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A Study of a Medicine Called Atirmociclib in Combination With Giredestrant in Adult Participants With ER-positive, HER2-negative Early-stage Breast Cancer

5. november 2026 opdateret af: Pfizer

AN INTERVENTIONAL, DOUBLE-BLIND, PLACEBO CONTROLLED, RANDOMIZED, MULTICENTER PHASE 3 STUDY OF ATIRMOCICLIB (PF-07220060) PLUS GIREDESTRANT COMPARED TO GIREDESTRANT MONOTHERAPY AS ADJUVANT TREATMENT IN ADULT PARTICIPANTS WITH ESTROGEN RECEPTOR (ER)-POSITIVE, HER2-NEGATIVE EARLY-STAGE BREAST CANCER WITH MEDIUM OR HIGH RISK OF RECURRENCE (FOURLIGHT-4)

This Phase 3 study will evaluate whether atirmociclib plus giredestrant improves invasive breast cancer-free survival compared with giredestrant alone in adults with ER-positive, HER2-negative early breast cancer at medium or high risk of recurrence.

This is a Phase 3, double blind, placebo controlled study of atirmociclib plus giredestrant vs. giredestrant monotherapy as adjuvant treatment in adult patients with ER+, HER2- early breast cancer. The study plans to enroll 3800 participants randomized 1:1 into one of two treatment arms (Arm A - investigational: atirmociclib plus giredestrant taken continuously in a 28-day cycle) or (Arm B - comparator: placebo plus giredestrant taken continuously in a 28-day cycle). Participants may be treated with atirmociclib/placebo up to 3 years and giredestrant up to 5 years followed by long term follow up for survival and evaluation of recurrence of disease.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

3800

Fase

  • Fase 3

Kontakter og lokationer

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

Studiekontakt

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

Alle

Beskrivelse

KEY INCLUSION CRITERIA

  1. Histologically confirmed unilateral primary adenocarcinoma of the breast

    • ER-positive by local assessment
    • documented HER2-negative
  2. Node positive or node negative as defined by:

    • Pathological node positive (microscopic and/or macroscopic tumor involvement >/=pN1)

    • pN0 and pT >1cm with at least one of the following:

      1. pT4N0 or
      2. histologically Grade 3 disease or
      3. high-risk classification based on genomic assay
  3. Randomization within 16 months of definitive breast surgery

  4. If indicated, completed adjuvant and/or neoadjuvant chemotherapy, adjuvant radiation therapy >/= 21 days prior to randomization

KEY EXCLUSION CRITERIA

  1. Distant metastases of breast cancer beyond regional lymph nodes

  2. Multicentric or multifocal breast cancer if any tumor foci meet pathologic criteria for ER(-) or HER2(+)

  3. Clinically significant cardiovascular disease or cardiac repolarization abnormality for 6 months prior to randomization; resting heart rate <50bpm

  4. Has received the following prior systemic anti-cancer therapy for breast cancer

    • prior atirmociclib, giredestrant, other investigational anti-cancer agent
    • prior treatment with olaparib

    NOTES:

    • short course of prior neo/adjuvant CDK4/6 inhibitor treatment (</=8 weeks) is permitted; 10-day washout period required
    • short course of prior neoadjuvant and/or adjuvant ET (</=18 weeks) is permitted; 35-day washout period for tamoxifen is required
  5. Prior treatment with investigational product within 30 days or 5 half-lives

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: Parallel tildeling
  • Maskning: Firedobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Arm A : Atirmociclib + giredestrant

Atirmociclib tablet given orally twice daily, plus giredestrant capsule given orally once per day

Atirmociclib tablet given orally twice daily, plus giredestrant capsule given orally once per day

Andre navne:
  • PF-07220060

giredestrant capsule given once a day

Aktiv komparator: Arm B: Placebo for atirmociclib + giredestrant

Placebo atirmociclib tablets given orally twice a day plus giredestrant capsule given once a day

giredestrant capsule given once a day

Atirmociclib placebo tablet given twice a day

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Invasive Breast Cancer Free Survival (iBCFS)
Tidsramme: From randomization to first iBCFS event, up to 16 years

iBCFS is defined as the time from the date of randomization to the date of first documented occurrence of invasive ipsilateral breast tumor recurrence, local-regional invasive breast cancer recurrence, invasive contralateral breast cancer, distant recurrence, or death from any cause, as determined by investigator assessment per STEEP v2.0 criteria

From randomization to first iBCFS event, up to 16 years

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Invasive Disease Free Survival (iDFS)
Tidsramme: From randomization to first iDCFS event, up to 16 years

iDFS defined as the time from the date of randomization to the date of first documented occurrence of invasive ipsilateral breast tumor recurrence, local-regional invasive breast cancer recurrence, invasive contralateral breast cancer, distant recurrence, second primary invasive non-breast cancer, or death from any cause, as determined by investigator assessment per STEEP v2.0 criteria

From randomization to first iDCFS event, up to 16 years
Disease Recurrence Free Survival (DRFS)
Tidsramme: From randomization to first DRFS event, up to 16 years

DRFS as per investigator assessment, defined as the time from the date of randomization to the date of distant recurrence as determined by investigator assessment or death from any cause, whichever occurs first

From randomization to first DRFS event, up to 16 years
Overall survival (OS)
Tidsramme: From randomization to death from any cause, up to 16 years

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

From randomization to death from any cause, up to 16 years
Number and percentage of Participants with Treatment-Emergent Adverse Events (AEs)
Tidsramme: From start of treatment until 28 days after last dose of study treatment, up to 5 years

Type, incidence, severity of AE graded by NCI CTCAE v 5.0, seriousness and relationship to study intervention

From start of treatment until 28 days after last dose of study treatment, up to 5 years
Percentage of participants With Clinical Laboratory Abnormalities
Tidsramme: From start of treatment until 28 days after last dose of study treatment, up to 5 years
From start of treatment until 28 days after last dose of study treatment, up to 5 years
Percentage of Participants With ECG abnormalities
Tidsramme: From start of treatment until 28 days after last dose of study treatment, up to 5 years
From start of treatment until 28 days after last dose of study treatment, up to 5 years
Patient Reported Outcomes (PRO)
Tidsramme: From start of treatment until 28 days after last dose of study treatment, up to 5 years

Change from baseline in participant reported total score, well-being subscales and symptoms scores and TOI per FACT-ES

From start of treatment until 28 days after last dose of study treatment, up to 5 years
Pre-dose Plasma Concentration (Ctrough) of atirmociclib
Tidsramme: Cycle 1 Day 15, Cycle 2 Day 1, and Cycle 3 Day 1; Cycle is defined as 28 days
Cycle 1 Day 15, Cycle 2 Day 1, and Cycle 3 Day 1; Cycle is defined as 28 days

Samarbejdspartnere og efterforskere

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

Sponsor

Efterforskere

  • Studieleder: Pfizer CT.gov Call Center, Pfizer

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

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)

1. december 2026

Primær færdiggørelse (Anslået)

13. april 2032

Studieafslutning (Anslået)

20. august 2042

Datoer for studieregistrering

Først indsendt

16. oktober 2026

Først indsendt, der opfyldte QC-kriterier

16. oktober 2026

Først opslået (Faktiske)

22. oktober 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

10. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

5. november 2026

Sidst verificeret

1. november 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • C4391026

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

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 .