Neoadjuvant J591 Treatment for Prostate Cancer

Phase 1

Completed

Brief Summary: 10 patients will be enrolled in the initial cohort and will receive two infusions of unlabeled huJ591 on days 1 and 14. 89Zr-J591 will be administered on day 21 (+ 1 day) and a positron emission tomography-computed tomography (PET/CT) will be performed week later on day 28 + 1 (visit 4). Approximately 2 to 3 weeks after the 2nd dose of J591, the patient will undergo radical prostatectomy with or without lymph node dissection (day 31 + 4 days). The final visit for the study will include a postoperative visit two weeks following surgery.

Detailed Description: This is an open-label, single center pilot study to evaluate the efficacy of huJ591 to trigger antibody-dependent cellular cytotoxicity (ADCC) response manifested by a peri-tumoral inflammatory response with or without apoptosis of prostate cancer cells in patients diagnosed with either high or intermediate-risk prostate cancer. To participate the patients will be required to meet all eligibility criteria. Patients may not participate in other clinical trials while undergoing therapeutic treatment.

The initial screening period (up to 28 days prior to start of treatment under this clinical trial) consists of visit to confirm eligibility, discuss the risks / benefits of participating in the trial and radical prostatectomy (with or without lymph node dissection), and obtain patient prostate biopsy samples for anti-prostate specific membrane antigen (PSMA) expression review. An enrolled subject's participation in the study entails approximately 6 to 7 weeks of therapy along with the additional 2 weeks time involved in recovery from a radical prostatectomy. Adverse events will be collected throughout the entirety of the study. The total duration of the patient being in the study can be around 9 to 11 weeks. Medical information/Survival information will be collected from the routine followup visits (standard of care) for up to 3 years after the surgery.

Recruitment & Eligibility

Inclusion Criteria

Adult male > 18 years of age
Histologically confirmed diagnosis of prostate cancer
Intermediate or high risk prostate cancer defined by:
- High risk (any one of the following):
  1. Gleason grade > 8
  2. Gleason grade 4+3 with more than 3 cores involved with > 20% of volume involved
  3. Any Gleason with PSA above 20 ng/mL
  4. Gleasone > 4+3 and tumor stage clinical T3 or above
- Intermediate risk prostate cancer defined as:
  1. Gleason grade = 7
  2. Any Gleason with PSA between 10 and 20 ng/mL
Eastern Cooperative Oncology Group (ECOG) Performance status of 0-1
Ability to understand and willingness to sign a written informed consent document
Prostate biopsy with + PSMA expression in tumor cells by immunohistochemistry

Exclusion Criteria

Serum creatinine > 3x upper limit of normal (ULN)
Bilirubin (total) > 1.5 x ULN; subjects with Gilbert's syndrome will be allowed if direct bilirubin is within institutional normal limits
Aspartate Aminotransferase (AST) and Alanine Aminotransferase (ALT or SGOT) > 2.5x ULN
Other severe acute or chronic medical condition or laboratory abnormality that may increase the risk associated with study participation
On any other new anticancer therapy between screening and prostatectomy
Frank metastasis identified during clinical staging
Patient ineligible for radical prostatectomy for any other reason

Arm && Interventions

Group	Intervention	Description
huJ591 followed by 89Zr-J591	89Zr-J591	Subjects will receive two infusions of unlabeled huJ591 on days 1 and 15 (+/- 1 day). 89Zr-J591 will be administered on day 22 (+/- 1 day) and 5-8 days later. PET/CT will be performed followed by repeat imaging of the prostate. Radical prostatectomy with or without lymph node dissection is performed 2 to 4 weeks after the second dose of J591.
huJ591 followed by 89Zr-J591	huJ591	Subjects will receive two infusions of unlabeled huJ591 on days 1 and 15 (+/- 1 day). 89Zr-J591 will be administered on day 22 (+/- 1 day) and 5-8 days later. PET/CT will be performed followed by repeat imaging of the prostate. Radical prostatectomy with or without lymph node dissection is performed 2 to 4 weeks after the second dose of J591.

Primary Outcome Measures

Name	Time	Method
Induction of inflammatory and/or apoptotic response of prostate cancer cells by reviewing H&E stained slides from pre treatment biopsy and comparing to the post-treatment radical prostatectomy pathology using the Peri-tumoral inflammation 4-point scoring	Change from baseline in Peri-tumoral inflammation 4-point scoring at Day 31 post prostatectomy

Secondary Outcome Measures

Name	Time	Method
Time to biochemical (PSA) and/or radiographic recurrence will be followed by drawing PSA samples and performing radiographic scans.	From date of first treatment until the date of first documented progression or date of death, whichever came first, assessed up to 36 months	PSA values will be monitored at screening, then at months 3, 6, 9, 12, 18, 24, and 36 after Day 1 of treatment. Radiographic scans will be performed at screening and at months 6, 12, 18, 24, 30, and 36.
Number of participants with treatment-related adverse events as assessed by CTCAE v4.0	Adverse events will be monitored on Days 1, 14, 21, 28, 31, and 45

Locations (1): Weill Cornell Medical College
🇺🇸
New York, New York, United States