Circulating miRNA Expression Is Inversely Correlated with Tumor Tissue or Sentinel Lymph Nodes in Estrogen Receptor-Positive Early Breast Cancer Patients
Escuin i Borràs, Daniel (Institut d'Investigació Biomèdica Sant Pau)
López Vilaró, Laura (Institut d'Investigació Biomèdica Sant Pau)
Bell, Olga (Institut d'Investigació Biomèdica Sant Pau)
Mora, Josefina (Hospital de la Santa Creu i Sant Pau (Barcelona, Catalunya))
García-Valdecasas Vilanova, Bárbara (Institut d'Investigació Biomèdica Sant Pau)
Moral Duarte, Antonio (Institut d'Investigació Biomèdica Sant Pau)
Clos Enríquez, Montserrat (Institut d'Investigació Biomèdica Sant Pau)
Boronat, Laia (Institut d'Investigació Biomèdica Sant Pau)
Arqueros, Cristina (Institut d'Investigació Biomèdica Sant Pau)
Barnadas i Molins, Agustí (Institut d'Investigació Biomèdica Sant Pau)
Universitat Autònoma de Barcelona

Date:	2023
Abstract:	The deregulation of microRNAs (miRNAs) is associated with the various steps of the metastatic process. In addition, circulating miRNAs are remarkably stable in peripheral blood, making them ideal noninvasive biomarkers for disease diagnosis. Here, we performed a proof-of-principle study to determine whether tumor-tissue-derived miRNAs are traceable to plasma in ER-positive early breast cancer patients. We performed RNA-sequencing on 30 patients for whom plasma, sentinel lymph nodes (SLNs) and tumor tissue were available. We carried out differential expression, gene ontology and enrichment analyses. Our results show that circulating miRNAs are inversely expressed compared with tumor tissue or SLNs obtained from the same patients. Our differential expression analysis shows the overall downregulation of circulating miRNAs. However, the expression of miR-643a-3p and miR-223 was up-regulated in patients with positive SLNs. Furthermore, gene ontology analysis showed the significant enrichment of biological processes associated with the regulation of epithelial cell proliferation and transcriptional regulation commonly involved in the promotion of metastases. Our results suggest the potential role of several circulating miRNAs as surrogate markers of lymph node metastases in early breast cancer patients. Further preclinical and clinical studies are required to understand the biological significance of the most significant miRNAs and to validate our results in a larger cohort of patients.
Grants:	Ministerio de Economía y Competitividad PI13/00110 Instituto de Salud Carlos III PI19/00362 Ministerio de Economía y Competitividad CB16/12/00471
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Biomarkers ; Early breast cancer ; Metastasis ; Mirnas ; Sentinel lymph node
Published in:	International journal of molecular sciences, Vol. 24 (august 2023) , ISSN 1422-0067

DOI: 10.3390/ijms241713293
PMID: 37686099

14 p, 6.8 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Institut de Recerca Sant Pau
Articles > Research articles
Articles > Published articles