检索结果-南通市图书馆

Novel Engineered Human Fluorescent Osteoblasts for Scaffolds Bioassays

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Biomaterials and Nanobiotechnology 2010年第1期1卷 1-6页

作者： Katia Campioni cristina morelli Antonio D. Agostino Lorenzo Trevisiol Pier Francesco Nocini Marco Manfrini Mauro Tognon Department of Odontostomatology and Maxillo-Facial Surgery School of Medicine and School of Dentistry University of Verona Verona Italy Section of Cell Biology and Molecular Genetics School of Medicine and Centre of Biotechnology University of Ferrara Ferrara Italy

Many cellular models have been used to investigate bone substitutes including coralderived hydroxylapatite (HA). The aim of this study was to verify whether a new cellular model represented by Saos-eGFP cells can be used to test biomaterials by in vitro assays. SaoseGFP cells which express the enhanced Green Fluorescent Protein (eGFP), were derived from the osteoblast-like cell line Saos-2. To this purpose Saos-eGFP cells were employed to investigate the in-vitro bioactivity of a well characterized coral-derived HA biomaterial, in block and granule forms. This engineered cell line, by evaluating the emitted fluorescence, allowed us to assay (i) cell adhesion, (ii) cell proliferation and (iii) colony capability. Electron microscopy analysis was employed to evaluate the (iv) morphology of cells seeded on the biomaterial surface. (v) Histological analysis of the bone grown after scaffold implantation was carried out in specimens from two clinical cases. Saos-eGFP cells indicate, as established before, that the coralline-HA biomaterials has a good in vitro cytocompatibility when tested with human osteoblast-like cells. Some differences in proliferation activity was detected for the two different forms assayed. Cytocompatibility data from in vitro analyses were confirmed by in vivo behaviour of biomaterials. Our tests suggest that the engineered cell line Saos-eGFP represents a suitable in vitro mode for studying the biocompatibility, the cell adhesion, spreading and proliferation on biomaterials developed for clinical applications. The main advantages of this cellular model are (i) less time consuming and (ii) a reduced cost of the experiments.

关键词： Fluorescence Osteoblast Biomaterial

Topical ocular administration of DPP-Ⅳ inhibitors:a new approach for treating diabetes-induced retinal neurodegeneration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第4期19卷 713-714页

作者： Rafael Simó cristina Hernández Diabetes and Metabolism Research Unit Vall d’Hebron Research Institute(VHIR) Department of Medicine Autonomous University of Barcelona Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas(CIBERDEM) Instituto de Salud CarlosⅢ(ICSⅢ)

Retinal neurodegeneration plays a significant role in the pathogenesis of diabetic retinopathy(DR),the leading cause of preventable *** fact,the American Diabetes Association has defined DR as a highly specific neurovascular complication(Solomon et al.,2017).Therefore,it is no longer acceptable to consider DR as merely a microvascular *** this regard,the term diabetic retinal disease(DRD)has been proposed as a broader term comprising microangiopathy and ***,there are currently no treatments available that directly target the neurodegenerative changes of *** paper will give new insights into the translational research in this field with particular emphasis on glucagon-like peptide 1/dipeptidyl peptidase IV(GLP-1/DPP-IV)inhibitors.

关键词： neurodegeneration ocular insight

Using fused filament fabrication to improve the tribocorrosion behaviour of 17-4 PH SS in comparison to other metal forming techniques

在线全文

学校读者我要写书评

暂无评论

Friction 2024年第10期12卷 2325-2343页

作者： cristina GARCÍA-CABEZÓN Juan Alfonso NARANJO Celia GARCÍA-HERNÁNDEZ cristina BERGES Gemma HERRANZ Fernando MARTÍN-PEDROSA Materials Engineering E.I.I.Universidad de ValladolidValladolid 47011Spain INEI-Escuela Técnica Superior de Ingeniería Industrial(ETSII) Universidad de Castilla La ManchaCastilla-La Mancha 13071Spain

Fused filament fabrication(FFF)is one of the additive manufacturing processes which has gained more interest because of its simplicity and *** technology is similar to the conventional metal injection moulding(MIM)process,consisting of the feedstock preparation of metal powder and polymer binders,followed by layer-by-layer 3D printing(FFF)or injection(MIM)to create green parts and,finally,debinding and ***,both technologies provide near-dense *** work presents an in-depth study of the processing method’s *** porosity,microstructure,hardness,corrosion,and tribocorrosion behaviour are compared for 17-4 PH SS samples processed from powder by additive manufacturing using FFF and MIM,as well as conventional powder metallurgy(PM)*** samples exhibited the highest macro and microhardness,while corrosion behaviour was similar for both MIM and FFF samples,but superior in comparison to conventional PM ***,the FFF-as fabricated samples displayed a significant improvement in tribocorrosion resistance that could be explained by the higher proportion of delta ferrite and retained austenite in their microstructure.

