Efficacy and Safety Study of Selinexor in Relapsed or Refractory Peripheral T-cell Lymphoma or Cutaneous T-cell Lymphoma

Multi-center, Phase 2, Open-label Study of Efficacy and Safety of the Selective Inhibitor of Nuclear Export (SINE™) Selinexor (KPT-330) in Patients With Relapsed or Refractory Peripheral T-cell Lymphoma (PTCL) and Cutaneous T-cell Lymphoma (CTCL)

This is a single-arm, multi-center, open-label phase 2 study of the SINE™ compound selinexor given orally to patients with relapsed or refractory PTCL or CTCL.

Approximately 60 patients with relapsed or refractory PTCL or CTCL who meet the eligibility criteria and have none of the exclusion criteria will be enrolled to receive selinexor until either disease progression or intolerance has occurred.

This is a single-arm, multi-center, open-label phase 2 study of the SINE™ compound selinexor given orally to patients with relapsed or refractory PTCL or CTCL.

Approximately 60 patients with relapsed or refractory PTCL or CTCL who meet the eligibility criteria and have none of the exclusion criteria will be enrolled to receive selinexor until either disease progression or intolerance has occurred.

Enrolled patients will be given selinexor as an oral fixed 60 mg dose (equivalent to ~35 mg/m²) on Days 1 and 3 of Weeks 1-4 of each 4-week cycle (total 8 doses per cycle).

There is no maximum treatment duration. Patients will receive supportive therapy to mitigate selinexor side effects, as well as best supportive care (BSC).

Patients enrolled under Protocol Versions <3.0 were to receive selinexor orally, at a fixed dose of 60 mg (equivalent to ~35 mg/m²) on Days 1 and 3 of Weeks 1-3 of each 4-week cycle (total of 6 doses per cycle). Selinexor was not taken during Week 4.

For all patients enrolled in this study (regardless of the protocol version) who continued onto Cycle 3 and forward, the dose was to be increased by 20 mg to 80 mg (administered on Days 1 and 3 of Weeks 1-4), only after consultation with the Sponsor's Medical Monitor.

Inclusion Criteria:

• ECOG performance status of ≤2.
• Relapsed or refractory disease to at least one prior systemic regimen.
• Measurable disease: according to International Working Group (IWG) guidelines for all patients with PTCL and according to CTCL Response in Skin consensus criteria for all patients with CTCL.
• Objective, documented evidence of disease progression on study entry.

Exclusion Criteria:

• Known active central nervous system (CNS) lymphoma.
• Active graft-versus-host disease after allogeneic stem cell transplantation. At least 4 months must have elapsed since completion of allogeneic stem cell transplantation.
• Unable to swallow tablets or malabsorption syndrome, disease significantly affecting gastrointestinal function.