Author/Authors :
Payne, William M Department of Pharmaceutical Sciences - University of Nebraska Medical Center - Omaha, USA , Hill, Tanner K Department of Pharmaceutical Sciences - University of Nebraska Medical Center - Omaha, USA , Svechkarev, Denis Department of Pharmaceutical Sciences - University of Nebraska Medical Center - Omaha, USA , Holmes, Megan B Department of Pharmaceutical Sciences - University of Nebraska Medical Center - Omaha, USA , Sajja, Balasrinivasa R Department of Radiology - University of Nebraska Medical Center - Omaha, USA , Mohs, Aaron M Department of Pharmaceutical Sciences - University of Nebraska Medical Center - Omaha, USA
Abstract :
Surgical resection remains the most promising treatment strategy for many types of cancer. Residual malignant tissue after surgery, a
consequence in part due to positive margins, contributes to high mortality and disease recurrence. In this study, multimodal contrast
agents for integrated preoperative magnetic resonance imaging (MRI) and intraoperative fluorescence image-guided surgery (FIGS)
are developed. Self-assembled multimodal imaging nanoparticles (SAMINs) were developed as a mixed micelle formulation using
amphiphilic HA polymers functionalized with either GdDTPA for 𝑇1 contrast-enhanced MRI or Cy7.5, a near infrared fluorophore.
To evaluate the relationship between MR and fluorescence signal from SAMINs, we employed simulated surgical phantoms that are
routinely used to evaluate the depth at which near infrared (NIR) imaging agents can be detected by FIGS. Finally, imaging agent
efficacy was evaluated in a human breast tumor xenograft model in nude mice, which demonstrated contrast in both fluorescence
and magnetic resonance imaging.
Keywords :
Hyaluronic , Multimodal , NIR , MRI
