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Impact of STAT-signaling pathway on cancer-associated fibroblasts in colorectal cancer and its role in immunosuppression

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 1705-1724页

作者： Damián Sánchez-Ramírez Mónica G Mendoza-Rodríguez Omar R Alemán Fernando A Candanedo-González Miriam Rodríguez-Sosa Juan JoséMontesinos-Montesinos Mauricio salcedo Ismael Brito-Toledo Felipe Vaca-Paniagua Luis I Terrazas Unidad de Investigacion en Biomedicina Facultad de Estudios Superiores IztacalaUniversidad Nacional Autonoma de MexicoTlalnepantla 54090Estado de MexicoMexico department of Biology Facultad de QuimicaUniversidad Nacional Autonoma de MexicoCiudad UniversitariaMexico City 04510Mexico department of Pathology National Medical Center Century XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Laboratorio de Células Troncales Mesenquimales Unidad de Investigación Médica en Enfermedades OncológicasHospital de Oncología Centro Medico Nacional Siglo XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Unidad de Investigacion en Biomedicina y Oncologia Genomica Instituto Mexciano del Seguro SocialMexico City 07300Mexico Servicio de Colon y Recto Hospital de Oncología Centro Medico Nacional Siglo XXIInstituto Mexicano del Seguro SocialMexico City 06720Mexico Laboratorio nacional en salud Facultad de Estudios Superiores IztacalaUniversidad Nacional Autónoma de MéxicoTlalnepantla 54090Estado de MexicoMexico

Colorectal cancer(CRC)remains one of the most commonly diagnosed and deadliest types of cancer *** displays a desmoplastic reaction(dr)that has been inversely associated with poor prognosis;less dr is associated with a better *** reaction generates excessive connective tissue,in which cancer-associated fibroblasts(CAFs)are critical cells that form a part of the tumor *** are directly involved in tumorigenesis through different ***,their role in immunosuppression in CRC is not well understood,and the precise role of signal transducers and activators of transcription(STATs)in mediating CAF activity in CRC remains *** the myriad chemical and biological factors that affect CAFs,different cytokines mediate their function by activating STAT signaling ***,the harmful effects of CAFs in favoring tumor growth and invasion may be modulated using STAT ***,we analyze the impact of different STATs on CAF activity and their immunoregulatory role.

关键词： Cancer-associated fibroblasts Signal transducer and activator of transcription signaling Colorectal cancer Immunity Immunosuppression

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Quercetin prevents spinal motor neuron degeneration induced by chronic excitotoxic stimulus by a sirtuin 1-dependent mechanism

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Translational Neurodegeneration 2017年第1期6卷 310-323页

作者： Rafael Lazo-Gomez ricardo Tapia División de Neurociencias Instituto de Fisiología CelularUniversidad Nacional Autónoma de MéxicoCircuito exterior s/nCiudad UniversitariaCoyoacán04510 Ciudad de MéxicoMexico

Background:Excitotoxicity is a mechanism of foremost importance in the selective motor neuron degeneration characteristic of motor neuron *** therapeutic strategies are an unmet need for these ***,such as quercetin and resveratrol,are plant-derived compounds that activate sirtuins(SIRTs)and have shown promising results in some models of neuronal death,although their effects have been scarcely tested in models of motor neuron ***:In this work we investigated the effects of quercetin and resveratrol in an in vivo model of excitotoxic motor neuron death induced by the chronic infusion ofα-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid(AMPA)into the rat spinal cord *** and resveratrol were co-infused with AMPA and motor behavior and muscle strength were assessed daily for up to ten ***,animals were fixed and lumbar spinal cord tissue was analyzed by histological and immunocytological ***:We found that the chronic infusion of AMPA[1 mM]caused a progressive motor neuron degeneration,accompanied by astrogliosis and microgliosis,and motor deficits and paralysis of the rear *** infusion ameliorated AMPA-induced paralysis,rescued motor neurons,and prevented both astrogliosis and microgliosis,and these protective effects were prevented by EX527,a very selective SIRT1 *** contrast,neither resveratrol nor EX527 alone improved motor behavior deficits or reduced motor neuron degeneration,albeit both reduced ***:These results suggest that quercetin exerts its beneficial effects through a SIRT1-mediated mechanism,and thus SIRT1 plays an important role in excitotoxic neurodegeneration and therefore its pharmacological modulation might provide opportunities for therapy in motor neuron disorders.

