Base de dados : LILACS
Pesquisa : D12.644.276.374.750.562 [Categoria DeCS]
Referências encontradas : 46 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 5 ir para página              

  1 / 46 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1145546
Autor: Chaparro, Alejandra; Sanz, Antonio; Wolnitzky, Andrei; Realini, Ornella; Bendek, María José; Betancur, Daniel; Albers, Daniela; Beltrán, Víctor.
Título: Lymphocyte B and Th17 chemotactic cytokine levels in peri-implant crevicular fluid of patients with healthy, peri-mucositis, and peri-implantitis implants / Niveles de citoquinas quimiotácticas de linfocitos B y Th17 en el fluido crevicular periimplantario de pacientes con implantes sanos, perimucositis y periimplantitis
Fonte: J. oral res. (Impresa);S1 Preecedings:20-25, jul. 1, 2020. graf.
Idioma: en.
Resumo: Peri-implantitis is one of the leading causes of implant failure and loss, and its early diagnosis is not currently feasible due to the low sensitivity of currents methods. In the current exploratory cross-sectional study, we explored the diagnostic potential of lymphocyte B and Th17-chemotactic cytokine levels in peri-implant crevicular fluid (PICF) in 54 patients with healthy, peri-mucositis, or peri-implantitis implants. Peri-implant crevicular fluid was collected, and the levels of the molecules under study were quantified by Luminex assay. The concentrations of CCL-20 MIP-3 alpha, BAFF/BLYS, RANKL and OPG concentration in PICF were analyzed in the context of patient and clinical variables (smoking status, history of periodontitis, periodontal diagnosis, implant survival, suppuration, bleeding on probing, periodontal probing depth, clinical attachment level, mean of implant probing depth, and plaque index). Patients with peri-implantitis, appear to have an overregulation of the RANKL/BAFF-BLyS axis. This phenomenon needs to be investigated in depth in further studies with a larger sample size.

La periimplantitis es una de las principales causas de falla y pérdida del implante, y su diagnóstico temprano no es factible debido a la baja sensibilidad de los métodos actuales. En este estudio transversal exploratorio, se estudió el potencial diagnóstico de los niveles de citocinas quimiotácticas de linfocitos B y Th17 en el líquido crevicular periimplantario (LCPI) en 54 pacientes con implantes sanos, peri-mucositis o periimplantitis. Se recogió líquido crevicular periimplantario y se cuantificaron los niveles de las moléculas estudiadas mediante Luminex assay. Las concentraciones de CCL-20 MIP-3 alfa, BAFF/BLYS, RANKL y la concentración de OPG en LCPI se analizaron en el contexto de las variables clínicas y del paciente (tabaquismo, antecedentes de periodontitis, diagnóstico periodontal, supervivencia del implante, supuración, sangrado al sondaje, profundidad de sondeo periodontal, nivel de inserción clínica, media de la profundidad de sondeo del implante e índice de placa). Los pacientes con periimplantitis parecen tener una sobrerregulación del eje RANKL/BAFF-BLyS. Este fenómeno debe investigarse en profundidad en futuros estudios con un tamaño de muestra mayor.
Descritores: Implantes Dentários/efeitos adversos
Peri-Implantite/diagnóstico
-Biomarcadores
Chile
Estudos Transversais
Líquido do Sulco Gengival
Mucosite
Ligante RANK
Quimiocina CCL20
Limites: Humanos
Masculino
Feminino
Adulto
Pessoa de Meia-Idade
Idoso
Responsável: CL30.1 - Biblioteca


  2 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1150748
Autor: Losoviz, Edith; Ganiewich, Ester; Flores de Suárez, Stella.
Título: Actualidad en ortodoncia: las micro-osteoperforaciones en la aceleración del tratamiento ortodóncico / An update in orthodontics: micro-osteoperforations for accelerating orthodontic treatment
Fonte: Rev. Ateneo Argent. Odontol;63(2):39-54, nov. 2020. ilus.
Idioma: es.
Resumo: La búsqueda por encontrar métodos para acortar la duración de los tratamientos de ortodoncia tiene un pasado reciente, un presente y un futuro. Las fuerzas ortodóncicas que se ejercen sobre la membrana periodontal producen movimientos dentarios por modificaciones histológicas y biomoleculares. El conocimiento de los procesos biológicos da lugar a implementar cambios para favorecer la aceleración de los procesos resortivos y neoformativos. El objetivo de esta publicación es hacer una breve síntesis de lo acontecido con este tema y exponer el procedimiento de las micro-osteoperforaciones (MOPs) como una opción complementaria al tratamiento de ortodoncia convencional. Aún no existe suficiente apoyo de ensayos clínicos en humanos para aseverar su éxito. Más aún, distintos autores publican conclusiones contradictorias. Es de esperar que, en breve, nuevas investigaciones contribuyan a respaldarlo o desestimarlo (AU)

