Electrically Conductive Micropatterned Polyaniline-Poly(ethylene glycol) Composite Hydrogel

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Micropatterned hydrogels influence cell behavior, impacting proliferation and differentiation.
• Electrically conductive hydrogels can mimic native muscle tissue environments.
• Developing functional substrates is crucial for advancing regenerative medicine.

Purpose of the Study:

• To create electrically conductive hydrogel micropatterns using polyaniline (PANi) and poly(ethylene glycol) (PEG).
• To investigate the effect of these conductive micropatterns on C2C12 myoblast adhesion and myogenic differentiation.
• To assess the potential of PANi/PEG hydrogels as substrates for functionalizing myogenic cells.

Main Methods:

• Incorporation of polyaniline (PANi) into a poly(ethylene glycol) (PEG) hydrogel matrix.
• UV-induced photolithography with photomasks to generate micropatterns rapidly.
• Electrical conductance measurement of the PANi/PEG hydrogel.
• Culture of C2C12 myoblasts on the micropatterned substrate and induction of myogenic differentiation.

Main Results:

• Electrically conductive PANi/PEG hydrogel micropatterns were fabricated in seconds with a conductance of 30.5 ± 0.5 mS/cm.
• C2C12 myoblasts selectively adhered to the PANi/PEG hydrogel regions.
• Myotube alignment corresponded to the line pattern, and myosin heavy chain expression was observed.

Conclusions:

• PANi/PEG hydrogel micropatterns provide a conductive substrate that supports selective cell adhesion.
• The patterned conductive hydrogels effectively promote and guide myogenic differentiation of C2C12 cells.
• These findings highlight the potential of conductive hydrogel micropatterns for muscle tissue engineering and cell functionalization.