNA targets in vivo and for studying the biological role of miRNAs and miRNA-associated gene-regulatory networks in a physiological context.
Keywords: compound treatment
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| Overall design |
Female NMRI mice were treated at day 2 with either 25mg/kg antimiR-122 (SPC3372) or vehicle (saline). Mice were sacrificied at day 3, 9 and 23 and liver RNA assayed. Three biological replicates for each of the six groups.
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| Contributor(s) |
Lindow M |
| Citation(s) |
18158304 |
| |
| Submission date |
Dec 15, 2008 |
| Last update date |
Feb 11, 2019 |
| Contact name |
Morten Lindow |
| E-mail(s) |
mol@santaris.com
|
| Phone |
+45 4517 9867
|
| URL |
http://www.santaris.com
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| Organization name |
Santaris Pharma A/S
|
| Department |
microRNA
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| Street address |
Bøge Alle 3
|
| City |
Hørsholm |
| ZIP/Postal code |
2970 |
| Country |
Denmark |
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| Platforms (1) |
| GPL1261 |
[Mouse430_2] Affymetrix Mouse Genome 430 2.0 Array |
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| Samples (21)
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| Relations |
| BioProject |
PRJNA110285 |
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