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Sicherheit und Wirksamkeit von Therapien bei metastasiertem kastrationsresistentem Prostatakrebs (mCRPC)

4. August 2026 aktualisiert von: Amgen

Ein Master-Protokoll zur Bewertung der Sicherheit und Wirksamkeit von Therapien bei metastasiertem kastrationsresistentem Prostatakrebs (mCRPC)

Dies ist ein Masterprotokoll zur Bewertung der Sicherheit und Wirksamkeit von Prüftherapien bei Teilnehmern mit metastasiertem kastrationsresistentem Prostatakrebs (mCRPC).

Studienübersicht

Status

Beendet

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Dies ist ein Masterprotokoll zur Bewertung der Sicherheit, Verträglichkeit und maximal tolerierten Dosis (MTD) oder empfohlenen Phase-2-Dosis (RP2D) und Wirksamkeit von Acapatamab in Kombination mit Enzalutamid, Abirateron oder dem PD1-Inhibitor AMG 404, AMG 404-Monotherapie sowie Acapatamab-Monotherapie bei Teilnehmern mit metastasiertem kastrationsresistentem Prostatakrebs (mCRPC).

Studientyp

Interventionell

Einschreibung (Tatsächlich)

55

Phase

  • Phase 2
  • Phase 1

Kontakte und Standorte

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

Studienorte

    • New South Wales
      • Darlinghurst, New South Wales, Australien, 2010
        • St Vincents Hospital Sydney
      • København Ø, Dänemark, 2100
        • Rigshospitalet
      • Lund, Schweden, 221 85
        • Skånes universitetssjukhus
      • Stockholm, Schweden, 171 76
        • Karolinska Universitetssjukhuset Solna
      • Uppsala, Schweden, 75185
        • Akademiska Sjukhuset
    • Navarre
      • Pamplona, Navarre, Spanien, 31008
        • Clinica Universidad de Navarra
    • Alabama
      • Birmingham, Alabama, Vereinigte Staaten, 35294
        • University of Alabama at Birmingham
    • California
      • Orange, California, Vereinigte Staaten, 92868
        • University of California at Irvine Medical Center
      • San Francisco, California, Vereinigte Staaten, 94158
        • University of California San Francisco Mission Bay Campus
    • Illinois
      • Chicago, Illinois, Vereinigte Staaten, 60637
        • University of Chicago
    • Kentucky
      • Louisville, Kentucky, Vereinigte Staaten, 40207
        • Norton Cancer Institute
    • Texas
      • Dallas, Texas, Vereinigte Staaten, 75390
        • University of Texas Southwestern Medical Center
      • Houston, Texas, Vereinigte Staaten, 77030
        • University of Texas MD Anderson Cancer Center
      • Sutton, Vereinigtes Königreich, SM2 5PT
        • Royal Marsden Hospital

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 99 Jahre (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Beschreibung

Alle Teile

Einschlusskriterien:

  • ≥ 18 Jahre (oder gesetzliches Erwachsenenalter im Land)
  • Der Proband hat vor Beginn jeglicher studienspezifischer Aktivitäten/Verfahren seine Einverständniserklärung abgegeben
  • Patienten mit mCRPC mit histologisch oder zytologisch bestätigtem Adenokarzinom der Prostata
  • Die Probanden sollten sich einer bilateralen Orchiektomie unterzogen haben oder sich einer kontinuierlichen Androgenentzugstherapie mit einem Gonadotropin-Releasing-Hormon-Agonisten oder -Antagonisten (Testosteron ≤ 50 ng/dl (oder 1,7 nmol/l)) unterziehen.

Ausschlusskriterien:

  • Metastasen des Zentralnervensystems (ZNS) oder leptomeningeale Erkrankung
  • Vorgeschichte oder Vorhandensein einer klinisch relevanten ZNS-Pathologie
  • Bestätigte Vorgeschichte oder aktuelle Autoimmunerkrankung oder andere Erkrankungen, die eine dauerhafte immunsuppressive Therapie erfordern
  • Myokardinfarkt, unkontrollierter Bluthochdruck, instabile Angina pectoris, medikamentöse Herzrhythmusstörungen und/oder symptomatische kongestive Herzinsuffizienz (New York Heart Association > Klasse II) innerhalb von 12 Monaten
  • Vorbehandlung mit einem Taxan bei mCRPC
  • Größere Operation und/oder Bestrahlung innerhalb von 4 Wochen
  • Vorgeschichte oder Anzeichen einer Infektion mit dem schweren akuten respiratorischen Syndrom Coronavirus 2 (SARS-CoV-2), es sei denn, dies wurde mit einem medizinischen Monitor vereinbart und erfüllt die folgenden Kriterien:

