Samenvatting

Background & Aims: The progression of chronic liver disease (CLD) is characterized by excessive extracellular matrix deposition,
disrupting hepatic architecture and function. Upon liver injury, hepatic stellate cells (HSCs) differentiate towards myofibroblasts
and become inflammatory, proliferative and fibrogenic. To date, it is still unclear whether HSC activation is driven by similar
mechanisms in different aetiologies.
Methods: HSCs from multiple publicly available single-cell RNA-sequencing datasets were annotated and merged into a singlecell HSC activation atlas. Spheroid co-cultures of primary mouse hepatocytes/HSCs (n = 5) and ELISAs on patient plasma
samples (n = 80) were performed to validate the mechanistic insight obtained from the HSC atlas.
Results: We established an HSC activation atlas in which HSCs are clearly divided into three distinct transcriptomic profiles:
quiescent HSCs, initiatory HSCs and myofibroblasts. These transcriptomic profiles are present in each of the investigated mouse
liver injury models as well as in human CLDs, indicating that HSC activation is a conserved process. This activation process is
driven by a core set of transcription factors independent of liver injury or species. Furthermore, we reveal novel ligands associated
with activation of HSCs in multiple liver injury models and validate the profibrotic effect of parathyroid hormone. Finally, we identify
COLEC10 as a conserved marker for quiescent HSCs and a biomarker of liver fibrosis in patients with different CLDs (p <0.0001).
Conclusions: We reveal unexpected similarities in the regulatory mechanisms of HSCs across diverse liver injury settings and
species. The HSC activation atlas has the potential to provide novel insights into liver fibrosis and steer novel treatment options.
© 2024 The Author(s). Published by Elsevier B.V. on behalf of European Association for the Study of the Liver (EASL). This is an open access article
under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/
Originele taal-2English
Artikelnummer101223
Pagina's (van-tot)1-12
Aantal pagina's12
TijdschriftJHEP reports
Volume7
Nummer van het tijdschrift1
DOI's
StatusPublished - jan 2025

Bibliografische nota

Publisher Copyright:
© 2024 The Author(s)

Keywords

  • Chronic liver disease
  • Single-cell RNA-sequencing
  • parathyroid hormone
  • COLEC10

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