Analysis of the decompressive treatment of the vertebral canal through the trans-spinal approach / Análise do tratamento descompressivo do canal vertebral pela via transespinhosa / Análisis del tratamiento descompresivo del canal vertebral mediante el enfoque transespinal

ABSTRACT Objective: The spinous process separation technique is a less invasive surgical technique for treating lumbar canal stenosis. The objective is to evaluate this technique's results in treating lumbar canal stenosis. Method: Thirty patients with lumbar spinal canal stenosis underwent surgical treatment using the spinous process separation technique and were evaluated in the 3-year postoperative period using the Denis Pain and Work Scale and by the SF-36 questionnaire and radiographic evaluation of the operated segment. Results: In the evaluation of the Denis pain scale, 21 (70%) patients had no pain (P1), and nine (30%) patients reported minimal low back pain, not needing medication (P2). Denis' work schedule showed that nine (30%) patients had restrictions on returning to their previous work activity (W2), and 21 (70%) patients were classified as W1. The SF-36 questionnaire showed results of 81.25 for physical aspects (PA), 81.9 for functional capacity (FC), 81.3 for emotional aspects (EA), 64.3 for vitality (V), 65.9 for mental health (MH), 81.98 for social aspects (SA), 75.6 for pain (P) and 68.1 for general health status (GHS). In addition, there were no radiographic signs of instability of the operated vertebral segment in the radiographic evaluation. Conclusion: The decompression of the lumbar spinal canal using the spinous process separation technique showed good results in the evaluated patients three years after the operation. Level of Evidence II, Retrospective Comparative Study.

Resumo: Objetivo: A técnica de separação do processo espinhoso é uma técnica cirúrgica menos invasiva para o tratamento da estenose do canal lombar. O objetivo é avaliar os resultados dessa técnica no tratamento da estenose do canal lombar. Método: Trinta pacientes portadores de estenose do canal vertebral lombar foram submetidos ao tratamento cirúrgico por meio da técnica da separação do processo espinhoso, tendo sido avaliados no período de três anos de pós-operatório, por meio da escala de dor e de trabalho de Denis, pelo questionário SF-36 e avaliação radiográfica do segmento operado. Resultados: Na avaliação da escala de dor de Denis, 21 (70%) pacientes não apresentavam dor (P1) e nove (30%) pacientes relataram dor mínima lombar, não necessitando medicação (P2). A escala de trabalho de Denis evidenciou que nove (30%) pacientes apresentavam restrições ao retorno à atividade prévia de trabalho (W2) e 21 (70%) pacientes foram classificados como W1. O questionário SF-36 apresentou resultados 81,25 para aspectos físicos (AF), 81,9 para capacidade funcional (CF), 81,3 para aspectos emocionais (AE), 64,3 para vitalidade(V), 65,9 para saúde mental (SM), 81,98 para aspectos sociais (AS), 75,6 para dor (D) e 68,1 para estado geral de saúde (EGS). Não foram observados sinais radiográficos de instabilidade do segmento vertebral operado na avaliação radiográfica. Conclusão: A descompressão do canal vertebral lombar por meio da técnica de separação do processo espinhoso apresentou bons resultados na avaliação num período de três anos de pós-operatório dos pacientes avaliados. Nível de Evidência II, Estudo Retrospectivo Comparativo.

Resumen: Objetivo: La técnica de separación de la apófisis espinosa es una técnica quirúrgica menos invasiva para el tratamiento de la estenosis del canal lumbar. El objetivo es evaluar los resultados de esta técnica en el tratamiento de la estenosis del canal lumbar. Método: Treinta pacientes con estenosis del conducto raquídeo lumbar fueron intervenidos quirúrgicamente mediante la técnica de separación de la apófisis espinosa, y fueron evaluados en el postoperatorio de tres años mediante la Escala de Dolor y Trabajo de Denis, mediante el cuestionario SF-36 y evaluación radiográfica del segmento operado. Resultados: En la evaluación de la escala de dolor de Denis, 21 (70%) pacientes no presentaron dolor (P1) y nueve (30%) pacientes refirieron dolor lumbar mínimo, sin necesidad de medicación (P2). La escala de trabajo de Denis mostró que nueve (30%) pacientes tenían restricciones para regresar a su actividad laboral anterior (W2) y 21 (70%) pacientes fueron clasificados como W1. El cuestionario SF-36 arrojó resultados 81,25 para aspectos físicos (AF), 81,9 para capacidad funcional (CF), 81,3 para aspectos emocionales (AE), 64,3 para vitalidad (V), 65,9 para salud mental (SM), 81,98 para aspectos sociales (AS), 75,6 para dolor (D) y 68,1 para estado general de salud (EGS). No hubo signos radiográficos de inestabilidad del segmento vertebral intervenido en la evaluación radiográfica. Conclusión: La descompresión del canal espinal lumbar mediante la técnica de separación de apófisis espinosa mostró buenos resultados en la evaluación de un período de 3 años después de la operación de los pacientes evaluados.

Evaluation of symptomatic degenerative lumbar stenosis with probable determining factors / Avaliação da estenose lombar degenerativa sintomática com fatores determinantes prováveis / Evaluación de la estenosis lumbar degenerativa sintomática con probables factores determinantes

ABSTRACT Objective: To evaluate degenerative lumbar stenosis in symptomatic patients submitted to surgeryand the correlation between probable determining factors. Methods: A retrospective descriptive study in which themagnetic resonance images of 73 patients with degenerative stenosis,who underwent surgeries involving 141 levels performed by a single surgeon at the Hospital Ortopédico de Passo Fundo from 2015 to 2018, were evaluated. The patients were stratified by the degree of facet tropism, facet arthrosis, disc degeneration, and operated side, as well as by epidemiological data such as age, sex, etc. Tropism was measured using the Karacan method and evaluated numerically and categorically. Disc degeneration was classified by Pfirrmann and facet arthrosis by Weishaupt. To analyze and obtain the results, the Chi-square test and ANOVA were used with the SPSS statistical program, version 18.0. Results: Statistical significance was found in the relationship between facet tropism and disc degeneration (p=0.026) at the L4-L5 level. No correlation was found between tropism and facet arthrosis (p=0.161) or tropism and the operated side (p=0.573). Conclusion: The degree of tropism directly influences disc degeneration and greater asymmetries are related to more severe degenerations. Although tropism has not shown a statistically significant correlation with the operated side (p=0.573), it is believed that further studies should be carried out on this correlation. Level of evidence II; Retrospective study.

