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World Journal of Gastroenterology 2012年第29期18卷 3782-3786页

作者： Luca Valenti Paola Dongiovanni silvia Fargion Università degli Studi di Milano Fondazione Ca' Granda IRCCS Ospedale Maggiore Policlinico20122 MilanoItaly

Nonalcoholic fatty liver disease(NAFLD),defined by excessive liver fat deposition related to the metabolic syndrome,is a leading cause of progressive liver disease,for which accurate non-invasive staging systems and effective treatments are still *** has shown that increased ferritin levels are associated with the metabolic insulin resistance syndrome,and higher hepatic iron and fat *** and iron stores have been associated with the severity of liver damage in NAFLD,and iron depletion reduced insulin resistance and liver ***,Kowdley et al demonstrated in a multicenter study in 628 adult patients with NAFLD from the NAFLD-clinical research network database with central re-evaluation of liver histology and iron staining that the increased serum ferritin level is an independent predictor of liver damage in patients with NAFLD,and is useful to identify NAFLD patients at risk of non-alcoholic steatohepatitis and advanced *** data indicate that incorporation of serum ferritin level may improve the performance of noninvasive scoring of liver damage in patients with NAFLD,and that iron depletion still represents an attractive therapeutic target to prevent the progression of liver damage in these patients.

关键词： Fibrosis Ferritin Iron overload Nonalcoholic fatty liver disease Steatohepatitis Steatosis

Oligo-carrageenan kappa increases C, N and S assimilation, auxin and gibberellin contents, and growth in Pinus radiata trees

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Journal of Forestry Research 2015年第3期26卷 635-640页

作者： silvia Saucedo Rodrigo A. Contreras Alejandra Moenne University of Santiago of Chile Santiago Chile Facultad de Ciencias Agrarias Universidad Te'cnica Estatal de Quevedo 63 Quevedo Ecuador

Oligo-carrageenans （OCs） obtained from pure carrageenans extracted from marine red algae stimulate growth by enhancing photosynthesis and basal metabolism in tobacco plants and Eucalyptus trees. In addition, OCs stimulate secondary metabolism, increasing the level of metabolites involved in defense against pathogens. In this work, we analyzed the effect of OC kappa on the increase in height, in activities of basal metabolism enzymes in- volved in carbon, nitrogen and sulphur assimilation, ribu- lose 1,5 biphosphate carboxylase/oxygenase （rubisco）, glutamate dehydrogenase （GDH） and O-acetylserine thiol- lyase （OASTL）, and in the level of growth-promoting hormones, the auxin indole acetic acid （IAA） and the gibberellin GA3, in pine （Pinus radiata） trees treated with OC kappa at concentrations of 1 and 5 mg mL-1 and cultivated for 9 months without additional treatment. Pines treated with OC kappa at 1 mg mL-1 showed a similar increase in height but displayed a higher increased in total chlorophyll, activities of rubisco, GDH and OASTL and level of IAA and GA3 than those treated with OC kappa at 5 mg mL-1. Thus, OC kappa stimulates growth and basal metabolism and increases the level of growth-promoting hormones in pine trees, mainly at 1 mg mL-1.

关键词： Auxin Basal metabolism C, N and Sassimilation Gibberellin Oligo-carrageenan kappaPinus radiata

Parathyroid hormone pulsatility: physiological and clinical aspects

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Bone Research 2015年第1期3卷 1-5页

作者： silvia Chiavistelli Andrea Giustina Gherardo Mazziotti University of Brescia

Parathyroid hormone （PTH） secretion is characterized by an ultradian rhythm with tonic and pulsatile components. In healthy subjects, the majority of PTH is secreted in tonic fashion, whereas approximately 30% is secreted in low-amplitude and high-frequency bursts occurring every 10-20 min, superimposed on tonic secretion. Changes in the ultradian PTH secretion were shown to occur in patients with primary and secondary osteoporosis, with skeletal effects depending on the reciprocal modifications of pulsatile and tonic components. Indeed, pathophysiology of spontaneous PTH secretion remains an area potentially suitable to be explored, particularly in those conditions such as secondary forms of osteoporosis, in which conventional biochemical and densitometric parameters may not always give reliable diagnostic and therapeutic indications. This review will highlight the literature data supporting the hypothesis that changes of ultradian PTH secretion may be correlated with skeletal fragility in primary and secondary osteoporosis.

