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Injection of bone marrow mesenchymal stem cells by intravenous or intraperitoneal routes is a viable alternative to spinal cord injury treatment in mice

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Neural Regeneration Research 2018年第6期13卷 1046-1053页

作者： Bruna dos Santos Ramalho FernANDa Martins de Almeida Conrado Mendonca Sales Silmara de Lima Ana Maria Blanco Martinez laboratorio de Neurodegeneracao e Reparo Departamento de Patologia - Faculdade de Medicina HUCFF Universidade Federal do Rio de Janeiro Rio de laneiro Brazil

In spite of advances in surgical care and rehabilitation, the consequences of spinal cord injury （SCI） are still challenging. Several experimental therapeutic strategies have been studied in the SCI field, and recent advances have led to the development of therapies that may act on the inhibitory microenvironment. Assorted lineages of stem cells are considered a good treatment for SCI. This study investigated the effect of systemic transplantation of mesenchymal stem cells （MSCs） in a compressive SCI model. Here we present results of the intraperitoneal route, which has not been used previously for MSC administration after compressive SCI. We used adult female C57BL/6 mice that underwent laminectomy at the T9 level, followed by spinal cord compression for 1 minute with a 30-g vascular clip. The animals were divided into five groups： sham （anesthesia and laminectomy but without compression injury induction）, MSC i.p. （intraperitoneal injection of 8×10^5 MSCs in 500 μL of DMEM at 7 days after SCI）, MSC i.v. （intravenous injection of 8 × 10^5 MSCs in 500μL of DMEM at 7 days after SCI）, DMEM i.p. （intraperitoneal injection of 500μL of DMEM at 7 days after SCI）, DMEM i.v. （intravenous injection of 500 μL of DMEM at 7 days after SCI）. The effects of MSCs transplantation in white matter sparing were analyzed by luxol fast blue staining. The number of preserved fibers was counted in semithin sections stained with toluidine blue and the presence of trophic factors was analyzed by immunohistochemistry. In addition, we analyzed the locomotor performance with Basso Mouse Scale and Global Mobility Test. Our results showed white matter preservation and a larger number of preserved fibers in the MSC groups than in the DMEM groups. Furthermore, the MSC groups had higher levels of trophic factors （brain-derived neurotrophic factor, nerve growth factor, neurotrophin-3 and neurotrophin-4） in the spinal cord and improved locomotor performance. Our results indicate that injection of MSC

关键词： spinal cord injury mesenchymal stem cells intravenous route intraperitoneal route functional recovery systemic transplantation neural regeneration

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DNA metabarcoding reveals seasonal changes in diet composition across four arthropod-eating lizard species(Phrynosomatidae:Sceloporus)

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Integrative Zoology 2024年第3期19卷 480-495页

作者： Mauricio HERNÁNdeZ Stephanie HEREIRA-PACHECO Antton ALBERDI Aníbal H.DÍAZ de LA VEGA-PÉREZ Arturo ESTRADA-TORRES Sergio ANCONA Yendi E.NAVARRO-NOYA Doctorado en Ciencias Biológicas Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Estación Científica La Malinche Centro Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Center for Evolutionary Hologenomics The Globe InstituteUniversity of CopenhagenCopenhagenDenmark Consejo Nacional de Ciencia y Tecnología-Centro Tlaxcala de biología de la Conducta Universidad Autónoma de TlaxcalaTlaxcalaMexico departamento de Ecología Evolutiva Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoMexico CityMexico laboratorio de Interacciones Bióticas Centro de Investigación en Ciencias BiológicasUniversidad Autónoma de TlaxcalaSan Felipe IxtacuixtlaTlaxcalaMexico

