Study of Efficacy and Safety of LDE225 in Adult Patients With Relapsed/Refractory Acute Leukemia

Complete Response (CR) was based on the International Working Group (IWG) criteria based on weekly peripheral blood count measurements and bone marrow biopsy/aspiration collection. Efficacy assessments were performed to determine CR. A treatment cycle was defined as 4 weeks. The outcome measure for the study is based on standardized response criteria as defined by the International Working Group (IWG) for AML. The IWG was established by a group of investigators interested in the design and conduct of clinical trials in acute myeloid leukemia (AML). The criteria established by this group (a set of recommendations for response assessment) are well established, endorsed by major institutions and Health Authorities, and are widely used in clinical trials. No statistical analysis was planned for this primary outcome.

The other primary efficacy endpoint was CRi based on the International Working Group (IWG) criteria based on weekly peripheral blood count measurements and bone marrow biopsy/aspiration collection. Efficacy assessments were performed to determine CRi. A treatment cycle was defined as 4 weeks. No statistical analysis was planned for this primary outcome.

ORR was the rate of complete remission (CR), complete remission with incomplete blood count recovery (CRi) or partial response (PR) according to IWG criteria. CR, CRi or PR will be assessed through bone marrow biopsy/aspirate and peripheral blood blasts counts.

Cmax is the maximum observed plasma concentration after drug administration.The PK parameters were determined in plasma using non-compartmental methods. A PK sample was excluded from analyses if the patient vomited within the first 4 hours following the last oral dose of study drug. Other PK samples were excluded as deemed appropriate by the pharmacokineticist. Cmax was derived from the PK concentrations collected at 0, 0.5, 1, 2, 4, 6, 8 and 24 hours post dose on W1D1 and W9D1. The PK concentration at each time point is not an endpoint in the protocol, but these concentrations are used to derive the PK parameters.

Tmax is the time to reach Cmax. The PK parameters were determined in plasma using non-compartmental methods. A PK sample was excluded from analyses if the patient vomited within the first 4 hours following the last oral dose of study drug. Other PK samples were excluded as deemed appropriate by the Pharmacokineticist. Tmax was derived from the PK concentrations collected at 0, 0.5, 1, 2, 4, 6, 8 and 24 hours post dose on W1D1 and W9D1. The PK concentration at each time point is not an endpoint in the protocol, but these concentrations are used to derive the PK parameters.

AUC0-8h is the area under the concentration-time curve from time zero to 8 hours. The PK parameters were determined in plasma using non-compartmental methods. A PK sample was excluded from analyses if the patient vomited within the first 4 hours following the last oral dose of study drug. Other PK samples were excluded as deemed appropriate by the Pharmacokineticist. AUC0-8h was derived from the PK concentrations collected at 0, 0.5, 1, 2, 4, 6, 8 and 24 hours post dose on W1D1 and W9D1. The PK concentration at each time point is not an endpoint in the protocol, but these concentrations are used to derive the PK parameters.

AUC0-24 is the area under the concentration-time curve from time zero to 24 hours done only on 800 mg once a day schedule. The PK parameters were determined in plasma using non-compartmental methods. A PK sample was excluded from analyses if the patient vomited within the first 4 hours following the last oral dose of study drug. Other PK samples were excluded as deemed appropriate by the Pharmacokineticist. AUC0-24h was derived from the PK concentrations collected at 0, 0.5, 1, 2, 4, 6, 8 and 24 hours post dose on W1D1 and W9D1. The PK concentration at each time point is not an endpoint in the protocol, but these concentrations are used to derive the PK parameters.