关键词： PTH Parathyroid hormone pulsatility physiological and clinical aspects

The mirror’s curse: Weight perceptions mediate the link between physical activity and life satisfaction among 727,865 teens in 44 countries

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Journal of Sport and Health Science 2021年第1期10卷 48-54,I0001页

作者： silvia Meyer Rebekka Weidmann Alexander Grob Department of Psychology University of BaselMissionsstrasse 62Basel 4055Switzerland

Purpose:The present study aimed to examine the link between physical activity(PA)and life satisfaction in a large international study of *** also aimed to test whether overweight and underweight perceptions act as mediators and whether age and sex acted as ***:For this purpose,we analyzed data from the Health Behavior in School-aged Children study,which comprises 727,865 observations from 44 nations at 4 measurement ***:Multilevel analyses revealed a positive link between PA and life *** addition,underweight and overweight perceptions mediated the effect of PA on life *** further found that age and sex acted as *** older adolescents,stronger effects were found in the links between PA and life satisfaction,PA and overweight perception,and both weight perceptions and life *** addition,in female adolescents,the link between overweight perception and life satisfaction was ***,the links between PA and both weight perceptions were stronger for ***:The results suggest that weight perception explains part of the relationship between PA and life satisfaction in adolescents and that these effects vary as a function of age and sex.

关键词： Adolescent health Life satisfaction Multinational evidence Physical activity Weight perceptions

Genes for RNA-binding proteins involved in neuralspecific functions and diseases are downregulated in Rubinstein-Taybi iNeurons

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Neural Regeneration Research 2022年第1期17卷 5-14页

作者： Lidia Larizza Luciano Calzari Valentina Alari silvia Russo Cytogenetics and Molecular Genetics Laboratory IRCCS Istituto Auxologico ItalianoMilanoItaly

Taking advantage of the fast-growing knowledge of RNA-binding proteins(RBPs)we review the signature of downregulated genes for RBPs in the transcriptome of induced pluripotent stem cell neurons(iNeurons)modelling the neurodevelopmental Rubinstein Taybi Syndrome(RSTS)caused by mutations in the genes encoding CBP/p300 *** discuss top and functionally connected downregulated genes sorted to“RNA processing”and“Ribonucleoprotein complex biogenesis”Gene Ontology *** first set of downregulated RBPs includes members of hnRNHP(A1,A2B1,D,G,H2-H1,MAGOHB,PAPBC),core subunits of U small nuclear ribonucleoproteins and Serine-Arginine splicing regulators families,acting in precursor messenger RNA alternative splicing and *** with literature findings on reduced transcript levels of serine/arginine repetitive matrix 4(SRRM4)protein,the main regulator of the neural-specific microexons splicing program upon depletion of Ep300 and Crebbp in mouse neurons,RSTS iNeurons show downregulated genes for proteins impacting this *** link downregulated genes to neurological disorders including the new HNRNPH1-related intellectual disability syndrome with clinical overlap to *** set of downregulated genes for Ribosome biogenesis includes several components of ribosomal subunits and nucleolar proteins,such NOP58 and fibrillarin that form complexes with snoRNAs with a central role in guiding post-transcriptional modifications needed for rRNA *** nucleolar proteins are“dual”players as fibrillarin is also required for epigenetic regulation of ribosomal genes and conversely NOP58-associated snoRNA levels are under the control of NOP58 interactor BMAL1,a transcriptional regulator of the circadian *** downregulated genes for“dual specificity”RBPs such as RUVBL1 and METTL1 highlight the links between chromatin and the RBP-ome and the contribution of perturbations in their cross-talk to *** underline the hub position o