The quest to find methods to shorten the duration of orthodontic treatments has a recent past, a present, and a future. Orthodontic forces exerted on the periodontal membrane produce tooth movements by histological and biomolecular modifications. Knowledge of biological processes results in changes to promote the acceleration of spring and neoformative processes. The objective of this publication is to make a brief synthesis of what happened with this topic and expose the micro-osteoperforations (MOPs) procedure as a complementary option to conventional orthodontic treatment. There is not yet enough support from human clinical trials to assert its success. Moreover, different authors publish conflicting conclusions. It is to be expected that, shortly, further investigations will help to support or dismiss it (AU)
Descritores: Técnicas de Movimentação Dentária/métodos
Fenômenos Biológicos
Procedimentos Cirúrgicos Bucais
Microcirurgia
-Osteotomia/métodos
Reabsorção Óssea/fisiopatologia
Terapia com Luz de Baixa Intensidade
Ligante RANK
Duração da Terapia
Limites: Humanos
Tipo de Publ: Revisão
Responsável: AR29.1 - Biblioteca


  3 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1104226
Autor: Pavlov, Sergey; Babenko, Nataliia; Kumetchko, Marina; Litvinova, Olga; Semko, Natalia; Pavlova, Olga.
Título: Intercellular mediators in bone remodeling regulation in the experimental renal pathology / Mediadores intercelulares de la regulación de la remodelación ósea en un modelo experimental de patología renal
Fonte: Actual. osteol;15(3):180-191, Sept-Dic. 2019. ilus.
Idioma: en.
Resumo: Bone metabolism disorders are characterized by an imbalance of bone resorption and formation in the bone remodeling process. Glucocorticoids that are used to treat kidney diseases exacerbate these disorders. P-selectin and galectin-3 are molecules involved in the sclerotic process in kidney, whereas bone resorption is regulated by the interaction between the nuclear factor activator kappa b receptor (RANK), its ligand (RANKL) and the RANKL decoy receptor osteoprotegerin (OPG). The aim of this study was to investigate the cellular and molecular mechanisms of disruption of bone remodeling regulation processes, reflected by intercellular mediators (RANKL, OPG, P-selectin and galectin-3) in chronic kidney disease experimental model treated with glucocorticoids. Rats were divided into four groups of 10 animals each. The first group, the control group, included intact animals. The second group consisted of rats with impaired bone remodeling resulting from chronic kidney disease (experimental group (CKD). The third group was a group of animals with impaired bone remodeling due to exposure to glucocorticoids (experimental group (GCs)). The fourth group consisted of rats with impaired bone remodeling in chronic kidney disease, followed by exposure to glucocorticoids (experimental group (CKD + GCs)). The effects of CKD and glucocorticoid were evaluated biochemically, histologically and by measuring bone density. An enzymelinked immunoassay was used to measure intercellular mediator levels in the serum. The bone density in the experimental groups was reduced compared to the control group. RANKL levels in animals of three experimental groups were higher than in intact animals. Serum levels of OPG were higher in CKD and GCs groups than in intact animals. At the same time, in the animals' blood serum of the CKD + GCs group, the levels of OPG were lower, than those in animals from the control group. The levels of galectin-3 in the serum of the experimental groups GCs and CKD + GCs were lower than in intact animals. The serum levels of galectin-3 in animals of the CKD group were higher than those in animals from the control group. The levels of P-selectin were lower in the serum of the GCs group than in intact animals. At the same time, the levels of P-selectin were higher in the CKD and CKD + GCs groups, than those in animals from the control group. In conclusion, the study of the complex system of bone remodeling regulation, which includes many factors and their interactions, may lead to the development of new methods for treating patients with chronic kidney disease in order to prevent osteoporosis in the future. (AU)

Las enfermedades metabólicas óseas se caracterizan por un desequilibrio en el proceso de remodelación ósea en los que participan mediadores tales como receptor del activador del factor nuclear- kappa- b (RANK), su ligando (RANKL) y la osteoprotegerina (OPG). Los glucocorticoides, recuentemente empleados en el tratamiento de la enfermedad renal crónica, exacerban este desequilibrio. En la enfermedad esclerótica renal, las moléculas de adhesión celular P-selectina and galectina-3 tienen un rol fundamental. El objetivo de esta trabajo fue estudiar las alteraciones en los mediadores de la remodelación ósea (RANKL, OPG, P-selectina and galectina-3) en un modelo de enfermedad renal crónica con tratamiento glucocorticoideo. Ratas Wistar hembras fueron divididos en 4 grupos: control (C); enfermedad renal crónica con afección de la remodelación ósea (ERC); animales con afección de la remodelación ósea expuestos a glucocorticoides (GC); enfermedad renal crónica con afección de la remodelación ósea tratados con glucocorticoides (ERC+GC). Los efectos de la ERC y los GC fueron evaluados bioquímicamente, histológicamente y por medición de la densidad ósea. RANKL, OPG, Pselectina and galectina-3 se cuantificaron en muestras de sangre venosa empleando enzimoinmuno análisis. En los 3 grupos experimentales la densidad ósea se evidenció reducida y los niveles séricos de RANKL elevados respecto al grupo control. Los niveles de OPG en los grupos ERC y GC fueron superiores mientras que en el grupo ERC+GC menores respecto a los animales controles. Galectina 3 plasmática en GC y ERC+GC se encontró reducida y aumentada en los animales ERC, en comparación con los animales controles. La concentración sérica de P-selectina sérica fue mayor en los grupos ERC y ERC+GC, y menor en los animales GC respecto a los niveles plasmáticos de los animales intactos. El avance del conocimiento sobre la regulación de la remodelación ósea a través de la interacción de mediadores sistémicos, en un futuro, puede conducir al desarrollo de nuevas estrategias terapéuticas para la prevención de la osteoporosis en pacientes con enfermedad renal crónica. (AU)
Descritores: Distúrbio Mineral e Ósseo na Doença Renal Crônica/induzido quimicamente
Remodelação Óssea/efeitos dos fármacos
Nefropatias/fisiopatologia
-Osteoporose/prevenção & controle
Doenças Ósseas Metabólicas/diagnóstico
Dexametasona/administração & dosagem
Densidade Óssea/efeitos dos fármacos
Clorofórmio/uso terapêutico
Ratos Wistar
Selectina-P/efeitos dos fármacos
Selectina-P/sangue
Galectina 3/efeitos dos fármacos
Galectina 3/sangue
Ligante RANK/efeitos dos fármacos
Ligante RANK/sangue
Osteoprotegerina/efeitos dos fármacos
Osteoprotegerina/sangue
Glucocorticoides/efeitos adversos
Glicerol/administração & dosagem
Nefropatias/tratamento farmacológico
Limites: Animais
Ratos
Tipo de Publ: Ensaio Clínico Controlado Aleatório Veterinário
Responsável: AR2.1 - Biblioteca Central


  4 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Marcantonio, Rosemary Adriana Chiérice
Texto completo
Id: biblio-1019974
Autor: Tsurumaki, Jackeline do Nascimento; Paula, Luiz Guilherme Freitas de; Aquino, Sabrina Garcia de; Marcantonio Jr, Elcio; Oliveira, Guilherme José Pimentel Lopes de; Marcantonio, Rosemary Adriana Chiérici.
Título: Effect of avocado/soybean unsaponifiables on periodontal repair in rats with arthritis and induced periodontitis
Fonte: J. appl. oral sci;27:e20180602, 2019. graf.
Idioma: en.
Projeto: FAPESP (Fundação de Amparo a pesquisa do Estado de São Paulo).
Resumo: Abstract Objective: This study aimed to evaluate the effect of avocado/soybean unsaponifiables (ASU) on periodontal repair in rats with induced periodontitis and arthritis. Methodology: Forty-five rats were submitted to periodontitis induction by insertion of ligatures into the upper second molars, maintained for 15 days. These animals were randomly allocated to 3 groups according to the presence of induced arthritis (ART) and the application of the ASU: Control (CTR) group-healthy animals, where saline solution was administered; ART-animals with induced arthritis, where saline solution was administered; ART/ASU-animals with induced arthritis, where ASU (0.6 mg/ kg) was administered. The drugs were administered daily by gavage and the animals were euthanized after 7, 15 and 30 days of the ligature removal. Bone resorption, inflammatory infiltrate composition and marker proteins expression of the differentiation and formation of osteoclasts (RANKL and TRAP) were assessed. Results: The ART/ASU group presented higher bone volume than the ART group at 7 and 30 days after the ligature removal. Furthermore, the ART group presented higher quantity of inflammatory cells and expression of TRAP and RANKL than the other groups. Conclusion: ASU administration improves the repair of periodontal tissues in an experimental periodontitis model in rats with induced arthritis.
Descritores: Periodontite/tratamento farmacológico
Artrite/tratamento farmacológico
Soja/química
Extratos Vegetais/farmacologia
Persea/química
-Periodontite/patologia
Artrite/patologia
Fatores de Tempo
Imuno-Histoquímica
Distribuição Aleatória
Reprodutibilidade dos Testes
Resultado do Tratamento
Ligante RANK/análise
Microtomografia por Raio-X
Fosfatase Ácida Resistente a Tartarato/análise
Limites: Animais
Masculino
Ratos
Tipo de Publ: Estudo de Avaliação
Responsável: BR28.1 - Serviço de Biblioteca e Documentação Professor Doutor Antônio Gabriel Atta


  5 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1090777
Autor: Saglam, Ebru; Alinca, Suzan Bayer; Celik, Tugba Zengin; Hacisalihoglu, Uguray Payam; Dogan, Mehmet Ali.
Título: Evaluation of the effect of topical and systemic ozone application in periodontitis: an experimental study in rats
Fonte: J. appl. oral sci;28:e20190140, 2020. tab, graf.
Idioma: en.
Projeto: Bezmialem Vakıf University, Scientific Research Project.
Resumo: Abstract Objective: The goal of the present study was to determine the effect of systemic and topical ozone application on alveolar bone loss (ABL) by evaluating the effect of Hypoxia-inducible factor −1 alpha (HIF-1-α) and receptor activator of NF-kB ligand (RANKL)-positive cells on histopathological and immunohistochemical changes in a rat periodontitis model. Methodology: Thirty male Wistar rats were divided into three groups: 1) Group C (control group); 2) Group SO (systemic ozone group) and 3) Group TO (topical ozone group). Experimental periodontitis was induced with a 3/0 silk suture placed at the mandibular left first molars of rats, and the suture was removed 14 days later. Ozone gas was injected intraperitoneally (0.7 mg/kg) in SO group. Topical ozone application protocol was performed using an ozone generator at 80% concentration (4th grade) 90- degree probe for the duration of 30 s. Both ozone applications were carried out for two weeks at intervals of two days. Histomorphometric and immunohistochemical analysis were performed. Results: ABL was significantly lower in Group SO compared to Group C (p: 0.0052). HIF-1α- positive cells were significantly lower in Group TO than in Group C (p: 0.0043). RANKL-positive cells were significantly lower in Group SO and in Group TO compared to the control group (p: 0.0033, p: 0.0075, respectively). Conclusion: Both ozone applications decreased RANKL-positive cell counts, TO application decreased HIF-1-α positive cells counts, and SO application was found to be more effective in reducing ABL compared to control group.
Descritores: Ozônio/administração & dosagem
Periodontite/patologia
Periodontite/tratamento farmacológico
Perda do Osso Alveolar/patologia
Perda do Osso Alveolar/tratamento farmacológico
Subunidade alfa do Fator 1 Induzível por Hipóxia/análise
-Imuno-Histoquímica
Contagem de Células
Reprodutibilidade dos Testes
Administração Tópica
Resultado do Tratamento
Ratos Wistar
Ligante RANK/análise
Limites: Animais
Masculino
Tipo de Publ: Estudo de Avaliação
Responsável: BR28.1 - Serviço de Biblioteca e Documentação Professor Doutor Antônio Gabriel Atta


  6 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1090768
Autor: Ma, Zongmin; Li, Shuxian; Sun, Yuchen.
Título: Effect of enhanced masticatory force on OPG, RANKL and MGF in alveolar bone of ovariectomized rats
Fonte: J. appl. oral sci;28:e20190409, 2020. graf.
Idioma: en.
Projeto: National Natural Science Foundation of China.
Resumo: Abstract Menopause induces oral bone loss, leading to various oral diseases. Mastication importantly affects bone metabolism in the jawbone. Objective: To analyze the effect of enhanced masticatory force on osteoprotegerin (OPG), receptor activator of nuclear factor kappa B ligand (RANKL), and mechano-growth factor (MGF) in alveolar bone of ovariectomized rats and to study the mechanics mechanism of the alveolar bone of ovariectomized rats response to enhanced masticatory force. Methodology: Thirty Sprague Dawley rats were randomly divided into three groups: sham-operation group (fat around the removed ovary + normal hard diet), model group (ovariectomy + normal hard diet), and experimental group (ovariectomy + high hard diet). It was a 2-month experiment. Enzyme-linked immunosorbent assay (ELISA) detected serum estradiol (E2), osteocalcin (BGP) and alkaline phosphatase (ALP) in rats. Bone histomorphometric indices in the third molar region of maxilla were detected by micro-CT; protein expressions of OPG, RANKL, and MGF in the third molar region of maxilla was detected by Western blot; and gene expression of OPG, RANKL, and MGF in the third molar region of maxilla was detected by Quantitative Real-Time PCR. Results: Comparing with model group, serum E2 in experimental group increased but not significantly, serum BGP and serum ALP in experimental group decreased but not significantly, OPG in experimental group in alveolar bone increased significantly, RANKL in experimental group in alveolar bone decreased significantly, RANKL/OPG ratio in experimental group decreased significantly, MGF in experimental group in alveolar bone increased significantly, bone volume to total volume fraction increased significantly in experimental group, trabecular thickness increased significantly in experimental group, and trabecular separation decreased significantly in experimental group. Conclusion: Enhanced masticatory force affected the expression of OPG, RANKL, and MGF in alveolar bone of ovariectomized rats, improved the quality of jaw bone of ovariectomized rats, and delayed oral bone loss by ovariectomy.
Descritores: Força de Mordida
Fator de Crescimento Insulin-Like I/análise
Ovariectomia
Ligante RANK/análise
Osteoprotegerina/análise
Processo Alveolar/fisiopatologia
-Osteocalcina/sangue
Western Blotting
Reação em Cadeia da Polimerase
Ratos Sprague-Dawley
Fosfatase Alcalina/sangue
Estradiol/sangue
Microtomografia por Raio-X
ELISPOT
Limites: Animais
Feminino
Responsável: BR28.1 - Serviço de Biblioteca e Documentação Professor Doutor Antônio Gabriel Atta


