N 6 -methyladenosine (m 6 A) has an important epitranscriptomic modification that controls cancer self-renewal and cell fate. The addition of m 6 A to mRNA is a reversible modification. The deposition of m 6 A is encoded by a methyltransferase complex involving three homologous factors, jargonized as "writers," "erasers," and "readers." However, their roles in pancreatic adenocarcinoma (PAAD) are underexploited. With the use of The Cancer Genome Atlas (TCGA) and International Cancer Genome Consortium (ICGC) databases, we provided an mRNA signature that may improve the prognostic prediction of PAAD patients based on the genetic status of m 6 A regulators. PAAD patients with genetic alteration of m 6 A regulators had worse disease-free and overall survival. After comparing PAAD groups with/without genetic alteration of m 6 A regulators, we identified 196 differentially expressed genes (DEGs). Then, we generated a 16-mRNA signature score system through least absolute shrinkage and selection operator (LASSO) Cox regression analysis. Multivariate cox regression analysis demonstrated that a high-risk score significantly correlates with poor prognosis. Moreover, time-dependent receiver operating characteristic (ROC) curves revealed it was effective in predicting the overall survival in both training and validation sets. PAH, ZPLD1, PPFIA3, and TNNT1 from our signature also exhibited an independent prognostic value. Collectively, these findings can improve the understanding of m 6 A modifications in PAAD and potentially guide therapies in PAAD patients.

BackgroundTo evaluate the predictive value of serum albumin (ALB) for persistent organ failure (POF) in acute pancreatitis (AP).MethodsWe selected 158 patients with AP in this retrospective study from Jan.1st, 2015 to Dec.31st, 2015. Forty-six patients were diagnosed with POF. All the values of laboratory parameters were measured upon admission to hospital. And 48 h after admission, we examined serum albumin of each patient again, called ‘ALB2’. Uni-and multi-variate logistic regression were used to evaluate the impact of ALB to predict POF.ResultsThe median age of the whole population was 48 years and 53.8% were male. The admission-time albumin of AP patients with POF was distinctly lower than patients without POF (28.9 (25.3–33.1) g/L vs. 38.5 (34.0–40.1) g/L, p < 0.001). In uni-variate analysis, WBC, PT, GLU, LDH, ALB, ALB2, BUN, Ca, HDL-C and Ranson were significantly associated with POF. After multivariate regression, ALB remained an independent prognostic factor for POF in AP (OR: 0.748, 95%CI: 0.645–0.868; p < 0.05). The AUC for ALB is 0.873 (0.808, 0.938), even larger than that for Ranson, 0.845 (0.634, 0.913).ConclusionsWe identified serum albumin predictive to persistent organ failure in acute pancreatitis.