info:eu-repo/semantics/article
Potential therapeutic targets for growth arrest of colorectal cancer cells exposed to PTHrP
Fecha
2018-12-15Registro en:
Martín, María Julia; Gigola, Graciela; Zwenger, Ariel; Carriquiriborde, Martin; Gentil, Florencia; et al.; Potential therapeutic targets for growth arrest of colorectal cancer cells exposed to PTHrP; Elsevier Ireland; Molecular and Cellular Endocrinology; 478; 15-12-2018; 32-44
0303-7207
CONICET Digital
CONICET
Autor
Martín, María Julia
Gigola, Graciela
Zwenger, Ariel
Carriquiriborde, Martin
Gentil, Florencia
Gentili, Claudia Rosana
Resumen
Although PTHrP is implicated in several cancers, its role in chemoresistance is not fully elucidated. We found that in CRC cells, PTHrP exerts proliferative and protective effects and induces cell migration. The aim of this work was to further study the effects of PTHrP in CRC cells. Herein we evidenced, for the first time, that PTHrP induces resistance to CPT-11 in Caco-2 and HCT116 cells; although both cell lines responded to the drug through different molecular mechanisms, the chemoresistance by PTHrP in these models is mediated through ERK, which in turn is activated by PCK, Src and Akt. Moreover, continue administration of PTHrP in nude mice xenografts increased the protein levels of this MAPK and of other markers related to tumorigenic events. The understanding of the molecular mechanisms leading to ERK 1/2 activation and the study of ERK targets may facilitate the development of new therapeutic strategies for CRC treatment.