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A Study of Risvutatug Rezetecan in Participants With Metastatic Castration-resistant Prostate Cancer (mCRPC)

28. august 2026 oppdatert av: GlaxoSmithKline

A Phase 3 Randomized Study to Evaluate the Safety and Efficacy of Risvutatug Rezetecan, a B7-H3 Antibody Drug Conjugate (ADC) in Participants With Metastatic Castration-resistant Prostate Cancer (EMBOLD Prostate-302)

This study aims to evaluate how well risvutatug rezetecan (Ris-Rez) works in treating prostate cancer compared to best supportive/standard of care (BSC) which may include a hormone therapy with an androgen receptor pathway inhibitors (ARPI), by checking whether it makes cancers smaller or disappear completely, if it helps participants live longer, and/or feel better. The study is also assessing whether Ris-Rez is safe and tolerated well by participants and aims to provide a better understanding of the side effects of the drug.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

684

Fase

  • Fase 3

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studer Kontakt Backup

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

  • Voksen
  • Eldre voksen

Tar imot friske frivillige

Nei

Beskrivelse

Inclusion Criteria:

  • Participants ≥18 years of age
  • Has histologically or cytologically confirmed adenocarcinoma of the prostate.
  • Has an Eastern Cooperative Oncology Group (ECOG) PS of 0 or 1, with no deterioration in the 2 weeks before randomization.
  • Has a life expectancy of at least 4 months.
  • Has adequate organ function

Exclusion Criteria:

  • Pathological finding consistent with small cell, neuroendocrine carcinoma of the prostate, mixed histologies or any histology different from adenocarcinoma.
  • Participants with known mismatch repair deficient (dMMR)/MSI-H/TMB-H status and eligible for immune checkpoint inhibitor therapy,
  • Has a malignancy (except disease under study) that has progressed or required active treatment within the past 24 months except for basal cell or squamous cell carcinomas of the skin or in-situ carcinomas [e.g., breast, cervix] with no evidence of metastatic disease.
  • Has undergone major surgery, including local prostate intervention (except prostate biopsy), within 28 days before the date of randomization,
  • Has clinically significant bleeding symptoms or significant bleeding tendency within 1 month prior to the first dose.
  • Known active infectious diseases requiring systemic treatment or known human immunodeficiency virus (HIV)
  • Has untreated brain or central nervous system (CNS) metastases or brain/CNS metastases that have progressed
  • Has received systemic immunosuppressive agents within 30 days prior to first dose of study intervention (or requires long-term administration [30 days or longer]).
  • Has received any prior therapy with an ADC with a topoisomerase 1 inhibitor (TOPO1-inhibitor) payload

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Ingen (Open Label)

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Risvutatug rezetecan (Ris-Rez)
Participants will receive Risvutatug rezetecan (Ris-Rez).
Biologisk: Risvutatug rezetecan (Ris-Rez)
Risvutatug rezetecan (Ris-Rez) will be administered.
Aktiv komparator: Standard of Care
Participants will receive physician's choice of best supportive/standard of care (BSC), with or without androgen receptor pathway inhibitors (ARPI) Enzalutamide, Abiraterone (with Prednisone or Prednisolone).
Legemiddel: Abiraterone
Abirateron vil bli administrert.
Legemiddel: Enzalutamid
Enzalutamid vil bli administrert.
Legemiddel: Prednisone
Prednisone will be administered along with Abiraterone.
Legemiddel: Prednisolone
Prednisolone will be administered along with Abiraterone.

