A Single Variant in Pri-miRNA-155 Associated with Susceptibility to Hereditary Breast Cancer Promotes Aggressiveness in Breast Cancer Cells

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dc.contributor.authorLanderos, Natalia
dc.contributor.authorGonzalez-Hormazabal, Patricio
dc.contributor.authorPerez-Moreno, Pablo
dc.contributor.authorTapia, Julio C.
dc.contributor.authorJara, Lilian
dc.date.accessioned2025-01-20T21:01:12Z
dc.date.available2025-01-20T21:01:12Z
dc.date.issued2022
dc.description.abstractVariants in genes encoding for microRNAs have been associated with their deregulation in breast cancer (BC). Sequencing of microRNAs deregulated in BC was performed using DNA from Chilean patients with a strong family history and negative for mutations in BRCA1/BRCA2. Seventeen variants were identified, three of which were selected for a case-control association study: rs376491654 (miR-335), rs755634302 (miR-497), and rs190708267 (miR-155). For rs190708267 C>T, the heterozygous T allele was detected in four BC cases and absent in controls, while homozygous TT cases were not detected. Variants were modelled in silico, cloned in a plasmid, expressed in BC cell lines, and functional in vitro assays were performed. Overexpression of the miR-155-T allele increased mature miR-155-5p levels in both BC cell lines, suggesting that its presence alters pre-miR-155 processing. Moreover, BC cells overexpressing the miR-155-T allele showed increased proliferation, migration, and resistance to cisplatin-induced death compared to miR-155-C overexpressing cells. Of note, the 3 ' UTR of APC, GSK3 beta, and PPP1CA genes, all into the canonical Wnt signaling pathway, were identified as direct targets. APC and GSK3 beta mRNA levels decreased while PP1 levels increased. These results suggest a pathogenic role of the variant rs190708267 (miR-155) in BRCA 1/2 negative BC, conferring susceptibility and promoting traits of aggressiveness.
dc.fuente.origenWOS
dc.identifier.doi10.3390/ijms232315418
dc.identifier.eissn1422-0067
dc.identifier.issn1661-6596
dc.identifier.urihttps://doi.org/10.3390/ijms232315418
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92832
dc.identifier.wosidWOS:000896162300001
dc.issue.numero23
dc.language.isoen
dc.revistaInternational journal of molecular sciences
dc.rightsacceso restringido
dc.subjectmicroRNA
dc.subjectbreast cancer
dc.subjectSNV
dc.subjectcanonical Wnt pathway
dc.subjectaggressiveness
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleA Single Variant in Pri-miRNA-155 Associated with Susceptibility to Hereditary Breast Cancer Promotes Aggressiveness in Breast Cancer Cells
dc.typeartículo
dc.volumen23
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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