Fig. 1. Reduction of N6AMT1 and DNA 6mA levels correlates with poor prognosis of BC patients.
A, B Levels of the global N6-methyladenine (6mA) in DNA were assessed via ELISA in primary breast cancer tissues (BC), normal breast tissues (BN), and adjacent non-breast cancerous tissues (NBC). Unpaired and paired t-tests were performed in (A) and (B), respectively. C Statistical analysis (Student’s t-test) of N6AMT1 and ALKBH1 protein between BC (n = 96) and NC (n = 14). D IHC staining for N6AMT1 in BC and BN samples. E Correlation between N6AMT1 protein and DNA 6mA levels in BC tissue was analyzed by Spearman’s t-test. F Kaplan–Meier survival curves of the disease-free survival (DFS) based on N6AMT1 expression level. G Box plots showing N6AMT1 mRNA expression from the ONCOMINE database analysis of breast statistics. *P < 0.05 vs. normal breast tissues. H, I Prognostic value of N6AMT1 mRNA levels in BC patients from the studies of Tumor Breast (MDC) Bertucci and (Taxane–Anthracycline) Booser. Statistical analysis was done using the log-rank test.