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Multi-peptide Vaccination and Bispecific PSMAxCD3 Antibody Treatment in Patients With Prostate Cancer (ImmProCure)

1. Oktober 2026 aktualisiert von: University Hospital Tuebingen

Randomized Phase II Study of Multi-peptide Vaccination and Bispecific PSMAxCD3 Antibody Treatment in Patients With Biochemical Relapse of Prostate Cancer

This trial is a phase II, randomized, open label study designed to evaluate safety, tolerability and efficacy of CC-1, a bispecific antibody (bsAb) with PSMAxCD3 specificity, and of VACXS15-PC01, a prostate cancer (PC)-specific multi-peptide vaccine, both administered as single agent or in combination to patients affected with biochemical recurrence (BCR) of PC after local therapy with curative intent. Patients will not receive other treatments during trial participation.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

CC-1 contains a PSMA binder with particular reactivity in PC and also binds to tumor vessels, thereby allowing for a dual mode of anti-cancer action. CC-1 was developed in a novel format which not only prolongs serum half-life, but most importantly reduces off-target T cell activation with expected fewer side effects. The multi-peptide vaccine VAC-XS15-PC01 is composed of 10 HLA-restricted antigens, comprising immunopeptidome-defined PC-associated epitopes, adjuvanted with the TLR1/2 ligand XS15 emulsified in Montanide ISA 51 VG.

The study entails three-arms: (1) the multi-peptide vaccine VAC-XS15-PC01 alone, (2) PSMAxCD3 bispecific antibody CC-1 alone and (3) combinatorial treatment of CC-1 and VAC-XS15-PC01. Up to 84 patients are recruited (n = up to 28 per arm) and patients are randomly assigned 1:1:1 (drop-out rate of 15% anticipated). A translational research program comprising, among others, a strict evaluation of prostate specific antigen (PSA) course integrated with analysis of CC-1 induced immune response and immunogenicity of VAC-XS15-PC01 serves to detect early signs of efficacy. Furthermore, safety of the investigational medical products is evaluated, and tolerability of their combination are assessed.

Studientyp

Interventionell

Einschreibung (Geschätzt)

84

Phase

  • Phase 2

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

    • Baden-Wurttemberg
      • Heidelberg, Baden-Wurttemberg, Deutschland, 69120
        • Noch keine Rekrutierung
        • NCT Studienzentrale; Nationales Centrum für Tumorerkrankungen (NCT) Heidelberg
        • Kontakt:
      • Tübingen, Baden-Wurttemberg, Deutschland, 72076
        • Rekrutierung
        • CCU Transltional Immunolgy, University Hospital Tübingen
        • Kontakt:
    • Beriln
      • Berlin, Beriln, Deutschland, 12203
        • Noch keine Rekrutierung
        • Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin - Studienzentrale Onkologie
        • Kontakt:
    • North Rhine-Westphalia
      • Essen, North Rhine-Westphalia, Deutschland, 45147
        • Noch keine Rekrutierung
        • Universitätsklinikum Essen, Abteilung Urologie
        • Kontakt:

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 80 Jahre (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Männlich

Beschreibung

Inclusion Criteria:

  • Understand and voluntarily sign an IC document prior to any study related assessments/procedures

    • Understand and voluntarily sign an IC document prior to any study related assessments/procedures

    • Patient is able to understand and comply with the protocol for the duration of the study including treatment and scheduled visits and examinations

    • Men aged ≥ 18 and ≤80 years

    • Histologic diagnosis of prostatic adenocarcinoma

    • Biochemical recurrence (BCR): PSA recurrence after treatment with curative intent; PSA ≥0.2 ng/mL or PSA > nadir + 2 ng/mL (after definitive RT), with two increasing PSA values prior to study treatment; AND no distant metastasis upon PSMA-PET imaging

    • Patients are ineligible to receive available treatment alternatives

    • Low risk of rapid disease progression, defined as:

      o PSA-DT > 1 year AND pathological ISUP grade < 4 for men with prior RP OR Interval to BCR > 18 months AND biopsy ISUP grade < 4 for men with prior radiation therapy

    • In case of second relapse PSA-DT > 9 months

    • Eastern Cooperative Oncology Group (ECOG) performance status ≤1

Exclusion Criteria:

  • • PSA >5 ng/mL (at screening)

    • Patients who are receiving or have previously received androgen deprivation treatment.

Except testosterone has recovered to normal levels: patients who have previously received anti-hormonal treatment testosterone must be >12 nmol/l.

