Skip to content

Safety and Efficacy of OTL78 (Zopocianine)

Safety and Efficacy of OTL78 (Zopocianine), a Prostate-Specific Membrane Antigen (PSMA)-Targeted Fluorescent Agent, for Intraoperative Imaging of Prostate Cancer: A Phase IIb Trial

Status
Not yet recruiting
Phases
Phase 2Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07725523
Enrollment
36
Registered
2026-07-24
Start date
2026-10-01
Completion date
2027-09-01
Last updated
2026-09-10

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

Conditions

Prostate Cancer Metastatic Disease, Prostate Cancer Surgery

Keywords

Prostate Specific Membrane Antigen, Fluorescent Imaging, Near infrared imaging

Brief summary

This study is being done to support the selection of single dose and timing regimen of Zopocianine (OTL78) in combination with Near InfraRed (NIR) fluorescent imaging to improve the detection of malignant (growing in an uncontrolled way) tissue in adult patients undergoing prostatectomy and lymph node dissection for biopsy confirmed prostate cancer.

Detailed description

Prostate cancer (PCa) is the second leading cause of cancer-related death behind lung cancer. Prostate cells express Prostate Specific Membrane Antigen (PSMA), which is overexpressed in PCa cells in over 90% of patients. On Target has developed a PSMA-targeted agent, the drug product OTL78, that fluoresces under NIR illumination to help with the identification of prostate cancer tissue during resection surgery that has extended beyond the capsule of the prostate into adjacent tissue and lymph nodes. Intra-operative identification of cancer tissue using real-time imaging modalities that could improve tumor identification, demarcation and lymph node involvement may provide a very useful tool to reduce the frequency of residual cancer and increase complete removal of locally involved lymph nodes. This study is an open label trial of an imaging agent, PSMA targeted fluorescent dye (zopocianine, OTL78), in up to 32 participants with biopsy confirmed PCa who have been scheduled to undergo a laparoscopic radical prostatectomy with pelvic lymph node dissection in order to confirm the optimal dose and administration-to-surgery interval of the drug in visualizing cancerous tissue during a standard of care radical prostatectomy.

Interventions

DRUG0.06mg/kg ZOPOCIANINE given 1-7 days prior to surgery

A single dose of 0.06mg/kg ZOPOCIANINE used with NIR fluorescent imaging during prostatectomy and lymph node dissection

Sponsors

Clinton Bahler
Lead SponsorOTHER
On Target Laboratories, LLC
CollaboratorINDUSTRY
Indiana University
CollaboratorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
MALE
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Provision of signed and dated informed consent and HIPAA form 2. Male participants 18 years of age and older 3. Known primary prostate cancer and any one of the following: 1. Grade group 3-5; 2. Suspected extra-prostatic extension (EPE) or seminal vesicle invasion (SVI); 3. Suspected lymph node metastasis (clinical stage cN1) by magnetic resonance imaging or by Prostate Specific Membrane Antigen positron emission tomography 4. Planned to undergo a standard of care robotic prostatectomy and lymph node dissection 5. Ability to understand the requirements of the study and agree to abide by the study restrictions and to return for the required assessments 6. Agree to use a medically acceptable method of birth control (e.g., spermicide in conjunction with a barrier such as a condom) or sexual abstinence for the duration of the study, including through final study visit (6 weeks) after the dose of study drug. Sperm donation is prohibited during the study and for 3 months after the dose of study drug. Female partners must use hormonal or barrier contraception unless postmenopausal or abstinent. 7. Patient scheduled to have or has had a PSMA-PET Scan for surgical treatment planning within 12 months of surgery.

Exclusion criteria

1. The surgeon plans to perform an extraperitoneal approach 2. History of anaphylactic reactions to products containing indocyanine green 3. History of allergy to any of the components of ZOPOCIANINE: 1. 2-\[3-(1,3-dicarboxypropyl)ureido\] pentanedioic acid (DUPA) 2. Polyethylene glycol-dipeptide linker 3. Chlorodye 4. Impaired renal or hepatic function: 1. Renal: creatinine clearance (eGFR) \< 50 mL/min 2. Hepatic: total bilirubin \> 2 × upper limit of normal or ALT/AST \> 3 × upper limit of normal. 5. Patients with QTc interval ≥ 470 msec per electrocardiogram (ECG) at screening calculated via the Bazett formula. 6. Significant acute or chronic medical, neurologic, or illness in the participant that, in the judgment of the Principal Investigator, could compromise participant safety, limit the ability to complete the study, and/or compromise the objectives of the study.

Design outcomes

Primary

MeasureTime frameDescription
Proportion of subjects who have a Clinically Significant EventDay of surgerya) Histologically confirmed cancer in residual non-nodal soft tissue resected solely because of "NIR only" detection as suspicious following prostatectomy. b) One or more resected NIR- positive lymph nodes that contain metastatic disease as confirmed by pathology.

Secondary

MeasureTime frameDescription
Detection of Primary cancerDay of surgeryFor primary cancer, the number of lesions that are either: fluorescence positive, and prostate cancer positive (i.e., true positive); fluorescence positive but cancer negative (i.e., false positive); fluorescence negative but cancer positive (i.e., false negative); or, fluorescence negative and cancer negative (i.e., true negative). We will consider disease state at four (4) defined prostate regions - right posterior, left posterior, anterior, and at the bladder neck
Detection of Metastatic CancerDay of surgeryFor metastatic cancer spread to lymph nodes, the number of lesions that are either: fluorescence positive, and prostate cancer positive (i.e., true positive); fluorescence positive but cancer negative (i.e., false positive); fluorescence negative but cancer positive (i.e., false negative); or, fluorescence negative and cancer negative (i.e., true negative). We will use six (6) defined lymph node regions (external iliac, internal iliac, common iliac and right and left)
Execution of pre-surgery planDay of surgeryThe pre-surgery plan will be documented and compared to the documented surgery performed if surgeon reports of changes in scope from initial plan.
Incidence rates AEs and all SAEsScreening to 6 week follow-upIncidence rates of all causally related AEs and all SAEs

Countries

United States

Contacts

CONTACTBrandon Garver
brwgarve@iu.edu317-278-4766
PRINCIPAL_INVESTIGATORClint Bahler, MD

Indiana University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 11, 2026