Imaging of Residual Tumor During Prostatectomy

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: NCT01173146
Recruitment Status : Withdrawn (Costs for antibody production rose; supplemental funding request not approved.)
First Posted : July 30, 2010
Last Update Posted : May 25, 2016
Vanderbilt University
Cornell University
Information provided by (Responsible Party):
David Benaron, Spectros Corporation

Brief Summary:

Prostate Cancer is the most common cancer in men, affecting about as many men as women diagnosed with breast cancer, and killing about as many men per year as breast cancer kills women.

The most common surgical treatment is prostatectomy, the removal of the prostate. During prostate surgery, tumor remains at the edge of the surgery, called residual tumor, in 30% of all prostatectomies. Such patients have a significantly higher risk of local recurrence of the cancer, and higher rates of death. In contrast, even patients with cancer outside of the prostate, but still nearby the prostate, do better when the margins are made clean of tumor during surgery.

The investigators propose to reduce the number of patients with residual tumor after surgery. The investigators will test in patients a fluorescent molecule that allows cancer to be detected during surgery. If this trial works as designed, the investigators will reduce the number of patients who have to receive additional treatment, such as high doses of radiation to the lower abdomen, because the amount of residual tumor left behind has been minimized. This may also lead to higher rates of survival.

This type of detection of cancer the investigators employ is called Molecular imaging. The investigators believe that molecular imaging will be the key to improved diagnosis, individualized treatment selection, and treatment monitoring.

If successful, a large human trial will be conducted after this study with a corporate imaging partner.

Condition or disease
Prostate Cancer

Detailed Description:

In this 5 year academic-industrial partnership to FDA approval, an experienced team and partners including Cornell, Vanderbilt, Intuitive Surgical, LI-COR, and Sand Hill Institute, will move a prostate-targeted fluorescent contrast agent, demonstrated in animals in a prior project to allow real-time detection of residual tumor, through FDA approval to human use. The unmet need is that because prostate tumor at the surgical margin is undetectable in real time, residual tumor at the margin occurs in 30% of all prostatectomies. Such patients have a significantly higher risk of local recurrence, metastasis, and death, and also require radiation therapy. In contrast, even patients with extra-prostatic extension of tumors do better when the margins are made clean of tumor during surgery.

We propose to leverage our experience and our animal-proven agent to synthesize, receive FDA IND approval on, and Phase I/II test our targeted fluorescent conjugate in a pilot study in 96 human subjects. Our agent is made from a commercial LI-COR fluorescent dye, and a humanized antibody from Cornell and Millennium Pharmaceuticals (huJ-591). The targeted antibody tags Prostate-Specific Membrane Antigen (PSMA) which is present on the outside of all prostate cells of luminal (prostate duct) origin, and was demonstrated in prior funding to produce 4-12 fold contrast for prostate cells over nearby tissues in animals. The device will be tested a sites using a fluorescence-sensitive surgery system from Intuitive Surgical, a $10 billion robotic surgery company.

The PI of this grant has previously developed and commercialized fundamental optical technologies -- he (1) co-developed the first in vivo luciferase imaging system at Stanford and co-founded Xenogen, and (2) he developed T-Stat®, the first FDA-approved detection system for insufficient blood flow to tissue. Other team members have synthesized dye conjugates for commercial use, and managed antibody-based drug formulation through FDA approval.

The corporate partners, LiCor (a world-leader in automated sequencing instruments and reagents using near infrared devices and dyes) and Sand Hill Institute (experienced at antibody formulation), and Intuitive Surgical, provide proven commercial translational experience in contrast agents and FDA approval. These groups will formulate and synthesize the agent, leading to FDA IND filing and human clinical testing. Alternative paths minimize risks at each stage.

If successful, the commercial dye will be readied for Phase III multi-center trial with a major surgical tool partner, a costly and required path to market introduction. Major imaging companies (Siemens, Phillips, GE, and others) also have molecular imaging programs, into which this contract agent will fit. A successful imaging agent would likely be adopted. Extensions to ovarian cancer using the folate type II receptor, and other targets, are envisioned, including use with other targeting antibodies developed by other groups. We anticipate that this will be among the first of many real-time surgery-targeting optical contrast agents in human subjects. Areas with immediate application are the detection of lymphatic spread intraoperatively for prostate cancer, as well as for ovarian cancer using a Folate. We expect that the market for such a device in cancer could reasonably be in the hundreds of millions of dollars/year.

Study Type : Observational
Actual Enrollment : 0 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Imaging of Residual Prostate Cancer During Prostatectomy Using ProstaFluor®, a Prostate-Specific Membrane Antigen (PSMA)-Targeted Fluorescent Agent FDA Trial
Study Start Date : December 2011
Actual Primary Completion Date : June 2015
Actual Study Completion Date : June 2015

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Prostate Cancer
U.S. FDA Resources

Primary Outcome Measures :
  1. Efficacy of ProstaFluor® measured by Margin positivity after surgery (Phase II) [ Time Frame: 2 weeks after surgery for each patient ]
    Is residual disease present in subject after surgery?

  2. Safety of Prostafluor® (Phase I) [ Time Frame: 6 weeks after surgery for each patient ]
    Testing for adverse reactions to Prostafluor

Secondary Outcome Measures :
  1. Binding of ProstaFluor® to Prostate Cells as Measured in Pathology Laboratory After Prostatectomy [ Time Frame: 96 hours after surgery ]
    Prostates removed will be studied during dose escalation for evidence of binding to prostate cells of luminal origin.

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Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Subjects undergoing prostatectomy for prostate cancer.

Inclusion Criteria:

  • Diagnosis of Prostate Cancer
  • Plan for Prostatectomy
  • Signed informed consent

Exclusion Criteria:

  • Informed consent not obtained

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01173146

United States, Tennessee
Vanderbilt University
Nashville, Tennessee, United States, 37203
Sponsors and Collaborators
Spectros Corporation
Vanderbilt University
Cornell University
Principal Investigator: David Benaron, MD Spectros Corporation

Responsible Party: David Benaron, CEO, Spectros Corporation Identifier: NCT01173146     History of Changes
Other Study ID Numbers: PCA-002
First Posted: July 30, 2010    Key Record Dates
Last Update Posted: May 25, 2016
Last Verified: May 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Plan Description: Study withdrawn, no data collected.

Keywords provided by David Benaron, Spectros Corporation:
Primary prostate cancer undergoing prostatectomy

Additional relevant MeSH terms:
Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Genital Diseases, Male
Prostatic Diseases