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Impact of Body Composition on Dosimetry of 177Lu-PSMA Radioligand Therapy (COCORIVO)

11. maj 2026 opdateret af: Centre Henri Becquerel

Impact de la Composition Corporelle Sur la dosimétrie de la radiothérapie Interne vectorisée au 177Lu-PSMA

COCORIVO is an interventional study evaluating the impact of body composition on dosimetry of 177Lu-PSMA radioligand therapy in patients with metastatic castration-resistant prostate cancer (mCRPC). Body composition (muscle, lean, visceral fat, subcutaneous fat and total fat masses) will be automatically quantified from whole-body CT images acquired at 72-96h after 177Lu-PSMA injection using the Anthropometer3DNet software. Dosimetry will be evaluated for tumors and organs at risk (salivary glands, bone marrow, kidneys). The study also evaluates the impact of body composition on SUV quantification, the feasibility of single-timepoint dosimetry, and the evolution of body composition during treatment.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Prostate-specific membrane antigen (PSMA) is highly expressed in metastatic castration-resistant prostate cancer. 177Lu-PSMA-617 is a radioligand therapy delivering beta-particle radiation to PSMA-expressing cells. The VISION trial demonstrated significant improvement in progression-free and overall survival compared to standard of care.

Hypotheses: patients with higher fat mass may have better treatment response due to higher tumor dose; discordance between BMI-based and CT-based body composition measurements; SUV quantification in PET/CT and SPECT/CT depends on patient morphology; dosimetry of organs at risk depends on morphology; body composition changes during treatment; PSA kinetics are modified by dosimetry.

Study design: patients scheduled for 177Lu-PSMA treatment (4 or 6 cycles, 7400 MBq IV every 6 weeks) are enrolled. After cycle 1, SPECT/CT is performed at 72-96H (all patients) and additionally at 4-24H and 168-196H (40 patients for multipoint dosimetry). Body composition is extracted from the non-injected CT component of SPECT/CT using Anthropometer3DNet. Nutritional assessment (MNA questionnaire, blood tests including albumin, transthyretin, CRP, PSA) is performed at baseline (C1) and end of treatment (C4 or C6).

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

100

Fase

  • Ikke anvendelig

Kontakter og lokationer

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Studiekontakt

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Studiesteder

Deltagelseskriterier

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Berettigelseskriterier

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  • Ældre voksen

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Beskrivelse

Inclusion Criteria:

  • Signed informed consent
  • Male, age >= 18 years
  • Histologically confirmed prostatic adenocarcinoma with multidisciplinary decision for 177Lu-PSMA treatment
  • PSMA expression in tumor lesions confirmed by 68Ga-PSMA PET/CT
  • Affiliated to or beneficiary of a social security scheme

Exclusion Criteria:

  • Patient unable to understand the study or comply with study constraints (language barrier, psychological, geographic...)
  • Patient under legal protection (tutelle, curatelle, sauvegarde de justice)

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

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

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: COCORIVO
Patients with mCRPC treated with 177Lu-PSMA-617 undergoing additional SPECT/CT acquisitions and body composition analysis
Stråling: 177Lu-PSMA-617 + SPECT/CT dosimetry

177Lu-PSMA-617 7400 MBq IV, 4 to 6 cycles every 6 weeks (standard of care).

Additional interventions: whole-body SPECT/CT at 4-24H and/or 168-196H post-injection (research acquisitions) for dosimetry. Body composition analysis from SPECT/CT scanner using Anthropometer3DNet. MNA questionnaire and nutritional blood tests at baseline and end of treatment.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Tumor and organ-at-risk dosimetry as a function of body composition
Tidsramme: After cycle 1 of 177Lu-PSMA treatment (approximately week 1)
Dosimetry (Gy) of all tumors and organs at risk (salivary glands, bone marrow, kidneys) evaluated by SPECT/CT at 72-96H post-injection. Patients classified into two categories based on median body composition of the study population.
After cycle 1 of 177Lu-PSMA treatment (approximately week 1)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Comparison of SUV vs SUL in 68Ga-PSMA PET/CT and 177Lu-PSMA SPECT/CT
Tidsramme: Baseline and after cycle 1 (approximately week 1)
Comparison of SUV (normalized by total body mass) and SUL (normalized by lean body mass) of lesions and organs at risk. Difference <20% considered equivalent.
Baseline and after cycle 1 (approximately week 1)
Evaluate the differences between a single-point dosimetric approach based on population pharmacokinetics and a multi-point approach
Tidsramme: 196 hours after the injection of the first cycle of 177LuPSMA
Comparison of dosimetry
196 hours after the injection of the first cycle of 177LuPSMA

Samarbejdspartnere og efterforskere

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Sponsor

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 2028

Studieafslutning (Anslået)

1. juni 2029

Datoer for studieregistrering

Først indsendt

20. april 2026

Først indsendt, der opfyldte QC-kriterier

11. maj 2026

Først opslået (Faktiske)

14. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

14. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

11. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • CHB 25.05
  • 2025-A01010-49 (Anden identifikator: Ministry of Health)

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INGEN

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