Combination Therapy for Metastatic Prostate Cancer

Age: 18+

Sex: Male

Trial Phase: Phase 2

Sponsor: University of Michigan Rogel Cancer Center

Must be taking: Androgen deprivation therapy

Must not be taking: Strong CYP3A inducers, Strong CYP3A inhibitors

Disqualifiers: Prior orchiectomy, Brain metastasis, Hepatitis, others

No Placebo Group All trial participants will receive the active study treatment (no placebo)

Prior Safety Data This treatment has passed at least one previous human trial

Compensation: Varies

Number of Visits: Unknown

Duration: 24 months

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial explores a combination treatment for men with a specific type of prostate cancer that has spread but remains sensitive to hormone therapy. Researchers aim to determine the safety and effectiveness of using radiation alongside hormone therapy and chemotherapy, including drugs like Abiraterone (Zytiga or Yonsa, a hormone therapy) and Olaparib (Lynparza, a chemotherapy drug). Men who have undergone prostate surgery or radiation and have been diagnosed with oligometastatic prostate cancer (cancer that has spread to 1-5 areas) might be suitable for this study. As a Phase 2 trial, this research focuses on assessing the treatment's effectiveness in an initial, smaller group, offering participants a chance to contribute to significant advancements in prostate cancer treatment.

Do I need to stop taking my current medications to join the trial?

The trial requires a washout period (time without taking certain medications) for specific drugs. If you are taking strong or moderate CYP3A inducers or inhibitors, you will need to stop them for a certain period before starting olaparib. The washout period is 5 weeks for phenobarbital or enzalutamide and 3 weeks for other inducers, and 2 weeks for inhibitors.

Is there any evidence suggesting that this trial's treatments are likely to be safe?

Research shows that combining olaparib and abiraterone is generally well-tolerated by patients. One study found that these drugs effectively lower PSA levels, a marker used to monitor prostate cancer. The most common side effects included nausea, tiredness, and high blood pressure, but most patients managed these well.

Abiraterone is often used with prednisone and hormone therapy (ADT) to treat prostate cancer. It lowers testosterone, helping to control cancer growth. Previous studies have shown that its side effects, such as joint pain and swelling, are usually mild.

Olaparib, a newer treatment also approved for some other cancers, is considered safe when used as directed. It may cause side effects like low red blood cell count and decreased appetite, but these are generally not severe.

In summary, while some side effects exist, research indicates that this combination of treatments is safe and usually well-tolerated by patients. ^{1 2 3 4 5}

Why are researchers excited about this trial's treatments?

Researchers are excited about this combination therapy for metastatic prostate cancer because it incorporates a unique mix of treatments that target cancer in multiple ways. Unlike standard treatments that may focus solely on hormone therapy or chemotherapy, this approach combines Abiraterone and Androgen Deprivation Therapy (ADT) with Olaparib and radiation. Olaparib, in particular, is a standout as it’s a PARP inhibitor, which helps prevent cancer cells from repairing their DNA, potentially leading to their death. This multi-pronged attack aims not just to control the cancer but to significantly limit its spread, offering hope for more comprehensive management of the disease.

What evidence suggests that this trial's treatments could be effective for prostate cancer?

Research has shown that combining abiraterone with prednisone helps patients with advanced prostate cancer live longer. Studies indicate that this combination significantly slows the disease's progression. In this trial, participants will receive a combination of treatments, including abiraterone, prednisone, androgen deprivation therapy (ADT), external beam radiotherapy, and olaparib. ADT effectively shrinks tumors by reducing testosterone levels. External beam radiotherapy can relieve symptoms and improve survival rates. Olaparib, a drug used for certain genetic profiles, has shown promise in extending the lives of prostate cancer patients. These treatments work together to attack the cancer in different ways, potentially increasing their overall effectiveness. ^{6 7 8 9 10}

Who Is on the Research Team?

Zachery R. Reichert

Principal Investigator

University of Michigan Rogel Cancer Center

Are You a Good Fit for This Trial?

Men with castration sensitive oligometastatic prostate cancer, who are medically fit for radiotherapy and have had prior prostate surgery or radiation. They must not have more than 5 metastatic sites suitable for radiation, no brain metastases, and an ECOG performance status of ≤1. Participants need normal organ function, a rising PSA level post-treatment, and agree to use contraception.

Inclusion Criteria

My organ and bone marrow functions are normal as tested within the last 28 days.

I am fully active and can carry on all my pre-disease activities without restriction.

I am a candidate for hormone therapy for my cancer, as advised by my oncologist.