关键词： alternative splicing CBP/p300 chromatin regulators downregulated genes induced pluripotent stem cell-neurons neurodevelopmental disorders ribosome biogenesis RNA-binding proteins RNASeq Rubinstein-Taybi

Synthesis of Water-soluble, Polyester-based Dendrimer Prodrugs for Exploiting Therapeutic Properties of Two Triterpenoid Acids

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Chinese Journal of Polymer Science 2018年第9期36卷 999-999,1000-1010页

作者： Silvana Alfei Gaby Brice Taptue silvia Catena Angela Bisio Dipartimento di Farmacia Sezione di Chimica e Tecnologie Farmaceutiche e Alimentari Università di Genova

Dendrimers are macromolecules characterized by high controlled size, shape and architecture, presence of inner cavities able to accommodate small molecules and many peripheral functional groups to bind target entities. They are of eminent interest for biomedical applications, including gene transfection, tissue engineering, imaging, and drug delivery. The well-known pharmacological activities of ursolic and oleanolic acids are limited by their small water solubility, non-specific cell distribution, low bioavailability, poor pharmacokinetics, and their direct administration could result in the release of thrombi. To overcome such problems, in this paper we described their physical incorporation inside amino acids-modified polyester-based dendrimers which made them highly water-soluble. IR, NMR, zeta potential, mean size of particles, buffer capacity and drug release profiles of prepared materials were reported. The achieved water-soluble complexes harmonize a polycationic character and a buffer capacity which presuppose efficient cell penetration and increased residence time with a biodegradable cell respectful scaffold, thus appearing as a promising team of not toxic prodrugs for safe administration of ursolic and oleanolic acids.

关键词： Polyester-based amino acids-modified dendrimers Physical encapsulation Water-soluble dendriplexes Buffer capacity NMR investigations

Bone health in diabetes and prediabetes

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World Journal of Diabetes 2019年第8期10卷 421-445页

作者： silvia Costantini Caterina Conte Department of Immunology Transplantation and Infectious DiseasesVita-Salute San Raffaele UniversityMilan 20123Italy Epatocentro Ticino Lugano 6900Switzerland IRCCS Ospedale San Raffaele Internal Medicine and TransplantationMilan 20123Italy

Bone fragility has been recognized as a complication of diabetes,both type 1 diabetes (T1D) and type 2 diabetes (T2D),whereas the relationship between prediabetes and fracture risk is less *** can deeply impact a diabetic patient’s quality of ***,the mechanisms underlying bone fragility in diabetes are complex and have not been fully *** with T1D generally exhibit low bone mineral density (BMD),although the relatively small reduction in BMD does not entirely explain the increase in fracture *** the contrary,patients with T2D or prediabetes have normal or even higher BMD as compared with healthy *** observations suggest that factors other than bone mass may influence fracture *** of these factors have been identified,including disease duration,poor glycemic control,presence of diabetes complications,and certain antidiabetic ***,currently available tools for the prediction of risk inadequately capture diabetic patients at increased risk of *** of this review is to provide a comprehensive overview of bone health and the mechanisms responsible for increased susceptibility to fracture across the spectrum of glycemic status,spanning from insulin resistance to overt forms of *** management of bone fragility in diabetic patient is also discussed.

关键词： Bone Fractures Type 1 diabetes Type 2 diabetes Prediabetes Diabetes complications Bone density Hypoglycemic agents

Coupling between fluids and rock deformation in the continental crust:Preface

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Geoscience Frontiers 2019年第6期10卷 2085-2092页

作者： silvia Japas Sebastian Oriolo Vinod Samuel Instituto de Geociencias Básicas Aplicadas y Ambientales(IGeBA)CONICETUniversidad de Buenos AiresCiudad UniversitariaBuenos AiresArgentina Department of Earth System Sciences Yonsei UniversitySeoulRepublic of Korea

