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Diagnostic Performance of ACP3-Targeted PET Imaging in Patients With Primary and Recurrent Prostate Cancer: An Open-Label, Single-Arm, Single-Center Study

21. September 2026 aktualisiert von: Yong He

A Study to Evaluate the Diagnostic Performance of ACP3-Targeted PET Imaging in Patients With Primary and Recurrent Prostate Cancer: An Open-Label, Single-Arm, Single-Center Study

This study aims to evaluate the diagnostic performance of [68Ga]Ga-OncoACP3 PET imaging, which targets prostate acid phosphatase (ACP3), in men with clinically suspected or confirmed high-risk prostate cancer, or suspected recurrence after treatment. The study will assess the ability of this imaging to detect lesions and its diagnostic performance, including sensitivity, specificity, and accuracy. Histopathology and/or clinical follow-up of at least 6 months will be used as the reference standard. Participants will receive a single intravenous injection of [68Ga]Ga-OncoACP3 and undergo a PET/CT scan about 1 hour later. For participants who have already undergone clinically routine PSMA PET imaging, a comparison between the two imaging modalities will be performed. The study will enroll 50 men aged 18 to 90 years. Additionally, the study will explore the correlation between semi-quantitative parameters derived from [68Ga]Ga-OncoACP3 PET imaging and pathological markers (ACP3 expression assessed by immunohistochemistry in tumor tissue), and will evaluate the impact of [68Ga]Ga-OncoACP3 PET imaging on clinical treatment decisions.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Background Prostate cancer is the second most common cancer in men worldwide. Accurate diagnosis, staging, and risk stratification are critical for optimal management. PSMA PET imaging has improved prostate cancer detection but has limitations, including heterogeneous PSMA expression leading to false negatives, and physiological uptake in salivary glands, liver, spleen, and intestine that can obscure lesions or cause false-positive findings. ACP3 (prostate acid phosphatase, PAP) is highly and homogeneously expressed in more than 95% of prostate cancer lesions but has low expression in healthy tissues. OncoACP3 is a small-molecule ligand with picomolar affinity for ACP3. Preclinical and early clinical studies suggest that [68Ga]Ga-OncoACP3 PET has favorable biodistribution, low background uptake, and high tumor-to-background ratios, potentially outperforming PSMA PET in certain settings.

Study Objectives Primary objective: To prospectively evaluate the lesion detection rate and diagnostic performance (including sensitivity, specificity, accuracy, positive predictive value, and negative predictive value) of [68Ga]Ga-OncoACP3 PET imaging in men with clinically suspected or confirmed high-risk prostate cancer, or suspected recurrence after treatment.

Secondary objectives: (1) comparison with [68Ga]Ga-PSMA PET imaging in participants who have already undergone clinically routine PSMA PET; (2) correlation of semi-quantitative parameters derived from [68Ga]Ga-OncoACP3 PET imaging with pathological markers (ACP3 expression assessed by immunohistochemistry in tumor tissue); (3) evaluation of the impact of [68Ga]Ga-OncoACP3 PET imaging on clinical treatment decisions.

Study Design This is a prospective, single-arm, single-center, open-label clinical study enrolling 50 male participants aged 18 to 90 years with clinically suspected or confirmed high-risk prostate cancer, or suspected recurrence after treatment. After enrollment and informed consent, participants will undergo [68Ga]Ga-OncoACP3 PET/CT imaging within 1 week. A single intravenous dose of 3-5 mCi [68Ga]Ga-OncoACP3 will be administered, followed by PET/CT imaging at 1 hour post-injection. For participants who have already undergone clinically routine PSMA PET imaging, a comparison between the two imaging modalities will be performed. Image analysis will include visual qualitative assessment and semi-quantitative analysis (e.g., standardized uptake value). The gold standard for diagnosis will be histopathological examination and/or clinical follow-up of at least 6 months. The study will also assess the correlation between semi-quantitative PET parameters and ACP3 expression in tumor tissue, and evaluate the impact of imaging findings on clinical management.

Studientyp

Interventionell

Einschreibung (Geschätzt)

50

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

    • Hubei
      • Wuhan, Hubei, China, 430071
        • Zhongnan Hospital of Wuhan University
        • 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 90 Jahre (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Männlich

Beschreibung

Inclusion Criteria:

  • Voluntary participation and signed written informed consent before any study-specific procedures;
  • Male, aged 18 to 90 years;
  • Clinically suspected high-risk, histologically confirmed, or suspected recurrent prostate cancer after treatment;
  • Willing and able to comply with scheduled visits, treatment plans, laboratory tests, and other study-related procedures;
  • Expected survival time greater than 6 months;
  • Participants' partners agree to use reliable contraceptive measures (such as abstinence, sterilization surgery, oral contraceptives, injectable medroxyprogesterone acetate, or subdermal implants) during the study and for at least 6 months after the last dose of study drug.

