Clinical trial NCT05936658: [18F]Florastamin PET/CT Imaging Examination in Patients With Suspected Recurrent or Metastatic Prostate Cancer
Official title: A Multi-center, Open-label, Single Arm Phase III Clinical Trial for the Diagnostic Efficacy Assessment and Safety Evaluation by [18F]Florastamin PET/CT Imaging Examination in Patients With Suspected Recurrent or Metastatic Prostate Cancer
Study type: INTERVENTIONAL
Overall status: ACTIVE_NOT_RECRUITING
Phase: PHASE3
Conditions: High Risk Prostate Carcinoma
Keywords: Prostate Cancer
Lead sponsor: FutureChem
Sponsor class: INDUSTRY
First posted: 2023-07-10
Enrollment: 138
Sex: MALE
Minimum age (years): 19
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: DIAGNOSTIC

Brief summary: This is a multi-center, open-label, single arm Phase III clinical trial for the diagnostic efficacy assessment and safety evaluation by \[18F\]Florastamin PET/CT imaging examination to determine the presence of recurrent or metastatic prostate cancer in patients whose recurrent or metastatic lesions have been confirmed through the conventional imaging.

Detailed description: In this study, the diagnostic efficacy of \[18F\]Florastamin PET/CT imaging at detecting recurrent or metastatic prostate cancer will be evaluated according to the histopathology truth standard in prostate cancer patients whose recurrent or metastatic lesions have been confirmed with the conventional imaging.

Patients who meet the inclusion/exclusion criteria of the clinical study protocol will be enrolled, who then will undergo a biopsy or pelvic lymph node dissection (PLND) for one or more lesion locations confirmed with the conventional imaging within 28 days from \[18F\]Florastamin PET/CT scanning. After the biopsy or PLND, follow-up will be carried out for 2 weeks. However, if necessary, based on the judgment of the principal investigator, additional visits may be made.

1. Baseline Procedures At the baseline visit, the conventional imaging will be performed. The results of whole-body bone scan and gadolinium-enhanced MRI (for the chest, abdomen or pelvis) within 6 weeks prior to \[18F\]Florastamin PET/CT scanning will be collected. All conventional imaging examinations will be evaluated by the study site.

   At the time of whole-body bone scanning, examinations will be performed 2 hours after the contrast agent 99mTc-HDP 20 to 30 mCi is administered intravenously.

   At the time of gadolinium-enhanced MRI scanning (for the chest, abdomen or pelvis), the gadolinium contrast agent (Gadobrix 1 cc/kg) will be administered intravenously.
2. Biopsy and PLND Images collected through the conventional imaging during the baseline visit can be selectively used for images to guide a biopsy, and images to decide on biopsy sites will be read by the study site. If more than one legions are identified through the image reading, an intermediary radiology specialist will choose a lesion for which to perform a biopsy; however, among the lesions identified, the one determined to be safe for the subject in the investigator's judgment will be preferred as a site on which to perform a biopsy or PLND, and the final biopsy site will be decided after checking its justification through consultation with the intermediary Department of Radiology.

   A biopsy can be performed while hospitalized, if necessary. Pelvic lymph node dissection (PLND) is surgery to remove the lymph nodes from the pelvis, which is part of a radical prostatectomy, so it is typically performed with hospitalization.
3. Florastamin PET imaging (PSMA-PET Imaging) Uptake values of \[18F\]Florastamin in the region of interest (ROI) of Florastamin PET imaging are evaluated by an independent evaluator. The independent evaluator records all uptake values observed in the lesion, and analyzes uptake values in the lesion where the biopsy has been performed during analysis of efficacy evaluation.
4. Biopsy and Histopathology Tissues removed through a biopsy or PLND are delivered to the Department of Pathology in accordance with the guidelines of the study site and slides by biopsy or PLND site are produced. A pathologist at the study site performs histopathological evaluation of the slides produced with blinded to results of \[18F\]Florastamin PET/CT examinations. An area on which a biopsy or PLND has been performed and histopathological results thereof are collected in the eCRF.
5. Histopathology truth standard Tissues removed with a standard method in more than one lesion locations confirmed by the conventional imaging performed prior to \[18F\]Florastamin PET/CT scanning are evaluated in terms of whether there is prostate cancer, there are any other tumors, it is impossible to read, etc. In addition, the positive/negative result of \[18F\]Florastamin PET/CT imaging in the applicable location is evaluated by an independent evaluator.

Eligibility criteria: Inclusion Criteria:

1. Male aged 19 and older
2. Patients histopathologically diagnosed with prostate cancer
3. Patients who can undergo a percutaneous biopsy or PLND for more than one lesion locations with locally recurrent, new or advanced metastasis as confirmed by MRI or whole-body bone scan performed within 6 weeks prior to screening
4. Patients whose survival is expected to be at least 6 months with ECOG Performance Status ≤ 2
5. Those whose ICF was signed by themselves or their legal guardian or representative after sufficient explanation was given by the investigator about the study objectives, details, characteristics of the investigational device, etc. before enrolled for the study.

