Base de dados : LILACS
Pesquisa : D05.750.078.280.300.100 [Categoria DeCS]
Referências encontradas : 123 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 13 ir para página                         

  1 / 123 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-973364
Autor: Silva, Carlos Eduardo da; Repka, João Carlos Domingues; Souza, Carlos José Franco de; Matias, Jorge Eduardo Fouto.
Título: Effects of renal dysfunction on healing of colonic anastomosis: experimental study in wistar rats / Efeitos da disfunção renal na cicatrização de anastomoses colônicas: estudo experimental em ratos wistar
Fonte: ABCD arq. bras. cir. dig;31(4):e1398, 2018. graf.
Idioma: en.
Resumo: ABSTRACT Background: Chronic kidney disease affects more than 500 million people worldwide. In this context, the uremic toxins present are related to worsening in tissue healing. Aim: Evaluate on healing of colonic anastomosis in uremic rats, serum and anatomopathological indicators, which may be related to the change tissue repair process. Methods: Twenty Wistar rats, were randomly separated into two groups. In the sham group they were submitted to 5/6 nephrectomy simulation in left kidney, simulation right nephrectomy, median laparotomy, colotomy and colorraphy. In the uremia group, they were submitted to 5/6 nephrectomy of the left kidney, total nephrectomy of the right kidney and median laparotomy, colotomy and colorraphy. Were collected for serum urea, creatinine and CRP dosages and the colonic segments were studied for evaluation of granulation tissue, collagen maturation, microvascular and myofibroblasts density, and cell viability. Through histochemical processing, microvascular density was evaluated by anti-CD34 monoclonal antibody marking, cell viability by cell proliferation nuclear antigen screening and myofibroblasts density with monoclonal anti-α-actin antibody. Computerized histometry was used for evaluations of collagens type I and III by the coloration of picrosirius. Results: The group submitted to nephrectomy 5/6, compared to the sham group, show urea increase (p<0.0000) and higher C reactive protein (p=0.0142). Decrease of granulation tissue formation (border reepithelialization p=0,0196, angiofibroblast proliferation p=0.0379), mean collagen I (p=0,0009) and collagen III (p=0,016), microvascular density (p=0,0074), cell proliferation nuclear antigen (p<0,0000) and myofibroblasts (p<0,0001). Conclusion: The uremia induced by nephrectomy 5/6 model establishes negative impact in the colonic wound healing.

RESUMO Racional: A doença renal crônica atinge mais de 500 milhões de pessoas em todo o mundo. Neste contexto, as toxinas urêmicas estão relacionadas ao comprometimento da cicatrização tecidual. Objetivo: Avaliar, na cicatrização de anastomoses colônicas de ratos urêmicos indicadores séricos e anatomopatológicos que possam estar relacionados com alteração do processo de reparação tissular. Métodos: Utilizaram-se 20 ratos Wistar divididos aleatoriamente em dois grupos. No grupo simulação eles foram submetidos à simulação da nefrectomia 5/6 do rim esquerdo, simulação de nefrectomia total do rim direito, laparotomia mediana, colotomia e colorrafia. No grupo uremia, eles foram submetidos à nefrectomia 5/6 do rim esquerdo, nefrectomia total do rim direito, laparotomia mediana, colotomia e colorrafia. Coletaram-se amostras de sangue para dosagens séricas da ureia, creatinina e proteína C reativa, e do cólon para processamentos histológicos e histoquímicos na avaliação do tecido de granulação, maturação de colágeno, densidade microvascular e de miofibroblastos, viabilidade celular cicatricial. Empregou-se a histometria computadorizada para as avaliações de colágenos tipos I e III, densidade microvascular pela marcação com anticorpo monoclonal anti-CD34, viabilidade celular pela pesquisa do antígeno nuclear de proliferação celular e a densidade de miofibroblastos com anticorpo monoclonal anti-α-actina. Resultados: O grupo submetido à nefrectomia 5/6, em comparação ao grupo simulação, demonstraram aumentos da ureia sérica (p<0,0000) e proteína C reativa (p=0,0142), redução da formação de tecido de granulação (reepitelização de bordas p=0,0196, proliferação angiofibroblástica p=0,0379), porcentagens de colágeno I (p=0,0009) e colágeno III (p=0,016), densidade microvascular (p=0,0074) e miofibroblastos (p<0,0001) e antígeno nuclear de proliferação celular (p<0,0000). Conclusão: A uremia induzida pelo modelo de nefrectomia 5/6 determina impacto negativo no processo de cicatrização colônico.
Descritores: Uremia/fisiopatologia
Cicatrização/fisiologia
Colo/cirurgia
Ferida Cirúrgica/fisiopatologia
-Proteína C-Reativa/análise
Anastomose Cirúrgica
Distribuição Aleatória
Ratos Wistar
Colágeno Tipo I/análise
Colágeno Tipo I/metabolismo
Colágeno Tipo III/análise
Colágeno Tipo III/metabolismo
Insuficiência Renal Crônica/fisiopatologia
Miofibroblastos/fisiologia
Tecido de Granulação/fisiopatologia
Nefrectomia
Limites: Animais
Responsável: BR1.1 - BIREME


