Costa Nogueira, ClotildeMuinelo Romay, LauraLópez López, RafaelPereira Veiga, Tais2019-08-012019-08-012019http://hdl.handle.net/10347/19470Metastatic disease is the leading cause of cancer associated deaths. Circulating tumour cells (CTCs) are responsible for tumoral dissemination, as they are able to be released from the primary tumour and establish distal metastatic foci. The objective of this doctoral thesis is to increase the knowledge of CTCs, through the use of liquid biopsy. To this aim, with the use of blood samples from metastatic cancer patients we identified key biomarkers for cancer progression. In this context, different experimental approaches were considered: the validation of new technologies for the study of CTCs, the isolation and molecular analysis of CTCs and the establishment of in vivo models.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Circulating tumor cellLiquid biopsyBreast cancerXenograftMaterias::Investigación::32 Ciencias médicas::3201 Ciencias clínicas::320101 OncologíaMaterias::Investigación::32 Ciencias médicas::3208 Farmacodinámica::320899 biopsia líquidadoctoral thesisopen access