Talmapimod (SCIO-469)

Cell experiment:

5TMM cells (0.5 × 106/mL) were pretreated with different concentrations of Talmapimod (SCIO-469) in serum-free medium and then placed in the lower compartment of a Transwell system. Syngeneic bone marrow stromal cells were seeded into the Transwell itself. After 18 h, the 5TMM cells were collected from the lower compartment and stained for active caspase-3 with a FITC-labeled antibody according to manufacturer's instructions

Animal experiment:

Animal injection[1]For studies of the effect of Talmapimod (SCIO-469) on myeloma development, three groups of male mice (n = 12) were injected i.v. with 0.5 × 106 5T33MM cells. Mice were left untreated (naive) or, if injected with tumor cells, treated from the time of tumor cells injection with either Talmapimod (SCIO-469) (150 or 450 mg/kg powder diet continuously available for the mice) or a vehicle (PBS) until the first mice showed signs of morbidity (at 3.7 weeks).

References:

[1]. Hideshima T et al. p38 MAPK inhibition enhances PS-341 (bortezomib)-induced cytotoxicity against multiple myeloma cells. Oncogene. 2004 Nov 18, 23(54), 8766-76.
[2]. Navas T, et al. Inhibition of p38alpha MAPK disrupts the pathological loop of proinflammatory factor production in the myelodysplastic syndrome bone marrow microenvironment. Leuk Lymphoma. 2008 Oct;49(10):1963-75.
[3]. Vanderkerken K et al. Inhibition of p38alpha mitogen-activated protein kinase prevents the development of osteolytic bone disease,reduces tumor burden, and increases survival in murine models of multiple myeloma. Vanderkerken K et al.