Diet composition and its ecological drivers are rarely investigated in coexisting closely related *** used a molecular approach to characterize the seasonal variation in diet composition in four spiny lizard species inhabiting a mountainous *** metabarcoding revealed that the lizards Sceloporus aeneus,***,***,and *** mostly consumed arthropods of the orders Hemiptera,Araneae,Hymenoptera,and *** terrestrial lizards *** and *** mostly predated ants and spiders,whereas the arboreal–saxicolous *** and saxicolous *** largely consumed grasshoppers and *** taxonomic and phylogenetic diversity of the prey was higher during the dry season than the rainy season,likely because reduced prey availability in the dry season forced lizards to diversify their diets to meet their nutritional *** and phylogenetic composition varied seasonally depending on the species,but only dietary composition varied with *** dietary turnover was greater in *** than in ***,suggesting site-specific seasonal variability in prey availability;no other differences among species were ***,which lives at the highest altitude in our study site,displayed interseasonal variation in diet *** differences were correlated with the species’feeding strategies and elevational distribution,which likely contributed to the coexistence of these lizard species in the studied geographic area and beyond.

关键词： arthropod-eating lizards diet breadth environmental barcoding mountainous ecosystem seasonal dietary shifts

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Shade coffee plantations maintain woody plant diversity and structure in a cloud forest landscape of southern Mexico

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Journal of Forestry Research 2021年第2期32卷 637-648页

作者： Edson AAlvarez-Alvarez R.Carlos Almazán-Nunez Fernando González-García Marlene Brito-Millán Alfredo Méndez-Bahena Sergio García-Ibáñez Maestría en Recursos Naturales y Ecología Facultad de Ecología MarinaUniversidad Autónoma de Guerrero39390 AcapulcoGuerreroMexico laboratorio Integral de Fauna Silvestre Facultad de Ciencias Químico-BiológicasUniversidad Autónoma de Guerrero39090 Chilpancingo de los BravoGuerreroMexico Red biología y Conservación de Vertebrados Instituto de EcologíaA.C.CP 91073 XalapaVeracruzMexico University of California Institute for Mexico and the United States(UC MEXUS) Cuerpo Académico Biodiversidad y Gestión Ambiental SustentableFacultad de Ciencias Químico-BiológicasUniversidad Autónoma de Guerrero39090 Chilpancingo de los BravoGuerreroMexico laboratorio de biología de la Conservación Facultad de Ciencias Químico-BiológicasUniversidad Autónoma de Guerrero39090 Chilpancingo de los BravoGuerreroMexico laboratorio de Ecología Cuantitativa Facultad de Ecología MarinaUniversidad Autónoma de Guerrero39390 AcapulcoGuerreroMexico

Cloud forest ecosystems of the Latin American tropics are highly threatened by changes in land-use such as expanding croplands and livestock pastures that promote shifts in the structure and composition of plant communities in these ***,shade coffee plantations represent a forest management alternative that has been shown to maintain biodiversity in these *** this study,we evaluated changes in the composition,diversity,and structure of Mexican cloud-forest woody species for three land use categories:cattle pastures,shade coffee plantations and advanced succession *** each category,fifteen 0.28-ha plots were established and the composition and diversity of vegetation was *** of species was analyzed using ordination methods,and alpha diversity was compared using Hill ***-seven woody species belonging to 40 families were *** richness and diversity was high in both the advanced successional forest and coffee plantations compared to cattle *** composition and structure was similar between late succession forests and coffee plantations with both land uses also being more structurally complex than cattle *** results show how shade coffee cultivation is a land-use activity that maintains woody plant communities in a manner that aligns with biodiversity conservation.

关键词： Land uses Late succession Plant diversity Shade coffee Vegetation structure

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Masting effect on alpha and beta avian diversity in fragmented forests of relict?endangered Mexican Beech(Fagus grandifolia ***)

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Avian Research 2021年第4期12卷 576-590页

作者： Ernesto CRodríguez-Ramírez Levinn Camacho-Islas Ana Paola Martínez-Falcón Isolda Luna-Vega Pilar Carbó-Ramírez laboratorio de dendrocronología Universidad ContinentalHuancayoPerú laboratorio de Biogeografía y Sistemática Universidad Nacional Autonoma de MéxicoCiudad de MéxicoMexico Centro de Investigaciones Biológicas Universidad Autónoma de Estado de HidalgoHidalgoMexico Independent Researcher OuluFinland