  7 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-798182
Autor: Patrocínio-Silva, Tatiane Lopes; Souza, André Moreira Fogaça de; Goulart, Raul Loppi; Pegorari, Carolina Fuirini; Oliveira, Jussan Rodrigues; Fernandes, Kelly Rossetti; Magri, Angela Maria Paiva; Pereira, Rosa Maria Rodrigues; Ribeiro, Daniel Araki; Nagaoka, Márcia Regina; Rennó, Ana Claudia Muniz.
Título: Low-level laser therapy associated to a resistance training protocol on bone tissue in diabetic rats
Fonte: Arch. endocrinol. metab. (Online);60(5):457-464, Oct. 2016. tab, graf.
Idioma: en.
Resumo: ABSTRACT Objective The present study aimed to evaluate the in vivo response of a resistance training and low-level laser therapy (LLLT) on tibias and femurs of rats with diabetes mellitus (DM). Materials and methods Forty male Wistar rats were randomly distributed into four experimental groups: control group (CG), diabetic group (DG), diabetic trained group (TG) and diabetic trained and laser irradiated group (TLG). DM was induced by streptozotocin (STZ) and after two weeks laser and resistance training started, performed for 24 sessions, during eight weeks. At the end of the experiment, animals were euthanized and tibias and femurs were removed for analysis. Histological, histomorphometrical, immunohistochemistry and mechanical analyses were performed. Results Trained groups, with or without laser irradiation, showed increased cortical area, bone density and biomechanical properties. The immunohistochemical analysis revealed that TG and TLG demonstrated an increased RUNX2 expression. RANK-L immunoexpression was similar for all experimental groups. Conclusion In conclusion, it can be suggested that the resistance exercise program stimulated bone metabolism, culminating in increased cortical tibial area, bone mineral content, bone mineral density and biomechanical properties. Furthermore, the association of physical exercises and LLLT produced higher values for bone mineral content and stiffness. Consequently, these data highlight the potential of physical exercise in the management of bone loss due to DM and the possible extra osteogenic stimulus offered by lasertherapy. Further long-term studies should be carried out to provide additional information.
Descritores: Tíbia/efeitos da radiação
Terapia com Luz de Baixa Intensidade/métodos
Diabetes Mellitus/fisiopatologia
Treinamento de Resistência/métodos
Fêmur/efeitos da radiação
Fêmur/fisiologia
-Glicemia/análise
Doenças Ósseas Metabólicas/fisiopatologia
Doenças Ósseas Metabólicas/prevenção & controle
Imuno-Histoquímica
Densidade Óssea/efeitos da radiação
Densidade Óssea/fisiologia
Densitometria/métodos
Diabetes Mellitus/prevenção & controle
Diabetes Mellitus Experimental/fisiopatologia
Diabetes Mellitus Experimental/prevenção & controle
Ligante RANK/análise
Limites: Animais
Masculino
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


  8 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Texto completo
Id: biblio-1119580
Autor: Tenório, Jefferson da Rocha.
Título: Avaliação dos níveis séricos e salivares de RANKL, OPG, IL-1?, IL-6 e TNF-? e sua relação com o índice da cortical mandibular em pacientes com cirrose hepática / Evaluation of serum and salivary levels of RANKL, OPG, IL-1?, IL-6 and TNF-? and their association with mandibular cortical index in patients with liver cirrhosis.
Fonte: São Paulo; s.n; 20200000. 81 p.
Idioma: pt.
Tese: Apresentada a Universidade de São Paulo. Faculdade de Odontologia para obtenção do grau de Doutor.
Resumo: Pacientes com cirrose hepática podem desenvolver osteoporose como complicação relacionada ao déficit funcional hepático. O objetivo desse estudo é o de avaliar a presença de proteínas relacionadas ao metabolismo ósseo (RANKL, OPG, IL-1?, IL-6 e TNF-?) na saliva e no sangue de pacientes cirróticos e compará-los com o índice da cortical mandibular (ICM), relacionado à densidade mineral óssea, em radiografias panorâmicas. Trinta e oito pacientes cirróticos foram submetidos à anamnese, exame físico e tiveram amostras de sangue e de saliva não estimulada coletadas. Desses, 22 apresentavam radiografias panorâmicas que foram avaliadas segundo o ICM. As proteínas foram avaliadas através da tecnologia LuminexTM xMAP. Foram considerados estatisticamente significativos valores de p <=0.05. A maioria dos pacientes era do sexo masculino (68,4%), com idade média de 50,61 anos, média de MELD de 18 pontos no momento da consulta e média de 21,34 meses na fila de espera para o transplante. A análise das radiografias panorâmicas permitiu constatar que a maior parte da amostra apresentava alguma modificação na cortical mandibular sugestiva de alterações osteoporóticas (72,7%). O perfil de expressão das proteínas foi bastante variável no sangue e na saliva. Correlação estatisticamente significativa foi observada entre a expressão salivar de RANKL e OPG em pacientes com ICM alterado. Não foi observada relação estatisticamente significante entre o perfil das proteínas e a etiologia da cirrose, tempo na fila de transplante hepático, idade e sexo dos pacientes. As proteínas RANKL, OPG, IL-1?, IL-6 e TNF-? se comportam de maneira diferente na saliva e no sangue. Valores elevados de RANKL e OPG em saliva estão relacionados com ICM sugestivo de osteoporose em pacientes cirróticos, e propõe-se que esse aumento ocorra devido ao microambiente inflamatório local.
Descritores: Osteoporose
Radiografia Panorâmica
Ligante RANK
Osteoprotegerina
Inflamação
-Cirrose Hepática
Responsável: BR97.1 - Serviço de Documentação Odontológica


  9 / 46 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1049428
Autor: Buttazzoni, Mirena; Galich, Ana María.
Título: Fracturas vertebrales múltiples postsuspensión de denosumab: revisión del tema a partir de dos casos clínicos / Discontinuation of denosumab and multiple vertebral fractures: report of two cases and review of the literature
Fonte: Actual. osteol;15(1):57-64, ene. abr. 2019. ilus., tab..
Idioma: es.
Resumo: Los tratamientos para osteoporosis se indican por tiempo variable dependiendo del tipo de droga, anabólica o anticatabólica, y de la gravedad de la enfermedad. Denosumab es un anticuerpo monoclonal totalmente humano que inhibe a RANK-L evitando de esa manera la interacción entre RANKL-RANK, con la consiguiente inhibición de la formación de los osteoclastos, su activación y sobrevida. Disminuye la resorción ósea cortical y trabecular. Su administración subcutánea de 60 mg cada 6 meses al cabo de 3 años ha demostrado reducción de la resorción ósea, incremento de la densidad mineral ósea y disminución de las fracturas vertebrales, no vertebrales y de cadera. Está indicado para el tratamiento de la osteoporosis con alto riesgo de fractura. Su mecanismo de acción es reversible. Se han descripto pérdida de la DMO y elevación de los marcadores de remodelado óseo postsuspensión. Una situación clínica grave son las fracturas vertebrales múltiples postsuspensión. Este evento es infrecuente y se lo atribuye a un rebote del remodelado óseo, postulándose se postula una predisposición especial, probablemente relacionada con microRNA. Se escriben dos mujeres con osteoporosis que presentaron este cuadro. Las fracturas ocurrieron entre 7 y 10 meses posteriores a la última dosis de denosumab. Registraron elevación de C-telopéptidos y disminución de la DMO conjuntamente con las fracturas vertebrales agudas en cascada. (AU)

The duration of osteoporosis treatments depends on the drug type, anabolic or anticatabolic, and the severity of the disease. Denosumab is a fully human monoclonal antibody that inactivates RANK-L, inhibiting the RANKL-RANK interaction . This inhibits osteoclast formation, activation, and survival. It also reduces cortical and trabecular bone resorption. Subcutaneous administration of 60 mg every 6 months for 3 years has reduced bone resorption, increased bone mineral density (BMD) and decreased vertebral, non-vertebral and hip fractures. It is indicated for the treatment of osteoporosis with high risk of fracture. Denosumab mechanism of action is reversible. After discontinuation, loss of BMD and elevation of bone turnover markers have been observed. In addition, multiple vertebral fractures after the suspension of the drug have been reported. These rebound-associated vertebral fractures are rare. A special genetic predisposition related to miRNA has been proposed. Two women with this clinical presentation are described. Fractures occurred between 7 and 10 months respectively after the last dose of denosumab. They presented with an increase in circulating C-telopeptid levels and a decrease inBMD with acute multiple vertebral fractures. (AU)
Descritores: Fraturas da Coluna Vertebral/tratamento farmacológico
Denosumab/efeitos adversos
-Osteoporose/tratamento farmacológico
Qualidade de Vida
Menopausa
Biomarcadores
Densidade Óssea/efeitos dos fármacos
Cálcio/administração & dosagem
Fraturas da Coluna Vertebral/prevenção & controle
Charibdotoxina/análise
Citrato de Cálcio/administração & dosagem
Alendronato/administração & dosagem
MicroRNAs/metabolismo
Difosfonatos/efeitos adversos
Difosfonatos/uso terapêutico
Ligante RANK/efeitos dos fármacos
Denosumab/administração & dosagem
Fumar Tabaco
Ácido Zoledrônico/administração & dosagem
Ácido Ibandrônico/administração & dosagem
Indapamida/administração & dosagem
Limites: Humanos
Feminino
Pessoa de Meia-Idade
Idoso
Tipo de Publ: Relatos de Casos
Responsável: AR2.1 - Biblioteca Central


