A Study of MDX-1100 in Subjects With Active Ulcerative Colitis

Inclusion criteria

• Subjects with active UC on either 5-ASA,corticosteroids,azathioprine(AZA) and or/6-mercaptopurine(6-MP);
• Mayo score of 6 to 10 points with moderate to severe disease on endoscopy
• Subjects on the following medications;

• prednisolone ≤ 20 mg daily (or equivalent) (dose must be stable for at least 2 weeks prior to study drug administration)
• 5-ASA (dose must be stable for at least 4 weeks prior to study drug administration)
• AZA or 6-MP (dose must be stable for at least 3 months prior to study drug administration)
• Rectal steroids or 5-ASA (must have been stable for at least 4 weeks prior to study drug)

Exclusion criteria

• Anti-TNF therapy within 8 weeks before study drug administration
• Contraindication to colonoscopy or sigmoidoscopy
• Primary or secondary immunodeficiency
• Autoimmune disease besides UC, with the exceptions of Sjogren's syndrome or hypothyroidism
• History of malignancy, excluding adequately treated and cured basal or squamous cell of the skin, or cervical carcinoma in situ
• Evidence of acute or chronic infection
• Clinically significant disease requiring medication