Search results for "Células"

showing 10 items of 93 documents

Pharmacological activation of CB2 receptors counteracts the deleterious effect of ethanol on cell proliferation in the main neurogenic zones of the a…

2015

Chronic alcohol exposure reduces endocannabinoid activity and disrupts adult neurogenesis in rodents, which results in structural and functional alterations. Cannabinoid receptor agonists promote adult neural progenitor cell (NPC) proliferation. We evaluated the protective effects of the selective CB1 receptor agonist ACEA, the selective CB2 receptor agonist JWH133 and the fatty-acid amide-hydrolase (FAAH) inhibitor URB597, which enhances endocannabinoid receptor activity, on NPC proliferation in rats with forced consumption of ethanol (10%) or sucrose liquid diets for 2 weeks. We performed immunohistochemical and stereological analyses of cells expressing the mitotic phosphorylation of his…

:Phenomena and Processes::Physiological Phenomena::Physiological Processes::Growth and Development::Morphogenesis::Embryonic and Fetal Development::Organogenesis::Neurogenesis [Medical Subject Headings]CB1 receptorTubulina (proteína)Cannabinoid receptorCarbamatosEtanol:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Nuclear Proteins::Histones [Medical Subject Headings]Ventrículos lateralesSacarosaNeuronasSubgranular zone0302 clinical medicine:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Membrane Proteins::Receptors Cell Surface::Receptors G-Protein-Coupled::Receptors Cannabinoid::Receptor Cannabinoid CB1 [Medical Subject Headings]Histonas:Chemicals and Drugs::Organic Chemicals::Carboxylic Acids::Acids Acyclic::Carbamates [Medical Subject Headings]Receptor cannabinoide CB1Cannabinoid receptor type 2:Organisms::Eukaryota::Animals [Medical Subject Headings]:Phenomena and Processes::Metabolic Phenomena::Metabolism::Phosphorylation [Medical Subject Headings]:Anatomy::Cells::Stem Cells::Neural Stem Cells [Medical Subject Headings]:Anatomy::Nervous System::Neurons [Medical Subject Headings]health care economics and organizations:Anatomy::Nervous System::Central Nervous System::Brain::Cerebral Ventricles::Lateral Ventricles [Medical Subject Headings]Original Research:Chemicals and Drugs::Nucleic Acids Nucleotides and Nucleosides::Nucleosides::Deoxyribonucleosides::Deoxyuridine::Bromodeoxyuridine [Medical Subject Headings]0303 health sciencesAlcoholismoalcoholConsumo de alcoholNeurogenesis:Phenomena and Processes::Genetic Phenomena::Phenotype::Genetic Markers [Medical Subject Headings]:Chemicals and Drugs::Chemical Actions and Uses::Pharmacologic Actions::Molecular Mechanisms of Pharmacological Action::Neurotransmitter Agents::Cannabinoid Receptor Modulators::Cannabinoid Receptor Agonists [Medical Subject Headings]Benzamidas:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Membrane Proteins::Receptors Cell Surface::Receptors G-Protein-Coupled::Receptors Cannabinoid::Receptor Cannabinoid CB2 [Medical Subject Headings]Endocannabinoid system3. Good healthbromodesoxiuridinaneurogenesisEndocannabinoidesmedicine.anatomical_structure:Chemicals and Drugs::Enzymes and Coenzymes::Enzymes::Hydrolases [Medical Subject Headings]ACEADietaAlcoholFosforilaciónAgonistmedicine.medical_specialtyHidrolasasmedicine.drug_classNeurogenesiseducation:Psychiatry and Psychology::Mental Disorders::Substance-Related Disorders::Alcohol-Related Disorders::Alcoholism [Medical Subject Headings]Subventricular zoneBiology:Phenomena and Processes::Physiological Phenomena::Nutritional Physiological Phenomena::Diet [Medical Subject Headings]:Anatomy::Nervous System::Central Nervous System::Brain::Prosencephalon::Telencephalon::Cerebrum::Cerebral Cortex::Hippocampus::Dentate Gyrus [Medical Subject Headings]lcsh:RC321-57103 medical and health sciencesCellular and Molecular NeuroscienceRatasInternal medicine:Chemicals and Drugs::Amino Acids Peptides and Proteins::Proteins::Nerve Tissue Proteins::Tubulin [Medical Subject Headings]JWH133medicineGiro dentadolcsh:Neurosciences. Biological psychiatry. Neuropsychiatry030304 developmental biologyCélulas madre nerviosas:Chemicals and Drugs::Chemical Actions and Uses::Pharmacologic Actions::Molecular Mechanisms of Pharmacological Action::Neurotransmitter Agents::Endocannabinoids [Medical Subject Headings]Dentate gyrusmarcadores genéticosCB2 receptor:Chemicals and Drugs::Carbohydrates::Polysaccharides::Oligosaccharides::Disaccharides::Sucrose [Medical Subject Headings]:Anatomy::Nervous System::Central Nervous System::Brain::Prosencephalon::Diencephalon::Hypothalamus [Medical Subject Headings]:Chemicals and Drugs::Organic Chemicals::Alcohols::Ethanol [Medical Subject Headings]Endocrinology:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Rodentia::Muridae::Murinae::Rats [Medical Subject Headings]nervous system:Psychiatry and Psychology::Behavior and Behavior Mechanisms::Behavior::Drinking Behavior::Alcohol Drinking [Medical Subject Headings]:Chemicals and Drugs::Organic Chemicals::Amides::Benzamides [Medical Subject Headings]030217 neurology & neurosurgeryHipotálamoNeuroscience
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Granular cell tumor: report of 8 intraoral cases.