Background:Tropical montane cloud forests are one of the most important hotspots on Earth and show presence of relict-endemic and endangered species,representing about 14%of the total tropical forest *** seed production or masting in tropical montane cloud tree species is a widespread reproductive strategy of decidu-ous and evergreen broad-leaved tree associations to decrease costs of reproduction and ensure *** event maintains a high avian diversity,which can be modified by phenological process(seed production and non-seed production).Methods:The main aim of this study was to assess alpha and beta avian diversity and whether the composition of the trophic guild modifies among phenological processes and between two fragmented relict-endangered Mexican Beech(Fagus grandifolia ***)forests(Medio Monte and El Gosco)in the Mexican state of *** addi-tion,we evaluated beechnut ***:We recorded 36 bird species,11 of them included in some conservation risk status,and 5 endemic *** diversity values were dissimilar in avian richness(q=0)among phenological processes and between frag-mented beech *** communities among three phenological processes and between fragmented forests were structurally similar,dominated during immature seeds the Brown-backed Solitaire(granivores-insectivores-frugivores);during mature seeds the White-crowned Parrot(Pionus senilis,granivores-frugivores);and the Dwarf Jay(Cyanolyca nana,insectivores)was abundant during low seed *** complementarity index was high among phenological processes and low between *** found a high bird turnover value between immature seeds—mature seeds and during mature seeds—low seed ***,a similar pattern was recorded between the two study *** production showed a high number of undamaged beechnuts in Medio Monte,while in El Gosco beechnuts were attacked by ***:Our results reflect that masting

关键词： Avian seed consumers Bird species Synchronous seed production Tropical montane cloud forest Turnover Zentrygon albifacies

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Socio-spatial organization reveals paternity and low kinship in the Honduran white bat(Ectophylla alba)in Costa Rica

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Integrative Zoology 2021年第5期16卷 646-658页

作者： Edgar G.GUTIÉRREZ Isabela VIVAS-TORO Daniela CARMONA-RUÍZ David VILLALOBOS-CHAVES Bernal RODRÍGUEZ-HERRERA Melina del REAL-MONROY Gloria LEÓN-AVILA Jorge ORTEGA laboratorio de Bioconservación y Manejo Posgrado en Ciencias QuimicobiológicasDepartamento de ZoologíaEscuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalCiudad de MéxicoMéxico department of biology University of WashingtonSeattleWashingtonUSA Escuela de biología Universidad de Costa RicaSan JoséCosta Rica laboratorio de Genómica Evolutiva Doctorado en Ciencias BásicasUniversidad Autónoma de ZacatecasZacatecasZac.México laboratorio de Genética Posgrado en Ciencias QuimicobiológicasDepartamento de ZoologíaEscuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalCiudad de MéxicoMéxico

Ectophylla alba is a tent-making bat that roosts in mixed-sex clusters comprising adults and *** goal was to determine the genetic identity of individuals belonging to different roosting *** tested the hypothesis of kin selection as a major force structuring group *** used 9 microsatellites designed for *** to determine the genetic identity and probability of parentage of *** analyzed parentage and kinship using the software ML-Relate,GenAIEx,and *** obtained relationship probabilities(0.5)revealed a clear maternal relationship between female adults and offspring with allele compatibility,and at least 5 relationships between male adults and *** found a low degree of relatedness within roosting *** roosting groups at different sites,the mean probability of a half-sibling relationship ranged from 0.214 to 0.244 and,for full-sibling relationship,from 0.383 to ***,adult individuals were poorly related within clusters,and kinship as an evolutionary force could not explain group membership.

