New Insights in the Interaction of FGF/FGFR and Steroid Receptor Signaling in Breast Cancer
Cecilia Pérez Piñero1, Sebastián Giulianelli1,2, Caroline A Lamb1
1Instituto de Biología y Medicina Experimental, IBYME CONICET, C1428ADN Ciudad de Buenos Aires, Argentina.
Abstract:
Luminal breast cancer (BrCa) has a favorable prognosis compared with other tumor subtypes. However, with time, tumors may evolve and lead to disease progression; thus, there is a great interest in unraveling the mechanisms that drive tumor metastasis and endocrine resistance. In this review, we focus on one of the many pathways that have been involved in tumor progression, the fibroblast growth factor/fibroblast growth factor receptor (FGFR) axis. We emphasize in data obtained from in vivo experimental models that we believe that in luminal BrCa, tumor growth relies in a crosstalk with the stromal tissue. We revisited the studies that illustrate the interaction between hormone receptors and FGFR. We also highlight the most frequent alterations found in BrCa cell lines and provide a short review on the trials that use FGFR inhibitors in combination with endocrine therapies. Analysis of these data suggests there are many players involved in this pathway that might be also targeted to decrease FGF signaling, in addition to specific FGFR inhibitors that may be exploited to increase their efficacy.
Related Concept Videos
TGF - β Signaling Pathway
Mitogens and the Cell Cycle
Transducer Mechanism: Nuclear Receptors
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Signal Transduction: Overview
Typically, signal transduction involves three...
Transducer Mechanism: G Protein–Coupled Receptors
GPCRs are also called heptahelical,...
Target Cell Response to Hormones
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...


