Immunohistochemical Predictors for Intestinal and Pancreatobiliary Types of Adenocarcinoma of The Ampulla of Vater

Objectives

To investigate immunohistochemical predictors for intestinal and pancreatobiliary types of adenocarcinoma of ampulla of Vater and identify clinicopathological characteristics associated with the histological types and patient survival.

Methods

Immunohistochemical markers included MUC1, MUC2, MUC5AC, CDX2, CK7, and CK20. The data were analyzed by univariate and multivariate methods. The two-step cluster method was used to determine the best immunohistochemical markers to discriminate the intestinal from the pancreatobiliary type.

Results

This study identified 9 (33.3%) intestinal and 21 (66.7%) pancreatobiliary tumors. CK7 and CDX2 achieved the highest value (=?1) as predictor markers, while CK20, MUC1, and MUC2 showed degrees of importance equal to 0.77, 0.71, and 0.68, respectively. MUC5AC did not reach 0.50 of importance. In the univariate analysis, lymph node involvement, staging (TNM), and angiolymphatic and perineural invasions were associated with histological types. The independent clinicopathological variable in the multivariate model to predict the histological type was angiolymphatic invasion (p?=?0.005), OR?=?17 (95% CI 2.33 to 123.83). The final model showed positive nodes (N1) associated with shorter survival (HR?=?9.5; p?=?0.006). Overall survival at 12, 36, and 60 months was 88.5, 67.0, and 47.6%, respectively.

Conclusions

CDX2 and CK7 were the immunohistochemical markers that best discriminated the intestinal from the pancreatobiliary type. Lymph node involvement had a high impact on survival and proved to be more frequent in the pancreatobiliary type.

     

Geographic variations in clinical presentation and outcomes of decompressive surgery in patients with symptomatic degenerative cervical myelopathy: analysis of a prospective,international multicenter cohort study of 757 patients

Background Context

Degenerative cervical myelopathy (DCM) is a progressive degenerative spine disease and the most common cause of spinal cord impairment in adults worldwide. Few studies have reported on regional variations in demographics, clinical presentation, disease causation, and surgical effectiveness.

Changes and predictors of psychological stress among elderly stroke survivors 6 months after hospital discharge

The aim of this study was to analyse the changes in psychological stress and identify its basal predictors among elderly stroke survivors after 6 months following discharge from hospital to home directly, rather than to a rehabilitation facility. The sample comprised 50 elderly stroke survivors. Data were collected at 2 weeks (T1), at 3 months (T2), and at 6 months (T3) after hospital discharge. The following instruments were applied: Perceived Stress Scale—10 items (PSS‐10), National Institute of Health Stroke Scale, Functional Independence Measure, and Geriatric Depression Scale—15 items. Study records indicated that the age of the study participants ranged from 60 to 87 years old (mean = 70.3; standard deviation = 7.6). The number of male and female participants was similar. The PSS‐10 score decreased almost 6 points between T1 (mean = 15.1) and T3 (mean = 9.7; p < .001). Both Functional Independence Measure (p = .025) and Geriatric Depression Scale‐15 (p = .017) scores at T1 predicted the PSS‐10 score at T3. The study thus demonstrated that elderly stroke survivors experienced significant stress after hospital discharge, which tended to improve over the next 6 months. Depression and lower functional independence 2 weeks after discharge were predictors of a greater level of psychological stress at 6 months following discharge.     

Inflammatory biomarkers in infective endocarditis: machine learning to predict mortality

Infective endocarditis (IE) is the cardiac disease with the highest rates of mortality. New biomarkers that are able to identify patients at risk for death are required to improve patient management and outcome. This study aims to investigate if cytokines, chemokines and growth factors measured at IE diagnosis can predict mortality. Patients with definite IE, according to the Duke’s modified criteria, were included. Using high-performance Luminex assay, 27 different cytokines, chemokines and growth factors were analyzed. Machine learning techniques were used for the prediction of death and subsequently creating a decision tree, in which the cytokines, chemokines and growth factors were analyzed together with C-reactive protein (CRP). Sixty-nine patients were included, 41 (59%) male, median age 54 [interquartile range (IQR) = 41–65 years] and median time between onset of the symptoms and diagnosis was 12 days (IQR = 5–30 days). The in-hospital mortality was 26% (n = 18). Proinflammatory cytokines interkeukin (IL)-15 and C-C motif chemokine ligand (CCL4) were found to predict death, adding value to CRP levels. The decision tree predicted correctly the outcome of 91% of the patients at hospital admission. The high-risk group, defined as CRP ≥ 72 mg/dL, IL-15 ≥ 5·6 fg/ml and CCL4 ≥ 6·35 fg/ml had an 88% in-hospital mortality rate, whereas the patients classified as low-risk had a mortality rate of 8% (P = < 0·001). Cytokines IL-15 and CCL4 were predictors of mortality in IE, adding prognostic value beyond that provided by CRP levels. Assessment of cytokines has potential value for clinical risk stratification and monitoring in IE patients.     

Creatine supplementation impairs airway inflammation in an experimental model of asthma involving P2 × 7 receptor

Creatine (Cr) is a substrate for adenosine triphosphate synthesis, and it is the most used dietary supplement among professional and recreative athletes and sportsmen. Creatine supplementation may increase allergic airway response, but the cellular and molecular mechanisms are unknown. We used murine model of OVA‐induced chronic asthma and showed that Cr supplementation increased total proteins, ATP level, lymphocytes, macrophages, and IL‐5 levels in BALF, as well as IL‐5 in the supernatant of re‐stimulated mediastinal lymph nodes. IL‐5 and IL‐13 expression by epithelial cells and by peribronchial leukocytes were increased by Cr. Cr augmented the expression of P2 × 7 receptor by peribronchial leukocytes and by epithelial cells, and increased the accumulation of eosinophils in peribronchial space and of collagen fibers in airway wall. In human cells, while Cr induced a release of ATP, IL‐6, and IL‐8 from BEAS‐2B cells, whole blood cells, such as eosinophils, and CD4⁺ T cells, P2 × 7 receptor inhibitor (A740003) reduced such effects, as denoted by reduced levels of ATP, IL‐6, and IL‐8. Therefore, Cr supplementation worsened asthma pathology due to activation of airway epithelial cells and peribronchial leukocytes, involving purinergic signaling.     

Avian coronavirus isolated from a pigeon sample induced clinical disease,tracheal ciliostasis,and a high humoral response in day-old chicks

The detection of avian coronaviruses (AvCoV) in wild birds and the emergence of new AvCoV have increased in the past few years. In the present study, the pathogenicity of three AvCoV isolates was investigated in day-old chicks. One AvCoV isolated from a pigeon, which clustered with the Massachusetts vaccine serotype, and two AvCoV isolated from chickens, which grouped with a Brazilian genotype lineage, were used. Clinical signs, gross lesions, histopathological changes, ciliary activity, viral RNA detection, and serology were evaluated during 42 days post infection. All AvCoV isolates induced clinical signs, gross lesions in the trachea, moderate histopathological changes in the respiratory tract, and mild changes in other tissues. AvCoV isolated from the pigeon sample caused complete tracheal ciliostasis over a longer time span. Specific viral RNA was detected in all tissues, but the highest RNA loads were detected in the digestive tract (cloacal swabs and ileum). The highest antibody levels were also detected in the group infected with an isolate from the pigeon. These results confirm the pathogenicity of Brazilian variants, which can cause disease and induce gross lesions and histopathological changes in chickens. Our results suggest that non-Galliformes birds can also play a role in the ecology of AvCoV.