A Study to Assess Safety and Efficacy of CHO-H01 as a Single Agent/Combined With Lenalidomide in Subjects With Refractory or Relapsed Non-Hodgkin's Lymphoma

A Phase I/IIa, Open-label, Multicenter Study of the Safety and Efficacy of CHO-H01 as a Single Agent/Combined With Lenalidomide to Subjects With Refractory or Relapsed Non-Hodgkin's Lymphoma

This is a 2-part study. Part 1/Phase 1 of the study will be conducted to determine the safety and tolerability of CHO-H01 in subjects with relapsed/refractory CD20+ non-Hodgkin's lymphoma. It will also determine maximum tolerated dose (MTD) and recommended phase II dose (RP2D).

Part 2/Phase 2a will assess the anticancer activity and safety of CHO-H01 plus lenalidomide in subjects with low-grade relapsed/refractory CD20+ non-Hodgkin's lymphoma.

Phase I FIH study includes subjects with relapsed/refractory CD20 + non-Hodgkin's lymphoma, who may benefit from treatment with CHO-H01. In Phase I of the study, the first 2 cohorts will follow a 2-step modified accelerated titration dose escalation design and subsequent cohorts will follow a standard 3+3 dose escalation design.

The investigational medicinal product, CHO-H01, will be administered via IV infusion once weekly for 4 weeks in Cycle 1 and then once only (on Day 1) in each subsequent 21-day cycle until disease progression or for up to 6 cycles (19 weeks) of treatment.

Once the MTD/RP2D has been confirmed, Phase IIa of the study will be initiated. The purpose of Phase IIa is to assess anticancer activity and safety of CHO-H01 plus lenalidomide in low-grade relapsed/refractory CD20 + non Hodgkin's lymphoma, including follicular lymphoma (Grades 1-3a), marginal zone lymphoma, and small lymphocytic lymphoma.

Inclusion Criteria:

• Life expectancy of >12 weeks.

• Body mass index of 18 to 32 kg/m2.

• Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2.

• Phase I: Have histologically (laboratory test) confirmed CD20 + non-Hodgkin's lymphoma according to the World Health Organization's 2016 classification:

  1. Low grade lymphoma: follicular lymphoma (Grades 1-3a), marginal zone lymphoma, small lymphocytic lymphoma;
  2. Other lymphoma: DLBCL (NOS: to include germinal center B-cell-like [GCB] and activated B-cell-like [ABC]), follicular lymphoma Grade 3b, mantle cell lymphoma; primary mediastinal large B-cell lymphoma.

• Phase IIa: Histologically confirmed CD20 + non-Hodgkin's lymphoma according to the World Health Organization's 2016 classification, only low grade lymphoma: follicular lymphoma (Grades 1-3a), marginal zone lymphoma, small lymphocytic lymphoma.

• Have at least one measurable lesion that is at least 1.5 cm in its largest dimension.

• Off treatment for 30 days from last anti-CD20 infusion until planned administration of CHO-H01.

• If no original sample is available, is willing and able to provide an adequate tumor biopsy sample at Screening.

• Have adequate cardiac function: without clinically significant and/or uncontrolled heart disease.

• Must be sterile, or have a monogamous partner who is surgically sterile, or at least 2 years postmenopausal, or be committed to use an acceptable form of birth control for the duration of the study (male), and for the duration of the study and for 3 months following the last CHO-H01 administration (female).

Exclusion Criteria:

• Must not have a history of egg allergy or allergic reactions to any component of CHO-H01.

• Must not have any known or current illnesses (such as autoimmune disease, unless well controlled or resolved), infection, or other condition that could limit study compliance or interfere with assessments.

• Subjects who have received anti-programmed death-ligand 1 (PD-L1), programmed cell death 1 (PD-1), or cytotoxic T-lymphocyte associated protein 4 (CTLA-4) therapy.

• Subjects who have completed an autologous stem cell transplant within 100 days prior to CHO-H01 therapy or an allogeneic stem cell transplant.

• Subjects with known hepatitis B surface antigen (HBsAg) seropositive or known or suspected active hepatitis C infection with detectable viral load.

• Subjects with known human immunodeficiency virus (HIV) infection

• Subjects who have had radiation therapy, major surgical procedure or live vaccinations within 28 days prior to CHO-H01 administration.

• Subjects with a history of type I hypersensitivity or anaphylactic reactions to murine proteins or to previous infusions of CD20 monoclonal antibodies.

• Subjects who have received (or are receiving) systemic corticosteroids:

  1. At a daily dose higher than 15 mg prednisone or equivalent within 14 days prior to the first administration of CHO-H01;
  2. Topical, inhaled, nasal, and ophthalmic steroids are allowed.

• Inadequate bone marrow, hepatic or renal function.

• Subjects with a history of seizure disorder.

• Subjects who are pregnant or breast feeding.

• Subjects with any contraindications to lenalidomide (Only for phase IIa).