Exclusion Criteria

Life expectancy ≤3 years in view of treating provider

I have had surgery to remove one or both of my testicles.

I have been diagnosed with MDS, AML, or have symptoms that suggest these conditions.

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Treatment

Participants receive focal radiation with pulsed systemic therapy of Abiraterone, ADT, and Lynparza

24 months

Follow-up

Participants are monitored for safety and effectiveness after treatment

12 months

Long-term follow-up

Participants are monitored for long-term outcomes and adverse events

36 months

What Are the Treatments Tested in This Trial?

Interventions

• Abiraterone
• Androgen Deprivation Therapy (ADT)
• External Beam Radiotherapy
• Olaparib
• Prednisone

Trial Overview

The trial is testing the combination of focal radiation therapy with systemic hormone therapy (ADT) and chemotherapy drugs Abiraterone and Olaparib in men with limited spread prostate cancer. It's a phase 2 study aiming to see if this treatment can effectively manage the disease.

How Is the Trial Designed?

Group I: Abiraterone, ADT, Radiation and Olaparib Experimental Treatment 5 Interventions

Abiraterone, ADT, radiation to all metastases and Olaparib.

Abiraterone is already approved in United States, European Union, Canada, Japan for the following indications:

Approved in United States as Zytiga for:

• Metastatic castration-resistant prostate cancer (mCRPC)
• Metastatic high-risk castration-sensitive prostate cancer (mCSPC)

Approved in European Union as Zytiga for:

• Metastatic castration-resistant prostate cancer (mCRPC)
• Metastatic high-risk castration-sensitive prostate cancer (mCSPC)

Approved in Canada as Zytiga for:

• Metastatic castration-resistant prostate cancer (mCRPC)
• Metastatic high-risk castration-sensitive prostate cancer (mCSPC)

Approved in Japan as Zytiga for:

• Metastatic castration-resistant prostate cancer (mCRPC)
• Metastatic high-risk castration-sensitive prostate cancer (mCSPC)

Who Is Running the Clinical Trial?

University of Michigan Rogel Cancer Center

Lead Sponsor

Trials

303

Recruited

20,700+

Published Research Related to This Trial

Oral abiraterone acetate (Zytiga®) significantly improves overall survival and progression-free survival in patients with metastatic castration-resistant prostate cancer (CRPC) when used with prednisone, compared to a placebo.

The treatment is specifically effective for patients who have already undergone docetaxel-containing chemotherapy, highlighting its role as a subsequent therapy in advanced prostate cancer management.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Abiraterone acetate: a guide to its use in metastatic castration-resistant prostate cancer. Scott, LJ., Yang, LPH., Lyseng-Williamson, KA.[2021]

In a Swedish observational study of 119 patients with metastatic castration-resistant prostate cancer (mCRPC), abiraterone acetate treatment resulted in similar overall survival rates compared to those seen in the pivotal clinical trial, despite a shorter median treatment duration of 5.6 months versus 7.3 months in the trial.

The findings suggest that while Swedish patients may have characteristics that could limit their treatment benefits, they still achieve comparable survival outcomes, indicating a potentially more cost-effective use of abiraterone in clinical practice.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Value of treatment in clinical trials versus the real world: the case of abiraterone acetate (Zytiga) for postchemotherapy metastatic castration-resistant prostate cancer patients in Sweden. Svensson, J., Andersson, E., Persson, U., et al.[2017]

Adding abiraterone acetate plus prednisone/prednisolone (AAP) to androgen deprivation therapy (ADT) significantly reduces the risk of death in men with metastatic hormone-sensitive prostate cancer (mHSPC) by 38%, translating to a 14% absolute improvement in overall survival over three years, based on data from two major trials involving 82% of participants.

The addition of AAP also leads to a 55% reduction in the risk of clinical or radiological progression-free survival, with a 28% absolute improvement at three years, although there is an increased risk of certain grade III-IV toxicities, particularly cardiac and hepatic, without an increase in overall mortality.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Adding abiraterone to androgen deprivation therapy in men with metastatic hormone-sensitive prostate cancer: A systematic review and meta-analysis. Rydzewska, LHM., Burdett, S., Vale, CL., et al.[2023]

In a phase 3 trial involving 1199 patients, the addition of abiraterone acetate and prednisone to androgen-deprivation therapy significantly improved overall survival, with a median survival not reached in the abiraterone group compared to 34.7 months in the placebo group.

