A poly (saccharide-ester-urethane) scaffold for mammalian cell growth

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Polymer Chemistry

Background:

• Chitosan and poly(3-hydroxybutyrate) are biocompatible polymers used in regenerative medicine.
• The cellular response of combined chitosan and poly(3-hydroxybutyrate) biomaterials in mammalian cells is not well understood.
• Novel biomaterials are needed to support diverse cellular functions for tissue engineering.

Purpose of the Study:

• To evaluate a novel salt-leached polyurethane scaffold combining chitosan and poly(3-hydroxybutyrate).
• To assess the scaffold's ability to support the growth and viability of HEK-293 cells, i28 mouse myoblasts, and human dermal fibroblasts in vitro.
• To determine the cellular response to this poly(saccharide-ester-urethane) derivative for potential regenerative medicine applications.

Main Methods:

• Fabrication of a salt-leached polyurethane scaffold with grafted chitosan and poly(3-hydroxybutyrate).
• Culturing of three mammalian cell lines (HEK-293, i28 mouse myoblasts, human dermal fibroblasts) on the scaffold.
• Assessment of cell viability using green fluorescent protein expression, esterase activity, and plasma membrane integrity.
• Evaluation of i28 myoblast differentiation and cell growth cessation.

Main Results:

• All three tested mammalian cell lines demonstrated good attachment to the chitosan-poly(3-hydroxybutyrate) scaffold.
• HEK-293 cells and human dermal fibroblasts exhibited sustained viability and growth on the scaffold.
• i28 mouse myoblasts failed to produce distinct myofibers upon differentiation induction, and their growth was arrested.

Conclusions:

• The developed chitosan-poly(3-hydroxybutyrate) foam scaffold supports the attachment, growth, and proliferation of certain mammalian cell types.
• The scaffold's current formulation may not be suitable for supporting the differentiation of all cell types, specifically i28 mouse myoblasts.
• Further research is needed to develop poly(saccharide-ester-urethane) derivatives with tailored nano-topography for broader biological applicability in regenerative medicine.