Sonazoid-Conjugated Natural Killer Cells for Tumor Therapy and Real-Time Visualization by Ultrasound Imaging

Area of Science:

• Oncology
• Immunotherapy
• Biomedical Engineering

Background:

• Cell therapies like CAR-T and NK cells show promise for tumor eradication.
• The efficacy of cell therapies against solid tumors is limited and requires improvement.
• Real-time tracking and control of therapeutic cells could enhance treatment outcomes.

Purpose of the Study:

• To engineer and evaluate ultrasound-visualizable NK cells for solid tumor therapy.
• To assess the feasibility of using Sonazoid microbubble-conjugated NK cells (NK_Sona) for real-time monitoring.
• To determine if NK_Sona cells maintain their anti-tumor functions and improve therapeutic efficacy.

Main Methods:

• Conjugation of Sonazoid microbubbles to NK cells to create NK_Sona cells.
• In vitro assessment of NK_Sona cell viability and cytotoxicity.
• In vivo evaluation of NK_Sona cell detectability using ultrasound imaging and their anti-tumor effects.

Main Results:

• NK_Sona cells were successfully engineered and detectable by ultrasound in real-time.
• Sonazoid conjugation did not compromise NK cell cytotoxicity or viability in vitro.
• NK_Sona cells demonstrated tumor growth inhibition in vivo and were visualized via ultrasound.

Conclusions:

• This study demonstrates the feasibility of using ultrasound-visualizable NK cells for solid tumor treatment.
• Sonazoid microbubble conjugation offers a novel strategy for real-time monitoring of therapeutic cells.
• This approach holds potential for improving the efficacy of cell-based cancer therapies.