| HGNC Family | Non-coding RNAs |
| Name | microRNA 181b-1 |
| Description | microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009] |
| Summary |
{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nThe MIR181B1 gene, which gives rise to mature miR‐181b, has emerged as a multifaceted regulator whose activity is highly context‐dependent. In certain inflammatory and transformation settings, MIR181B1 is rapidly induced downstream of IL‐6/STAT3 signaling, thereby contributing to an epigenetic switch that converts nontransformed cells into a tumorigenic state via a positive feedback loop—partly through the inhibition of key tumor suppressors such as CYLD. In colon cancer models, transient induction of miR‐181b‐1 cooperates with other STAT3‐activated microRNAs to sustain NF‐κB activity and the transformed phenotype."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn hematologic malignancies, the expression of MIR181B1–derived miR‐181b is of particular importance. In acute myeloid leukemia (AML), higher circulating levels correlate with favorable overall survival and its ectopic expression can promote apoptosis and chemosensitivity—principally by targeting anti‐apoptotic factors such as PBX3, HMGB1, and Mcl‐1. Similarly, in chronic lymphocytic leukemia (CLL), declining miR‐181b levels are associated with disease progression."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "3", "end_ref": "7"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn several central nervous system tumor models, including gliomas and glioblastoma multiforme, miR‐181b generally functions as a tumor suppressor. Reduced levels in tumor tissues correlate with increased proliferation, migration, invasion and resistance to therapy; mechanistic studies have shown that miR‐181b may inhibit oncogenic drivers such as IGF‐1R or modulate networks involving FOS and miR‐21, and even suppress epithelial–mesenchymal transitions through KPNA4 targeting. Such observations underline its potential utility as both a prognostic biomarker and a therapeutic candidate in malignant brain tumors."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "8", "end_ref": "14"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn the context of other solid tumors, MIR181B1 displays dual roles. In cervical and gastric cancers, as well as in thyroid papillary and ovarian cancers, elevated miR‐181b expression can promote cell proliferation, migration, and invasion by targeting tumor suppressors like AC9 or CYLD and by facilitating TGF‐β–mediated epithelial–mesenchymal transition. In neuroblastoma, its overexpression correlates with MYCN amplification and aggressive behavior, while in non–small cell lung cancer it has been implicated in driving EMT and metastasis."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "15", "end_ref": "21"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond cancer, MIR181B1 plays significant roles in non‐malignant conditions. In the liver, miR‐181b is induced by TGF‐β1 in hepatic stellate cells—promoting cell cycle progression by directly targeting molecules such as p27 and PTEN; these actions contribute to liver cirrhosis, fibrosis, and even non‐alcoholic fatty liver disease through modulation of lipid metabolism (and SIRT1 expression). In cartilage, its upregulation in osteoarthritic chondrocytes correlates with enhanced expression of matrix metalloproteinases and cartilage breakdown. Moreover, in cardiovascular settings, its elevated expression in the fibrosa of calcified aortic valves and its association with increased matrix‐degrading activity suggest a role in vascular remodeling. MIR181B1 is further implicated in modulating inflammatory responses—for instance, by promoting TNF‐α mRNA decay in sepsis and by dampening IFN‐γ production in immune cells. These diverse functions have also been linked to alterations in metabolic and endocrine pathways, as revealed in type 2 diabetes mellitus ceRNA network studies."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "22", "end_ref": "35"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nFinally, in the neuropsychiatric realm, aberrantly high levels of miR‐181b have been noted in schizophrenia—with reductions following antipsychotic treatment correlating with improvement in negative symptoms and treatment responsiveness—underscoring its potential as a peripheral marker of disease severity."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "36"}]}, {"type": "t", "text": " In addition, MIR181B1 has been shown to potentiate endothelial differentiation from pluripotent stem cells, further highlighting its diverse regulatory role in vascular homeostasis."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "38"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Dimitrios Iliopoulos, Savina A Jaeger, Heather A Hirsch, et al. 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| Synonyms | MIRN181B1, MIR-181B-1 |
| NCBI Gene ID | 406955 |
| API | |
| Download Associations | |
| Predicted Functions |
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| Co-expressed Genes |
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| Expression in Tissues and Cell Lines |
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MIR181B1 has 498 functional associations with biological entities spanning 6 categories (molecular profile, disease, phenotype or trait, functional term, phrase or reference, chemical, cell line, cell type or tissue, gene, protein or microRNA) extracted from 19 datasets.
