2025 Fall
International Convention of PSK

D+7
October 22-24, 2025

Abstracts

P6-9

Development of pan-Raf inhibitor for the treatment of melanoma via fragment-based drug discovery

  • Eunah Cho2, Sanghwa Lee1, Gyoonhee Han*1,2
  • 1Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Republic of Korea
  • 2Graduate Program of Industrial Pharmaceutical Science, College of Pharmacy, Yonsei University, Republic of Korea

The Raf kinase family regulates the RAS-ERK signaling cascade, and oncogenic mutations in BRAF, particularly BRAF V600E, are major drivers in cutaneous melanoma. First-generation B-Raf inhibitors such as vemurafenib and dabrafenib initially showed clinical efficacy but induced resistance through Raf dimerization, leading to paradoxical pathway activation. To overcome this, pan-Raf inhibitors have been developed, with tovorafenib recently approved as a type II inhibitor targeting both monomers and dimers. In this study, a fragment-based drug discovery approach was applied: docking studies guided the design of tovorafenib-derived fragments and analogs, which were synthesized and evaluated for biological activity. The results indicate potential applications of fragment-based strategies in developing next-generation pan-Raf inhibitors.  


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