    • Negativer Test auf SARS-CoV-2-RNA durch Echtzeit-Polymerase-Kettenreaktion (RT-PCR) innerhalb von 72 Stunden nach der ersten Dosis von Acapatamab (oder AMG 404 in Teil 3)
    • Keine akuten Symptome einer COVID-19-Erkrankung innerhalb von 10 Tagen vor der ersten Dosis von Acapatamab (oder AMG 404 in Teil 3) (gezählt ab dem Tag des positiven Tests bei asymptomatischen Probanden)

Vorherige/gleichzeitige klinische Studienerfahrung

  • Gegenwärtig Behandlung in einem anderen Prüfgerät oder einer anderen Arzneimittelstudie oder weniger als 4 Wochen seit Beendigung der Behandlung mit einem anderen Prüfgerät oder einer anderen Arzneimittelstudie(n). Andere Untersuchungsverfahren während der Teilnahme an dieser Studie sind mit Ausnahme von Untersuchungsscans ausgeschlossen.

Nur Unterprotokoll A:

Einschlusskriterien

• Probanden, die planen, zum ersten Mal Enzalutamid für mCRPC zu erhalten

Ausschlusskriterien

  • Anwendung starker CYP2C8-Hemmer oder starker CYP3A4-Induktoren
  • Verwendung von Arzneimitteln mit geringer therapeutischer Breite, die Substrate von CYP3A4, CYP2C9 oder CYP2C19 sind

Nur Unterprotokoll B:

Einschlusskriterien

  • Probanden, die planen, Abirateron zum ersten Mal für mCRPC-Ausschlusskriterien zu erhalten
  • Moderate und schwere Leberfunktionsstörung (Child-Pugh-Klassen B und C) zu Studienbeginn
  • Vorhandensein von unkontrolliertem Bluthochdruck, Hypokaliämie oder Flüssigkeitsretention
  • Vorgeschichte oder Vorhandensein einer Nebennierenrindeninsuffizienz
  • Verwendung von Begleitmedikationen, die sensitive Substrate für CYP2D6 mit einer engen therapeutischen Breite sind
  • Verwendung starker CYP3A4-Induktoren

Nur Unterprotokoll C:

Einschlusskriterien

  • Probanden, die gegenüber einer neuartigen Antiandrogentherapie refraktär sind. Die Probanden müssen für eine Taxantherapie ungeeignet sein oder diese ablehnen.
  • Anzeichen einer fortschreitenden Erkrankung, definiert als 1 oder mehrere PCWG3-Kriterien: PSA-Wert >/= 1 ng/ml, der bei mindestens 2 aufeinanderfolgenden Gelegenheiten im Abstand von mindestens 1 Woche angestiegen ist, nodale oder viszerale Progression gemäß Definition von RECIST 1.1 mit PCGW3-Modifikationen, und/oder Auftreten von 2 oder mehr neuen Läsionen im Knochenscan Ausschlusskriterien
  • Vorgeschichte oder Anzeichen einer interstitiellen Lungenerkrankung oder aktiver, nicht infektiöser Pneumonitis
  • Patienten mit einem früheren PD-1- oder PD-L1-Inhibitor, bei denen vor dem ersten Tag der Dosis ein immunvermitteltes unerwünschtes Ereignis vom Grad 3 oder höher auftrat

Nur Unterprotokoll D:

Einschlusskriterien

  • Die Probanden hatten möglicherweise neuartige Hormontherapien (NHT; z. B. Abirateron, Enzalutamid, Apalutamid oder Darolutamid) für Prostatakrebs, aber nicht mehr als 1 NHT für metastasierenden Prostatakrebs
  • Ungeeignet für oder Ablehnung einer Taxantherapie

