PLX4032 Property

Density 

1.46

storage temp. 

-20°C

solubility 

Soluble in DMSO (up to 100 mg/ml)

form 

White powder.

pka

6.26±0.10(Predicted)

color 

White or off-white

Stability:

Stable for 1 year from date of purchase as supplied. Solutions in DMSO may be stored at -20°C for up to 3 months.

CAS DataBase Reference

918504-65-1

Safety

HS Code 

29339900

Hazardous Substances Data

918504-65-1(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

PLX4032 Chemical Properties,Usage,Production

Description

In August 2011, the United States FDA approved vemurafenib (PLX- 4032, RO-5185426) for the treatment of patients with metastatic melanoma with the BRAFV600E mutation. Vemurafenib has been developed as a targeted therapy for patients with the BRAF gene mutation since oncogenic B-raf signaling is implicated in approximately 50% of melanomas. Vemurafenib was identified based on an initial high-throughput screen followed by the extensive use of structure-based drug design. Vemurafenib is a potent inhibitor of B-RafV600E kinase (IC₅₀=13 nM) compared to its potency against wildtype B-raf (IC₅₀=160 nM) and is fairly selective versus a panel of 200 kinases. It does inhibit other kinases (RAF1, SRMS, ACK1, MAP4K5, and FGR) and mutant B-raf kinases (BRAFV600K, BRAFV600D, and BRAFV600R) with enzyme IC_50's of <100 nM.

Chemical Properties

Off-White Solid

Originator

Plexxikon (United States)

Uses

Vemurafenib selective BRAFV600E kinase inhibitor; an antitumor agent. Vemurafenib functions by inhibiting the proliferation and mitogen-activated protein/extracellular signal-regulated kinase (ERK) kinase and ERK phosphorylation in a panel of tumor cell lines, including melanoma cell lines expressing BRAFV600E or other mutant BRAF proteins altered at codon 600.

Uses

Vemurafenib (PLX4032, RG7204) is a novel and potent inhibitor of B-RafV600E with IC50 of 31 nM

Uses

PLX4032 is an orally bioavailable, ATP-competitive inhibitor of mutant V600E and wild type B-Raf kinases (IC50s = 31 and 100 nM, respectively). It inhibits cell proliferation in a variety of cell lines expressing B-Raf V600E and synergizes strongly with taxol, vinblastine, and oxaliplatin in inhibiting the proliferation of B-RafV600E transformed cancer cells. PLX4032 is effective against the growth of tumors bearing the B-Raf V600E mutation.[Cayman Chemical]

Definition

ChEBI: A pyrrolopyridine that is 1H-pyrrolo[2,3-b]pyridine which is substituted at position 5 by a p-chlorophenyl group and at positions 3 by a 3-amino-2,6-difluorobenzoyl group, the amino group of which has undergone ormal condensation with propane-1-sulfonic acid to give the corresponding sulfonamide. An inhibitor of BRAF and other kinases.

brand name

Zelboraf

Biological Activity

Vemurafenib (PLX4032, RG7204, RO5185426) is a novel and potent inhibitor of B-RafV600E with IC50 of 31 nM in cell-free assay. 10-fold selective for B-RafV600E over wild-type B-Raf in enzymatic assays and the cellular selectivity can exceed 100-fold. Vemurafenib (PLX4032, RG7204) induces autophagy.

in vitro

PLX4032 inhibits B-RAFV600E, C-RAF, as well as wildtype B-RAF, with IC50 of 31 nM, 48 nM and 100 nM, respectively. PLX4032 also inhibits several non-RAF kinases, including ACK1, KHS1, and SRMS, with IC50 of 18 nM to 51 nM. In melanoma cell lines, the inhibitory effect by PLX4032 depends on B-RAF mutational status, because PLX4032 potently inhibits those harboring B-RAF V600 mutants, including V600E, V600D, V600K, and V600R, but not wildtype or other mutants. The IC50 values of PLX4032 on these cells, including MALME-3M, Colo829, Colo38, A375, SK-MEL28, and A2058, ranges from 20 nM to 1 μM. In these cells, PLX4032 (0.1 μM to 30 μM) also inhibits the phosphorylation of both MEK1/2 and ERK1/2. PLX4032 is highly effective in the treatment of melanoma, for its ability of inhibiting B-RAFV600E. However, PLX4032 displays limited effect in colon cancer patients that also carrying B-RAFV600E oncoprotein. The reason for this is that, in colon cancer cells, B-RAFV600E inhibition by PLX4032 results in a rapid feedback EGFR activation, which compensates for the PLX4032-inhibited cell proliferation.

in vivo

In B-RAFV600E-mutant mice xenograft models, PLX4032 (6 mg/kg–20 mg/kg) inhibits tumor growth. In mice xenograft models of LOX, Colo829, and A375 cells, PLX4032 (12.5 mg/kg–100 mg/kg) inhibits tumor growth and prolongs mice survival.

target

B-RafV600E

storage

Store at -20°C

References

1) Khazak?et al. (2007),?Selective Raf inhibition in cancer therapy; Expert Opin. Ther. Targets,?11?1587 2) Tap?et al.?(2010),?Pharmacodynamic characterization of the efficacy signals due to selective BRAF inhibition with PLX4032 in malignant melanoma; Neoplasia,?12?637 3) Lee?et al.?(2010),?PLX4032, a potent inhibitor of the B-Raf V600E oncogene, selectively inhibits V600E-positive melanomas; Pigment Cell Melanoma Res.,?23?820 4) Flaherty?et al.?(2010),?Inhibition of mutated, activated BRAF in metastatic melanoma; N. Engl. J. Med.,?363?809