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Differential response of injured and healthy retinas to syngeneic and allogeneic transplantation of a clonal cell line of immortalized olfactory ensheathing glia:a double-edged sword

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neural Regeneration Research 2025年第8期20卷 2395-2407页

作者： María norte-Muñoz María Portela-Lomba Paloma sobrado-Calvo Diana simón Johnny Di Pierdomenico Alejandro Gallego-Ortega Mar Pérez JoséMCabrera-Maqueda Javier sierra Manuel Vidal-sanz María Teresa Moreno-Flores Marta Agudo-Barriuso Grupo de Investigación Oftalmología Experimental Departamento de OftalmologíaOptometríaOtorrinolaringología y Anatomía PatológicaFacultad de MedicinaUniversidad de MurciaInstituto Murciano de Investigación Biosanitaria(IMIB)Campus de Ciencias de la SaludMurciaSpain Experimental sciences Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain Anatomy Histology and Neuroscience DepartmentMedicine FacultyUniversidad Autónoma de MadridMadridSpain Center of neuroimmunology Service of NeurologyLaboratory of Advanced Imaging in Neuroimmunological DiseasesHospital Clínic of BarcelonaInstitut d’Investigacions Biomèdiques August Pi i Sunyer(IDIBAPS)and Universitat de BarcelonaBarcelonaSpain Medicine Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain

Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic ***,it is unknown whether olfactory ensheathing glia also have neuroprotective *** ensheathing glia express brain-derived neurotrophic factor,one of the best neuroprotectants for axotomized retinal ganglion ***,we aimed to investigate the neuroprotective capacity of olfactory ensheating glia after optic nerve *** ensheathing glia cells from an established rat immortalized clonal cell line,TEG3,were intravitreally injected in intact and axotomized retinas in syngeneic and allogeneic mode with or without microglial inhibition or immunosuppressive *** and gene expression analyses were *** bulb-derived primary olfactory ensheathing glia and TEG3 express major histocompatibility complex classⅡ*** and syngenically transplanted TEG3 cells survived in the vitreous for up to 21 days,forming an *** axotomized retinas,only the allogeneic TEG3 transplant rescued retinal ganglion cells at 7 days but not at 21 *** these retinas,microglial anatomical activation was higher than after optic nerve crush *** intact retinas,both transplants activated microglial cells and caused retinal ganglion cell death at 21 days,a loss that was higher after allotransplantation,triggered by pyroptosis and partially rescued by microglial inhibition or ***,neuroprotection of axotomized retinal ganglion cells did not improve with these *** different neuroprotective properties,different toxic effects,and different responses to microglial inhibitory treatments of olfactory ensheathing glia in the retina depending on the type of transplant highlight the importance of thorough preclinical studies to explore these variables.

关键词： cell therapy immune recognition major histocompatibility complex class II(MHCII) neuroprotection olfactory ensheathing glia retinal ganglion cells

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Assessment of Mg(OH)_(2)/TiO_(2) coating in the Mg-Ca-Zn alloy for improved corrosion resistance and antibacterial performance

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Journal of Magnesium and Alloys 2023年第1期11卷 361-378页

作者： Leonardo Hernández jes.s.ramón-sierra Montserrat soria-Castro Ángel Bacelis Geonel Rodríguez-Gattorno Elizabeth Ortiz-Vázquez Gloria Acosta Applied Physics Department Center for Research and Advanced Studies of the National Polytechnic Institute(CINVESTAV-IPN)Carr.Ant.a Progreso km.6C.P.97310MeridaYucatanMexico Tecnológico nacional de México/Instituto Tecnológico de Mérida.Av.Tecnológico s/n Km.4.5 ant.Carr.Mérida-Progreso C.P.97118MéridaYucatánMéxico Facultad de Química Universidad Nacional Autónoma de México(UNAM)Av.Universidad 3000C.P.04510CoyoacánCDMXMéxico

The high activity of metallic magnesium and alloys limits its potential in biomedical applications;in recent years,extensive efforts have been devoted to modulating this *** this work,we present Mg(OH)_(2) and TiO_(2)barrier coatings to reduce the degradation of magnesium alloy(Mg-Ca-Zn)*** coatings were deposited by the anodization method and the spin-coating technique,*** anodized layer was coated with TiO_(2)generated from the hydrolysis of 3%weight of TTIP(Ti[OCH(CH_(3))_(2)]_(4),Titanium(IV)isopropoxide)in 2-Propanol deposited by the spin-coating *** the degradation in Ringer’s solution by electrochemical impedance spectroscopy and OCP revealed a 98%reduction in pittings in uncoated samples after 14 days of *** p H measurements revealed that the TiO_(2)coating reduced the alkalization of the physiological environment,keeping the pH at 6.0 *** vitro studies of two types of bacteria(*** and ***)exhibited zones of inhibition in the agar and activity bactericidal(kill time test).The mechanisms behind the improved degradation resistance and enhanced antibacterial activity are presented and discussed *** modification with Mg(OH)_(2)/TiO_(2)coatings is a promising strategy to control the biodegradation of magnesium implants for bone regeneration.