  2 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-796284
Autor: Sardiñas, Carlos; Arreaza, Dilia Diaz; Osorio, Héctor.
Título: Changes in the proportions of types I and III collagen in hemorrhoids: the sliding anal lining theory / Mudanças nos percentuais do colágeno dos tipos I e III em hemorroidas: teoria do revestimento anal deslizante
Fonte: J. coloproctol. (Rio J., Impr.);36(3):124-129, July-Sept. 2016. ilus.
Idioma: en.
Resumo: Abstract Objective This study aims to determine changes in the proportions of types I and III collagen in hemorrhoids and to verify the sliding anal canal lining theory. Patients and method The study is focused on a sample of 17 patients, 9 females and 8 males (age range: 30-70 years), with grade III and grade IV hemorrhoids. Tissue from 4 fetuses (age: 16 weeks of gestation) was used as control sample. All the participants gave their informed consent. Samples were gathered in 2014. All patients underwent open hemorrhoidectomy by using the technique described by Milligan and Morgan, published in Lancet journal in 1937. The hemorrhoid samples were stained with hematoxylin-eosin for the histologic study to confirm the hemorrhoidal tissue diagnosis. The picrosirius red staining protocol was used after the histologic analysis. The method used for image processing is described in the text. Images were imported to the Image Tool for Windows software. The same process was used on the embryonic tissue. Data resulting from the analysis of images were processed using STATISTICA, a software for statistical analysis. Results When compared, it was found that the two tissues presented very different values, with hemorrhoids containing the highest type III collagen values. Conclusion Our results seem to imply that hemorrhoids have a larger proportion of type III collagen than fetal tissue. They also suggest a possible age-related deterioration of the tissue.

Resumo Objetivo Esse estudo tem por objetivo determinar mudanças nos percentuais do colágeno dos tipos I e III em hemorroidas e verificar a teoria do revestimento de canal anal deslizante. Pacientes e método O estudo está focado em uma amostra de 17 pacientes (9 mulheres e 8 homes; faixa etária: 30-70 anos), com hemorroidas de graus III e IV. Utilizamos tecido de quatro fetos (idade: 16 semanas de gestação) como amostra de controle. Todos os participantes deram consentimento informado. As amostras foram reunidas em 2014. Todos os pacientes passaram por uma hemorroidectomia aberta; para tanto, foi empregada a técnica descrita por Milligan e Morgan, publicada no periódico Lancet em 1937. As amostras de hemorroida foram coradas com hematoxilina-eosina com vistas ao estudo histológico para confirmação do diagnóstico de tecido hemorroidal. Após a análise histológica, o material foi corado com o protocolo de picrosirius red. O método empregado para o processamento das imagens está descrito no texto. As imagens foram importadas pelo software Image Tool for Windows. O mesmo processo foi empregado no tecido embrionário. Os dados resultantes da análise das imagens fora processados com o programa STATISTICA, um software para análise estatística. Resultados Por comparação, constatamos que os dois tecidos apresentavam valores muito diferentes, e as hemorroidas continham os mais altos valores de colágeno do tipo III. Conclusão Nossos resultados parecem implicar que hemorroidas possuem um percentual mais elevado de colágeno do tipo III versus tecido fetal. Os resultados também sugerem uma possível deterioração do tecido, relacionada à idade.
Descritores: Colágeno Tipo I
Colágeno Tipo III
Hemorroidas
-Canal Anal/anatomia & histologia
Hemorroidectomia
Limites: Humanos
Masculino
Feminino
Responsável: BR545.3 - Biblioteca ICBS


