Safety and Potential Effect of Innovative Treatment by Adjuvant Injection of Stromal Vascular Fraction From Autologous Adipose Tissue of URethral Stenosis With Endoscopic Urethrotomy

Last updated: March 15, 2024
Sponsor: Assistance Publique Hopitaux De Marseille
Overall Status: Active - Recruiting

Phase

2

Condition

Peyronie's Disease

Enuresis

Urethral Strictures

Treatment

lipoaspiration

autologous ADSVF administration

urethrotomy

Clinical Study ID

NCT05857371
RCAPHM18_0020_1
2022-002175-11
  • Ages 18-85
  • Male

Study Summary

SURF is a randomised controlled, parallel group, single blind phase II study designed to assess the safety and potential efficacy of an innovative therapeutic strategy for urethral stenosis based on adjuvant injection of autologous Adipose-Derived Stromal Vascular Fraction of Adipose Tissue (ADSVF) during endoscopic urethrotomy (standard care).

Eligibility Criteria

Inclusion

Inclusion Criteria:

  • Signed informed consent
  • Male, aged from 18 to 85 years
  • Bulbar urethral stenosis ≤ 3 cm.
  • At least one urethral dilatation or urethrotomy for the bulbar stenosis in the past 24months before diagnosis of stenosis
  • Ability to avoid corticoids or immunosuppressive drugs one month after treatment. Forany patients with either corticoid or immunosuppressive treatment the physician incharge of this treatment will be contacted and asked to give a written approval forone month cessation of the therapy
  • Good general health status according to clinical history and a physical examination
  • BMI > 18 to insure adequate access to abdominal or other subcutaneous adipose tissuefor adipose tissue harvesting

Exclusion

Exclusion Criteria:

  • Urethral stenosis of other location than bulbar
  • Urethral stenosis length > 3 cm
  • Urethral stenosis on reconstructed penis (transgender, post amputation)
  • Prior perineal or pelvic radiotherapy
  • Concurrent urinary tract infection without treatment
  • Concurrent perineal infection
  • Penile cancer < 5 years
  • Current or recent history of abnormal, severe, progressive, uncontrolled infectious,hepatic, haematological, gastrointestinal (except CD), endocrine, pulmonary, cardiac,neurological, psychiatric, or cerebral disease
  • Congenital or acquired immunodeficiencies
  • Contraindication to the anaesthetic or surgical procedure
  • Corticoids or immunosuppressive drugs > 3 months
  • Any active viral infection among the following: HIV, HTLV I and II, VHB, VHC andsyphillis
  • Administrative restricted rights
  • Presence of signs of obstructive voiding symptoms not directly attributable to thestricture at the discretion of the physician
  • Diagnosis of untreated and unresolved BPH benign prostatic hyperplasia or BNC bladderneck contracture
  • Diagnosis of carcinoma of the urethra, bladder or prostate within the last two (2)years

Study Design

Total Participants: 20
Treatment Group(s): 3
Primary Treatment: lipoaspiration
Phase: 2
Study Start date:
March 13, 2024
Estimated Completion Date:
April 30, 2028

Study Description

Urethral stenosis (UrS) is a narrowing of the urethra's caliber. UrS results of ischemic fibrosis of the corpus spongiosum (spongiofibrosis). Fibrosis-induced retraction reduces the size of the urethral lumen. Spongiofibrosis may be due to infections, inflammation, trauma but remains mostly idiopathic.Endo-urethral treatment exposes to a high rate of recurrence (up to 60% depending on the site, length and etiology). The reconstruction treatment is more effective but more complex (use of oral mucosal flap or other substitution tissue, less mastered by the surgical community and more morbid.

The (ADSVF) is an easily accessible source of autologous mesenchymal stem cells. Obtention from lipoaspirates is safe, simple and standardized. Different animal models have demonstrated the pro-healing and anti-fibrotic properties of autologous ADSVF in the urethra corpus cavernous during erectile dysfunction, perineal fistulas during Crohn's disease and systemic sclerosis.

The main objective of this study is to assess the safety and tolerability of ADSVF, as add-on treatment to endoscopic urethrotomy for recurrent bulbar urethral stenosis during the follow-up.

Connect with a study center

  • Assistance Publique Hopitaux de Marseille

    Marseille,
    France

    Active - Recruiting

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