关键词： Magnesium alloy EIs Mg(OH)_(2) TiO_(2) Antibacterial coatings

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site Characterization Index for Continuous Power Quality Monitoring Based on Higher-order statistics

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Journal of Modern Power systems and Clean Energy 2022年第1期10卷 222-231页

作者： Olivia Florencias-Oliveros Juan-José González-de-la-Rosa Jose-María sierra-Fernández Agustín Agüera-Pérez Manuel-jesús Espinosa-Gavira José-Carlos Palomares-salas Department of Automation Engineering ElectronicsArchitecture and Computers NetworksResearch Group TIC168Higher Polytechnic SchoolUniversity of CádizAlgeciras 11202Spain

The high penetration of distributed generation(DG)has set up a challenge for energy management and consequently for the monitoring and assessment of power quality(PQ).Besides,there are new types of disturbances owing to the uncontrolled connections of non-linear *** stochastic behaviour triggers the need for new holistic indicators which also deal with big data of PQ in terms of compression and scalability so as to extract the useful information regarding different network states and the prevailing PQ disturbances for future risk assessment and energy management *** and continuous monitoring would guarantee the report to claim for damages and to assess the risk of PQ *** this context,we propose a measurement method that postulates the use of two-dimensional(2D)diagrams based on higher-order statistics(HOss)and a previous voltage quality index that assesses the voltage supply waveform in a continous monitoring *** suitable for both PQ and reliability applications,the results conclude that the inclusion of HOs measurements in the industrial metrological reports helps characterize the deviations of the voltage supply waveform,extracting the individual customers’pattern fingerprint,and compressing the data from both time and spatial *** method allows a continuous and robust performance needed in the sG ***,the method can be used by an average consumer as a probabilistic method to assess the risk of PQ deviations in site characterization.

关键词： Continuous statistical monitoring big data data compression higher-order statistics(HOss) power quality(PQ)

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An unsupervised pattern recognition methodology based on factor analysis and a genetic-DBsCAn algorithm to infer operational conditions from strain measurements in structural applications

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Chinese Journal of Aeronautics 2021年第2期34卷 165-181页

作者： Juan Carlos PERAFAn-LOPEZ Julian sierra-PEREZ Grupo de Investigacion en Ingenieria Aeroespacial Universidad Pontificia BolivarianaCircular 170-01Medellin 050031Colombia

structural Health Monitoring(sHM) suggests the use of machine learning algorithms with the aim of understanding specific behaviors in a structural system. This work introduces a pattern recognition methodology for operational condition clustering in a structure sample using the well known Density Based spatial Clustering of Applications with noise(DBsCAn) *** methodology was validated using a data set from an experiment with 32 Fiber Bragg Gratings bonded to an aluminum beam placed in cantilever and submitted to cyclic bending loads under 13 different operational conditions(pitch angles). Further, the computational cost and precision of the machine learning pipeline called FA + GA-DBsCAn(which employs a combination of machine learning techniques including factor analysis for dimensionality reduction and a genetic algorithm for the automatic selection of initial parameters of DBsCAn) was measured. The obtained results have shown a good performance, detecting 12 of 13 operational conditions, with an overall precision over 90%.

关键词： Clustering DBsCAn Factor analysis FBGs Pattern recognition strain field

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Celecoxib enhances the detoxification of diethylnitrosamine in rat liver cancer

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World Journal of Gastroenterology 2009年第19期15卷 2345-2350页

作者： Martha Estela salcido-neyoy Adolfo sierra-santoyo Olga Beltrán-ramírez José Roberto Macías-Pérez saúl Villa-Trevio Department of Cell Biology Center of Research and Advanced Studies of the National Politechnic InstituteMexicoDFCP 07360México External section of Toxicology Center of Research and Advanced Studies of the National Politechnic InstituteMexicoDFCP 07360México