RESUMO Objetivo: Avaliar a estenose lombar degenerativa em pacientes sintomáticos submetidos à cirurgia, analisando a correlação entre fatores determinantes prováveis. Métodos: Estudo retrospectivo descritivo, no qual foram avaliados exames de ressonância nuclear magnética de 73 pacientes, totalizando 141 níveis com estenose degenerativa submetidos a tratamento cirúrgico por um único cirurgião do Hospital Ortopédico de Passo Fundo, de 2015 até 2018. Os pacientes foram estratificados de acordo com grau do tropismo facetário, artrose facetária, degeneração discal e lado operado, assim como com dados epidemiológicos como idade, sexo, etc. O tropismo foi aferido pelo método de Karacan e avaliado de forma numérica e categórica. A degeneração discal foi classificada por Pfirrmann e a artrose facetária por Weishaupt. Para análise e obtenção dos resultados foi utilizado o teste do qui-quadrado e ANOVA com oprograma estatístico SPSS versão 18.0. Resultados: Verificou-se significância estatística na relação entre tropismo facetário e degeneração discal (p=0,026) no nível L4-L5. Não foi encontrada correlação entre tropismo e artrose facetária (p=0,161) ou tropismo e lado operado(p=0,573). Conclusões: O grau de tropismo influencia diretamente a degeneração discal, sendo que as assimetrias maiores estão relacionadas a degenerações mais graves. Embora o tropismo não tenha demonstrado correlação estatística significativa com o lado operado (p=0,573), acredita-se que deverão ser realizados novos estudos sobre essa correlação. Nível de evidência II; Estudo retrospectivo.

RESUMEN Objetivo: Evaluar la estenosis lumbar degenerativa en pacientes sintomáticos sometidos a cirugía, analizando la correlación entre probables factores determinantes.. Métodos: Estudio retrospectivo descriptivo, en el que se evaluaronlos exámenes de resonancia magnética nuclear de 73 pacientes, totalizando 141 niveles con estenosis degenerativa sometidos a tratamiento quirúrgico por un único cirujano en el Hospital Ortopédico de Passo Fundo, de 2015 a 2018. Los pacientes fueron estratificados según elgrado de tropismo facetario, artrosis facetaria, degeneración discal y lado operado, así como con datos epidemiológicos como edad, sexo, etc. El tropismo se midió utilizando el método de Karacan y se evaluó numérica y categóricamente. La degeneración discal fue clasificada por Pfirrmann y la artrosis facetaria por Weishaupt. Para analizar y obtener los resultados se utilizó la prueba de chi-cuadrado y ANOVA a través del programa estadístico SPSS versión 18.0. Resultados: Se encontró significación estadística en la relación entre el tropismo facetario y la degeneración discal (p=0,026) en el nivel L4-L5. No se encontró correlación entre el tropismo y la artrosis facetaria (p=0,161) ni el tropismo y el lado operado (p=0,573). Conclusión: El grado de tropismo influye directamente en la degeneración discal, y las mayores asimetrías se relacionan con degeneraciones más severas. Aunque el tropismo no ha mostrado una correlación estadísticamente significativa con el lado operado (p=0,573), se cree que deberían realizarse más estudios sobre esta correlación. Nivel de evidencia II; Estudio retrospectivo.

The influence of the rib cage on the severity of thoracic spine burst fractures / Influência da caixa torácica na gravidade da fratura da coluna torácica tipo explosão / La influencia de la caja torácica en la gravedad de la fractura por estallido en la columna torácica

ABSTRACT Objective: To analyze the anatomic influence of the ribs related to the severity of thoracic spine burst fractures. Methods: A retrospective review of 28 patients with thoracic spine burst fractures hospitalized by the Spine Group of the Hospital Ortopédico de Passo Fundo between January 2002 and December 2016 was conducted. The kyphosis, vertebral collapse, and narrowing of the vertebral canal measurements were compared between patients who had fractures at the true and false rib levels (T1 to T10) and those with fractures at the floating rib levels (T11 to T12). Results: The kyphosis, vertebral collapse, and narrowing of the vertebral canal values, measured only for vertebrae pertaining to the rib cage, were low. In addition, there were no statistically significant differences between the measurements of the group of patients with fractures at the level of the true and false ribs (T1 to T10) and the group of patients whose fractures were at the level of the floating ribs (T11 and T12). Conclusion: The differences between the traumatic structural changes in the vertebrae with true and false ribs (T1 to T10) and the vertebrae with floating ribs (T11 and T12) were not significant in the present study. Level of Evidence II; Retrospective study.

RESUMO Objetivo: Analisar a influência anatômica das costelas sobre a gravidade das fraturas da coluna torácica tipo explosão. Métodos: Foi realizada uma revisão retrospectiva de 28 pacientes com fratura tipo explosão na coluna torácica, internados no período compreendido entre janeiro de 2002 a dezembro de 2016 pelo Grupo de Coluna do Hospital Ortopédico de Passo Fundo . As mensurações de cifose, colapso vertebral e estreitamento do canal vertebral foram comparadas entre os pacientes que apresentavam fraturas no nível das costelas verdadeiras ou falsas (T1 a T10) e aqueles com fraturas no nível das costelas flutuantes (T11 a T12). Resultados: Os valores da cifose, colapso vertebral e estreitamento do canal vertebral, mensurados apenas nas vértebras pertencentes à caixa torácica, mostraram-se baixos. Além disso, as mensurações não apresentaram diferenças estatísticas significativas quando foram comparados os grupos de pacientes que apresentavam fraturas no nível das costelas verdadeiras ou falsas (T1 a T10) com aqueles cujas fraturas eram no nível das costelas flutuantes (T11 e T12). Conclusões: As diferenças entre as alterações estruturais traumáticas nas vértebras com costelas verdadeiras e falsas (T1 a T10) e as vértebras com costelas flutuantes (T11 e T12) não foram significativas no presente estudo. Nível de Evidência II; Estudo retrospectivo.