关键词： Ectophylla alba group composition kinship microsatellites relatedness

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A PCR and RFLP-based molecular diagnostic algorithm for visceral leishmaniasis

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Asian Pacific Journal of Tropical Medicine 2020年第2期13卷 62-70页

作者： Natalia Souza de Godoy Manoel Sebastiao da Costa Lima-Junior Jose Angelo Lauletta Lindoso Vera Lucia Pereira-Chioccola Thelma Suely Okay Lucia Maria Almeida Braz laboratorio de Parasitologia Médica Departamento de Moléstias Infecciosas e Parasitárias do Hospital das Clinicas HCFMUSPFaculdade de MedicinaUniversidade de Sao PauloSao PauloBrazil laboratorio de Imunopatologia e biologia Molecular-Instituto Aggeu Magalhaes/IAM-FIOCRUZ RecifeBrazil laboratorio de Soroepidemiologia e Imunobiologia-FMUSP Sao PauloBrazil laboratorio de biologia Molecular de Parasitas e Fungos-Instituto Adolfo Lutz Sao PauloBrazil laboratorio de Parasitologia-Instituto de Medicina Tropical de Sao Paulo-USP Sao PauloBrazil

Objective:To determine an algorithm for molecular diagnosis of visceral leishmaniasis(VL)by kinetoplast DNA(kDNA)(RV1/RV2)and internal transcriber spacer(ITS1)(LITSR/L5.8 S)polymerase chain reaction(PCR),complemented by ITS 1 PCR restriction fragment length polymorphism(RFLP),using peripheral blood or bone marrow aspirate from patients with suspected ***:biological samples were submitted to the gold standard for the diagnosis of VL and molecular diagnosis represented by ITS 1 PCR,kDNA PCR,and ITS 1 PCR *** samples were obtained from seven groups:groupⅠ,82 samples from patients with confirmed VL;groupⅡ,16 samples from patients under treatment for VL;groupⅢ,14 samples from dogs with canine visceral leishmaniasis(CVL);groupⅣ,a pool of six experimentally infected sandflies(Lutzomya longipalpis);group V,18 samples from patients with confirmed tegumentary leishmaniasis(TL)and groupsⅥandⅦwere from control groups without ***:The following gold standard and molecular examination results were obtained for each of the seven groups:groupⅠ:parasitologic and immunochromatographic tests showed a sensitivity of 76.3%(61 of 80)and 68.8%(55 of 80),respectively,and a sensitivity of 97.6%(80 of 82)and 92.7%(76 of 82)by ITS1 and kDNA PCR,*** ITS1 PCR RFLP(HaeⅢ)analysis of the 80 positive samples,52.5%(42 of 80)generated three fragments of 180,70,and 50 bp,corresponding to the pattern of Leishmania infantum infantum;groupⅡ:negative for the parasitologic methods and positive for IrK39(100%,16 of 16),presented 12.5%(2 of 16)of positivity by ITS 1 PCR and 25.0%(4 of 16)by kDNA PCR;groupⅢ:positive in the parasitologic and serologic tests(100%,14 of 14),presented 85.7%(12 of 14)of positivity by ITS1 PCR and kDNA ***1 PCR RFLP showed that 83.3%(10 of 12)of the canine samples contained parasites with profiles similar to ***;groupⅣpresented amplifications by ITS1 PCR and kDNA ***1 PCR products were analyzed by RFLP,generating a profile similar to

关键词： Leishmania infantum Molecular diagnosis Visceral leishmaniasis PCR RFLP

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Physiopathology of ischemic stroke and its modulation using memantine:evidence from preclinical stroke

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Neural Regeneration Research 2021年第3期16卷 433-439页

作者： Hilda Martínez-Coria Isabel Arrieta-Cruz María-Esther Cruz Héctor E.López-Valdés División de Investigación Facultad de MedicinaUniversidad Nacional Autónoma de México(UNAM)Ciudad de MéxicoMéxico laboratorio Experimental de Enfermedades Neurodegenerativas Facultad de MedicinaUNAM/Instituto Nacional de Neurología y NeurocirugíaCiudad de MéxicoMéxico departamento de Investigación Básica Instituto Nacional de GeriatríaCiudad de MéxicoMéxico Unidad de Investigación en biología de la Reproducción Laboratorio de NeuroendocrinologíaFacultad de Estudios Superiores ZaragozaUNAMCiudad de MéxicoMéxico Unidad Periférica de Neurociencia Facultad de MedicinaUNAM/Instituto Nacional de Neurología y NeurocirugíaCiudad de MéxicoMéxico