关键词： Motor neuron disorder Quercetin Resveratrol Sirtuin Excitotoxicity

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Reversing gastric mucosal alterations during ethanol-induced chronic gastritis in rats by oral administration of Opuntia ficus-indica mucilage

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World Journal of Gastroenterology 2006年第27期12卷 4318-4324页

作者： ricardo Vázquez-Ramírez Marisela Olguín-Martínez Carlos Kubli-Garfias Rolando Hernández-Mu■oz depto.de Biología Celular y Fisiología Instituto de Investigaciones Biomédicas. Universidad Nacional Autónoma de México. Apdo. Postal 70-243México D.F. 04510Mexico depto.de Biología Celular Instituto de Fisiología Celular. Universidad Nacional Autónoma de México. Apdo. Postal 70-243México D.F. 04510Mxico depto. de Biología Celular Institute de Fisiología Celular. Universidad Nacional Autónoma de México. Apdo. Postal 70-243México D.F. 04510Mxico

AIM： To study the effect of mucilage obtained from cladodes of Opuntia ficus-indica （Cactaceae） on the healing of ethanol-induced gastritis in rats. METHODS： Chronic gastric mucosa injury was treated with mucilage （5 mg/kg per day） after it was induced by ethanol. Lipid composition, activity of 5＇-nucleotidase （a membrane-associated ectoenzyme） and cytosolic activities of lactate and alcohol dehydrogenases in the plasma membrane of gastric mucosa were determined. Histological studies of gastric samples from the experimental groups were included. RESULTS： Ethanol elicited the histological profile of gastritis characterized by loss of the surface epithelium and infiltration of polymorphonuclear leukocytes. Phosphatidylcholine （PC） decreased and cholesterol content increased in plasma membranes of the gastric mucosa. In addition, cytosolic activity increased while the activity of alcohol dehydrogenases decreased. The administration of mucilage promptly corrected these enzymatic changes. In fact, mucilage readily accelerated restoration of the ethanol-induced histological alterations and the disturbances in plasma membranes of gastric mucosa, showing a univocal anti-inflammatory effect. The activity of 5＇-nucleotidase correlated with the changes in lipid composition and the fluidity of gastric mucosal plasma membranes. CONCLUSION： The beneficial action of mucilage seems correlated with stabilization of plasma membranes of damaged gastric mucosa. Molecular interactions between mucilage monosaccharides and membrane phospholipids, mainly PC and phosphatidylethanolamine （PE）, may be the relevant features responsible for changing activities of membrane-attached proteins during the healing process after chronic gastric mucosal damage.

关键词： Gastritis Mucilage Chronic gastric mucosal injury Ethanol

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Spatial analysis of dengue through the reproduction numbers relating to socioeconomic features:Case studies on two Brazilian urban centers

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Infectious Disease Modelling 2024年第1期9卷 142-157页

作者： Ana T.C.Silva Rejane C.Dorn Lívia R.Tomás Leonardo B.L.santos Lacita M.Skalinski Suani T.R.Pinho departamento de Física Universidade Estadual de Feira de SantanaAv.Transnordestinas/n.Novo HorizonteFeira de Santana44036-900BABrazil instituto de Física Universidade Federal da BahiaRua Barão de Jeremoabo s/nCampus Universitário de OndinaSalvador40170-115BABrazil Centro nacional de Monitoramento e Alertas de desastres Naturais(CEMAdeN) Estrada Dr.Altino Bondensan500São Josédos Campos12247-016SPBrazil Universidade Estadual de santa Cruz Campus Soane Nazaréde AndradeRodovia Jorge AmadoKm 16SalobrinhoIlhéus45662-900BABrazil instituto de saúde Coletiva Universidade Federal da BahiaR.Basílio da Gamas/n-CanelaSalvador40110-140BABrazil instituto nacional de Ciência e Tecnologia-Sistemas Complexos Virtual InstitutionBrazil

The study of the propagation of infectious diseases in urban centers finds a close connection with their population's social characteristics and *** work performs a spatial analysis of dengue cases in urban centers based on the basic reproduction numbers,R0,and incidence by planning areas(PAs),as well as their correlations with the Human development Index(HDI)and the number of *** analyzed dengue epidemics in 2002 at two Brazilian urban centers,Belo Horizonte(BH)and Rio de Janeiro(RJ),using PAs as spatial *** results reveal heterogeneous spatial scenarios for both cities,with very weak correlations between R0 and both the number of trips and the HDI;in BH,the values of R0 show a less spatial heterogeneous pattern than in *** BH,there are moderate correlations between incidence and both the number of trips and the HDI;meanwhile,they weakly correlate for ***,the absence of strong correlations between the considered measures indicates that the transmission process should be treated considering the city as a whole.