RESUMEN Objetivo: Analizar la influencia anatómica de las costillas con respecto a la gravedad de las fracturas de la columna torácica por estallido. Métodos: Se realizó una revisión retrospectiva de 28 pacientes con fractura de columna torácica por estallido, ingresados en el período comprendido entre enero de 2002 y diciembre de 2016 por el Grupo de Columna del Hospital Ortopédico de Passo Fundo. Se compararon las medidas de cifosis, colapso vertebral y estrechamiento del conducto vertebral entre los pacientes que presentaban fracturas a nivel de las costillas verdaderas o falsas (T1 a T10) y aquellos con fracturas a nivel de las costillas flotantes (T11 a T12). Resultados: Los valores de cifosis, colapso vertebral y estrechamiento del conducto vertebral, medidos solamente en las vértebras pertenecientes a la caja torácica, se mostraron bajos. Además, las mediciones no presentaron diferencias estadísticamente significativas al comparar los grupos de pacientes que presentaban fracturas a nivel de las costillas verdaderas o falsas (T1 a T10) con aquellos cuyas fracturas estaban a nivel de las costillas flotantes (T11 a T12). Conclusiones: Las diferencias entre los cambios estructurales traumáticos en las vértebras con costillas verdaderas y falsas (T1 a T10) y las vértebras con costillas flotantes (T11 y T12) no fueron significativas en el presente estudio. Nivel de Evidencia II; Estudio retrospectivo.

Facet joint degeneration in patients with lumbar disc herniation and probable determining factors / Degeneração facetária em pacientes com hérnia de disco lombar e prováveis fatores determinantes / Degeneración facetaria en pacientes con hernia de disco lumbar y probables factores determinantes

ABSTRACT Objective To evaluate facet joint degeneration following surgical treatment in patients with lumbar disc herniation, seeking to correlate it with possible determining factors. Methods Cross-sectional observational study, which analyzed medical records, radiographs and magnetic resonance images of 287 patients with lumbar disc herniation treated surgically at the Spine Surgery Service of the Hospital Ortopédico de Passo Fundo. Information about age and sex was collected. In the imaging exams, the following variables were evaluated: facet joint angulation and its tropism, measured by the Karacan method, sacral slope and lumbar lordosis, measured by the Cobb method, arthrosis of the interfacetary joints, measured by the Weishaupt classification, and intervertebral disc degeneration, measured by the Pfirrmann classification. Results A statistically significant relationship was observed between facet joint degeneration and age (p = 0.002), and also between facet joint degeneration and sacral slope (p = 0.038). No correlation was found between facet joint degeneration and lumbar lordosis (p = 0.934). It was found that the most degenerated facet joints were those that had the greatest facet joint asymmetry (tropism). However, the mean degree of facet tropism did not increase homogeneously with the progression of the joint degeneration score (p = 0.380). Conclusion It was verified that there are, in fact, a multiplicity of factors related to the degree of facet joint degeneration in the low lumbar spine. Additional studies, correlated with the asymmetry of the facet joints, would be important to elucidate better preventive management of this degeneration, aiming to avert secondary low back pain and sciatica with advancing age. Level of evidence II; Retrospective study.

RESUMO Objetivo Avaliar a degeneração facetária em pacientes com hérnia de disco lombar tratados cirurgicamente, procurando correlacioná-la com possíveis fatores determinantes. Métodos Estudo observacional do tipo transversal, que analisou prontuários, radiografias e ressonâncias magnéticas de 287 pacientes com hérnia de disco lombar, tratados cirurgicamente no Serviço de Cirurgia da Coluna do Hospital Ortopédico de Passo Fundo. Foram coletadas informações sobre idade e sexo. Nos exames de imagem, foram avaliadas as seguintes variáveis: angulação facetária e seu tropismo, mensurada pelo método de Karacan, inclinação sacral e lordose lombar, medidas pelo método de Cobb, artrose das articulações interfacetárias, pela classificação de Weishaupt e degeneração do disco intervertebral, pela classificação de Pfirrmann. Resultados Foi verificada relação estatisticamente significativa entre degeneração facetária e idade (p = 0,002), assim como entre degeneração facetária e inclinação sacral (p = 0,038). Não foi encontrada correlação entre degeneração facetária e lordose lombar (p = 0,934). Constatou-se que as articulações facetárias mais degeneradas eram as que tinham maior assimetria facetária (tropismo). Porém, a média do grau de tropismo facetário não aumentou de forma homogênea com a progressão do escore de degeneração da articulação (p = 0,380). Conclusões Verificou-se que há, de fato, uma multiplicidade de fatores relacionados com o grau de degeneração facetária da coluna lombar baixa. Estudos adicionais correlacionados com a assimetria das referidas articulações seriam importantes para elucidarmos uma conduta preventiva melhor para a referida degeneração, objetivando evitar lombalgia e ciatalgia secundárias à medida que a idade avança. Nível de evidência II; Estudo retrospectivo .

