RT Journal Article
SR Electronic
T1 <em>BRAF</em> and <em>NRAS</em> mutations in melanoma: potential relationships to clinical response to HSP90 inhibitors
JF Molecular Cancer Therapeutics
JO Mol Cancer Ther
FD American Association for Cancer Research
SP 737
OP 739
DO 10.1158/1535-7163.MCT-08-0145
VO 7
IS 4
A1 Banerji, Udai
A1 Affolter, Annette
A1 Judson, Ian
A1 Marais, Richard
A1 Workman, Paul
YR 2008
UL http://mct.aacrjournals.org/content/7/4/737.abstract
AB Oncogenic BRAF and NRAS mutations are frequent in malignant melanoma. BRAF that is activated by the common V600E and other mutations, as well as by upstream NRAS mutations, has been shown to require the molecular chaperone heat shock protein 90 (HSP90) for stabilization and is depleted by the HSP90 inhibitor 17-allylamino-17-demethoxygeldanamycin (17-AAG)]. Here, we explore the possible relationship between tumor BRAF and NRAS mutations and clinical response to 17-AAG in six patients with metastatic malignant melanoma who received pharmacologically active doses of 17-AAG as part of a phase I clinical trial. One patient with disease stabilization for 49 months had a G13DNRAS mutation and WTBRAF. A second patient who had stable disease for 15 months had a V600EBRAF mutation and WTNRAS. These preliminary results suggest that BRAF and NRAS mutation status should be determined in prospective phase II studies of HSP90 inhibitors in melanoma. [Mol Cancer Ther 2008;7(4):737–9]