  3 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Texto completo
Id: lil-676175
Autor: Sesman, Ana; Ruvalcaba, Erika; Herrera, Arturo; Sánchez Guerrero, Sergio; Lecona, Hugo; Baena-Ocampo, Leticia; Solis, Lilia; Ávila, Hector; García de la Puente, Silvestre; Vargas, Betha; Guerrero, Xochitl; Velasquillo, Cristina.
Título: Morphological study of bone cranial in athymic mice / Estudio morfológico de hueso craneal en ratones atímicos
Fonte: Int. j. morphol;31(1):321-328, mar. 2013. ilus.
Idioma: en.
Projeto: CONACYT.
Resumo: The aim of our research was to create an osteogenic unit in the skulls of athymic mice; however, the first challenge we faced was to find sufficient and adequate data that would allow us to determine the morphological, immunohistochemical and microtopographical characteristics that could be used as normality standards in athymic mice skulls and, hence, a reference in the event of achieving the formation of de novo bone using the osteogenic unit we proposed. Knowing the normal bone morphology in the skull of athymic mice was a necessary precondition to develop subsequently an osteogenic unit possessing the Osteogenesis, Osteoinduction and Osteoconductivity that could be compared versus those in the normal bone during its formations and remodeling processes. Therefore, we conducted a pilot study to determine bone morphological characteristics in the skull of athymic mice by means of specific histological staining: hematoxylin-eosin and Von Kossa, for osteoid tissue and mineralized bone, and Masson Tri-chrome for ossified areas. We also use immunohistochemistry to detect bone formation markers: alkaline phosphatase resulting from osteoblastic activity stimulation, type 1 collagen a bonematrix structural protein; Osteopontine, a protein specifically synthesized by osteoblasts that favors cell proliferation and remodeling in bone defects; Osteocalcine, a peptide hormone produced by osteoblasts during bone formation; and, Runx 2, a transcription factor expressed by stem cells which stimulates bone differentiation. Likewise, we used electron microscopy on the newly formed tissue to determine the presence of organic deposits, such as calcium, phosphate and magnesium in bone tissue.

Propusimos la realización de una unidad osteogénica a desarrollar en cráneo de ratones atímicos, Sin embargo, nos enfrentamos al reto de encontrar datos que nos determinaran cuales eran las características morfológicas, inmunohistoquímicas y micro-topográficas del cráneo de estos ratones atímicos, que nos sirvieran como referencia de normalidad y tener un punto de comparación, en caso de que pudiéramos lograr la formación de hueso de novo, a partir de la unidad osteogénica que propusimos. El objetivo, de conocer la morfología del hueso normal de cráneo de ratones atímicos, fue desarrollar posteriormente una unidad osteogénica que reuniera las características de Osteogénesis, Osteoinducción y Osteoconducción, y, compararlas contra las que tiene dicho hueso normal durante su proceso de formación y remodelación. Así, realizamos un estudio piloto donde establecimos características morfológicas de hueso del cráneo de ratones atímicos, a través de tinciones histológicas específicas, con hematoxilina-eosina y von Kossa para buscar tejido osteoide y hueso mineralizado y Tricrómico de Massón para observar zonas osificadas. Además, analizamos el tejido óseo a través de inmunohistoquímica, con la finalidad de buscar marcadores de formación ósea como fosfatasa alcalina que es resultado del estímulo de la actividad osteoblástica; colágena 1, la cual es una proteína estructural de la matriz ósea; osteopontina, proteína sintetizada específicamente por osteoblastos que favorece la proliferación celular y la remodelación en defectos óseos; osteocalcina hormona peptídica producida por los osteoblastos durante la formación ósea y Runx 2 Factor de transcripción expresado por las células progenitoras que estimula la diferenciación ósea. Además, sometimos el tejido óseo a microscopía electrónica para determinar la presencia de depósitos de compuestos como calcio, fósforo y magnesio.
Descritores: Crânio/anatomia & histologia
Crânio/crescimento & desenvolvimento
-Osteogênese
Regeneração Óssea
Ratos Nus
Imuno-Histoquímica
Microscopia Eletrônica/métodos
Colágeno Tipo I
Fosfatase Alcalina
Limites: Animais
Ratos
Responsável: CL1.1 - Biblioteca Central


