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Intraprostatic PRX302 Injection to Treat Localised Prostate Cancer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03081481
Recruitment Status : Completed
First Posted : March 16, 2017
Last Update Posted : April 10, 2019
Information provided by (Responsible Party):
Sophiris Bio Corp

Tracking Information
First Submitted Date  ICMJE March 7, 2017
First Posted Date  ICMJE March 16, 2017
Last Update Posted Date April 10, 2019
Actual Study Start Date  ICMJE June 7, 2017
Actual Primary Completion Date November 28, 2018   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: March 15, 2017)
Incidence of Treatment-Emergent Adverse Events [Safety and Tolerability] [ Time Frame: 26 weeks post administration ]
Treatment-emergent adverse events (TEAEs), including both serious and non-serious AEs, and assessments of severity and relatedness to both the study drug agent (PRX302) and the rest of the injection procedure
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE
 (submitted: March 15, 2017)
Proportion of patients with an absence of clinically significant prostate cancer in the targeted area at 24 weeks post-administration of PRX302, as determined by a transperineal targeted biopsy [Efficacy] [ Time Frame: 24 weeks post administration ]
Clinically significant disease is defined as Gleason 7, or in the presence of Gleason 3+3 a maximum cancer core length > 6 mm
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Intraprostatic PRX302 Injection to Treat Localised Prostate Cancer
Official Title  ICMJE Multi-Centre, Ph IIb Study, Evaluating Safety & Efficacy of Targeted Intraprostatic Admin of PRX302 to Treat Men With Histologically Proven, Clinically Significant, Localised Prostate Cancer Associated With MRI Lesion
Brief Summary The purpose of this study is to determine a safe, effective, and tolerable dose of PRX302 for the treatment of low to intermediate risk prostate cancer.
Detailed Description A multi-centre, open label, phase IIb study, evaluating the safety, tolerability and efficacy of a targeted intraprostatic focal administration in development. The study will treat approximately 40 men who meet the eligibility criteria, and give written consent. Safety and tolerability will be assessed post-treatment over 26 weeks. Efficacy will be assessed by biopsy and imaging (mpMRI) at 24 weeks.
Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 2
Study Design  ICMJE Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Condition  ICMJE Prostate Cancer
Intervention  ICMJE Drug: PRX302
Single prostate cancer lesion injected with PRX302
Other Name: Topsalysin
Study Arms  ICMJE Experimental: PRX302
intraprostatic administration
Intervention: Drug: PRX302
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Actual Enrollment  ICMJE
 (submitted: April 8, 2019)
Original Estimated Enrollment  ICMJE
 (submitted: March 15, 2017)
Actual Study Completion Date  ICMJE April 5, 2019
Actual Primary Completion Date November 28, 2018   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • Life expectancy ≥ 10 years.
  • Serum prostate-specific antigen (PSA) ≤ 15ng/mL.
  • A histologically proven, clinically significant lesion visible on mpMRI (magnetic resonance imaging) that is accessible to PRX302 transperineal injection.
  • Radiological stage T1-T2 N0 Mx/M0 disease.
  • Targeted prostate biopsy within 6 months prior to dosing, with a clinically significant lesion correlating with an mpMRI visible lesion.

Exclusion Criteria:

  • Previous radiation therapy to the pelvis.
  • Androgen suppression or anti-androgen therapy within the 12 months prior to dosing, for prostate cancer.
  • Use of 5-alpha reductase inhibitor within the 3 months prior to dosing.
  • Evidence of metastatic disease or nodal disease outside the prostate on bone scan or cross-sectional imaging.
  • Inability to tolerate transrectal ultrasound (TRUS).
  • Known allergy to latex or gadolinium (Gd).
  • Prior rectal surgery preventing insertion of the TRUS probe.
  • Any previous ablative procedures performed on the prostate, e.g., electroporation, radiofrequency ablation, high-intensity focused ultrasound (HIFU), cryosurgery, photochemical, thermal or microwave therapy to treat cancer of the prostate.
  • Unable to have pelvic MRI scanning (severe claustrophobia, permanent cardiac pacemaker, metallic implant, etc., likely to contribute significant artifact to images).
Sex/Gender  ICMJE
Sexes Eligible for Study: Male
Ages  ICMJE 40 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE United Kingdom,   United States
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT03081481
Other Study ID Numbers  ICMJE PRX302-2-08
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
IPD Sharing Statement  ICMJE
Plan to Share IPD: No
Responsible Party Sophiris Bio Corp
Study Sponsor  ICMJE Sophiris Bio Corp
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Principal Investigator: Hashim U Ahmed, MD Imperial College London
PRS Account Sophiris Bio Corp
Verification Date April 2019

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP