Diagnostisk værdi af CXCR4-målrettet PET/CT ved ACTH-afhængigt og uafhængigt Cushings syndrom
CXCR4-målrettet PET-scanning til differentiel diagnostik af ACTH-afhængigt og ACTH-uafhængigt Cushings syndrom: Et prospektivt observationsstudie
In previous clinical practice, 68Ga-Pentixafor PET/CT has demonstrated promising diagnostic utility in various neuroendocrine tumors by targeting CXCR4, a chemokine receptor overexpressed in several ACTH-secreting neoplasms. Building on this, and leveraging the Nuclear Medicine expertise at Peking Union Medical College Hospital, we aim to conduct a prospective observational study investigating the role of CXCR4-targeted PET/CT imaging in patients with confirmed or suspected Cushing's syndrome. This study will focus on evaluating the capability of ^68Ga-Pentixafor PET/CT to assist in the differential diagnosis of ACTH-dependent and ACTH-independent subtypes, as well as in the localization of primary lesions in challenging cases. Imaging performance will be assessed in comparison with conventional modalities and/or 68Ga-DOTATATE PET/CT when available.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Fase 2
- Fase 1
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Zhaohui Zhu, MD
- Telefonnummer: 86-13611093752
- E-mail: 13611093752@163.com
Studiesteder
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Beijing Municipality
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Beijing, Beijing Municipality, Kina, 100730
- Rekruttering
- Peking Union Medical College Hospital
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Kontakt:
- Zhaohui Zhu, MD
- Telefonnummer: 86-13611093752
- E-mail: 13611093752@163.com
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Clinical suspicion or confirmed diagnosis of Cushing's syndrome, based on clinical features (e.g., central obesity, moon face, muscle weakness) and/or abnormal cortisol-related biochemical tests.
- Able and willing to undergo PET/CT imaging with both 68Ga-Pentixafor and, when applicable, 68Ga-DOTATATE.
- Willing to provide informed consent for participation in the study.
Exclusion Criteria:
- Prior administration of therapeutic or investigational radiopharmaceuticals within 5 physical half-lives before study imaging.
Pregnancy or breastfeeding.
- History of allergic reaction to gallium-based tracers or related compounds.
- Clinically unstable condition or severe organ dysfunction that, in the investigator's opinion, would interfere with PET/CT imaging or study participation.
- Inability to complete both 68Ga-Pentixafor and, when applicable, 68Ga-DOTATATE PET/CT imaging due to clinical or logistical reasons.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: 68Ga-Pentixafor PET/CT
All enrolled participants will undergo ^68Ga-Pentixafor PET/CT to evaluate CXCR4 expression patterns and assist in the differential diagnosis of ACTH-dependent and ACTH-independent subtypes. In cases where ectopic ACTH syndrome (EAS) is clinically suspected-such as in patients with inconclusive pituitary imaging or discordant biochemical profiles-an additional ^68Ga-DOTATATE PET/CT scan will be performed as part of the diagnostic workup. This allows for a head-to-head comparison between CXCR4-targeted and somatostatin receptor (SSTR)-targeted imaging modalities in the localization of ACTH-secreting tumors. |
All enrolled participants will undergo ^68Ga-Pentixafor PET/CT to evaluate CXCR4 expression patterns and assist in the differential diagnosis of ACTH-dependent and ACTH-independent subtypes. In cases where ectopic ACTH syndrome (EAS) is clinically suspected-such as in patients with inconclusive pituitary imaging or discordant biochemical profiles-an additional ^68Ga-DOTATATE PET/CT scan will be performed as part of the diagnostic workup. This allows for a head-to-head comparison between CXCR4-targeted and somatostatin receptor (SSTR)-targeted imaging modalities in the localization of ACTH-secreting tumors. |
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Diagnostic value
Tidsramme: From baseline PET/CT assessment to end of study (approximately 12 months)
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Sensitivity and Specificity of 68Ga-Pentxiafor PET/CT for Cushing's Syndrome |
From baseline PET/CT assessment to end of study (approximately 12 months)
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- PUMCH-68Ga-CXCR4-Cushing
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
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