ROCK1 is a potential combinatorial drug target for BRAF mutant melanoma

AuthorCount:10;
Treatment of BRAF mutant melanomas with specific BRAF inhibitors leads to tumor remission. However, most patients eventually relapse due to drug resistance. Therefore, we designed an integrated strategy using (phospho)proteomic and functional genomic platforms to identify drug targets whose inhibition sensitizes melanoma cells to BRAF inhibition. We found many proteins to be induced upon PLX4720 (BRAF inhibitor) treatment that are known to be involved in BRAF inhibitor resistance, including FOXD3 and ErbB3. Several proteins were down-regulated, including Rnd3, a negative regulator of ROCK1 kinase. For our genomic approach, we performed two parallel shRNA screens using a kinome library to identify genes whose inhibition sensitizes to BRAF or ERK inhibitor treatment. By integrating our functional genomic and (phospho)proteomic data, we identified ROCK1 as a potential drug target for BRAF mutant melanoma. ROCK1 silencing increased melanoma cell elimination when combined with BRAF or ERK inhibitor treatment. Translating this to a preclinical setting, a ROCK inhibitor showed augmented melanoma cell death upon BRAF or ERK inhibition in vitro. These data merit exploration of ROCK1 as a target in combination with current BRAF mutant melanoma therapies.

Maddalo, GianlucaStockholms universitet,Institutionen för biokemi och biofysik,University of Utrecht, Netherlands; Netherlands Proteomics Centre, Netherlands(Swepub:su)gmadd (author)
Greig, Kylie (author)
Raaijmakers, Linsey M. (author)
Possik, Patricia A. (author)
van Breukelen, Bas (author)
Cappadona, Salvatore (author)
Heck, Albert J. R. (author)
Altelaar, A. F. Maarten (author)
Peeper, Daniel S. (author)
Stockholms universitetInstitutionen för biokemi och biofysik (creator_code:org_t)

By the author/editor: Smit, Marjon A.; Maddalo, Gianluc ...; Greig, Kylie; Raaijmakers, Lin ...; Possik, Patricia ...; van Breukelen, B ...; show more...; Cappadona, Salva ...; Heck, Albert J. ...; Altelaar, A. F. ...; Peeper, Daniel S ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Biochemistry and ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.