NCT01197209

Neoadjuvant Study of In-situ REIC/Dkk-3 in Prostate Cancer

A Phase I Neoadjuvant Study of In-situ REIC/Dkk-3 Therapy Followed By Prostatectomy in Patients With High Risk Localized Prostate Cancer

• Status: Withdrawn
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 0 (actual)
• Sponsor: Momotaro-Gene Inc. · Industry
• Sex: Male
• Age: 20 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

This is a phase I neoadjuvant gene therapy followed by prostatectomy, open-label, dose-escalation trial for prostate cancer patients with high risk of local recurrence after radical prostatectomy. Patients entered into this trial will have Prostate Cancer of Clinical stage T1c, T2 or T3 with a Gleason Score of between 7 (4+3) and 10 at the time of enrollment. Patients will receive three 1 mL injections (3 mL total volume) of Ad-REIC/Dkk-3 into the prostate prior to undergoing a radical prostatectomy. Three patients will be treated at each dose level unless a dose-limiting toxicity (DLT) is observed or MFD (defined as 1 x 10e12 vp/treatment) is achieved with expansion for up to 6 more patients at the MTD or MFD.

Detailed description

This is a phase I neoadjuvant gene therapy followed by prostatectomy, open-label, dose-escalation trial for prostate cancer patients with high risk of local recurrence after radical prostatectomy. Patients entered into this trial will have Prostate Cancer of Clinical stage T1c, T2 or T3 with a Gleason Score of between 7 (4+3) and 10 at the time of enrollment. Patients will receive three 1 mL injections (3 mL total volume) of Ad-REIC/Dkk-3 into the prostate under transrectal ultrasound-guidance (TRUS) and, patients will undergo a radical prostatectomy four weeks after the injection. Patients will receive treatment at one of three dose levels in a sequential dose-escalating design. Three patients will be treated at each dose level unless a dose-limiting toxicity (DLT) is observed or MFD (defined as 1 x 10e12 vp/treatment) is achieved. Enrollment will proceed to the next dose level if 0 of 3 patients experiences a DLT; if one of the first 3 patients experiences a DLT, three additional patients will be enrolled until a second patient experiences a DLT (which defines the toxic dose) or until six total patients have been treated at that dose level, whichever comes first. If a second DLT is not experienced within that cohort, dose escalation may continue. Additional patients will be enrolled a minimum of 14 days after treatment of the first patient in the cohort (sentinel patient). If 2 DLTs are observed within a cohort, enrollment into the cohort will cease and the dose level immediately preceding that dose will be determined to be the MTD. If 2 non-lethal DLTs are observed in Cohort 1, a lower dose cohort (Cohort -1) may be initiated. Once the MTD is defined, an additional 3-6 patients may be enrolled at that dose level to further evaluate safety of the MTD. Patients will undergo a scheduled radical prostatectomy approximately 4 weeks after the Ad-REIC/Dkk-3 injection. The prostate tissue removed will be retained and for those patients treated at the MTD, assessed for REIC expression and evidence of apoptosis by TUNEL staining.

Conditions

• Prostate Cancer

Interventions

Type	Name	Description
BIOLOGICAL	Ad-REIC/Dkk-3	REIC (Reduced Expression in Immortalized Cells) protein is down regulated in a variety of cancer cell lines including prostate tumors. The REIC gene is identical to the Dickkopf-3 (Dkk-3) gene that is a member of the Dickkopf gene family. Ad-REIC/Dkk-3 is designed as a viral vector that delivers a DNA plasmid capable of producing intracellular REIC protein. The expression plasmid includes the full-length human cDNA sequence for REIC. The adenovirus vector is a transport mechanism to infuse the REIC/Dkk-3 plasmid into the cell providing a temporary transfusion of REIC protein.

Timeline

• Start date: 2010-09-01
• Primary completion: 2010-12-01
• Completion: 2010-12-01
• First posted: 2010-09-09
• Last updated: 2013-08-23

Locations

1 site across 1 country: United States