A Study to Investigate the Safety and Efficacy of LT-02 in Patients With Mesalamine Refractory Ulcerative Colitis (UC)

Key Inclusion Criteria: 1. Established diagnosis of ulcerative colitis (UC), based on clinical history, exclusion of infectious causes, and characteristic endoscopic and histologic findings. 2. Active UC with disease confirmed by endoscopy findings and confirmed by central reader. 3. A modified Mayo Score 4-10, and with a centrally read endoscopy score activity of ≥ 2 points. 4. Mesalamine (5-ASA) refractory. Exclusion Criteria: 1. Diagnosis of Crohn's disease, indeterminate colitis, ischemic colitis, radiation colitis, microscopic colitis (i.e., collagenous colitis and lymphocytic colitis), diverticular disease associated colitis, 2. Toxic megacolon or fulminant colitis, 3. Prior colon resection, 4. Evidence of infectious colitis (e.g., pathogenic bacteria or Clostridium difficile infection) at screening, 5. Known celiac disease 6. Other inflammatory or bleeding disorders of the colon and intestine, or diseases what may cause diarrhea or gastrointestinal bleeding 7. History or presence of ischemic heart disease, myocardial infarction, peripheral arterial disease, ischemic stroke, or transient ischemic attack, 8. Subjects with known hypersensitivity to soy, 9. Treatment with methotrexate, azathioprine, 6-mercaptopurine TNF-alpha-antagonists, vedolizumab or certolizumab pegol, tacrolimus, or anti-integrin therapy within last 8 weeks prior to screening, 10. Treatment with any (topical or systemic) corticosteroid formulation for the treatment of IBD within last 7 days prior to endoscopy, 11. Treatment with other investigational drug within last 8 weeks prior to screening,