Denne side blev automatisk oversat, og nøjagtigheden af ​​oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

Magnetisk resonans (MR) billeddannelse med hyperpolariseret 13C-pyruvat +/- 13C,15N-urea hos patienter med prostatakræft

9. november 2026 opdateret af: Robert Bok, MD, PhD

Et fase 2-studie af magnetisk resonans (MR) billeddannelse med hyperpolariseret 13C-pyruvat +/- 13C,15N-urea hos patienter med prostatakræft, der gennemgår strålebehandling

This is a Phase 2 clinical study of hyperpolarized (HP) 13C-pyruvate (13C), 15N-urea (13C,15N) metabolic MR imaging in prostate cancer patients who are undergoing or have received radiation therapy for prostate cancer.

Studieoversigt

Status

Aktiv, ikke rekrutterende

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

PRIMARY OBJECTIVES:

I. Part 1: To Optimize the imaging sequences that maximize signal-to-noise ratio (SNR) and intra-tumoral kPL and kPG in regions of tumor vs. adjacent benign tissue as assessed by mpMRI imaging characteristics.

II. Part 2A To perform HP 13C-MRI and measure the changes in tumoral kPL and kPG.

III. Part 2B: To perform HP 13C-MRI and study the metabolic effects (changes in tumor kPL and kPG).

IV. Part 3: To perform HP 13C-MRI at time of Biochemical Failure and measure tumoral kPL and kPG, in previously external beam radiation therapy (EBRT) treated patients.

SECONDARY OBJECTIVES:

I. To evaluate the intra-patient variability in intra-tumoral kPL and kPG with repeated dose studies (Part 1, 2 & 3).

II. To determine the association between peak intra-tumoral kPL observed on baseline imaging with serum PSA. (Part 2 & 3).

III. To determine the association between changes in intra-tumor kPL after 4-12 weeks of systemic hormone therapy and PSA response (Part 2B).

IV. To compare and contrast intra-tumoral kPL and kPG with Prostate Imaging Reporting and Data System (PI-RADS) version 2 and individual mpMRI parameters including apparent diffusion coefficient (ADC) on diffusion-weighted imaging (Part 1, 2 & 3).

V. To describe the frequency of up-grading of tumor with MR/US-guided fusion biopsy obtained following baseline HP-MRI exam. (Part 3).

VI. To further characterize the safety profile of HP C-13 pyruvate injections (Part 1, 2 & 3).

VII. For patients imaged with HP 13C-MRI at time of biochemical failure post-EBRT, correlate peak intra-tumoral kPL and kPG with radiotherapy dose distributions from EBRT course (Part 3).

VIII. For studies incorporating HP 13C-urea, the baseline and the on-treatment changes in urea AUC parameter will be measured and compared to kPL endpoints of the same lesions (Part 1, 2 & 3).

OUTLINE:

The study is divided into 3 parts. Part 1: Participants undergo imaging as part of a multi-parametric magnetic resonance imaging (mpMRI) exam to determine exact parameters for imaging.

Part 2A: Participants planned for external beam radiotherapy (EBRT) Part 2B: Participants with high-risk localized prostate cancer planned to receive primary radiation therapy with concurrent systemic hormone therapy Part 3: Evaluable EBRT participants scanned at time of biochemical failure and MR/US fusion-guided prostate biopsy within 12 weeks. Participants have the option of undergoing a follow up HP Pyruvate +/- Urea MR exam 6-15 months following the baseline scan.

All participants will receive a scan at baseline and other procedures may be performed as part of routine, non-interventional standard of care at the time of biochemical failure, including serial prostate-specific antigen (PSA) monitoring and gene expression profiling of tumor tissue. Participants will be followed for 24 months after last procedure or removal from study, or until death, whichever occurs first.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

161

Fase

  • Fase 2

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • California
      • San Francisco, California, Forenede Stater, 94143
        • University of California, San Francisco

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år og ældre (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Han

Beskrivelse

Inclusion Criteria:

  1. Participants must have biopsy-proven adenocarcinoma of the prostate, as determined by medical chart review.

  2. For:

    1. Part 1: Participants post-radiation therapy or currently considering EBRT.
    2. Part 2A: Participants currently scheduled for or considering EBRT (no neo-adjuvant therapy planned).
    3. Part 2B: Participants currently scheduled for or considering EBRT and neo-adjuvant therapy is planned. The participant has biopsy-proven adenocarcinoma of the prostate with high-risk disease, defined by the presence of at least two of following criteria: a tumor stage of T3 or T4, a Gleason score of 8 to 10, or a PSA level ≥40 ng/mL) and the participant must be planning to receive androgen deprivation therapy (ADT) with an Luteinizing hormone-releasing hormone (LHRH) agonist or antagonist. The addition of an androgen-receptor (AR) signaling inhibitor (e.g., abiraterone, bicalutamide,apalutamide, enzalutamide or darolutamide) will be allowed.
    4. Part 3: Participants who have previously received radiation treatment to the prostate and are exhibiting signs of biochemical failure, with planned fusion biopsy within 12 weeks following completion of baseline HP 13C pyruvate +/-urea mpMRI.
  3. Participant is able and willing to comply with study procedures and provide signed and dated informed consent.

