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Pembro and HER2Bi-Armed Activated T Cells in Treating Patients With Metastatic Castration Resistant Prostate Cancer

Phase II Trial of Immune Checkpoint Inhibitor With Anti-CD3 x Anti-HER2 Bispecific Antibody Armed Activated T Cells in Metastatic Castrate Resistant Prostate Cancer

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03406858
Enrollment
15
Registered
2018-01-23
Start date
2018-06-07
Completion date
2022-11-07
Last updated
2023-05-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Castration Levels of Testosterone, Castration-Resistant Prostate Carcinoma, Prostate Carcinoma Metastatic in the Bone, PSA Progression, Stage IV Prostate Adenocarcinoma AJCC v7

Brief summary

This phase II trial studies how well pembrolizumab and HER2Bi-armed activated T cells work in treating patients with castration resistant prostate cancer that has spread to other places in the body. Monoclonal antibodies, such as pembrolizumab, may interfere with the ability of tumor cells to grow and spread. HER2Bi-armed activated T cells are made using T cells and may target and kill cancer cells. Giving pembrolizumab and HER2Bi-armed activated T cells may work better in treating patients with castration resistant prostate cancer.

Detailed description

PRIMARY OBJECTIVES: I. To estimate the clinical efficacy of 8 infusions of HER2 HER2Bi-armed activated T cells (BATs) (up to 10\^10/infusion) twice per week for 4 weeks in combination with pembrolizumab once every 3 weeks starting with one dose 3 weeks before the 1st BATs infusion, by assessing the percentage of patients free of clinical progression at 6 months after registration. SECONDARY OBJECTIVES: I. Evaluate phenotype, cytokine profiles and IFN-gamma enzyme-linked immunosorbent spots (ELISpots), cytotoxicity and antibodies directed at laboratory prostate cancer cell lines for proof of principle of immune system activation and to correlate with clinical outcomes of response, progression free survival (PFS), and overall survival (OS). II. Evaluate the magnitude of change in tumor infiltrating T cells, PD-1 expression, and the Th1/Th2 ratio in prostate cancer tumor tissue before and after immunotherapy and correlate it with the clinical outcomes of response, PFS, and OS. OUTLINE: Patients receive pembrolizumab intravenously (IV) over 30 minutes every 3 weeks. Treatment repeats every 3 weeks for up to 6 months in the absence of disease progression or unacceptable toxicity. Beginning at least 1 week after pembrolizumab, patients receive HER2Bi-armed activated T cells IV over 5-15 minutes 2 times a week for 4 weeks in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 3 months.

Interventions

OTHERLaboratory Biomarker Analysis

Correlative studies

BIOLOGICALPembrolizumab

Given IV

Sponsors

National Cancer Institute (NCI)
CollaboratorNIH
Barbara Ann Karmanos Cancer Institute
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
19 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Be willing and able to provide written informed consent/assent for the trial * Have histologically confirmed prostate adenocarcinoma, with metastases * Progression by either PSA, Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria for measurable disease or new areas of metastases on bone scan or symptom progression related to prostate cancer despite castrate levels of testosterone; (level \< 50 ng/ml) * Be agreeable to continue to maintain castrate levels of testosterone * At least 2 weeks should have elapsed since any immunosuppressive therapy * At least 4 weeks since prior chemotherapy for metastatic disease or at least 2 weeks since prior androgen targeting agents such as ketoconazole, abiraterone, enzalutamide, etc. * Discontinue anti-androgens prior to therapy; at least 6 weeks since last dose of bicalutamide or nilutamide and at least 4 weeks from last dose of flutamide * Have normal bone marrow, renal and hepatic function as deemed by the treating physician and approved by the clinical principal investigator (PI) Dr. Vaishampayan * Not have concurrent anti-cancer therapy * Not have concurrent immunosuppressive therapy or medical condition likely to cause immunosuppression * Have life expectancy \> 6 months * Have a performance status of 0 or 1 on the Eastern Cooperative Oncology Group (ECOG)/Zubrod performance scale * Agree to use an adequate method of contraception starting with the first dose of study therapy through 120 days after the last dose of study therapy * Note: Abstinence is acceptable if this is the usual lifestyle and preferred contraception for the subject * Within 10 days of treatment registration: Absolute neutrophil count (ANC) \>= 1,500 /mcL * Within 10 days of treatment registration: Platelets \>= 100,000 / mcL * Within 10 days of treatment registration: Hemoglobin \>= 9 g/dL or \>= 5.6 mmol/L without transfusion or erythropoietin (EPO) dependency (within 7 days of assessment) * Within 10 days of treatment registration: Serum creatinine =\< 1.5 X upper limit of normal (ULN) OR measured or calculated creatinine clearance (glomerular filtration rate \[GFR\] can also be used in place of creatinine or creatinine clearance \[CrCl\]) \>= 60 mL/min for subject with creatinine levels \> 1.5 X institutional ULN * Within 10 days of treatment registration: Serum total bilirubin =\< 1.5 X ULN OR direct bilirubin =\< ULN for subjects with total bilirubin levels \> 1.5 ULN * Within 10 days of treatment registration: Aspartate aminotransferase (AST) (serum glutamic-oxaloacetic transaminase \[SGOT\]) and alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase \[SGPT\] =\< 2.5 X ULN OR =\< 5 X ULN for subjects with liver metastases * Within 10 days of treatment registration: Albumin \>= 2.5 mg/dL * Within 10 days of treatment registration: International normalized ratio (INR) or prothrombin time (PT) =\< 1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or partial thromboplastin time (PTT) is within therapeutic range of intended use of anticoagulants * Within 10 days of treatment registration: Activated partial thromboplastin time (aPTT) =\< 1.5 X ULN unless subject is receiving anticoagulant therapy as long as PT or PTT is within therapeutic range of intended use of anticoagulants

