T-1201

This clinical development plan for T-1201 will begin with a first-in-human (FIH), open label, multi-center Phase I dose-escalation to evaluate the safety, tolerability, and human pharmacokinetics of T-1201 and determine the maximum tolerated dose (MTD) levels in patients with advanced solid cancer. The further Phase II study will then be designed based on the safety, pharmacokinetics, and preliminary efficacy results from the FIH Phase I study.
The initial part of the Phase I study is a safety, tolerability, and pharmacokinetic phase wherein T-1201 Injection will be intravenous administered to patients with advanced solid cancers. The study will be an open label, multi-center Phase I dose-escalation study. Approximately 30-40 patients will be enrolled for the dose-escalation phase. Actual number of patients will be determined by the number of dose cohorts until maximum tolerated dose (MTD) is reached. The modified accelerated titration design will be used for dose escalation.
The initial dose regimen will be 18 mg/m 2 of T-1201 Injection once every 4 weeks in 28-day cycles. Doses will escalate in the following sequence: 18, 36, 71, 119, 178 and 249 mg/m 2 of T-1201 Injection. Dose escalation will cease when 2/3 or 2/6 patients experience a DLT, or a dose of 249 mg/m 2 is reached. A DLT must occur within the first cycle (Cycle 1) to determine dose escalation between cohorts. If 2/3 or 2/6 patients experience DLTs at the initial dose level of 18 mg/m 2 , 2 more dose levels lower than 18 mg/m 2 will be added to the study.
No human study has been conducted for product T-1201, the benefits/risks of T-1201 is therefore not available at this stage. Since T-1201 is a prodrug of SN-38 with target delivery design, the benefits/risks ratio of T-1201 would thus be expected to be more favorable than irinotecan product (CAMPTOSAR ® , Pfizer).