| HGNC Family | Non-coding RNAs |
| Name | microRNA 326 |
| 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-326 has emerged as a key regulator of immune function and fibrosis. In autoimmune conditions such as multiple sclerosis, miR-326 promotes the differentiation of Th17 cells by directly targeting negative regulators like Ets‑1, with its expression closely correlating with disease severity. In addition, alterations in miR-326 levels have been implicated in other immune‐mediated states, including type 1 diabetes, as well as in fibrotic processes in pulmonary and endometrial tissues via modulation of TGF‑β1/Smad3 signaling."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "5"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn the context of cancer, miR-326 predominantly functions as a tumor suppressor and prognostic biomarker across a broad spectrum of malignancies. In gliomas, for instance, overexpression of miR-326 triggers apoptosis, cell cycle arrest, and reduced metabolic activity by targeting oncogenes and components of the Notch and Hedgehog pathways. Similar anti‐tumor effects have been documented in non‑small cell lung cancer, colorectal cancer, pancreatic ductal adenocarcinoma, endometrial, and gastric cancers, where miR-326 suppresses proliferation, migration, and invasion by downregulating key factors such as CCND1, NOB1, FSCN1, and NSBP1. Moreover, its diminished expression has been linked to aggressive disease phenotypes and poorer clinical outcomes in osteosarcoma and other tumors."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "6", "end_ref": "17"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nBeyond its direct tumor‐suppressive activities, miR-326 modulates chemoresistance and intricate intracellular signaling through competitive endogenous RNA (ceRNA) networks. Downregulation of miR-326 is associated with multidrug resistance by influencing drug efflux transporters such as MRP1 and through interactions with ABCB1 transcripts. In several cancers, long noncoding RNAs and circular RNAs—including SNHG1, HOTAIR, PCAT1, and specific circRNAs—act as molecular sponges to sequester miR-326, thereby derepressing targets involved in proliferation, invasion, and survival (for example, SP1, FUT6, CCL5, and components of the Wnt/β‑catenin pathway). Such ceRNA interactions have been documented not only in solid tumors like esophageal and rectal cancers but also in leukemia, where reduced miR-326 correlates with chemoresistance. Additionally, emerging roles in other contexts, such as regulation of proteases (e.g., ADAM17) in lung adenocarcinoma, modulation of Hedgehog signaling in medulloblastoma, and control of apoptosis in platelets via Bcl‑xL targeting, further underscore the multifaceted biological functions of this microRNA."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "18", "end_ref": "26"}, {"type": "fg_f", "ref": "19"}, {"type": "fg_f", "ref": "21"}, {"type": "fg_fs", "start_ref": "27", "end_ref": "39"}, {"type": "fg_f", "ref": "13"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Changsheng Du, Chang Liu, Jiuhong Kang, et al. 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| Synonyms | MIRN326, HSA-MIR-326, MIR-326 |
| NCBI Gene ID | 442900 |
| 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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MIR326 has 558 functional associations with biological entities spanning 6 categories (molecular profile, functional term, phrase or reference, chemical, disease, phenotype or trait, cell line, cell type or tissue, gene, protein or microRNA) extracted from 17 datasets.
Click the + buttons to view associations for MIR326 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 MIR326 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 MIR326 gene from the CHEA Transcription Factor Binding Site Profiles dataset. | |
| ChEA Transcription Factor Targets | transcription factors binding the promoter of MIR326 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 MIR326 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 MIR326 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 MIR326 gene from the ENCODE Transcription Factor Binding Site Profiles dataset. | |
| ENCODE Transcription Factor Targets | transcription factors binding the promoter of MIR326 gene in ChIP-seq datasets from the ENCODE Transcription Factor Targets dataset. | |
| GeneRIF Biological Term Annotations | biological terms co-occuring with MIR326 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 MIR326 from the GeneSigDB Published Gene Signatures dataset. | |
| GEO Signatures of Differentially Expressed Genes for Gene Perturbations | gene perturbations changing expression of MIR326 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 MIR326 gene from the GEO Signatures of Differentially Expressed Genes for Small Molecules dataset. | |
| HuGE Navigator Gene-Phenotype Associations | phenotypes associated with MIR326 gene by text-mining GWAS publications from the HuGE Navigator Gene-Phenotype Associations dataset. | |
| JASPAR Predicted Transcription Factor Targets | transcription factors regulating expression of MIR326 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 MIR326 gene relative to other cell lines from the Klijn et al., Nat. Biotechnol., 2015 Cell Line Gene CNV Profiles dataset. | |
| KnockTF Gene Expression Profiles with Transcription Factor Perturbations | transcription factor perturbations changing expression of MIR326 gene from the KnockTF Gene Expression Profiles with Transcription Factor Perturbations dataset. | |
| MotifMap Predicted Transcription Factor Targets | transcription factors regulating expression of MIR326 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 MIR326 gene from the Roadmap Epigenomics Histone Modification Site Profiles dataset. | |