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OBJECTIVE: to evaluate the effects of arginine on abdominal wall healing in rats. METHODS: we submitted 20 Wistar rats to laparotomy and divided them into two groups, arginine and control, which then received, respectively, daily intraperitoneal treatment with arginine (300mg/kg/day) and weight-equivalent phosphate buffered solution, during five days. On the seventh postoperative day, we collected blood and scar wall samples from both groups. We evaluated serum nitrate and nitrite levels, wound evolution by tissue hydroxyproline dosages, granulation tissue formation, percentage of mature and immature collagen, myofibroblast density and angiogenesis. We used the ANOVA and the Student's t tests with p=0.05 for comparisons between groups. RESULTS: there were no significant differences between the groups studied for nitrate and nitrite (p=0.9903), tissue hydroxyproline (p=0.1315) and myofibroblast density (p=0.0511). The arginine group presented higher microvascular density (p=0.0008), higher percentage of type I collagen (p=0.0064) and improved granulation tissue formation, with better angiofibroblastic proliferation rates (p=0.0007) and wound edge reepithelization (p=0.0074). CONCLUSION: in the abdominal wall healing evaluation of Wistar rats under arginine treatment, there was no change in serum nitrate and nitrite levels, total collagen deposition and myofibroblast density. There was an increase in type I collagen maturation, microvascular density and improvement in scar granulation tissue formation by better edge reepithelization and angiofibroblastic proliferation.

OBJETIVO: avaliar os efeitos da arginina na cicatrização da parede abdominal de ratos Wistar. MÉTODOS: vinte ratos Wistar foram submetidos à laparotomia e separados em dois grupos (arginina e controle), que receberam tratamento diário por via intraperitoneal com arginina (300mg/kg/dia) e solução tampão fosfato em dose equivalente ao peso, respectivamente, durante cinco dias. No sétimo dia pós-operatório, coletaram-se amostras de sangue e da cicatriz da parede abdominal de ambos os grupos. Avaliaram-se o nível sérico de nitratos e nitritos, a evolução cicatricial pelas dosagens de hidroxiprolina tecidual, formação de tecido de granulação, determinação da porcentagem de colágeno maduro e imaturo, densidade de miofibroblastos e angiogênese. Empregaram-se os testes de ANOVA e t de Student com p=0,05 para as comparações entre os grupos. RESULTADOS: não ocorreram diferenças significantes entre os grupos estudados para dosagens de nitratos e nitritos (p=0,9903), hidroxiprolina tecidual (p=0,1315) e densidade de miofibroblastos (p=0,0511). O grupo arginina apresentou maior densidade microvascular (p=0,0008), maior porcentagem de colágeno tipo I (p=0,0064) e melhora na formação do tecido de granulação, com melhores índices de proliferação angiofibroblástica (p=0,0007) e re-epitelização das bordas (p=0,0074). CONCLUSÃO: na avaliação cicatricial da parede abdominal de ratos Wistar sob tratamento com arginina, não houve alteração do nível sérico de nitratos e nitritos, da deposição de colágeno total e da densidade de miofibroblastos. Verificaram-se aumento da maturação de colágeno do tipo I, da densidade microvascular e melhora na formação do tecido de granulação cicatricial pelas melhores re-epitelização de bordas e proliferação angiofibroblástica.

