PLX4032, a potent inhibitor of the B‐Raf V600E oncogene, selectively inhibits V600E‐positive melanomas

JT Lee, L Li, PA Brafford… - Pigment cell & …, 2010 - Wiley Online Library
JT Lee, L Li, PA Brafford, M Van Den Eijnden, MB Halloran, K Sproesser, NK Haass
Pigment cell & melanoma research, 2010Wiley Online Library
Targeted intervention of the B‐Raf V600E gene product that is prominent in melanoma has
been met with modest success. Here, we characterize the pharmacological properties of
PLX4032, a next‐generation inhibitor with exquisite specificity against the V600E oncogene
and striking anti‐melanoma activity. PLX4032 induces potent cell cycle arrest, inhibits
proliferation, and initiates apoptosis exclusively in V600E‐positive cells in a variety of in vitro
experimental systems; follow‐up xenograft studies demonstrate extreme selectivity and …
Summary
Targeted intervention of the B‐Raf V600E gene product that is prominent in melanoma has been met with modest success. Here, we characterize the pharmacological properties of PLX4032, a next‐generation inhibitor with exquisite specificity against the V600E oncogene and striking anti‐melanoma activity. PLX4032 induces potent cell cycle arrest, inhibits proliferation, and initiates apoptosis exclusively in V600E‐positive cells in a variety of in vitro experimental systems; follow‐up xenograft studies demonstrate extreme selectivity and efficacy against melanoma tumors bearing the V600E oncoproduct. The collective data support further exploration of PLX4032 as a candidate drug for patients with metastatic melanoma; accordingly, validation of PLX4032 as a therapeutic tool for patients with melanoma is now underway in advanced human (Phase III) clinical trials.
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