2-part Study to Assess Safety, Pharmacokinetics & Pharmacodynamics of CC-220 & Effect of Food on CC-220 in Healthy Subjects

This is a 2-part study to be conducted at a single study center. Part 1 is a randomized,
double-blind, placebo-controlled, ascending-dose study. During the course of Part 1, each
subject will participate in a screening phase, a baseline phase, a treatment phase and a
follow-up visit. There will be a total of 7 cohorts, each of which consists of a different
dose level, with 8 subjects per cohort. In each cohort, 6 subjects will receive a dose of
CC-220 and 2 subjects will receive placebo depending on the randomization schedule. A single
dose will be administered to each subject. This study design allows safety and tolerability
data to be gathered in a stepwise fashion. Administration of study drug at the next higher
dose level will not begin until the safety and tolerability of the preceding dose have been
evaluated and deemed acceptable by the investigator and sponsor's medical monitor. Part 2 is
an open-label, randomized, 2-period, 2-way crossover study. During the course of Part 2,
each subject will participate in a screening phase, a baseline phase in each study period, a
treatment phase in each study period and a follow-up visit. A total of 10 subjects will
receive a single dose of 1 mg CC-220 in each of 2 study periods, once without food and once
with food, depending on the treatment sequence to which they are randomized. The CC-220 dose
in each study period will be separated by a washout of 11 to 14 days.

Inclusion Criteria:

1. Must understand and voluntarily sign a written informed consent document prior to any
study related procedures being performed.

2. Must be able to communicate with the investigator, understand and comply with the
requirements of the study, and agree to adhere to restrictions and examination
schedules.

3. Healthy male or female of any race between 18 to 55 years of age (inclusive) at the
time of signing the informed consent document, and in good health as determined by a
physical exam.

4. For males:

1. Agree to use barrier contraception not made of natural (animal) membrane [for
example, latex or polyurethane condoms are acceptable]) when engaging in sexual
activity with a female of childbearing potential while on study medication, and
for at least 28 days after the last dose of study medication.

For females:

2. Female subjects must have been surgically sterilized (hysterectomy or bilateral
oophorectomy; proper documentation required) at least 6 months before screening,
or be postmenopausal (defined as 24 months without menses before screening, with
an estradiol level of < 30 pg/mL and follicle stimulating hormone level of > 40
IU/L at screening).

5. Must have a body mass index between 18 and 33 kg/m2 (inclusive).

6. Clinical laboratory tests must be within normal limits or acceptable to the
investigator.

7. Subject must be afebrile, with supine systolic blood pressure: 90 to 140 mmHg, supine
diastolic blood pressure: 50 to 90 mmHg, and pulse rate: 40 to 110 bpm.

8. Must have a normal or clinically acceptable 12-lead electrocardiogram at screening.
Male subjects must have a QTcF value ≤ 430 msec. Female subjects must have a QTcF
value ≤ 450 msec.

Exclusion Criteria:

1. History of any clinically significant and relevant neurological, gastrointestinal,
renal, hepatic, cardiovascular, psychological, pulmonary, metabolic, endocrine,
hematological, allergic disease, drug allergies, or other major disorders.

2. Any condition which places the subject at unacceptable risk if he or she were to
participate in the study, or confounds the ability to interpret data from the study.

3. Used any prescribed systemic or topical medication (including but not limited to
analgesics, anesthetics, etc) within 30 days of the first dose administration, unless
sponsor agreement is obtained.

4. Used any non-prescribed systemic or topical medication (including vitamin/mineral
supplements, and herbal medicines) within 14 days of the first dose administration,
unless sponsor agreement is obtained.

5. Used cytochrome P450, sub-family 3A inducers and inhibitors (including St. John's
Wort) within 30 days of the first dose administration.

6. Has any surgical or medical conditions possibly affecting drug absorption,
distribution, metabolism and excretion, for example, bariatric procedure.
Appendectomy and cholecystectomy are acceptable.

7. Donated blood or plasma within 8 weeks before the first dose administration to a
blood bank or blood donation center.

8. History of drug abuse (as defined by the current version of the Diagnostic and
Statistical Manual) within 2 years before dosing, or positive drug screening test
reflecting consumption of illicit drugs.

9. History of alcohol abuse (as defined by the current version of the Diagnostic and
Statistical Manual) within 2 years before dosing, or positive alcohol screen.

10. Known to have serum hepatitis or known to be a carrier of hepatitis B surface antigen
or hepatitis C antibodies, or have a positive result to the test for human
immunodeficiency virus antibodies at screening.

11. Exposed to an investigational drug (new chemical entity) within 30 days preceding the
first dose administration, or 5 half-lives of that investigational drug, if known
(whichever is longer).

12. Smoke more than 10 cigarettes per day, or the equivalent in other tobacco products
(self reported).

13. Vaccination within 30 days of dosing or plans to receive vaccination within 30 days
after dosing. Systemic infection within 30 days of dosing.