Liposome Encapsulated SN38 (LE-SN38) in Patients With Advanced Cancer

Liposome Encapsulated SN38 (LE-SN38) is an oncology drug product consisting of the active metabolite of irinotecan (CPT-11), a known anticancer drug, encapsulated in a liposome. Formulation of a relatively insoluble compound (SN38) and improvement in drug delivery (pharmacodynamic profile) may be obtained with liposomal formulations. An improved safety and efficacy profile, compared with the pro-drug CPT-11, may be possible. This rationale is supported by the results from animal toxicity studies in both the mouse and dog. LE-SN38 will be infused intravenously every 3 weeks to assess safety and tolerability of study drug until there is disease progression or toxicity requiring early treatment discontinuation. Disease status will be assessed after every second cycle of treatment. In the event of disease progression, study treatment will be discontinued, all end-of-treatment study evaluations will be performed and further treatment options will be reviewed.