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A Fluorescent Tumor Marking Agent, Tozuleristide, for Imaging Oral Cavity Squamous Cell Cancer and High-Grade Oral Cavity Dysplasia During Surgery

Intraoperative Visualization of Oral Cavity Squamous Cell Carcinoma and High-Grade Dysplasia With Tozuleristide, a Fluorescent Tumor Marking Agent

Status
Terminated
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05316688
Enrollment
8
Registered
2022-04-07
Start date
2024-04-17
Completion date
2025-09-26
Last updated
2026-02-25

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

Conditions

Oral Cavity Squamous Cell Carcinoma, Stage I Lip and Oral Cavity Cancer AJCC v8, Stage II Lip and Oral Cavity Cancer AJCC v8, Stage III Lip and Oral Cavity Cancer AJCC v8, Stage IVA Lip and Oral Cavity Cancer AJCC v8

Brief summary

This phase I/II trial studies the side effects of tozuleristide in imaging oral cavity squamous cell cancer and high-grade oral cavity dysplasia during surgery. Tozuleristide is an imaging agent that specifically binds to tumor cells. When exposed to near-infrared light, tozuleristide causes tumor cells to fluoresce (light up), so that surgeons may better distinguish tumor cells from healthy cells during surgery.

Detailed description

OUTLINE: Beginning 1 hour before surgery, patients receive tozuleristide intravenously (IV) over 1-5 minutes. Patients then surgical resection per standard of care and undergo near infrared (NIR) imaging with standard of care device.

Interventions

Undergo NIR imaging

PROCEDURETherapeutic Conventional Surgery

Undergo surgery

Given IV

Sponsors

University of Washington
Lead SponsorOTHER
Blaze Bioscience Inc.
CollaboratorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE

Eligibility

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

Inclusion criteria

* Adult subjects age \>= 18 years (yr) * Subjects must have suspected or confirmed oral cavity dysplasia or cT1-4 squamous cell carcinoma for which surgical excision is deemed clinically indicated by the treating physician. Histology confirmation not required prior to surgery * Able to provide written informed consent * If of child-bearing potential, agree to the continued use of 2 reliable forms of contraception from study enrollment through 30 days after receiving the study product. Male subjects must agree to use 2 reliable methods of contraception simultaneously for 30 days after receiving the study product if their partner is of child-bearing potential * Available for all study visits and able to comply with all study requirements

Exclusion criteria

* Known or suspected sensitivity to indocyanine green * In the opinion of the treating physician, subject has received photosensitizing medication that could interfere or confound study results * Any current medications with the potential to generate fluorescence or photochemical reaction * Enrolled in any other ongoing study * Currently lactating or breastfeeding * Positive pregnancy test or planning to become pregnant within 30 days (d) of receiving tozuleristide * Any current condition, including psychological and social situations which, in the opinion of the investigator, would impact adversely on the subject or the interpretation of the study data * Creatinine clearance \< 60 mL/min * Aspartate aminotransferase (AST) \> 1.5 x upper limit of normal (ULN) * Alanine aminotransferase (ALT) \> 1.5 x ULN * Bilirubin \> 1.5 x ULN

Design outcomes

Primary

MeasureTime frameDescription
Incidence of adverse events (AEs)7-21 days after drug administrationAdverse events will be summarized as the number and percentage of patients with each type of adverse event, per Criteria for Adverse Events version 5.0.

Secondary

MeasureTime frameDescription
Number of subjects without tumor fluorescence after receiving tozuleristideUp to 12 months
Sensitivity of tozuleristide fluorescence to detect tumor in tissue biopsiesUp to 12 monthsWill be estimated by a repeated measure logistic regression modeling the probability of positive tumor. The model includes an exchangeable working correlation structure to account for potential correlations of biopsies within subject for the tumor-positive tissue biopsies. A general estimating equation (GEE) method will be used to estimate the regression parameters.
Specificity of tozuleristide fluorescence to detect tumor in tissue biopsiesUp to 12 monthsWill be estimated by a repeated measure logistic regression modeling the probability of negative tumor. The model includes an exchangeable working correlation structure to account for potential correlations of biopsies within subject for the tumor-positive tissue biopsies. A GEE method will be used to estimate the regression parameters. The repeated measures logistic regression will model the probability of tumor-negative biopsies.
Positive predictive value of tozuleristide fluorescence to detect tumor in tissue biopsiesUp to 12 months
Negative predictive value of tozuleristide fluorescence to detect tumor in tissue biopsiesUp to 12 months
Achievement of negative margins in tozuleristide-guided oral cavity tumor excisionUp to 12 monthsTo investigate the accuracy of tozuleristide fluorescent imaging in identifying tumor and achieving negative margins during excision of oral cavity squamous cell carcinoma and high-grade dysplasia.

Countries

United States

Contacts

PRINCIPAL_INVESTIGATOREmily Marchiano

Fred Hutch/University of Washington Cancer Consortium

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 27, 2026