RESUMEN Objetivo Evaluar la degeneración facetaria en pacientes con hernia de disco lumbar tratados quirúrgicamente, buscando correlacionarla con posibles factores determinantes. Métodos Estudio observacional del tipo transversal, que analizó historiales, radiografías y resonancias magnéticas de 287 pacientes con hernia de disco lumbar, tratados quirúrgicamente en el Servicio de Cirugía de la Columna del Hospital Ortopédico de Passo Fundo. Fueron colectadas informaciones sobre edad y sexo. En los exámenes de imagen, se evaluaron las siguientes variables: angulación facetaria y su tropismo, medida por el método de Karacan, inclinación sacral y lordosis lumbar, medidas por el método de Cobb, artrosis de las articulaciones interfacetarias, por la clasificación de Weishaupt, y degeneración del disco intervertebral, por medio de la clasificación de Pfirrmann. Resultados Se verificó relación estadísticamente significativa entre degeneración facetaria y edad (p = 0,002), así como entre degeneración facetaria e inclinación sacral (p = 0,038). No se encontró correlación entre degeneración facetaria y lordosis lumbar (p = 0,934). Se constató que las articulaciones facetarias más degeneradas eran las que tenían mayor asimetría facetaria (tropismo). Sin embargo, el promedio del grado de tropismo facetario no aumentó de forma homogénea con la progresión del score de degeneración de la articulación (p = 0,380). Conclusiones Se verificó que hay, de hecho, una multiplicidad de factores relacionados con el grado de degeneración facetaria de la columna lumbar baja. Estudios adicionales correlacionados con la asimetría de las referidas articulaciones serían importantes para que elucidemos una mejor conducta preventiva para la referida degeneración, con el objetivo de evitar lumbalgia e ciatalgia secundarias, a medida que la edad avanza. Nivel de evidencia II; Estudio retrospectivo.

Caffeine and high intensity exercise: Impact on purinergic and cholinergic signalling in lymphocytes and on cytokine levels.

This study evaluated the effects of caffeine in combination with high-intensity interval training (HIIT) on sensitivity to glucocorticoids and proliferation of lymphocytes, IL-6 and IL-10 levels and NTPDase, adenosine deaminase (ADA) and acetylcholinesterase (AChE) activity in rat lymphocytes. The animals were divided into groups: control, caffeine 4 mg/kg, caffeine 8 mg/kg, HIIT, HIIT plus caffeine 4 mg/kg and HIIT plus caffeine 8 mg/kg. The rats were trained three times a week for 6 weeks for a total workload 23% of body weight at the end of the experiment. Caffeine was administered orally 30 min before the training session. When lymphocytes were stimulated with phytohaemagglutinin no changes were observed in proliferative response between trained and sedentary animals; however, when caffeine was associated with HIIT an increase in T lymphocyte proliferation and in the sensitivity of lymphocytes to glucocorticoids occurred. ATP and ADP hydrolysis was decreased in the lymphocytes of the animals only trained and caffeine treatment prevented alterations in ATP hydrolysis. HIIT caused an increase in the ADA and AChE activity in lymphocytes and this effect was more pronounced in rats trained and supplemented with caffeine. The level of IL-6 was increased while the level of IL-10 was decreased in trained animals (HIIT) and caffeine was capable of preventing this exercise effect. Our findings suggest that caffeine ingestion attenuates, as least in part, the immune and inflammatory alterations following a prolonged HIIT protocol.

Influence of facet tropism on the location of lumbar disc herniation / A influência do tropismo facetário sobre a localização da hérnia discal lombar / Influencia del tropismo facetario en la ubicación de la hernia de disco lumbar

ABSTRACT Objective: To correlate facet tropism with the side and location of the intervertebral disc in which the lumbar disc herniation occurred. Methods: A retrospective descriptive study that evaluated Magnetic Resonance Imaging of 255 patients with lumbar disc herniation undergoing surgical treatment with the Spine Group of the Hospital Ortopédico de Passo Fundo between 2002 and 2014. The total patient number was stratified according to the side affected by the herniated disc (right or left), location of the hernia in the intervertebral disc (central, centrolateral, foraminal and extraforaminal) and demographic data, such as age, gender etc. The degree of facet joint tropism was measured by the Karakan method and classified as mild (difference less than 7º); moderate (between 7º and 15º) and severe (difference greater than 15º). Results: A statistical significant relationship (p= 0.023) was observed between the facet joint tropism and the side where the lumbar disc herniation occurred. No correlation was found between facet joint tropism and location of the herniation on the intervertebral disc. Conclusions: The degree of facet tropism presents a statistical significant correlation with the side of the intervertebral disc in which the lumbar disc herniation will develop. Level of Evidence: II. Type of study: Retrospective study.

RESUMO Objetivo: Correlacionar o tropismo facetário com o lado e local do disco intervertebral no qual ocorreu a hérnia discal lombar. Métodos: Estudo retrospectivo descritivo, no qual foram avaliados exames de Ressonância Nuclear Magnética de 255 pacientes com hérnia discal lombar submetidos a tratamento cirúrgico pelo Grupo de Coluna do Hospital Ortopédico de Passo Fundo, entre os anos de 2002 e 2014. Estratificou-se o total de pacientes pelo lado acometido pela hérnia discal (direito ou esquerdo), localização da hérnia no disco intervertebral (central, centro-lateral, foraminal e extra-foraminal) e por dados epidemiológicos, como idade, sexo etc. O grau de tropismo facetário foi mensurado pelo método de Karakan e classificado entre leve (diferença menor que 7º), moderado (entre 7º e 15º) e grave (diferença maior que 15º). Resultados: Foi verificada relação estatisticamente significativa (p= 0,023) entre o tropismo facetário e o lado em que ocorreu a hérnia discal lombar. Não foi encontrada correlação entre tropismo facetário e localização da hérnia discal no disco intervertebral. Conclusão: O grau de tropismo facetário apresenta correlação estatisticamente significativa com o lado do disco intervertebral no qual irá se desenvolver a hérnia discal. Nível de Evidência: II. Tipo de Estudo: Estudo retrospectivo.

RESUMEN Objetivo: Correlacionar el tropismo facetario con el lado y local del disco intervertebral en el cual ocurrió la hernia del disco lumbar. Métodos: Estudio retrospectivo descriptivo, en el fueron evaluados exámenes de resonancia magnética nuclear de 255 pacientes con hernia discal lumbar sometidos a tratamiento quirúrgico por el Grupo de Columna Vertebral del Hospital Ortopédico de Passo Fundo, entre los años 2002 y 2014. El número total de pacientes fue estratificado de acuerdo con el lado acometido por la hernia discal (izquierda o derecha), localización de la hernia en el disco intervertebral (central, centro-lateral, foraminal o extra-foraminal) y datos epidemiológicos como edad, sexo etc. El grado de tropismo facetario fue medido por el método de Karakan y clasificado como leve (diferencia menor que 7º), moderado (entre 7º y 15º) y grave (diferencia mayor que 15º). Resultados: Se verificó una relación estadísticamente significativa (p = 0,023) entre el tropismo facetario y el lado en que ocurrió la hernia discal lumbar. No se encontró correlación entre el tropismo facetario y la localización de la hernia en el disco intervertebral. Conclusiones: El grado de tropismo facetario presenta correlación estadísticamente significativa con el lado del disco intervertebral en el cual se desarrollará la hernia discal lumbar. Nivel de evidencia: II. Tipo de Estudio: Estudio retrospectivo.