The study also showed that patients receiving abiraterone had a median radiographic progression-free survival of 33.0 months, compared to 14.8 months in the placebo group, indicating a strong benefit in delaying disease progression.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Abiraterone plus Prednisone in Metastatic, Castration-Sensitive Prostate Cancer. Fizazi, K., Tran, N., Fein, L., et al.[2022]

Abiraterone acetate combined with prednisone significantly improves overall survival (34.7 months vs 30.3 months) and radiologic progression-free survival (16.5 months vs 8.3 months) in patients with metastatic castration-resistant prostate cancer compared to placebo.

The treatment is generally well-tolerated, with manageable side effects primarily related to mineral corticoid excess, and it also enhances the perceived quality of life for patients.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

[Abiraterone in castration resistant prostate cancer.] Juárez Soto, A., Caballero Cobos, R., Campanario Pérez, R., et al.[2018]

Oral abiraterone acetate (Zytiga®) effectively inhibits androgen biosynthesis, which is crucial for the progression of metastatic castration-resistant prostate cancer (mCRPC), and has been shown to prolong overall survival and radiographic progression-free survival in large phase 3 trials.

In combination with prednisone, abiraterone acetate has a manageable safety profile and is a convenient once-daily treatment option, making it a significant first-line therapy for men with mCRPC.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Abiraterone Acetate: A Review in Metastatic Castration-Resistant Prostrate Cancer. Scott, LJ.[2019]

Abiraterone is an effective treatment for metastatic castration-resistant prostate cancer (CRPC) as it targets both adrenal and tumor androgen production, addressing the issue of residual tumor androgens that contribute to cancer progression.

Phase III data supports its approval, and there is emerging evidence suggesting that abiraterone may also be beneficial in earlier stages of prostate cancer, indicating its potential for broader use beyond just CRPC.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Practical guide to the use of abiraterone in castration resistant prostate cancer. Mostaghel, EA., Lin, DW.[2023]

Abiraterone acetate, in combination with prednisone, received full FDA approval for treating metastatic castration-resistant prostate cancer (mCRPC) based on the COU-AA-302 trial, which involved 1,088 patients and showed a significant improvement in radiographic progression-free survival (rPFS) compared to placebo (8.3 months vs. not reached).

The trial also indicated a favorable trend in overall survival (OS) for patients receiving abiraterone acetate, although it did not reach statistical significance, confirming the drug's efficacy and safety profile consistent with previous studies.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Abiraterone acetate in combination with prednisone for the treatment of patients with metastatic castration-resistant prostate cancer: U.S. Food and Drug Administration drug approval summary. Kluetz, PG., Ning, YM., Maher, VE., et al.[2018]

Intratumoral androgen biosynthesis is crucial in the development of metastatic castration-resistant prostate cancer (mCRPC), suggesting that these tumors continue to rely on androgens for growth even after androgen deprivation therapy.

A novel metabolite of abiraterone, D4A, shows strong antitumor effects by inhibiting androgen biosynthesis and blocking the androgen receptor, indicating its potential as a new treatment option for mCRPC, especially in cases resistant to existing therapies like enzalutamide.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Current advances in intratumoral androgen metabolism in castration-resistant prostate cancer. Penning, TM., Tamae, D.[2018]

In a real-world study involving 1108 patients with metastatic castration-resistant prostate cancer (mCRPC), abiraterone acetate plus prednisone (AAP) was found to be effective as both first-line and second-line treatment, with median overall survival of 27.1 months for first-line and 23.4 months for second-line therapy.

The treatment was well tolerated across all patient subgroups, including those with cardiovascular comorbidities, and no unexpected adverse events were reported, indicating a favorable safety profile.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Real-World Safety and Efficacy Outcomes with Abiraterone Acetate Plus Prednisone or Prednisolone as the First- or Second-Line Treatment for Metastatic Castration-Resistant Prostate Cancer: Data from the Prostate Cancer Registry. Bjartell, A., Lumen, N., Maroto, P., et al.[2021]

In a study involving 1919 patients with metastatic prostate cancer, the addition of abiraterone acetate to standard androgen deprivation therapy significantly improved overall survival, with a median survival of 76.6 months compared to 45.7 months for standard care alone.

Combining both abiraterone and enzalutamide did not provide additional survival benefits over abiraterone alone, and it was associated with higher rates of severe side effects, suggesting that this combination should be avoided in long-term treatment plans.

NCBI (Pubmed)

pubmed.ncbi.nlm.nih.gov

Abiraterone acetate plus prednisolone with or without enzalutamide for patients with metastatic prostate cancer starting androgen deprivation therapy: final results from two randomised phase 3 trials of the STAMPEDE platform protocol. Attard, G., Murphy, L., Clarke, NW., et al.[2023]

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