Dabrafenib Mesylate, also known as GSK 2118436B, is a potent and orally active B-raf (BRAF) inhibitor with in vitro IC50 values of 0.65, 0.5, and 1.84 nM for BRAF V600E, BRAF V600K, and BRAF V600D enzymes, respectively. Dabrafenib also inhibits wild-type BRAF and CRAF kinases with IC50 values of 3.2 and 5.0 nM, respectively, and other kinases such as SIK1, NEK11, and LIMK1 at higher concentrations. Some mutations in the BRAF gene, including those that result in BRAF V600E, can result in constitutively activated BRAF kinases that may stimulate tumor cell growth. Dabrafenib inhibits BRAF V600 mutation-positive melanoma cell growth in vitro and in vivo.
Chemical Formula: C24H24F3N5O5S3
Molecular Weight: 615.6612
Elemental Analysis: C, 46.82; H, 3.93; F, 9.26; N, 11.38; O, 12.99; S, 15.62
GSK2118436 Methane sulfonate salt
Brand name: Taflinar
InChi Code: InChI=1S/C23H20F3N5O2S2.CH4O3S/c1-23(2,3)21-30-18(19(34-21)16-10-11-28-22(27)29-16)12-6-4-9-15(17(12)26)31-35(32,33)20-13(24)7-5-8-14(20)25;1-5(2,3)4/h4-11,31H,1-3H3,(H2,27,28,29);1H3,(H,2,3,4)
Appearance: Solid powder
Purity: >98% (or refer to the Certificate of Analysis)
Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.
Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).
Solubility: Soluble in DMSO
Shelf Life: >2 years if stored properly
Drug Formulation: This drug may be formulated in DMSO
Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).
HS Tariff Code: 2934.99.9001
Dabrafenib (GSK2118436, 1 μM) with 0.01 μM GSK1120212 inhibits more than 90% of cell growth in the NRAS mutant clones. GSK2118436 is sufficient to reduce S6P phosphorylation in A375.
Dabrafenib suppresses the PolyP-mediated vascular barrier permeability, upregulation of inflammatory biomarkers, adhesion/migration of leukocytes, and activation and/or production of nuclear factor-κB, tumor necrosis factor-α, and interleukin-6. Dabrafenib inhibits the release of HMGB1 and downregulates HMGB1-dependent inflammatory responses by enhancing the expressions of cell adhesion molecules (CAMs) in human endothelial cells.
Dabrafenib-treated females have mostly immature reproductive tracts with no evidence of ovulation, similar to age-matched controls; however, DAB-treated females have keratinized and histologically open vaginas.
Banzi M, De Blasio S, Lallas A, Longo C, Moscarella E, Alfano R, Argenziano G. Dabrafenib: a new opportunity for the treatment of BRAF V600-positive melanoma. Onco Targets Ther. 2016 May 6;9:2725-33. doi: 10.2147/OTT.S75104. eCollection 2016. Review. PubMed PMID: 27226731; PubMed Central PMCID: PMC4866744.
Spain L, Julve M, Larkin J. Combination dabrafenib and trametinib in the management of advanced melanoma with BRAFV600 mutations. Expert Opin Pharmacother. 2016;17(7):1031-8. doi: 10.1517/14656566.2016.1168805. Epub 2016 Apr 12. Review. PubMed PMID: 27027150.
Zia Y, Chen L, Daud A. Future of combination therapy with dabrafenib and trametinib in metastatic melanoma. Expert Opin Pharmacother. 2015;16(14):2257-63. doi: 10.1517/14656566.2015.1085509. Epub 2015 Sep 2. Review. PubMed PMID: 26331795.
Giurcaneanu C, Nitipir C, Popa LG, Forsea AM, Popescu I, Bumbacea RS. Evolution of melanocytic nevi under vemurafenib, followed by combination therapy with dabrafenib and trametinib for metastatic melanoma. Acta Dermatovenerol Croat. 2015;23(2):114-21. Review. PubMed PMID: 26228819.
Khoja L, Hogg D. Dabrafenib in the treatment of metastatic or unresectable melanoma. Expert Rev Anticancer Ther. 2015 Mar;15(3):265-76. doi: 10.1586/14737140.2015.1014343. Review. PubMed PMID: 25711514.
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