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RESUMO

RESUMO Objetivo: avaliar os efeitos da arginina na cicatrização da parede abdominal de ratos Wistar. Métodos: vinte ratos Wistar foram submetidos à laparotomia e separados em dois grupos (arginina e controle), que receberam tratamento diário por via intraperitoneal com arginina (300mg/kg/dia) e solução tampão fosfato em dose equivalente ao peso, respectivamente, durante cinco dias. No sétimo dia pós-operatório, coletaram-se amostras de sangue e da cicatriz da parede abdominal de ambos os grupos. Avaliaram-se o nível sérico de nitratos e nitritos, a evolução cicatricial pelas dosagens de hidroxiprolina tecidual, formação de tecido de granulação, determinação da porcentagem de colágeno maduro e imaturo, densidade de miofibroblastos e angiogênese. Empregaram-se os testes de ANOVA e t de Student com p=0,05 para as comparações entre os grupos. Resultados: não ocorreram diferenças significantes entre os grupos estudados para dosagens de nitratos e nitritos (p=0,9903), hidroxiprolina tecidual (p=0,1315) e densidade de miofibroblastos (p=0,0511). O grupo arginina apresentou maior densidade microvascular (p=0,0008), maior porcentagem de colágeno tipo I (p=0,0064) e melhora na formação do tecido de granulação, com melhores índices de proliferação angiofibroblástica (p=0,0007) e re-epitelização das bordas (p=0,0074). Conclusão: na avaliação cicatricial da parede abdominal de ratos Wistar sob tratamento com arginina, não houve alteração do nível sérico de nitratos e nitritos, da deposição de colágeno total e da densidade de miofibroblastos. Verificaram-se aumento da maturação de colágeno do tipo I, da densidade microvascular e melhora na formação do tecido de granulação cicatricial pelas melhores re-epitelização de bordas e proliferação angiofibroblástica.

ABSTRACT Objective: to evaluate the effects of arginine on abdominal wall healing in rats. Methods: we submitted 20 Wistar rats to laparotomy and divided them into two groups, arginine and control, which then received, respectively, daily intraperitoneal treatment with arginine (300mg/kg/day) and weight-equivalent phosphate buffered solution, during five days. On the seventh postoperative day, we collected blood and scar wall samples from both groups. We evaluated serum nitrate and nitrite levels, wound evolution by tissue hydroxyproline dosages, granulation tissue formation, percentage of mature and immature collagen, myofibroblast density and angiogenesis. We used the ANOVA and the Student's t tests with p=0.05 for comparisons between groups. Results: there were no significant differences between the groups studied for nitrate and nitrite (p=0.9903), tissue hydroxyproline (p=0.1315) and myofibroblast density (p=0.0511). The arginine group presented higher microvascular density (p=0.0008), higher percentage of type I collagen (p=0.0064) and improved granulation tissue formation, with better angiofibroblastic proliferation rates (p=0.0007) and wound edge reepithelization (p=0.0074). Conclusion: in the abdominal wall healing evaluation of Wistar rats under arginine treatment, there was no change in serum nitrate and nitrite levels, total collagen deposition and myofibroblast density. There was an increase in type I collagen maturation, microvascular density and improvement in scar granulation tissue formation by better edge reepithelization and angiofibroblastic proliferation.

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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.

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O trauma facial é prevalente na emergência e pode trazer múltiplas repercussões para o indivíduo. O objetivo desse trabalho é avaliar o perfil epidemiológico de trauma facial em um hospital terciário. Trata-se de um estudo retrospectivo analítico, com dados de 58 prontuários de vítimas de fraturas faciais traumáticas entre janeiro de 2014 a janeiro de 2016, diagnosticadas através de exame físico e exames de imagem. As variáveis analisadas: sexo, idade, etiologia, topografia das fraturas, lesões associadas, período de internamento e estado geral. Homens foram mais acometidos, o mecanismo de trauma mais frequente foi lesão direta e a maioria das fraturas foi individualizada. O número de fraturas faciais múltiplas variou conforme a idade e com o mecanismo etiológico. O período de internamento foi curto. A pesquisa nessa área tem grande importância no sentido de estruturar os serviços de saúde, de modo que atuem reduzindo danos

Facial trauma is prevalent in the emergency room and can have multiple repercussions for the individual. The objective of this study is to evaluate the epidemiological profile of facial trauma in a tertiary hospital. This is a retrospective analytical study, with data from 58 medical records of victims of traumatic facial fractures between January 2014 and January 2016, diagnosed through physical examination and imaging. The variables: sex, age, etiology, fracture topography, associated lesions, period of hospitalization and general condition. The men were more affected, the most frequent trauma mechanism was direct injury and most of the fractures were individualized. The number of multiple facial fractures varied according to age and etiological mechanism. The period of hospitalization was short. Research in this area has great importance in order to prioritize and structure health services so that they act to reduce damages

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.