2006

El Tumor de células granulares es una neoplasia de origen controvertido que puede aparecer en múltiples localizaciones corporales, incluyendo la región orofacial. El comportamiento de este infrecuente tumor es benigno en la mayor parte de los casos, aunque en ocasiones puede presentar agresividad local e incluso malignidad con afectación a distancia. Su etiología es actualmente solo parcialmente conocida y ha generado controversia desde sus primeras descripciones teorizando sobre un origen muscular, conectivo, etc o neural. En este trabajo se presentan 8 casos clínicos con localización intraoral, correspondientes a 5 mujeres y 3 hombres, con una edad media de 36,1 años y en los que la local…

AbrikossoffGranular cell tumorUNESCO::CIENCIAS MÉDICASneoplasia oraloral neoplasm:CIENCIAS MÉDICAS [UNESCO]Tumor de células granularesSchwann cellcélula de Schwann
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Adenoma de células basales de glándula parótida: Caso clínico y revisión de la literatura

2006

El adenoma de células basales de las glándulas salivares es un tipo de adenoma monomorfo de aparición infrecuente. La localización más habitual es la superficie de la glándula parótida. Suele debutar clínicamente como una masa firme y desplazable de crecimiento lento. Histológicamente se observan células isomórficas formando nidos y trabéculas interanastomosadas, con una membrana basal prominente, separadas por un estroma laxo e hialino y ausencia de estroma mixoide o condroide. A diferencia del adenoma pleomorfo, tiende a la multicentricidad y su tasa de recurrencia después de la extirpación quirúrgica es alta. Debido a sus implicaciones pronósticas, el diagnóstico diferencial con el adeno…

Adenoma de células basalesstomatognathic diseasesBasal cell adenomastomatognathic systemparotidUNESCO::CIENCIAS MÉDICASsalivary gland:CIENCIAS MÉDICAS [UNESCO]parótidaglándula salivar
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Myoepithelial cells are the main component in pleomorphic adenomas?

