Efficacy and Toxicity of Liposomal Daunorubicin Included in PVABEC Regimen for Aggressive NHL of the Elderly

Liposomes used for delivering antineoplastic drugs to sites of disease are able to minimize side effects and enhance therapeutic efficacy. Liposomal Daunorubicin (Daunoxome; DNX) has a selective and higher accumulation in neoplastic tissues and seems to be able to escape Multi-Drug Resistance (MDR). We treated 35 elderly patients with aggressive non-Hodgkin's lymphoma (NHL) with PVBECDNX, a regimen analogue to P-VABEC in which doxorubicin is replaced with DNX at a dose of 50 mg (first 13 patients) and thereafter 50 mg/m2. Twenty-six out of 35 patients were evaluable for response; 15 obtained a CR, 5 a PR (overall response rate of 77%). After a median follow-up of 13 months the 2-years actuarial overall survival was 75% and the failure-free survival was 71%. Two patients out of six no responders died because of progression of disease, and one died in CR because of pre-existing cardiovascular disorders. Eight patients did not tolerate DNX infusion (back pain). Non-haematological toxicity was mild. This study confirms that PVABEC-like regimens are able to induce a high overall response rate in a percentage of patients affected by aggressive lymphoma and shows that DNX is as effective as Daunorubicin in these disorders, but its acute toxicity is reduced.