Neoplasms

Urinary Tract, Sexual Organs, and Pregnancy Conditions

All Conditions

Prostatic Neoplasms

Genital Neoplasms, Male

Urogenital Neoplasms

Genital Diseases

Genital Diseases, Male

Urogenital Diseases

Prostatic Diseases

Male Urogenital Diseases

All Drugs and Chemicals

Antineoplastic Agents

Androgens

Androgen Antagonists

Bicalutamide

Flutamide

Nonsteroidal Anti-Androgens

As the study investigates the effect of a drug given concomitantly to radiotherapy, all patients will be treated with the same treatment technique and target dose. The preferred treatment technique is intensity modulated radiotherapy (IMRT) + A GnRH-agonist will be given for the duration selected for each patient.

A non-steroidal anti-androgen (e. g. flutamide, bicalutamide) will be given orally one week before the first injection of the GnRH agonist and will be continued for no longer than 8 weeks to protect against flare.

Dose may vary due to availability of different brand names and pharmaceutical forms The start of antiandrogen must be registered as day 1 of treatment in the GnRH agonist arm.

As the study investigates the effect of two drugs given concomitantly to radiotherapy, all patients will be treated with the same treatment technique and target dose. The preferred treatment technique is intensity modulated radiotherapy (IMRT) +a GnRH antagonist will be given for a predefined duration of 18, 24, or 36 months as per institution policy.

Each institution has to adhere to the chosen duration of treatment for all patients throughout the study

a GnRH antagonist will be given for a predefined duration of 18, 24, or 36 months as per institution policy

Degarelix

A non-steroidal anti-androgen (e. g. flutamide, bicalutamide) will be given orally one week before the first injection of the GnRH agonist and will be continued for no longer than 8 weeks to protect against flare.Dose may vary due to availability of different brand names and pharmaceutical forms The start of antiandrogen must be registered as day 1 of treatment in the GnRH agonist arm.

approved GnRH agonist

.As the study investigates the effect of two drugs given concomitantly to radiotherapy, all patients will be treated with the same treatment technique and target dose. The preferred treatment technique is intensity modulated radiotherapy (IMRT)

Radiotherapy

Dirk Boehmer, MD, PhD

Pedro Lara, MD, PhD

Thomas Zilli, MD, PhD

Martin Spahn, MD, PhD

The primary objective of the trial is to assess if GnRH antagonists in combination with external beam radiation therapy improve progression free survival (progression that can be biological, clinical, or death) compared to GnRH agonists in combination with external beam radiation therapy.

Secondary objectives include:

* documentation of effect of GnRH antagonists on clinically significant cardiovascular events in the subgroup of patients at high risk of such events at baseline;
* documentation of side effects and quality of life, I-PSS and urinary tract infections;
* assessment of relative treatment effect on secondary efficacy endpoints (clinical progression, time to next line of systemic therapy, time on therapy, overall and cancer specific survival) and on PSA at 6 months after end of RT.

Phase IIIb randomized stratified open-label comparative 2-arm superiority study with a pre-set non-inferiority boundary.

Registered GnRH antagonists, degarelix, will be given at the dose of 240 mg given as two subcutaneous injections of 120 mg at a concentration of 40 mg/mL on day 1, followed by 80 mg given as one subcutaneous injection at a concentration of 20 mg/mL every 28 days (±2 days).

External beam radiotherapy (EBRT) to a total dose of 78-80 Gy, delivered as one daily fraction, five days a week, started between d1 and months 6 of the androgen deprivation therapy as per institution policy. The irradiation is the same as in the reference therapy arm.

The minimum duration of androgen deprivation with GnRH agonist or antagonist therapy is 18 months.

For each patient, the duration of therapy must be elected upfront by the treating physician among three possible options: 18, 24 or 36 months. The institution shall also declare upfront the duration of the neoadjuvant treatment they intend to deliver to each patient (between 0 and 6 months).

The primary endpoint is progression-free survival defined as the time in days from randomization to death, clinical or biochemical progression, whichever comes first.

Where

* PSA progression based on Phoenix definition, i.e. a rise by 2 ng/mL or more above the nadir PSA (Ref. 17) confirmed by a second value measured minimum 3 months later
* Clinical progression is defined as onset of obstructive symptoms requiring local treatment and demonstrated to be caused by cancer progression or evidence of metastases detected by clinical symptoms and confirmed by imaging
* Start of another line of systemic therapy in absence of progression
* Death due to any cause

Secondary endpoints:

* Clinical progression-free survival
* Time to next systemic anticancer therapy (including secondary hormonal manipulation)
* Proportion of patients switching from GnRH antagonists to GnRH agonists and total effective duration of treatment with the originally allocated drug.
* Overall survival
* Cancer specific survival
* PSA at six months after completion of RT Safety will be scored by the CTCAE version 4.0. The major safety endpoints in this study are
* the incidence of clinical cardiovascular events - CCE (i.e. arterial embolic or thrombotic events, hemorrhagic or ischemic cerebrovascular conditions, myocardial infarction, and other ischemic heart disease) in patients who had cardiovascular events before entering the trial and in those without such events.
* Incidence of urinary tract infection

Trial Comparing Irradiation Plus Long Term Adjuvant Androgen Deprivation With GnRH Antagonist Versus GnRH Agonist Plus Flare Protection in Patients With Very High Risk Localized or Locally Advanced Prostate Cancer

Phase IIIb Randomized Trial Comparing Irradiation Plus Long Term Adjuvant Androgen Deprivation With GnRH Antagonist Versus GnRH Agonist Plus Flare Protection in Patients With Very High Risk Localized or Locally Advanced Prostate Cancer. A Joint Study of the EORTC ROG and GUCG

The primary endpoint is progression-free survival defined as the time in days from randomization to death, clinical or biochemical progression, whichever comes first.

Where

* PSA progression based on Phoenix definition, i.e. a rise by 2 ng/mL or more above the nadir PSA (Ref. 17) confirmed by a second value measured minimum 3 months later
* Clinical progression is defined as onset of obstructive symptoms requiring local treatment and demonstrated to be caused by cancer progression or evidence of metastases detected by clinical symptoms and confirmed by imaging
* Start of another line of systemic therapy in absence of progression
* Death due to any cause

♦ the incidence of clinical cardiovascular events - CCE (i.e. arterial embolic or thrombotic events, hemorrhagic or ischemic cerebrovascular conditions, myocardial infarction, and other ischemic heart disease) in patients who had cardiovascular events before entering the trial and in those without such events.

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Trial Comparing Irradiation Plus Long Term Adjuvant Androgen Deprivation With GnRH Antagonist Versus GnRH Agonist Plus Flare Protection in Patients With Very High Risk Localized or Locally Advanced Prostate Cancer	NCT02799706	Prostate Cancer	Degarelix approved GnRH a... Radiotherapy	18 Years - 80 Years	European Organisation for Research and Treatment of Cancer - EORTC
Trial Comparing Irradiation Plus Long Term Adjuvant Androgen Deprivation With GnRH Antagonist Versus GnRH Agonist Plus Flare Protection in Patients With Very High Risk Localized or Locally Advanced Prostate Cancer	NCT02799706	Prostate Cancer	Degarelix approved GnRH a... Radiotherapy	18 Years - 80 Years	European Organisation for Research and Treatment of Cancer - EORTC

Spots Global Cancer Trial Database for approved gnrh agonist