Caffeine prevents high-intensity exercise-induced increase in enzymatic antioxidant and Na+-K+-ATPase activities and reduction of anxiolytic like-behaviour in rats.

OBJECTIVE: Here we investigated the impact of chronic high-intensity interval training (HIIT) and caffeine consumption on the activities of Na+-K+-ATPase and enzymes of the antioxidant system, as well as anxiolytic-like behaviour in the rat brain. METHODS: Animals were divided into groups: control, caffeine (4 mg/kg), caffeine (8 mg/kg), HIIT, HIIT plus caffeine (4 mg/kg) and HIIT plus caffeine (8 mg/kg). Rats were trained three times per week for 6 weeks, and caffeine was administered 30 minutes before training. We assessed the anxiolytic-like behaviour, Na+-K+-ATPase, superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) activities, levels of reduced glutathione (GSH) and thiobarbituric acid reactive substances (TBARS) in the brain. RESULTS AND DISCUSSION: HIIT-induced anxiolytic-like behaviour increased Na+-K+-ATPase and GPx activities and TBARS levels, altered the activities of SOD and CAT in different brain regions, and decreased GSH levels. Caffeine, however, elicited anxiogenic-like behaviour and blocked HIIT effects. The combination of caffeine and HIIT prevented the increase in SOD activity in the cerebral cortex and GPx activity in three brain regions. Our results show that caffeine promoted anxiogenic behaviour and prevented HIIT-induced changes in the antioxidant system and Na+-K+-ATPase activities.

Caffeine prevents changes in muscle caused by high-intensity interval training.

The use of ergogenic substances such as caffeine has become a strategy to enhance sports performance. In the present study we evaluated the effects of high-intensity interval training (HIIT) associated with caffeine intake on acetylcholinesterase (AChE) and Ca2+ATPase activity and glycogen levels in the muscles of rats were evaluated. The animals were divided in groups: control, caffeine 4 or 8mg/kg, HIIT, HIIT plus caffeine 4 or caffeine 8mg/kg. Our results showed a decrease in glycogen levels in muscle in all trained groups after acute session exercise, while that an increase in glycogen levels was observed in all groups in relation to control in chronic exercise protocol. HIIT increases the thickness of the left ventricle and the Ca2+-ATPase activity and decrease the AChE activity in gastrocnemius muscle. Caffeine treatment prevents changes in enzymes activities as well as left ventricular hypertrophy adaptation induced by HIIT. Our findings suggest that caffeine modulates crucial pathways for muscle contraction in HIIT.

Anthocyanins control neuroinflammation and consequent memory dysfunction in mice exposed to lipopolysaccharide.

Peripheral inflammatory stimuli may activate a brain neuroinflammatory processes with consequences in brain function. The present study investigated if anthocyanins (ANT) consumption was able to prevent the memory loss, the neuronal damage, and the neuroinflammatory processes triggered by the intraperitoneal lipopolysaccharide (LPS) administration. C57BL6 male mice were treated with ANT (30-100 mg/kg by gavage). With a single dose or during 10 days, before be challenged with LPS (250 µg/kg intraperitoneally single administration), a classical inductor of inflammation. The data obtained showed that ANT was able to confer protection against the memory impairment after 10 days of ANT treatment (100 mg/kg). This phytonutrient also prevented the hypothermia episode induced by LPS. Moreover, ANT prevented the increase in protein carbonyl, NOx, and MDA levels in the hippocampus and cerebral cortex (4 and 24 h) in animal challenged with LPS. ANT showed a protective effect on the increase in the pro-inflammatory cytokines content, especially Interleukin (IL)-1ß, tumoral necrosis factor-α and on the reduction of IL-10 induced by LPS. ANT 100 mg/kg prevented the infiltration of peripheral immune cells in the hippocampus at 24 h post-LPS administration. In parallel, LPS increased the activity of myeloperoxidase in cortex and hippocampus, and ANT prevented this effect, also reducing microglia (Iba-1) and astrocyte (GFAP) immunoreactivity. Thus, our data support that ANT are a promising therapeutic component against brain disorders associated with process of neuroinflammation. Graphical Abstract ᅟ.

Thoracolumbar burst fracture: structural changes and clinical outcome of treatment / Fratura toracolombar tipo explosão: alterações estruturais e resultado clínico do tratamento / Fractura toracolumbar tipo explosión: cambios estructurales y resultados clínico del tratamiento

ABSTRACT Objective: To evaluate the correlation between structural changes in burst fractures of thoracic and lumbar spine with clinical outcome of the treatment. Methods: A retrospective study in 25 patients with fractures of thoracic and lumbar spine burst fractures without neurological deficit. Eleven patients underwent conservative treatment and for the remaining the treatment was surgical. All patients were followed up for at least 24 months. The cases were evaluated by a protocol that included: posttraumatic measurement of kyphosis, vertebral body collapse and narrowing of the spinal canal, the visual analog scale of pain, and the quality of life questionnaire SF-36 at the follow-up. For statistical analysis, the significance level was 5% and the software SPSS 18.0 was used. Results: No statistically significant difference was observed when comparing the clinical outcomes of one treatment over another. Similarly, there was no statistically significant correlation between kyphosis and post-traumatic narrowing of the spinal canal with clinical worsening in the follow-up, regardless of the treatment used. We found a positive correlation (p<0.05) between initial collapse and SF-36 domains in both groups (operated and non-operated). Conclusion: There was no significant superiority of one treatment over the other, and no correlation was found between kyphosis and spinal canal narrowing in burst fractures of the thoracic and lumbar spine without neurological deficit. However, there was correlation between initial collapse and clinical outcome in some domains of the SF-36 questionnaire.