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: Sequenzielle Zuweisung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Acapatamab und Enzalutamid: Dosiserkundung
Der Dosisexplorationsteil der Studie wird die MTD/empfohlene Phase-2-Dosis (RP2D) von Acapatamab in Kombination mit Enzalutamid abschätzen.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
Enzalutamid wird oral verabreicht.
Andere Namen:
  • Androgenrezeptor-Hemmer
Experimental: Acapatamab und Enzalutamid: Dosiserweiterung
Nach der Dosiserkundung wird eine Dosiserweiterung durchgeführt, um die Sicherheit und Verträglichkeit der ausgewählten Dosis zu bestätigen und die Wirksamkeit von Acapatamab in Kombination mit Enzalutamid weiter zu bewerten.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
Enzalutamid wird oral verabreicht.
Andere Namen:
  • Androgenrezeptor-Hemmer
Experimental: Acapatamab und Abirateron: Dosiserkundung
Der Dosisexplorationsteil der Studie wird die MTD/empfohlene Phase-2-Dosis (RP2D) von Acapatamab in Kombination mit Abirateron abschätzen.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
Abirateron wird oral verabreicht.
Andere Namen:
  • Cytochrom P450 (CYP)17-Inhibitor
Experimental: Acapatamab und Abirateron: Dosiserweiterung
Nach der Dosiserkundung wird eine Dosiserweiterung durchgeführt, um die Sicherheit und Verträglichkeit der ausgewählten Dosis zu bestätigen und die Wirksamkeit von Acapatamab in Kombination mit Abirateron weiter zu bewerten.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
Abirateron wird oral verabreicht.
Andere Namen:
  • Cytochrom P450 (CYP)17-Inhibitor
Experimental: Acapatamab und AMG 404: Dosiserkundung
Der Dosisexplorationsteil der Studie wird die MTD/RP2D von Acapatamab in Kombination mit AMG 404 abschätzen.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
AMG 404 wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PD-1-Hemmer
Experimental: Acapatamab und AMG 404: Dosiserweiterung
Nach der Dosiserkundung wird eine Dosiserweiterung durchgeführt, um die Sicherheit und Verträglichkeit der ausgewählten Dosis zu bestätigen und die Wirksamkeit von Acapatamab in Kombination mit AMG 404 weiter zu bewerten.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
AMG 404 wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PD-1-Hemmer
Aktiver Komparator: AMG 404 Monotherapie
Eine AMG 404-Monotherapie wird durchgeführt, um die vorläufige Antitumoraktivität der PD-1-Hemmung in der mCRPC-Population zu bewerten.
AMG 404 wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PD-1-Hemmer
Experimental: Acapatamab und Enzalutamid: Kohorte zur Dosiserweiterung in Asien
Nach der Dosiserkundung wird in der asiatischen Kohorte eine Dosiserweiterung mit der Kombination MTD/RP2D durchgeführt, die in der Dosiserkundung bestimmt wurde, um die Sicherheit, Verträglichkeit und PK von Acapatamab in Kombination mit Enzalutamid für Studienteilnehmer in Asien zu bestätigen.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
Enzalutamid wird oral verabreicht.
Andere Namen:
  • Androgenrezeptor-Hemmer
Experimental: Acapatamab und Abirateron: Kohorte zur Dosiserweiterung in Asien
Nach der Dosiserkundung wird in der asiatischen Kohorte eine Dosiserweiterung mit der Kombination MTD/RP2D durchgeführt, die in der Dosiserkundung bestimmt wurde, um die Sicherheit, Verträglichkeit und PK von Acapatamab in Kombination mit Abirateron für Studienteilnehmer in Asien zu bestätigen.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
Abirateron wird oral verabreicht.
Andere Namen:
  • Cytochrom P450 (CYP)17-Inhibitor
Experimental: Acapatamab und AMG 404: Kohorte zur Dosiserweiterung in Asien
Nach der Dosiserkundung wird in der asiatischen Kohorte eine Dosiserweiterung mit der Kombination MTD/RP2D durchgeführt, die in der Dosiserkundung bestimmt wurde, um die Sicherheit, Verträglichkeit und PK von Acapatamab in Kombination mit AMG 404 für Probanden in Asien zu bestätigen.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie
AMG 404 wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PD-1-Hemmer
Experimental: Acapatamab-Monotherapie
Die Acapatamab-Monotherapie wird durchgeführt, um die Sicherheit, Verträglichkeit, Pharmakokinetik (PK), Pharmakodynamik und Wirksamkeit von Acapatamab bei Patienten mit mCRPC zu bewerten.
Acapatamab wird als intravenöse (IV) Infusion verabreicht.
Andere Namen:
  • PSMA-zielgerichtete Therapie

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Subprotocols A, B and C (Parts 1 and 2): Number of Participants Who Experienced a Dose-limiting Toxicity (DLT)
Zeitfenster: Cycle 1: Day 1 to Day 28 (28-day cycle)

