Exosomal miRNA profile as complementary tool in the diagnostic and prediction of treatment response in localized breast cancer under neoadjuvant ... View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Alba Rodríguez-Martínez, Diego de Miguel-Pérez, Francisco Gabriel Ortega, José Luis García-Puche, Inmaculada Robles-Fernández, José Exposito, Jordi Martorell-Marugan, Pedro Carmona-Sáez, María del Carmen Garrido-Navas, Christian Rolfo, Hugh Ilyine, José Antonio Lorente, Marta Legueren, María José Serrano

ABSTRACT

BACKGROUND: Breast cancer patients under neoadjuvant chemotherapy includes a heterogeneous group of patients who eventually develop distal disease, not detectable by current methods. We propose the use of exosomal miRNAs and circulating tumor cells as diagnostic and predictive biomarkers in these patients. METHODS: Fifty-three breast cancer women initially diagnosed with localized breast cancer under neoadjuvant chemotherapy were prospectively enrolled in this study. However, six of them were later re-evaluated and diagnosed as metastatic breast cancer patients by PET-CT scan. Additionally, eight healthy donors were included. Circulating tumor cells and serum exosomal miRNAs were isolated from blood samples before and at the middle of neoadjuvant therapy and exosomal miRNA levels analyzed by qPCR. RESULTS: Before neoadjuvant therapy, exosomal miRNA-21 and 105 expression levels were higher in metastatic versus non-metastatic patients and healthy donors. Likewise, higher levels of miRNA-222 were observed in basal-like (p = 0.037) and in luminal B versus luminal A (p = 0.0145) tumor subtypes. Exosomal miRNA-222 levels correlated with clinical and pathological variables such as progesterone receptor status (p = 0.017) and Ki67 (p = 0.05). During neoadjuvant treatment, exosomal miRNA-21 expression levels directly correlated with tumor size (p = 0.039) and inversely with Ki67 expression (p = 0.031). Finally, higher levels of exosomal miRNA-21, miRNA-222, and miRNA-155 were significantly associated with the presence of circulating tumor cells. CONCLUSION: Liquid biopsies based on exosomal miRNAs and circulating tumor cells can be a complementary clinical tool for improving breast cancer diagnosis and prognosis. More... »

PAGES

21

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s13058-019-1109-0

DOI

http://dx.doi.org/10.1186/s13058-019-1109-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1111954595

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30728048


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RDF/XML is a standard XML format for linked data.

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