Dermal cells distribution on laser-structured ormosils.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Current dermal substitutes for skin grafting have limitations in take rate and vascularization.
• There is a need for improved artificial dermis scaffolds that promote better cell integration and faster healing.

Purpose of the Study:

• To characterize novel two-dimensional scaffolds fabricated by two-photon polymerization (2PP) of ormosil hybrid materials for tissue engineering.
• To evaluate the potential of these ormosil scaffolds as a 'dermal equivalent' for skin grafting applications.

Main Methods:

• Ormosil hybrid materials were photopolymerized using a Ti:sapphire laser via two-photon polymerization (2PP) to create 2D scaffolds with controlled architectures.
• Human dermal fibroblasts were cultured on the scaffolds to assess proliferation and orientation using fluorescence microscopy.
• Co-culture experiments with melanocytes and organotypic cultures with keratinocytes were performed to evaluate the interaction with epidermal cells.

Main Results:

• Two-photon polymerization (2PP) successfully fabricated polymeric structures with controlled architectures from ormosil materials.
• Human dermal fibroblasts proliferated on the scaffolds, with their orientation guided by the scaffold's geometric design (lines or grids).
• The ormosil scaffolds supported productive interactions between fibroblasts and both melanocytes and keratinocytes, with keratinocyte growth sustained for up to 8 days.

Conclusions:

• Ormosil-based 2D scaffolds fabricated by 2PP are suitable for in vitro culture and proliferation of human dermal fibroblasts.
• These scaffolds can serve as a 'dermal equivalent', effectively supporting the growth and interaction of epidermal cells (melanocytes and keratinocytes).
• The developed scaffolds represent a promising advancement in artificial dermis technology for skin tissue engineering and grafting applications.