Self-Assembling Peptide-Based Hydrogel: Regulation of Mechanical Stiffness and Thermal Stability and 3D Cell Culture of Fibroblasts

Dipayan Bairagi, Parijat Biswas, Kingshuk Basu, Soumyajit Hazra, Daniel Hermida-Merino, Deepak Kumar Sinha, Ian W. Hamley, Arindam Banerjee

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

A histidine-containing peptide-based amphiphile (P1) forms a transparent hydrogel within a pH range of 5.5 to 8.5 in phosphate buffer solution. Interestingly, thermal stability and mechanical stiffness are modulated by incorporating different types of dicarboxylic acids into the hydrogels. Inclusion of succinic acid with the molar ratio 2:1 (peptide:dicarboxylic acid) yields improved properties compared to the other tested dicarboxylic acids such as oxalic, glutaric and octanedioic acids. Transmission electron microscopic (TEM) images show the assembly of nanospheres is responsible for the hydrogel obtained from the assembly of native peptide. However, a morphological transformation takes place from nanosphere to nanofibers, when the peptide gels with succinic acid. XRD and FT-IR studies reveal interactions between peptide amphiphiles and the acids are responsible for the formation of a two-component hydrogel. Gel stiffness is enhanced considerably upon the addition of succinic acid to P1 with a 1:2 molar ratio. The two-component gel consisting of peptide and succinic acid has been successfully used for three-dimensional cell culture using mouse fibroblast cell line (NIH-3T3). This indicates future promise for the application of such peptide-based gels as tunable biomaterials in cell culture and regenerative medicine.

Original languageEnglish
Pages (from-to)5235-5244
Number of pages10
JournalACS Applied Bio Materials
Volume2
Issue number12
DOIs
StatePublished - 16 Dec 2019
Externally publishedYes

Keywords

  • cell culture
  • morphological transformation
  • peptide gels
  • self-assembly
  • tuning of gel stiffness

ASJC Scopus subject areas

  • Biochemistry, medical
  • General Chemistry
  • Biomedical Engineering
  • Biomaterials

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