Reconstitution of skin fibrosis development using a tissue engineering approach

Area of Science:

• Tissue Engineering
• Dermatology
• Biopathology

Background:

• Skin fibrosis, seen in conditions like hypertrophic scars and scleroderma, lacks adequate in vivo models for mechanistic study.
• Current in vitro methods using 2D cell cultures on plastic do not accurately reflect in vivo cellular behavior within a matrix.
• The absence of suitable animal models necessitates the development of more physiologically relevant in vitro systems.

Purpose of the Study:

• To develop novel in vitro models for studying skin fibrosis pathologies.
• To create three-dimensional (3D) reconstructed skin tissues that better mimic the in vivo microenvironment.
• To provide detailed protocols for generating these advanced fibrotic skin models.

Main Methods:

• Utilized a tissue engineering strategy based on the self-assembly approach.
• Cultured human pathological skin cells (keratinocytes and fibroblasts) from small biopsies.
• Reconstituted 3D fibrotic tissues, including dermal and epidermal components, mimicking native skin structure.

Main Results:

• Successfully generated 3D reconstructed fibrotic skin tissues in vitro.
• Developed protocols for isolating and culturing human skin cells for tissue reconstruction.
• Established methods for producing fibrotic dermal sheets, with or without associated epidermis.

Conclusions:

• The self-assembly approach enables the creation of physiologically relevant 3D in vitro models of skin fibrosis.
• These engineered tissues overcome limitations of 2D cultures and scarce animal models.
• The developed protocols facilitate the study of skin fibrosis mechanisms using human pathological cells.