  10 / 46 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1049002
Autor: Delpino, María Victoria.
Título: Inmunopatología de la brucelosis osteoarticular / Immunopathology of osteoarticular brucelosis
Fonte: Actual. osteol;15(1):34-43, ene. abr. 2019. ilus..
Idioma: es.
Resumo: La brucelosis es una de las enfermedades zoonóticas más importantes a nivel mundial capaz de producir enfermedad crónica en los seres humanos. La localización osteoarticular es la presentación más común de la enfermedad activa en el hombre. Sin embargo, algunos de los mecanismos moleculares implicados en la enfermedad osteoarticular han comenzado a dilucidarse recientemente. Brucella abortus induce daño óseo a través de diversos mecanismos en los cuales están implicados TNF-α y RANKL. En estos procesos participan células inflamatorias que incluyen monocitos/macrófagos, neutrófilos, linfocitos T del tipo Th17 y linfocitos B. Además, B. abortus puede afectar directamente las células osteoarticulares. La bacteria inhibe la deposición de la matriz ósea por los osteoblastos y modifica el fenotipo de estas células para producir metaloproteinasas de matriz (MMPs) y la secreción de citoquinas que contribuyen a la degradación del hueso. Por otro lado, la infección por B. abortus induce un aumento en la osteoclastogénesis, lo que aumenta la resorción de la matriz ósea orgánica y mineral y contribuye al daño óseo. Dado que la patología inducida por Brucella afecta el tejido articular, se estudió el efecto de la infección sobre los sinoviocitos. Estos estudios revelaron que, además de inducir la activación de estas células para secretar quemoquinas, citoquinas proinflamatorias y MMPs, la infección inhibe la muerte por apoptosis de los sinoviocitos. Brucella es una bacteria intracelular que se replica en el retículo endoplásmico de los macrófagos. El análisis de los sinoviocitos infectados con B. abortus indicó que las bacterias también se multiplican en el retículo endoplasmático, lo que sugiere que la bacteria podría usar este tipo celular para la multiplicación intracelular durante la localización osteoarticular de la enfermedad. Los hallazgos presentados en esta revisión intentan responder a preguntas sobre los mediadores inflamatorios implicados en el daño osteoarticular causado por Brucella. (AU)

Brucellosis is one of the most important zoonotic diseases that can produce chronic disease in humans worldwide. Osteoarticular involvement is the most common presentation of human active disease. The molecular mechanisms implicated in bone damage have started to be elucidated. B. abortus induces bone damage through diverse mechanisms in which TNF-α and RANKL are implicated. These processes are driven by inflammatory cells, including monocytes/macrophages, neutrophils, Th17 lymphocytes and B cells. Also, Brucella abortus (B. abortus) can directly affect osteoarticular cells. The bacterium inhibits bone matrix deposition by osteoblast and modifies the phenotype of these cells to produce matrix methalloproteinases (MMPs) and cytokine secretion that contribute to bone matrix degradation. B. abortus also affects osteoclast increasing mineral and organic bone matrix resorption and contributing to bone damage. Since the pathology induced by Brucella species involves joint tissue, experiments conducted in sinoviocytes revealed that besides inducing the activation of these cells to secrete chemokines, proinflammatory cytokines and MMPS, the infection also inhibits sinoviocyte apoptosis. Brucella is an intracellular bacterium that replicate in the endoplasmic reticulum of macrophages. The analysis of B. abortus infected sinoviocytes indicated that bacteria also replicate in their reticulum suggesting that the bacterium could use this cell type for intracellular replication during the osteoarticular localization of the disease. The findings presented in this review try to answer key questions about the inflammatory mediators involved in osteoarticular damage caused by Brucella. (AU)
Descritores: Osteoartrite/patologia
Brucella abortus/patogenicidade
Brucelose/patologia
-Osteoartrite/imunologia
Osteoblastos/patologia
Osteócitos/microbiologia
Osteogênese/imunologia
Brucella abortus/imunologia
Brucelose/etiologia
Brucelose/imunologia
Linfócitos B/patologia
Citocinas/efeitos adversos
Fator de Necrose Tumoral alfa/efeitos adversos
Metaloproteinases da Matriz/síntese química
Ligante RANK/efeitos adversos
Células Th17/patologia
Sinoviócitos/imunologia
Macrófagos/patologia
Neutrófilos/patologia
Limites: Humanos
Animais
Tipo de Publ: Revisão
Responsável: AR2.1 - Biblioteca Central



página 1 de 5 ir para página              
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde