Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 and up Men only

Relugolix with SBRT for erectile function recovery after prostate cancer therapy

Official title: REDI-CaP (Recovery of Erectile Dysfunction Induced in Prostate Cancer Patients). Innovative Management of Patients With Unfavorable Intermediate-Risk Prostate Cancer: a Special Focus on Quality of Life and Erectile Function Recovery

Run by National Cancer Institute, Naples · NCT07302451 · Data updated 2026-11-12

This study tests whether men with advanced prostate cancer who stop hormone therapy and receive targeted SBRT can regain erectile function within six months.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment50 (estimated)
SponsorNational Cancer Institute, Naples
Academic / other
Drugs / interventionsradiation
Locations1 site (Naples)
StatusRecruiting
StartedFebruary 23, 2026
Main results expectedMay 31, 2027
Study endsFebruary 23, 2031
Registry record updatedJuly 21, 2026
Trial IDNCT07302451 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are men over 18 with unfavorable intermediate-risk prostate cancer, baseline erectile dysfunction not exceeding moderate severity, suitable prostate volume, and willingness to complete all follow-ups.

Probably not a fit

Patients with low-risk or high-risk disease, severe baseline erectile dysfunction, or contraindications to Relugolix or SBRT may derive little to no benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

The trial assigns men to receive Relugolix as androgen deprivation therapy followed by image-guided SBRT. It measures erectile function recovery at six months after stopping hormonal therapy, using the IIEF-5 score with predefined recovery criteria. Participants complete questionnaires on sexual function, quality of life, and financial impact throughout treatment and during follow-up. The study also analyzes how radiation dose and delivery influence cancer control, side effects, and long-term outcomes. Enrollment targets men with unfavorable intermediate-risk prostate cancer who meet specific clinical criteria.

Why it matters

Potential benefit: If successful, participants may experience meaningful recovery of erectile function after completing hormone therapy and radiotherapy.

How similar studies have gone: Prior studies in related approaches suggest potential for functional recovery with hormonal and radiotherapy strategies, but results can vary; this approach explores a specific combination and timing.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male sex. (This criterion is required for the patient population being studied and for the correct data structuring in CTIS.)
* Age \> 18 years;
* Diagnosis of prostate cancer via transperineal core biopsy;
* Classified as unfavorable intermediate-risk (T2b-2c, PSA ≤ 20 ng/mL, and Gleason score 7(4+3); ISUP grade 3);
* Signed informed consent for REDI-CaP protocol;
* Signed consent for REDI-CaP data processing;
* Prostate volume ≤ 80 cc;
* No evidence of prostate capsule invasion (documented by multiparametric MRI of the prostate);
* Performance status: 0-1;
* Negative total-body CT with contrast and bone scan for metastases;
* Negative PSMA PET for secondary lesions;
* IIEF-5 score: ≥ 8;
* Patient compliance with completing periodic questionnaires and attending regular follow-ups as required by the study.

Exclusion Criteria:

* Have prostate cancer classified as low-risk, favorable intermediate-risk, or high-risk;
* Exhibit erectile dysfunction at baseline (IIEF-5 score: \< 8);
* Show positive PSMA PET results for metastases or pelvic lymph nodes;
* Have capsular involvement documented by multiparametric prostate MRI;
* Have contraindications to radiotherapy and/or hormone therapy;
* Are unable to undergo MRI;
* Cannot adhere to periodic tests and follow-ups;
* Refuse or have contraindications to the implantation of intraprostatic fiducials.

Where it's running

  • Istituto Nazionale Tumori - IRCCS - Fondazione G. Pascale - Napoli
    Naples, Italy
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.