Cysteine modified polyaniline films improve biocompatibility for two cell lines

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Conjugated conducting polymers offer exciting applications in cell culture and tissue engineering.
• Improving the biocompatibility of these polymers is crucial for their successful integration into biological systems.

Purpose of the Study:

• To synthesize and characterize polyaniline (PANI) films modified with l-cysteine (PANI-Cys) for enhanced biocompatibility.
• To evaluate the potential of PANI-Cys films as substrates for cell culture and tissue engineering.

Main Methods:

• Polyaniline (PANI) films were synthesized on Polyethylene terephthalate (PET) and modified with l-cysteine.
• Fourier Transform Infrared (FTIR) and UV-Visible spectroscopy were used for characterization.
• Contact angle measurements assessed hydrophilicity changes.
• Cell adhesion and morphology studies were performed using LM2 and HaCaT cell lines via fluorescence and Atomic Force Microscopy (AFM).

Main Results:

• PANI-Cys films exhibited increased hydrophilicity compared to unmodified PANI films.
• PANI-Cys demonstrated superior biocompatibility, promoting better adhesion and growth of both LM2 and HaCaT cell lines.
• Cell morphology on PANI-Cys films was comparable to that on tissue culture plastic (TCP), indicating normal cellular behavior.

Conclusions:

• Cysteine modification of polyaniline (PANI-Cys) effectively enhances the biocompatibility of polymer films.
• PANI-Cys films support normal cell attachment, proliferation, and morphology, indicating their potential as advanced substrates for cell culture and tissue engineering applications.