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Prostate CancerPhase 2NCT01804465

Sipuleucel-T With Immediate vs. Delayed Cytotoxic T-Lymphocyte-Associated Protein 4 (CTLA-4) Blockade for Prostate Cancer

A Phase 2 study testing SipT Treatment and Ipilimumab in people with Prostate Cancer, run by University of California, San Francisco at 2 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to find out what effects taking ipilimumab, as an immediate or delayed treatment, following completion of sipuleucel-T (SipT) treatment, has on patients and their prostate cancer. Read more about this study

Who is it for?
Ages 18 years and older, men only
Conditions the study is for
Prostate Cancer
What is being tested?
SipT Treatment and Ipilimumab
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
50 participants
Where
2 sitesUnited States
Study dates
22 Apr 2014to 31 Aug 2020
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Histologically confirmed, metastatic prostate adenocarcinoma (positive bone scan and/or measurable disease on CT scan and/or MRI of the abdomen and pelvis).
  • Progressive disease after androgen deprivation, as defined by Prostate Cancer Clinical Trials Working Group 2 (PCWG2) and/or RECIST criteria. Patients must have disease progression by one or both of the following:
  • For patients with measurable disease, progression is defined as at least a 20% increase in the sum of the longest diameter (LD) of target lesions or the appearance of one or more new lesions, as per RECIST criteria version 1.1.
  • For patients with no measurable disease, a positive bone scan and elevated prostate specific antigen (PSA) will be required. PSA evidence for progressive prostate cancer consists of a PSA level of at least 2 ng/milliliter (mL), which has risen on at least 2 successive occasions, at least 1 week apart. If the confirmatory PSA value is not greater than the screening PSA value, then an additional test for rising PSA will be required to document progression.
  • If no prior orchiectomy has been performed, patients must remain on luteinizing hormone-releasing hormone (LHRH) agonist or antagonist (e.g. degarelix) therapy. Patients who are receiving an antiandrogen as part of primary androgen ablation must demonstrate disease progression following discontinuation of the antiandrogen, defined as two consecutive rising PSA values, obtained at least two weeks apart, or documented osseous or soft tissue progression. At least one of the PSA values must be obtained at least four weeks (flutamide) or six weeks (bicalutamide or nilutamide) after discontinuation.
  • Laboratory requirements:
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  • Absolute neutrophil count (ANC) ≥ 1500/μL
  • Bilirubin < 1.5 x upper limit of normal (ULN)
  • Hemoglobin ≥ 8 g/dL
  • PSA ≥ 2 ng/mL
  • Platelets ≥ 100,000/μL
  • aspartate aminotransferase (AST) and alanine aminotransferase (ALT) less than or equal to 2.5 x ULN
  • Creatinine clearance ≥ 60 mL/min by the Cockcroft Gault equation
  • Testosterone less than or equal to 50 ng/dL
  • Eastern Cooperative Oncology Group (ECOG) performance status 0 - 1 and life expectancy ≥ 12 weeks.
  • At least 18 years of age or older.
  • Patients receiving any other hormonal therapy, including any dose of megestrol acetate (Megace), Proscar (finasteride), any herbal product known to decrease PSA levels (e.g. Saw Palmetto, PC-SPES), or any systemic corticosteroid, must discontinue the agent for at least four weeks prior to study treatment. Progressive disease as defined above must be documented after discontinuation of any hormonal therapy (with the exception of a LHRH agonist).
  • Prior radiation therapy must be completed ≥ 4 weeks prior to enrollment and the patient must have recovered from all toxicity. Prior radiopharmaceuticals (strontium, samarium) must be completed ≥ 8 weeks prior to enrollment.
  • Because of the unknown potential risk to a gamete and/or developing embryo from these investigational therapies, patients must agree to use adequate contraception (barrier method for males) for the duration of study participation, and for three months after discontinuing therapy.