DLTs were defined as any adverse event (AE) (per Common Terminology Criteria for Adverse Events (CTCAE) v5: Grade 5=Death, Grade 4=Life-threatening, Grade 3=Moderate) occurring within 28 days of the first AMG 160 dose, possibly related to the treatment, including:

  • Grade 5 toxicity
  • Grade 4 thrombocytopenia
  • Grade 3 thrombocytopenia with significant hemorrhage
  • Grade 4 neutropenia > 5 days
  • Febrile neutropenia
  • Grade 3 anemia requiring transfusion
  • Grade ≥3 non-hematologic toxicity (with exceptions per protocol)
  • Aspartate transaminase/alanine transaminase >3x upper limit of normal (ULN) with serum total bilirubin >2x ULN without cholestasis or another clear cause
  • Grade ≥3 non-hematological toxicity delaying treatment > 2 weeks or resulting in <75% dose administration.

The complete list of DLTs are described in the protocol

Cycle 1: Day 1 to Day 28 (28-day cycle)
Subprotocols A, B and C (Parts 1 and 2): Number of Participants Who Experienced Treatment-emergent Adverse Events (TEAEs) and Treatment-related AEs
Zeitfenster: From first dose of acapatamab/AMG 404 to the first of 30 days after last dose of acapatamab/AMG404, end of trial date or the initiation of a new anticancer therapy; median (min, max) duration was 4.665 (0.33, 25.17) months

A TEAE was defined as any untoward medical occurrence in a clinical trial participant irrespective of a causal relationship with the trial treatment that started on or after first dose of investigational product (AMG 160 or AMG 404 for Part 1 and 2; AMG 404 for Part 3).

A treatment-related TEAE was defined as a TEAE that had a reasonable possibility of being caused by acapatamab, or AMG 404 (subprotocol C, parts 1 and 2 only).

Clinically significant changes from baseline in vital signs and clinical laboratory tests were also recorded as TEAEs.

From first dose of acapatamab/AMG 404 to the first of 30 days after last dose of acapatamab/AMG404, end of trial date or the initiation of a new anticancer therapy; median (min, max) duration was 4.665 (0.33, 25.17) months
Subprotocol D: Number of Participants Who Experienced TEAEs and Treatment-related AEs
Zeitfenster: From first dose of acapatamab to the first of 30 days after last dose of acapatamab, end of trial date or the initiation of a new anticancer therapy, whichever is earlier; median (min, max) duration was 4.665 (0.33, 25.17) months

A TEAE was defined as any untoward medical occurrence in a clinical trial participant irrespective of a causal relationship with the trial treatment that started after the first dose of acapatamab.

A treatment-related TEAE was defined as a TEAE that had a reasonable possibility of being caused by acapatamab.

Clinically significant changes from baseline in vital signs and clinical laboratory tests were also recorded as TEAEs.

From first dose of acapatamab to the first of 30 days after last dose of acapatamab, end of trial date or the initiation of a new anticancer therapy, whichever is earlier; median (min, max) duration was 4.665 (0.33, 25.17) months
Subprotocol C, Part 3: Objective Response Rate (ORR)
Zeitfenster: From Cycle 1 Day 1 until progression, start of new anticancer therapy, or end of trial median (min, max) duration was 6.14 (0.14, 105.14) weeks
Objective Response is defined as a complete response (CR) or partial response (PR) per RECIST 1.1, confirmed by a repeat assessment at least 4 weeks later. Participants who did not experience a confirmed CR or PR, or did not have any follow-up tumor assessments were regarded as non-responders.
From Cycle 1 Day 1 until progression, start of new anticancer therapy, or end of trial median (min, max) duration was 6.14 (0.14, 105.14) weeks
Subprotocol C, Part 3: Percentage of Participants Who Experienced a Circulating Tumor Cell 0 (CTC0) Response
Zeitfenster: Cycle 1 Day 1 to 14 days post-last dose of AMG 404 (each cycle was 28 days, maximum duration of AMG 404 treatment was 105.1 weeks)
CTC0 response was defined as CTC0 (reduction of CTCs > 0 to 0 at any post-baseline measurement). The baseline was defined as the last non-missing value on or prior to the pre-dose of AMG 404 assessments on Cycle 1 Day 1.
Cycle 1 Day 1 to 14 days post-last dose of AMG 404 (each cycle was 28 days, maximum duration of AMG 404 treatment was 105.1 weeks)
Subprotocol C, Part 3: Percentage of Participants Who Experienced a CTC Conversion Response
Zeitfenster: Cycle 1 Day 1 to 14 days post-last dose of AMG 404 (each cycle was 28 days, maximum duration of AMG 404 treatment was 105.1 weeks)
CTC conversion response was defined as ≥ 5 CTCs/7.5 mL blood at baseline that converted to ≤ 4 CTCs/7.5 mL blood at any post-baseline measurement. The baseline was defined as the last non-missing value on or prior to the pre-dose assessments of AMG 404 on Cycle 1 Day 1.
Cycle 1 Day 1 to 14 days post-last dose of AMG 404 (each cycle was 28 days, maximum duration of AMG 404 treatment was 105.1 weeks)
Subprotocol C, Part 3: Percentage of Participants Who Experienced a Prostate Specific Antigen (PSA) Response
Zeitfenster: Cycle 1 Day 1 to 5 months post-last dose of AMG 404 (each cycle was 28 days, maximum duration of AMG 404 treatment was 105.1 weeks)

