- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT02761889
Hypofractionated Image-Guided Radiotherapy (IGRT) med organbevægelsesdæmpning og urethral sparing for prostatakræft
Nærværende undersøgelse evaluerer de kliniske resultater efter endelig ultrahøj dosis pr. fraktion ekstern strålebehandling afgivet til patienter med organbundet adenokarcinom i prostata.
Patienter indskrevet i undersøgelsen vil gennemgå billedstyret, volumetrisk intensitetsmoduleret lysbuestrålebehandling (IGRT-VMAT) med avancerede behandlingsplanlægnings- og kvalitetssikringsprocedurer med vægt på normal vævssparing og leveringsnøjagtighed via brug af enheder, der sikrer stabilitet og stråleplaceringsreproducerbarhed. En rektal ballon med luftfyldning vil blive brugt til immobilisering af prostatamål og anatomisk reproducerbarhed, mens et urinrørskateter fyldt med beacon-transpondere vil blive brugt til at sikre opsætningsreproducerbarhed og online målsporing. Tidligere ubehandlede patienter med prostatacancer vil blive behandlet med 45 Gy i fem fraktioner af 9 Gy over 5 på hinanden følgende dage.
Patienterne vil blive fulgt én måned efter behandlingen og hver 3. måned i op til 12 måneder (+/- 4 uger) og hver 6. måned (+/- 6 uger) derefter. Akut og sen toksicitetsvurderinger vil fokusere, men ikke udelukkende, på urin-, rektale- og seksuelle funktioner og vil blive vurderet gennem valideret Expanded Prostate Cancer Index Composite (EPIC), International prostata symptom score (IPSS) og International index of erektil funktion (IIEF) spørgeskemaer. Serum prostataspecifikt antigen (PSA) værdier vil blive tegnet efter samme tidsplan som klinisk opfølgning. Patienterne vil blive monitoreret kontinuerligt i minimum 5 år.
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
This is a prospective, single-arm phase II study of definitive ultra-hypofractionated image-guided radiotherapy for localized prostate adenocarcinoma. The study is designed to evaluate the acute and late safety profile, feasibility, patient-reported quality-of-life outcomes, PSA kinetics, biochemical relapse-free survival, and clinical outcomes of dose-escalated IGRT-VMAT using organ-motion mitigation and urethral sparing.
Patients will receive 45 Gy in 5 fractions of 9 Gy each. Treatment planning will use CT/MRI-based target and organ-at-risk delineation. The protocol incorporates a rectal balloon for prostate stabilization and anatomical reproducibility, a urethral catheter loaded with beacon transponders for urethral localization and online motion tracking, and inverse dose-painting to reduce urethral dose when compatible with target coverage and disease anatomy. Erectile-related structures, including the neurovascular bundles, urogenital diaphragm, and penile bulb, may be contoured and recorded for quality-of-life and dosimetric analyses.
The primary safety assessments are treatment-related Grade 3 or higher gastrointestinal or genitourinary toxicity occurring from the first protocol fraction through 90 days after treatment completion, and treatment-related late Grade 2 or higher gastrointestinal or genitourinary toxicity occurring more than 90 days through 5 years after completion of radiotherapy. Late Grade 3 or higher gastrointestinal or genitourinary toxicity will be summarized separately. Clinically meaningful deterioration from baseline in urinary, bowel, and sexual patient-reported outcomes will be evaluated as a key safety and quality-of-life assessment.
Secondary assessments include PSA kinetics, biochemical relapse-free survival using the Phoenix definition, quality-of-life changes measured by EPIC, IPSS, and IIEF instruments, erectile and sexual function preservation, associations between clinical or dosimetric factors and outcomes, hormonal therapy exposure, and patterns of recurrence on clinically indicated imaging.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Lisbon, Portugal, 1400-038
- Champalimaud Foundation
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Beskrivelse
Inklusionskriterier:
- Underskrevet undersøgelsesspecifik informeret samtykkeformular;
- Histologisk bekræftelse af adenocarcinom i prostata ved biopsi;
- Tidligere hormonbehandling er tilladt (men ikke påkrævet);
- Ingen direkte tegn på regionale eller fjerne metastaser efter passende stadieundersøgelser;
- Alder ≥ 40;
- Performance Status 0-2;
- American Urological Association (AUA) score skal være ≤ 20 (alfablokkere tilladt);
- Computertomografi (CT) eller ultralydsbaseret volumenvurdering af prostata ≤ 150 gram.
