Study to Evaluate Efficacy and Safety of Histrelin Subdermal Implant in Men With Advanced Prostate Cancer

Study Overview
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Brief Summary
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Objective was to evaluate the efficacy and safety of the histrelin acetate subdermal implant (originally versus Lupron Depot-3 Month) in male patients with advanced prostate cancer during 52 weeks of treatment with the implant. After consultation w/ FDA, design was modified to eliminate the Lupron arm and continued the study as an open-label non-randomized study. Primary endpoint was testosterone suppression, as assessed by the percent of patients whose testosterone indicated chemical castration levels (<=50 ng/dL) through 52 weeks of treatment with an implant.

Detailed Description
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Other outcome measures included serum levels of LH, PSA, as well as non-clinical assessments, eg, WHO Performance Status, pain level assessment, and quality of life questionnaires. Safety was evaluated via adverse events, vital signs, clinical laboratory outcomes, physical examinations, and ECGs. Local tolerability outcomes were also evaluated. An extension period for the study included annual replacement of the implant until the implant was approved by the FDA (October 12, 2004). Efficacy and safety were followed during the extension period.

Official Title
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Phase III, Open-Label Study to Evaluate Efficacy and Safety of Histrelin Subdermal Implant in Patients With Advanced Prostate Cancer

Conditions
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Prostate Cancer, Adenocarcinoma of the Prostate

Intervention / Treatment
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* Drug: histrelin acetate


Participation Criteria
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Eligibility Criteria
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Key Inclusion Criteria: Male Age 45 or older Histologically confirmed adenocarcinoma of the prostate Disease Staging III or IV Clinical indication for androgen suppression therapy Serum testosterone at least 150 ng/dL at screening WHO Performance Scale 0 to 3 Life expectancy of at least one year Key Exclusion Criteria: Bilateral orchiectomy Prior androgen-ablative therapy within past year Second malignancy with 5 years (except adequately treated non-melanomatous skin cancer or superficial bladder cancer) Spinal cord compression

Ages Eligible for Study
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Minimum Age: 45 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: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: one histrelin acetate 50 mg implant<br>The test product was a histrelin acetate 50 mg hydrogel implant surgically placed subdermally into the inner aspect of the upper arm. | Drug: histrelin acetate<br>* 52 week implant<br>* Other names: Vantas;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Suppression of testosterone to chemical castration levels (<= 50 ng/dL) |  | 52 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| PSA measurements |  | 52 weeks | 
| Pain measurements |  | 52 weeks | 
| QoL outcomes |  | 52 weeks | 

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