Modulation of scar tissue formation in injured nervous tissue cultivated on surface-engineered coralline scaffolds

Orly Eva Weiss, Roni Mina Hendler, Eyal Aviv Canji, Tzachy Morad, Maytal Foox, Yitshak Francis, Zvy Dubinski, Ido Merfeld, Liat Hammer, Danny Baranes

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Following traumatic brain injury, there is no restoration of the lost nervous tissue, mainly due to the formation of a scar. One promising strategy to overcome this hurdle is grafting scaffolds that can disturb the scar blockade, enabling cell invasion into the wound. The aragonite skeleton of corals is useful scaffolds for testing this strategy, being supportive for neural cells in culture. The purpose of this work was to check if a contact between a coralline scaffold and an injured nervous tissue affects scar formation and if this effect can be regulated by engineering the scaffold's surface topology. To address that, hippocampal slices were cultivated on a coral skeleton having two distinct surface shapes: (1) intact skeleton pieces (ISP): porous, microrough surface; (2) grained skeleton (GS): nonporous, macrorough surface. On ISP, slices deformed by engulfing the scaffold's outer surface without penetrating the pores, yet, they preserved their coherence. By contrast, on GS slices were flat, but broken into interconnected small segments of tissue. In addition, whereas on ISP astrocytes were significantly more active and diffusely distributed, on GS reactive astrocytes tightened into a single <90 μm wide scar-like stripe at the slice's periphery. Hence, by grafting coralline scaffolds of predesigned surface roughness and porosity into brain wounds, control over scar tissue formation can be gained, providing an opportunity for cell migration and damage repair.

Original languageEnglish
Pages (from-to)2295-2306
Number of pages12
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume106
Issue number6
DOIs
StatePublished - 1 Aug 2018
Externally publishedYes

Keywords

  • biomaterial scaffolds
  • coral
  • reactive astrocytes
  • scar tissue
  • traumatic brain injury

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

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