TLR9 Agonist SD-101, Ibrutinib, and Radiation Therapy in Treating Patients With Relapsed or Refractory Grade 1-3A Follicular Lymphoma

Primary Objective:

Phase 1b: - To determine the recommended phase 2 dose (RP2D) of intratumoral SD 101 in
combination with ibrutinib and radiation in subjects with relapsed or refractory B cell
lymphoma . - To determine the safety and tolerability of SD 101 in combination with ibrutinib
and radiation in subjects with relapsed or refractory B cell lymphoma

Phase 2: -To evaluate the efficacy of intratumoral SD 101 in combination with ibrutinib and
radiation in subjects with relapsed or refractory B cell lymphoma by assessing overall
response rate

Secondary Objective:

Phase 2: - To evaluate progression free survival after treatment with intratumoral SD 101 in
combination with ibrutinib and radiation in subjects with relapsed or refractory B cell
lymphoma

- To evaluate the induction of tumor-specific immune responses by treatment with intratumoral
SD-101 in combination with ibrutinib and radiation in patients with relapsed or refractory B
cell lymphoma

Inclusion Criteria

- Biopsy confirmed Grade 1 or 2, or 3A follicular lymphoma; mantle cell lymphoma; or
marginal zone lymphoma. Subjects must have relapsed from or are refractory to prior
therapy.

- Subjects must have at least one site of disease that is accessible for intratumoral
injection of SD 101 (diameter ≥ 10mm), percutaneously.

- Subjects must have at least one site of measurable disease (see Section 10.2.2 for
definition of measurable disease) other than the injection site which is not included
in the radiation field.

- ECOG Performance Status of 0 or 1

- Subjects must be 18 years of age or older.

- Required values for initial laboratory tests:

1. Absolute neutrophil count (ANC) ≥ 1000/mm3 independent of growth factor support

2. Platelets: ≥ 100,000/mm3 or ≥ 50,000/mm3 if bone marrow involvement independent
of transfusion support in either situation

3. Hemoglobin: ≥ 8 g/dL (may be transfused)

4. Creatinine: Creatinine clearance > 25 mL/min

5. AST/ALT: ≤ 3 x ULN

6. Bilirubin: ≤ 1.5 x ULN (except for subjects with Gilbert's Syndrome or of non
hepatic origin)

- Must be at least 4 weeks since treatment with standard or investigational
chemotherapy, biochemotherapy, surgery, radiation, cytokine therapy, and 8 weeks since
any monoclonal antibodies or immunotherapy, and recovered from any clinically
significant toxicity experienced during treatment.

- Women of childbearing potential and men who are sexually active must be practicing a
highly effective method of birth control during and after the study consistent with
local regulations regarding the use of birth control methods for subjects
participating in clinical trials. Men must agree to not donate sperm during and after
the study. For females, these restrictions apply for 1 month after the last dose of
study drug. For males, these restrictions apply for 3 months after the last dose of
study drug.

- Women of childbearing potential must have a negative serum (beta human chorionic
gonadotropin [β-hCG]) or urine pregnancy test at Screening. Women who are pregnant or
breastfeeding are ineligible for this study.

- Life expectancy greater than 4 months.

- Able to comply with the treatment schedule.

- Ability to understand and the willingness to sign a written informed consent document.

Exclusion Criteria

- Autoimmune disease requiring treatment within the last 5 years including systemic
lupus erythematosus, rheumatoid arthritis, multiple sclerosis, Sjӧgren's syndrome,
autoimmune thrombocytopenia, uveitis, or other if clinically significant

- Major surgery or a wound that has not fully healed within 4 weeks of enrollment.

- History of stroke or intracranial hemorrhage within 6 months prior to enrollment.

- Requires anticoagulation with warfarin or equivalent vitamin K antagonists.

- Requires chronic treatment with strong CYP3A inhibitors.

- Vaccinated with live, attenuated vaccines within 4 weeks of enrollment.

- Known history of human immunodeficiency virus (HIV) or active Hepatitis C Virus or
active Hepatitis B Virus infection or any uncontrolled active systemic infection.

- Subjects with active infection or with a fever > 38.50 C within 3 days prior to the
first scheduled treatment.

- Known CNS lymphoma.

- Subjects with a history of prior malignancy with the exception of non melanoma skin
cancer, carcinoma in situ of the cervix, in situ carcinoma of the bladder, or other
malignancy that has undergone potentially curative therapy with no evidence of disease
for the last > 2 years and that is deemed by the investigator to be a low risk for
recurrence.

- History of allergic reactions attributed to compounds of similar composition to SD 101
or ibrutinib

- Treatment with an immunosuppressive regimen of corticosteroids or other
immunosuppressive medication (eg, methotrexate, rapamycin) within 30 days of study
treatment. Note: subjects may take up to 5 mg of prednisone or equivalent daily.
Topical and inhaled corticosteroids in standard doses are allowed.

- Significant cardiovascular disease (ie, NYHA class 3 congestive heart failure;
myocardial infarction with the past 6 months; unstable angina; coronary angioplasty
with the past 6 months; uncontrolled atrial or ventricular cardiac arrhythmias).

- Pregnant or breast feeding.

- Any other medical history, including laboratory results, deemed by the investigator to
be likely to interfere with their participation in the study, or to interfere with the
interpretation of the results.