Transdermal Silk-Recombinant Collagen Nanocomplexes with Synergistic Bioactivity

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Dermatology

Background:

• Hydrophilic macromolecules offer therapeutic potential in regenerative medicine and cosmetics.
• Their application is limited by poor transdermal penetration.
• Silk nanofibers (SNF) exhibit promising transdermal capabilities.

Purpose of the Study:

• To develop a transdermal delivery system for hydrophilic macromolecules using SNF.
• To investigate the formation and properties of SNF-recombinant collagen XVII (RCL) nanocomplexes.
• To evaluate the efficacy of these nanocomplexes in skin repair.

Main Methods:

• Assembling recombinant collagen XVII (RCL) with silk nanofibers (SNF) to create nanocomplexes.
• Controlling nanostructure and size by varying the SNF:RCL ratio.
• Assessing transdermal capacity, skin barrier repair, and bioactivity in vitro and in vivo.
• Evaluating topical application of nanocomplex gels on photodamaged skin.

Main Results:

• SNF-RCL nanocomplexes exhibited controllable nanostructures and sizes.
• Optimal SNF:RCL ratios yielded significant transdermal capacity and skin barrier repair.
• Synergistic bioactivity was observed in SNF-RCL nanocomplexes.
• In vivo studies showed enhanced tissue healing of photodamaged skin with nanocomplex gels.

Conclusions:

• SNF can form effective transdermal delivery systems for hydrophilic macromolecules without compromising bioactivity.
• SNF-RCL nanocomplexes demonstrate potential for treating skin conditions requiring enhanced delivery.
• This approach offers a promising strategy for developing advanced transdermal therapies for skin diseases.