An Efficacy and Safety Study of LYC-30937-EC in Subjects With Active Ulcerative Colitis

Approximately 120 subjects will be randomized to receive either enteric-coated (EC)
LYC-30937-EC 25 mg PO once daily (QD) or matching placebo PO QD for the duration of 8 weeks.
Randomization will be stratified based on previous exposure to anti-tumor necrosis factor
(TNF) agents such that at least 50% of the randomized subjects will be anti-TNF naïve .

The study will consist of 3 phases:

- screening phase: up to 4 weeks

- double-blind placebo-controlled phase treatment: 8 weeks

- post-treatment follow-up: 2 weeks

Eligible subjects will be randomized at Week 0 (Study Day 1) to either LYC-30937-EC 25 mg or
placebo. Screening will occur from Study Days -28 to -1. Randomization and first dosing will
occur at Week 0/Study Day 1. Double-blind study visits will occur at Weeks 2, 4, and 8, with
the last dose at Week 8/Study Day 57. Subjects will return at Week 10 for a post-treatment
safety follow-up visit.

Inclusion Criteria:

- Clinical UC diagnosis ≥ 6 months prior to screening with minimum disease extent of ≥
15cm from anal verge.

- Active UC defined as a TMS of 4-11 (inclusive) with endoscopic subscore of ≥ 2 and
rectal bleeding subscore of ≥ 1 at screening.

- Females of childbearing potential must have a negative pregnancy test at screening and
baseline visits and must agree to use acceptable methods of birth control while in the
trial and for 30 days after taking the last dose of study drug.

- May be currently receiving treatment with oral aminosalicylates (ASA) for ≥ 6 weeks at
a stable dose for ≥ 3 weeks prior to the screening screening endoscopy and/or
thiopurine at a stable dose ≥ 8 weeks prior to the screening endoscopy and/or
prednisone (dose 20 mg daily) or equivalent for ≥ 4 weeks and receiving stable dose
for ≥ 2 weeks prior to screening endoscopy

- able to provide written informed consent and be compliant with study procedures.

Exclusion Criteria:

- History of Crohn's disease (CD) or indeterminate colitis or the presence or history of
fistula consistent with CD.

- Presence of colon polyps.

- Severe extensive disease that in the investigators discretion is likely to require
colonic surgery during the 8 week double-blind portion of the trial (eg, fulminant
colitis, toxic megacolon, bowel perforation, evidence of acute abdomen).

- History of alcohol or drug abuse within 1 year of randomization.

- History of cancer including solid tumors and hematological malignancies (except basal
cell and in situ squamous cell carcinomas of the skin that have been adequately
treated with no recurrence for ≥ 1 year prior to screening.

- History or currently active primary or secondary immunodeficiency.

- Clinically relevant hepatic, neurologic, pulmonary, ophthalmological,
gastrointestinal, endocrine, psychiatric, or other major systemic disease making
implementation of the study difficult or that would put the subject at risk by
participating in the study

- Positive test for Clostridium difficile or positive stool culture for enteric
pathogens or presence of ova or parasites at screening.

- Liver function tests > 1.5 x upper limit of normal (ULN) or direct bilirubin > 1.5 x
ULN

- Hemoglobin < 8.5 g/dl

- Neutrophils < 1500/mm3

- White blood cell (WBC) count < 3000/mm3

- Platelets < 80000 mm3

- International normalized ratio (INR) > 1.5

- Treatment with an immunosuppressant agent within 8 weeks of screening.

- Previous exposure to ≥ 2 approved or investigational biologic agents to treat UC.

- History of UC treatment with a biologic agent within 12 weeks of screening.

- Treatment with rectal steroids within 2 weeks of screening.

- Treatment with an investigational agent within 30 days of screening.