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Title

The orphan receptor GPR55 drives skin carcinogenesis and is upregulated in human squamous cell carcinomas

AuthorsPérez-Gómez, Eduardo ; Andradas, Clara; Flores, Juana María; Quintanilla, Miguel ; Paramio, Jesús M.; Sánchez, Cristina
Issue Date2013
PublisherNature Publishing Group
CitationOncogene 32(20): 2534-2542 (2013)
AbstractG protein-coupled receptors (GPCRs) control crucial physiological processes and their dysfunction contributes to various human diseases, including cancer. The orphan GPCR GPR55 was identified and cloned more than a decade ago, but very little is known about its physio-pathological relevance. It has been recently shown that GPR55 controls the behavior of human cancer cell lines in culture and xenografts. However, the assessment of the actual role of this receptor in malignant transformation in vivo is hampered by the lack of studies on its functional impact in clinically-relevant models of cancer. Here we demonstrate that GPR55 drives mouse skin tumor development. Thus, GPR55-deficient mice were more resistant to DMBA/TPA-induced papilloma and carcinoma formation than their wild-type littermates. GPR55 exerted this pro-tumor effect primarily by conferring a proliferative advantage on cancer cells. In addition, GPR55 enhanced skin cancer cell anchorage-independent growth, invasiveness and tumorigenicity in vivo, suggesting that it promotes not only tumor development but also tumor aggressiveness. Finally, we observed that GPR55 is upregulated in human skin tumors and other human squamous cell carcinomas compared with the corresponding healthy tissues. Altogether, these findings reveal the pivotal importance of GPR55 in skin tumor development, and suggest that this receptor may be used as a new biomarker and therapeutic target in squamous cell carcinomas.
URIhttp://hdl.handle.net/10261/124158
DOI10.1038/onc.2012.278
Identifiersdoi: 10.1038/onc.2012.278
issn: 0950-9232
e-issn: 1476-5594
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