[The effect of microencapsulated NGF-expressing NIH-3T3 cells on bioengineered dermis function in vitro]

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Context:

• Peripheral nerve regeneration and wound healing are critical clinical challenges.
• Bioengineered tissues offer promising therapeutic strategies.
• Nerve growth factor (NGF) is a key neurotrophin for nerve repair and wound healing.

Purpose:

• To develop and evaluate bioengineered dermis incorporating microencapsulated NGF-expressing NIH-3T3 cells.
• To assess the impact of these microcapsules on the quality of the bioengineered dermis and its constituent cells.

Summary:

• NGF-expressing NIH-3T3 cells were encapsulated in alginate-poly-L-lysine-alginate (APA) microcapsules.
• These microcapsules demonstrated sustained NGF secretion in vitro for 8 weeks.
• Co-culture with epidermal and fibroblast cells showed enhanced proliferation and collagen production, respectively.
• The microcapsules successfully improved the characteristics of the constructed bioengineered dermis, as evidenced by MTT assays, hydroxyproline content, HE staining, and ultrastructure.

Impact:

• This study presents a viable method for enhancing bioengineered dermis using NGF-delivering microcapsules.
• The findings suggest potential applications in regenerative medicine for improved wound healing and nerve repair.
• The developed system offers a stable and effective platform for sustained delivery of therapeutic growth factors in tissue engineering.