RESUMO Objetivo: Avaliar a correlação entre as alterações estruturais das fraturas da coluna torácica e lombar tipo explosão com o resultado clínico do tratamento. Métodos: Foi realizado estudo retrospectivo em 25 pacientes, com fraturas da coluna torácica ou lombar tipo explosão sem déficit neurológico. Onze pacientes foram submetidos ao tratamento conservador e, nos demais, o tratamento foi cirúrgico. Todos os pacientes foram acompanhados por, no mínimo, 24 meses. Os casos foram avaliados por um protocolo que incluiu: aferição pós-traumática da cifose, colapso do corpo vertebral e estreitamento do canal vertebral e escala visual analógica de dor e questionário de qualidade de vida SF-36 no seguimento. Para a análise estatística dos resultados foi considerado nível de significância de 5% e utilizou-se o programa PASW 18.0. Resultados: Não foi evidenciada diferença estatisticamente significativa ao comparar os resultados clínicos de um tratamento sobre outro. Da mesma forma, não houve correlação estatisticamente significativa entre cifose e estreitamento pós-traumático do canal vertebral com piora clínica no seguimento, independentemente do tipo de tratamento adotado. Encontramos correlação positiva (p < 0,05), entre colapso inicial e domínios do SF36 em ambos os grupos (operados e não operados). Conclusão: Não foi evidenciada superioridade de um tratamento sobre o outro, assim como não foi encontrada correlação entre cifose e estreitamento do canal vertebral nas fraturas da coluna torácica e lombar tipo explosão sem déficit neurológico. Porém, verificou-se correlação entre colapso inicial e desfecho clínico em alguns domínios do questionário SF36.

RESUMEN Objetivo: Evaluar la correlación entre los cambios estructurales en las fracturas de la columna vertebral torácica y lumbar del tipo explosión con el resultado clínico del tratamiento. Métodos: Estudio retrospectivo de 25 pacientes con fracturas de la columna vertebral lumbar o torácica de tipo explosión y sin déficit neurológico. Once pacientes fueron sometidos a tratamiento conservador y en los demás, el tratamiento fue quirúrgico. Todos los pacientes tuvieron seguimiento mínimo de 24 meses. Los casos fueron evaluados por un protocolo que incluyó: evaluación de la cifosis postraumática, colapso del cuerpo vertebral y el estrechamiento del canal espinal y la escala analógica visual de dolor y el cuestionario SF-36 durante el seguimiento. Para el análisis estadístico, se consideró el nivel de significación del 5% y se utilizó el programa PASW 18.0. Resultados: No se observaron diferencias estadísticamente significativas al comparar los resultados clínicos de un tratamiento sobre otro. También no hubo correlación estadísticamente significativa entre la cifosis y estrechamiento postraumático de canal espinal con empeoramiento clínico en el seguimiento, sin importar el tratamiento utilizado. Se encontró una correlación positiva (p < 0,05) entre el colapso inicial y dominios SF36 en ambos grupos (operados y no operados). Conclusión: No hubo superioridad significativa de un tratamiento sobre el otro y no se encontró correlación entre la cifosis y estrechamiento del canal espinal en las fracturas de la columna torácica o lumbar del tipo explosión sin déficit neurológico. Sin embargo, hubo correlación entre el colapso inicial y el resultado clínico en algunos dominios del cuestionario SF36.

Protective effect of rosmarinic acid against oxidative stress biomarkers in liver and kidney of strepotozotocin-induced diabetic rats

In the present study, we investigated the efficiency of rosmarinic acid (RA) in preventing the alteration of oxidative parameters in the liver and kidney of diabetic rats induced by streptozotocin (STZ). The animals were divided into six groups (n = 8): control, ethanol, RA 10 mg/kg, diabetic, diabetic/ethanol, and diabetic/RA 10 mg/kg. After 3 weeks of treatment, we found that TBARS levels in liver and kidney were significantly increased in the diabetic/saline group and the administration of RA prevented this increase in the liver and kidney (P < 0.05). Diabetes caused a significant decrease in the activity of superoxide dismutase (SOD) and catalase (CAT) in the diabetes/saline group (P < 0.05). However, the treatment with 10 mg/kg RA (antioxidant) prevented this alteration in SOD and CAT activity in the diabetic RA group (P < 0.05). In addition, RA reverses the decrease in ascorbic acid and non-protein-thiol (NPSH) levels in diabetic rats. The treatment with RA also prevented the decrease in the Delta-aminolevulinic acid dehydratase (ALA-D) activity in the liver and kidney of diabetic rats. Furthermore, RA did not have any effect on glycemic levels. These results indicate that RA effectively reduced the oxidative stress induced by STZ, suggesting that RA is a potential candidate for the prevention and treatment of pathological conditions in diabetic models

Protective effect of rosmarinic acid against oxidative stress biomarkers in liver and kidney of strepotozotocin-induced diabetic rats.

In the present study, we investigated the efficiency of rosmarinic acid (RA) in preventing the alteration of oxidative parameters in the liver and kidney of diabetic rats induced by streptozotocin (STZ). The animals were divided into six groups (n = 8): control, ethanol, RA 10 mg/kg, diabetic, diabetic/ethanol, and diabetic/RA 10 mg/kg. After 3 weeks of treatment, we found that TBARS levels in liver and kidney were significantly increased in the diabetic/saline group and the administration of RA prevented this increase in the liver and kidney (P < 0.05). Diabetes caused a significant decrease in the activity of superoxide dismutase (SOD) and catalase (CAT) in the diabetes/saline group (P < 0.05). However, the treatment with 10 mg/kg RA (antioxidant) prevented this alteration in SOD and CAT activity in the diabetic RA group (P < 0.05). In addition, RA reverses the decrease in ascorbic acid and non-protein-thiol (NPSH) levels in diabetic rats. The treatment with RA also prevented the decrease in the Delta-aminolevulinic acid dehydratase (ALA-D) activity in the liver and kidney of diabetic rats. Furthermore, RA did not have any effect on glycemic levels. These results indicate that RA effectively reduced the oxidative stress induced by STZ, suggesting that RA is a potential candidate for the prevention and treatment of pathological conditions in diabetic models.