关键词： 17-4 PH SS fused filament fabrication(FFF) metal injection moulding(MIM) corrosion behaviour powder metallurgy(PM) tribocorrosion behaviour

Circadian rhythm disruption and retinal dysfunction:a bidirectional link in Alzheimer’s disease?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第9期19卷 1967-1972页

作者： Laura Carrero DesireéAntequera cristina Municio Eva Carro Group of Neurodegenerative Diseases Hospital Universitario 12 de Octubre Research Institute(imas12)MadridSpainNetwork Center for Biomedical Research in Neurodegenerative Diseases(CIBERNED)ISCIIIMadridSpain PhD Program in Neuroscience Autonoma de Madrid UniversityMadridSpain Neurobiology of Alzheimer’s Disease Unit Functional Unit for Research into Chronic DiseasesInstituto de Salud Carlos IIIMadridSpainNetwork Centre for Biomedical Research in Neurodegenerative Diseases(CIBERNED)ISCIIIMadridSpain

Dysfunction in circadian rhythms is a common occurrence in patients with Alzheimer’s disease.A predominant function of the retina is circadian synchronization,carrying information to the brain through the retinohypothalamic tract,which projects to the suprachiasmatic ***,Alzheimer’s disease hallmarks,including amyloid-β,are present in the retinas of Alzheimer’s disease patients,followed/associated by structural and functional ***,the mechanistic link between circadian dysfunction and the pathological changes affecting the retina in Alzheimer’s disease is not fully understood,although some studies point to the possibility that retinal dysfunction could be considered an early pathological process that directly modulates the circadian rhythm.

关键词： Alzheimer’s disease amyloid circadian rhythm neurodegeneration retina

Biodegradability of bioplastics in different aquatic environments:A systematic review

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第8期142卷 169-181页

作者： Maria cristina Lavagnolo Valentina Poli Anna Maria Zampini Valentina Grossule Department of Civil Environmental and Architectural Engineering-Laboratory of Environmental EngineeringUniversity of PadovaLungargine Rovetta 8Padova 35100Italy

Bioplastics were first introduced as environmentally friendly materials,with properties similar to those of conventional plastics.A bioplastic is defined as biodegradable if it can be decomposed into carbon dioxide under aerobic degradation,or methane and CO_(2)under anaerobic conditions,inorganic compounds,and new cellular biomass,by the action of naturally occurring *** definition however does not provide any information on the environmental conditions,timescale and extent at which decomposition processes should *** regard to the aquatic environment,recognized standards have been established to assess the ability of plastics to undergo biodegradation;however,these standards fail to provide clear targets to be met to allow labelling of a bioplastic as ***,these standards grant the user an extensive leeway in the choice of process *** these reasons,the comparison of results deriving from different studies is *** authors analysed and discussed the degree of biodegradability of a series of biodegradable bioplastics in aquatic environments(both fresh and salt water)using the results obtained in the laboratory and from on-site testing in the context of different research *** Oxygen Demand(BOD),CO_(2)evolution,surface erosion and weight loss were the main parameters used by researchers to describe the percentage of *** results showed a large variability both in weight loss and BOD,even when evaluating the same type of *** confirms the need for a reference range of values to be established with regard to parameters applied in defining the biodegradability of bioplastics.

关键词： Biodegradation Bioplastic Plastic Natural environment Plastic waste

Insights on ZEB1-AS1:emerging role from cancer to neurodegeneration

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第6期19卷 1187-1188页

作者： Stephana Carelli Federica Rey Erika Maghraby cristina Cereda Pediatric Research Center“Romeo ed Enrica Invernizzi” Department of Biomedical and Clinical SciencesUniversity of MilanMilanItaly Center of Functional Genomics and Rare Diseases Department of PediatricsBuzzi Children’s HospitalMilanItaly Department of Biology and Biotechnology“L.Spallanzani” University of PaviaPaviaItaly

Implications for lncRNAs in the central nervous system:Transcriptional dysregulation is a key contributor to the pathogenesis of a wide range of diseases and long non-coding RNAs(lncRNAs)are highly expressed in the nervous ***,amongst the over 50,000 lncRNAs expressed in the human genome,more than 40%are specifically expressed in the brain where their roles in brain development,neuron functions,maintenance.

关键词： ZEB1 diseases pathogenesis

Unveiling sinus venosus atrial septal defect and partial anomalous pulmonary venous return in an elderly patient

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2024年第4期21卷 462-464页

作者： cristina M Font Anamarys Blanco Fernandez Dinesh Kadariya Department of Medicine Division of CardiologyUniversity of Florida College of MedicineJacksonvilleFloridaUSA

Sinus venosus defect(SVD) accounts for 4%–11% of all atrial septal defects(ASD) and may present with dyspnea, heart failure(HF), palpitations, or angina.^[1] The malformation typically involves an interatrial communication due to a deficiency in the common wall connecting the right pulmonary veins and the superior vena cava(SVC) and often accompanies anomalous pulmonary venous connection of some or all of the pulmonary veins.