  4 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1254920
Autor: Nuñez, Suleivys M; Guzmán, Fanny; Valencia, Pedro; Almonacid, Sergio; Cárdenas, Constanza.
Título: Collagen as a source of bioactive peptides: a bioinformatics approach
Fonte: Electron. j. biotechnol;48:101-108, nov. 2020. tab, ilus.
Idioma: en.
Projeto: ANID PIA.
Resumo: BACKGROUND: Collagen is the most abundant protein in animals and can be obtained from residues of the food industry. Its hydrolysate has many desirable properties that make it suitable as an additive in foods and cosmetics, or as a component of scaffold materials to be used in biomedicine. RESULTS: We report here the characterization of type I collagen from five different sources, namely bovine, porcine, chicken, trout and salmon, as well as their hydrolysates by means of bioinformatics tools. As expected, the results showed that bovine and porcine collagen, as well as trout and salmon collagen, can be used interchangeably due to their high identity. This result is consistent with the evolution of proteins with highly identical sequences between related species. Also, 156 sequences were found as potential bioactive peptides, 126 from propeptide region and 30 from the central domain, according to the comparison with reported active sequences. CONCLUSIONS: Collagen analysis from a bioinformatic approach allowed us to classify collagen from 5 different animal sources, to establish its interchangeability as potential additive in diverse fields and also to determine the content of bioactive peptides from its in silico hydrolysis.
Descritores: Peptídeos
Colágeno/química
Biologia Computacional
-Hidrolisados de Proteína
Salmão
Suínos
Análise por Conglomerados
Colágeno Tipo I
Aditivos em Cosméticos
Aditivos Alimentares
Hidrólise
Limites: Animais
Bovinos
Responsável: CL1.1 - Biblioteca Central


  5 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-983696
Autor: Lambis, Lina; Solana, José Belisário; Suárez, Amileth.
Título: Expresión de TGF-p como indicio temprano de lesión del tejido hepático en la enfermedad de hígado graso no alcohólico / Expression of TGF-p as an early sign of liver tissue injury in nonalcoholic fatty liver disease
Fonte: Acta méd. colomb;43(3):142-149, jul.-set. 2018. tab, graf.
Idioma: es.
Resumo: Resumen Introducción: la enfermedad de hígado graso no alcohólico (NAFLD) constituye un problema de salud pública asociado con el síndrome metabólico; su patogénesis implica el inicio de una cascada de señalización bioquímica compleja y su estimulación continua podría consolidar un proceso de fibrogénesis en el tejido. El objetivo del estudio fue analizar expresión de genes implicados en daño hepático, en los procesos iniciales de la lesión en pacientes con NAFLD o con factores de riesgo relacionados a esta patología, en búsqueda de biomarcadores moleculares útiles a la práctica clínica tales como TGF-pi, COL1A2 y MMP20. Metodología: estudio analítico de corte transversal. Se estudiaron características epidemiológicas, bioquímicas, y expresión génica de TGF-pU, COL1A2 y MMP20 en tejido hepático, en individuos con factores de riesgo para NAFLD. Resultados: se incluyeron 83 participantes con factores de riesgo asociados a NAFLD, 22 individuos (26.5%) fueron diagnosticados con NAFLD mediante ultrasonografía. Los factores de riesgo hallados fueron hipertensión arterial (50.6%), obesidad (49.4%), diabetes mellitus (34.9%) y dislipidemia (21.7%). La dislipidemia fue significativamente asociada con el riesgo de desarrollar NAFLD (OR=4; p=0.011). Se encontraron diferencias significativas para colesterol total (p<0.05); y una expresión génica de TGF--31 (con NAFLD p<0.0001 y sin NAFLD p<0.0001 frente al control) y COL1A2 (con NAFLD p=0.002 y sin NAFLD p=0.955 frente al control) con un patrón de expresión creciente a mayor grado de lesión hepática. Conclusión: para concluir, sugerimos activación de las vías de señalización que conducen a fibrogénesis en individuos con factores de riesgo para NAFLD, y mucho más acentuada en pacientes con NAFLD.

