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Two Part (Phase1b/ Phase3) Trial of Subcutaneous Dostarlimab Plus Carboplatin-Paclitaxel in Participants With Primary Advanced or Recurrent Endometrial Cancer (SAPPHIRE)

14. oktober 2026 opdateret af: GlaxoSmithKline

An Open-label, Multicenter, 2-Part Study: A Phase 1b Dose Selection Followed by a Randomized Phase 3 to Evaluate the Pharmacokinetics, Efficacy, and Safety of Subcutaneous Dostarlimab Plus Carboplatin-Paclitaxel Versus Intravenous Dostarlimab Plus Carboplatin-Paclitaxel in Participants With Primary Advanced or Recurrent Endometrial Cancer (SAPPHIRE)

This is an open-label study, meaning both the researchers and participants will know which treatment is being given.

The study has two parts. In Part 1, researchers will identify the most suitable SC dose. In Part 2, participants will be randomly assigned by chance to receive dostarlimab as either an SC injection or an IV infusion. All participants will also receive carboplatin and paclitaxel. Treatment may continue for up to 3 years, with participants closely monitored throughout the study.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

378

Fase

  • Fase 3

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Kvinde

Beskrivelse

Inclusion Criteria:

  • Participant is at least 18 years of age (or the legal age of consent in the jurisdiction in which the trial is taking place) at the time of signing the Informed Consent Form (ICF).
  • Participant has primary Stage III or Stage IV disease or first recurrent EC.
  • Participant must have a documented Mismatch repair (MMR)/Microsatellite Instability (MSI) status.
  • Participant is capable of giving signed informed consent, including compliance with the requirements and restrictions listed in the ICF and in the protocol.
  • Participant has an Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2 for Part 1 and an ECOG performance status of 0 or 1 for Part 2.
  • Participant has adequate organ function.

Exclusion Criteria:

  • Participant has history of or active autoimmune disease that has required systemic treatments within the 2 years prior to screening.
  • Participant has a history of severe allergic and/or anaphylactic reactions to chimeric, human or humanized antibodies, fusion proteins, or known hypersensitivity to carboplatin, paclitaxel or dostarlimab components or excipients.
  • Participant has received prior therapy with anti-programmed death protein 1 (PD-1), anti-programmed cell death ligand 1 (PD-L1), or anti-PD-L2 agent.
  • Participant has known uncontrolled brain or central nervous system (CNS) metastases.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Sekventiel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Part 1 (Phase 1b) SC dostarlimab and IV dostarlimab

Participants will receive SC dostarlimab in Cohorts 1, 2, 4, 5 and 6, at different doses, to determine the doses of SC dostarlimab that will yield drug exposures comparable to approved IV dosing regimens. Participants in Cohort 3 will receive IV dostarlimab. Participants in all cohorts will receive carboplatin and paclitaxel. After 6 cycles, all participants will receive IV dostarlimab for up to 3 years until progression, death, or intolerable toxicities.

Dostarlimab will be administered as SC injection and IV infusion

Carboplatin and paclitaxel will be administered as an IV infusion

Eksperimentel: Part 2 (Phase 3): SC dostarlimab (experimental) or IV dostarlimab (standard of care)

Eligible participants will be randomly assigned to receive either SC dostarlimab or IV dostarlimab (standard of care arm) in a 1:1 ratio. Participants randomized to the experimental arm will receive SC dostarlimab in combination with carboplatin and paclitaxel for 6 cycles, followed by SC dostarlimab monotherapy for up to 3 years of treatment in total. Participants randomized to the standard of care arm will receive IV dostarlimab in combination with carboplatin and paclitaxel for 6 cycles, followed by IV dostarlimab monotherapy for up to 3 years of treatment in total.