Exclusion criteria

* Is currently participating and receiving study therapy or has participated in a study of an investigational agent and received study therapy or used an investigational device within 4 weeks of the first dose of treatment * Has a diagnosis of immunodeficiency or is receiving systemic steroid therapy (\> 10 mg of prednisone daily or equivalent steroid doses) or any other form of immunosuppressive therapy within 7 days prior to the first dose of trial treatment * Has a known history of active TB (Bacillus tuberculosis) * Has hypersensitivity to pembrolizumab or any of its excipients * Has had a prior anti-cancer monoclonal antibody (mAb) within 4 weeks prior to study day 1 or has not recovered (i.e. =\< grade 1 or at baseline) from adverse events due to agents administered earlier; Note: Subjects with =\<grade 2 neuropathy are an exception to this criterion and may qualify for the study * Has received major surgery, subject must have recovered adequately from the toxicity and/or complications from the intervention prior to starting therapy * Has a known additional malignancy that is progressing or requires active treatment; exceptions include basal cell carcinoma of the skin or squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer * Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis; subjects with previously treated brain metastases may participate provided they are stable (without evidence of progression by imaging for at least four weeks prior to the first dose of trial treatment and any neurologic symptoms have returned to baseline), have no evidence of new or enlarging brain metastases, and are not using steroids for at least 7 days prior to trial treatment; this exception does not include carcinomatous meningitis which is excluded regardless of clinical stability * Has active autoimmune disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or immunosuppressive drugs); replacement therapy (e.g. thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment * Has known history of, or any evidence of active, non-infectious pneumonitis * Has an active infection requiring systemic therapy * Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject?s participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating investigator * Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial * Father children within the projected duration of the trial, starting with the pre-screening or screening visit through 120 days after the last dose of trial treatment * Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent * Has a known history of human immunodeficiency virus (HIV) (HIV 1/2 antibodies) * Has known active hepatitis B (e.g. hepatitis B surface antigen \[HBsAg\] reactive) or hepatitis C (e.g. hepatitis C virus \[HCV\] ribonucleic acid \[RNA\] \[qualitative\] is detected) * Has received a live vaccine within 30 days of planned start of study therapy; Note: Seasonal influenza vaccines for injection are generally inactivated flu vaccines and are allowed; however intranasal influenza vaccines (e.g. Flu-Mist) are live attenuated vaccines, and are not allowed * Has history of cardiac or pulmonary impairment either by clinical history or symptoms or cardiac ejection fraction \< 40%

Design outcomes

Primary

MeasureTime frameDescription
Progression-free SurvivalUp to 6 monthsPercentage of patients achieving clinical progression-free interval at 6 months from study registration

Countries

United States

Participant flow

Pre-assignment details

One patient went through Pheresis but did not return for treatment. They were excluded from the Progression-Free Survival analysis but were included in adverse events since they began the process.

Participants by arm

ArmCount
Treatment (Pembrolizumab, HER2Bi-armed Activated T Cells)
Patients receive pembrolizumab IV over 30 minutes every 3 weeks. Treatment repeats every 3 weeks for up to 6 months in the absence of disease progression or unacceptable toxicity. Beginning at least 1 week after pembrolizumab, patients receive HER2Bi-armed activated T cells IV over 5-15 minutes 2 times a week for 4 weeks in the absence of disease progression or unacceptable toxicity. HER2Bi-Armed Activated T Cells: Given IV Laboratory Biomarker Analysis: Correlative studies Pembrolizumab: Given IV
13
Total13

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyFailure to receive treatment drug.1
Overall Studyineligible1

Baseline characteristics

CharacteristicTreatment (Pembrolizumab, HER2Bi-armed Activated T Cells)
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
9 Participants
Age, Categorical
Between 18 and 65 years
4 Participants
Age, Continuous69 years
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
1 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
12 Participants
Region of Enrollment
United States
13 participants
Sex: Female, Male
Female
0 Participants
Sex: Female, Male
Male
13 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
9 / 14
other
Total, other adverse events
14 / 14
serious
Total, serious adverse events
7 / 14

Outcome results

Primary

Progression-free Survival

Percentage of patients achieving clinical progression-free interval at 6 months from study registration

Time frame: Up to 6 months

Population: All patients that received treatment. One patient went through Pheresis but never returned for treatment.

ArmMeasureValue (NUMBER)
Treatment (Pembrolizumab, HER2Bi-armed Activated T Cells)Progression-free Survival38.5 percentage of participants

Source: ClinicalTrials.gov · Data processed: Feb 19, 2026