A Study of Idelalisib and Rituximab in Elderly Patients With Untreated CLL or SLL
Condition: Chronic Lymphocytic Leukemia (CLL); Small Lymphocytic Lymphoma (SLL)
MeSH terms: Lymphoma; Leukemia; Leukemia, Lymphoid; Leukemia, Lymphocytic, Chronic, B-Cell
Intervention: Idelalisib; Rituximab
Intervention description: Idelalisib 150 mg tablets administered orally twice daily; Rituximab 375 mg/m^2 administered intravenously once weekly x 8 weeks
Intervention MeSH terms: Rituximab; Idelalisib
Phase: Phase 2
Study type: Interventional
Primary purpose: Treatment
Intervention model: Single Group Assignment
Masking: None (Open Label)
Enrollment: 105.0
Sex: All
Minimum age: 65 Years
Healthy volunteers: No
Keywords: CLL; SLL; GS-1101; CAL-101; Phosphatidylinositol 3-kinase (PI3K); Rituximab; Rituxan

Summary:

      This study is to evaluate the safety and clinical activity of idelalisib alone and in
      combination with rituximab in patients with CLL or SLL.

      This Phase 2 study will be the first time that idelalisib is administered to previously
      untreated patients with hematologic malignancies. Idelalisib has demonstrated clinical
      activity as a single agent in relapsed or refractory CLL and SLL with acceptable toxicity,
      which supports its evaluation in previously untreated patients. The study population is
      limited to patients over 65 years of age because younger patients are generally appropriate
      for standard immunochemotherapy regimens that are highly active. Since the mechanism of
      action of idelalisib is distinct from rituximab, it is hypothesized that the combination will
      be more active than either agent alone. This study will establish initial safety and clinical
      activity of idelalisib in combination with rituximab in patients with CLL or SLL. Cohort 2 of
      this study will establish safety and clinical activity of idelalisib alone in subjects with
      untreated CLL or SLL.
    

Eligibility criteria:

        Key Inclusion Criteria:

          -  Histologically or cytologically confirmed CLL or SLL.

          -  Age ≥ 65

          -  Presence of measurable lymphadenopathy (defined as the presence of ≥1 nodal lesion
             that measures ≥ 1.5 cm in the longest diameter (LD) and ≥ 1.0 cm in the longest
             perpendicular diameter (LPD) as assessed by physical exam, computed tomography (CT) or
             magnetic resonance imaging (MRI)).

          -  CLL - Binet Stage C or Rai Stage III or IV or has active disease defined by meeting at
             least one of the following criteria:

               -  Evidence of progressive marrow failure as manifested by the development of, or
                  worsening of, anemia and/or thrombocytopenia

               -  Massive (ie, > 6 cm below the left costal margin) or progressive or symptomatic
                  splenomegaly

               -  Massive nodes (ie, > 10 cm in longest diameter) or progressive or symptomatic
                  lymphadenopathy

               -  Progressive lymphocytosis with an increase of more than 50% over a 2-month period
                  or lymphocyte doubling time of less than 6 months

               -  Autoimmune anemia and/or thrombocytopenia poorly responsive to corticosteroids or
                  other standard therapy

               -  At least one of the following disease-related symptoms:

                    -  Unintentional weight loss ≥ 10% within the previous 6 months

                    -  Significant fatigue

                    -  Fevers > 100.4 F for ≥ 2 weeks without other evidence of infection

                    -  Night sweats for ≥ 1 month without evidence of infection

          -  SLL - has active disease as defined above for CLL, except the lymphocytosis criterion
             does not apply

          -  World Health Organization (WHO) Performance Status of ≤ 2

          -  For men of child-bearing potential, willing to use adequate methods of contraception
             for the entire duration of the study

          -  Able to provide written informed consent

        Key Exclusion Criteria:

          -  Prior therapy for CLL or SLL, except corticosteroids for symptom relief

          -  Treatment with a short course of corticosteroids for symptom relief within 1-week
             prior to Visit 1

          -  Known active central nervous system involvement of the malignancy

          -  Ongoing active, serious infection requiring systemic therapy. Patients may be
             receiving prophylactic antibiotics and antiviral therapy at the discretion of the
             treating physician.

          -  Serum creatinine ≥ 2.0 mg/dL

          -  Serum bilirubin ≥ 2 mg/dL (unless due to Gilbert's syndrome) or serum transaminases
             (ie, aspartate aminotransferase (AST), alanine aminotransferase (ALT)) ≥ 2 x upper
             limit of normal

          -  Positive test for human immunodeficiency virus (HIV) antibodies

          -  Active hepatitis B or C (confirmed by ribonucleic acid (RNA) test). Patients with
             serologic evidence of prior exposure are eligible.

          -  History of a non-CLL malignancy except for the following: adequately treated local
             basal cell or squamous cell carcinoma of the skin, cervical carcinoma in situ,
             superficial bladder cancer, asymptomatic prostate cancer without known metastatic
             disease and with no requirement for therapy or requiring only hormonal therapy and
             with normal prostate-specific antigen for ≥ 1 year prior to study entry, other
             adequately treated Stage 1 or 2 cancer currently in complete remission, or any other
             cancer that has been in complete remission for ≥ 5 years.

        Note: Other protocol defined Inclusion/Exclusion criteria may apply.