Multivalent Cucurbituril Dendrons for Cell Membrane Engineering with Supramolecular Receptors

Area of Science:

• Supramolecular chemistry
• Biomaterials science
• Chemical biology

Background:

• Supramolecular host-guest recognition, exemplified by Cucurbit[7]uril (CB[7]) macrocycles, exhibits high binding affinities comparable to biological interactions like biotin-avidin.
• The spatial localization of guest-linked agents using CB[7] in vivo presents opportunities for biomedical applications.

Purpose of the Study:

• To engineer synthetic supramolecular "membrane receptors" by functionalizing cell membranes.
• To demonstrate the targeted delivery of guest-linked agents to cell membranes using a novel dendritic CB[7] construct.

Main Methods:

• Preparation of CB[7] architectures on a polyamidoamine (PAMAM) dendrimer scaffold.
• Attachment of a PEG-linked cholesterol anchor for cell membrane integration.
• Modification of cells in vitro with the dendritic CB[7] construct to create synthetic membrane receptors.

Main Results:

• Successful integration of dendritic CB[7] constructs into cell membranes.
• Demonstration of targeted delivery of a model guest-linked agent to the modified cell membrane.
• Establishment of a synthetic supramolecular recognition axis on the cell surface.

Conclusions:

• The developed synthetic supramolecular membrane receptors offer a novel platform for precise control over molecular interactions at the cell surface.
• This approach holds potential for future applications in in situ imaging, modulation of cell-based therapies, and synthetic biology.