AIM： To study the effect of celecoxib （CXB） on diethylnitrosamine activation through the regulation of cytochrome P450 in a hepatocarcinogenesis ***： six-week-old male sprague-Dawley rats were randomly divided into five groups, a non-treated group （nT）, a diethylnitrosamine-treated group （DEn）, a DEn＋CXB-treated group （DEn＋CXB）,and CXB 8 d-treated and CXB 32 d-treated groups. The effects of celecoxib on the enzymatic activities of CYP1A1, 2A, 2B1/2, and 2E1 were assessed in hepatic microsomes 24 h after DEn *** in CYPIA1 and CYP2B1/2 protein expression were also evaluated. The rate of DEn metabolism was measured by the production of the deethylation metabolite acetaldehyde, and the denitrosation metabolite ***： DEn＋CXB administration produced a significant increase in the enzymatic activities ofCYP2B1/2 and 1A1, whereas it did not change the activities of CYP2A and 2E1, compared to that of the DEn group. CXB treatment for eight days did not produce a significant effect on enzymatic activity when compared to the nT group; however, when it was administered for prolonged times （CXB 32 d group）,the enzymatic activities were increased in a similar pattern to those in the DEn＋CXB group. The observed increase in the enzymatic activities in the DEn＋CXB group was accompanied by an increase in the CYP2B1/2 protein levels; no changes were observed in the levels of CYPIA1. In vitro, CXB increased the denitrosation of DEn, a pathway of metabolic detoxification. The addition of sKF-525A, a preferential inhibitor of CYP2B, abrogated the denitrosation of ***： These results suggest that the mechanism of action of CXB involves enhancement of the detoxification of DEn by an increasing denitrosation via CYP2B1/2.

关键词： Hepatocarcinogenesis Chemoprevention Diebhylnitrosamine Denitrosation Celecoxib CytochromesP450

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Clinical characteristics and type of antithrombotic treatment in a spanish cohort of elderly patients with atrial fibrillation according to dependency, frailty and cognitive impairment

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Journal of Geriatric Cardiology 2018年第4期15卷 268-274页

作者： Jose Maria Mostaza Manuel jesús Romero Jiménez Fernando José Ruiz Laiglesia José Antonio Díaz Peromingo Manuel Beltrán Robles Ernesto Guevara sierra Ana santander Bilbao Carmen suárez Hospital Carlos III Madrid Spain Hospital Infanta Elena Huelva Spain Hospital Clínico Universitario Lozano Blesa Zaragoza Spain Complejo Hospitalario Universitario de santiago Santiago de Compostela Spain Hospital Virgen del Camino Sanlucar-Cádiz Spain Centro socio-sanitario Vallparadís Terrassa Spain Hospital de Basurto Bilbao Spain Hospital Universitario de La Princesa Madrid Spain

Background Available data regarding clinical profile and management of elderly patients with atrial fibrillation （AF） according to dependency, fragility and cognitive impairment are scarce. The objective of the study was to analyze the biodemographic data, clinical profile and antithrombotic treatment according to dependency, fragility and cognitive impairment in elderly AF patients. Methods Cross- sectional and multi-center study performed in consecutive AF patients ≥ 75 years treated with oral anticoagulants ≥ 3 months attended in Internal Medicine Departments in spain. Results A total of 837 patients （83.0 ± 5.0 years; CHA2Ds2-VAsc： 5.0 ± 1.4; HAs-BLED： 2.1 ± 0.9） were included. 44.4% of patients had some degree of dependency, 43.3% were fragile, and 32.3% had cognitive impairment. Patients with any of these conditions were older, had a worse clinical profile, with more comorbidities and higher risks of thromboembolic and bleeding events. All these conditions were independently associated among them. Overall, 70.8% of patients were taking vitamin K antagonists, the remaining 29.2% direct oral anticoagulants and 9.7% oral antiplatelets. This distribution was independent of the presence of dependency or fragility, but there was a trend to a higher prescription of vitamin K antagonists in those patients with cognitive impairment （75.2% vs. 68.8%; P = 0.05）. Conclusions Approximately 32%-44% of elderly anticoagulated AF patients attended have some degree of dependency, fragility and/or cognitive impairment. Patients with any of these conditions are older and have a worse clinical profile. Ap？proximately 71% of patients are taking vitamin K antagonists, regardless dependency or frailty, but with a trend to higher prescription in patients with cognitive impairment.

关键词： Atrial fibrillation Cognitive impairment Dependency Fragility Oral anticoagulants

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Biometric and ICL-related risk factors associated to sub-optimal vaults in eyes implanted with implantable collamer lenses

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Eye and Vision 2021年第5期8卷 253-262页

作者： santiago Cerpa Manito Angel sánchez Trancón Oscar Torrado sierra António Manuel Baptista Pedro Miguel serra Research and Development Department Ophthalmology Clinic Vista Sánchez TrancónBuilding TecnolaserRoom 14 Calle La Violeta06005 BadajozSpain Center of Physics University of MinhoBragaPortugal Optics and Optometry Department Instituto Superior de Educação e CiênciasLisbonPortugal

Background:To identify biometric and implantable collamer lens(ICL)-related risk factors associated with suboptimal postoperative vault in eyes implanted with phakic ***:This study reports a retrospective case series of the first operated eye in 360 patients implanted with myopic spherical or toric ***,white-to-white(WTW),central keratometry(Kc)and central corneal thickness(CCT)were measured using the ***-segment optical coherence tomography(As-OCT,Visante)was applied preoperatively for measuring the horizontal anterior-chamber angle-to-angle distance(ATA),internal anterior chamber depth(ACD),crystalline lens rise(CLR),anterior-chamber angle(ACA)and postoperatively the *** were divided into three vault groups:low(LVG:≤250μm),optimal(OVG:>250 andnd high(HVG:≥1000μm).Multinomial logistic regression(MLR)was used to find the sub-optimal vault ***:MLR showed that CLR,ICL size minus the ATA(ICL size-ATA),age,ICL spherical equivalent(ICLsE)and ICL size as contributing factors for sub-optimal vaults(pseudo-R2=0.40).Increased CLR(OR:1.01,CI:1.00-1.01)and less myopic ICLsE(OR:1.22,CI:1.07-1.40)were risk factors for low *** ICL size-ATA(OR:41.29,CI:10.57-161.22)and the 13.7mm ICL(OR:7.08,CI:3.16-15.89)were risk factors for high vaults,whereas less myopic ICLsE(OR:0.85,CI:0.76-0.95)and older age(OR:0.92,CI:0.88-0.98)were protective ***:High CLR and low ICLsE were the major risk factors in eyes presenting low *** the opposite direction,ICL size-ATA was the major contributor for high *** relationship was more critical in higher myopic ICLsE,younger eyes and when 13.7mm ICL were *** findings show that factors influencing the vault have differentiated weight of influence depending on the type of vault(low,optimal or high).

关键词： Implantable collamer lens Refractive surgery Vault Risk factors

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Importance of Quercus *** diversity and biomass of vascular epiphytes in a managed pine-oak forest in southern Mexico

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Forest Ecosystems 2022年第3期9卷 366-377页

作者： nayely Martínez-Meléndez neptalí ramírez-Marcial José G. García-Franco Manuel jesús Cach-Pérez Pablo Martínez-Zurimendi Departamento de Conservacion de la Biodiversidad El Colegio de la Frontera Sur(ECOSUR)San Cristobal de Las Casas29290ChiapasMexico Red de Ecología Functional Instituto de EcologíaA.C.Xalapa91073VeracruzMexico Departamento de Agricultura Sociedad y AmbienteEl Colegio de la Frontera Sur(ECOSUR)Villahermosa86280TabascoMexico

Background:Forestry management modifies the diversity,structure,and functioning of intervened *** extraction reduces tree density and basal area,leading to changes in the communities of vascular *** objective of this study was to evaluate the diversity and biomass of vascular epiphytes in Quercus trees remaining in two pine-oak forest stands that have been subjected to two stages of the silvicultural Development Method(release cutting,and thinning)in comparison with an unharvested old-secondary forest in southern *** each treatment,richness of epiphytes present on 60 oak trees was recorded and their dry biomass *** calculated the true diversity(Hill numbers)and beta diversity using the Jaccard coefficient of similarity,and generated rank abundance curves per taxonomic epiphyte group(bromeliads,orchids,ferns and others).For each treatment,the relationships between overall diversity and epiphyte biomass to the host trees basal area were analyzed using log linear ***:We recorded a total of 67 species of epiphytes species belonging to 10 families hosted by five species of *** greatest species richness(^(0)D)was recorded in the old-secondary *** common(^(1)D)and dominant(^(2)D)species were recorded in the release cutting than in the other *** diversity and biomass were both slightly related to host tree basal *** of epiphytes was similar(60%)among treatments,although orchids,bromeliads,and other families were more diverse in the old-secondary *** bromeliad species were shared across all treatments,although orchids presented the most exclusive species in the unharvested *** bromeliad Tillandsia seleriana provided the greatest contribution to biomass in all treatments,followed by the orchid Camaridium *** linear models indicated that epiphyte diversity was significantly related to treatment,and epiphyte biomass to basal area of host ***:Alt

关键词： Bromeliads Chiapas Ferns Orchids Richness sierra Madre silvicultural development method(sDM)

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A tumor-associated heparan sulfate-related glycosaminoglycan promotes the generation of functional regulatory T cells