  • Patients who are planned to or are undergoing salvage therapy (e.g. radiation)
  • Clinically significant xerostomia (dry mouth >1grade according to CTCAE v6.0)
  • Untreated current or prior distant metastasis of PC
  • Other malignancy within the last 2 years except: adequately treated non-melanoma skin cancer and non-muscle invasive bladder cancer.
  • Concurrent or previous treatment within 30 days in another interventional clinical trial with an investigational anti-cancer therapy
  • Clinical signs of active infection (> grade 2 according to CTCAE v6.0)
  • History of HIV infection
  • Viral active or chronic hepatitis (HBV or HCV)
  • Autoimmune disease that requires or has required treatment with systemic immunosuppressive treatments, except low dose corticosteroids (< 10 mg/ day), in the past 1 year
  • Ongoing relevant CNS pathology (e.g. seizure, paresis, aphasia, cerebrovascular ischemia, severe brain injuries, dementia, Parkinson's disease, cerebellar disease, organic brain syndrome, psychosis, coordination or movement disorder)
  • Epilepsy requiring pharmacologic treatment
  • Major surgery within 4 weeks of starting study treatment. Patients must have recovered from any effects of major surgery.
  • Heart failure NYHA III/IV
  • Severe obstructive or restrictive ventilation disorder
  • Known intolerance to CC-1, or other immunoglobulin drug products as well as hypersensitivity to any of the excipients present in the respective drug products (CC-1, VAC-XS15-PC01)
  • Refrain from blood donation during the course of the study
  • Male patients have to refrain from sperm donations for 6 months after last IMP

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Aktiver Komparator: Multi-peptide vaccine VAC-XS15-PC01

The vaccine VAC-XS15-PC01 consists of 300 µg of each of 10 PC-associated peptides. The vaccine cocktail (final volume 500 µL) will be administered subcutaneously (SC), adjuvanted with the TLR1/2 ligand XS15 (50 µg) and emulsified in Montanide ISA 51 VG at a 1:1 ratio. A total of three vaccinations are planned in Arm 1, administered 4 weeks apart from each other.

The vaccine VAC-XS15-PC01 consists of 300 µg of each of 10 PC-associated peptides. The vaccine cocktail (final volume 500 µL) will be administered subcutaneously (SC), adjuvanted with the TLR1/2 ligand XS15 (50 µg) and emulsified in Montanide ISA 51 VG at a 1:1 ratio. A total of three vaccinations are planned in Arm 1, administered 4 weeks apart from each other.

Aktiver Komparator: PSMAxCD3 bispecific antibody CC-1

CC-1 is applied subcutaneously once per week for 12 weeks in Arm 2. Due to priming doses up to 14 applications are planned.

CC-1 is applied subcutaneously once per week for 12 weeks in Arm 2. Due to priming doses up to 14 applications are planned.

Experimental: PSMAxCD3 bispecific antibody CC-1 + Multi-peptide vaccine VAC-XS15-PC01

The vaccine VAC-XS15-PC01 consists of 300 µg of each of 10 PC-associated peptides. The vaccine cocktail (final volume 500 µL) will be administered subcutaneously (SC), adjuvanted with the TLR1/2 ligand XS15 (50 µg) and emulsified in Montanide ISA 51 VG at a 1:1 ratio. A total of three vaccinations are planned in Arm 3, administered 4 weeks apart from each other.

CC-1 is applied subcutaneously once per week for 12 weeks in Arm 3. Due to priming doses up to 14 applications are planned.

The vaccine VAC-XS15-PC01 consists of 300 µg of each of 10 PC-associated peptides. The vaccine cocktail (final volume 500 µL) will be administered subcutaneously (SC), adjuvanted with the TLR1/2 ligand XS15 (50 µg) and emulsified in Montanide ISA 51 VG at a 1:1 ratio. A total of three vaccinations are planned in Arm 1, administered 4 weeks apart from each other.

CC-1 is applied subcutaneously once per week for 12 weeks in Arm 2. Due to priming doses up to 14 applications are planned.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
PSA response defined as ≥50% reduction in PSA at FU1 compared to baseline.
Zeitfenster: Screening: 21 days before Cycle (C1);C1: Day (D) -1, D0 to D3, D8, D15, and D22; C2-3: D1, D8, D15, and D22 (each cycle is 22 days); End of Treatment (EOT): D29 of C3; Follow-Up 1-5: every 30 days after the EOT; End of study (EOS): 12 months after EOT

PSA serum levels [ng/ml] are determined during screening, before every treatment, and then every 30 days until end of follow up. PSA serum levels for one study patient should be locally assessed in the same lab during the whole study treatment. Furthermore, 5ml serum are taken and should be processed locally and stored at -80 °C at the study site. Tübingen for central assessment of PSA.

Screening: 21 days before Cycle (C1);C1: Day (D) -1, D0 to D3, D8, D15, and D22; C2-3: D1, D8, D15, and D22 (each cycle is 22 days); End of Treatment (EOT): D29 of C3; Follow-Up 1-5: every 30 days after the EOT; End of study (EOS): 12 months after EOT

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

24. September 2026

Primärer Abschluss (Geschätzt)

31. März 2029

Studienabschluss (Geschätzt)

31. März 2030

Studienanmeldedaten

Zuerst eingereicht

24. September 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

1. Oktober 2026

Zuerst gepostet (Tatsächlich)

6. Oktober 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

6. Oktober 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

1. Oktober 2026

Zuletzt verifiziert

1. Oktober 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • ImmProCure
  • 2025 (US NIH Stipendium/Vertrag)
  • 2025-522144-41-00 (Ctis)

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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