MIR126 Gene

HGNC Family Non-coding RNAs
Name microRNA 126
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": "\nmiR‐126 is an endothelial‐enriched microRNA processed from an intron of the EGFL7 gene that plays a pivotal role in maintaining vascular integrity and modulating angiogenesis. It is induced by key transcription factors—such as Ets‐1 and Ets‐2—that promote its expression in endothelial cells, where miR‐126 not only limits vascular inflammation by suppressing adhesion molecules like VCAM‐1 but also targets central angiogenic mediators such as VEGF‐A and the PI3K regulatory subunit PIK3R2. Notably, while its actions in endothelial cells are well established, its function in smooth muscle cells remains to be clarified."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn a variety of malignancies—including lung, colon, gastric, pancreatic, and breast cancers—miR‐126 commonly exhibits reduced expression, and its restoration exerts potent tumor‐suppressive effects. In lung cancer, miR‐126 diminishes oncogenic signals by targeting the adaptor protein Crk"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": "and by down‐regulating VEGF‐A"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "6"}]}, {"type": "t", "text": ", whereas in colon cancer re‐expression of miR‐126 curtails cell proliferation through suppression of p85β and subsequent attenuation of PI3K/AKT signaling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": " In breast cancer, enforced miR‐126 levels promote cell cycle arrest via targeting IRS‐1"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "8"}]}, {"type": "t", "text": ", and in small cell lung cancer, miR‐126 limits proliferation by directly repressing SLC7A5."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": " In pancreatic cancer, by targeting ADAM9"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": "and in metastatic breast cancer by inhibiting pro‐angiogenic factors such as IGFBP2, PITPNC1, and MERTK"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "11"}]}, {"type": "t", "text": "and"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "12"}]}, {"type": "t", "text": ", miR‐126 limits tumor invasiveness and metastatic colonization. Furthermore, in non‐small cell lung cancer, its re‐expression enhances chemosensitivity by down‐regulating VEGF‐A and MRP1"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": ", and in acute myeloid leukemia miR‐126 helps preserve stem cell quiescence and contributes to chemotherapy resistance via modulation of PI3K/AKT/mTOR signaling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "14"}]}, {"type": "t", "text": " In addition, circulating miR‐126 has emerged as a promising noninvasive biomarker for colorectal cancer."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "15"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nClinical studies have demonstrated that miR‐126 levels in the circulation serve as key indicators of endothelial health and metabolic status. Reduced circulating miR‐126 is associated with impaired endothelial progenitor cell function and heightened adipose inflammation in individuals with type 2 diabetes mellitus, pre‐diabetic states, and obesity."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "16", "end_ref": "24"}]}, {"type": "t", "text": " Moreover, diminished miR‐126 is detected in acute myocardial infarction and is linked to adverse post‐ischemic cardiac remodeling."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "25"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nmiR‐126 is also efficiently packaged into extracellular vesicles—including endothelial microparticles and exosomes—thereby mediating critical paracrine signaling in tissue repair and tumor microenvironment modulation. Circulating pro‐angiogenic cell subsets express and secrete high levels of miR‐126, which help potentiate angiogenesis, while platelet‐derived microparticles transfer functional miR‐126 to macrophages to reprogram them toward an enhanced phagocytic, anti‐inflammatory phenotype."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "27", "end_ref": "32"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its well‐established roles in the vasculature and in modulating tumor cell behavior, miR‐126 contributes to the regulation of hematopoietic stem cell quiescence and influences chemoresistance in acute myeloid leukemia, while its tissue‐restricted expression is exemplified by the inherently low levels in prostate epithelial cells due to silencing of its host gene—a contrast that may contribute to pro‐migratory phenotypes in these cells."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "33"}, {"type": "fg_f", "ref": "14"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Tamia A Harris, Munekazu Yamakuchi, Marcella Ferlito, et al. 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Synonyms MIRN126, MIR-126, MIRNA126
NCBI Gene ID 406913
API
Download Associations
Predicted Functions View MIR126's ARCHS4 Predicted Functions.
Co-expressed Genes View MIR126's ARCHS4 Predicted Functions.
Expression in Tissues and Cell Lines View MIR126's ARCHS4 Predicted Functions.

Functional Associations

MIR126 has 1,337 functional associations with biological entities spanning 6 categories (molecular profile, chemical, disease, phenotype or trait, functional term, phrase or reference, cell line, cell type or tissue, gene, protein or microRNA) extracted from 18 datasets.

Click the + buttons to view associations for MIR126 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 MIR126 gene relative to other cell lines from the CCLE Cell Line Gene CNV Profiles dataset.
COSMIC Cell Line Gene CNV Profiles cell lines with high or low copy number of MIR126 gene relative to other cell lines from the COSMIC Cell Line Gene CNV Profiles dataset.
CTD Gene-Chemical Interactions chemicals interacting with MIR126 gene/protein from the curated CTD Gene-Chemical Interactions dataset.
CTD Gene-Disease Associations diseases associated with MIR126 gene/protein from the curated CTD Gene-Disease Associations dataset.
ENCODE Histone Modification Site Profiles histone modification site profiles with high histone modification abundance at MIR126 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 MIR126 gene from the ENCODE Transcription Factor Binding Site Profiles dataset.
ENCODE Transcription Factor Targets transcription factors binding the promoter of MIR126 gene in ChIP-seq datasets from the ENCODE Transcription Factor Targets dataset.
GeneRIF Biological Term Annotations biological terms co-occuring with MIR126 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 MIR126 from the GeneSigDB Published Gene Signatures dataset.
GEO Signatures of Differentially Expressed Genes for Gene Perturbations gene perturbations changing expression of MIR126 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 MIR126 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 MIR126 gene relative to other tissues from the GTEx Tissue Gene Expression Profiles dataset.
HuGE Navigator Gene-Phenotype Associations phenotypes associated with MIR126 gene by text-mining GWAS publications from the HuGE Navigator Gene-Phenotype Associations dataset.
JASPAR Predicted Transcription Factor Targets transcription factors regulating expression of MIR126 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 MIR126 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 MIR126 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 MIR126 gene from the Roadmap Epigenomics Histone Modification Site Profiles dataset.
WikiPathways Pathways 2014 pathways involving MIR126 protein from the Wikipathways Pathways 2014 dataset.