Abstract Introduction: nonalcoholic fatty liver disease (NAFLD) is a public health problem associated with the metabolic syndrome; its pathogenesis implies the start of a complex biochemical signaling cascade and its continuous stimulation could consolidate a fibrogenesis process in the tissue. The aim of the study was to analyze expression of genes involved in liver damage in the initial processes of the lesion in patients with NAFLD or with risk factors related to this pathology, in search of molecular biomarkers useful to clinical practice such as TGF--31, COL1A2 and MMP20. Methodology: cross-sectional analytical study. Epidemiological, biochemical, and gene expression characteristics of TGF--31, COL1A2 and MMP20 in liver tissue in individuals with risk factors for NAFLD were studied. Results: 83 participants with risk factors associated to NAFLD were included; 22 individuals (26.5%) were diagnosed with NAFLD by ultrasonography. The risk factors found were hypertension (50.6%), obesity (49.4%), diabetes mellitus (34.9%) and dyslipidemia (21.7%). Dyslipidemia was significantly associated with the risk of developing NAFLD (OR = 4; p = 0.011). Significant differences were found for total cholesterol (p <0.05); and a gene expression of TGF-P1 (with NAFLD p <0.0001 and without NAFLD p <0.0001 versus control) and COL1A2 (with NAFLD p = 0.002 and without NAFLD p = 0.955 versus control) with a pattern of increasing expression at higher degree of liver injury. Conclusion: to conclude, we suggest activation of the signaling pathways that lead to fibrogenesis in individuals with risk factors for NAFLD, and much more accentuated in patients with NAFLD.
Descritores: Hepatopatia Gordurosa não Alcoólica
-Fatores de Crescimento Transformadores
Síndrome Metabólica
Colágeno Tipo I
Metaloproteinases da Matriz Associadas à Membrana
Fígado Gorduroso
Limites: Humanos
Masculino
Feminino
Responsável: CO70 - Asociación Colombiana de Medicina Interna


  6 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1101295
Autor: Avetikov, David Solomonovich; Buchanhenko, Olga Petrivna; Shlykova, Oksana Anatoliivna; Izmajlova, Olga Vitaliivna; Lokes, Kateryna Petrivna; Klitynska, Oksana Vasylivna; Vesnina, Ludmila Eduardivna; Kajdashev, Igor Petrovich.
Título: Presence of Type 1 Collagen Alpha-2 (COL1A2) (rs42524) Gene Polymorphism and Scar Tissue Formation in Different Areas of Head and Neck
Fonte: Pesqui. bras. odontopediatria clín. integr;20:e4422, 2020. tab.
Idioma: en.
Resumo: Abstract Objective: To determine the effect type I collagen gene polymorphism alpha-2 (COL1A2) (rs42524) on the formation of scar tissue that is localized in the head and neck areas. Material and Methods: Sixty patients with scars in different areas of the head and neck were examined. The patients were divided into four subgroups, according to the types of scarring: G I: 15 patients with normotrophic scars; G ІІ: 15 patients with atrophic scars; G ІІІ: 15 patients with hypertrophic scars; and G IV: 15 patients with keloid scars. The age of patients ranged from 17 to 54 years. The single-nucleotide polymorphic site of the COL1A2 (rs42524) gene was detected by a polymerase chain reaction and subsequent analysis of restriction fragment lengths. Pearson's chi-squared test with Yates's correction and Fischer's exact test were used. Results: There were no significant changes between the control and basic groups (p=0.83) at analyzing the frequencies of G and C alleles. For the G allele, the calculation of odds ratio between the basic and control groups was 0.93 at 95% confidence interval (CI) (0.50-1.75), for the C allele - OR was 1.07 at 95% CI (0.57-2.01). Conclusion: Our studies may indirectly indicate the activation of the skin's protective reaction to physiological scarring and dosed scar formation in different areas of the head and neck.
Descritores: Polimorfismo Genético
Reação em Cadeia da Polimerase
Cicatriz Hipertrófica
Colágeno Tipo I
Cabeça
-Ucrânia
Distribuição de Qui-Quadrado
Intervalos de Confiança
Estatísticas não Paramétricas
Limites: Humanos
Masculino
Feminino
Adolescente
Adulto
Pessoa de Meia-Idade
Tipo de Publ: Estudo Comparativo
Responsável: BR1264.1 - Biblioteca Setorial Prof Alberto M Campos


