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Functional Polylactide Blend Films for Controlling Mesenchymal Stem Cell Behaviour.

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  • 1Institute of Cytology of the Russian Academy of Sciences, Center of Cell Technologies, 194064 Saint Petersburg, Russia.

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|September 3, 2020
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Summary

This study explored blending polylactic acid (PLA) and polyethylene glycol (PEG) for biocompatible films. PLA/PEG-NH2 films enhanced human mesenchymal stem cell adhesion and spreading, showing promise for tissue engineering applications.

Keywords:
blend filmsmesenchymal stem cellspoly(lactic acid)polyethylene glycolpolyethylene glycol diamine

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Tissue Engineering

Background:

  • Polymer blending offers a versatile method for creating novel materials with tailored properties.
  • Polylactic acid (PLA) and polyethylene glycol (PEG) blends are explored for their potential in biomedical applications.
  • Biocompatible materials are crucial for successful cell cultivation and tissue regeneration.

Purpose of the Study:

  • To investigate the impact of different isomeric forms of PLA and PEG on blend film properties.
  • To evaluate the suitability of these blend films for human mesenchymal stem cell (hMSC) cultivation.
  • To determine the optimal PLA-PEG blend composition for enhanced cell adhesion and spreading.

Main Methods:

  • Preparation of blend films using various isomeric forms of PLA and PEG.
  • Surface morphology analysis using scanning electron microscopy (SEM).
  • Chemical characterization of blend films using Fourier transform infrared (FTIR) spectroscopy.
  • Cell culture studies using hMSCs and fluorescence microscopy to assess cell behavior.

Main Results:

  • SEM revealed significant surface topology changes with poly(d,l-lactide) and high molecular weight PEG (15,000 g/mol).
  • FTIR confirmed the presence of PEG (hydroxyl and amino groups) in blend films after water incubation.
  • Blend films of PLA and polyethylene glycol diamine (PEG-NH2) demonstrated superior cell spreading and focal contact formation compared to pure PLA films.

Conclusions:

  • PLA and PEG blends, particularly with PEG-NH2, create biocompatible surfaces conducive to cell growth.
  • The surface characteristics of PLA/PEG blends can be tuned by isomeric form and molecular weight, influencing cell interactions.
  • These findings highlight the potential of tailored PLA-PEG blend films for advanced cell culture and regenerative medicine applications.