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Feasibility and Effect of Wrapping Nerves With a Multi-Layer Perinatal Tissue Allograft During Prostatectomy

RAP: Prospective Pragmatic Multi-Site Trial Evaluating the Feasibility and Effect of Wrapping the Cavernous Nerves With a Novel Multi-Layer Perinatal Tissue Allograft During Prostatectomy

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06940271
Acronym
RAP
Enrollment
45
Registered
2025-04-23
Start date
2025-08-14
Completion date
2030-07-30
Last updated
2026-09-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Localized Prostate Carcinoma, Stage III Prostate Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage I Prostate Cancer AJCC v8

Brief summary

This clinical trial studies whether a new multi-layer perinatal tissue allograft, MLG-Complete (Trademark), can be used to improve complications after nerve-sparing robot-assisted radical prostatectomy (RARP) in patients with prostate cancer that has not spread to other parts of the body (localized). Two major complications that can happen after complete surgical removal of the prostate (radical prostatectomy) include erectile dysfunction and urinary incontinence, both of which greatly affect a patient's quality of life and social well-being. The goal of nerve-sparing radical prostatectomy is to preserve erectile and urinary function, but damage to the surrounding nerves and blood vessels can still occur causing the patient to experience the complications. An allograft is the transplant of an organ, tissue, or cells from one individual to another individual of the same species who is not an identical twin. The MLG-Complete allograft is made up of perinatal tissue and is placed on the nerve bundles during a nerve-sparing RARP. It is meant to serve as a barrier and provide coverage to the nerve bundles from the surrounding environment, which may improve post-nerve-sparing RARP complications.

Interventions

PROCEDUREAllografting

Undergo placement of MLG-Complete allograft

OTHERSurvey Administration

Ancillary studies

Sponsors

Mayo Clinic
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
45 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Male subjects with age ≥ 45 * Primary diagnosis of prostate cancer selected for surgical intervention (radical prostatectomy) * Primary diagnosis of organ confined (i.e. localized) untreated prostate cancer * Planned elective radical prostatectomy with bilateral nerve sparing technique * Patient has no erectile dysfunction (SHIM score ≥ 19) at the time of consultation * Willing to comply with instruction of the investigator * Willing to comply with follow-up surveys * Ability to provide written consent * Negative urinary tract infection at the time of consultation * Interest in penetrative sexual intercourse

Exclusion criteria

* High-risk cancer planned for neoadjuvant therapy, full or partial excision of neurovascular bundles * Unable to comply with learning and documenting penile rehabilitation, including oral 5-phosphodiesterase inhibitor use, vacuum pump therapy use, and/or injectable medications * History of \>14 days treatment with immunosuppressants (including systemic corticosteroids), cytotoxic chemotherapy within one month prior to initial screening, or who receive such medications during the screening period * Prior hormonal therapy such as Lupron or oral anti-androgens * Poor urinary control at baseline requiring the use of pads for leakage * Previous history of pelvic radiation * Previous history of simple prostatectomy or transurethral prostate surgery * Patients with obesity defined as body mass index (BMI) \> 40 kg/m\^2 * History of open pelvic surgery ≤ 5 prior to registration (except for hernia repair) * Scheduled to undergo chemotherapy, radiation, hormone therapy, or open surgery during the study period * Any neurologic disorder or psychiatric disorder that might confound postsurgical assessments * Has any condition(s) which seriously compromises the subject's ability to participate in this study, sign consent, or has a known history of poor adherence with medical treatment * In the opinion of the principal investigator (PI), has a history of drug or alcohol abuse ≤ 12 months prior to registration * Allergic to aminoglycoside antibiotics (such as gentamicin and/or streptomycin) * Received administration of an investigational drug within 30 days prior to registration, and/or has planned administration of another investigational product or procedure during participation in this study

Design outcomes

Primary

MeasureTime frameDescription
Ability to place MLG-Complete allograft without lengthening operative time (Feasibility)Baseline [time of robot-assisted radical prostatectomy (RARP)]Feasibility is defined as the overall technical ability to place the MLG-Complete allograft in included patients without significantly lengthening operative time. This will be defined by a yes/no evaluation by the surgeon.
Incidence of serious adverse events related to graft placementUp to 6 weeks post-RARPWill be assessed according to the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0.

Secondary

MeasureTime frameDescription
Average time for return of potencyAt 6-weeks and 3-, 6-, and 12-months post RARPWill be defined as the ability to achieve an erection sufficient for intercourse for at least 50% of the time or at least 50% rigidity post RARP. Will be assessed using the Sexual Health Inventory for Men (SHIM) and patient-reported history. The SHIM is a five-question instrument with a score of 1-25 points. A higher score generally indicates greater ability to achieve an erection.
Average time for return to continenceAt 6-weeks and 3-, 6-, and 12-months post-RARPReturn to continence will be defined as use of =\< 1 pad post-RARP.
Change in SHIMAt baseline, 6-weeks post-RARP, and 3-, 6-, and 12-months post-RARPSexual Health Inventory for Men (SHIM) scores will be collected at study enrollment, 6 weeks, 3 months, 6 month, and 12 months. The SHIM consists of five questions that explore aspects of erectile function. Scores range from 1-25. A score of 20 or higher indicates a normal degree of erectile functioning. Lower scores (10 or less) indicate moderate to severe erectile dysfunction (ED).
Change in AUASSAt baseline, 6-weeks post-RARP, and 3-, 6-, and 12-months post-RARPThe American Urological Association Symptom Score (AUASS) consists of 5 questions related to urological symptoms over the past month. Questions are answered on a scale of 0-5 where 0=not at all and 5=almost always and one question related to nighttime urination (times per night average over the past month). A lower overall score indicates lesser urological symptoms.
Change in Quality of Life - AUASS surveyAt baseline, 6-weeks post-RARP, and 3-, 6-, and 12-months post-RARPAssessed with a single survey question answered on a scale of 0-6 where 0=delighted and 6=terrible.
Change in ICIQ-UIAt baseline, 6-weeks post-RARP, and 3-, 6-, and 12-months post-RARPThe International Consultation on Incontinence Questionnaire: Short Form for Urinary Incontinence (ICIQ-UI) is a 4-item questionnaire related to urine incontinence over the past 4 weeks. A higher summary scores indicates worse incontinence.
Change in QoL - EPIC-26At baseline, 6-weeks post-RARP, and 3-, 6-, and 12-months post-RARPThe Expanded Prostate Cancer Index Composite (EPIC-26) is a 26-item questionnaire related to Quality of Life issues in patients with Prostate Cancer. The survey consists of 26 items under 5 domains: urinary incontinence, urinary irritative/obstructive, bowel, sexual, and hormonal.
Cost/value analysisUp to 12 months post-RARPCosts of prescription \[Oral Phosphodiesterase 5 Inhibitor (PDE-5i), Intracavernosal injection, Alprostadil urethral suppository) or future surgery (inflatable penile prosthesis\] will be recorded.
Unplanned interactions with the healthcare teamUp to 12 weeksThe proportion of patients with an unplanned phone call, portal message, or unscheduled clinic, emergency room, or urgent care visit will be computed and presented. The total number of unplanned phone calls, portal messages, or health care visits will be summarized.

Countries

United States

Contacts

CONTACTClinical Trials Referral Office
mayocliniccancerstudies@mayo.edu855-776-0015
PRINCIPAL_INVESTIGATORRam A. Pathak, MD

Mayo Clinic

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 12, 2026