A PSA response was defined as the below and must have been confirmed by a second consecutive value 3 weeks later:

  • PSA 30 response: ≥ 30% reduction from the baseline PSA.
  • PSA 50 response: ≥ 50% reduction from the baseline PSA.
  • PSA 70 response: ≥ 70% reduction from the baseline PSA.
  • PSA 90 response: ≥ 90% reduction from the baseline PSA.

The baseline was defined as the last non-missing value on or prior to the pre-dose of AMG 404 assessments on Cycle 1 Day 1.

Cycle 1 Day 1 to 5 months post-last dose of AMG 404 (each cycle was 28 days, maximum duration of AMG 404 treatment was 105.1 weeks)

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Subprotocols A. B, C (Parts 1 and 2) and D: ORR
Zeitfenster: From Cycle 1 Day 1 until progression, start of new anticancer therapy, or until end of trial (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Objective Response is defined as a CR or PR per RECIST 1.1, confirmed by a repeat assessment at least 4 weeks later. Participants who did not experience a confirmed CR or PR, or did not have any follow-up tumor assessments were regarded as non-responders.
From Cycle 1 Day 1 until progression, start of new anticancer therapy, or until end of trial (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1 and 2) and D: Percentage of Participants Who Experienced a CTC0 Response
Zeitfenster: From Cycle 1 Day 1 until progression, start of new anticancer therapy, or until end of trial (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
CTC0 response was defined as CTC0 (reduction of CTCs > 0 to 0 at any post-baseline measurement). The baseline was defined as the last non-missing value on or prior to the pre-dose of acapatamab assessments on Cycle 1 Day 1 > 0.
From Cycle 1 Day 1 until progression, start of new anticancer therapy, or until end of trial (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1 and 2) and D: Percentage of Participants Who Experienced a CTC Conversion Response
Zeitfenster: From Cycle 1 Day 1 until progression, start of new anticancer therapy, or until end of trial (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
CTC conversion response was defined as ≥ 5 CTCs/7.5 mL blood at baseline that converted to ≤ 4 CTCs/7.5 mL blood at any post-baseline measurement. The baseline was defined as the last non-missing value on or prior to the pre-dose of acapatamab assessments on Cycle 1 Day 1.
From Cycle 1 Day 1 until progression, start of new anticancer therapy, or until end of trial (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1 and 2) and D: Percentage of Participants Who Experienced a PSA Response
Zeitfenster: Cycle 1 Day 1 to 5 months post-last dose of acapatamab/AMG 404 (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)

A PSA response was defined as the below and must have been confirmed by a second consecutive value 3 weeks later:

  • PSA 30 response: ≥ 30% reduction from the baseline PSA.
  • PSA 50 response: ≥ 50% reduction from the baseline PSA.
  • PSA 70 response: ≥ 70% reduction from the baseline PSA.
  • PSA 90 response: ≥ 90% reduction from the baseline PSA.

The baseline was defined as the last non-missing value on or prior to the pre-dose of acapatamab assessments on Cycle 1 Day 1.

