Evaluate the Effects of GPI 1485 on Erectile Function Following Bilateral Nerve-Sparing Prostatectomy
- Conditions
- ImpotenceProstate Cancer
- Registration Number
- NCT00090376
- Lead Sponsor
- Eisai Inc.
- Brief Summary
In this phase II study, an investigative (not approved by the FDA) drug called GPI 1485 is being assessed to see if it can help preserve erectile function after prostatectomy.
- Detailed Description
This drug has been tested in animals, and was shown to protect nerves from damage and to regrow damaged nerves in these animal studies. Participants will receive either GPI 1485 or a placebo (inactive pill). Participants will begin study medication 3 full days prior to their scheduled surgery.
GPI 1485 will be supplied as an oral tablet formulation to men who are candidates for bilateral nerve-sparing prostatectomies. Participants randomly assigned to receive GPI 1485 will be required to take four tablets four times a day by mouth.
GPI 1485 matching placebo will also be supplied as an oral tablet formulation. Participants randomly assigned to placebo will be required to take 4 placebo tablets four times a day by mouth.
Viagra® will be supplied as oral tablets beginning 1 month post-surgery. Patients can begin Viagra® 1 month post-surgery and may continue use until the end of the study, as needed.
The duration of this study is 12 months which includes 5 office visits to your doctor in addition to the surgery day. During this study you will also have other clinical evaluations including a physical exam, blood work, ECG (tracing of your heart rhythm) and urinalysis.
Participants enrolled in this study will also carry a handheld diary that is loaded with special protocol-specific software, which will be referred to as the patient experience diary (PED). Over the duration of this study, participants will complete their questionnaires and answer questions about their medication compliance in the electronic PED.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- Male
- Target Recruitment
- 240
-
Clinical diagnosis of localized prostate carcinoma and scheduled to undergo curative surgical resection via bilateral nerve sparing procedure.
-
Localized prostate cancer is defined as:
- Gleason score <=7 (<=3 + <=4)
- PSA <=10 off of finasteride (Proscar®) and dutasteride (Avodart®)
- <=T2a stage disease
-
Motivated males, 40 to 69 years of age inclusive, and in the opinion of the investigator, are currently in a monogamous, sexually active relationship.
-
Males that have erectile function (EF) (without the use of pharmacotherapy within 30 days prior to screening assessment).
-
EF is defined as a score of >=26 on the EF domain of the IIEF questionnaire based on patient experiences over the 4 weeks prior to biopsy.
-
Body Mass Index (BMI) within the 18-34.9 kg/m2 range.
-
Able to swallow whole tablets equivalent to capsule size 0.
-
Available for protocol-specified visits and procedures.
-
Informed written consent must be provided prior to any study-specific procedures.
- Recent history, within 6 months before screening, of drug or alcohol abuse.
- History of peripheral neuropathy.
- History of acute or chronic depression that in the opinion of the investigator may interfere with protocol-specified efficacy measurements.
- History of diabetes that requires use of insulin or oral hypoglycemic agents, myocardial infarction, or cerebrovascular accident.
- History of spinal trauma or surgery to the brain or spinal cord.
- Any medical disability or laboratory abnormality (e.g., serum creatinine > 2.0 mg/dL) that, in the opinion of the Investigator, may interfere with the protocol-specified safety and efficacy measurements, present an unacceptable risk to the patient's well-being, or compromise the patient's ability to provide informed consent.
- History of pelvic radiation therapy (external beam radiation or brachytherapy).
- Concomitant use of hormonal therapy, vasodilators (nitrates), dutasteride (Avodart®) or finasteride (Proscar®) within the 30 days prior to biopsy and throughout the study.
- Concomitant use of therapeutic agents to treat ED other than those specified in the protocol is not permitted starting at least 30 days prior to biopsy and continuing throughout the study.
- Previous exposure to GPI 1485 (previously AMG-474-00).
- Treatment with an investigational agent within the 30 days before screening or scheduled to receive an investigational agent other than that specified by this protocol during the course of this study.
- Any contraindication to Viagra® use
- Unable to stop the use of inducers or inhibitors of cytochrome P450 (CYP) 3A4 from Baseline until the end of the study.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Primary Outcome Measures
Name Time Method
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (25)
The University of Texas MD Anderson Cancer Center
🇺🇸Houston, Texas, United States
Henry Ford Health System, Vattikuti Institute for Urology
🇺🇸Detroit, Michigan, United States
Johns Hopkins Hospital
🇺🇸Baltimore, Maryland, United States
Hackensack University Medical Center
🇺🇸Hackensack, New Jersey, United States
Vanderbilt Medical Center
🇺🇸Nashville, Tennessee, United States
HOPE Research Institute, LLC
🇺🇸Phoenix, Arizona, United States
Connecticut Surgical Group
🇺🇸Hartford, Connecticut, United States
University of Michigan
🇺🇸Ann Arbor, Michigan, United States
Carolina Urologic Research Center
🇺🇸Myrtle Beach, South Carolina, United States
Center for Urological Research
🇺🇸La Mesa, California, United States
Connecticut Urological Research at Grove Hill
🇺🇸New Britain, Connecticut, United States
The University of Texas Health Science Center at San Antonio
🇺🇸San Antonio, Texas, United States
Madigan Army Medical Center
🇺🇸Tacoma, Washington, United States
Tulane University Health Sciences Center
🇺🇸New Orleans, Louisiana, United States
Stanford University Medical Center
🇺🇸Stanford, California, United States
Carolinas Health Care System McKay Urology
🇺🇸Charlotte, North Carolina, United States
PPS Clinical Research, St. Louis
🇺🇸St. Louis, Missouri, United States
NYU Urology Associates
🇺🇸New York, New York, United States
Columbia University
🇺🇸New York, New York, United States
Memorial Sloan-Kettering Cancer Center
🇺🇸New York, New York, United States
Duke University Medical Center
🇺🇸Durham, North Carolina, United States
Urological Associates of Lancaster, Ltd.
🇺🇸Lancaster, Pennsylvania, United States
The Cleveland Clinic Foundation
🇺🇸Cleveland, Ohio, United States
Virginia Mason Medical Center
🇺🇸Seattle, Washington, United States
Washington University School of Medicine
🇺🇸St. Louis, Missouri, United States