Click the + buttons to view associations for MIR181B1 from the datasets below.
If available, associations are ranked by standardized value
| Dataset | Summary | |
|---|---|---|
| CCLE Cell Line Gene CNV Profiles | cell lines with high or low copy number of MIR181B1 gene relative to other cell lines from the CCLE Cell Line Gene CNV Profiles dataset. | |
| ChEA Transcription Factor Binding Site Profiles | transcription factor binding site profiles with transcription factor binding evidence at the promoter of MIR181B1 gene from the CHEA Transcription Factor Binding Site Profiles dataset. | |
| ChEA Transcription Factor Targets | transcription factors binding the promoter of MIR181B1 gene in low- or high-throughput transcription factor functional studies from the CHEA Transcription Factor Targets dataset. | |
| COSMIC Cell Line Gene CNV Profiles | cell lines with high or low copy number of MIR181B1 gene relative to other cell lines from the COSMIC Cell Line Gene CNV Profiles dataset. | |
| ENCODE Histone Modification Site Profiles | histone modification site profiles with high histone modification abundance at MIR181B1 gene from the ENCODE Histone Modification Site Profiles dataset. | |
| ENCODE Transcription Factor Binding Site Profiles | transcription factor binding site profiles with transcription factor binding evidence at the promoter of MIR181B1 gene from the ENCODE Transcription Factor Binding Site Profiles dataset. | |
| ENCODE Transcription Factor Targets | transcription factors binding the promoter of MIR181B1 gene in ChIP-seq datasets from the ENCODE Transcription Factor Targets dataset. | |
| GAD Gene-Disease Associations | diseases associated with MIR181B1 gene in GWAS and other genetic association datasets from the GAD Gene-Disease Associations dataset. | |
| GeneRIF Biological Term Annotations | biological terms co-occuring with MIR181B1 gene in literature-supported statements describing functions of genes from the GeneRIF Biological Term Annotations dataset. | |
| GeneSigDB Published Gene Signatures | PubMedIDs of publications reporting gene signatures containing MIR181B1 from the GeneSigDB Published Gene Signatures dataset. | |
| GEO Signatures of Differentially Expressed Genes for Gene Perturbations | gene perturbations changing expression of MIR181B1 gene from the GEO Signatures of Differentially Expressed Genes for Gene Perturbations dataset. | |
| GEO Signatures of Differentially Expressed Genes for Small Molecules | small molecule perturbations changing expression of MIR181B1 gene from the GEO Signatures of Differentially Expressed Genes for Small Molecules dataset. | |
| GTEx Tissue Gene Expression Profiles | tissues with high or low expression of MIR181B1 gene relative to other tissues from the GTEx Tissue Gene Expression Profiles dataset. | |
| HuGE Navigator Gene-Phenotype Associations | phenotypes associated with MIR181B1 gene by text-mining GWAS publications from the HuGE Navigator Gene-Phenotype Associations dataset. | |
| JASPAR Predicted Transcription Factor Targets | transcription factors regulating expression of MIR181B1 gene predicted using known transcription factor binding site motifs from the JASPAR Predicted Transcription Factor Targets dataset. | |
| Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles | cell lines with high or low copy number of MIR181B1 gene relative to other cell lines from the Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles dataset. | |
| MotifMap Predicted Transcription Factor Targets | transcription factors regulating expression of MIR181B1 gene predicted using known transcription factor binding site motifs from the MotifMap Predicted Transcription Factor Targets dataset. | |
| Roadmap Epigenomics Histone Modification Site Profiles | histone modification site profiles with high histone modification abundance at MIR181B1 gene from the Roadmap Epigenomics Histone Modification Site Profiles dataset. | |
| WikiPathways Pathways 2014 | pathways involving MIR181B1 protein from the Wikipathways Pathways 2014 dataset. | |