Who cannot join

  • Prior chemotherapy for prostate cancer, with the exception of neoadjuvant chemotherapy, because of the potential effect of chemotherapy on the immune system.
  • Prior sipuleucel-T treatment or investigational immunotherapy.
  • Prostate cancer pain requiring regularly scheduled narcotics.
  • Current treatment with systemic steroid therapy (inhaled/topical steroids are acceptable). Systemic corticosteroids must be discontinued for at least 4 weeks prior to first treatment.
  • History of autoimmune disease including, but not limited to:
  • Systemic lupus erythematosis (SLE), scleroderma, CREST syndrome, rheumatoid arthritis
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  • Inflammatory bowel disease, celiac disease, primary biliary cirrhosis, autoimmune hepatitis
  • Dermatomyositis, polymyositis, giant cell arteritis
  • Autoimmune hemolytic anemia (AIHA), cryoglobulinemia, antiphospholipid antibody syndrome (APLS)
  • Diabetes mellitus type I, myasthenia gravis, Grave's disease
  • Wegener's granulomatosis or other vasculitis
  • A history of Hashimoto's thyroiditis, psoriasis, or eczema, any of which has been inactive for at least one year, or isolated Raynaud's phenomenon is acceptable
  • Known central nervous system or visceral metastases.
  • Medical or psychiatric illness that would, in the opinion of the investigator, preclude participation in the study or the ability of patients to provide informed consent for themselves.
  • Cardiovascular disease that meets one of the following: congestive heart failure (New York Heart Association Class III or IV), active angina pectoris, or recent myocardial infarction (within the last 6 months).
  • Concurrent or prior malignancy except for the following:
  • Adequately treated basal or squamous cell skin cancer
  • Adequately treated stage I or II cancer from which the patient is currently in complete remission
  • Any other cancer from which the patient has been disease-free for 5 years
  • Known HIV or other history of immunodeficiency disorder.
  • Prisoners or subjects who are compulsorily detained (involuntarily incarcerated) for treatment of either a psychiatric or medical (e.g. infectious) illness.
  • Any underlying medical or psychiatric condition, which in the opinion of the investigator will make the administration of ipilimumab hazardous or obscure the interpretation of adverse events (AE), such as a condition associated with frequent diarrhea.
  • A history of prior treatment with ipilimumab or prior cluster of differentiation 137 (CD137) agonist or CTLA-4 inhibitor or agonist.

Trial locations and contacts

2 sites in 1 country.

United States2 sites
  • The University of Texas MD Anderson Cancer Center

    Houston, Texas, 77030

  • University of California San Francisco

    San Francisco, California, 94115

Other trials in United States

About this study

Official title: A Randomized Phase 2 Trial of Immediate vs. Delayed Anti-CTLA4 Blockade Following Sipuleucel-T Treatment for Prostate Cancer Immunotherapy

The purpose of this study is to find out what effects taking ipilimumab, as an immediate or delayed treatment, following completion of sipuleucel-T (SipT) treatment, has on patients and their prostate cancer.

Read the detailed description

This is an open-label randomized multicenter Phase 2 clinical trial combining SipT with ipilimumab in patients with chemotherapy-naïve metastatic castration resistant prostate cancer (CRPC).

All patients will be treated with standard SipT (Q2wks x 3). Patients will be randomized to one of two arms:

Arm 1 (Immediate Treatment): Ipilimumab Q3wks x 4 started 1 day following the final dose of SipT (Day 0).

Arm 2 (Delayed Treatment): Ipilimumab Q3wks x 4 started 3 weeks following the final dose of SipT (Day 0).

Following this ipilimumab treatment, patients will then be followed monthly for 3 months and then quarterly until disease progression. The definition of unacceptable toxicity is grade 3 or higher treatment-related toxicities (NCI CTCAE v4) excluding immune-related adverse events (irAEs). The study will assess for the immunogenicity and clinical activity of sequential sipuleucel-T treatment followed by ipilimumab. Patients who experience an initial clinical response to ipilimumab followed by subsequent disease progression will be offered reinduction treatment with ipilimumab.

Conditions
Prostate Cancer
Being tested
SipT Treatment, Ipilimumab
Keywords
castration resistant, prostate, cancer, ipilimumab, provenge, SipT
Medical subject headings
Prostatic Neoplasms, Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • SipT TreatmentDrug

    Also called Provenge

    All patients will receive standard of care SipT treatment every two weeks for a total of 3 treatments. The three treatments usually take about 30 days to complete.

    SipT treatment is given in three 1 hour infusions. Each SipT treatment is generated from a standard blood cell-collection procedure (called leukapheresis) performed 2-3 days prior to the infusion.

  • IpilimumabDrug

    Also called BMS-734016/MDX-010, anti-CTLA4

    Ipilimumab will be given by IV over 90 minutes every 3 weeks. Patients will be monitored during the infusion and up to 1 hour post-infusion.