关键词： dengue Mathematical mode lBasic reproduction number Urban mobility Urban indices

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Microglia depletion as a therapeutic strategy:friend or foe in multiple sclerosis models?

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Neural Regeneration Research 2023年第2期18卷 267-272页

作者： Victoria Sofia Berenice Wies Mancini Anabella Ayelen Di Pietro Laura Andrea Pasquini Universidad de Buenos Aires Facultad de Farmacia y BioquímicaDepartamento de Química BiológicaCátedra de Química Biológica PatológicaBuenos AiresArgentina Universidad de Buenos Aires Consejo Nacional de Investigaciones Científicas y TécnicasInstituto de Química y Fisicoquímica Biológicas Prof.Dr.Alejandro C.PaladiniFacultad de Farmacia y BioquímicaBuenos AiresArgentina

M ultiple sclerosis is a chro nic central nervous system demyelinating disease whose onset and progression are driven by a combination of immune dysregulation,genetic predisposition,and environmental fa *** activation of microglia and astrocytes is a key player in multiple sclerosis immunopathology,playing specific roles associated with anatomical location and phase of the disease and controlling demyelination and *** though reactive mic roglia can damage tissue and heighten deleterious effects and neurodegeneration,activated microglia also perform neuroprotective functions such as debris phagocytosis and growth fa ctor *** can be activated into pro-inflammato ry phenotype A1 through a mechanism mediated by activated neuroinflammatory microglia,which could also mediate *** A1 phenotype inhibits oligodendrocyte prolife ration and differe ntiation and is toxic to both oligodendrocytes and *** r,astroglial activation into phenotype A2 may also take place in response to neurodegeneration and as a protective mechanism.A variety of animal models mimicking specific multiple sclerosis features and the associated pathophysiological processes have helped establish the cascades of events that lead to the initiation,progression,and resolution of the *** colonystimulating facto r-1 receptor is expressed by myeloid lineage cells such as peripheral monocytes and macrophages and central nervous system ***,as microglia development and survival critically rely on colony-stimulating factor-1 receptor signaling,colony-stimulating factor-1 receptor inhibition can almost completely eliminate microglia from the *** this context,the present review discusses the impact of microglial depletion through colo ny-stimulating factor-1 receptor inhibition on demyelination,neurodegeneration,astroglial activation,and behavior in different multiple sclerosis models,highlighting the diversity of micr

关键词： astrocytes colony-stimulating factor-1 receptor inhibition cuprizone demyelnation microglia multiple sclerosis neurodegeneration

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Geochemistry and mineralogy of beach sediments in the northern Gulf of Mexico,Tamaulipas state,Mexico:implication for provenance

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Journal of Palaeogeography 2024年第3期13卷 375-400页

作者： Mayank Shukla sanjeet K.Verma Mayla A.Ramos-Vázquez John S.Armstrong-Altrin Karla R.Hernández-Martínez Sumit Mishra Vivek P.Malviya Héctor Hernández-Mendoza Posgrado de la Division de Geociencias Aplicadas Instituto Potosino de Investigacion Científica y Tecnologica(IPICYT)Camino a la Presa San José2055San Luis Potosí78216Mexico Division de Geociencias Aplicadas Instituto Potosino de Investigación Científica y Tecnologica(IPICYT)Camino a la Presa San Jose 2055San Luis Potosí78216Mexico Universidad nacional Autonoma de México Instituto de Ciencias del Mar y LimnologíaUnidad de ProcesosOceanicos y CosterosCiudad UniversitariaCiudad de México 04510Mexico department of Marine Sciences Bharathidasan UniversityTiruchirappalli620024Tamil NaduIndia instituto de Geociencias Universidad Nacional Autonoma de MéxicoBoulevard Juriquilla 300176230JuriquillaQueretaroMexico department of Applied Geology Dr.Harisingh Gour Central UniversitySagar470002Madhya PradeshIndia instituto de Investigacion de Zonas desérticas Universidad Autònoma de San Luis PotosíAltair 200CP 78377San LuisS.L.P.Mexico Universidad del Centro de Mexico Capitán Caldera 75CP 78250San LuisS.L.P.Mexico