  7 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-952786
Autor: Blotta, Rosa Maria; Costa, Sirlei dos Santos; Trindade, Eduardo Neubarth; Meurer, Luise; Maciel-Trindade, Manoel Roberto.
Título: Collagen I and III in women with diastasis recti
Fonte: Clinics;73:e319, 2018. tab, graf.
Idioma: en.
Resumo: OBJECTIVES: Interest in elucidating the etiology of hernias has encouraged countless studies of musculoaponeurotic structures in individuals with and without hernias. Studies of hernia patients have firmly demonstrated a correlation between hernias and collagen alterations in their fascia. Diastasis recti is an increased width of the abdominal midline that is exclusively composed of interlacing aponeurotic expansions of the anterolateral abdominal muscles. The condition is common among women undergoing abdominoplasty, and many factors, not only mechanical, play a role. The goal of this study is to evaluate and compare collagen type I and III levels in the midline fascia of women with and without diastasis recti to report their possible influence on this condition. METHODS: This is a case-control study nested within a surgical cohort of 18 women with diastasis recti and 18 women without the condition (cases and controls, respectively). Fascia from the midline of the abdominal wall was collected and analyzed through immunohistochemistry using polyclonal antibodies to collagen type I and III. RESULTS: Both type I and type III collagen were less abundant in women with diastasis recti than in those without the condition, and the difference was statistically significant (p<0.001). CONCLUSION: Low collagen type I and type III levels in the midline of the abdominal wall may play a key role in the development of diastasis recti.
Descritores: Síndrome do Abdome em Ameixa Seca/metabolismo
Colágeno Tipo I/análise
Colágeno Tipo III/análise
Parede Abdominal/patologia
-Síndrome do Abdome em Ameixa Seca/patologia
Imuno-Histoquímica
Lipectomia
Estudos de Casos e Controles
Limites: Humanos
Feminino
Adulto
Responsável: BR1.1 - BIREME


  8 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Chile
Belangero, William Dias
Texto completo
Id: biblio-1134454
Autor: Garcia, Thiago Alves; Ozaki, Guilherme Akio Tamura; Castoldi, Robson Chacon; Job, Aldo Eloizo; Camargo, Regina Celi Trindade; Filho, José Carlos Silva Camargo; Belangero, William Dias.
Título: Collagen I and III ratios and tenacity of rats muscle injured and treated with platelet-rich plasma / Relaciones de colágeno I y III y tenacidad del músculo de rata lesionado y tratado con plasma rico en plaquetas
Fonte: Int. j. morphol;38(5):1392-1397, oct. 2020. graf.
Idioma: en.
Projeto: Brazilian Agency of Resources for Higher Education Personnel.
Resumo: SUMMARY: Severe muscle injuries are common in accidents and have a delayed recovery of muscle integrity. In these cases, muscle suture surgery is the standard treatment. However, Platelet Rich Plasma (PRP), has been widely used in orthopedic injuries due to its growth factors. Thus, the objective of the study will be to analyze the association of suture and PRP techniques in the collagen and tenacity of the injured muscle. Were used seventy rats, divided into five groups: control (C), injury control (CI), injury and suture (IS), injury and PRP (IP), injury, suture, and PRP (ISP). Were sectioned approximately 50 % of the width and 100 % of the thickness of the gastrocnemius muscle. The homologous PRP was applied 24h after the injury. On the 7th day after the injury, the animals were euthanized and their muscles subjected to mechanical testing to measure tenacity or collagen analysis to calculate the ratio between type I and III collagen. The results show a significant decrease (p <0.05) in the values of the relationship between collagens in all injured groups (CI, IS, IP, ISP) compared to group C. In injured groups, the tenacity was significantly (p <0.05) reduced compared to the control group, with no observed difference between treatments and injured groups. The amount of collagen in the injured area has increased, but it did not affect the tenacity of the muscles, which was reduced.