Cycle 1 Day 1 to 5 months post-last dose of acapatamab/AMG 404 (each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Duration of CTC0 Response
Zeitfenster: From date of initial CTC0 response to the earlier of CTC0 progression or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Duration of CTC0 response was defined as the time from the date of initial CTC0 response to the earlier of CTC0 progression or death. Participants who had not ended their response at the time of analysis had duration of CTC0 response censored on the date of their last CTC0 or CTC conversion assessment.
From date of initial CTC0 response to the earlier of CTC0 progression or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Duration of CTC Conversion Response
Zeitfenster: From the date of an initial CTC conversion response to the earlier of CTC conversion progression or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Duration of CTC conversion response was defined as the time from the date of an initial CTC conversion response to the earlier of CTC conversion progression or death. Participants who had not ended their response at the time of analysis had duration of CTC response censored on the date of their last CTC0 or CTC conversion assessment.
From the date of an initial CTC conversion response to the earlier of CTC conversion progression or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Duration of PSA Response
Zeitfenster: From date of an initial PSA response (PSA 50) to the earlier of PSA progression or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Duration of PSA response was defined as the time of an initial PSA response (PSA 50) to the earlier of PSA progression or death. Participants who had not ended their response at the time of analysis had duration of PSA response censored on the date of their last PSA measurement.
From date of an initial PSA response (PSA 50) to the earlier of PSA progression or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Duration of Response Per RECIST 1.1
Zeitfenster: From date of an initial objective response per RECIST 1.1 to the earlier of soft-tissue progression per RECIST 1.1 or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Duration of response per RECIST 1.1 was defined as the time from the date of an initial objective response (CR/PR) per RECIST 1.1 to the earlier of soft-tissue progression per RECIST 1.1 or death. CR/PR must have been confirmed at least 4 weeks later. Participants who had not ended their response at the time of analysis had duration of response censored at their last evaluable tumor assessment by computed tomography (CT)/magnetic resonance imaging (MRI) scan.
From date of an initial objective response per RECIST 1.1 to the earlier of soft-tissue progression per RECIST 1.1 or death (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Overall Survival (OS)
Zeitfenster: From the date of study Day 1 until death due to any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
OS was defined as the time from the date of trial Day 1 until death due to any cause. OS time (months) = (date of death - trial Day 1 + 1) x 12/365.25. Any participant not known to have died at the time of analysis was censored based on the last recorded date on which the participant was alive. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Kalbfleisch and Prentice.
From the date of study Day 1 until death due to any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Radiographic Progression Free Survival (rPFS)
Zeitfenster: From trial Day 1 to the earlier of a radiographic progression or death from any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
rPFS was defined as the time from trial Day 1 to radiographic progression. If a participant had no evaluable post-baseline and on-trial disease assessment and was on trial without disease progression (PD) or death recorded, rPFS was censored on the date of the first dose of the investigational product (IP). rPFS was censored at the last evaluable radiographic tumor assessment date for participants who had no PD, death or new anti-cancer therapy reported, started a new anti-cancer therapy prior to PD or death, if death recorded without new anti-cancer therapy and without PD, if death or PD immediately after more than one consecutively missed tumor assessment occurred. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Brookmeyer and Crowley.
From trial Day 1 to the earlier of a radiographic progression or death from any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: PSA PFS
Zeitfenster: From trial Day 1 to the earlier of a PSA progression or death from any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
PSA PFS was defined as the interval from trial Day 1 to the earlier of a PSA progression or death from any cause; otherwise, PSA PFS was censored on the date of the last PSA measurement. If a participant had no baseline or post-baseline PSA measurement and a vital status of alive or known, PSA PFS was censored at trial Day 1. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Brookmeyer and Crowley.
From trial Day 1 to the earlier of a PSA progression or death from any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Clinical PFS
Zeitfenster: From first dose of acapatamab or AMG 404 (subprotocol C only) to clinical disease progression or death from any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Clinical PFS was defined as the time from the first dose to clinical disease progression or death from any cause. If a participant had no evaluable post-baseline or on-trial disease assessment or was on trial without PD or death recorded, clinical PFS was censored on the date of the first dose of the IP. Otherwise, clinical PFS was censored on the date of last assessment. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Brookmeyer and Crowley.
From first dose of acapatamab or AMG 404 (subprotocol C only) to clinical disease progression or death from any cause (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Time to Radiographic Progression
Zeitfenster: From trial Day 1 to radiographic progression in the absence of subsequent anticancer therapy (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)

Time to radiographic progression was defined as the interval from Day 1 to radiographic progression in the absence of subsequent anticancer therapy. If a participant had no evaluable post-baseline and on-trial disease assessment and was on trial without PD or death recorded, time to radiographic progression was censored on the date of the first dose of the IP. Time to radiographic progression was censored on the date of last evaluable radiographic tumor assessment for participants who:

  • had no PD but death recorded without new anti-cancer therapy;
  • had no PD, death, or new anti-cancer therapy;
  • had PD or death immediately after more than one consecutively missed tumor assessment;
  • started new anti-cancer therapy prior to PD or death, or prior to any other disease assessment if there is no PD or death.

