Non-canonical Hedgehog signaling mediates profibrotic hematopoiesis-stroma crosstalk in myeloproliferative neoplasms.
Cell Rep
; 43(1): 113608, 2024 01 23.
Article
in En
| MEDLINE
| ID: mdl-38117649
ABSTRACT
The role of hematopoietic Hedgehog signaling in myeloproliferative neoplasms (MPNs) remains incompletely understood despite data suggesting that Hedgehog (Hh) pathway inhibitors have therapeutic activity in patients. We aim to systematically interrogate the role of canonical vs. non-canonical Hh signaling in MPNs. We show that Gli1 protein levels in patient peripheral blood mononuclear cells (PBMCs) mark fibrotic progression and that, in murine MPN models, absence of hematopoietic Gli1, but not Gli2 or Smo, significantly reduces MPN phenotype and fibrosis, indicating that GLI1 in the MPN clone can be activated in a non-canonical fashion. Additionally, we establish that hematopoietic Gli1 has a significant effect on stromal cells, mediated through a druggable MIF-CD74 axis. These data highlight the complex interplay between alterations in the MPN clone and activation of stromal cells and indicate that Gli1 represents a promising therapeutic target in MPNs, particularly that Hh signaling is dispensable for normal hematopoiesis.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Myeloproliferative Disorders
/
Neoplasms
/
Antineoplastic Agents
Limits:
Animals
/
Humans
Language:
En
Journal:
Cell Rep
Year:
2024
Document type:
Article
Affiliation country:
Países Bajos
Country of publication:
Estados Unidos