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Strategy to replace animal-derived ECM by a modular and highly defined matrix.

Yevheniia Nesterenko1,2, Xenia Dolde3,2, Marcel Leist3

  • 1Biophysics and Structural Biology, University of Konstanz, Konstanz, Germany.

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A novel recombinant extracellular matrix (ECM), ZTFn10, effectively supports neural crest cell (NCC) migration, matching traditional animal-derived fibronectin coatings. This engineered ECM offers a defined, animal-free alternative for toxicity testing and other bioassays.

Keywords:
biopolymer cell substratecell migrationdevelopmental cytotoxicityneural crest cells

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Toxicology

Background:

  • Current cell culture extracellular matrices (ECM) often rely on animal-derived components.
  • Recombinant protein production offers an alternative, with modular systems enabling customization for various cell types.
  • Self-assembling protein domains from human muscle sarcomeres (ZT material) are suitable for creating defined ECMs.

Purpose of the Study:

  • To evaluate ZT material modified with the fibronectin 10 domain (ZTFn10) as a replacement for bovine fibronectin in neural crest cell (NCC) toxicity testing.
  • To assess the bioactivity and performance of ZTFn10 in a neural crest cell migration assay (cMINC).

Main Methods:

  • Human NCCs were generated from pluripotent stem cells.
  • The automated NCC migration assay (cMINC) was employed.
  • ZTFn10 and unmodified ZT material were tested as coatings, with bovine fibronectin serving as a positive control.
  • Time-lapse recording analyzed NCC migration.
  • Sensitivity to known cMINC assay inhibitors (PCB180, LiCl, cytochalasin D) was assessed.

Main Results:

  • ZTFn10 coating supported high NCC migration activity, unlike the unmodified ZT material.
  • The bioactivity of ZTFn10 was comparable to traditional bovine fibronectin coatings.
  • Inhibition curves for cMINC assay positive controls were nearly identical on both ZTFn10 and traditional coatings.

Conclusions:

  • ZTFn10 serves as a viable, animal-free alternative to bovine fibronectin for NCC-based toxicity testing.
  • This engineered ECM system demonstrates full bioactivity and can potentially be used in the cMINC assay and other bioassays.
  • The development of modular, recombinant ECMs offers a defined and versatile platform for various cell culture applications.