Enhanced stem cell pluripotency in surface-modified electrospun fibrous matrices.

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Surface Chemistry

Background:

• Embryonic stem cells (ES cells) require specific surface conditions for self-renewal and pluripotency maintenance.
• Previous 2D surface chemistry screening identified N-[3-(dimethylamino)propyl] methacrylamide as optimal for ES cell attachment and self-renewal.
• Scaling up successful 2D surface chemistries to 3D scaffolds is crucial for applications like regenerative medicine.

Purpose of the Study:

• To graft a previously identified optimal ES cell surface chemistry onto poly(ether sulfone) (PES) fibrous matrices.
• To evaluate the performance of these 3D modified fibrous matrices in supporting mouse ES cell growth and pluripotency.
• To demonstrate the successful scale-up of 2D optimized surface chemistry to a 3D format for enhanced stem cell culture.

Main Methods:

• Plasma-induced graft polymerization was used to immobilize N-[3-(dimethylamino)propyl] methacrylamide onto PES fibrous matrices.
• Mouse ES cells were cultured on both 2D membranes and the 3D modified fibrous matrices.
• Cell proliferation and the expression of pluripotency markers were assessed using quantitative assays.

Main Results:

• The 3D modified fibrous matrices demonstrated significantly higher mouse ES cell proliferation compared to 2D membranes.
• Enhanced expression of pluripotency markers was observed in ES cells cultured on the 3D scaffolds.
• The grafted surface chemistry effectively supported long-term self-renewal of ES cells in a 3D environment.

Conclusions:

• The 3D poly(ether sulfone) fibrous matrices functionalized with N-[3-(dimethylamino)propyl] methacrylamide provide a superior microenvironment for mouse ES cell expansion.
• This study represents the first successful scale-up of an optimized 2D synthetic surface chemistry to a 3D format for pluripotent stem cell culture.
• The developed 3D material holds promise for advancing stem cell expansion technologies in regenerative medicine and drug discovery.