*** Fluids are essential and widespread components of the Earth *** regulate the main process of mass and energy transport,conditioning the geochemical and geophysical evolution of the crust(Bredehoeft and Norton.1990)and,consequently,its properties and mechanical *** coupling between fluids,rock deformation,and heat are crucial engines for plate tectonics,playing a leading role in the rheology and evolution of the lithosphere(*** et al.,2000;Kennedy and van Soest,2007;Thompson,2010;Miller.2013;Yardley and Bodnar,2014:Hirauchi et al.,2016:Menzies et al.,2016;Plümper et al.,2017;Vizán et al.,2017).

关键词： rock crust continental

EQUIVALENT UNIFORM DOSE SENSITIVITY TO CHANGES IN ABSORBED DOSE DISTRIBUTION

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International Journal of Biomathematics 2013年第1期6卷 129-142页

作者： FRANCISCO CUTANDA-HENRIQUEZ silvia VARGAS-CASTRILLON Hospital General Universitario Gregorio Mara~Sn Calle Doctor Esquerdo 46 28007 Madrid Spain Universidad Politdcnica de Madrid Ciudad Universitaria s/n 28040 Madrid Spain

Treatment planning in external beam radiation therapy （EBRT） utilizes dose volume histograms （DVHs） as optimization and evaluation tools. They present the fraction of planning target volume （PTV） receiving more than a given absorbed dose, against the absorbed dose values, and a number of radiobiological indices can be computed with their help. Equivalent uniform dose （EUD） is the absorbed dose that, uniformly imparted, would yield the same biological effect on a tumor as the dose distribution described by the DVH. Uncertainty and missing information can affect the dose distribution, therefore DVHs can be modeled as samples from a set of possible outcomes. This work studies the sensitivity of the EUD index when a small change in absorbed dose distribution takes place. EUD is treated as a functional on the set of DVHs. Defining a Levy distance on this set and using a suitable expansion of the functional, a very simple expression for a bound on the variation of EUD when the dose distribution changes is found. This bound is easily interpreted in terms of standard treatment planning practice.

关键词： Equivalent uniform dose DVH von Mises differential.

Alcohol and hepatocellular carcinoma:A review and a point of view

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World Journal of Gastroenterology 2014年第43期20卷 15943-15954页

作者： Gianni Testino silvia Leone Paolo Borro Centro Alcologico Regionale-Regione Liguria Alcoholic UnitDepartment of General Internal and Specialist MedicineIRCCS AOU San Martino-National Institute for Cancer Research-IST Department of Internal Medicine Clinical Pharmacology and Toxicology UnitUniversity of Genoa

It is well recognized that one cause of chronic liver disease and hepatocellular carcinoma(HCC)is alcohol *** in Italy and the United States concludes that the most common cause of HCC(responsible for 32%to 45%of HCC)is *** has recently been shown that a significant relationship between alcohol intake,metabolic changes,and hepatitis virus infection does *** may be a factor in the development of HCC via direct(genotoxic)and indirect mechanisms(cirrhosis).There is only one way of diagnosing HCC,which is early identification through surveillance,when curative treatments become *** stopping alcohol intake the risk of liver cancer decreases by 6%to 7%a year,and an estimated time period of 23 years is also ***,surveillance is also important in former drinkers and,in our opinion,independently from the presence of compensated *** cases of very early stage(VES)and early stage with portal hypertension,liver transplantation is the optimal option;and in cases of associated disease,percutaneous ethanol injections,radiofrequency and microwave ablation are the ideal *** the possibility of detecting microvascular invasion with HR,several studies and some randomized controlled trials revealed that overall survival and DSF rates in patients with VES HCC are much the same after ablation and ***,ablation can be regarded as a firstline choice for patients with VES *** is important to emphasize that the choice of treatment should be weighed carefully in the context of a multidisciplinary cancer team.

关键词： Alcohol Alcoholic liver disease Hepatocellular carcinoma Percutaneous ablation