Geochemical and mineralogical studies were performed in the La Pesca(LP)and Tesoro Altamira(TA)beach sediments,located in the Tamaulipas state,northern Gulf of *** main aim of this study is to infer the weathering history and provenance and to discriminate the tectonic environment of the beach *** sediments are composed of quartz with small amounts of accessory minerals such as plagioclase,calcite,orthoclase,microcline,and *** beach sediments are classified as fine-grained and very well sorted,however LP has coarse skewed and leptokurtic sediments,whereas TA has fine-skewed and very leptokurtic *** chemical index of weathering(CIW’)indicates intense weathering in the source *** quartz grain microtextures in the LP and TA are classified into mechanical,chemical,and mechanical/chemical *** features such as fractures,pits,percussion marks,abrasion fatigue,and V-shaped marks favor high-energy littoral,fluvial,subaqueous-marine,and aeolian *** chemical features indicate solution pits and crystalline overgrowth,which suggests a silica saturated marine *** mechanical/chemical features display adhering particles and elongated depressions suggest formation in a sub-aqueous nearshore marine *** and trace elements-based provenance discrimination diagrams indicate a felsic source derived from the Mesa Central(MC),Sierra Madre Oriental(SMOr)and Oaxaquia *** major and trace element concentrations imply a passive margin setting for the northern Gulf of Mexico,which is consistent with the general geology.

关键词： Beach sediments Geochemistry Mineralogy Provenance Tamaulipas Tectonic setting

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sap flow rates of Minquartia guianensis in central Amazonia during the prolonged dry season of 2015–2016

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Journal of Forestry Research 2021年第5期32卷 2067-2076页

作者： saul A.Antezana-Vera ricardo A.Marenco Botany Graduate Program Instituto Nacional de Pesquisas da Amazônia-INPAAvenida AndréAraújo2936ManausAM 69067-375Brazil Tree Ecophysiology LaboratoryInstituto Nacional de Pesquisas da Amazônia-INPAAvenida AndréAraújo2936ManausAM 69067-375Brazil

Minquartia guianensis *** a slow-growing species with several *** the juvenile state,it is well-adapted to low light conditions of the forest ***,it is still unknown how climate variability affects transpiration of this species,particularly under drought *** this study,we aimed to assess the effect of climatic variability on sap flow rates(SFR).SFR and radial growth were measured in six trees(14-50 cm diameter)in 2015 and ***(precipitation,irradiance,relative humidity and temperature)and soil water content(SWC)data were also *** tended to increase in the dry season,with a negative relationship between SFR and SWC and precipitation(pdeficit were the most important factors at night(pded at night,the mean nocturnal sap flow was positive and across trees the nighttime sap flow accounted for 12.5%of the total daily sap *** transpiration during the dry season suggests that the root system of Minquartia was able to extract water from deep soil *** results widen our understanding of the ecophysiology of Amazonian trees under drought and provide further insight into the potential effect of the forecasted decline in precipitation in the Amazon region.

关键词： Reverse sap flow Soil water content Transpiration Tree growth

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Comparative analysis of two nonlethal methods for the study of the gut bacterial communities in wild lizards

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Integrative Zoology 2023年第6期18卷 1056-1071页

作者： Mauricio HERNÁNdeZ Sergio ANCONA Stephanie HEREIRA-PACHECO Aníbal HDÍAZ de LA VEGA-PÉREZ Yendi E.NAVARRO-NOYA Doctorado en Ciencias Biológicas Centro de Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico departamento de Ecología Evolutiva Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoMexico CityMexico Estación Científica la Malinche Centro de Tlaxcala de Biología de la ConductaUniversidad Autónoma de TlaxcalaTlaxcalaMexico Consejo nacional de Ciencia y Tecnología—Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de TlaxcalaTlaxcalaMexico Laboratorio de Interacciones Bióticas Centro de Investigación en Ciencias BiológicasUniversidad Autónoma de TlaxcalaTlaxcalaMexico

Fecal samples or cloacal swabs are preferred over lethal dissections to study vertebrate gut microbiota for ethical reasons,but it remains unclear which nonlethal methods provide more accurate information about gut *** compared the bacterial communities of three gastrointestinal tract(GIT)segments,that is,stomach,small intestine(midgut),and rectum(hindgut)with the bacterial communities of the cloaca and feces in the mesquite lizard Sceloporus *** hindgut had the highest taxonomic and functional alpha diversity,followed by midgut and feces,whereas the stomach and cloaca showed the lowest *** taxonomic assemblages of the GIT segments at the phylum level were strongly correlated with those retrieved from feces and cloacal swabs(rs>0.84 in all cases).The turnover ratio of Amplicon Sequence Variants(ASVs)between midgut and hindgut and the feces was lower than the ratio between these segments and the *** than half of the core-ASVs in the midgut(24 of 32)and hindgut(58 of 97)were also found in feces,while less than 5 were found in the *** the ASVs level,however,the structure of the bacterial communities of the midgut and hindgut were similar to those detected in feces and *** findings suggest that fecal samples and cloacal swabs of spiny lizards provide a good approximation of the taxonomic assemblages and beta diversity of midgut and hindgut microbiota,while feces better represent the bacterial communities of the intestinal segments at a single nucleotide variation level than cloacal swabs.

