Comparison of PET imaging with 64Cu-liposomes and 18F-FDG in the 7,12-dimethylbenz[a]anthracene (DMBA)-induced hamster buccal pouch model of oral dysplasia and squamous cell carcinoma.
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
PURPOSE: Currently, 2-deoxy-2-[(18)F]fluoro-D-glucose ((18)F-FDG) is the gold standard radiotracer for staging of head and neck cancer; however, the low sensitivity of this tracer can impede detection of early lesions. (64)Cu-liposomes accumulate in various cancers and provide both a sensitive tracer and an indication of the biodistribution of nanotherapeutics. Here, the accumulation of (64)Cu-liposomes in early and established cancers is assessed and compared with (18)F-FDG in a head and neck cancer model. METHODS: Lesions ranging from mild dysplasia to squamous cell carcinoma were induced in a hamster model of head and neck cancer by topical application of 7,12-dimethylbenz[a]anthracene to the buccal pouch. The hamsters were imaged with micro-positron emission tomography using (18)F-FDG and (64)Cu-liposomes. RESULTS: At 24 h postinjection, (64)Cu-liposome accumulation exceeded the accumulation of (18)F-FDG in every pathologic grade. The lesion-to-cheek pouch (background) ratio and lesion-to-brain ratio were also higher for (64)Cu-liposomes than for (18)F-FDG. CONCLUSION: Imaging of a nanotracer such as (64)Cu-liposomes can improve the visualization of head and neck tumors. Accumulation of liposomal particles in head and neck tumors over various pathologic grades averaged 3.5%ID/cc demonstrating the potential for liposomal therapy with targeted chemotherapeutic agents.
Mahakian, L. M., Farwell, D. G., Zhang, H., Seo, J. W., Poirier, B., Tinling, S. P., ... Ferrara, K. W.
citation count
25
complete list of authors
Mahakian, Lisa M||Farwell, D Gregory||Zhang, Hua||Seo, Jai Woong||Poirier, Brian||Tinling, Steven P||Afify, Alaa M||Haynam, Eric M||Shaye, David||Ferrara, Katherine W