Rhenium-188-HEDP vs. Radium-223-chloride in Patients With Advanced Prostate Cancer Refractory to Hormonal Therapy (RaRe)

• ClinicalTrials.gov Identifier: NCT03458559
• Recruitment Status: Active, not recruiting
• First Posted: March 8, 2018
• Last Update Posted: August 29, 2019
• Sponsor: VU University Medical Center
• Information provided by (Responsible Party): A.J.M. van den Eertwegh, VU University Medical Center

Study Description

Brief Summary:

Radium-223 chloride is an alpha-emitting radiopharmaceutical with proven survival benefit in patients with castration-resistant prostate cancer metastatic to bone. Beta-emitting radiopharmaceuticals have proven efficacy for palliating malignant bone pain. Nowadays, rhenium-188-HEDP is used in clinical practice for pain relief and palliative care. Several studies suggest that also rhenium-188-HEDP has the potential to improve overall survival. The purpose of this study is to investigate if treatment with rhenium-188-HEDP results in improvement of overall survival compared to treatment with radium-223-chloride.

Condition or disease	Intervention/treatment	Phase
Prostate Cancer Metastatic to Bone	Drug: Radium-223 chloride; Drug: Rhenium-188-HEDP	Phase 3

Detailed Description:

The main objective of this trial is to compare rhenium-188-HEDP (a beta-emitting radiopharmaceutical) with radium-223-chloride (an alfa-emitting radiopharmaceutical), in patients with castration-resistant prostate cancer metastatic to bone, with overall survival as primary endpoint.

For radium-223-chloride, an overall survival benefit has been proven in a large randomized phase III trial. Although such a trial has never been performed for rhenium-188-HEDP, some trials in literature suggest a survival benefit for rhenium as well.

Rhenium has some advantages compared to radium. Firstly, it is easily available as it can be produced in the hospital. Secondly, the costs of rhenium are significantly lower compared to radium. Lastly, rhenium seems to have a favorable pain response. However, no randomized trials have been performed to confirm this.

Study Design

• Study Type: Interventional (Clinical Trial)
• Estimated Enrollment: 402 participants
• Allocation: Randomized
• Intervention Model: Parallel Assignment

Intervention Model Description

Patients will be randomized between

• radium-223-chloride intravenously, for a total of 6 administrations (every 4weeks)
• rhenium-188-HEDP intravenously for a total of 3 administratrions (every 8 weeks)

• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: Repeated Rhenium-188-HEDP Versus Radium-223-chloride in Patients With Metastatic Castration-resistant Prostate Cancer: The RaRe Study
• Actual Study Start Date: May 16, 2018
• Estimated Primary Completion Date: May 16, 2022
• Estimated Study Completion Date: May 16, 2024

Arms and Interventions

Arm	Intervention/treatment
Active Comparator: Radium-223-chloride; Radium-223-chloride 50kBg/kg, every 4 weeks intravenously, for a total of 6 administrations.	Drug: Radium-223 chloride; Intravenously 50 kBq/kg every 4 weeks. Total: 6 administrations; Other Names: Xofigo; Radium-223 dichloride
Experimental: Rhenium-188-HEDP; Rhenium-188-HEDP 40MBq/kg, every 8 weeks intravenously, for a total of 3 administrations.	Drug: Rhenium-188-HEDP; Intravenously 40 MBq/kg every 8 weeks. Total: 3 administrations; Other Names: Re-188-HEDP; 188Rhenium-etidronate

Outcome Measures

Primary Outcome Measures :

1. Overall survival [ Time Frame: Time from randomization until death due to any cause, an average of 18 months ]
   Time from randomization until death due to any cause,

Secondary Outcome Measures :

1. Time to PSA progression [ Time Frame: Time from randomization to the date of a minimum of rising PSA levels, an average of 8 months (PSA measured at baseline and every 4 weeks). ]
   Time from randomization to the date of a minimum of rising PSA levels with an interval of >1week between each determination
2. Time to total-ALP progression [ Time Frame: Time from randomization to the date of earliest objective evidence of ALP progression, an average of 8 months (ALP measure at baseline and every 4 weeks) ]
   Time from randomization to the date of earliest objective evidence of ALP progression.
3. Clinical progression [ Time Frame: Time from randomization to the date of first clinical progression, an average of 12 months ]
   Time from randomization to the date of first clinical progression.
4. Time to first SRE [ Time Frame: Time from randomization to the date of first skeletal related events, an average of 12 months ]
   Time from randomization to the date of first skeletal related events
5. Quality of life [ Time Frame: Assessed through study completion, an average of 1 year ]
   Measured by the EORTC quality of Life Questionnaire C30
6. Effect on pain [ Time Frame: Assessed through study completion, an average of 1 year ]
   Measured with a visual analogue scale
7. Incremental Cost Effectiveness Ratio (IVER) [ Time Frame: Assessed through study completion, an average of 1 year ]
   Ratio between the difference in costs and the difference in benefits (quality of life of treatment with rhenium-188-HEDP of radium-223-chloride)