2007

Objective: The aim of this study was to quantify by immunohistochemistry the number of myoepithelial cells (MyECs) in pleomorphic adenomas (PAs). Material and methods: We retrieved the paraffin cubes of 27 PAs, new slides were done and they were stained with anti-S100 protein antibody. The amount of S-100 protein positive cells was quantified, their morphology was recorded and comparison among MyEC number with age, gender and involved gland were also done. Results: With S-100 protein, MyECs in normal salivary gland tissue were seen surrounding the ductual structures only. In the analysed PAs a mean of 27.4% of the neoplastic cells were positive to the antibody. With the exception of one PA,…

Adenoma pleomorfoUNESCO::CIENCIAS MÉDICASsalivary gland tumorscélulas mioepitelialestumores de glándulas salivales:CIENCIAS MÉDICAS [UNESCO]proteína S-100Pleomorphic adenomasmyoepithelial cellsS-100 protein
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Lentes de contato corneoesclerais adaptadas em córneas irregulares após cirurgia LASIK

2018

ABSTRACT Purpose: We aimed to describe the outcomes of corneoscleral contact lens fitting with multi-aspherical geometry designs in patients with irregular corneas after laser-assisted in situ keratomileusis (LASIK). Methods: This was a retrospective series of 18 patients (age, 26-38 years) selected from an eye clinic database. Participants were required to have unsatisfactory visual acuity with their current contact lenses or spectacles after LASIK for myopia correction. All patients were fitted with corneoscleral contact lenses designed to correct corneal surface irregularities. A diagnostic trial set was used for fitting, and assessments were performed according to a standardized methodo…

AdultCorneal surgery laserIntraocular pressuremedicine.medical_specialtyCorneal Wavefront AberrationVisual acuityPaquimetria corneanagenetic structuresIntraocular pressuremedicine.medical_treatmentKeratomileusis Laser In SituVisual AcuityLentes de contatoKeratomileusisCorneal endothelial cell losslaw.invention03 medical and health sciencesCorneal pachymetry0302 clinical medicinePerda de células endoteliais da córneaPressão intraocularlcsh:OphthalmologylawOphthalmologyMyopiaHumansMedicineContact lensesCorneal pachymetryCirurgia da córnea a laserRetrospective Studiesmedicine.diagnostic_testbusiness.industryCorneal TopographyLASIKGeneral MedicineContact Lenses HydrophilicCorneal topographyeye diseasesLens (optics)Contact lensOphthalmologylcsh:RE1-994030221 ophthalmology & optometrysense organsmedicine.symptombusiness030217 neurology & neurosurgeryFollow-Up Studies
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Citocentrifugación como un método adicional para estudiar celomitos de equinodermos: un enfoque comparativo que combina células vivas, preparaciones …

2021

Abstract Introduction: Echinoderm coelomocytes have traditionally been investigated through a morphological approach using light microscopy, which relies on the idea of constant cell shape as a stable character. However, this can be affected by biotic or abiotic conditions. Objective: To analyze if the consistency in cell morphology offered by the cytocentrifugation method, might be used as a convenient tool to study echinoderm coelomocytes. Methods: Cells of Echinaster (Othilia) brasiliensis (Asteroidea), Holothuria (Holothuria) tubulosa (Holothuroidea), Eucidaris tribuloides, Arbacia lixula, Lytechinus variegatus, and Echinometra lucunter (Echinoidea) were spread on microscope slides by c…

Comparative cell morphologyenergy-dispersive x-ray spectroscopyinmunología de invertebradosinvertebrate immunologyEnergy-dispersive x-ray spectroscopycomparative cell morphologyvibratile cellscélulas vibrátilesMicroscopyFluorescence microscopecomparative cell morphology; echinoderm physiology; energy-dispersive x-ray spectroscopy; invertebrate immunology; spherulocytes; vibratile cells.morfología celular comparativa; fisiología de equinodermos; espectroscopía de rayos-x de energía dispersiva; inmunología de invertebrados; esferulocitos; células vibrátiles.Arbacia lixulaesferulocitosLytechinus variegatusVibratile cellsespectroscopía de rayos-x de energía dispersivamorfología celular comparativabiologyechinoderm physiologyChemistryEchinoderm physiologyEchinometra lucunterbiology.organism_classificationspherulocytesSpherulocytesfisiología de equinodermosEchinodermBiochemistryEucidaris tribuloidesInvertebrate immunologyGeneral Agricultural and Biological SciencesHolothuriaRevista de Biología Tropical
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Inducción de la meiosis en células germinales obtenidas in vitro a partir de células madre pluripotentes humanas mediante expresión ectópica de las p…

