Molecularly Imprinted Silk Fibroin Nanoparticles

Area of Science:

• Biomaterials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Molecularly imprinted nanoparticles (MIP-NPs) show promise as synthetic antibodies for medical applications.
• Current MIP-NPs often use soft matter, limiting their clinical biocompatibility.
• Silk fibroin is a natural, non-toxic, and highly biocompatible polymer.

Purpose of the Study:

• To synthesize fully biocompatible molecularly imprinted nanoparticles from silk fibroin (MIP SF-NPs).
• To optimize MIP SF-NP production for controlled sizes (around 50 nm and 100 nm).
• To demonstrate the creation of specific recognition sites on the nanoparticles and assess their biofunctionality.

Main Methods:

• Utilized molecular imprinting (template-assisted synthesis) to create recognition sites.
• Employed silk fibroin as the base material for nanoparticle synthesis.
• Applied the response surface method to control nanoparticle size.
• Characterized nanoparticle recognition site affinity and selectivity.
• Evaluated the non-toxicity of the synthesized nanoparticles.

Main Results:

• Successfully synthesized biocompatible MIP SF-NPs with mean sizes of approximately 50 nm and 100 nm.
• Demonstrated the imprinting of a single, high-affinity (KD = 57 × 10⁻⁹ M) and selective recognition site per nanoparticle.
• Confirmed the non-toxic nature of the MIP SF-NPs.
• Successfully decorated silk microfibers and nanofibers with MIP SF-NPs, imparting biofunctionalities.

Conclusions:

• Fully biocompatible molecularly imprinted nanoparticles can be synthesized from silk fibroin.
• MIP SF-NPs possess specific recognition capabilities and are non-toxic, suitable for biomedical applications.
• MIP SF-NPs offer a versatile platform for functionalizing silk-based materials for advanced applications.