A First-in-Patient Study to Evaluate the Safety and Tolerability of HB-2121 as a Diagnostic for Celiac Disease

Inclusion criteria

• Age 18 to 75 years
• Undergoing esophagogastroduodenoscopy (EGD) for suspected celiac disease
• Body Mass Index (BMI) between 18 and 45 kg/m2
• Creatinine < 1.5 x Upper Limit of the Normal (ULN)
• Total bilirubin ≤ 1.5 mg/dL x (ULN)
• Aspartate aminotransferase (AST)/Serum glutamic oxaloacetic transaminase (SGOT) & Alanine Aminotransferase (ALT)/Serum glutamic pyruvic transaminase (SGPT) ≤ 1.5 x ULN
• Overall good health, as determined by medical history and a physical exam
• No use of an investigational drug within 12 weeks
• Able and willing to follow study procedures and provide written informed consent
• If of childbearing potential, participants must agree to use highly effective birth control during the study period. The same applies to male participants with partners of childbearing potential

Exclusion criteria

• Pregnant, breastfeeding, planning to become pregnant, or intending to donate eggs during the study period
• History of cancer or malignancy
• History of chemotherapy and/or pelvic radiation
• History of congenital long QT syndrome or prolonged QTcF interval
• Prisoners, institutionalized individuals, or individuals who are unable to consent for themselves
• Known HIV infection, or positive test for hepatitis B or C, or other clinically significant chronic liver disease
• Current use of immunosuppressant medications
• Known allergy or sensitivity to any ingredients in the study drug
• History of eosinophilic enteritis, Crohn's disease, or ulcerative colitis