About this trial
This clinical trial is being conducted by investigators who are colorectal surgeons. Eligible study participants will receive the experimental treatment E-CEL UVEC cells by direct injection into the anal fissure. The study is being conducted to determine if E-CEL UVEC cell injections will be safe and would have any effects on healing of the anal fissure.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Adults 18 years and older
Anterior or posterior chronic anal fissure (CAF) - chronicity defined as presence of anal fissure ≥ 6 weeks
Inadequate response to medical treatment of anal fissure (1 month of failed vasodilator treatment plus declined or failed botulinum injection treatment)
Recent history of pain on defecation at a level 4 or higher on the numerical rating scale (NRS)
Disqualifiers
Lateral anal fissure
Presence of peri-anal or rectovaginal fistula, rectal or anal stenosis, or peri-anal abscess or non-healing peri-anal post-surgical wounds that are not anal fissures (subjects with history of anorectal surgery with healed surgical wound is not excluded)
Active, untreated or medically unresponsive infection of the anal fissure or fistula (e.g., erythema and pus)
Active systemic infection (e.g., bacteremia, sepsis) - stable, controlled and treated HIV+ subjects (e.g., recent plasma HIV RNA <200 copies/mL) are not excluded
Trial design
Single group
Treatments tested in this trial
E-CEL UVEC cells (AB-207)
Biological/VaccineAllogeneic (consented-maternal donor) E4ORF1+ (pro-survival gene transduced) human umbilical vein endothelial cells (percutaneous injection formulation)
Treatment groups
Trial outcomes
Primary outcomes
Number of severe injection site reactions
Severe refers to Grade ≥ 3 as per CTCAE v5.0 terms and grading
Number of severe injection site reactions that are serious adverse events related to IP
Proportion of treated responders
Treated responders defined as absence of the anal fissure with digital (e.g., index finger) palpation by investigator (supplemented by photo-documentation whenever possible) from baseline
Secondary outcomes
Changes in severity of pain on defecation (NRS) from (Day 0) baseline
Based on Numerical Rating Scale (NRS) measures at timepoints compared to baseline. Scale ranges from 0-10 with 0 representing no pain and severity of pain increasing chronologically.
Proportion of treated responders
Treated responders defined as absence of the anal fissure with digital (e.g., index finger) palpation by investigator (supplemented by photo-documentation whenever possible) from baseline (Day 0)
Change in proportion of subjects
Subjects with ≥ 50% reduction in pain-on-defecation (NRS) from baseline (Day 0)
Proportion of treated subjects who have complete cessation of fissure-related symptoms
Sponsors and contacts
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Weill Medical College of Cornell University
Lead sponsor
Angiocrine Bioscience
Collaborator