Molecular targets of glucocorticoids that elucidate their therapeutic efficacy in aggressive lymphomas.
Cancer Cell
; 42(5): 833-849.e12, 2024 May 13.
Article
in En
| MEDLINE
| ID: mdl-38701792
ABSTRACT
Glucocorticoids have been used for decades to treat lymphomas without an established mechanism of action. Using functional genomic, proteomic, and chemical screens, we discover that glucocorticoids inhibit oncogenic signaling by the B cell receptor (BCR), a recurrent feature of aggressive B cell malignancies, including diffuse large B cell lymphoma and Burkitt lymphoma. Glucocorticoids induce the glucocorticoid receptor (GR) to directly transactivate genes encoding negative regulators of BCR stability (LAPTM5; KLHL14) and the PI3 kinase pathway (INPP5D; DDIT4). GR directly represses transcription of CSK, a kinase that limits the activity of BCR-proximal Src-family kinases. CSK inhibition attenuates the constitutive BCR signaling of lymphomas by hyperactivating Src-family kinases, triggering their ubiquitination and degradation. With the knowledge that glucocorticoids disable oncogenic BCR signaling, they can now be deployed rationally to treat BCR-dependent aggressive lymphomas and used to construct mechanistically sound combination regimens with inhibitors of BTK, PI3 kinase, BCL2, and CSK.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Receptors, Antigen, B-Cell
/
Glucocorticoids
Limits:
Animals
/
Humans
Language:
En
Journal:
Cancer Cell
Journal subject:
NEOPLASIAS
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: