A Phase 1 interventional study of Autologous Engineered Urethral Construct in Urologic Diseases, Male Urogenital Diseases and Urethral Stricture, sponsored by Wake Forest University Health Sciences. Recruiting at 2 sites in United States. Open to male participants aged 21 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-07-28.
Sponsored by Wake Forest University Health Sciences · Phase 1, Interventional, and Treatment
This is a Phase I clinical study to determine the safety and efficacy of using autologous, engineered urethral constructs for the treatment of urethral strictures in adult males.
The proposed study design is a prospective non-randomized and uncontrolled single-center investigation. Autologous urothelial cells (UCs) and smooth muscle cells (SMCs), obtained from enrolled male subjects' bladder tissue samples, will be culture expanded in vitro and used to seed tubular PGA scaffolds to create autologous urethral constructs for the repair of urethral strictures.
This is a Phase I clinical study to determine the safety and efficacy of using autologous, engineered urethral constructs for the treatment of urethral strictures in adult males.
The proposed study design is a prospective non-randomized and uncontrolled single-center investigation. Autologous urothelial cells (UCs) and smooth muscle cells (SMCs), obtained from enrolled male subjects' bladder tissue samples, will be culture expanded in vitro and used to seed tubular Polyglycolic Acid (PGA) scaffolds to create autologous urethral constructs for the repair of urethral strictures.
Male patients, aged 21-65 years old, seen in the Wake Forest Baptist Health urology clinic, referred to or self-referred to the study team, with recurrent urethral stricture, previously treated with dilation, internal urethrotomy, or urethroplasty, will be approached and offered consent to participate in in the trial. Up to 20 men may undergo screening procedures to identify 10 eligible subjects meeting all inclusion and exclusion criteria. All eligible subjects will undergo full thickness bladder tissue biopsies at Wake Forest Baptist Medical Center in Winston-Salem, North Carolina to obtain UCs and SMCs, which will be cultured and expanded and then seeded on tubular PGA scaffolds. Approximately 6 weeks after biopsy, the subjects will return to undergo surgical removal of the stricture and implant of the urethral construct. Subjects will be followed through 36 months.
72 studies on the registry are indexed under Urethral Stricture; 25 are open to participants now.
This study's planned enrollment of 10 is below the median of 60 across 56 interventional studies indexed under Urethral Stricture.
Browse Urethral Stricture studies →Wake Forest University Health Sciences is the lead sponsor of 1,351 studies on the registry; 201 are open to participants now.
Of its 332 completed or terminated interventional studies of FDA-regulated products, 251 (76%) have results posted.
Compared within Urethral Stricture, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Urologic Diseases. The counts are of registry records indexed under each term, refreshed daily. How we classify →
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Stricture of the urethra meeting the following criteria:
a) History of at least one 15-60 mm in length, as determined by urethrography. c) Contains at least 1 strictured segment through which a 16 Fr flexible cystoscope cannot be atraumatically passed.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Platelets
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
All subjects enrolled will undergo a full-thickness bladder biopsy as an out-patient surgical procedure. Urothelial and Smooth Muscle Cells recovered from the biopsy will be isolated and expanded over the next 4-6 weeks, and then seeded onto a tubular scaffold to create the autologous engineered urethral construct. Subjects will undergo a second surgical procedure to excise the urethral stricture and implant the urethral construct. All subjects will be followed for 3 years for safety and efficacy.
Biological: Autologous Engineered Urethral Construct
urethral construct
Incidence of product-related, biopsy procedure-related, and injection procedure-related adverse events
Rate of adverse events reported for each patient
Time frame: monitored through 36 months post treatment
Effectiveness of urethral construct in repairing urethral stricture
Improvement in peak urinary flow rate defined as Qmax improvement from baseline
Time frame: monitored through 36 months post construct implant
Plan to share: No
No publications or documents are linked to this record.
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