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| Name | Class |
|---|---|
| The First People's Hospital of Lianyungang | OTHER |
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The goal of this clinical trial is to learn if long-term use of memantine hydrochloride can treat, prevent, or correct castration resistance and drug resistance in advanced prostate cancer. The study will enroll male patients aged 18 and older diagnosed with metastatic castration-resistant prostate cancer (mCRPC) who have previously failed first or second-line treatments. The main questions it aims to answer are:
What is the progression-free survival (PFS) in patients treated with memantine hydrochloride? What is the disease control rate (DCR) and what is the change in Prostate-Specific Antigen (PSA) levels after treatment?
Researchers will compare outcomes from participants in this single-arm study to an external historical control group of patients who received traditional treatment to see if the addition of memantine hydrochloride improves prognosis.
Participants will be asked to do the following:
Continue their standard of care treatment, which includes Androgen Deprivation Therapy (ADT) and a novel endocrine therapy.
Take the study drug, memantine hydrochloride, with the dose gradually increasing over the first three weeks to a maintenance dose.
Attend regular follow-up appointments for blood tests to check PSA levels and undergo imaging scans to monitor the disease status. These follow-ups will occur one month after starting the drug and every three months thereafter.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Experimental: Memantine Hydrochloride | Experimental | Participants will receive the study drug, memantine hydrochloride, in addition to their ongoing standard of care treatment. The standard of care background therapy consists of Androgen Deprivation Therapy (ADT) using a GnRH agonist or antagonist , combined with a novel endocrine therapy such as abiraterone acetate or enzalutamide, based on the patient's prior treatment history. The dosing for memantine hydrochloride is as follows: Week 1: 5 mg once daily. Week 2: 10 mg once daily. Week 3: 15 mg once daily. Week 4 and thereafter: 20 mg once daily as a maintenance dose. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Memantine Hydrochloride | Drug | Memantine Hydrochloride is administered orally, once daily, in combination with the patient's ongoing standard of care treatment for metastatic castration-resistant prostate cancer (mCRPC). The dosing follows a weekly titration schedule for the first three weeks to reach the maintenance dose. Week 1: 5 mg once daily. Week 2: 10 mg once daily. Week 3: 15 mg once daily. Week 4 and onwards: 20 mg once daily. This intervention is being studied to evaluate its potential to reduce neuroendocrine differentiation and correct castration resistance in advanced prostate cancer. |
| Measure | Description | Time Frame |
|---|---|---|
| Progression-Free Survival (PFS) | PFS is defined as the time from treatment initiation to the first documentation of disease progression or death from any cause, whichever comes first. Disease progression is a composite event, defined by either biochemical progression (per PCWG3 criteria using blood PSA levels) or radiological progression (per RECIST 1.1 criteria using imaging such as pelvic CT or prostate MRI). | Assessed at 1 month post-treatment initiation, and every 3 months thereafter, until disease progression, death, or study completion, up to a maximum of 1 year |
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Inclusion Criteria:
Exclusion Criteria:
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After the publication of primary study results in a peer-reviewed journal, de-identified individual participant data (IPD) that underlie the results, as well as the study protocol, will be made available upon reasonable request to the Principal Investigator (PI).
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot | Yes | No | No | Study Protocol | Jul 22, 2025 | Aug 29, 2025 | Prot_000.pdf |
| ICF | No | No | Yes | Informed Consent Form | Jul 22, 2025 | Aug 29, 2025 | ICF_001.pdf |
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| ID | Term |
|---|---|
| D011471 | Prostatic Neoplasms |
| ID | Term |
|---|---|
| D005834 | Genital Neoplasms, Male |
| D014565 | Urogenital Neoplasms |
| D009371 | Neoplasms by Site |
| D009369 | Neoplasms |
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| ID | Term |
|---|---|
| D008559 | Memantine |
| ID | Term |
|---|---|
| D000547 | Amantadine |
| D000218 | Adamantane |
| D001952 | Bridged-Ring Compounds |
| D006844 | Hydrocarbons, Cyclic |
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|
| D005832 |
| Genital Diseases, Male |
| D000091662 | Genital Diseases |
| D000091642 | Urogenital Diseases |
| D011469 | Prostatic Diseases |
| D052801 | Male Urogenital Diseases |
| D006838 |
| Hydrocarbons |
| D009930 | Organic Chemicals |