Study groups in NCT01804465
Study groupRoleWhat they receive
Immediate IpilimumabTreatmentExperimentalArm 1 (Immediate Treatment) Ipilimumab Q3wks x 4 started 1 day following the final dose of SipT.
Receives: Drug: SipT Treatment; Drug: Ipilimumab
Delayed IpilimumabTreatmentExperimentalArm 2 (Delayed Treatment) Ipilimumab Q3wks x 4 started 3 weeks following the final dose of SipT.
Receives: Drug: SipT Treatment; Drug: Ipilimumab

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percentage of Participants With an Immune Response to Prostatic Acid Phosphatase (PAP) and/or PA2024

    Immune response will be tested using the single sample binomial exact test when induction therapy is completed. The Immunoglobulin M (IgM) and Immunoglobulin G (IgG) antibody responses to PAP and/or PA2024 will be assessed by ELISA assay at baseline and week 20 after start of sipT treatment (day 113 of study treatment). A positive response is defined as a titer > 1:400. The positive immune percentage for both IgG and IgM antibodies to PAP and to PA2024 will be used to summarize the results for each study arm.

    Measured: Up to 20 weeks

  2. Proportion of Participants With Highest Grade, Treatment-related, Immune Response Adverse Events (IRAEs)

    Immune Response Adverse Events (IRAEs) will be reported for each study arm by tabulating the frequency of the maximum grade occurring for each patient for each type of iRAE using NCI Common Terminology Criteria for Adverse Events (CTCAE) v. 4.0. IRAEs will be reported as a proportion of the participants in the treatment arm with the associated highest grade IRAE occurrences during protocol therapy.

    Measured: Up to 20 weeks

Secondary outcomes (7)
  1. Proportion of Patients Achieving a Prostate-specific Antigen (PSA) Decline of at Least 30% Below Baseline

    Descriptive statistics will be calculated to characterize the proportion of patients achieving a PSA decline of at least >30% after 1 cycle of treatment and presented along with the 95% confidence intervals for each study arm.

    Measured: Up to 3 weeks

  2. Proportion of Patients Achieving a PSA Decline of at Least 50% Below Baseline

    Descriptive statistics will be calculated to characterize the proportion of patients achieving a PSA decline of at least >50% and presented along with the 95% confidence intervals for each study arm.

    Measured: Up to 3 weeks

  3. Proportion of Patients Achieving an Objective Response

    Proportion of patients achieving an objective response as defined by Immune-related Response Evaluation Criteria In Solid Tumors (irRECIST) as complete response (irCR), partial response (irPR) will be reported along with 95% confidence intervals

    Measured: Up to 2 years

  4. Proportion of Patients Achieving an Objective Response Stratified by Prior Radical Prostatectomy (RP)

    Proportion of patients achieving an objective response as defined by irRECIST as irCR +irPR and stratified by history of prior RP will be reported along with 95% confidence intervals.

    Measured: Up to 2 years

  5. Proportion of Patients Achieving an Objective Response Stratified by Radiation Therapy (RT)

    Proportion of patients achieving an objective response as defined by irRECIST as irCR + irPR stratified by prior RT will be reported along with 95% confidence intervals

    Measured: Up to 2 years

  6. Radiographic Clinical Response Rate

    For each treatment arm, for patients with objective disease, using immune-related response criteria (irRC) criteria, the proportion of patients achieving a complete or partial response will be determined and reported with 95% confidence intervals

    Measured: Up to 6 months

  7. Median Time to PSA Progression

    Time to PSA progression is defined as the start of protocol therapy to progression status at the end of 4 cycles of treatment as determined by the irRECIST.

    Measured: Up to 12 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted5 Mar 2013 (estimated)
  2. Study start22 Apr 2014
  3. Primary completion27 Feb 2020
  4. Study completion31 Aug 2020

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
50 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01804465
Sponsor's protocol ID
12557
Other IDs
NCI-2014-00318
Status last verified
Jul 2021
First submitted
27 Feb 2013
Last updated
18 Aug 2021
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Publications

  • Sinha M, Zhang L, Subudhi S, Chen B, Marquez J, Liu EV, Allaire K, Cheung A, Ng S, Nguyen C, Friedlander TW, Aggarwal R, Spitzer M, Allison JP, Small EJ, Sharma P, Fong L. Pre-existing immune status associated with response to combination of sipuleucel-T and ipilimumab in patients with metastatic castration-resistant prostate cancer. J Immunother Cancer. 2021 May;9(5):e002254. doi: 10.1136/jitc-2020-002254.

    PubMed 33986125

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing SipT Treatment and Ipilimumab in people with Prostate Cancer, run by University of California, San Francisco at 2 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 19 inclusion and 23 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 18 Aug 2021. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 25 Jan 2021). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Participants With an Immune Response to Prostatic Acid Phosphatase (PAP) and/or PA2024 (time frame: Up to 20 weeks). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01804465, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Aug 2021.

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