Reducing FASN expression sensitizes acute myeloid leukemia cells to differentiation therapy.
Magali HumbertKristina SeilerSeverin MosimannVreni RentschKatyayani SharmaAmit V PandeySharon L McKennaMario P TschanPublished in: Cell death and differentiation (2021)
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.
Keyphrases
- induced apoptosis
- acute myeloid leukemia
- cell cycle arrest
- poor prognosis
- transcription factor
- endoplasmic reticulum stress
- cell death
- signaling pathway
- oxidative stress
- intensive care unit
- electronic health record
- stem cells
- cell proliferation
- big data
- dna methylation
- allogeneic hematopoietic stem cell transplantation
- mesenchymal stem cells
- machine learning
- artificial intelligence
- smoking cessation
- mechanical ventilation