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result(s) for
"Pont, A Dal"
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The role of Mediterranean diet on the risk of pancreatic cancer
2013
Background:
The Mediterranean diet has been shown to have a beneficial role on various neoplasms, but data are scanty on pancreatic cancer.
Methods:
We analysed data from two case–control studies conducted in Italy between 1983 and 2008, including 362 and 326 pancreatic cancer cases and 1552 and 652 hospital-controls, respectively. A Mediterranean Diet Score (MDS) summarising major characteristics of the Mediterranean diet was used in the two studies separately and overall. Two further scores of adherence to the Mediterranean diet were applied in the second study only, the Mediterranean Dietary Pattern Adherence Index (MDP) and the Mediterranean Adequacy Index (MAI).
Results:
Odds ratios (ORs) for increasing levels of the scores (i.e., increasing adherence) were estimated using multiple logistic regression models. Odds ratio for a MDS score ⩾6 compared with <3 was 0.57 (95% confidence interval (CI) 0.34–0.95) in the first study, 0.51 (95% CI 0.29–0.92) in the second study, and 0.48 (95% CI 0.35–0.67) overall. A trend of decreasing risk was observed also for the MDP and MAI the ORs for the highest
vs
the lowest quintile being 0.44 (95% CI 0.27–0.73) for MDP and 0.68 (95% CI 0.42–1.11) for the MAI. The results were consistent across strata of age, sex, education, body mass index, alcohol drinking, tobacco smoking, and diabetes.
Conclusion:
Our study provides evidence that
a priori
-defined scores measuring adherence to the Mediterranean diet are favourably associated with pancreatic cancer risk.
Journal Article
Complementarity and lean manufacturing bundles: an empirical analysis
by
Dal Pont, Giorgia
,
Furlan, Andrea
,
Vinelli, Andrea
in
Bundles
,
Communication
,
Empirical analysis
2011
Purpose - The paper aims to test and validate the complementarity effects on operational performance of two of the main lean manufacturing bundles, just-in-time (JIT) and total quality management (TQM). The paper also explores the role played by the human resource management (HRM) bundle as an enhancer of the complementarity between JIT and TQM.Design methodology approach - The paper is based on statistical analysis on the high performance manufacturing round III database, a survey that involves 266 plants in nine countries across three different industries (electronics, machinery and transportation components).Findings - The paper proves the existence of complementarity between JIT and TQM and shows the enabling role of HRM on such complementarity.Research limitations implications - The paper provides analytical and empirical argumentations showing that JIT and TQM mutually reinforce each other's marginal returns on operational performance. The study also indicates that only those plants characterized by a significant implementation of HRM practices enjoy the complementarity effects of TQM and JIT on operational performance.Practical implications - The research suggests a pattern of improvements where JIT and TQM have to be implemented hand-in-hand to take full advantage of their complementarity. HRM, the soft part of lean initiatives, provides the ground over which complementarity originates, spreading its benefits throughout the organization.Originality value - The study represents one of the few attempts trying to operationalize and empirically validate the concept of complementarity. The study also provides original suggestions to practitioners on how to make the most out of lean initiatives.
Journal Article
Standard and New Echocardio Techniques, Such as Global Longitudinal Strain, to Monitor the Impact of Diets on Cardiovascular Diseases and Heart Function
by
Romano, Simone
,
Sartorio, Andrea
,
Dal Pont, Chiara
in
Atherosclerosis
,
Blood cholesterol
,
C-reactive protein
2024
“The Seven Countries Study”, published in 1984, was the first study to find a correlation between diet and mortality related to cardiovascular diseases (CVDs). Since then, many investigations have addressed the relationship between type of diet, or specific nutrients, and CVDs. Based on these findings, some traditional dietary models, such as the Mediterranean or Nordic diet, are recommended to prevent CVDs. Meanwhile, new diets have been proposed for optimal nutrition therapy, for example, the Dietary Approaches to Stop Hypertension (DASH) and the Mediterranean–DASH Intervention Diet for Neurodegenerative Delay (MIND). The main outcomes evaluated after implementing these dietary models are as follows: CVD-related death; the development of specific CVDs, such as myocardial infarction and hypertension; or biochemical parameters related to CVDs, i.e., non-HDL cholesterol, C-reactive protein (CPR) and homocysteine. However, the early impact of diet on heart functionality is less evaluated. Recently, the echographic measurement of left ventricle (LV) deformation by global longitudinal strain (GLS) has been introduced as a novel marker of clinical and subclinical cardiac dysfunction. This technology allows a subclinical evaluation of heart functionality since, differently from the traditional evaluation of left ventricle ejection fraction (LVEF), it is capable of detecting early myocardial dysfunction. In this review, we analyzed the available studies that correlate dietetic regimens to cardiovascular diseases, focusing on the relevance of LV strain to detect subclinical myocardial alteration related to diet. Evidence is presented that DASH and MIND can have a positive impact on heart functionality and that myocardial strain is useful for early detection of diet-related changes in cardiac function.
