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Evaluation of [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT for Predicting Pathological Complete Response After Neoadjuvant Chemotherapy in HER2 Positive Early Breast Cancer (GATHER)

12. maj 2026 opdateret af: Centre Henri Becquerel

Evaluation of [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT for Predicting Pathological Complete Response After Neoadjuvant Chemotherapy in HER2 Positive Early Breast Cancer (GATHER): a Study Protocol for a Monocentric, Prospective, Interventional, Phase 2, Imaging Biomarker Trial.

The GATHER trial aim to evaluate the diagnostic performance of [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT in predicting pCR following neoadjuvant chemotherapy. This study is part of the development of new functional, non-invasive approaches with the aim of offering personalized therapeutic approaches.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

In early-stage HER2-positive breast cancer, neoadjuvant chemotherapy is frequently required, and pathological complete response (pCR) correlates with excellent prognosis. However, no non-invasive imaging method reliably predicts pCR, making surgery mandatory despite its aesthetic, functional, and psychological burden. Recently, new functional imaging tracers targeting the HER2 protein have been developed. Among these, [68Ga]Ga-NOTA-anti-HER2-sdAb is of particular interest due to its molecular characteristic; it has demonstrated favorable safety profile and ability to identify HER2+ cells in vivo. This trial evaluates its ability to predict pCR, with the prospect of paving the way for future therapeutic de escalation and surgical sparing.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

42

Fase

  • Fase 2

Kontakter og lokationer

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

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

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

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Female aged 18 years or older
  • Histologically proven HER2-positive early breast cancer, defined as IHC 3+ or IHC 2+ with ISH amplification
  • Indication for neoadjuvant chemotherapy combined with anti-HER2 targeted therapy followed by surgery, as determined by a multidisciplinary tumor board
  • ECOG performance status of 0 or 1
  • Affiliated to or beneficiary of a social protection scheme
  • Written informed consent signed prior to any study-specific procedure

Exclusion Criteria:

  • Pregnant or breastfeeding women

    • Patient not treated with curative intent
    • History of ipsilateral breast cancer treated by surgery and/or radiotherapy
    • Lobular histology
    • Known contraindication or hypersensitivity to [68Ga]Ga-NOTA-anti-HER2-sdAb or any of its radiopharmaceutical excipients
    • Known contraindication or hypersensitivity to [18F]F-FDG or any of its radiopharmaceutical excipients
    • Concurrent enrollment in another clinical trial evaluating radiopharmaceuticals
    • Patient under guardianship, curatorship, or judicial protection
    • Patient deprived of liberty
    • Inability to understand the study or comply with trial constraints due to linguistic, psychological, or geographical barriers

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: [68Ga]Ga-NOTA-anti-HER2-sdAb Positron Emission Tomography
Patients will undergo an [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT before neoadjuvant chemotherapy and 15 days prior the scheduled surgery
Andet: [68Ga]Ga-NOTA-anti-HER2-sdAb Positron Emission Tomography
Patients will undergo an [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT before neoadjuvant chemotherapy and 15 days prior the scheduled surgery

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Concordance rate between the response estimated by [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT and the invasive pathological complete response
Tidsramme: 2 weeks after surgery
The concordance rate is defined as the proportion of patients correctly classified by the post-therapeutic PET/CT compared to the gold standard histopathological assessment (ypT0/is ypN0).
2 weeks after surgery

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Concordance rate between the response estimated by [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT and the pCR on both invasive and non-invasive components
Tidsramme: two weeks after surgery
The concordance rate is calculated as the proportion of correctly classified patients compared to the non-invasive pCR definition (ypT0 ypN0), in addition to the invasive definition (ypT0/is ypN0)
two weeks after surgery
Comparison of the diagnostic performance of [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT against other conventional imaging modalities in predicting the invasive pCR
Tidsramme: Two weeks after surgery
ΔSUV is defined as the relative change in SUVmax between the baseline and post-therapeutic [68Ga]Ga-NOTA-anti-HER2-sdAb PET/CT, compared according to invasive pathological complete response (ypT0/is ypN0).
Two weeks after surgery

Samarbejdspartnere og efterforskere

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

Sponsor

Centre Henri Becquerel

Efterforskere

  • Ledende efterforsker: Florian Clatot, MD, PhD, Centre Henri Becquerel

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. september 2026

Primær færdiggørelse (Anslået)

1. september 2027

Studieafslutning (Anslået)

1. marts 2028

Datoer for studieregistrering

Først indsendt

12. maj 2026

Først indsendt, der opfyldte QC-kriterier

12. maj 2026

Først opslået (Faktiske)

18. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

18. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

12. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • CHB25.04
  • 2025-523286-23-00 (Ctis)

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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