关键词： animal microbiome cloacal swabs fecal samples intestinal tract reptile gut microbiome

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Historical relationships of areas of endemism of the Brazilian Atlantic rain forest： a cladistic biogeographic analysis of harvestman taxa （Arachnida： Opiliones）

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Current Zoology 2017年第5期63卷 525-535页

作者： Marcio B. DASILVA ricardo PINTO-DA-ROCHA Juan J. MORRONE departamento de Sistematica e Ecologia CCEN Universidade Federal da Paraiba Cidade Universitaria Joao Pessoa PB Brazil departamento de Zoologia Instituto de Biociencias Universidade de Sao Paulo Sao Paulo SP Brazil Museo de Zoologia "Alfonso L. Herrera" Departamento de Biologia Evolutiva Facultad de Ciencias Universidad Nacional Autdnoma de Mexice (UNAM) 04510 Mexico City Mexico

Based on a cladistic biogeographic analysis of 6 species-level phylogenies of harvestman taxa, wesearched for congruence in the historical relationships of 12 areas of endemism of the BrazilianAtlantic Rain Forest. We constructed general area cladograms using Primary Brooks ParsimonyAnaJysis （BPA）, BPA of nodes, and paralogy-free subtree analysis. These analyses resulted in 6general area cladograms, that allow to infer a general pattern of the relationships among areas ofendemism from the Brazilian Atlantic Rain Forest. Northern areas resulted related basally showingmain disjunctions at the Doce River Valley and Todos os santos Bay/S^o Francisco River *** remaining areas of endemism were included in a southern and a southeastern block, sepa-rated by the Ribeira do Iguape Valley. Incongruence Length Differences tests showed no significantincongruence among the resulting cladograms and other matrix partitions. We concluded that tec-tonism and ancient marine transgressions were the probable processes responsible for the maindisjunctions, whereas Neogene refugia seem to have caused the more recent disjunctions. Thegeneral pattern and redundancy in area relationships suggest a model of main reiterative barriersin diversification at multiple times for the evolution of the Atlantic Rain Forest. The renewal of cla-distic biogeography and the search for common biogeographic patterns are discussed.

关键词： dispersal, historical biogeography, Mata Atlantica, speciation, vicariance.

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Diagnosis and management of brain metastases:an updated review from a radiation oncology perspective

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Journal of Cancer Metastasis and Treatment 2019年第7期4卷 12-27页

作者： Gutiérrez-Valencia Enrique Sánchez-Rodríguez Irving Balderrama-Ibarra ricardo Fuentes-LaraJesús Rios-Martínez Alan Vázquez Aldana Arroyo Iñigo Bayardo-López Luis Hernández ChávezAllan Puebla-Mora Ana Graciela Nader-Roa Liliana Espíritu-Rodríguez Roque instituto Mexicano del Seguro Social(IMSS) Departamento de Radio-OncologíaCentro Médico Nacional de OccidenteUniversidad de GuadalajaraGuadalajara 44340México instituto Mexicano del Seguro Social(IMSS) Departamento de Anatomía PatológicaCentro Médico Nacional de OccidenteUniversidad de GuadalajaraGuadalajara 44340México instituto Mexicano del Seguro Social(IMSS) Departamento de Física MédicaCentro Médico Nacional de OccidenteGuadalajara 44340México

Brain metastasis are the most common intracranial malignancy in the adult population. Their incidence has increased dramatically over the last 20 years, as a result of the increasing number of cases stemming from lung and breast cancer together with the higher cancer survival rates due to diagnostic and therapeutic advances. More than 40%of cancer patients develop brain metastases during the course of their disease: specifically, they appear in 50%of patients with lung cancer, more than 25% of patients with breast cancer, and 20% of patients with melanoma. Diagnosis is made using different imaging approaches, such as computed tomography and magnetic resonance imaging, accompanied by clinical manifestations and a history of malignancy supporting the diagnosis of a brain metastasis. Current treatment options should be oriented to the patient's current performance, the number of intracranial and extracranial lesions, and related factors. Although surgical resection and whole-brain radiotherapy have been standard treatments for many years, numerous treatment modalities have become more easily available and accepted worldwide, producing more favorable and reliable results. Among these is stereotactic radiosurgery, and the latest clinical trials support this treatment.

关键词： Brain metastases whole-brain radiation therapy stereotactic radiosurgery graded prognostic assessment

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