Eligibility Criteria

• Ages Eligible for Study: 18 Years and older (Adult, Older Adult)
• Sexes Eligible for Study: Male
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Male, 18 years or older
• Histologically confirmed prostate cancer
• Bone metastases (≥ 6 lesions) showing pathological uptake at bone scintigraphy.
• WHO performance status of ≤2
• Life expectancy of at least 6 months
• Castration-resistant disease: serum testosterone level of ≤ 1.7 nmol per liter (≤50 ng per deciliter) after bilateral orchiectomy or during maintenance treatment consisting of androgen-ablation therapy with a luteinizing hormone-releasing hormone agonist. During study treatment the maintenance androgen-deprivation therapy must be continued.
• Baseline PSA ≥5 ng/ml with evidence of progressively increasing PSA values
• Symptomatic disease with either regular use of analgesic medication or treatment with external-beam radiotherapy for cancer-related bone pain within the previous 12 weeks.
• Progression on or after treatment with docetaxel, or inability to receive docetaxel.
• Adequate renal function (serum creatinine level ≤1.5 x ULN)
• Adequate hematological function defined as absolute neutrophil count ≥ 1.5x10^9/L and platelet count ≥100x 10^9/L)
• Written informed consent

Exclusion Criteria:

• Treatment with chemotherapy within the previous 4 weeks
• Continuation of treatment with abiraterone or enzalutamide
• Previous hemibody external radiotherapy
• Systemic radiotherapy with radioisotopes within the previous 24 weeks
• Malignant lymphadenopathy ≥3cm in the short-axis diameter
• Presence of visceral metastases
• Imminent of established spinal cord compression
• Active uncontrolled bacterial, viral or fungal infection
• History of another malignancy within the last five years except adequately treated basal cell carcinoma of the skin
• Organ allografts requiring immunosuppressive therapy.
• Any serious uncontrolled concommitant disease
• Any psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol and follow-up schedule: those conditions should be discussed with the patient before registration in the trial.

Contacts and Locations

Locations

Netherlands

VU University Medical Center

Amsterdam, Netherlands, 1081 HV

Sponsors and Collaborators

VU University Medical Center

Investigators

• Principal Investigator: Alfons JM van den Eertwegh, Prof.dr.; VU University Medical Center

More Information

Publications:

Palmedo H, Manka-Waluch A, Albers P, Schmidt-Wolf IG, Reinhardt M, Ezziddin S, Joe A, Roedel R, Fimmers R, Knapp FF Jr, Guhlke S, Biersack HJ. Repeated bone-targeted therapy for hormone-refractory prostate carcinoma: tandomized phase II trial with the new, high-energy radiopharmaceutical rhenium-188 hydroxyethylidenediphosphonate. J Clin Oncol. 2003 Aug 1;21(15):2869-75.

Biersack HJ, Palmedo H, Andris A, Rogenhofer S, Knapp FF, Guhlke S, Ezziddin S, Bucerius J, von Mallek D. Palliation and survival after repeated (188)Re-HEDP therapy of hormone-refractory bone metastases of prostate cancer: a retrospective analysis. J Nucl Med. 2011 Nov;52(11):1721-6. doi: 10.2967/jnumed.111.093674. Epub 2011 Oct 5.

Jong JM, Oprea-Lager DE, Hooft L, de Klerk JM, Bloemendal HJ, Verheul HM, Hoekstra OS, van den Eertwegh AJ. Radiopharmaceuticals for Palliation of Bone Pain in Patients with Castration-resistant Prostate Cancer Metastatic to Bone: A Systematic Review. Eur Urol. 2016 Sep;70(3):416-26. doi: 10.1016/j.eururo.2015.09.005. Epub 2015 Sep 19. Review.

• Responsible Party: A.J.M. van den Eertwegh, Principal Investigator, VU University Medical Center
• ClinicalTrials.gov Identifier: NCT03458559
• Other Study ID Numbers: 2017.610
• First Posted: March 8, 2018
• Last Update Posted: August 29, 2019
• Last Verified: August 2019

Individual Participant Data (IPD) Sharing Statement:

• Plan to Share IPD: No

• Studies a U.S. FDA-regulated Drug Product: No
• Studies a U.S. FDA-regulated Device Product: No

Keywords provided by A.J.M. van den Eertwegh, VU University Medical Center:

Bone metastases; Rhenium-188-HEDP; Radium 223-chloride; Survival; Prostate cancer

Additional relevant MeSH terms:

Prostatic Neoplasms; Genital Neoplasms, Male; Urogenital Neoplasms; Neoplasms by Site; Neoplasms; Genital Diseases, Male; Prostatic Diseases; Etidronic Acid; Radium Ra 223 dichloride; Antineoplastic Agents; Bone Density Conservation Agents; Physiological Effects of Drugs