LY 303511

Human neuroblastoma SHEP-1 cells are maintained in DMEM supplemented with 10% fetal bovine serum and 1% Penicillin. In a typical survival assay, SHEP-1 cells (8×10⁴ per well) plated in 24-well plates for 24 h are exposed to LY303511 (12.5, 25, and 50 μM), TRAIL (25, 50, and 100 ng/mL), and a combination of the two (1 h preincubation with LY303511 followed by TRAIL for 4 h). Cytotoxicity is determined by the crystal violet assay. After drug exposure, cells are washed with PBS and incubated for 20 min with crystal violet solution (200 μL). The excess crystal violet solution is washed away with distilled water, and the remaining crystals are dissolved with 20% acetic acid. Viability is determined by absorbance at 595 nm wavelength using an automated ELISA reader. Cell viability experiments are performed similarly with 2,000 units/mL of catalase, 4 μM JNK inhibitor SP600125, 10 μM p38 inhibitor SB202190, 20 μM MAPK/ERK kinase (MEK) inhibitor PD98059, 50 μM of caspase-8 inhibitor Z-IETD-FMK or pan-caspase inhibitor Z-VAD-FMK, or death receptor blocking antibodies (4 μg/mL anti-DR4 or 1 μg/mL anti-DR5), or in cells transfected with small interfering RNA (siRNA) for silencing JNK and ERK expression, respectively. Cells are preincubated for 1 h with LY303511 and the respective inhibitor or catalase before the addition of TRAIL. Similar sensitizing effect of LY303511 on TRAIL-induced apoptosis is carried out with SY5Y neuroblastoma, T98G glioblastoma, Jurkat leukemia, CEM myelogenous leukemia, HeLa ovarian carcinoma, and HT29 colorectal carcinoma cell lines^[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Mice^[4]
Human prostate adenocarcinoma (PC-3) cells (ATCC CRL-1435) are cultured in vitro before harvesting and implantation of 1×10⁶ cells in 20% Matrigel per athymic NCR nude mouse by subcutaneous injection at the flank. Inoculated mice are subdivided into four groups of 10. Administration of vehicle or LY303511, 10 mg/kg/day, is begun (day 1) when tumors reach ~150 mm³ (n=35), and tumor volumes are measured for 30 days at the indicated time points.

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.