A Study of Durvalumab in Combination With R-CHOP or Lenalidomide Plus R-CHOP in Previously Untreated High-Risk Diffuse Large B-Cell Lymphoma

A Phase 2, Open-label, Multicenter Study to Evaluate the Safety and Clinical Activity of Durvalumab in Combination With Rituximab, Cyclophosphamide, Doxorubicin, Vincristine, Prednisone (R-CHOP) or With Lenalidomide Plus R-CHOP (R2-CHOP) in Subjects With Previously Untreated, High-Risk Diffuse Large B-Cell Lymphoma

This Phase 2, two-arm, open-label study is designed to evaluate the safety, clinical activity, and predictive biomarkers of durvalumab in combination with R-CHOP or R2-CHOP, followed by durvalumab consolidation therapy in previously untreated subjects with high-risk diffuse large B-cell lymphoma (DLBCL). Induction treatment with R-CHOP (± lenalidomide) will last for a total of up to 6 to 8 treatment cycles (21 day cycles), and the total time on study treatment, including durvalumab consolidation, will last up to 12 months.

On 05-Sep-2017, the US FDA has issued a Partial Clinical Hold on this study resulting in the discontinuation of enrollment into Arm B (Durvalumab + Lenalidomide + R-CHOP). After the US FDA Partial Clinical Hold, new eligible participants have been enrolled in Arm A (Durvalumab + R-CHOP).

This research study is conducted in participants with previously untreated, high-risk diffuse large B-cell lymphoma (DLBCL). Patients with high-risk DLBCL typically have insufficient therapeutic outcomes. Therefore, the addition of novel agents to the currently used induction therapy (R-CHOP) is a rational approach to improve therapeutic outcomes in this disease setting.

Based on pre-clinical and clinical observations, it is hypothesized that durvalumab will have activity in DLBCL because the PD 1/PD L1 pathway is involved in the pathophysiology of DLBCL. In particular, the addition of durvalumab may augment the anti-tumor activity of R-CHOP against high-risk DLBCL sub-types.

The safety of durvalumab has already been explored. However, as there is limited clinical experience with durvalumab in DLBCL, the study is divided into two stages:

• A Safety Run-in Stage to evaluate the safety of the treatment combinations until at least 10 subjects are included in each of the two treatment arms
• An Expansion Stage to analyze the clinical activity of the treatment combinations

Results posted following Primary Outcome Completion date are based on a database cut-off of August 2, 2018.

Inclusion Criteria:

1. CD20+Diffuse Large B-Cell Lymphoma.
2. Ann Arbor stage 3 or 4 or stage 2 with bulky disease
3. High or high-intermediate disease risk.
4. No prior anti-lymphoma treatment.
5. Subject is willing and able to undergo biopsy.
6. Investigator considers R-CHOP immunochemotherapy appropriate.
7. Eastern Cooperative Oncology Group (ECOG) performance status of 0-2.
8. Adequate hematology laboratory results (absolute neutrophil count ≥ 1.5 * 10^9/L, platelet count ≥ 75 * 10^9/L, hemoglobin ≥ 10.0 g/dL).
9. Adequate biochemistry laboratory results (aspartate aminotransferase (AST/SGOT) and alanine aminotransferase (ALT/SGPT) ≤ 3.0 * upper limit of normal; bilirubin ≤ 2.0 mg/dL; creatinine clearance of ≥ 40 mL/min).
10. Bi-dimensionally measurable disease (> 2.0 cm).
11. Subject is using effective contraception.

Exclusion Criteria:

1. Diagnosis of lymphoma other than Diffuse Large B-Cell Lymphoma.
2. Composite lymphoma or transformed lymphoma.
3. Primary or secondary Central Nervous System involvement by lymphoma.
4. Seropositive or active viral infection with hepatitis B virus, human immunodeficiency virus or hepatitis C virus.
5. History of other malignancies, unless disease-free for ≥ 5 years.
6. Left ventricular ejection fraction < 50%.
7. Peripheral neuropathy ≥ Grade 2.
8. Prior use of lenalidomide, or monoclonal antibodies against CTLA-4, PD-1, or PD-L1.
9. High risk of developing thromboembolic events, who are unwilling to take venous thromboembolism prophylaxis.
10. Active or prior documented autoimmune or inflammatory disorders within the past 3 years.
11. Current or prior use of immunosuppressive medication within 28 days before start of treatment.