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Reducing FASN expression sensitizes acute myeloid leukemia cells to differentiation therapy

Authors :
Magali Humbert
Katyayani Sharma
Vreni Rentsch
Mario P. Tschan
Kristina Seiler
Sharon L. McKenna
Amit V. Pandey
Severin Mosimann
Source :
Cell Death and Differentiation, Humbert, Magali; Seiler, Kristina; Mosimann, Severin; Rentsch, Vreni; Sharma, Katyayani; Pandey, Amit Vikram; McKenna, Sharon L.; Tschan, Mario P. (2021). Reducing FASN expression sensitizes acute myeloid leukemia cells to differentiation therapy. Cell death and differentiation, 28(8), pp. 2465-2481. Springer Nature 10.1038/s41418-021-00768-1
Publication Year :
2021
Publisher :
Springer Science and Business Media LLC, 2021.

Abstract

Fatty acid synthase (FASN) is the only human lipogenic enzyme available for de novo fatty acid synthesis and is often highly expressed in cancer cells. We found that FASN mRNA levels were significantly higher in acute myeloid leukemia (AML) patients than in healthy granulocytes or CD34+ hematopoietic progenitors. Accordingly, FASN levels decreased during all-trans retinoic acid (ATRA)-mediated granulocytic differentiation of acute promyelocytic leukemia (APL) cells, partially via autophagic degradation. Furthermore, our data suggest that inhibition of FASN expression levels using RNAi or (-)-epigallocatechin-3-gallate (EGCG) accelerated the differentiation of APL cell lines and significantly re-sensitized ATRA refractory non-APL AML cells. FASN reduction promoted translocation of transcription factor EB (TFEB) to the nucleus, paralleled by activation of CLEAR network genes and lysosomal biogenesis. Together, our data demonstrate that inhibition of FASN expression in combination with ATRA treatment facilitates granulocytic differentiation of APL cells and may extend differentiation therapy to non-APL AML cells.

Details

ISSN :
14765403 and 13509047
Volume :
28
Database :
OpenAIRE
Journal :
Cell Death & Differentiation
Accession number :
edsair.doi.dedup.....0ff3bac66d67eebf719cac72f98bb636
Full Text :
https://doi.org/10.1038/s41418-021-00768-1