A Phase 2 Study Comparing 2 Intermittent Dosing Schedules of Duvelisib in Subjects With Indolent Non-Hodgkin Lymphoma

Inclusion Criteria:

Age ≥ 18 years, ECOG performance status ≤ 2
Histologically confirmed diagnosis of iNHL (Subtypes include FL Grades 1 to 3a, marginal zone lymphoma (splenic, nodal, or extranodal), or SLL
Must have received 1 prior systemic regimen for iNHL
Must have documented radiologic evidence of disease progression, at least 1 bi-dimensionally measurable lesion ≥ 1.5 cm (which has not been previously irradiated), according to 2007 revised IWG criteria, and be a candidate for a subsequent line of therapy.

Must have adequate organ function defined by the following laboratory parameters:

Absolute neutrophil count (ANC) ≥ 1.0 × 10^9/L
Platelet count ≥ 75 × 10^9/L
Hemoglobin ≥ 8 g/dL
Estimated creatinine clearance ≥ 60 mL/min, as determined by the Cockcroft-Gault method
Total bilirubin ≤ 1.5 × upper limit of normal (ULN) (exception: subjects with Gilbert's Syndrome may have a bilirubin > 1.5 × ULN)
Aspartate transaminase (AST)/serum glutamic-oxaloacetic transaminase (SGOT) and alanine aminotransferase (ALT)/serum pyruvic transaminase (SGPT) ≤ 3.0 × ULN

Exclusion Criteria:

Anticancer treatment, major surgery, or use of any investigational drug within 28 days before the start of study intervention; palliative radiation therapy is allowed if > 7 days before planned first dose of study interventions, and any toxicity is Grade ≤ 1
Clinical or histological evidence of transformation to a more aggressive subtype of lymphoma or grade 3b FL or Richters' transformation or CLL
Prior allogeneic hematopoietic stem cell transplant (HSCT); prior treatment with a PI3K inhibitor
History of drug-induced colitis or pneumonitis; TB treatment ≤ 2 years prior to randomization; administration of a live or live attenuated vaccine within 6 weeks of randomization
Ongoing treatment with chronic immunosuppressants or systemic steroids or treatment for systemic bacterial, fungal, or viral infection
Active cytomegalovirus (CMV) or Epstein-Barr virus (EBV) infection
Unable to receive prophylactic treatment for pneumocystis, herpes simplex virus (HSV), or herpes zoster (VZV) at screening
Concurrent administration of medications or foods that are strong inhibitors or inducers of cytochrome P450 3A (CYP3A). No prior use within 2 weeks before the start of study intervention.
Baseline QTcF > 500 ms
Concurrent active malignancy other than non-melanoma skin cancer or carcinoma in situ of the cervix, bladder cancer, or prostate cancer not requiring treatment. Subjects with previous malignancies are eligible if they have been disease-free for 2 years or more.
Unstable or severe uncontrolled medical condition that would, in the Investigator's judgment, increase the subject's risk to participating in this study.