Basic Information
Regular Relationship :
Phenotype/DiseaseSpecieBreast Cancer
CeRNA1hsa_circ_0044234[Circular RNA]
miRNAmiR-135b-5p[miRNA]
CeRNA2GATA3[mRNA]
Tissue/Cell linebreast cancer cells
SpecieHomo sapiens (human)
CitationCancer Cell Int. 2021 Jun 14;21(1):312. doi: 10.1186/s12935-021-02015-6.
Reference title
Circular RNA hsa_circ_0044234 as distinct molecular signature of triple negative breast cancer: a potential regulator of GATA3.
Experimental verification
microarray;qPCR;RT-qPCR;
Functional description
BACKGROUND: Circular RNAs (circRNAs) have been implicated in the initiation and development of breast cancer as functional non-coding RNAs (ncRNA). The roles of circRNAs as the competing endogenous RNAs (ceRNAs) to sponge microRNAs (miRNAs) have also been indicated. However, the functions of circRNAs in breast cancer have not been totally elucidated. This study aimed to explore the clinical implications and possible roles of circ_0044234 in carcinogenesis of the most problematic BC subtype, triple negative breast cancer (TNBC), which are in desperate need of biomarkers and targeted therapies. METHODS: The importance of circ_0044234 as one of the most dysregulated circRNAs in TNBC was discovered through microarray expression profile analysis. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was performed to confirm the downregulation of circ_0044234 in triple negative tumors and cell lines versus non-triple negative ones. The bioinformatics prediction revealed that circ_0044234 could act as an upstream sponge in the miR-135b/GATA3 axis, two of the most dysregulated transcripts in TNBC. RESULTS: Our experimental investigation of circ_0044234 expressions in various BC subtypes as well as cell lines reveals that TNBC expresses circ_0044234 at a substantially lower level than non-TNBC. The ROC curve analysis indicates that it could be applied as a discriminative biomarker to identify TNBC from other BC subtypes. Moreover, circ_0044234 expression could be an independent prognostic biomarker in BC. Interestingly, a substantial inverse expression correlation was detected between circ_0044234 and miR-135b-5p as well as between miR-135b-5p and GATA3 in breast tumors. CONCLUSIONS: The possible clinical usefulness of circ_0044234 as a promising distinct biomarker and upcoming therapeutic target for TNBC have been indicated in this research. Our comprehensive approach revealed the potential circ_0044234/miR135b-5p/GATA3 ceRNA axis in TNBC.
Annotations
External Annotation for hsa_circ_0044234 |
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LncRNA-associated competing triplets and functions. |
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Comprehensive experimentally supported associations between lncRNA and human cancer. |
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Infer genomic variations that disturb lncRNA-associated ceRNA regulation.. |
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Provide and annotate disease or phenotype-associated variants in human long non-coding RNAs (lncRNAs) and circular RNAs (circRNAs) or their regulatory elements. |
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Providing cellular-specific lncRNA-associated ceRNA networks predicted via high-throughput analysis of single-cell genomic data. |
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Information on all annotated and predicted human genes. |
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Gene nomenclature, gene families and associated resources (genomic, proteomic, phenotypic information). |
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Genome browser for vertebrate genomes. |
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An annotated collection of all publicly available DNA sequences. |
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A wiki-based platform for community curation of human long non-coding RNAs. |
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An integrated knowledge database dedicated to non-coding RNAs. |
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An integrated database of human annotated lncRNA transcripts. |
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Comprehensive annotations of eukaryotic long non-coding RNAs. |
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Comprehensive experimentally supported associations between lncRNA and human cancer. |
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A comprehensive, authoritative compendium of human genes and genetic phenotypes. |
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The catalogue of somatic mutations in cancer. |