Journal Article
The heat shock protein 47 as a potential biomarker and a therapeutic agent in cancer research
2018
Heat shock protein 47 (HSP47) is an important chaperone required for the correct folding and secretion of collagen. Several studies revealed that HSP47 has a role in numerous steps of collagen synthesis, preventing procollagen aggregation and inducing hydroxylation of proline and lysine residues. HSP47 is encoded by the SERPINH1 gene, which is located on chromosome 11q13.5, one of the most frequently amplified regions in human cancer. The altered expression levels of HSP47 have been correlated with several types of cancer, such as cervical, breast, pancreatic and gastric cancers. Studies have shown that HSP47 promotes tumor angiogenesis, growth, migration and metastatic capacity. In this review, we highlight the fundamental aspects of the interaction between HSP47 and collagen and the recent discoveries of the role of this chaperone in different types of malignant neoplasias. We also discuss recent treatments using HSP47 as a therapeutic target, and present evidences that HSP47 is an essential protein for cancer biology and a potential molecular target for chemotherapy.
Journal Article
Novel Models for Chronic Intestinal Inflammation in Chickens: Intestinal Inflammation Pattern and Biomarkers
2021
For poultry producers, chronic low-grade intestinal inflammation has a negative impact on productivity by impairing nutrient absorption and allocation of nutrients for growth. Understanding the triggers of chronic intestinal inflammation and developing a non-invasive measurement is crucial to managing gut health in poultry. In this study, we developed two novel models of low-grade chronic intestinal inflammation in broiler chickens: a chemical model using dextran sodium sulfate (DSS) and a dietary model using a high non-starch polysaccharide diet (NSP). Further, we evaluated the potential of several proteins as biomarkers of gut inflammation. For these experiments, the chemical induction of inflammation consisted of two 5-day cycles of oral gavage of either 0.25mg DSS/ml or 0.35mg DSS/ml; whereas the NSP diet (30% rice bran) was fed throughout the experiment. At four times (14, 22, 28 and 36-d post-hatch), necropsies were performed to collect intestinal samples for histology, and feces and serum for biomarkers quantification. Neither DSS nor NSP treatments affected feed intake or livability. NSP-fed birds exhibited intestinal inflammation through 14-d, which stabilized by 36-d. On the other hand, the cyclic DSS-treatment produced inflammation throughout the entire experimental period. Histological examination of the intestine revealed that the inflammation induced by both models exhibited similar spatial and temporal patterns with the duodenum and jejunum affected early (at 14-d) whereas the ileum was compromised by 28-d. Calprotectin (CALP) was the only serum protein found to be increased due to inflammation. However, fecal CALP and Lipocalin-2 (LCN-2) concentrations were significantly greater in the induced inflammation groups at 28-d. This experiment demonstrated for the first time, two in vivo models of chronic gut inflammation in chickens, a DSS and a nutritional NSP protocols. Based on these models we observed that intestinal inflammation begins in the upper segments of small intestine and moved to the lower region over time. In the searching for a fecal biomarker for intestinal inflammation, LCN-2 showed promising results. More importantly, calprotectin has a great potential as a novel biomarker for poultry measured both in serum and feces.
Journal Article
Retrospectives: Do Productive Recessions Show the Recuperative Powers of Capitalism? Schumpeter's Analysis of the Cleansing Effect
2017
Schumpeter has often been interpreted as a ”liquidationist,” someone who is convinced that economic crises are necessary and unavoidable, and thus that government noninterventionism is a sound policy in such crises. The first two sections of this paper discuss Schumpeter's views in greater detail and suggest that categorizing him as a “liquidationist” is an oversimplification and as an unrepentant “noninterventionist” is incorrect. Although Schumpeter was certainly not a strong supporter of public interventions, he did see a role for public expenditure programs in particular circumstances. During periods of recession, Schumpeter believed firmly in what he described as the “recuperative powers of capitalism.” However, when a depression becomes “pathological,” there could be a role for government to intervene. In order to understand the overall picture of Schumpeter's message, we will first try to explain Schumpeter's analysis of recessions, depressions, and the other stages of business cycles. We will also discuss how Schumpeter perceived the recuperative powers of capitalism, a core concept in Schumpeter's analysis that allows him to distinguish between physiological and pathological recessions. In the 1990s, an active line of research examined the possibility that recessions may have a productive character along with their more obvious negative outcomes, because recessions in some way might hasten the process of reallocating economic recourses from slower-growth to faster-growth sectors. Such models were sometimes referred to as “neo-Schumpeterian,” but given our analysis of Schumpeter's work, we will question whether this label is appropriate.
