Composites Based on Poly(ε-caprolactone) and Graphene Oxide Modified with Oligo/Poly(Glutamic Acid) as Biomaterials with Osteoconductive Properties

authored by

Olga Solomakha, Mariia Stepanova, Iosif Gofman, Yulia Nashchekina, Maxim Rabchinskii, Alexey Nashchekin, Antonina Lavrentieva, Evgenia Korzhikova-Vlakh

Abstract

The development of new biodegradable biomaterials with osteoconductive properties for bone tissue regeneration is one of the urgent tasks of modern medicine. In this study, we proposed the pathway for graphene oxide (GO) modification with oligo/poly(glutamic acid) (oligo/poly(Glu)) possessing osteoconductive properties. The modification was confirmed by a number of methods such as Fourier-transform infrared spectroscopy, quantitative amino acid HPLC analysis, thermogravimetric analysis, scanning electron microscopy, and dynamic and electrophoretic light scattering. Modified GO was used as a filler for poly(ε-caprolactone) (PCL) in the fabrication of composite films. The mechanical properties of the biocomposites were compared with those obtained for the PCL/GO composites. An 18–27% increase in elastic modulus was found for all composites containing modified GO. No significant cytotoxicity of the GO and its derivatives in human osteosarcoma cells (MG-63) was revealed. Moreover, the developed composites stimulated the proliferation of human mesenchymal stem cells (hMSCs) adhered to the surface of the films in comparison with unfilled PCL material. The osteoconductive properties of the PCL-based composites filled with GO modified with oligo/poly(Glu) were confirmed via alkaline phosphatase assay as well as calcein and alizarin red S staining after osteogenic differentiation of hMSC in vitro.

Organisation(s)

Institute of Technical Chemistry

External Organisation(s)

Russian Academy of Sciences (RAS)
RAS - Institute of Cytology
RAS - Ioffe Physico Technical Institute

Type

Article

Journal

Polymers

Volume

15

ISSN

2073-4360

Publication date

17.06.2023

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Chemistry, Polymers and Plastics

Sustainable Development Goals

SDG 3 - Good Health and Well-being

Electronic version(s)

https://doi.org/10.3390/polym15122714 (Access: Open)