Burst fracture of the thoracolumbar spine: correlation between kyphosis and clinical result of the treatment / Fratura da coluna toracolombar tipo explosão: correlação entre cifose e resultado clínico do tratamento / Fractura de la columna toracolumbar del tipo explosión: correlación entre cifosis y resultado clínico del tratamiento

To evaluate the correlation between kyphosis due to burst fractures of thoracic and lumbar spine and clinical outcome in patients undergoing conservative or surgical treatment.

Avaliar a correlação entre cifose decorrente de fratura tipo explosão da coluna torácica e lombar e desfecho clínico em pacientes submetidos a tratamento conservador ou cirúrgico.

Evaluar la correlación entre la cifosis debido a fractura del tipo explosión de la columna torácica y lumbar y el resultado clínico en pacientes sometidos a tratamiento conservador o quirúrgico.

Vitamin D3 prevents the increase in ectonucleotidase activities and ameliorates lipid profile in type 1 diabetic rats.

This study was designed to assess the potential effect of vitamin D3 (VD3) in avoiding atherothrombosis by modulation of lipid metabolism and platelet activation in type 1 diabetic rats. Male wistar rats were divided into eight groups (n = 5-10): Control/Saline (Sal); Control/Metformin 500 mg/kg (Metf); Control/Vitamin D3 90 µg/kg (VD3); Control/Metformin 500 mg/kg + VD3 90 µg/kg (Metf + VD3); Diabetic/Saline (Sal); Diabetic/Metformin 500 mg/kg (Metf); Diabetic/Vitamin D3 90 µg/kg (VD3); Diabetic/Metformin 500 mg/kg + VD3 90 µg/kg (Metf + VD3). Treatments were administered during 30 days after diabetes induction with streptozotocin (STZ). After 31 days, the rats were euthanized and blood was collected and separated into serum and platelets, both used for lipid profile and ectonucleotidase activity assays, respectively. Ectonucleoside triphosphate phosphohydrolase (E-NTPDase), ectonucleotide pyrophosphatase/phosphodiesterase (E-NPP), and 5'-nucleotidase and adenosine deaminase (E-ADA) were significantly higher in the Diabetic than in Control group. Treatment with Metf and/or VD3 prevented the increase in NTPDase and E-NPP activities in diabetic rats. Only Metf + VD3 significantly prevented the increase in 5'-nucleotidase. VD3 alone, but not Metf, prevented the increase in ADA activity when compared to saline-treated diabetic rats. Treatment of rats with VD3, Metf, and Metf + VD3 was also effective in the prevention of lipid metabolism disorder in diabetic and was able to ameliorate lipid metabolism in non-diabetic rats. These results provide evidence for the potential of Metf and VD3 in the treatment of platelet dysfunction and lipid metabolism impairment in T1D, which may be important in the control and prevention of atherothrombosis in diabetes.

Anthocyanins suppress the secretion of proinflammatory mediators and oxidative stress, and restore ion pump activities in demyelination.

The aim of this study was to investigate the protective effect of anthocyanins (ANT) on oxidative and inflammatory parameters, as well as ion pump activities, in the pons of rats experimentally demyelinated with ethidium bromide (EB). Rats were divided in six groups: control, ANT 30 mg/kg, ANT 100 mg/kg, EB (0.1%), EB plus ANT 30 mg/kg and EB plus ANT 100 mg/kg. The EB cistern pons injection occurred on the first day. On day 7, there was a peak in the demyelination. During the 7 days, the animals were treated once per day with vehicle or ANT. It was observed that demyelination reduced Na(+),K(+)-ATPase and Ca(2+)-ATPase activities and increased 4-hydroxynonenal, malondialdehyde, protein carbonyl and NO2plus NO3 levels. In addition, a depletion of glutathione reduced level/nonprotein thiol content and a decrease in superoxide dismutase activity were also seen. The dose of 100 mg/kg showed a better dose-response to the protective effects. The demyelination did not affect the neuronal viability but did increase the inflammatory infiltrate (myeloperoxidase activity) followed by an elevation in interleukin (IL)-1ß, IL-6, tumor necrosis factor-α and interferon-γ levels. ANT promoted a reduction in cellular infiltration and proinflammatory mediators. Furthermore, ANT restored the levels of IL-10. Luxol fast blue staining confirmed the loss of myelin in the EB group and the protective effect of ANT 100 mg/kg. In conclusion, this study was the first to show that ANT are able to restore ion pump activities and protect cellular components against the inflammatory and oxidative damages induced by demyelination.

Alterations in the extracellular catabolism of nucleotides and platelet aggregation induced by high-fat diet in rats: effects of alpha-tocopherol

The aim of this study was to assess whether alfa-tocopherol administration prevented alterations in the ectonucleotidase activities and platelet aggregation induced by high-fat diet in rats. Thus, we examined four groups of male rats which received standard diet, high-fat diet (HFD), α-tocopherol (α-Toc), and high-fat diet plus α-tocopherol. HFD was administered ad libitum and α-Toc by gavage using a dose of 50 mg/kg. After 3 months of treatment, animals were submitted to euthanasia, and blood samples were collected for biochemical assays. Results demonstrate that NTPDase, ectonucleotide pyrophosphatase/phosphodiesterase, and 5'-nucleotidase activities were significantly decreased in platelets of HFD group, while that adenosine deaminase (ADA) activity was significantly increased in this group in comparison to the other groups (P < 0.05). When rats that received HFD were treated with α-Toc, the activities of these enzymes were similar to the control, but ADA activity was significantly increased in relation to the control and α-Toc group (P < 0.05). HFD group showed an increased in platelet aggregation in comparison to the other groups, and treatment with α-Toc significantly reduced platelet aggregation in this group. These findings demonstrated that HFD alters platelet aggregation and purinergic signaling in the platelets and that treatment with α-Toc was capable of modulating the adenine nucleotide hydrolysis in this experimental condition

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Alterations in the extracellular catabolism of nucleotides and platelet aggregation induced by high-fat diet in rats: effects of α-tocopherol.

