Activation of the integrated stress response confers vulnerability to mitoribosome-targeting antibiotics in melanoma

0555718 - ÚMG 2022 RIV US eng J - Journal Article
Vendramin, R. - Katopodi, V. - Cinque, S. - Konnova, A. - Knezevic, Z. - Adnane, S. - Verheyden, Y. - Karras, P. - Demesmaeker, E. - Bosisio, F. - Kučera, Lukáš - Rozman, Jan - Gladwyn-Ng, I. - Rizzotto, L. - Dassi, E. - Millevoi, S. - Bechter, O. - Marine, J. - Leucci, E.
Activation of the integrated stress response confers vulnerability to mitoribosome-targeting antibiotics in melanoma.
Journal of Experimental Medicine. Roč. 218, č. 9 (2021), č. článku e20210571. ISSN 0022-1007. E-ISSN 1540-9538
R&D Projects: GA MŠMT(CZ) LM2018126; GA MŠMT EF16_013/0001789
Research Infrastructure: CCP II - 90126
Institutional support: RVO:68378050
Keywords : mitochondrial translation * drug-tolerant * cancer * resistance * metabolism * atf4 * dysfunction * doxycycline * transition * microbiome
OECD category: Biochemistry and molecular biology
Impact factor: 17.579, year: 2021
Method of publishing: Open access
https://rupress.org/jem/article/218/9/e20210571/212494/Activation-of-the-integrated-stress-response

The ability to adapt to environmental stress, including therapeutic insult, contributes to tumor evolution and drug resistance. In suboptimal conditions, the integrated stress response (ISR) promotes survival by dampening cytosolic translation. We show that ISR-dependent survival also relies on a concomitant up-regulation of mitochondrial protein synthesis, a vulnerability that can be exploited using mitoribosome-targeting antibiotics. Accordingly, such agents sensitized to MAPK inhibition, thus preventing the development of resistance in BRAFV600E melanoma models. Additionally, this treatment compromised the growth of melanomas that exhibited elevated ISR activity and resistance to both immunotherapy and targeted therapy. In keeping with this, pharmacological inactivation of ISR, or silencing of ATF4, rescued the antitumoral response to the tetracyclines. Moreover, a melanoma patient exposed to doxycycline experienced complete and long-lasting response of a treatment-resistant lesion. Our study indicates that the repurposing of mitoribosome-targeting antibiotics offers a rational salvage strategy for targeted therapy in BRAF mutant melanoma and a therapeutic option for NRAS-driven and immunotherapy-resistant tumors.
Permanent Link: http://hdl.handle.net/11104/0330193