Patients received neoadjuvant concurrent gemcitabine and radiation therapy with or without gemcitabine-cisplatin induction therapy. They found that none of the 17 SNPs, individually, had a significant association with OS. A combined genotype effect on OS was observed. Patients carrying 0 to 1 (n = 43), 2 to 3 (n = 77), or 4 to 6 (n = 30) variant alleles had median survival time of 31.5, 21.4, and 17.5 months,

Inhibitors,research,lifescience,medical respectively. The hazard ratio of dying was 1.71 (95% confidence interval, 1.06-2.76) and 3.16 (95% confidence interval, 1.77-5.63) for patients carrying two to three Inhibitors,research,lifescience,medical or four to six at-risk genotypes (P = 0.028 and P < 0.001), respectively, after adjusting for clinical predictors. Four SNPs mainly, CDA C111T, dCK C-1205T,

dCK A9846G, and hCNT3 A25G had a significant association with neutropenia toxicity (individually and combined). The authors concluded that these observations suggest that polymorphic variations of drug metabolic genes may be associated with toxicity of gemcitabine-based therapy and OS of patients Inhibitors,research,lifescience,medical with resectable pancreatic cancer. Rapid autopsy based DPC4 data Recent rapid autopsy data presented by Dr. Iacobuzio-Donahue Inhibitors,research,lifescience,medical and colleagues suggest that pancreatic cancers can present with distinct Olaparib in vitro genetic subtypes with different patterns of failure (31). In their study, patients with DPC4 intact tumors were more likely to die of locally destructive disease (30% of patients) and those with DPC4 mutated tumors with a distant Inhibitors,research,lifescience,medical widespread metastatic disease (70%). These distinct patterns of failure (locally destructive versus metastatic) were unrelated to clinical stage at presentation, treatment history, and histopathologic features. There is significant

interest in understanding if this data holds true in patients being treated (prospectively) and eventually use this information mafosfamide to guide therapy based on sub-groups of patients (locally destructive or wildly metastatic phenotypes). The feasibility of determining DPC4 status on diagnostic cytology specimens was tested recently in patients with locally advanced pancreatic cancer using immunohistochemical staining though patient numbers were small and additional validation studies are warranted (32). Summary Preoperative management of pancreatic cancer is an important and evolving field especially with the enlarging definition of borderline resectability.