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Cellular & Molecular Immunology 2023年第12期20卷 1499-1512页

作者： Leticia Martín-Cruz Marcos Viñuela Ioanna Kalograiaki Alba Angelina Paola Oquist-Phillips Irene Real-Arévalo Francisco Javier Cañada JoséIgnacio Tudela Luis Moltó jesús Moreno-sierra JoséLuis subiza Oscar Palomares Department of Biochemistry and Molecular Biology School of ChemistryComplutense University of MadridMadridSpain Inmunotek Alcaláde HenaresMadridSpain Fundación Investigación Hospital Clínico san Carlos Martin Lagos s/n28040MadridSpain Centro de Investigaciones Biológicas Margarita salas CSICRamiro de Maetzu 928040MadridSpain CIBER de Enfermedades Respiratorias(CIBEREs)Avda Monforte de Lemos3-528029MadridSpain servicio de Urología Hospital Clínico San CarlosUniversidad Complutense de MadridMartín Lagos s/n28040MadridSpain

Functional Tregs play a key role in tumor development and progression,representing a major barrier to anticancer *** mechanisms by which Tregs are generated in cancer and the influence of the tumor microenvironment on these processes remain incompletely ***,by using nMR,chemoenzymatic structural assays and a plethora of in vitro and in vivo functional analyses,we demonstrate that the tumoral carbohydrate A10(Ca10),a cell-surface carbohydrate derived from Ehrlich’s tumor(ET)cells,is a heparan sulfate-related proteoglycan that enhances glycolysis and promotes the development of tolerogenic features in human ***10-stimulated human DCs generate highly suppressive Tregs by mechanisms partially dependent on metabolic reprogramming,PD-L1,IL-10,and ***10 also reprograms the differentiation of human monocytes into DCs with tolerogenic *** solid ET-bearing mice,we found positive correlations between Ca10 serum levels,tumor size and splenic Treg *** of isolated Ca10 also increases the proportion of splenic Tregs in tumor-free ***,we provide evidence supporting the presence of a circulating human Ca10 counterpart(Ca10H)and show,for the first time,that serum levels of Ca10H are increased in patients suffering from different cancer types compared to healthy *** note,these levels are higher in prostate cancer patients with bone metastases than in prostate cancer patients without ***,we reveal novel molecular mechanisms by which heparan sulfate-related structures associated with tumor cells promote the generation of functional Tregs in *** discovery of this novel structural-functional relationship may open new avenues of research with important clinical implications in cancer treatment.

关键词： Tumoral carbohydrate A10 Heparan sulfate-related proteoglycan Cancer immunology Dendritic cell Regulatory T cell

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Efficiency of white lupin in the removal of mercury from contaminated soils: soil and hydroponic experiments

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Journal of Environmental sciences 2010年第3期22卷 421-427页

作者： Pilar Zornoza Rocío Milln M. Jos sierra Almudena seco Elvira Esteban Department of Agricultural science Autonomous University of Madrid Francisco Tomsy Valiente 7. E-28049 Madrid Spain Research Center for Energy Environment and Technology Environmental Department. Soil Degradation Research Unit. Av. Complutense 22. E-28040 Madrid Spain

This study examined the ability of the white lupin to remove mercury （Hg） from a hydroponic system （Hg concentrations 0, 1.25, 2.5, 5 and 10 μmol/L） and from soil in pots and lysimeters （total Hg concentration （19.2 ± 1.9） mg/kg availability 0.07%, and （28.9 ± 0.4） mg/kg availability 0.09%, respectively）, and investigated the accumulation and distribution of Hg in different parts of the plant. White lupin roots efficiently took up Hg, but its translocation to the harvestable parts of the plant was low. The Hg concentration in the seeds posed no risk to human health according to the recommendations of the World Health Organization, but the shoots should not be used as fodder for livestock, at least when unmixed with other fodder crops. The accumulation of Hg in the hydroponically-grown plants was linear over the concentration range tested. The amount of Hg retained in the roots, relative to the shoots, was almost constant irrespective of Hg dose （90%）. In the soil experiments, Hg accumulation increased with exposure time and was the greater in the lysimeter than in the pot experiments. Although Hg removal was the greater in the hydroponic system, revealing the potential of the white lupin to extract Hg, bioaccumulation was the greatest in the lysimeter-grown plants; the latter system more likely reflects the true behaviour of white lupin in the field when Hg availability is a factor that limits Hg removal. The present results suggest that the white lupin could be used in long-term soil reclamation strategies that include the goal of profitable land use in Hg-polluted areas.

关键词： edible plant parts hydroponic-soil-lysimeter experiments Lupinus albus L. mercury

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