Exclusion Criteria:

1. Subjects who have the following disease within 6 months prior to screening:

   * Heart failure that falls into Class III or IV heart failure classified by New York Heart Association;
   * Embolism pulmonary, acute coronary syndrome (unstable angina or myocardial infarction);
   * Acute severe respiratory syndrome;
   * Cerebrovascular disease such as stroke;
   * Uncontrollable hypertension (SBP \> 160 mmHg or DBP \> 90 mmHg);
   * Uncontrollable heart arrhythmia;
   * Blood clotting disorder.
2. Patients who are receiving radiation therapy or ablative therapy on the prostate bed within 12 weeks prior to screening
3. Patients whose method of systemic treatment for prostate cancer (e.g., hormone therapy, biological therapy, radiation therapy, or chemotherapy) has changed within 3 months prior to screening, or who have to change orstart systemic treatment for prostate cancer while the study is being conducted (until before a biopsy or PLND) However, when systemic treatment has changed into watchful waiting, the patient can participate in the study.
4. According to the laboratory test results, patients who meet the following criteria:

   * Platelet counts (PLT) \< 50,000/μL;
   * Serum creatinine \> 1.8 mg/dL or eGFR (or GFR) \< 30 mL/min/1.7 m2;
   * AST and ALT \> 2.5 x upper limit of normal (ULN) (however, for a patient whose hepatic metastasis has been confirmed, AST and ALT \> 5 x ULN).
5. Subjects who are suffering from active infectious disease at screening and determined unfit to participate in this study;
6. Subjects with solid tumors other than prostate cancer or hematologic malignancies including lymphoma within 3 years prior to screening (however, they can be enrolled in the case of properly treated non-melanoma skin cancer)
7. Subjects who received gamma-emitting radioactive isotopes of high energy (\> 300 keV) within the period 5 times longer than the half-life of this investigational product (about 10 hours) prior to screening
8. Subjects with hypersensitivity to radioisotopes
9. Subjects who participate in other clinical studies that may affect image obtainment from \[18F\]Florastamin-PET/CT or safety evaluation following IV injection of \[18F\]Florastamin from the time of enrollment for this study until the end (however, they can be enrolled if participating in a cohort clinical study conducted mainly through simple follow-up without administration of IP from the time of enrollment for the study until the end)
10. Subjects who cannot undergo necessary imaging examinations due to medical conditions or other conditions (serious claustrophobia, radiophobia, etc.) that undermine the subject safety or compliance status for generating reliable data or completing the study in the principal investigator's judgment

Primary outcomes:
measure: The positive predictive values(PPV) Evaluation of [18F]Florastamine PET/CT
timeFrame: [18F]Florastamin PET/CT conducts at V2(1 Day/Efficacy & Safety evaluation). Biopy or PLND conducts V3(1Day ~ 28Day/Efficacy & Safety evaluation).
Secondary outcomes:
measure: Detection rates of [18F]Florastamin PET/CT imaging
timeFrame: [18F]Florastamin PET/CT conducts at V2(1 Day/Efficacy & Safety evaluation). Biopy or PLND conducts V3(1Day ~ 28Day/Efficacy & Safety evaluation).
measure: The sensitivity of [18F]Florastamin PET/CT imaging
timeFrame: [18F]Florastamin PET/CT conducts at V2(1 Day/Efficacy & Safety evaluation). Biopy or PLND conducts V3(1Day ~ 28Day/Efficacy & Safety evaluation).
measure: The positive predictive values (PPV) Comparison of [18F]Florastamin PET/CT imaging and conventional imaging
timeFrame: [18F]Florastamin PET/CT conducts at V2(1 Day/Efficacy & Safety evaluation). Biopy or PLND conducts V3(1Day ~ 28Day/Efficacy & Safety evaluation).
measure: Evaluation of the standard uptake values of [18F]Florastamin in the lesion location
timeFrame: [18F]Florastamin PET/CT conducts at V2(1 Day/Efficacy & Safety evaluation). Biopy or PLND conducts V3(1Day ~ 28Day/Efficacy & Safety evaluation).
measure: Percentage of subjects who found a different lesion in conventional imaging
timeFrame: Conventional imaging conduct at V1(-42 Days ~ 1 Days). [18F]Florastamin PET/CT conducts at V2(1 Day/Efficacy & Safety evaluation). Biopy or PLND conducts V3(1Day ~ 28Day/Efficacy & Safety evaluation).
Other outcomes:
Locations:
city: Gyeonggi-do
country: Korea, Republic of
facility: National Cancer Center
city: Seoul
country: Korea, Republic of
facility: Korea University Anam Hospital
city: Seoul
country: Korea, Republic of
facility: Samsung Medical Center
city: Seoul
country: Korea, Republic of
facility: Severance Hospital
city: Seoul
country: Korea, Republic of
facility: The Catholic University of Korea, Seoul St. Mary's Hospital
city: Soeul
country: Korea, Republic of
facility: Ewha womans university mokdong medical center
Study officials:
affiliation: National Cancer Center
name: Jae Young Joung, Ph.D
role: PRINCIPAL_INVESTIGATOR
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