Hypo-fractionated Radiation Therapy With or Without Androgen Suppression for Intermediate Risk Prostate Cancer

Prostate Cancer Clinical Trial

Official title:

Phase III Study of Image Guided Radiation Therapy With or Without Androgen Suppression for Intermediate Risk Adenocarcinoma of the Prostate

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT01492972
• Other study ID #: GU003-10
• Status: Recruiting
• Phase: Phase 3
• Start date: January 2012

Study information

• Verified date: May 2024
• Source: Proton Collaborative Group
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to compare the effects, good and/or bad of two treatment methods on subjects and their cancer. Proton beam radiation therapy is one of the treatments for men with prostate cancer who have localized disease. The benefit of the combination with androgen suppression is not completely understood. This study will compare the use of hypofraction proton therapy (28 treatments) alone to proton therapy with androgen suppression therapy.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 192
• Est. primary completion date: December 2025
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Histologically confirmed prostate adenocarcinoma (within 365 days of randomization) at intermediate risk for reoccurrence determined by at least one of the following: Gleason Score 7, PSA > = 10 and < = 20, T stage T2b - T2c
• Clinical stages T1-T2c N0 M0 as staged by the treating investigator. (AJCC Criteria 7th Ed.- appendix III).
• Histological evaluation of prostate biopsy with assignment of a Gleason score to the biopsy material; Gleason score must be in the range of 2-7. > 6 cores are strongly recommended.
• PSA values < = 20 ng/ml within 90 days prior to randomization. Obtained prior to biopsy or at least 21 days after prostate biopsy.
• ECOG performance status 0-1 (appendix II) assessed within 90 days of randomization.
• Patients must sign IRB approved study specific informed consent.
• Patients must complete all required pre-entry tests listed in section 4.0 within the specified time frames.
• Patients must be able to start treatment within 56 days of randomization.
• Patients must be at least 18 years old.
• For brachytherapy, an IPSS = 21, or = 17 if patient is on medications to improve urination.
• For brachytherapy, prostate volume must be less than 55cc prior to AS.

Exclusion Criteria:

• Pelvic lymph nodes > 1.5 cm in greatest dimension unless the enlarged lymph node is biopsied and negative.
• Previous prostate cancer surgery to include: prostatectomy, hyperthermia and cryosurgery.
• Previous pelvic radiation for prostate cancer.
• Previous androgen suppression therapy for prostate cancer.
• Active rectal diverticulitis, Crohn's disease affecting the rectum or ulcerative colitis (non-active diverticulitis and Crohn's disease not affecting the rectum are allowed).
• Prior systemic chemotherapy for prostate cancer.
• History of proximal urethral stricture requiring dilatation.
• Current and continuing anticoagulation with warfarin sodium (Coumadin), heparin, low- molecular weight heparin, Clopidogrel bisulfate (Plavix), or equivalent (unless it can be stopped to manage treatment related toxicity or to have a biopsy if needed).
• Major medical, addictive or psychiatric illness which in the investigator's opinion, will prevent the consent process, completion of the treatment and/or interfere with follow-up. (Consent by legal authorized representative is not permitted for this study).
• Evidence of any other cancer within the past 5 years and < 50% probability of a 5 year survival. (Prior or concurrent diagnosis of basal cell or non-invasive squamous cell cancer of the skin is allowed).
• History of myocardial infarction within the last 6 months.

Related Conditions & MeSH terms

• Prostate Cancer
• Prostatic Neoplasms

Intervention

Radiation:
• Radiation
Consists of: Conformal Proton Radiation Dose: 2.5 Gy (RBE) five days a week in 28 treatments over 5.5-6.5 weeks (total dose: 70 Gy (RBE)) High Dose Radiation with IMRT alone: 1.8 Gy five days a week in 45 treatments over 9-10 weeks (total dose: 81 Gy) Intraoperative LDR Brachytherapy and IMRT: 100Gy Pad103 implant and IMRT 1.8 Gy five days a week in 25 treatments over 5-6 weeks (total dose: 45 Gy)

Drug:
• Androgen Suppression Therapy
Androgen suppression will begin 8 - 10 weeks prior to the start of RT for a total of 6 (+/- 2) months. Luteinizing Hormone-Releasing Hormone (LHRH) agonist therapy will consist of analogs approved by the FDA (or by Health Canada for Canadian institutions)

Locations

Country	Name	City	State
United States	Hampton University Proton Therapy Institute	Hampton	Virginia
United States	Oklahoma Proton Center	Oklahoma City	Oklahoma
United States	Mayo Clinic	Scottsdale	Arizona
United States	Northwestern Medicine Chicago Proton Center	Warrenville	Illinois

Sponsors (1)

Lead Sponsor	Collaborator
Proton Collaborative Group

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Morbidity Outcomes	To determine if androgen suppression along with radiation therapy will result in a higher freedom from failure (FFF) than radiation therapy without androgen suppression.; Freedom from failure (FFF): The events for FFF will be the first occurrence of clinical failure (local recurrence, regional recurrence, or distant metastasis), biochemical failure by the Phoenix definition (PSA = 2 ng/ml over the current nadir PSA) (45) discounting bounces per investigator discretion, or the start of salvage therapy including androgen suppression	after the initial 100 patients have had a median follow up of at least three years and then every year.
Secondary	Frequency and severity of grade 2 or higher GU and GI toxicity	Assessment of grade 2 or higher GU and GI toxicity using CTCAE 4.0 criteria	At 6 months
Secondary	Frequency and severity of GI and GU toxicity		At 3 years
Secondary	Incidence of quality of life issues		At completion of radiation therapy
Secondary	Incidence of Freedom from biochemical failure (FFBF)		At 5 years
Secondary	Incidence of clinical failure: local and/or distant		At 5 years
Secondary	Incidence of salvage Androgen Suppression use (SAD)		At 5 years
Secondary	Incidence of progression free survival: using clinical, biochemical and SAD as events		At 5 years
Secondary	Incidence of overall survival		At 5 years
Secondary	Incidence of disease-specific survival		At 5 years
Secondary	Correlate pathologic and radiologic findings with outcomes		At 5 years
Secondary	Correlate PSA and free PSA levels with outcomes		At 5 years
Secondary	Correlate testosterone levels and variation with proton therapy and outcomes		At 5 years
Secondary	Prospectively collect information that will help to define dose-volume relationships of normal structures with acute and chronic toxicity		At 3 years