A Multifunctional Nanostructured Hydrogel as a Platform for Deciphering Niche Interactions of Hematopoietic Stem and Progenitor Cells

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Anita Ludwig-Husemann - , Leibniz University Hannover (LUH), Karlsruhe Institute of Technology (Author)
  • Peter Schertl - , Leibniz University Hannover (LUH) (Author)
  • Ananya Shrivastava - , Leibniz University Hannover (LUH) (Author)
  • Udo Geckle - , Karlsruhe Institute of Technology (Author)
  • Johanna Hafner - , Karlsruhe Institute of Technology (Author)
  • Frank Schaarschmidt - , Leibniz University Hannover (LUH) (Author)
  • Norbert Willenbacher - , Karlsruhe Institute of Technology (Author)
  • Uwe Freudenberg - , Leibniz Institute of Polymer Research Dresden (Author)
  • Carsten Werner - , Center for Regenerative Therapies Dresden, Chair of Biofunctional Polymer Materials, Leibniz Institute of Polymer Research Dresden (Author)
  • Cornelia Lee-Thedieck - , Leibniz University Hannover (LUH) (Author)

Abstract

For over half a century, hematopoietic stem cells (HSCs) have been used for transplantation therapy to treat severe hematologic diseases. Successful outcomes depend on collecting sufficient donor HSCs as well as ensuring efficient engraftment. These processes are influenced by dynamic interactions of HSCs with the bone marrow niche, which can be revealed by artificial niche models. Here, a multifunctional nanostructured hydrogel is presented as a 2D platform to investigate how the interdependencies of cytokine binding and nanopatterned adhesive ligands influence the behavior of human hematopoietic stem and progenitor cells (HSPCs). The results indicate that the degree of HSPC polarization and motility, observed when cultured on gels presenting the chemokine SDF-1α and a nanoscale-defined density of a cellular (IDSP) or extracellular matrix (LDV) α4β1 integrin binding motif, are differently influenced on hydrogels functionalized with the different ligand types. Further, SDF-1α promotes cell polarization but not motility. Strikingly, the degree of differentiation correlates negatively with the nanoparticle spacing, which determines ligand density, but only for the cellular-derived IDSP motif. This mechanism potentially offers a means of predictably regulating early HSC fate decisions. Consequently, the innovative multifunctional hydrogel holds promise for deciphering dynamic HSPC-niche interactions and refining transplantation therapy protocols.

Details

Original languageEnglish
JournalAdvanced healthcare materials
Publication statusAccepted/In press - 2024
Peer-reviewedYes

External IDs

PubMed 38870600

Keywords

Keywords

  • block copolymer micelle nanolithography, differentiation, hematopoietic stem cells, integrins, multifunctionality, nanostructures, two dimensional hydrogels