T-5224

Cell lines

Human oral squamous carcinoma cell lines, OSC-19 and HSC-3-M3.

Preparation Method

Cells were grown in DMEM supplemented with 10% FBS and penicillin (50 units ⁄ mL) ⁄ streptomycin (50 μg ⁄ mL) in a humidified atmosphere (5% CO₂) at 37°C. T-5224 was dissolved in DMSO and diluted in culture medium to the target concentration for each experiment. For oral gavage administration, T-5224 was dissolved in polyvinylpyrrolidone (PVP) solution according to the manufacturer’s recommended procedure.

Reaction Conditions

Cells were incubated in T-5224 (0–80 μM), and cell counts were carried out at 24, 48, and 72 h after treatment.

Applications

T-5224 treatment could inhibit the invasion activity of highly metastatic tumor cell line HSC-3-M3. Cell migration was potently inhibited by T-5224 in both cell lines in a dose-dependent manner. Migration activity was almost completely inhibited in the medium containing 80 μM T-5224.

Animal models

Female 5–7-week-old BALB⁄ c mice

Preparation Method

HSC-3-M3 (1 x 10⁵ cells) were suspended in 50 μL Hank’s Balanced Salts Solution and injected in the flank of the tongue at day 0. T-5224 was diluted in PVP solution, and T-5224 was given orally to the mice of the treatment group every day from day 1 for 4 weeks.

Dosage form

150 mg⁄ kg

Applications

T-5224 showed significant inhibitory effects against lymph node metastasis in the animal model of HNSCC. The rate of positive metastasis was significantly lower by T-5224 treatment. It is possible that higher doses (150 mg/kg) might be required for cells in which activity of AP-1 is intensively and constitutively activated by genetic mutations or substantial inflammation.

References:

[1]. Daisuke K. et al. Selective activator protein-1 inhibitor T-5224 prevents lymph node metastasis in an oral cancer model. Cancer Sci. 2016 May; 107 (5) 666–673.