  4. Eastern Cooperative Oncology Group (ECOG) performance status <= 1.

  5. Age >= 18 years old at time of study entry.

  6. Ability to understand and the willingness to sign a written informed consent document.

  7. Demonstrates adequate organ function as defined below:

    1. White Blood Cell count (WBC) >=4000 cells/μL.
    2. Hemoglobin ≥9.0 gm/dL.
    3. Platelets ≥75,000 cells/μL.
    4. Renal Function > 30 Epithelial Growth Factor Receptor (eGFR).

Exclusion Criteria:

  1. Evidence of pelvic regional or distant metastatic disease on conventional imaging (MRI, computed tomography or whole body bone scan) or prostate-specific membrane antigen (PSMA) Positron Emission Tomography (PET) imaging. PSMA-avid lymph nodes confined to the pelvis will be allowed if <1 centimeter (cm).
  2. Prostate biopsy performed within 14 days prior to baseline C-13 HP pyruvate MRI.
  3. Poorly controlled hypertension, with blood pressure at study entry > 160 mm Hg systolic or > 100 mm Hg diastolic. Treatment with anti-hypertensives and re-screening is permitted.
  4. Contraindication to or inability to tolerate MRI with endorectal coil (e.g. severe claustrophobia, presence of cardiac pacemaker, aneurysm clip, severe or painful hemorrhoids, rectal stricture).
  5. Congestive heart failure with New York Heart Association (NYHA) status >= 2.
  6. History of clinically significant ECG abnormality, including QT prolongation, a family history of prolonged QT interval syndrome or myocardial infarction within 6 months of study entry.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Diagnostisk
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Part 1: Image Optimization Group

Participants will undergo Hyperpolarized 13C-Pyruvate +/- 13C,15N-Urea imaging as part of a multi-parametric magnetic resonance imaging (mpMRI) exam, with the primary objective of optimizing imaging sequences and techniques to maximize signal-to-noise ratio of imaging modality.

Given IV

Andre navne:
  • 13C-Pyruvat,15N-urinstof

Imaging scan

Andre navne:
  • mpMRI
Eksperimentel: Part 2A: Prospective imaging (External beam radiotherapy (EBRT) Participants)

Participants with pre-planned, non-interventional stereotactic body radiotherapy (EBRT) will undergo an HP Pyruvate +/-Urea mpMRI exam at baseline, at 3 months post-EBRT treatment and at 1yr post-treatment.

Given IV

Andre navne:
  • 13C-Pyruvat,15N-urinstof

Imaging scan

Andre navne:
  • mpMRI

External beam radiotherapy given outside of this study

Andre navne:
  • EBRT
Eksperimentel: Part 2B: Prospective imaging (High-risk localized prostate cancer)

Participants with with high-risk localized prostate cancer and have pre-planned, non-interventional primary radiation therapy (RT) with concurrent, systemic, non-interventional hormone therapy will undergo HP Pyruvate+/-Urea mpMRI at baseline prior to the start of systemic hormone therapy, 4-12 weeks after the initiation of systemic hormone therapy (prior to radiation therapy), at 3 months post-radiation therapy, and at +1yr post-radiation therapy.

Given IV

Andre navne:
  • 13C-Pyruvat,15N-urinstof

Imaging scan

Andre navne:
  • mpMRI

Radiation therapy given outside of this study

Andre navne:
  • RT

Therapy given outside of this study as part of standard of care

Andre navne:
  • Ikke-interventionel, systemisk hormonbehandling
Eksperimentel: Part 3: EBRT participants at time of biochemical recurrence (BCR)

Evaluable EBRT participants who undergo HP Pyruvate +/-Urea mpMRI at time of biochemical failure, followed by magnetic resonance (MR) / ultrasound (US) fusion-guided prostate biopsy within 12 weeks following baseline MR exam. Participants in this group have the option of undergoing a follow up HP Pyruvate +/-Urea MR exam 6-15 months following the baseline scan, to evaluate for any interval change.

Given IV

Andre navne:
  • 13C-Pyruvat,15N-urinstof

Imaging scan

Andre navne:
  • mpMRI

External beam radiotherapy given outside of this study

Andre navne:
  • EBRT

Biopsies may be taken from Trans-rectal ultrasound (TRUS) -visible lesion at the urologist's discretion

Andre navne:
  • Biopsi

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Signal-to-noise ratio (Part 1)
Tidsramme: Day of MR imaging (1 day)

A signal-to-noise ratio is defined as a MR/spectroscopy parameter, consisting of the HP C13-Pyruvate or Lactate signal (peak) relative to background noise level (baseline) in MRI spectra of the tissue.

Day of MR imaging (1 day)
Mean HP 13C-pyruvate to lactate metabolic rate of conversion (kPL) over time (Part 2A)
Tidsramme: Up to 24 months

The mean percent change in tumoral kPL between baseline and 1-year post-EBRT will be reported.