The median was estimated using the Kaplan-Meier method and the 95% CI was estimated using the method by Brookmeyer and Crowley.

From trial Day 1 to radiographic progression in the absence of subsequent anticancer therapy (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Time to PSA Progression
Zeitfenster: From trial Day 1 to PSA progression (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Time to PSA progression was defined as the interval from trial Day 1 to PSA progression. If a participant had no evaluable post-baseline or on-trial PSA assessment, time to PSA progression was censored on the date of the first dose of the IP. Otherwise, time to PSA progression was censored on the date of the last PSA assessment. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Brookmeyer and Crowley.
From trial Day 1 to PSA progression (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Time to Subsequent Therapy
Zeitfenster: From trial Day 1 to the time a participant starts/receives the subsequent cancer therapy/subsequent therapy (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Time to subsequent therapy was defined as the interval from trial Day 1 to the time a participant starts/receives the subsequent cancer therapy/subsequent therapy; otherwise, time to subsequent therapy was censored at the last known date of any of the trial assessments prior to initiating the subsequent cancer therapy/subsequent therapy. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Brookmeyer and Crowley.
From trial Day 1 to the time a participant starts/receives the subsequent cancer therapy/subsequent therapy (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Percentage of Participants Who Experienced a Gallium Prostate-specific Membrane Antigen-11 (PSMA-11) Response
Zeitfenster: Cycle 1 Day 1 to 14 days post-last dose of acapatamab or AMG 404 (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
A Gallium PSMA-11 response was defined as a ≥ 50% reduction from baseline in the maximum standardized update value (SUV) using 68Gallium (68Ga)-PSMA-11 positron emission tomography (PET)/CT. PSMA-11 response percentages were based on the number of participants with a baseline PSMA assessment (defined as the last non-missing value on or prior to the pre-dose of acapatamab/AMG 404 assessments) on Cycle 1 Day 1. The 95% confidence interval was calculated based on the Clopper-Pearson method.
Cycle 1 Day 1 to 14 days post-last dose of acapatamab or AMG 404 (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Time to Symptomatic Skeletal Events
Zeitfenster: From trial Day 1 to the first symptomatic skeletal event (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Time to symptomatic skeletal events was defined as time from trial Day 1 to the first symptomatic skeletal event, otherwise time to symptomatic skeletal event was censored at the last dose of acapatamab/AMG 404 or end of safety follow-up date, whichever was later. Symptomatic skeletal events included fracture, spinal cord compression and radiation or surgery to bone. The median was estimated using the Kaplan-Meier method and the 95% confidence interval was estimated using the method by Brookmeyer and Crowley.
From trial Day 1 to the first symptomatic skeletal event (maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.14 weeks)
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Total Alkaline Phosphatase Levels
Zeitfenster: Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Alkaline phosphatase levels were collected locally and centrally.
Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Bone Specific Alkaline Phosphatase Levels
Zeitfenster: Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Bone specific alkaline phosphatase levels were collected locally and centrally.
Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Lactate Dehydrogenase Levels
Zeitfenster: Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Lactate dehydrogenase levels were collected locally and centrally.
Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Hemoglobin Levels
Zeitfenster: Baseline, safety follow-up visit (up to 30 days post-last dose of acapatamab/AMG 404), safety follow-up 2 (subprotocol C only, up to 5 months post-dose). Each cycle = 28 days, max acapatamab duration = 98.43 weeks, max AMG 404 duration = 105.1 weeks.
Hemoglobin levels were collected locally.
Baseline, safety follow-up visit (up to 30 days post-last dose of acapatamab/AMG 404), safety follow-up 2 (subprotocol C only, up to 5 months post-dose). Each cycle = 28 days, max acapatamab duration = 98.43 weeks, max AMG 404 duration = 105.1 weeks.
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Neutrophil-to-lymphocyte Ratio
Zeitfenster: Baseline, safety follow-up visit (up to 30 days post-last dose of acapatamab/AMG 404), safety follow-up 2 (subprotocol C only, up to 5 months post-dose). Each cycle = 28 days, max acapatamab duration = 98.43 weeks, max AMG 404 duration = 105.1 weeks.
Data for the neutrophil-to-lymphocyte ratio were collected locally. Neutrophil-to-lymphocyte ratio was calculated by dividing the number of absolute neutrophils by the number of lymphocytes.
Baseline, safety follow-up visit (up to 30 days post-last dose of acapatamab/AMG 404), safety follow-up 2 (subprotocol C only, up to 5 months post-dose). Each cycle = 28 days, max acapatamab duration = 98.43 weeks, max AMG 404 duration = 105.1 weeks.
Subprotocols A, B, C (Parts 1, 2 and 3) and D: Urine N-telopeptide Levels
Zeitfenster: Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Urine N-telopeptide levels were collected centrally.
Baseline and end of treatment visit (up to 14 days post-last dose of acapatamab/AMG 404. Each cycle was 28 days, maximum duration of acapatamab treatment was 98.43 weeks/AMG 404 treatment was 105.1 weeks).
Subprotocol A, B and C (Parts 1 and 2) and D: Maximum Serum Concentration (Cmax) of Acapatamab
Zeitfenster: Cycle 1: Days 1 to 7 and Cycle 2: Days 1 to 14 (each cycle was 28 days)
Serum concentrations of acapatamab were determined using a validated assay.
Cycle 1: Days 1 to 7 and Cycle 2: Days 1 to 14 (each cycle was 28 days)
Subprotocol A, B and C (Parts 1 and 2) and D: Area Under the Curve Over the Dosing Interval (AUCtau)
Zeitfenster: Cycle 1: Days 1 to 7 and Cycle 2: Days 1 to 14 (each cycle was 28 days)
Serum concentrations of acapatamab were determined using a validated assay.
Cycle 1: Days 1 to 7 and Cycle 2: Days 1 to 14 (each cycle was 28 days)
Subprotocol A, B and C (Parts 1 and 2) and D: Time to Reach Cmax (Tmax) of Acapatamab
Zeitfenster: Cycle 1: Days 1 to 7 and Cycle 2: Days 1 to 14 (each cycle was 28 days)
Serum concentrations of acapatamab were determined using a validated assay.
Cycle 1: Days 1 to 7 and Cycle 2: Days 1 to 14 (each cycle was 28 days)
Subprotocol A, B and C (Parts 1 and 2) and D: Terminal Half-life (t1/2z) of Acapatamab
Zeitfenster: Cycle 2: Days 1 to 14 (each cycle was 28 days)
Serum concentrations of acapatamab were determined using a validated assay.
Cycle 2: Days 1 to 14 (each cycle was 28 days)
Subprotocol C, Part 3: Number of Participants Who Experienced TEAEs and Treatment-related AEs
Zeitfenster: From first dose of AMG 404 to the first of 30 days after last dose of acapatamab, end of trial date or the initiation of a new anticancer therapy; median (min, max) duration was 6.14 (0.14, 105.14) weeks

