Phase 3 Study of Human TH-SC01 Cell Injection for Treating Perianal Fistulas in Patients With Crohn's Disease

Exclusion Criteria22

• Subjects allergic to human serum albumin, human platelet lysate, gentamicin sulfate, anesthetic drugs or MRI contrast agents.
• Subjects with active infection evaluated by the investigator
• Subjects with active Crohn's disease before drug administration or have not completed the induction-phase treatment.
• Subjects with abscess or collections >2 cm.
• Rectal and/or anal stenosis , if this means a limitation for any surgical procedure
• Subjects with concurrent active proctitis.
• Subjects with other fistulas such as rectum/anal canal-vaginal fistulas or rectum-bladder fistulas.
• Patients have undergone a diverting stoma operation in the past, except for patients have completed stoma closure at least one month before drug administration.
• Patients plan to undergo surgery in the perianal area during the trial period due to other diseases other than anal fistula.
• Subjects with abnormal laboratory results: liver function: total bilirubin >=1.5 × ULN, and aspartate aminotransferase (AST) and alanine aminotransferase (ALT) >=2 × ULN; renal function: creatinine clearance below 60 mL/minute calculated using Cockcroft-Gault formula or by serum creatinine >=1.5 × upper limit of normal (ULN).
• Serum virology test (HBeAg, HCV antibody, HIV antibody, Treponema pallidum antibody) positive.
• Subjects with malignant tumors or a history of malignant tumors.
• Subjects with congenital or acquired immunodeficiency.
• Contraindication to MRI scan
• Current or recent history of abnormal, severe, progressive, uncontrolled hepatic, haematological, gastrointestinal (except CD), endocrine, pulmonary, cardiac, neurological, psychiatric, or cerebral disease.
• Subjects received stem cell treatment within two years prior to screening.
• Patient with ongoing steroid treatment or treated with steroids in the last 4 weeks.
• Patient undergone major surgical operations (such as orthopedic surgery, abdominal surgery) within one month before drug administration, or Patient plan to receive surgeries during the study period (except for the surgeries required by the procedures of this trial).
• Patients with a history of drug abuse or alcoholism (Criteria for alcoholism: having a long-term drinking history of more than 5 years, with the amount of ethanol equivalent to ≥40g/d for men and ≥20g/d for women, or having a history of heavy drinking within 2 weeks, with the amount of ethanol equivalent to >80g/d. The conversion formula for the amount of ethanol (g) = the amount of alcohol consumed (ml) × the ethanol content (%) × 0.8).
• Pregnant or lactating women.
• Patients with a history of diverting ostomy, except those who have undergone stoma reversal at least 1 month prior to drug administration.
• Other diseases or conditions that the investigator deems inappropriate for participating in this clinical trial, such as poor subject compliance and the expectation of being unable to complete follow-up and evaluation.