For research use only.

Catalog No.S7467

LB42708 Chemical Structure

CAS No. 226929-39-1

LB42708 is an orally active farnesyltransferase (FTase) inhibitor with IC50 of 0.8, 1.2, and 2.0 nM toward H-ras, N-ras, and K-ras, respectively.

Purity & Quality Control

Choose Selective FTase Inhibitors

Biological Activity

Description LB42708 is an orally active farnesyltransferase (FTase) inhibitor with IC50 of 0.8, 1.2, and 2.0 nM toward H-ras, N-ras, and K-ras, respectively.
FTase (H-ras) [1]
FTase (N-ras) [1]
FTase (K-Ras) [1]
0.8 nM 1.2 nM 2.0 nM
In vitro

LB42708 potently inhibits the processing of the cellular farnesylated protein p21ras induced by LPS + IFN-γ in murine macrophage cell line RAW264.7 cells. LB42708 inhibits NF-κB activation and iNOS promoter activity through the inhibition of IKK activity. Moreover, LB42708 suppresses the expression of inducible NO synthase, cyclooxygenase-2, TNF-alpha, and IL-1beta and the production of NO and PGE(2) in immune-activated macrophages and osteoblasts. [1] LB42708 irreversibly inhibits growth and induces apoptosis in H-ras and K-ras-transformed rat intestinal epithelial cells. [2] LB42708 inhibits of VEGF-induced tumor angiogenesis by blocking Ras-dependent MAPK and PI3K/Akt pathways in tumor-associated endothelial cells. [3]

In vivo LB42708 (12.5 mg/kg i.p.) inhibits production of NO, PGE2, TNF-α, and IL-1β in LPS-injected mice, and also prevents the development of CIA. [1] LB42708 (20 mg/kg/day i.p.) also inhibits tumor growth and angiogenesis in both Ras wild-type and mutated tumors. [3]


Cell Research:


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  • Cell lines: RIE-1 cells stably transformed with either activated H-ras (RIE/H-ras) or K-ras4B (RIE/K-ras).
  • Concentrations: ~25 μM
  • Incubation Time: 72 hours
  • Method:

    Cell growth is measured by MTT. Briefly, cells were seeded at 2 × 103 cells per well in 96-well culture plates in triplicate. After the addition of various concentrations of drugs, cells are incubated for 72 h. At the end of culture, the plates are washed twice with PBS, and cells are incubated with 200 μl of RPMI 1640 containing 10% FCS and 0.25 mg/ml of MTT at 37 °C for 3 h. The absorbance of each well is measured with Titer-Tech 96-well multiscanner at 570 nm. The viable cell number is proportional to the absorbance.

    (Only for Reference)
Animal Research:


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  • Animal Models: Mice collagen-induced arthritis model.
  • Dosages: 10 mg/kg daily
  • Administration: i.p.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 100 mg/mL (180.03 mM)
Water Insoluble
Ethanol '86 mg/mL warmed

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 555.46


CAS No. 226929-39-1
Storage powder
in solvent
Synonyms N/A
Smiles C1COCCN1C(=O)C2=CN(C=C2C3=CC=CC4=CC=CC=C43)CC5=CN=CN5CC6=CC=C(C=C6)Br

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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID