Near-Infrared Optical Imaging of Nucleic Acid Nanocarriers In Vivo

Area of Science:

• Biomedical imaging
• Molecular biology
• Nanotechnology

Background:

• Noninvasive optical imaging offers real-time tracking of nucleic acid nanocarriers in vivo.
• Small animal imaging devices facilitate longitudinal studies using bioluminescence and fluorescence measurements.

Purpose of the Study:

• To guide the selection of near-infrared (NIR) fluorophores for FRET assays and reporter gene imaging.
• To provide methods for labeling nanocarriers and their payloads for in vivo gene and siRNA delivery studies.

Main Methods:

• Utilizing bioluminescence and NIR fluorescence imaging in mice.
• Developing protocols for labeling macromolecules and their payloads.
• Selecting appropriate fluorophores for Förster Resonance Energy Transfer (FRET) assays.

Main Results:

• Demonstrated the utility of optical imaging for tracking nanocarrier distribution and dissociation in vivo.
• Presented effective labeling strategies for nucleic acid nanocarriers and their genetic payloads.
• Established protocols for detecting nanocarriers and gene expression using bioluminescence and NIR fluorescence.

Conclusions:

• Noninvasive optical imaging is a powerful tool for evaluating in vivo nucleic acid nanocarrier delivery and gene expression.
• The presented guidelines and protocols facilitate the application of NIR fluorophores and imaging techniques in nanomedicine research.