Preparation of a Multiple-Targeting NIR-Based Fluorogenic Probe and Its Application for Selective Cancer Cell Imaging

Area of Science:

• Biomedical Imaging
• Molecular Imaging
• Cancer Diagnostics

Background:

• Improving cancer selectivity in imaging agents is crucial for accurate diagnosis.
• Current imaging agents may lack specificity, leading to interference from normal cells.
• Near-infrared (NIR) imaging offers advantages for deep tissue penetration and reduced autofluorescence.

Purpose of the Study:

• To develop a novel triple-targeting, near-infrared (NIR) based fluorogenic probe for enhanced cancer cell selectivity.
• To create an imaging agent capable of distinguishing cancer cells from normal cells without interference.
• To validate the probe's performance in cell studies for NIR imaging applications.

Main Methods:

• Synthesis of a novel fluorogenic probe, Oct-FK(PBA)-NIR, incorporating multiple targeting moieties.
• The probe design includes octreotide (somatostatin receptor ligand), a H2O2-responsive phenylboronic acid (PBA), and a cathepsin B dipeptide substrate.
• Utilized a near-infrared (NIR) fluorophore for signal detection.

Main Results:

• The synthesized probe, Oct-FK(PBA)-NIR, demonstrated triple-targeting capabilities.
• Cell studies confirmed the probe's ability to selectively image cancer cells.
• Effective differentiation of cancer cells from normal cells was achieved within the NIR imaging range.

Conclusions:

• The Oct-FK(PBA)-NIR probe represents a significant advancement in targeted cancer imaging.
• This probe offers high selectivity for cancer cells, minimizing background noise from normal tissues.
• The developed fluorogenic probe shows promise for improved cancer diagnostics using NIR imaging.