2012

Entre las diversas afecciones que pueden causar infertilidad, la baja calidad gamética juega un importante papel. El estudio del desarrollo de la línea germinal es, por tanto, necesario para comprender las causas de la mala calidad gamética y así ayudar a mejorarla. Sin embargo, nuestro conocimiento actual acerca del desarrollo de la línea germinal in vivo en humanos es limitado, debido en gran parte a las limitaciones éticas y técnicas para obtener embriones humanos en estadíos tempranos del desarrollo. En este sentido, las células madre embrionarias humanas (hESCs, del inglés human Embryonic Stem Cells) y las células madre de pluripotencia inducida (iPSCs, del inglés induced Pluripotent S…

Células germinalesMeiosisCélulas madreUNESCO::CIENCIAS MÉDICASVASADAZL:CIENCIAS MÉDICAS [UNESCO]
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¿Por qué proliferan las células?

2007

franco@uv.es

Células:CIENCIAS DE LA VIDA::Biología celular [UNESCO]Ciclo celularProlifieración y divisiónCélulas; Prolifieración y división; Ciclo celularUNESCO::CIENCIAS DE LA VIDA::Biología celular
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Utilidad de Bcl-2 como nuevo marcador de expresión de células basales en patología prostática

2006

Resumen Introduccion y objetivos El diagnostico de adenocarcinoma invasor de prostata es con frecuencia dificil en biopsias cilindricas, siendo fundamental en estos casos la determinacion de la presencia de celulas basales. en la actualidad, la expresion inmunohistoquimica del antigeno 34betae12 junto con la proteina p63 son los marcadores mas utilizados. en nuestro estudio, se analizo comparativamente la expresion de 34betae12, p63, bcl-2 y alfa-metilacil-coa racemasa para valorar la utilidad de bcl-2 como nuevo marcador de celulas basales en patologia prostatica. Metodos y resultados El estudio incluia piezas de prostatectomia de 48 pacientes en los que se analizo la ausencia de marcaje i…

Gynecologymedicine.medical_specialtybusiness.industryCáncer próstataUrologymedicineBcl-2businessCélulas basalesInmunohistoquímicaActas Urológicas Españolas
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TLR4 expression in ex-Lichenoid lesions—oral squamous cell carcinomas and its surrounding epithelium: the role of tumor inflammatory microenvironment

2022

Toll-like receptors (TLRs) regulate innate and adaptive immune responses. Moreover, TLRs can induce a pro-survival and pro-proliferation response in tumor cells. This study aims to investigate the expression of TLR4 in the epithelium surrounding oral squamous cell carcinomas (OSCC) in relation to its inflammatory microenvironment. This study included 150 human samples: 30 normal oral control (NOC), 38 non-lichenoid epithelium surrounding OSCC (NLE-OSCC), 28 lichenoid epithelium surrounding OSCC (LE-OSCC), 30 OSCC ex-non oral lichenoid lesion (OSCC Ex-NOLL), and 24 OSCC ex-oral lichenoid lesion (OSCC Ex-OLL). TLR4 expression was investigated by immunohistochemistry and the percentage of posi…

InflammationSquamous Cell Carcinoma of Head and NeckNeoplasias bucaisBiochemistryReceptor 4 toll-likeEpitheliumToll-like receptorsToll-Like Receptor 4stomatognathic diseasestoll-like receptorsTumor microenvironmentinflammationMicroambiente tumoralHumanstoll-like receptortumor microenvironmentMouth Neoplasmshead and neck cancerTLR4Carcinoma de células escamosas de cabeça e pescoçohead and neck cancer; tumor microenvironment; inflammation; toll-like receptors; TLR4Head and neck cancerMolecular Biology
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