Dostarlimab will be administered as SC injection and IV infusion

Carboplatin and paclitaxel will be administered as an IV infusion

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Part 1: Serum Trough Concentration (Ctrough) After First Dose of Dostarlimab
Tidsramme: Up to 42 days
Up to 42 days
Part 1: Area Under the Concentration-time Curve (AUC) of Dostarlimab
Tidsramme: Up to 42 days
Up to 42 days
Part 2: Observed Ctrough of Dostarlimab
Tidsramme: Up to 168 days
Up to 168 days
Part 2: Model-predicted (MP) AUC of Dostarlimab
Tidsramme: Up to 21 days
Up to 21 days
Part 2: MP AUC of Dostarlimab
Tidsramme: Up to 168 days
Up to 168 days

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Part 1: Ctrough of Dostarlimab
Tidsramme: Up to 42 days
Up to 42 days
Part 1: AUC of Dostarlimab
Tidsramme: Up to 42 days
Up to 42 days
Part 1: Maximum Observed Concentration (Cmax) of Dostarlimab
Tidsramme: Up to 42 days
Up to 42 days
Part 1: Time to Peak Drug Concentration (Tmax) of Dostarlimab
Tidsramme: Up to 42 days
Up to 42 days
Parts 1 and 2: Number of Participants Experiencing Adverse Events (AEs), Serious AEs (SAEs), Treatment-emergent AEs (TEAEs) and Immune-mediated AEs (imAEs)
Tidsramme: Up to 39 months
Up to 39 months
Parts 1 and 2: Number of Participants with TEAEs Leading to Infusion or Injection Interruption, Dose Modifications, Trial Intervention Discontinuation, or Death
Tidsramme: Up to 39 months
Up to 39 months
Parts 1 and 2: Confirmed Overall Response Rate (ORR)
Tidsramme: Up to 3 years

Confirmed ORR is defined as the percentage of participants reaching confirmed complete response (CR) or confirmed partial response (PR) per RECIST 1.1 by blinded independent central review (BICR) and investigator assessment

Up to 3 years
Parts 1 and 2: Duration of Response (DoR)
Tidsramme: Up to 3 years

DoR per RECIST 1.1 by BICR and investigator assessment is defined as the time from the date of first documented objective response of CR or PR that is subsequently confirmed until the date of first documented progressive disease (PD) or death due to any cause, whichever comes first

Up to 3 years
Parts 1 and 2: Progression-free Survival (PFS)
Tidsramme: Up to 3 years

PFS is defined as the time from the date of randomization to the date of first documented objective tumor progression per RECIST 1.1 by BICR and investigator assessment or death due to any cause, whichever comes first

Up to 3 years
Parts 1 and 2: Overall Survival (OS)
Tidsramme: Up to 3 years

OS is defined as the time from the date of randomization to the date of death due to any cause

Up to 3 years
Part 1: Number of Participants with Antidrug Antibody (ADAs) against Dostarlimab
Tidsramme: Up to 39 months
Up to 39 months
Part 2: Number of Participants with ADAs against Dostarlimab
Tidsramme: Up to 3 years
Up to 3 years
Part 2: MP Ctrough of Dostarlimab
Tidsramme: Up to 168 days
Up to 168 days
Part 2: MP Ctrough at Steady State of Dostarlimab
Tidsramme: Up to 168 days
Up to 168 days
Part 2: MP AUC at Steady State of Dostarlimab
Tidsramme: Up to 168 days
Up to 168 days
Part 2: MP Cmax of Dostarlimab
Tidsramme: Up to 168 days
Up to 168 days

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Studieleder: GSK Clinical Trials, GlaxoSmithKline

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

12. november 2026

Primær færdiggørelse (Anslået)

5. november 2030

Studieafslutning (Anslået)

5. november 2032

Datoer for studieregistrering

Først indsendt

30. september 2026

Først indsendt, der opfyldte QC-kriterier

30. september 2026

Først opslået (Faktiske)

6. oktober 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. oktober 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

14. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 300118
  • 2025 (U.S. NIH-bevilling/kontrakt)
  • 2025-525060-15-00 (Ctis)
  • EN-35 (Anden identifikator: ENGOT Number)
  • GOG-3125 (Anden identifikator: GOG Number)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (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 terminated asset(s) across all indications.

IPD-delingsadgangskriterier

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 Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .