Clinical Trials List
Protocol Number1808020023
NCT Number(ClinicalTrials.gov Identfier)NCT03977610
2018-11-01 - 2022-05-31
Phase II
Recruiting1
ICD-10C61
Malignant neoplasm of prostate
ICD-10Z51.12
Encounter for antineoplastic immunotherapy
ICD-9185
Malignant neoplasm of prostate
The Role of Ga68-PSMA-11 PET Imaging in Prostate Cancer Patients Undergoing Androgen Deprivation Therapy
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Trial Applicant
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Sponsor
Chang Gung Memorial Hospital
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Trial scale
Taiwan Single Center
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Update
2025/08/20
Investigators and Locations
Linkou Chang Gung Medical Foundation
Chairman/Global PI
曾敬仁
Co-Principal Investigator
- See-Tong Pang Division of Hematology & Oncology
- 洪志宏 Division of Radiation Therapy
- Tzu-Chen Yen Division of Nuclear Medicine
- 范綱行 Division of Radiation Therapy
- 張英勛 Division of Hematology & Oncology
The Actual Total Number of Participants Enrolled
0 Recruiting
Condition/Disease
Metastatic Prostate Cancer
Objectives
It is a single-arm clinical trial. The primary endpoint is diagnostic positivity rate of Ga68-PSMA-11 in metastasis lesion. Sample size calculation is performed using two-sided one-proportion test to achieving an 82% power at the 5% level of significance. The primary measurement of positivity can be obtained for the one-proportion test with statistical hypotheses H0: P = P0 versus H1: P≠P0. We assume the alternative positivity rate is 65.9% and the null positivity rate is 43.9% which is the reference value from Maurer T et al (J Urol. 2016;195:1436-1443). Thus, the sample size needed is 43. According to the estimated missing rate 15%, the sample size in this study is 51. The sample size calculation was performed using PASS software (Power Analysis and Sample Size version 11.0.8, NCSS, Kaysville, Utah, USA). All subjects enrolled must meet eligibility criteria based on the inclusion/exclusion criteria detailed in Section 5.4 and 5.5.
For PET/CT PSMA scan, the subject will have catheter(s) placed for intravenous administration of [68Ga]PSMA-11. Subjects will receive a single intravenous bolus of 2-5 mCi [68Ga]PSMA-11 and received PET/CT scan 60 minutes later. The data acquisition begin with non-contrast CT at 120kVp, automated mAs, and a pitch of 1.5, followed by PET acquisition from the mid-thigh to skull-base, 3 minutes each bed. After image acquisition, the subject will be observed for half an hour, and will be discharged if no adverse event happens. EKG, blood and biochemistry test will be performed before and after scan no more than two weeks. Patient will underwent two times of PSMA-11 PET/CT scans before and under androgen deprivation therapy within a 10-14 weeks interval. In the follow up period, if metastatic castration-resistance status happens, patient may underwent optional PSMA-11 PET/CT scan by attending's discrimination in order to give appropriate treatment suggestions.
Time elapsed from the last PSA determination until PET scan was no more than 6 weeks in all patients. Patients will receive complementary workups. All of the images were interpreted by a team of two nuclear medicine physicians and one radiologist. In cases of questionable findings, the decision was made by consensus of at least two observers using pre-specified criteria. For patients with discrepancy image findings between each modality, biopsy results may be taken into consideration to determine the final status.
Test Drug
Ga-68 PSMA ligand
Active Ingredient
Ga68-PSMA-11 (Gallium-68 labeled HBED-CC PSMA)
Dosage Form
I.V. injection
Dosage
One time dose of 2-5 mCi (74-185 MBq)
Endpoints
Change of lesion detection number by PET imaging [ Time Frame: 10-14 weeks ]
Lesion detection number before and under androgen deprivation therapy on the PSMA PET imaging with a time interval 10-14 weeks
Lesion detection number before and under androgen deprivation therapy on the PSMA PET imaging with a time interval 10-14 weeks
Inclution Criteria
Inclusion Criteria:
Males with 40-85 years of age and life expectancy more than 3 months
Pathology-proved prostate cancer patients and classified as clinical stage III or IV (including lymph node or bone metastasis)
Willing to sign the informed consent
Males with 40-85 years of age and life expectancy more than 3 months
Pathology-proved prostate cancer patients and classified as clinical stage III or IV (including lymph node or bone metastasis)
Willing to sign the informed consent
Exclusion Criteria
Exclusion Criteria:
Unable to tolerate the PET/CT scan, such as those with claustrophobia, unable to lie still, consciousness unclear, vital sign unstable.
With renal impairment (glomerular filtration rate lower than 30 ml/min/1.73 m2), and allergy to medium contrast.
Significant abnormal lab data (AST or ALT more than three times of normal value), and high risk to conduct examination after evaluations of PI.
Patient had previous malignancy history
Patient had known allergy history or is probably allergy to Ga68-PSMA-11
Unable to tolerate the PET/CT scan, such as those with claustrophobia, unable to lie still, consciousness unclear, vital sign unstable.
With renal impairment (glomerular filtration rate lower than 30 ml/min/1.73 m2), and allergy to medium contrast.
Significant abnormal lab data (AST or ALT more than three times of normal value), and high risk to conduct examination after evaluations of PI.
Patient had previous malignancy history
Patient had known allergy history or is probably allergy to Ga68-PSMA-11
The Estimated Number of Participants
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Taiwan
51 participants
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Global
0 participants
