A First-in-human Study to Evaluate the Safety and Tolerability of HB-2121 as a Diagnostic for Celiac Disease
The goal of this clinical trial is to learn about the safety of a single dose of HB-2121 in adults. It will also look at how the body processes the drug. The main questions it aims to answer are: * What side effects do participants have after receiving HB-2121? * How much HB-2121 is in the blood over time? Researchers will follow participants for 30 days after receiving HB-2121 to understand how the drug behaves in the body and how safe it is. Participants will: * Receive one oral dose of HB-2121 * Attend 4 in-person clinic visits for checkups, lab tests, and monitoring * Complete 2 remote visits that include safety lab assessments * Fill out a short daily questionnaire for 7 days about symptoms and health status
• Aged 18 years and older
• Body Mass Index (BMI) between 18 and 45 kg/m2
• Overall good health, as determined by medical history and a physical exam
• No use of an investigational drug in the past 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
⁃ Additional Inclusion Criteria for Healthy Volunteers:
• No diagnosis of celiac disease
• No first-degree relatives (parent, sibling, child) with celiac disease
• Able to eat gluten-containing foods without adverse effects
• No history of autoimmune gastrointestinal disorders such as Crohn's disease, ulcerative colitis, or eosinophilic enteritis
⁃ Additional Inclusion Criteria for Participants with Celiac Disease:
• Biopsy-confirmed diagnosis of celiac disease
• No history of eosinophilic enteritis, autoimmune gastrointestinal disorders such as Crohn's disease or inflammatory bowel disease