Biomimetic hydrogel blanket for conserving and recovering intrinsic cell properties

Seung Hoon Um, Youngmin Seo, Hyunseon Seo, Kyungwoo Lee, Sun Hwa Park, Jung Ho Jeon, Jung Yeon Lim, Myoung Ryul Ok, Yu Chan Kim, Hyunjung Kim, Cheol Hong Cheon, Hyung Seop Han, James R. Edwards, Sung Won Kim, Hojeong Jeon

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Background: Cells in the human body experience different growth environments and conditions, such as compressive pressure and oxygen concentrations, depending on the type and location of the tissue. Thus, a culture device that emulates the environment inside the body is required to study cells outside the body. Methods: A blanket-type cell culture device (Direct Contact Pressing: DCP) was fabricated with an alginate-based hydrogel. Changes in cell morphology due to DCP pressure were observed using a phase contrast microscope. The changes in the oxygen permeability and pressure according to the hydrogel concentration of DCP were analyzed. To compare the effects of DCP with normal or artificial hypoxic cultures, cells were divided based on the culture technique: normal culture, DCP culture device, and artificial hypoxic environment. Changes in phenotype, genes, and glycosaminoglycan amounts according to each environment were evaluated. Based on this, the mechanism of each culture environment on the intrinsic properties of conserving chondrocytes was suggested. Results: Chondrocytes live under pressure from the surrounding collagen tissue and experience a hypoxic environment because collagen inhibits oxygen permeability. By culturing the chondrocytes in a DCP environment, the capability of DCP to produce a low-oxygen and physical pressure environment was verified. When human primary chondrocytes, which require pressure and a low-oxygen environment during culture to maintain their innate properties, were cultured using the hydrogel blanket, the original shapes and properties of the chondrocytes were maintained. The intrinsic properties could be recovered even in aged cells that had lost their original cell properties. Conclusions: A DCP culture method using a biomimetic hydrogel blanket provides cells with an adjustable physical pressure and a low-oxygen environment. Through this technique, we could maintain the original cellular phenotypes and intrinsic properties of human primary chondrocytes. The results of this study can be applied to other cells that require special pressure and oxygen concentration control to maintain their intrinsic properties. Additionally, this technique has the potential to be applied to the re-differentiation of cells that have lost their original properties.

Original languageEnglish
Article number78
JournalBiomaterials Research
Volume26
Issue number1
DOIs
Publication statusPublished - 2022 Dec

Bibliographical note

Funding Information:
This work was supported by the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health and Welfare (HI16C0133), KIST project (2E31121), and KU-KIST Graduate School of Converging Science and Technology Program.

Publisher Copyright:
© 2022, The Author(s).

Keywords

  • Biomimetic
  • Cell culture system
  • Conserving and recovering cell properties
  • Hydrogel blanket
  • Physical stimuli

ASJC Scopus subject areas

  • Ceramics and Composites
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

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