Autophagy orchestrates adaptive responses to targeted therapy in endometrial cancer

Eritja, N., Chen, B. J., Rodríguez-Barrueco, R., Santacana, M., Gatius, S., Vidal, A., Martí, M. D., Ponce, J., Bergadà, L., Yeramian, A., Encinas, M., Ribera, J., Reventós, J., Boyd, J., Villanueva, A., Matias-Guiu, X., Dolcet, X., Llobet-Navàs, D. (2017) Autophagy orchestrates adaptive responses to targeted therapy in endometrial cancer. Autophagy, 13 (3). pp. 608-624. ISSN 15548627 (ISSN) (Public Dataset)

DOI: 10.1080/15548627.2016.1271512


Targeted therapies in endometrial cancer (EC) using kinase inhibitors rarely result in complete tumor remission and are frequently challenged by the appearance of refractory cell clones, eventually resulting in disease relapse. Dissecting adaptive mechanisms is of vital importance to circumvent clinical drug resistance and improve the efficacy of targeted agents in EC. Sorafenib is an FDA-approved multitarget tyrosine and serine/threonine kinase inhibitor currently used to treat hepatocellular carcinoma, advanced renal carcinoma and radioactive iodine-resistant thyroid carcinoma. Unfortunately, sorafenib showed very modest effects in a multi-institutional phase II trial in advanced uterine carcinoma patients. Here, by leveraging RNA-sequencing data from the Cancer Cell Line Encyclopedia and cell survival studies from compound-based high-throughput screenings we have identified the lysosomal pathway as a potential compartment involved in the resistance to sorafenib. By performing additional functional biology studies we have demonstrated that this resistance could be related to macroautophagy/autophagy. Specifically, our results indicate that sorafenib triggers a mechanistic MAPK/JNK-dependent early protective autophagic response in EC cells, providing an adaptive response to therapeutic stress. By generating in vivo subcutaneous EC cell line tumors, lung metastatic assays and primary EC orthoxenografts experiments, we demonstrate that targeting autophagy enhances sorafenib cytotoxicity and suppresses tumor growth and pulmonary metastasis progression. In conclusion, sorafenib induces the activation of a protective autophagic response in EC cells. These results provide insights into the unopposed resistance of advanced EC to sorafenib and highlight a new strategy for therapeutic intervention in recurrent EC.

Item Type: Paper
Subjects: diseases & disorders > cancer
CSHL Authors:
Communities: CSHL labs > Boyd lab
Depositing User: Adrian Gomez
Date: 2017
Date Deposited: 13 Mar 2020 19:23
Last Modified: 13 Mar 2020 19:23
PMCID: PMC5361596
Related URLs:
Dataset ID:

Actions (login required)

Administrator's edit/view item Administrator's edit/view item
CSHL HomeAbout CSHLResearchEducationNews & FeaturesCampus & Public EventsCareersGiving