关键词： atrial septal venous

Physical activity and amyloid beta in middle-aged and older adults:A systematic review and meta-analysis

在线全文

学校读者我要写书评

暂无评论

Journal of Sport and Health Science 2024年第2期13卷 133-144页

作者： María Rodriguez-Ayllon Patricio Solis-Urra cristina Arroyo-ávila Miriam álvarez-Ortega Pablo Molina-García cristina Molina-Hidalgo Manuel Gómez-Río Belinda Brown Kirk I.Erickson Irene Esteban-Cornejo Department of Epidemiology Erasmus University Medical Center RotterdamRotterdamGD 3015the Netherlands Department of Physical Education and Sports Faculty of Sport SciencesSport and Health University Research Institute(iMUDS)University of GranadaGranada 18071Spain Faculty of Education and Social Sciences Universidad Andres BelloVina del Mar 2531015Chile Department of Nuclear Medicine Virgen de las Nieves University HospitalInstitute of Biosanitary Research of Granada(IBS)Granada 18014Spain Physical Medicine and Rehabilitation Service Virgen de las Nieves University HospitalInstitute of Biosanitary Research of Granada(IBS)Granada 18014Spain Department of Psychology University of PittsburghPittsburghPA 15260USA Centre for Healthy Ageing Health Futures InstituteMurdoch UniversityMurdochWA 6150Australia School of Medical and Health Sciences Edith Cowan UniversityJoondalupWA 6027Australia Advent Health Research Institute Neuroscience Institute OrlandoOrlandoFL 32803USA Physiopathology of Obesity and Nutrition Research Center(CIBERobn) Institute of Health Carlos Ⅲ(ISCⅢ)Madrid 28029Spain

Background:One of the pathological hallmarks distinguishing Alzheimer’s disease from other dementias is the accumulation of amyloid beta(Aβ).Higher physical activity is associated with decreased dementia risk,and one potential path could be through Aβlevels *** aimed to explore the relationship between physical activity and Aβin middle-aged and older ***:A systematic search of PubMed,Web of Science,PsycINFO,Cochrane Central Register of Controlled Trials,and SPORTDiscus was performed from inception to April 28,*** were eligible if they included physical activity and Aβdata in adults aged 45 years or ***-level metaanalyses of intervention and observational studies were performed to examine the role of physical activity in modulating Aβ***:In total,37 articles were included(8 randomized controlled trials,3 non-randomized controlled trials,4 prospective longitudinal studies,and 22 cross-sectional studies).The overall effect size of physical activity interventions on changes in blood Aβwas medium(pooled standardized mean difference=-0.69,95%confidence interval(95%CI):-1.41 to 0.03;I^(2)=74.6%).However,these results were not statistically significant,and there were not enough studies to explore the effects of physical activity on cerebrospinal fluid(CSF)and brain Aβ.Data from observational studies were examined based on measurements of Aβin the brain using positron emission tomography scans,CSF,and *** physical activity was positively associated with Aβonly in the CSF(Estimate r=0.12;95%CI:0.05-0.18;I^(2)=38.00%).Conclusion:Physical activity might moderately reduce blood Aβin middle-aged and older ***,results were only near statistical significance and might be interpreted with caution given the methodological limitations observed in some of the included *** observational studies,higher levels of physical activity were positively associated with Aβonly in ***,further research is needed t

关键词： Aging Cognitive impairment Dementia Exercise PET

Contrast-enhanced guided endoscopic ultrasound procedures

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第17期30卷 2311-2320页

作者： Marcel Ioan Gheorghiu Andrada Seicean cristina Pojoga Claudia Hagiu Radu Seicean Zeno Sparchez Department of Gastroenterology “Prof.Dr.Octavian Fodor”Regional Institute of Gastroenterology and Hepatology"Iuliu Hatieganu"University of Medicine and PharmacyCluj-Napoca 400162ClujRomania Department of Clinical Psychology and Psychotherapy International Institute for Advanced Study of Psychotherapy and Applied Mental HealthBabeș-Bolyai UniversityCluj-Napoca 400375ClujRomania The First Surgical Clinic "Iuliu Hatieganu"University of Medicine and PharmacyCluj Napoca 400006ClujRomania

Contrast-enhanced endoscopic ultrasound(CH-EUS)can overcome the limi-tations of endoscopic ultrasound-guided acquisition by identifying microvessels inside inhomogeneous tumours and improving the characterization of these *** the initial enthusiasm that oriented needle sampling under CH-EUS guidance could provide better diagnostic yield in pancreatic solid lesions,further studies did not confirm the supplementary values in cases of tissue acquisition guided by *** review details the knowledge based on the available data on contrast-guided *** indications for CH-EUS tissue acquisition include isoechoic EUS lesions with poor visible delineation where CH-EUS can differentiate the lesion vascularisation from the surrounding parenchyma and also the mural nodules within biliopancreatic cystic lesions,which occur in select ***,the roles of CH-EUS-guided therapy in patients whose pancreatic fluid collections or bile ducts that have an echogenic content have indications for drainage,and patients who have nonvisualized vessels that need to be highlighted via Doppler EUS are *** indication is represented if there is a need for an immediate assessment of the post-radiofrequency ablation of pancreatic neuroendocrine tumours,in which case CH-EUS can be used to reveal the incomplete tumour destruction.

关键词： Endosonography Contrast-enhanced endoscopic ultrasound Tissue acquisition Fine needle aspiration Fine needle biopsy Drainage Pancreatic fluid collections Biopsy Pancreas