Ekskluderingskriterier:
- Metastatisk sygdom fra prostatacancer på billeddiagnostiske undersøgelser MRI-bevis for radiografisk T3, T4;
- Tidligere bækkenstrålebehandling;
- Tidligere operation for prostatacancer;
- Tidligere hormonbehandling givet i mere end 6 måneder før behandling;
- Anamnese med Crohns sygdom eller colitis ulcerosa;
- Tidligere væsentlige obstruktive symptomer;
- Betydelig psykiatrisk sygdom;
- Alvorlig, aktiv komorbiditet som defineret i afsnit 3.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
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Eksperimentel: Experimental: Ultra-hypofractionated IGRT-VMAT 45 Gy in 5 fractions of 9 Gy
Participants will receive definitive dose-escalated image-guided volumetric modulated arc radiotherapy for localized prostate adenocarcinoma.
Radiotherapy will be delivered to 45 Gy in 5 fractions of 9 Gy each over 5 consecutive days, using organ-motion mitigation, urethral localization, online target tracking, urethral sparing, rectal balloon stabilization, and protocol-specified treatment planning and quality assurance procedures.
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En rektal ballon med luftfyldning vil blive brugt til immobilisering af prostatamål og anatomisk reproducerbarhed.
Et urinrørskateter fyldt med beacon-transpondere vil blive brugt til at sikre opsætningsreproducerbarhed og online målsporing.
Image-guided volumetric modulated arc radiotherapy delivered to 45 Gy in 5 fractions of 9 Gy each.
Treatment uses CT/MRI-based planning, a rectal balloon for target immobilization and anatomical reproducibility, a urethral catheter loaded with beacon transponders for localization and online tracking, and urethral dose sparing using inverse dose-painting when compatible with target coverage and disease anatomy.
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Acute treatment-related Grade ≥3 gastrointestinal or genitourinary toxicity
Tidsramme: From first protocol fraction through 90 days after completion of radiotherapy
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Incidence of treatment-related Grade 3 or higher gastrointestinal or genitourinary adverse events, graded using NCI CTCAE version 4.0.
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From first protocol fraction through 90 days after completion of radiotherapy
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Late treatment-related Grade ≥2 gastrointestinal or genitourinary toxicity
Tidsramme: More than 90 days through 60 months after completion of radiotherapy
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Incidence of treatment-related late Grade 2 or higher gastrointestinal or genitourinary adverse events, graded using NCI CTCAE version 4.0.
Late Grade 3 or higher toxicity will be summarized separately.
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More than 90 days through 60 months after completion of radiotherapy
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Change from baseline in urinary quality of life
Tidsramme: Baseline; approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Change in urinary symptoms and urinary quality-of-life domains using validated instruments including EPIC-26 and IPSS.
Change from baseline in EPIC-26 and IPSS, .
The EPIC-26 (Expanded Prostate Cancer Index Composite score) questionnaire ranges between 0 and 100, with higher values indicating better quality of life.
The IPSS (International Prostatic Symptoms Score) questionnaire ranges between 0 and 35 with higher values indicating worse urinary symptoms.
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Baseline; approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Change from baseline in bowel quality of life
Tidsramme: Baseline; approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Change in bowel/rectal patient-reported outcomes using EPIC bowel-domain assessments.
The EPIC-26 (Expanded Prostate Cancer Index Composite score) questionnaire ranges between 0 and 100, with higher values indicating better quality of life.
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Baseline; approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Change from baseline in sexual function
Tidsramme: Baseline; approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Change in sexual function and sexual quality of life using EPIC-26 sexual-domain and IIEF instruments.
The EPIC-26 (Expanded Prostate Cancer Index Composite score) questionnaire ranges between 0 and 100, with higher values indicating better quality of life.
The IIEF (International Index of Erectile Function) questionnaire ranges between 0 and 30 with higher scores indicating better sexual function.
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Baseline; approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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PSA kinetics after radiotherapy
Tidsramme: Approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Longitudinal serum PSA values after treatment, including PSA decline patterns and association with clinical outcomes.
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Approximately 1, 3, 6, 9, and 12 months; then every 6 months through 60 months
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Biochemical relapse-free survival
Tidsramme: Through 60 months or longer after completion of radiotherapy
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Time to biochemical relapse, assessed using the Phoenix definition.
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Through 60 months or longer after completion of radiotherapy
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Patterns of recurrence
Tidsramme: Through 60 months or longer after completion
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Local, nodal, or distant recurrence patterns summarized from clinically indicated imaging at or after biochemical relapse.
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Through 60 months or longer after completion
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Correlation of clinical and dosimetric variables with toxicity and quality-of-life outcomes (EPIC-26)
Tidsramme: Through 60 months after completion of radiotherapy
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Analysis of correlations between treatment-planning dose metrics, clinical factors, toxicity, and EPIC-26 patient-reported outcomes.
EPIC-26 (Expanded Prostate Cancer Index Composite score) questionnaire ranges between 0 and 100, with higher values indicating better quality of life.
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Through 60 months after completion of radiotherapy
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Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: Carlo Greco, MD, Fundação Champalimaud
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Anslået)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- HYPO
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
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