Fractionated Docetaxel and Radium 223 in Metastatic Castration-Resistant Prostate Cancer

NCT ID: NCT03737370

Last Updated: 2025-10-07

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

43 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-01-30

Study Completion Date

2025-09-30

Brief Summary

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The objective of this study is to determine the maximum safe dose of Ra-223 in combination with fractionated (split doses) docetaxel when given to subjects and to determine the best administering dose. The study will look at side effects that may happen while taking the combination treatment. A total of approximately 18 subjects will take part in the dose escalation part of the study and an additional 25 subjects will participate in the expansion cohort. This study will be conducted across four centers in the United States.

Detailed Description

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The primary objective of this study is to assess the safety and toxicity of a fractionated docetaxel schedule in combination with standard Ra-223.

Secondary Objectives include: assessment of progression-free survival, time to treatment failure, overall survival, ability of subjects to complete 6 cycles of the combination therapy, assessment of Prostate Specific Antigen (PSA) kinetics and objective responses (measurable disease), assessment of quality of life and assessment of bone bio-marker outcomes.

The study features a 4-week lead-in period with docetaxel monotherapy to assess for docetaxel intolerance. The lead-in period is then followed by combination therapy with Ra-223 every 4 weeks for 6 cycles in a traditional Phase I dose-escalation design.

A provision has been made to include prophylactic granulocyte colony stimulating factor (G-CSF) cohorts after the lead-in period if neutropenia is the dose limiting toxicity at either dose level.

The investigators hypothesize that the fractionated dosing of docetaxel will significantly mitigate the hematologic toxicity, preserve antineoplastic activity and allow for maintenance of the 4-weekly Ra-223 schedule.

Conditions

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Metastatic Castrate Resistant Prostate Cancer

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

SEQUENTIAL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Dose escalation

There are four dose cohorts (1, 1a, 2, 2a) in this arm and two dose levels of docetaxel (40mg/m\^2 \[level 1\] and 50mg/m\^2 \[level 2\]). Dosing of Radium 223 remains the same in all cohorts (55 KBq/kg given every 28 days for 6 cycles).

Maximum tolerated dose (MTD) of docetaxel will be assessed. MTD is defined as the highest dose-level, among those tested, associated with a rate of less than a 33% dose limiting toxicity (DLT).

Group Type EXPERIMENTAL

Docetaxel

Intervention Type DRUG

Docetaxel will be administered every 2 weeks (on Day 1 and Day 15 of a 28 day cycle). Fractionated dosing dependent on cohort.

Radium 223

Intervention Type RADIATION

Radium 223 will be delivered every 28 days (on day 1) for 6 cycles.

Dose expansion

If the maximum tolerated dose (MTD) of docetaxel is found in arm 1, this dose level will be expanded to include an additional 25 subjects to confirm the safety and explore the preliminary anti-cancer effect. If the MTD is not identified, the study will be stopped and the expansion cohort will not be accrued.

Group Type EXPERIMENTAL

Docetaxel

Intervention Type DRUG

Docetaxel will be administered every 2 weeks (on Day 1 and Day 15 of a 28 day cycle). Fractionated dosing dependent on cohort.

Radium 223

Intervention Type RADIATION

Radium 223 will be delivered every 28 days (on day 1) for 6 cycles.

Interventions

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Docetaxel

Docetaxel will be administered every 2 weeks (on Day 1 and Day 15 of a 28 day cycle). Fractionated dosing dependent on cohort.

Intervention Type DRUG

Radium 223

Radium 223 will be delivered every 28 days (on day 1) for 6 cycles.

Intervention Type RADIATION

Other Intervention Names

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Fractionated Docetaxel Ra-223

Eligibility Criteria

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Inclusion Criteria

1. Histologically or cytologically confirmed adenocarcinoma of the prostate
2. Documented metastatic castration resistant disease with PSA progression, radiographic progression, or both, despite medical or surgical castration
3. Two or more bone metastases detected on skeletal scintigraphy
4. Eligible for docetaxel chemotherapy
5. ECOG Performance Status 0-2
6. Adequate organ function:

1. Hemoglobin \> 10 g/dL
2. Absolute Neutrophil Count ≥ 1,500 K/mL
3. Platelet count ≥ 150,000 x 10\^9/L
4. Total bilirubin ≤ 1.5x upper limit of normal range, excluding Gilbert syndrome
5. Serum AST ≤ 1.5 x upper limit of normal range
6. Serum ALT ≤ 1.5 x upper limit of normal range
7. Estimated glomerular filtration rate (GFR) \> 30mL/min
8. Ongoing castration (androgen deprivation therapy or prior orchiectomy)
9. Male subjects with female sexual partners of childbearing potential must agree to use at least one highly effective methods of birth control.
10. Ability to understand and willingness to sign an informed consent form prior to initiation of any study procedures.
11. Age ≥ 18 years

Exclusion Criteria

1. Prior radionuclide therapy for CRPC
2. Prior docetaxel for CRPC. (Permitted if given for castration sensitive disease \> 6 months prior).
3. Antiandrogen therapy within 4 weeks of enrollment. However, patients with primary failure of secondary anti-androgen therapy OR symptomatic progression, objective progression and/or biochemical evidence of rising PSA less than 4 weeks after discontinuation of anti-androgen therapy will not have anti-androgen withdrawal responses and will not be excluded.
4. Preexisting peripheral neuropathy grade 2 or higher.
5. Other serious medical condition as judged by the investigator.
6. Active second malignancy that requires therapy.
7. Known brain or leptomeningeal metastases
8. Concurrent enrollment in any other investigational anticancer therapy
9. Treatment with any myelosuppressive agent within 30 days of enrollment
10. Presence of bulky visceral metastases, defined as any of the following:

1. ≥ 4 lung lesions (at least 1cm each in size in the longest diameter) or pulmonary lymphangitic metastasis
2. Liver metastases with sum of lesion diameters totaling ≥ 5cm
11. Evidence of neuroendocrine or small cell differentiation on prior biopsy
12. History of severe hypersensitivity reactions to docetaxel or to drugs formulated with polysorbate 80
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Bayer

INDUSTRY

Sponsor Role collaborator

Lahey Clinic

OTHER

Sponsor Role collaborator

Henry Ford Hospital

OTHER

Sponsor Role collaborator

Ohio State University Comprehensive Cancer Center

OTHER

Sponsor Role collaborator

Tufts Medical Center

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Paul Mathew, MD

Role: PRINCIPAL_INVESTIGATOR

Tufts Medical Center

Locations

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Lahey Hospital & Medical Center

Boston, Massachusetts, United States

Site Status

Tufts Medical Center

Boston, Massachusetts, United States

Site Status

Henry Ford Health System

Detroit, Michigan, United States

Site Status

Ohio State University Comprehensive Cancer Center

Columbus, Ohio, United States

Site Status

Countries

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United States

References

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Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Related Links

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Other Identifiers

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IIR-US-2016-3279

Identifier Type: -

Identifier Source: org_study_id

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