- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04996602
Therapeutic Efficiency and Response to 2.0 GBq (55mCi) 177Lu-EB-PSMA in Patients With mCRPC
July 13, 2022 updated by: Peking Union Medical College Hospital
In recent years, quite a few studies have demonstrated the possibility of 177Lu-PSMA-617 therapy as a viable treatment option in metastatic castration resistant prostate cancer (mCRPC), which has been shown desired effect.
To increase tumor accumulation and retention for radioligand therapy, and reduce dosage of 177Lu, we conjugated a truncated Evans blue (EB) molecule and DOTA chelator onto PSMA-617 (EB-PSMA) and labeled it with 177Lu.
This study is designed to assess the efficiency and response to 177Lu-EB-PSMA (55 mCi) in patients with mCRPC.
Study Overview
Status
Recruiting
Conditions
Intervention / Treatment
Detailed Description
Prostate cancer is one of the most common cancers and the second most frequent cause of cancer deaths for adult men.
With the advances in the diagnosis and treatment of prostate cancer, some patients with localized prostate cancer can achieve good curative results, but there are still 10%~20% of patients progress to metastatic castration-resistant prostate cancer (mCRPC) every year, only one third of patients with mCRPC survive more than five years.
Radioligand therapy targeting prostate specific membrane antigen (PSMA), which is overexpressed in most prostate cancer and even further increased in metastatic and castration-resistant carcinomas, has been demonstrated as an effective and safe therapy in men with mCRPC.
177Lu-PSMA-617 has also shown desired effect.
However, 177Lu-PSMA-617, as a small molecule imaging agent, is cleared very quickly from the circulation.
Therefore, radiotherapy that is based on small molecules requires high doses and frequent administrations, leading to systemic toxicity.
To increase tumor accumulation and retention for radioligand therapy, and reduce dosage of 177Lu, the investigators conjugated a truncated Evans blue (EB) molecule and DOTA chelator onto PSMA-617 (EB-PSMA) and labeled it with 177Lu.
The investigators have published some articles demonstrated 177Lu-EB-PSMA had much higher accumulation in prostate cancer lesions than 177Lu-PSMA-617 and also showed an ideal effect.
This study is designed to assess the efficiency and response to 177Lu-EB-PSMA (55 mCi) in patients with mCRPC.
Study Type
Interventional
Enrollment (Anticipated)
30
Phase
- Early Phase 1
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Beijing
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Beijing, Beijing, China, 100730
- Recruiting
- Peking Union Medical College Hospital
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 90 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
Male
Description
Inclusion Criteria:
- All the patients had progressive metastatic castration-resistant prostate cancer that did not respond to androgen-suppression therapy and/or systemic chemotherapy;
- Distant metastases with high PSMA expression were confirmed on 68Ga-PSMA PET/CT within one week before the injection of 177Lu-EB-PSMA.
Exclusion Criteria:
- The exclusion criteria were a serum creatinine level of more than 150 μmol per liter, a hemoglobin level of less than 10.0 g/dl, a white-cell count of less than 4.0× 109/L, a platelet count of less than 100 × 109/L, a total bilirubin level of more than 3 times the upper limit of the normal range and a serum albumin level of more than 3.0 g per deciliter, cardiac insufficiency including carcinoid heart valve disease, a severe allergy or hypersensitivity to radiographic contrast material, claustrophobia.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: 2.0 GBq of 177Lu-EB-PSMA
The patients were intravenously injected with the dose about 2.0 GBq (55 mCi) of 177Lu-EB-PSMA and underwent 68Ga-PSMA PET/CT scans before and after the treatment.
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Patients were intravenous administrated with the dose about 2.0 GBq (55 mCi) of 177Lu-EB-PSMA every 8 weeks (±1 week) for a maximum of 3 cycles.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Therapeutic effect: PSA Response
Time Frame: through study completion, an average of 1 month
|
The serum PSA response was documented monthly until 8 weeks after the last treatment therapy, which can effectively reflect the treatment effect of prostate cancer.
Biochemical response was classified as the following: partial response (PR) if PSA decrease ≥50%, progressive disease (PD) if PSA increase ≥ 25% and stable disease (SD) if PSA increase <25% or PSA decrease <50%.
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through study completion, an average of 1 month
|
Therapeutic effect: 68Ga-PSMA PET/CT Response
Time Frame: through study completion, an average of 2 months
|
68Ga-PSMA-617 wholebody PET/CT acquisitions 8 weeks after each cycle of treatment.
The molecular response was classified according to adapted modified PERSIST 1.0 criteria.
Complete response (CR) was complete resolution of 68Ga-PSMA-617 uptake in the target lesions.
Partial response (PR) was defined as ≥30% decrease in the SUVmax of the target lesions and total Lesions PSMA from the baseline scan, and ≥ 30% increase in the SUVmax value of the target lesions and total Lesions PSMA from the baseline scan was taken as progressive disease (PD).
Neither CR, PR nor PD was considered stable disease (SD) that was <30% decrease or <30% increase of the target lesion.
Changes of SUV (ΔSUV) between pre- and post-therapeutic PET were calculated.
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through study completion, an average of 2 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Adverse events collection: Blood tests
Time Frame: through study completion, an average of 1 month
|
Blood tests including hematologic status, liver function, and renal function were performed before and every two weeks after each cycle of treatment for a period of 8 weeks.
Adverse events were categorized using the Common Toxicity Criteria for Adverse Events 5.0.
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through study completion, an average of 1 month
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
January 14, 2019
Primary Completion (Anticipated)
September 1, 2022
Study Completion (Anticipated)
December 1, 2022
Study Registration Dates
First Submitted
July 22, 2021
First Submitted That Met QC Criteria
July 30, 2021
First Posted (Actual)
August 9, 2021
Study Record Updates
Last Update Posted (Actual)
July 15, 2022
Last Update Submitted That Met QC Criteria
July 13, 2022
Last Verified
July 1, 2022
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- PekingUMCH Lu-EB-PSMA
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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