Simultaneous detection of multiple analytes from a single biological sample is gaining more attention in the development of more reliable and point-of-care diagnostic devices. We developed a multiplexed strategy that combined outcomes of clinical biomarkers with analysis of the protein corona that forms around graphene oxide sheets upon exposure to patient’s plasma. As a paradigmatic case study, we selected pancreatic ductal adenocarcinoma (PDAC), mainly because of the absence of effective detection strategies that resulted in an extremely low five-year survival rate after diagnosis (<10%). Association of protein corona analysis and haemoglobin levels discriminated PDAC patients from healthy volunteers in up to 90% of cases. If further confirmed in larger-cohort studies, this approach may be used in the detection of PDAC.

Background: Bacterobilia is associated with postoperative morbidity after pancreaticoduodenectomy (PD), mostly due to infectious complications. The aim of this study was to investigate the prevalence of bacteria species isolated from intraoperative biliary cultures, and related complications after PD. Methods: An ANOVA test was used to assess the prevalence of isolated bacterial species and postoperative complications. The odds ratio was computed to evaluate the association between biliary cultures and each complication, Endoscopic Retrograde CholangioPancreatography (ERCP) and each complication, ERCP and biliary cultures, Delayed Gastric Emptying (DGE) and Postoperative Pancreatic Fistula (POPF). Results: Positive biliary cultures were found in 162/244 (66%) PDs. Different prevalences of polymicrobial biliary culture were detected in patients with postoperative complications. In SSIs, a significant prevalence of biliary culture positive for E. coli, Klebsiella pneumoniæ and Enterococcus fæcalis (p < 0.001) was detected. Prevalences of polymicrobial biliary cultures with Escherichia coli, Klebsiella pneumoniæ, Enterococcus fæcalis and Enterococcus fæcium were significantly associated with POPF (p < 0.001). Biliary culture positive for Escherichia coli, Enterococcus fæcalis and Enterococcus fæcium showed a higher prevalence of intra-abdominal collection and DGE (p < 0.001). Notably, Escherichia coli was significantly associated with DGE as a unique complication (OR = 2.94 (1.30–6.70); p < 0.01). Conclusions: Specific prevalences of polymicrobial bacterobilia are associated with major complications, while monomicrobial Escherichia coli bacterobilia is associated with DGE as a unique complication after PD.

Postoperative day 1-drains amylase (POD1-DA) values are commonly used to predict the risk of pancreatic fistula (PF) after pancreaticoduodenectomy (PD). Perioperative inflammatory biomarkers have been associated to higher risk of complications in different oncological surgeries. Aim of this study was to investigate the utility of the combination of preoperative inflammatory biomarkers (PIBs) with POD1-DA levels in predicting grade C PF. From a prospective collected database of 317 consecutive pancreaticoduodenectomies, data regarding POD1-DA levels and PIBs as neutrophil-to-lymphocyte ratio (NRL), derived neutrophil-to-lymphocyte ratio (dNRL), platelet-to-lymphocyte ratio (PLR) were analyzed in 227 cases. P-values <0.05 were considered statistically significant. Receiver operating characteristic (ROC) curves defined the optimal thresholds for biomarkers and drains amylase values and their accuracy to predict PF. Furthermore, the Positive Predictive Value (PPV) was computed to evaluate the probability to develop PF combining PIBs and drains amylase values. Combination of drains amylase and different PIBs cut-offs were used to evaluate the risk of grade C PF. A POD1-DA level of 351 U/L significantly predicted PF (sensitivity 82.7%, specificity 76%, AUC 0.836; p < 0.001) with a PPV of 76.5% and a NPV of 82.6%. POD1-DA levels ≥807 U/L significantly predicted grade C PF (sensitivity 72.7%, specificity 64.4%, AUC 0.676; p = 0.004) with a PPV of 17.8% and a NPV of 95.6%. Notably, this last PPV increased from 17.8% to 89% when PIBs, at different cut-offs, were combined with POD1-DA at the value ≥ 807 U/L. PIBs significantly improve POD1-DA ability in predicting grade C PF after PD.

Nanomaterials exposed to human plasma (HP) are immediately covered by a protein corona (PC) whose composition is personalized, ie it depends on interindividual changes of the human proteome as those induced by several human diseases. Latest studies have shown that characterization of the personalized “disease-specific” PC can be successfully exploited for early detection of cancer.

Background: Idiopathic slow-transit constipation (STC) is a clinically significant event of chronic constipation. Total colectomy with ileorectal anastomosis is considered the standard surgical option for medically refractory STC but is associated with relevant morbidity and long-term functional impairment. This study aimed to evaluate safety and functional outcomes of partial colectomy (segmental or subtotal resection) as a potential alternative in patients with limited colonic involvement. Methods: A retrospective observational single-center study was conducted on patients with STC refractory to medical and rehabilitative treatment (1998–2021). Five-year follow-up data were collected. Results: On a cohort of 76 patients, 10 (13.2%) underwent total colectomy, 63 (82.9%) segmental, and 3 (3.9%) subtotal resections (left hemicolectomy). No perioperative mortality occurred. Overall, 30-day morbidity was 25.0%, with major complications observed in 12.1% after partial colectomy. Median hospital stay was three days longer after total colectomy. Constipation recurred in 20.3% of patients, exclusively after segmental resection, at a median follow-up of 7.7 years. Constipation severity significantly decreased postoperatively (p < 0.001), with the mean Wexner score improving from 21.5 to 6.1 (p < 0.001). Rates of diarrhea and fecal incontinence were comparable between segmental and total colectomy. Quality-of-life significantly improved in more than 75% of cases across all SF-36 domains. Conclusions: Segmental colectomy may be a safe and effective alternative to total colectomy in patients with limited STC, potentially offering durable symptom relief and favorable quality-of-life outcomes.