RESUMEN: Las lesiones musculares graves son comunes durante los accidentes y la integridad del músculo está sujeta a una larga recuperación. En esos casos la cirugía, para la sutura del músculo, es el tratamiento común, no obstante el plasma rico en plaquetas (PRP) ha sido utilizado recientemente en lesiones ortopédicas, debido a sus factores del crecimiento. El objetivo del estudio fue analizar la asociación de las técnicas de sutura y PRP en la histología y tenacidad de músculo lesionado. Fueron utilizadas 70 ratas distribuidas en cinco grupos: control (C), control lesión (CL), lesión y sutura (LS), lesión y PRP (LPRP), lesión, sutura y PRP (LSPRP). Aproximadamente en la lesión, el 50 % de la longitud y el 100 % del espesor del músculo gastrocnemio fueron seccionados. El PRP homólogo fue aplicado 24 horas después de la lesión. En el 7º día después de la lesión los animales fueron eutanasiados y las muestras fueran sometidas al ensayo mecánico para la medición de la tenacidad y análisis del colágeno, para realizar el cálculo de la relación entre los colágenos I y III. Los resultados demostraron una reducción significativa (p<0,05) en los valores de la relación entre los colágenos en todos los grupos lesionados en relación al grupo C. La tenacidad fue (p<0,05) reducida significativamente en los grupos lesionados en relación al grupo control, sin diferencia entre los tratados. En la lesión muscular hubo disminución de los valores de colágeno, aunque en los tratamientos se observó elevación de la cantidad de colágeno en la área lesionada, esta no tuvo efecto en la tenacidad de los músculos que fue disminuida en la lesión.
Descritores: Colágeno/análise
Músculo Esquelético/lesões
Plasma Rico em Plaquetas
Doenças Musculares/terapia
-Suturas
Ratos Wistar
Lesões dos Tecidos Moles/terapia
Colágeno Tipo I/análise
Colágeno Tipo III/análise
Limites: Animais
Masculino
Ratos
Responsável: CL1.1 - Biblioteca Central