The aim of this study was to assess whether α-tocopherol administration prevented alterations in the ectonucleotidase activities and platelet aggregation induced by high-fat diet in rats. Thus, we examined four groups of male rats which received standard diet, high-fat diet (HFD), α-tocopherol (α-Toc), and high-fat diet plus α-tocopherol. HFD was administered ad libitum and α-Toc by gavage using a dose of 50 mg/kg. After 3 months of treatment, animals were submitted to euthanasia, and blood samples were collected for biochemical assays. Results demonstrate that NTPDase, ectonucleotide pyrophosphatase/phosphodiesterase, and 5'-nucleotidase activities were significantly decreased in platelets of HFD group, while that adenosine deaminase (ADA) activity was significantly increased in this group in comparison to the other groups (P < 0.05). When rats that received HFD were treated with α-Toc, the activities of these enzymes were similar to the control, but ADA activity was significantly increased in relation to the control and α-Toc group (P < 0.05). HFD group showed an increased in platelet aggregation in comparison to the other groups, and treatment with α-Toc significantly reduced platelet aggregation in this group. These findings demonstrated that HFD alters platelet aggregation and purinergic signaling in the platelets and that treatment with α-Toc was capable of modulating the adenine nucleotide hydrolysis in this experimental condition.

Neuroprotective effect of anthocyanins on acetylcholinesterase activity and attenuation of scopolamine-induced amnesia in rats.

Anthocyanins are a group of natural phenolic compounds responsible for the color to plants and fruits. These compounds might have beneficial effects on memory and have antioxidant properties. In the present study we have investigated the therapeutic efficacy of anthocyanins in an animal model of cognitive deficits, associated to Alzheimer's disease, induced by scopolamine. We evaluated whether anthocyanins protect the effects caused by SCO on nitrite/nitrate (NOx) levels and Na(+),K(+)-ATPase and Ca(2+)-ATPase and acetylcholinesterase (AChE) activities in the cerebral cortex and hippocampus (of rats. We used 4 different groups of animals: control (CTRL), anthocyanins treated (ANT), scopolamine-challenged (SCO), and scopolamine+anthocyanins (SCO+ANT). After seven days of treatment with ANT (200mgkg(-1); oral), the animals were SCO injected (1mgkg(-1); IP) and were performed the behavior tests, and submitted to euthanasia. A memory deficit was found in SCO group, but ANT treatment prevented this impairment of memory (P<0.05). The ANT treatment per se had an anxiolytic effect. AChE activity was increased in both in cortex and hippocampus of SCO group, this effect was significantly attenuated by ANT (P<0.05). SCO decreased Na(+),K(+)-ATPase and Ca(2+)-ATPase activities in hippocampus, and ANT was able to significantly (P<0.05) prevent these effects. No significant alteration was found on NOx levels among the groups. In conclusion, the ANT is able to regulate cholinergic neurotransmission and restore the Na(+),K(+)-ATPase and Ca(2+)-ATPase activities, and also prevented memory deficits caused by scopolamine administration.

Rosmarinic acid prevents lipid peroxidation and increase in acetylcholinesterase activity in brain of streptozotocin-induced diabetic rats.

We investigated the efficacy of rosmarinic acid (RA) in preventing lipid peroxidation and increased activity of acetylcholinesterase (AChE) in the brain of streptozotocin-induced diabetic rats. The animals were divided into six groups (n = 8): control, ethanol, RA 10 mg/kg, diabetic, diabetic/ethanol and diabetic/RA 10 mg/kg. After 21 days of treatment with RA, the cerebral structures (striatum, cortex and hippocampus) were removed for experimental assays. The results demonstrated that the treatment with RA (10 mg/kg) significantly reduced the level of lipid peroxidation in hippocampus (28%), cortex (38%) and striatum (47%) of diabetic rats when compared with the control. In addition, it was found that hyperglycaemia caused significant increased in the activity of AChE in hippocampus (58%), cortex (46%) and striatum (30%) in comparison with the control. On the other hand, the treatment with RA reversed this effect to the level of control after 3 weeks. In conclusion, the present findings showed that treatment with RA prevents the lipid peroxidation and consequently the increase in AChE activity in diabetic rats, demonstrating that this compound can modulate cholinergic neurotransmission and prevent damage oxidative in brain in the diabetic state. Thus, we can suggest that RA could be a promising compound in the complementary therapy in diabetes.

Differential speed of activation in antioxidant system in three oat genotypes.

The objective of this study was to evaluate whether the oxidative stress caused by aluminum (Al) toxicity is a symptom that can trigger root growth inhibition in oat genotype seedlings. Oat seedlings were grown in a nutrient solution (pH 4.0) with 0 and 370 µM Al. At 12, 24, and 36 h after Al addition, growth (root length) and biochemical parameters (catalase - CAT, ascorbate peroxidase - APX, and superoxide dismutase - SOD activities, lipid peroxidation, ascorbic acid (ASA) and non-protein thiol group (NPSH) concentration) were determined. The aluminum content was measured in oat seedlings. Regardless of the exposure time, root of the tolerant genotype grew normally with any Al treatments. Al supply caused lipid peroxidation only in the Al-sensitive genotype in roots and shoots (at 12, 24, and 36 h). In sensitive genotype seedlings, CAT, APX, and SOD were activated only at 24 or 36 h. In tolerant and intermediate genotypes, CAT, APX, and SOD were activated at 12, 24, and 36 h. Data for root growth and lipid peroxidation suggested that lipid peroxidation in the sensitive genotype may be an effect of Al toxicity on root growth. Therefore, the tolerant, intermediate, and sensitive genotypes differ in the expression of the amount, type of antioxidants, and speed of activation of antioxidant system, suggesting a varying capacity of these genotypes to deal with oxidative stress, which resulted in varying sensitivity and tolerance to Al.