5-Aza-4'-thio-2'-deoxycytidine (ATC) is an azanucleoside cytidine analog under investigation in preclinical studies for solid tumors as a promising DNA methyltransferase 1 (DNMT1) inhibitor...Bisulfite sequencing and treatment with a noncovalent DNMT1 inhibitor indicated that methylated cytosines were preferred targets for mutagenesis. This study reveals that ATC exposure leads to both DNMT1-dependent and -independent mutagenesis and provides a direct link between ATC exposure, a complex mutational signature, and malignant transformation.
Methionine restriction and olaparib showed synergistic efficacy on the BRCA1-mutant TNBC cell line HCC1937. The BRCA1-mutant cell line MDA-MB-436 was most sensitive to rMETase. The BRCA1/2 wild-type TNBC cell line MDA-MB-231 was sensitive to a methionine-free medium but resistant to olaparib. Therefore, methionine restriction has clinical potential for BRCA1/2 wild-type and BRCA1-mutant olaparib-resistant and -sensitive TNBC.
This classifier outperformed a previously developed gene signature in a second MDS patient cohort, but signatures of hematological responses were unable to predict survival. Overall, these studies characterize the molecular consequences of AZA treatment in MDS HSPCs and identify a potential tool for predicting AZA therapy responses and overall survival prior to initiation of therapy.
Differentiation of ADSCs was induced by using 3 μg/mL 5-azacytidine for 24 hours...Coculturing PC12 cells and ADSCs improves the efficiency of myogenic differentiation. However, the effectiveness of myogenic differentiation depends on the proportions of administered PC12 cells.
The SLC22A17 methDNA hotspot could represent a promising biomarker for CM, highlighting the regulatory role of methDNA on SLC22A17 expression. These results pave the way for the identification of novel epigenetic biomarkers and therapeutic targets for the management of CM patients.