Light-Regulated Cancer Immunotherapy Using Individually Encapsulated Synthetic Circuit-Engineered Cells

Area of Science:

• Biomedical Engineering
• Immunotherapy
• Cancer Research

Background:

• Clinical efficacy of cell therapy for cancer is limited by poor cell survival, homing, and immune clearance.
• Existing methods lack precise control over therapeutic protein expression and cell protection in vivo.

Purpose of the Study:

• To develop a novel light-controlled immunotherapy strategy combining a red/far-red light genetic switch with single-cell encapsulation.
• To enhance the survival and therapeutic efficacy of engineered cells for cancer immunotherapy.

Main Methods:

• Integration of a reversible red/far-red light (660/730 nm) genetic switch for spatiotemporal control of therapeutic protein expression.
• Application of mild enzyme-mediated single-cell encapsulation to form a protective hydrogel coating in situ.
• Utilizing HRP-pHLIP membrane anchoring and HA-dopamine enzymatic crosslinking for rapid, gentle cell surface gelation.

Main Results:

• Demonstrated precise spatiotemporal control over therapeutic protein expression in engineered cells using light.
• Successfully enhanced transplanted cell survival by overcoming in vivo challenges like hypoxia and inflammation.
• Achieved improved therapeutic outcomes without genomic modification of cells.

Conclusions:

• The developed strategy offers a new paradigm for safe, controllable, and efficient cancer immunotherapy.
• Combines precise gene expression regulation with physical cell protection for enhanced therapeutic efficacy.
• Provides a versatile platform for on-demand activation of anti-tumor immune responses.