DNA-Templated Anchoring of Proteins for Programmable Cell Functionalization and Immunological Response

Area of Science:

• Biotechnology
• Cell Biology
• Immunotherapy

Background:

• Genetic engineering of membrane proteins for cell functionalization faces challenges like insertional mutagenesis and complex procedures.
• Existing methods offer limited tunability for precise control over membrane protein density and interactions.

Purpose of the Study:

• To develop a DNA-templated method for anchoring exogenous proteins onto living cell membranes.
• To enable programmable cell functionalization with enhanced control over protein characteristics.

Main Methods:

• Utilized DNA as a scaffold to anchor proteins onto model cell membranes.
• Employed DNA hybridization for precise control over protein density, ratio, and interactions.
• Engineered natural killer (NK) cells to target immune checkpoint signaling at the NK-tumor synapse.

Main Results:

• Achieved precise control over membrane protein density, ratio, and interactions via DNA hybridization.
• Successfully engineered NK cells to eliminate immune checkpoint signaling, enhancing NK cell activation.
• Demonstrated a versatile platform for programmable cell engineering.

Conclusions:

• DNA-templated anchoring offers a tunable and efficient strategy for cell membrane functionalization.
• This method holds significant potential for advancing cell-based therapies, particularly in immunotherapy.
• The approach facilitates the integration of exogenous proteins for tailored cell functions.