Up to 24 months
Mean HP 13C-pyruvate to glutamate metabolic rate of conversion (kPG) over time (Part 2A)
Tidsramme: Up to 24 months

The mean percent change in tumoral kPG between baseline and 1-year post-EBRT will be reported.

Up to 24 months
Mean change in on-treatment kPL over time (Part 2B)
Tidsramme: Up to 24 months

Mean percent change in tumoral kPL for participants receiving systemic hormone therapy between baseline and 1 -year post-EBRT will be reported.

Up to 24 months
Mean change in on-treatment kPG over time (Part 2B)
Tidsramme: Up to 24 months

Mean percent change in tumoral kPG for participants receiving systemic hormone therapy between baseline and 1 -year post-EBRT will be reported.

Up to 24 months
Mean kPL at time of biochemical failure (Part 3)
Tidsramme: Up to 24 months

The mean kPL for participants with biochemical failure will be reported.

Up to 24 months
Mean kPG at time of biochemical failure (Part 3)
Tidsramme: Up to 24 months

The mean kPG for participants with biochemical failure will be reported.

Up to 24 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Intra-patient variability of kPL
Tidsramme: Up to 12 months

Intra-patient variability in the kPL will be summarized by the intraclass correlation and presented with a 90% confidence interval when multiple HP-MRI scans are obtained for a participant.

Up to 12 months
Intra-patient variability of kPG
Tidsramme: Up to 12 months

Intra-patient variability in the kPG will be summarized by the intraclass correlation and presented with a 90% confidence interval when multiple HP-MRI scans are obtained for a participant.

Up to 12 months
Mean intra-tumoral kPL above and below the median PSA (Parts 2-3) and the mean serum PSA
Tidsramme: Up to 24 months

The study cohort will be dichotomized by mean intra-tumoral kPL obtained at baseline with median serum PSA and will be compared between the two dichotomized subgroups using Mann-Whitney test.

Up to 24 months
Correlation of kPL with Prostate Imaging Reporting and Data System (PI-RADS) version 2 classification score
Tidsramme: Up to 24 months

Spearman's rank order correlation coefficient will be used to determine the relationship between kPL with PI-RADS version 2 classification score (1 through 5; PI-RADS 1 - Very low (clinically significant cancer is highly unlikely to be present) PI-RADS 2 - Low (clinically significant cancer is unlikely to be present)). The Spearman's correlation coefficient (rs) measures the strength and direction of association between two variables. The Spearman correlation coefficient, rs, can take values from +1 to -1 where a value of +1 indicates a perfect association, an rs of 0 indicates no association and an rs of -1 indicates a perfect negative association. The closer rs is to 0, the weaker the association.

Up to 24 months
Correlation of kPG with PI-RADS version 2 classification score
Tidsramme: Up to 24 months

Spearman's rank order correlation coefficient will be used to determine the relationship between kPL with PI-RADS version 2 classification score (1 through 5; PI-RADS 1 - Very low (clinically significant cancer is highly unlikely to be present) PI-RADS 2 - Low (clinically significant cancer is unlikely to be present)). The Spearman's correlation coefficient (rs) measures the strength and direction of association between two variables. The Spearman correlation coefficient, rs, can take values from +1 to -1 where a value of +1 indicates a perfect association, an rs of 0 indicates no association and an rs of -1 indicates a perfect negative association. The closer rs is to 0, the weaker the association.

Up to 24 months
Proportion of participants with concordant mismatch of low HP 13C-urea perfusion (ureaAUC)
Tidsramme: Up to 24 months

A secondary endpoint will be to identify concordant mismatch of low HP 13C-urea perfusion (ureaAUC) in lesions assessed for kPL.

Up to 24 months
Mean percent change in kPL over time for participants with optional scan
Tidsramme: Up to 24 months

For the subset of participants who undergo optional follow up MR scan following baseline MRI, the mean percent change from baseline in kPL will be descriptively reported using summary statistics.

Up to 24 months
Number of participants with reported treatment-related adverse events
Tidsramme: From start of HP 13C-pyruvate MR imaging to 20 minutes after the procedure for all scans

The incidence of adverse events as graded by Common Toxicity Criteria version 5.0 will be determined

From start of HP 13C-pyruvate MR imaging to 20 minutes after the procedure for all scans

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Ledende efterforsker: Robert Bok, MD, PhD, University of California, San Francisco

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 (Faktiske)

24. september 2024

Primær færdiggørelse (Anslået)

31. december 2028

Studieafslutning (Anslået)

31. oktober 2032

Datoer for studieregistrering

Først indsendt

25. april 2024

Først indsendt, der opfyldte QC-kriterier

25. april 2024

Først opslået (Faktiske)

30. april 2024

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

12. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

9. november 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 24922
  • 5R01CA238379 (U.S. NIH-bevilling/kontrakt)
  • NCI-2024-03775 (Registry Identifier: NCI Clinical Trials Reporting Program)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ja

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .