Frontiers in Immunology (Oct 2022)

Perturbations of mesenchymal stromal cells after allogeneic hematopoietic cell transplantation predispose for bone marrow graft-versus-host-disease

  • Thomas Krüger,
  • Thomas Krüger,
  • Rebekka Wehner,
  • Rebekka Wehner,
  • Rebekka Wehner,
  • Maik Herbig,
  • Maik Herbig,
  • Maik Herbig,
  • Martin Kräter,
  • Martin Kräter,
  • Michael Kramer,
  • Jan Moritz Middeke,
  • Friedrich Stölzel,
  • Catrin List,
  • Katharina Egger-Heidrich,
  • Raphael Teipel,
  • Uta Oelschlägel,
  • Martin Wermke,
  • Martin Wermke,
  • Helena Jambor,
  • Manja Wobus,
  • Johannes Schetelig,
  • Korinna Jöhrens,
  • Torsten Tonn,
  • Torsten Tonn,
  • Julien Subburayalu,
  • Julien Subburayalu,
  • Julien Subburayalu,
  • Julien Subburayalu,
  • Marc Schmitz,
  • Marc Schmitz,
  • Marc Schmitz,
  • Marc Schmitz,
  • Martin Bornhauser,
  • Martin Bornhauser,
  • Martin Bornhauser,
  • Martin Bornhauser,
  • Malte von Bonin,
  • Malte von Bonin

DOI
https://doi.org/10.3389/fimmu.2022.1005554
Journal volume & issue
Vol. 13

Abstract

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Functional impairment of the bone marrow (BM) niche has been suggested as a major reason for prolonged cytopenia and secondary graft failure after allogeneic hematopoietic cell transplantation (alloHCT). Because mesenchymal stromal cells (MSCs) serve as multipotent progenitors for several niche components in the BM, they might play a key role in this process. We used collagenase digested trephine biopsies to directly quantify MSCs in 73 patients before (n = 18) and/or after alloHCT (n = 65). For the first time, we demonstrate that acute graft-versus-host disease (aGvHD, n = 39) is associated with a significant decrease in MSC numbers. MSC reduction can be observed even before the clinical onset of aGvHD (n = 10). Assessing MSCs instantly after biopsy collection revealed phenotypic and functional differences depending on the occurrence of aGvHD. These differences vanished during ex vivo expansion. The MSC endotypes observed revealed an enhanced population of donor-derived classical dendritic cells type 1 and alloreactive T cells as the causing agent for compartmental inflammation and MSC damage before clinical onset of aGvHD was ascertained. In conclusion, MSCs endotypes may constitute a predisposing conductor of alloreactivity after alloHCT preceding the clinical diagnosis of aGvHD.

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