A TEAE was defined as any untoward medical occurrence in a clinical trial participant irrespective of a causal relationship with the trial treatment that started after the first dose of acapatamab.

A treatment-related TEAE was defined as a TEAE that had a reasonable possibility of being caused by acapatamab.

Clinically significant changes from baseline in vital signs and clinical laboratory tests were also recorded as TEAEs.

From first dose of AMG 404 to the first of 30 days after last dose of acapatamab, end of trial date or the initiation of a new anticancer therapy; median (min, max) duration was 6.14 (0.14, 105.14) weeks

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  • Studienleiter: MD, Amgen

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Studienaufzeichnungsdaten

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Haupttermine studieren

Studienbeginn (Tatsächlich)

15. Januar 2021

Primärer Abschluss (Tatsächlich)

23. Oktober 2023

Studienabschluss (Tatsächlich)

23. Oktober 2023

Studienanmeldedaten

Zuerst eingereicht

13. November 2020

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

13. November 2020

Zuerst gepostet (Tatsächlich)

17. November 2020

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

26. August 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

4. August 2026

Zuletzt verifiziert

1. Juli 2026

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Begriffe im Zusammenhang mit dieser Studie

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IPD-Sharing-Zeitrahmen

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IPD-Sharing-Zugriffskriterien

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Art der unterstützenden IPD-Freigabeinformationen

  • STUDIENPROTOKOLL
  • SAFT
  • ICF
  • CSR

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Ja

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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