Exclusion Criteria:

  • Known or suspected allergy to [68Ga]Ga-OncoACP3 injection or any of its excipients;
  • Any severe unstable disease (e.g., severe cardiac, pulmonary, hepatic, or renal insufficiency) that, in the investigator's judgment, makes the participant unsuitable for the study;
  • Inability to complete PET/CT examination, including inability to lie flat, claustrophobia, or radiophobia;
  • Poor compliance or any other condition that, in the investigator's judgment, makes the participant unsuitable for the study;
  • Prior use of a radiopharmaceutical within less than 10 physical half-lives before study drug administration;
  • Currently participating in or planning to participate in any drug or device clinical trial during the study period.

Studienplan

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

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Diagnose
  • Zuteilung: N / A
  • Interventionsmodell: Einzelgruppenzuweisung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: [68Ga]Ga-OncoACP3 PET Imaging

Participants receive a single intravenous injection of 3-5 mCi [68Ga]Ga-OncoACP3, followed by PET/CT imaging at about 1 hour post-injection.

[68Ga]Ga-OncoACP3 is a small-molecule PET imaging agent targeting ACP3 (prostate acid phosphatase). It is radiolabeled with Gallium-68 and administered as a single intravenous dose of 3-5 mCi. PET/CT imaging is performed at about 1 hour post-injection.

Andere Namen:
  • OncoACP3

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Lesion Detection Rate of [68Ga]Ga-OncoACP3 PET Imaging
Zeitfenster: Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Proportion of participants with at least one prostate cancer lesion detected by [68Ga]Ga-OncoACP3 PET/CT imaging, using histopathology and/or clinical follow-up of at least 6 months as the reference standard.

Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging
Sensitivity of [68Ga]Ga-OncoACP3 PET Imaging
Zeitfenster: Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Sensitivity of [68Ga]Ga-OncoACP3 PET/CT imaging for detecting tumor lesions, using histopathology and/or clinical follow-up of at least 6 months as the reference standard.

Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging
Specificity of [68Ga]Ga-OncoACP3 PET Imaging
Zeitfenster: Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Specificity of [68Ga]Ga-OncoACP3 PET/CT imaging for detecting tumor lesions, using histopathology and/or clinical follow-up of at least 6 months as the reference standard.

Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging
Accuracy of [68Ga]Ga-OncoACP3 PET Imaging
Zeitfenster: Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Accuracy of [68Ga]Ga-OncoACP3 PET/CT imaging for detecting tumor lesions, using histopathology and/or clinical follow-up of at least 6 months as the reference standard.

Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Comparison with [68Ga]Ga-PSMA PET Imaging
Zeitfenster: Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Comparison of lesion detection rate and diagnostic performance between [68Ga]Ga-OncoACP3 PET/CT and [68Ga]Ga-PSMA PET/CT in participants who have undergone clinically routine PSMA PET imaging.

Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging
Correlation Between Semi-Quantitative PET Parameters and ACP3 Expression
Zeitfenster: Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging

Correlation between semi-quantitative parameters (e.g., standardized uptake value) derived from [68Ga]Ga-OncoACP3 PET imaging and ACP3 expression assessed by immunohistochemistry in tumor tissue.

Up to 6 months after [68Ga]Ga-OncoACP3 PET imaging
Impact on Clinical Treatment Decisions
Zeitfenster: Within 1 month after [68Ga]Ga-OncoACP3 PET imaging

Proportion of participants whose clinical treatment decisions were changed based on [68Ga]Ga-OncoACP3 PET imaging findings.

Within 1 month after [68Ga]Ga-OncoACP3 PET imaging

Mitarbeiter und Ermittler

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

Sponsor

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

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)

1. Oktober 2026

Primärer Abschluss (Geschätzt)

1. Juni 2028

Studienabschluss (Geschätzt)

1. Juni 2028

Studienanmeldedaten

Zuerst eingereicht

15. September 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

15. September 2026

Zuerst gepostet (Tatsächlich)

21. September 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

23. September 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

21. September 2026

Zuletzt verifiziert

1. September 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • LYL2026287

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

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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