As2O3 exerted anti-proliferative and pro-apoptotic activities in CLTC-ALK-positive DLBCL….mice xenografted with LM1 line were treated with vehicle (control) or As2O3 at 5 mg/kg/day for 3 weeks, a dose regimen that has been reported for xenograft mouse model of APL....As2O3 treatment significantly suppressed tumour growth...