A Phase I/II Dose-Escalation and Expansion Study of the Selective PKC-β Inhibitor MS-553 in Patients With Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma

The Incidence Rate of DLT and TEAE Requiring Study Drug Discontinuation

时间窗: Assessments for DLT and TEAE will occur during Cycle 1 (28 days) for A1 Cohort and B1 Cohort and Cycles 1-4 (up to 112 days) for C1 Cohort.

DLT are defined as any of the following treatment-emergent events occurring during the DLT evaluation period. 1. Death 2. Hematologic toxicities: • Grade 4 neutropenia for ≥ 7 days • Grade 3 febrile neutropenia: absolute neutrophil count (ANC) 38.3°C (101°F) or a sustained temperature ≥38°C (100.4°F) for \> 1 hour • Grade 4 thrombocytopenia ≥ 14 days (patients with baseline platelet count of ≥ 50 x 109 /L) • Grade 4 thrombocytopenia ≥ 28 days (patients with baseline platelet count \< 50 x 10 9 /L) • ≥ Grade 3 thrombocytopenia associated with ≥ Grade 2 hemorrhage • New ≥ Grade 3 anemia requiring transfusion in a patient previously transfusion independent. 3. Nonhematologic toxicities: • Any other ≥ Grade 3 toxicity not reversed to any one of the following three conditions in 7 days with appropriate intervention: a) baseline; b) \< Grade 1; or c) a status considered to be controlled by the SRC. • Any TEAE requiring \>25% of doses of scheduled study drug to be withheld during the DLT period