Ischemic stroke is the most common type of cerebrovascular disease and is caused by an interruption of blood flow in the *** this disease,two different damage areas are identifying:the lesion core,in which cells quickly die;and the penumbra(surrounding the lesion core),in which cells are functionally weakened but may recover and restore their *** currently approved treatments for ischemic stroke are the recombinant tissue plasminogen activator and endovascular thrombectomy,but they have a short therapeutic window(4.5 and 6 hours after stroke onset,respectively)and a low percentage of stroke patients actually receive these *** is an approved drug for the treatment of Alzheimer's *** is a noncompetitive,low affinity and use-dependent antagonist of N-methyl-D-aspartate glutamate *** has several advantages over developing a new drug to treat focal ischemic stroke,but the most important is that it has sufficient safe probes in preclinical models and humans,and if the preclinical studies provide more evidence about pharmacological actions in tissue protection and repair,this could help to increase the number of clinical *** present review summarizes the physiopathology of isquemic stroke and the pharmacological actions in neuroprotection and neuroplasticity of memantine in the post stroke stage of preclinical stroke models,to illustrate their potential to improve functional recovery in human patients.

关键词： focal ischemic stroke memantine neuroplasticity neuroprotection stroke therapy

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An Andean tectonic cycle:From crustal thickening to extension in a thin crust(34°-37°SL)

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Geoscience Frontiers 2014年第3期5卷 351-367页

作者： Victor A.Ramos Vanesa D.Litvak Andrés Folguera Mauro Spagnuolo laboratorio de Tectonica Andina del Instituto de Estudios Andinos Don Pablo GroeberCONICET-Universidad de Buenos AiresArgentina

Several orogenic cycles of mountain building and subsequent collapse associated with periods of shal- lowing and steepening of subduction zones have been recognized in recent years in the Andes. Most of them are characterized by widespread crustal delamination expressed by large calderas and rhyolitic flare-up produced by the injection of hot asthenosphere in the subduction wedge. These processes are related to the increase of the subduction angle during trench roll-back. The Payenia paleoflat-slab, in the southern Central Andes of Argentina and Chile （34° -37°S） recorded a complete cycle from crustal thickening and mountain uplift to extensional collapse and normal faulting, which are related to changes in the subduction geometry. The early stages are associated with magmatic expansion and migration, subsequent deformation and broken foreland. New ages and geochemical data show the middle to late Miocene expansion and migration of arc volcanism towards the foreland region was associated with important deformation in the Andean foothills. However, the main difference of this orogenic cycle with the previously described cycles is that the steepening of the oceanic subducted slab is linked to basaltic flooding of large areas in the retroarc under an extensional setting. Crustal delamination is concentrated only in a narrow central belt along the cordilleran axis. The striking differences between the two types of cycles are interpreted to be related to the crustal thickness when steepening the subducting slab, The crustal thickness of the Altiplano is over 60-80 km, whereas Payenia is less than 42 km in the axial part, and near 30 km in the retroarc foothills. The final extensional regime associated with the slab steepening favors the basaltic flooding of more than 8400 km3 in an area larger than 40,000 km2, through 800 central vents and large fissures. These characteristics are unique in the entire present-day Andes.

