NCT05232578

Brief Summary

The primary objective of the trial is to compare the impact and safety of delayed salvage therapy (dSRT, i.e., SRT initiated at PSA values of 0.4-0.5 ng/ml) to those of early salvage therapy (eSRT, i.e., at PSA levels of 0.2 ng/ml) in patients with biochemical relapse after radical prostatectomy. The secondary objective of the trial is to perform analysis of the subgroups of patients to determine which patients are most likely to benefit from dSRT Exploratory objective of the trial is to determine whether selected molecular genetic parameters (172 candidate genes and molecular alterations) and known clinical parameters can be used to identify potential predictors of worse prognosis in patients with known risk factors for relapse after radical prostatectomy, thereby augmenting and refining patient stratification, optimizing their therapy, and clarifying the proper timing of multimodal therapy

Trial Health

65
Monitor

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
380

participants targeted

Target at P50-P75 for phase_3 prostate-cancer

Timeline
80mo left

Started Sep 2022

Longer than P75 for phase_3 prostate-cancer

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress36%
Sep 2022Dec 2032

First Submitted

Initial submission to the registry

November 24, 2021

Completed
3 months until next milestone

First Posted

Study publicly available on registry

February 10, 2022

Completed
7 months until next milestone

Study Start

First participant enrolled

September 1, 2022

Completed
10.3 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 1, 2032

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

December 1, 2032

Last Updated

August 3, 2022

Status Verified

August 1, 2022

Enrollment Period

10.3 years

First QC Date

November 24, 2021

Last Update Submit

August 2, 2022

Conditions

Keywords

prostate carcinomasalvage therapybiochemical relapse

Outcome Measures

Primary Outcomes (1)

  • Event-free survival (EFS)

    Defined as a time to re-documented biochemical relapse after salvage therapy (bRFS), demonstration of clinical relapse (i.e.,local relapse /lRFS/, locoregional relapse /lrRFS/, distant relapse /MFS/) and/or death from any cause.

    Analysed 3 years after randomisation of the last patient.

Secondary Outcomes (4)

  • Carcinoma-specific survival (CSS)

    Analysed 5/10 years after randomization of the last patient.

  • Overall survival (5y- and 10y- OS)

    Analysed 5/10 years after randomization of the last patient.

  • Incidence of treatment-related acute and late toxicity

    Analysed 5 years after randomization of the last patient.

  • Health-related quality of life (QoL) assessment.

    Analysed 5 years after randomization of the last patient.

Study Arms (2)

Arm A- early salvage radiotherapy (eSRT)

EXPERIMENTAL

Early salvage radiotherapy (eSRT) will be administered immediately after the confirmation of the biochemical relapse (prostate-specific antigen PSA level increase to ≈ 0,2 ng/ml) after radical prostatectomy with defined risk factors and no clinical recurrence signs on prostate specific membrane antigen positron emission tomography and computed tomography (PSMA PET/CT).

Radiation: Early salvage radiotherapy (eSRT)

Arm B- delayed salvage radiotherapy (dSRT)

EXPERIMENTAL

The patient is by the biochemical relapse analysis (PSA level 0,2 ng/ml) referred for further follow-up of PSA values. dSRT is initiated, if PSA further increase to values of ≥ 0.4 ng/ml is confirmed and the presence of a potential clinical relapse is excluded with repeated PSMA-PET-CT in line with standard procedures

Radiation: Delayed Salvage radiotherapy (dSRT)

Interventions

eSRT administered immediately after the confirmation of the biochemical relapse (PSA ≈ 0.2ng/ml). 66-70Gy will be delivered to the bed of prostate. Radiotherapy will be optionally accompanied by androgen deprivation therapy.

Arm A- early salvage radiotherapy (eSRT)

dSRT administered if PSA levels increase to ≥ 0.4 ng/ml. 66-70Gy will be delivered to the bed of prostate. Radiotherapy will be optionally accompanied by androgen deprivation therapy.

Arm B- delayed salvage radiotherapy (dSRT)

Eligibility Criteria

Age18 Years+
Sexmale
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • \> 18 years of age
  • Pathologically confirmed invasive prostate carcinoma with minimal 1 risk factor (RF) after radical prostatectomy (RP)
  • Patient refuses the adjuvant therapy after normalization of urinary function within 6 month after RP
  • Signed informed consent to participate in the study and (where necessary) consent to participate in the translational part of the research (not a requirement)
  • ECOG 0 - 1
  • pT2 and minimal 1 risk factor (RF):
  • R1 (PSM), and/or
  • Gleason score (4+3=7) 8-10 and/or ISUP grade group 3-5
  • pT3a /pT3b with or without one RF
  • No evidence of suspicious pelvic lymph nodes by initial diagnostic: cN0 and/or pN0
  • No evidence of suspicious distant metastases by initial diagnostic: M0
  • Patient with decline of PSA level to undetectable PSA levels (\< 0,1 ng/ml) or around 0,2ng/ml and with another decreasing trends so that the PSA level decline within 12-24 weeks after RP to undetectable levels (\< 0,1 ng/ml) and with renewed increase of PSA \>0,2 ng/ml (BCR= biochemical relapse) without any clinical relapse on PSMA PET/CT
  • No hormonal therapy prior and /or after the radical prostatectomy
  • Patient suitable and fit for subsequent radiotherapy with high likelihood of good compliance to the follow-up

You may not qualify if:

  • Life expectancy (based on Charlson comorbidity index) \< 10 years
  • Patient not fit for the therapy
  • History of other cancer (other than a radically removed non-melanoma skin carcinoma)
  • Previous pelvic irradiation
  • Active immunosuppressive medication
  • History of hormone therapy prior to randomization
  • cN1 and/or pN1 and M1

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Related Publications (27)

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MeSH Terms

Conditions

Prostatic Neoplasms

Condition Hierarchy (Ancestors)

Genital Neoplasms, MaleUrogenital NeoplasmsNeoplasms by SiteNeoplasmsGenital Diseases, MaleGenital DiseasesUrogenital DiseasesProstatic DiseasesMale Urogenital Diseases

Central Study Contacts

Sona Argalacsova, MD, PhD

CONTACT

Otakar Capoun, MD, PhD

CONTACT

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
NONE
Purpose
TREATMENT
Intervention Model
PARALLEL
Model Details: A "balanced design" is used for the 1:1 randomization into two arms A and B:
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Principal Investigator, Radiation oncology head

Study Record Dates

First Submitted

November 24, 2021

First Posted

February 10, 2022

Study Start

September 1, 2022

Primary Completion (Estimated)

December 1, 2032

Study Completion (Estimated)

December 1, 2032

Last Updated

August 3, 2022

Record last verified: 2022-08

Data Sharing

IPD Sharing
Will not share