The Study is Being Conducted to Find a New Treatment for Patients Suffering From Interstitial Cystitis With Hunner's Lesions

Double-blind, Placebo-controlled, Adaptive, Multicenter, Prospective, Randomized, Comparative, Parallel-group Study of the Efficacy and Safety of Neovasculgen (Plasmid Supercoiled Deoxyribonucleic Acid pCMV-VEGF165) in Painful Bladder Syndrome/Interstitial Cystitis (BPS/IC) With Hunner's Lesions

To evaluate the efficacy and safety of Neovasculgen in interstitial cystitis with Hunner's lesions to reduce cicatricial changes in the bladder caused by electrocoagulation and to prevent secondary bladder shrinkage with a decrease in its volume.

Study Overview

• Status: Recruiting
• Conditions: Bladder Pain Syndrome; IC; Hunner Type Interstitial Cystitis
• Intervention / Treatment: Drug: Neovasculgen®; Drug: Placebo

• Study Type: Interventional
• Enrollment (Estimated): 180
• Phase: Phase 2; Phase 3

Contacts and Locations

Study Locations

• Russia
  • Moscow, Russia
    • Recruiting
    • Botkin Hospital
    • Contact: Urolog; Phone Number: +7 985 695 2462; Email: Alex-10k@mail.ru

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Written informed consent prior to any study-related procedures.
2. Women aged 18 to 65 years, inclusive.
3. A confirmed diagnosis of painful bladder syndrome/interstitial cystitis, characterized by pelvic pain associated with filling or emptying the bladder, frequent urination day and night, with symptoms lasting at least 12 months, with the exclusion of a urinary tract infection or other disease that could cause such symptoms.
4. The presence of Hunner's lesions of the bladder during cystoscopy with hydrobougienage of the bladder (2 minutes, 80 cm H2O).
5. A glycated hemoglobin level within the normal range for the patient's age group.
6. Ability to comply with all study requirements, in the opinion of the investigator, including regularly keeping a voiding diary, completing questionnaires, and attending all scheduled study visits.
7. Women who are of childbearing potential must have negative pregnancy test results and must use reliable contraception throughout their participation in the study.

Exclusion Criteria:

1. Any condition that prevents intravesical administration of medications.
2. Received medication or non-medication therapy, including physical therapy, for BPS/IC within 1 month prior to study inclusion.
3. Instillation of any pharmacological agent into the bladder less than 1 month prior to screening.
4. History of chronic drug or alcohol abuse.
5. Pregnant women, planning to become pregnant during the study, or currently breastfeeding.
6. Any other conditions associated with pelvic pain, except for PBS.
7. Pelvic surgery less than 6 months prior to the study.
8. Any intravesical procedures, except for diagnostic cystoscopy, less than 3 months prior to screening.
9. History of allergy or intolerance to the anesthetic or antibiotics that the investigator intends to use during the study.
10. Inability to discontinue anticoagulant/antiplatelet medications at least 5 days prior to each investigational drug administration and resume them on the 4th day after each investigational drug administration (low molecular weight heparin may be used for 3 days after investigational drug administration).
11. Diseases of the urinary tract/bladder (neoplasms, tuberculous and bacterial cystitis, urolithiasis, radiation injury, urethral diverticulum, neurogenic dysfunction of the lower urinary tract) and female genital organs (neoplasms, vaginitis, genital infections).
12. Other conditions that, in the opinion of the research physician, could become an objective obstacle to the patient's participation in the study and/or create additional risks for the patient.
13. A history of intravesical botulinum therapy performed within the last 12 months prior to inclusion in this study.
14. Bladder capacity under anesthesia less than 150 ml.
15. Residual urine volume greater than 50 ml.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo group; Control group, receiving basic therapy: coagulation of Hunner's lesions of the bladder followed by hydrobougienage	Drug: Placebo; The bladder is hydro-bougienated, Hunner's lesions are identified, and electrocoagulation is performed using a resectoscope using standard techniques, followed by repeated hydro-bougienage of the bladder. The drug/placebo is then administered using a cystoscopic injection needle inserted into a rigid or flexible cystoscope inserted through the urethra into the bladder. The drug/placebo is injected evenly along the edges of the coagulated area and into the Hunner's lesion itself, and then evenly along the bladder walls in a series of 30 injections.
Experimental: The investigational therapy group (Neovasculgen); Receiving combination therapy: coagulation of Hunner's lesions of the bladder followed by hydrobougienage and intradetrusor administration of Neovasculgen	Drug: Neovasculgen®; The bladder is hydro-bougienated, Hunner's lesions are identified, and electrocoagulation is performed using a resectoscope using standard techniques, followed by repeated hydro-bougienage of the bladder. The drug/placebo is then administered using a cystoscopic injection needle inserted into a rigid or flexible cystoscope inserted through the urethra into the bladder. The drug/placebo is injected evenly along the edges of the coagulated area and into the Hunner's lesion itself, and then evenly along the bladder walls in a series of 30 injections.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of participants who experienced a treatment effect at study end, within 1 year from treatment start to study end.	Conclusions about the effectiveness of treatment will be made based on the results of cystoscopies, patient complaints and questionnaire results.	within 1 year from treatment start to study end

Collaborators and Investigators

• Sponsor: JSC NextGen

Study record dates

Study Major Dates

• Study Start (Actual): December 29, 2023
• Primary Completion (Estimated): October 30, 2027
• Study Completion (Estimated): October 30, 2027

Study Registration Dates

• First Submitted: January 12, 2026
• First Submitted That Met QC Criteria: March 9, 2026
• First Posted (Actual): March 10, 2026

Study Record Updates

• Last Update Posted (Actual): March 10, 2026
• Last Update Submitted That Met QC Criteria: March 9, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Urogenital Diseases; Male Urogenital Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urinary Bladder Diseases; Cystitis; Cystitis, Interstitial
• Other Study ID Numbers: 01-InterCis-NVG-III

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No