Study of Natural Killer Cells in Patients With Metastatic Prostate Cancer: Relationship With Survival and Response Time to Castration

Study Overview
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Brief Summary
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Prospective research of Natural Killer cells as predictive biomarkers to stratify patients likely to have longer response time to castration.

Detailed Description
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The main objective is to validate prospectively the results of a retrospective study showing a correlation between the level of NKp30 and NKp46 receptor-activators expression on the surface of NK cells and 1) the survival time, 2) the response time to castration in patients with metastatic prostate cancer. Prospective monocenter, open-label study. During a visit in the frame of management of the disease, a single blood sample will be collected. Patients will then have a standard care follow-up for a period of 5 years. Follow up data (death, progression) will be collected every 6 months.

Official Title
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Prospective Study of Natural Killer Cells in Patients With Metastatic Prostate Cancer: Relationship With Survival and Response Time to Castration

Conditions
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Metastatic Prostate Cancer

Intervention / Treatment
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* Other: Blood samples


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient with metastatic prostate cancer. Aged of 18 years or more. Patient in period of sensitivity to castration (patient non castrated or castration performed less than 1 year ago) and lack of progression. Patient having signed an informed consent. Patient affiliated to the national Social Security regimen or beneficiary of this regimen. Exclusion Criteria: Patient under chemotherapy treatment at the time of sampling Patient under corticotherapy treatment at the time of sampling Patient in emergency situation, adult subject to a measure of legal protection (placed under judicial protection, tutorship, or curatorship), or unable to give consent. Any psychological, familial, sociological or geographical condition potentially hampering compliance with the study medical follow-up Contraindications to study procedure

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Metastatic prostate cancer blood samples<br> | Other: Blood samples<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Response time to castration | Time of occurrence of: confirmed PSA rise + serum testosterone < 0.50 ng/mL and/or radiological progression according to the modified PCWG2 criteria (progression according to the RECIST criteria v1.1 or documented by the appearance of at least 2 new lesions on the bone scan) | every 6 months during 3 years-follow up | 
| Survival |  | every 6 months during 3 and 5 years-follow up | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Level of alcaline phosphatase |  | at diagnostic (before inclusion in the study) and at time of treatment for progression in the course of 3 years-follow-up | 
| Tumor volume |  | at diagnostic (before inclusion in the study) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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prostate, metastatic