关键词： Andes Retroarc magmatism Basaltic floods Crustal delamination Flat-slab

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Home range variability,spatial aggregation,and excursions of Akodon azarae and Oligoryzomys flavescens in Pampean agroecosystems

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Integrative Zoology 2020年第5期15卷 401-415页

作者： Irene GOROSITO Ailén BENÍTEZ Maria BUSCH laboratorio de Ecología de PoblacionesFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Airesand Instituto de EcologíaGenética y Evolución de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina laboratorio de Ecología de Poblaciones Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina laboratorio de Ecología de Poblaciones Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos Airesand Instituto de EcologíaGenética y Evolución de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina

Rodents are reservoirs of various types of hantavirus,some of which are agents of hantavirus pulmonary syndrome in *** hantavirus is associated with a single rodent host species but successive spill-over events may eventually lead to host-switching and new species’becoming host of a given *** study aims to gain an understanding of the spatial ecology of two hantavirus-host species,Akodon azarae,and Oligoryzomys flavescens,by identifying factors modulating their home range sizes and stability,and by evaluating intra-and interspecific spatial aggregation for these species and a third one—Oxymycterus rufus—living in *** this,eleven capture-mark-recapture surveys were carried out,spanning 22 *** found that *** males have larger and more mobile home ranges than females,independently of the ***,males could likely have a more relevant role in the transmission of hantavirus because of their greater exposure both to a higher number of contacts between individuals and viral contamination of the ***,*** individuals showed negligible displacements of their home range through time,which could limit the range of hantavirus spread in host *** *** is host to Lechiguanas hantavirus(pathogenic to humans)this result encompasses epidemiological relevance,for it may imply the existence of local foci of ***,individuals of both species performed excursions outside their home *** events could enable hantavirus spread over distances beyond the normal range of movements and lead to new hantavirus outbreaks in formerly non-infected rodent populations,favoring the persistence of the virus in nature.

关键词： hantavirus home range intra-and interspecific contact rodent spatial ecology

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Neuroinflammation and oxidative stress act in concert to promote neurodegeneration in the diabetic retina and optic nerve:galectin-3 participation

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Neural Regeneration Research 2020年第4期15卷 625-635页

作者： Henrique Rocha Mendonca Raul Carpi-Santos Karin da Costa Calaza Ana Maria Blanco Martinez laboratorio de Neurodegeneracao e Reparo Departamento de PatologiaPrograma de Pos-graduacao em Anatomia PatologicaFaculdade de MedicinaHospital Universitrio Clementino Fraga FilhoFederal University of Rio de JaneiroRio de JaneiroBrazil Polo Universitario Macae Unidade Integrada de Pesquisa em Produtos Bioativos e BiocienciasFederal University of Rio de JaneiroMacaeBrazil laboratorio Integrado de Morfologia Instituto de Biodiversidade e SustentabilidadeNucleo de Pesquisas Ecologicas de MacaeFederal University of Rio de JaneiroMacaeBrazil laboratorio de Neurobiologia Celular Instituto de Ciencias BiomedicasCentro de Ciencias da SaudeFederal University of Rio de JaneiroRio de JaneiroBrazil laboratorio de Neurobiologia da Retina Departamento de NeurobiologiaPrograma de Pos-Graduacao em NeurocienciasFluminense Federal UniversityNiteroiBrazil

Diabetes is a lifelong disease characterized by glucose metabolic imbalance,in which low insulin levels or impaired insulin signaling lead to hyperglycemic *** 20 years of diabetes progression,95%of patients will have diabetic retinopathy,the leading cause of visual defects in working-age people *** diabetes is considered a microvascular disease,recent studies have shown that neurodegeneration precedes vascular changes within the diabetic visual system,albeit its mechanisms are still under *** and oxidative stress are intrinsically related phenomena,since macrophage/microglia and astrocytes are the main sources of reactive oxygen species during central nervous system chronic degenerative diseases,and both pathological processes are increased in the visual system during *** present review will focus on recent findings of the contribution of oxidative stress derived from neuroinflammation in the early neurodegenerative aspects of the diabetic visual system and their relationship with galectin-3.

关键词： diabetes diabetic retinopathy galectin-3 neurodegeneration neuroinflammation optic nerve oxidative stress retina

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