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Radiographic Progression-Free Survival (rPFS) per PCWG3 by BICR
Tidsramme: Up to approximately 169 weeks
rPFS is defined as time from randomization to the first documented radiographic disease progression, per Prostate cancer clinical trials working group 3 (PCWG3) as assessed by Blinded Independent Central Review (BICR) or death due to any cause, whichever occurs first.
Up to approximately 169 weeks
Overall Survival (OS)
Tidsramme: Up to approximately 169 weeks
OS is defined as the time from randomization to date of death by any cause.
Up to approximately 169 weeks

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Time to Pain Progression (TTPP)
Tidsramme: Up to approximately 169 weeks
Up to approximately 169 weeks
rPFS by Investigator assessment
Tidsramme: Up to approximately 169 weeks
rPFS is defined as time from randomization to the first documented radiographic disease progression per PCWG3 as assessed by Investigator or death due to any cause, whichever occurs first.
Up to approximately 169 weeks
Confirmed Objective Response Rate (cORR)
Tidsramme: Up to approximately 169 weeks
cORR is defined as the percentage of participants with a confirmed Complete Response (CR) or Partial Response (PR) per PCWG3 by BICR.
Up to approximately 169 weeks
Duration of Response (DoR)
Tidsramme: Up to approximately 169 weeks
DoR defined as the time from the date of first confirmed response (CR or PR) to the date of first documented PD per PCWG3 as assessed by BICR or death due to any cause, whichever comes first.
Up to approximately 169 weeks
Time to Prostate-specific antigen (PSA) progression
Tidsramme: Up to approximately 169 weeks
Time to PSA progression is defined as the time from randomization to PSA progression according to PCWG3 criteria.
Up to approximately 169 weeks
Prostate-specific antigen 50 (PSA50) response
Tidsramme: Up to approximately 169 weeks
PSA50 is defined as the proportion of participants having a ≥50% post-baseline PSA reduction from baseline with a consecutive confirmation assessment at least 3 weeks later.
Up to approximately 169 weeks
Time to first Symptomatic Skeletal-Related Event (SSRE)
Tidsramme: Up to approximately 169 weeks

Time to first SSRE is defined as the time from randomization to first occurrence of any of the following symptomatic skeletal-related events:

  • Use of EBRT to prevent or relieve skeletal symptoms .
  • New symptomatic pathological bone fracture (vertebral or non-vertebral).
  • New symptomatic spinal cord compression.
  • Tumor-related orthopedic surgical intervention
Up to approximately 169 weeks
Number of participants with adverse event (AEs), serious adverse event (SAEs), Adverse event of special interest (AESIs) by severity
Tidsramme: Up to approximately 169 weeks
Up to approximately 169 weeks
Number of participants with AEs leading to dose modifications or study intervention discontinuation
Tidsramme: Up to approximately 169 weeks
Up to approximately 169 weeks
Serum concentration of Ris-Rez (conjugated antibody and payload)
Tidsramme: Up to approximately 84 days
Up to approximately 84 days
Number of participants with Antidrug antibody (ADA) and Neutralizing Antibody (NAb) against Ris-Rez
Tidsramme: Up to approximately 169 weeks
Up to approximately 169 weeks
Titers of ADA against Ris-Rez
Tidsramme: Up to approximately 169 weeks
Up to approximately 169 weeks
Participant-reported experience on study treatment
Tidsramme: Up to approximately 169 weeks
Number of participants who reported their experience with study treatment using validated questionnaires will be measured
Up to approximately 169 weeks

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

GlaxoSmithKline

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

22. september 2026

Primær fullføring (Antatt)

19. desember 2029

Studiet fullført (Antatt)

19. desember 2029

Datoer for studieregistrering

Først innsendt

28. august 2026

Først innsendt som oppfylte QC-kriteriene

28. august 2026

Først lagt ut (Faktiske)

3. september 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

3. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

28. august 2026

Sist bekreftet

1. august 2026

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • 300145
  • 2026-525558-13-00 (Ctis)

Plan for individuelle deltakerdata (IPD)

Planlegger du å dele individuelle deltakerdata (IPD)?

JA

IPD-planbeskrivelse

Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/gsk-patient-level-data-sharing-july2025.pdf

IPD-delingstidsramme

Anonymized IPD will be made available within 6 months of publication of primary, key secondary and safety results for studies in product with approved indication(s) or asset(s) with development terminated across all indications.

Tilgangskriterier for IPD-deling

Anonymized IPD is shared with researchers whose proposals are approved by an Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months, but an extension may be granted, when justified, for up to 6 months.

IPD-deling Støtteinformasjonstype

  • STUDY_PROTOCOL
  • SEVJE
  • ICF
  • CSR

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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