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Issue 35, 2017
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Poly(ε-caprolactone) with pendant natural peptides: an old polymeric biomaterial with new properties

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Abstract

The bio-functionalization of poly(ε-caprolactone) (PεCL) provides an approach to broaden the applications of the polymer in medical and biological engineering fields. In this research, PεCL with pendant glutathione (GSH) or L-carnosine was synthesized by a combination of ring-opening copolymerization, Cu(I)-catalyzed Huisgen 1,3-dipolar cycloaddition reaction (click reaction) and thiol-disulfide exchange reaction. The ring-opening copolymerization of εCL and α-chloro-ε-caprolactone (αCl-εCL) was employed in the synthesis of the PεCL-co-P(αCl-εCL) copolymer. The pendent chlorides were converted into azides by a reaction with sodium azide. N-Hydroxysuccinimide (NHS) groups were introduced into the polymer backbones by the click reaction. PεCL with pendant pyridyl disulfide groups was prepared by a reaction of N-hydroxysuccinimide (NHS) activated ester and pyridine dithioethylamine. Peptide modified PεCL were synthesized by thiol-disulfide exchange reactions between thiol groups on GSH (or thiol-modified L-carnosine) and the pendant pyridyl disulfide groups on the polymer chains. The synthesized copolymers were analyzed by size exclusion chromatography, FTIR, 1H NMR and differential scanning calorimetry. The bio-graft copolymers are able to self-assemble into micelles or vesicles in aqueous solutions, depending on the pH values of the solutions. The assembled structures formed by the bio-graft copolymers in aqueous solutions are essentially nontoxic toward MCF-7 and COS-7 cells. The functionalization of the peptide-stabilized assembled structures with lysozyme was also investigated in this research.

Graphical abstract: Poly(ε-caprolactone) with pendant natural peptides: an old polymeric biomaterial with new properties

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Publication details

The article was received on 17 Jun 2017, accepted on 31 Jul 2017 and first published on 01 Aug 2017


Article type: Paper
DOI: 10.1039/C7PY01012E
Citation: Polym. Chem., 2017,8, 5415-5426
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    Poly(ε-caprolactone) with pendant natural peptides: an old polymeric biomaterial with new properties

    Y. Ju, M. Zhang and H. Zhao, Polym. Chem., 2017, 8, 5415
    DOI: 10.1039/C7PY01012E

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