A Phase 2, Pilot, Multicenter, Randomized, Placebo-Controlled Sequential, Ascending Dose Study to Characterize the Safety, Tolerability, Pharmacokinetic and Pharmacodynamic Activity of CC-930 in Subjects With Recalcitrant Discoid Lupus Erythematosus (DLE)

Inclusion Criteria:

1. Male or female with clinical diagnosis of Discoid Lupus Erythematosus (DLE) aged 18
to 64 years

2. Good health as assessed by Investigator

3. DLE for at least 16 weeks prior to screening and consistent histological findings.

4. Considered a candidate for systemic therapy. May be naïve to systemic therapy or
experiencing incomplete or refractory disease on systemic therapy.

5. Cutaneous Lupus Area and Severity Index (CLASI) activity score of at least 10, as
determined by investigator.

6. Subjects using hydroxychloroquine, chloroquine, or quinacrine must have documented
ophthalmologic exam within 24 weeks of baseline visit.

7. Must meet laboratory criteria for white blood cells, absolute neutrophils, platelets,
serum creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT),
bilirubin and hemoglobin.

8. Subjects, male and female, must agree to strict pregnancy prevention and testing
requirements.

Exclusion Criteria:

1. Significant illnesses as determined by physician.

2. History of significant cardiac conditions or interventions within prior 6 months
including abnormal electrocardiogram (ECG) findings.

3. Systolic blood pressure < 95 or > 150 mm Hg

4. Diastolic blood pressure > 90 mm Hg.

5. Pregnancy or breast feeding.

6. Other dermatological conditions that would interfere with CLASI Activity Score
assessments.

7. History of or active; malignancy, human immunodeficiency virus (HIV), tuberculosis
infection, other mycobacterial infection, congenital or acquired immunodeficiency,
Hepatitis B and C.

8. Clinically significant abnormality on chest X-ray.

9. Participation in multiple CC-930 cohorts.

10. History of thrombolytic event.

11. Positive tests for lupus anticoagulant, anti-cardiolipin antibodies, antibodies to
beta-2 glycoprotein 1 or phosphatidylserine at screening.

12. Positive antineutrophilic cytoplasmic antibody (ANCA) at screening.

13. Diagnosis of SLE.

14. Presence or history of medically significant Systemic Lupus Erythematosis (SLE) or
Lupus Erythematosis (LE) comorbidities.

15. History of seizures, chorea or psychosis.

16. Presence or history of persistent proteinuria or urinary cellular casts.

17. Prohibited prior or concomitant medications.