Journal Article
Extrusion Parameters Optimization and Mechanical Properties of Bio-Polyamide 11-Based Biocomposites Reinforced with Short Basalt Fibers
by
Aliotta, Laura
,
Gigante, Vito
,
Cartoni, Francesca
in
Basalt
,
Biomedical materials
,
Boundary conditions
2024
The increasing demand for sustainable materials in high-value applications, particularly in the automotive industry, has prompted the development of biocomposites based on renewable or recyclable matrices and natural fibers as reinforcements. In this context, this paper aimed to produce composites with improved mechanical and thermal properties (tensile, flexural, and heat deflection temperature) through an optimized process pathway using a biobased polyamide reinforced with short basalt fibers. This study emphasizes the critical impact of fiber length, matrix adhesion, and the variation in matrix properties with increasing fiber content. These factors influence the properties of short-fiber composites produced via primary processing using extrusion and shaped through injection molding. The aim of this work was to optimize extrusion conditions using a 1D simulation software to minimize excessive fiber fragmentation during the extrusion process. The predictive model’s capacity to forecast fiber degradation and the extent of additional fiber breakage during extrusion was evaluated. Furthermore, the impact of injection molding on these conditions was investigated. Moreover, a comprehensive thermomechanical characterization of the composites, comprising 10%, 20%, and 30% fiber content, was carried out, focusing on the correlation with morphology and processing using SEM and micro-CT analyses. In particular, how the extrusion process parameters adopted can influence fiber breakage and how injection molding can influence the fiber orientation were investigated, highlighting their influence in determining the final mechanical properties of short fiber composites. By optimizing the process parameters, an increment with respect to bio-PA11 in the tensile strength of 38%, stiffness of 140%, and HDT of 77% compared to the matrix were obtained.
Journal Article
Investigation of Novel Flax Fiber/Epoxy Composites with Increased Biobased Content
by
Lazzeri, Andrea
,
Aliotta, Laura
,
Panariello, Luca
in
Biomedical materials
,
Bisphenol A
,
Composite materials
2023
Currently, biobased epoxy resins derived from plant oils and natural fibers are available on the market and are a promising substitute for fossil-based products. The purpose of this work is to investigate novel lightweight thermoset fiber-reinforced composites with extremely high biobased content. Paying attention to the biobased content, following a cascade pathway, many trials were carried out with different types of resins and hardeners to select the best ones. The most promising formulations were then used to produce flax fiber reinforced composites by vacuum bagging process. The main biocomposite properties such as tensile, bending, and impact properties as well as the individuation of their glass transition temperatures (by DSC) were assessed. Three biocomposite systems were investigated with biobased content ranging from 60 to 91%, obtaining an elastic modulus that varied from 2.7 to 6.3 GPa, a flexural strength from 23 to 108.5 MPa, and Charpy impact strength from 11.9 to 12.2 kJ/m2. The properties reached by the new biocomposites are very encouraging; in fact, their stiffness vs. lightweight (calculated by the E/ρ3 ratio) is comparable to some typical epoxy–glass composites.
Journal Article
Expectations in Past and Modern Economic Theory. Foreword
by
Arena, Richard
,
Guesnerie, Roger
,
Dal-Pont Legrand, Muriel
in
Economic theory
,
Economics and Finance
,
Humanities and Social Sciences
2021
This topic is not really new. Every economist or person interested by economic activity knows the crucial direct or indirect importance of the forecasts or views that decision makers hold about future prices, sales, incomes, profitability or other key microeconomic or macroeconomic magnitudes. As many commentators (see, for instance, Leijonhufvud [1986: 4]) mentioned, the central difference between economics and natural sciences precisely lies in the forward-looking predictions and decisions made by economic agents since certainty and determinism do not often prevail in the working of the economic system. Therefore, the analysis of the contents and the impact of expectations on the micro- and the macro-economic variables is complex and often requires sophisticated reflections and tools as well as the use of the contributions of other natural (mathematics, physics) or social (psychology, sociology, philosophy) sciences. This is the reason why expectations provide a basic building block of economic theory. Notably they lie at the core of economic dynamics as they usually determine, not only the behavior of the agents, but also the main properties of the economy related to the evolution of these behavior in time. A central aspect of economic theories is indeed that expectations influence the time path of the economy, and conversely it must be the case that time path influences expectations.
Journal Article
Morphological Assessment and Biomarkers of Low-Grade, Chronic Intestinal Inflammation in Production Animals
by
Dal Pont, Gabriela C.
,
Santin, Elizabeth
,
Kogut, Michael H.
in
Animals
,
Antibiotics
,
Biomarkers
2022
The complex interaction between the intestinal mucosa, the gut microbiota, and the diet balances the host physiological homeostasis and is fundamental for the maximal genetic potential of production animals. However, factors such as chemical and physical characteristics of the diet and/or environmental stressors can continuously affect this balance, potentially inducing a state of chronic low-grade inflammation in the gut, where inflammatory parameters are present and demanding energy, but not in enough intensity to provoke clinical manifestations. It’s vital to expand the understanding of inflammation dynamics and of how they compromise the function activity and microscopic morphology of the intestinal mucosa. These morphometric alterations are associated with the release of structural and functional cellular components into the feces and the blood stream creating measurable biomarkers to track this condition. Moreover, the identification of novel, immunometabolic biomarkers can provide dynamic and predictors of low-grade chronic inflammation, but also provide indicators of successful nutritional or feed additive intervention strategies. The objective of this paper is to review the mechanisms of low-grade inflammation, its effects on animal production and sustainability, and the biomarkers that could provide early diagnosis of this process and support studies of useful interventional strategies.
Journal Article