  9 / 123 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1089605
Autor: Zhao, Yu-Xiao; Song, Yu-Wen; Zhang, Liang; Zheng, Feng-Jie; Wang, Xue-Meng; Zhuang, Xiang-Hua; Wu, Fei; Liu, Jian.
Título: Association between bile acid metabolism and bone mineral density in postmenopausal women
Fonte: Clinics;75:e1486, 2020. tab.
Idioma: en.
Projeto: National Natural Science Foundation of China; . National Natural Science Fund for Distinguished Young Scholars; . Natural Science Foundation of Shandong Province; . Key Research and Development Plan of Shandong Province.
Resumo: OBJECTIVES: Previous studies have not shown any correlation between bile acid metabolism and bone mineral density (BMD) in women with postmenopausal osteoporosis. Thus, the current study evaluated the association between bile acid levels as well as BMD and bone turnover marker levels in this group of women. METHODS: This single-center cross-sectional study included 150 postmenopausal Chinese women. According to BMD, the participants were divided into three groups: osteoporosis group, osteopenia group, and healthy control group. Serum bile acid, fibroblast growth factor 19 (FGF19), and bone turnover biomarker levels were assessed. Moreover, the concentrations of parathyroid hormone, 25-hydroxy vitamin D [25(OH)D], procollagen type I N-peptide (P1NP), and beta-CrossLaps of type I collagen containing cross-linked C-terminal telopeptide (β-CTX) were evaluated. The BMD of the lumbar spine and proximal femur were examined via dual-energy X-ray absorptiometry. RESULTS: The serum total bile acid levels in the osteoporosis and osteopenia groups (5.28±1.56 and 5.31±1.56 umol/L, respectively) were significantly lower than that in the healthy control group (6.33±2.04 umol/L; p=0.002 and 0.018, respectively). Serum bile acid level was positively associated with the BMD of the lumbar spine, femoral neck, and total hip. However, it negatively correlated with β-CTX concentration. Moreover, no correlation was observed between bile acid and P1NP levels, and the levels of the other biomarkers that were measured did not differ between the groups. CONCLUSION: Serum bile acid was positively correlated with BMD and negatively correlated with bone turnover biomarkers reflecting bone absorption in postmenopausal women. Thus, bile acid may play an important role in bone metabolism.
Descritores: Densidade Óssea
-Bile
Biomarcadores
Absorciometria de Fóton
Osteoporose Pós-Menopausa
Estudos Transversais
Remodelação Óssea
Pós-Menopausa
Colágeno Tipo I
Limites: Humanos
Feminino
Pessoa de Meia-Idade
Responsável: BR1.1 - BIREME


  10 / 123 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1142762
Autor: Martins, Hilana Rickli Fiuza; Zotz, Talita G. Gnoato; Messa, Sabrina Peviani; Capriglione, Luiz Guilherme A; Zotz, Rafael; Noronha, Lucia; Azevedo, Marina Louise Viola De; Gomes, Anna Raquel Silveira.
Título: Morphometric and molecular muscle remodeling after passive stretching in elderly female rats
Fonte: Clinics;75:e1769, 2020. tab, graf.
Idioma: en.
Resumo: OBJECTIVES: To determine the effects of three sessions of a passive stretching exercise protocol on the muscles of elderly female rats. METHODS: The effects of the stretching exercises on the soleus muscle were analyzed using immunohistochemistry [tissue inhibitors of matrix metalloproteinases (TIMP), the tumor necrosis factor-alpha (TNF-α), and the gene expression levels using real-time PCR of the transforming growth factor-beta 1 (TGF-β1), collagen type 1 (COL1), and collagen type 3 (COL3)]. Fifteen 26-month-old female Wistar rats were randomly divided into two groups, namely, Stretching (SG, n=8) and Control (CG, n=7). The passive mechanical stretching protocol consisted of a set of 4 1-minute repetitions, with 30 seconds between each repetition (total treatment of 4 minutes), three times a week for 1 week. RESULTS: Immunohistochemical analysis revealed an increase of 71.4% in the TNF-α (p=0.04) gene expression levels for the SG and a 58% decrease in the TGF-β1 gene expression levels (p=0.005) in the SG compared to that in the CG. No significant differences were observed between the groups for the immunostaining of TIMP-1 or the gene expression levels of COL1 and COL3. CONCLUSION: Three sessions of static stretching reduced the gene expression level of TGF-β1, which, owing to its anti-fibrotic role, might contribute to the remodeling of the intramuscular connective tissue of the aging muscle. In addition, immunostaining revealed that TNF-α levels increased in the aging muscle tissue in response to stretching, indicating its effect on stimulating extracellular matrix degradation. These outcomes have important clinical implications in reinforcing the use of stretching exercises in the elderly, considering that the aging muscle presents an infiltration of connective tissue.
Descritores: Exercícios de Alongamento Muscular
-Ratos Wistar
Músculo Esquelético
Colágeno Tipo I/genética
Colágeno Tipo III/genética
Fator de Crescimento Transformador beta1
Limites: Humanos
Animais
Feminino
Idoso
Ratos
Responsável: BR1.1 - BIREME



página 1 de 13 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