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PURPOSE:: To compare the two lines suture (total and seromuscular) after partial gastrectomy in normal and overweight rats. METHODS:: Forty Wistar rats were distributed in two groups. Group A received normal diet; group B, normal diet and supplementation with saccharose in the water. When group B progressed to a statistically greater weight than the animals of group A, the experiment (sleeve-like gastrectomy) was conducted with gastrorraphy in two sutures lines (total and seromuscular).The animals were distributed into two subgroups of 10. A1 and A2 subgroups were sacrificed at 7 and 14 days postoperatively as well as B1 and B2. Mortality, morbidity, complications attributed to the gastric suture, biochemical dosages, Lee index, macroscopy, weight of retroperitoneal and gonadal fat, optical microscopy with hematoxylin-eosin and picrosirius-red, were the evaluation parameters. RESULTS:: The overweight group achieved statistically greater weight after 16 weeks in induced obesity; there was no mortality or complications with clinical consequences attributable to morbidity. The overweight group had statistically greater weight of gonadal and retroperitoneal fat. The difference was observed in urea, albumin, total cholesterol and indirect bilirubin. CONCLUSION:: There was no outcome difference between the overweight and non-overweight group in two suture lines in gastrorrhaphy after sleeve-like gastrectomy.

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PURPOSE:To compare the two lines suture (total and seromuscular) after partial gastrectomy in normal and overweight rats.METHODS:Forty Wistar rats were distributed in two groups. Group A received normal diet; group B, normal diet and supplementation with saccharose in the water. When group B progressed to a statistically greater weight than the animals of group A, the experiment (sleeve-like gastrectomy) was conducted with gastrorraphy in two sutures lines (total and seromuscular).The animals were distributed into two subgroups of 10. A1 and A2 subgroups were sacrificed at 7 and 14 days postoperatively as well as B1 and B2. Mortality, morbidity, complications attributed to the gastric suture, biochemical dosages, Lee index, macroscopy, weight of retroperitoneal and gonadal fat, optical microscopy with hematoxylin-eosin and picrosirius-red, were the evaluation parameters.RESULTS:The overweight group achieved statistically greater weight after 16 weeks in induced obesity; there was no mortality or complications with clinical consequences attributable to morbidity. The overweight group had statistically greater weight of gonadal and retroperitoneal fat. The difference was observed in urea, albumin, total cholesterol and indirect bilirubin.CONCLUSION:There was no outcome difference between the overweight and non-overweight group in two suture lines in gastrorrhaphy after sleeve-like gastrectomy.(AU)

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ABSTRACT PURPOSE: To compare the two lines suture (total and seromuscular) after partial gastrectomy in normal and overweight rats. METHODS: Forty Wistar rats were distributed in two groups. Group A received normal diet; group B, normal diet and supplementation with saccharose in the water. When group B progressed to a statistically greater weight than the animals of group A, the experiment (sleeve-like gastrectomy) was conducted with gastrorraphy in two sutures lines (total and seromuscular).The animals were distributed into two subgroups of 10. A1 and A2 subgroups were sacrificed at 7 and 14 days postoperatively as well as B1 and B2. Mortality, morbidity, complications attributed to the gastric suture, biochemical dosages, Lee index, macroscopy, weight of retroperitoneal and gonadal fat, optical microscopy with hematoxylin-eosin and picrosirius-red, were the evaluation parameters. RESULTS: The overweight group achieved statistically greater weight after 16 weeks in induced obesity; there was no mortality or complications with clinical consequences attributable to morbidity. The overweight group had statistically greater weight of gonadal and retroperitoneal fat. The difference was observed in urea, albumin, total cholesterol and indirect bilirubin. CONCLUSION: There was no outcome difference between the overweight and non-overweight group in two suture lines in gastrorrhaphy after sleeve-like gastrectomy.

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OBJECTIVE: To evaluate the influence of oral supplementation with arginine on regeneration of injuries due to straining of the anterior tibial muscle of rats. METHODS: Twenty-four Wistar rats of weight 492.5 ± 50.45 g were used. Injuries were induced through straining the anterior tibial muscles. The rats were separated into three groups of eight rats each. In the untreated group (UTG), after induction of injuries, the rats were observed for 24 h. In the simulation group (SG) and the arginine group (AG) respectively, the rats received isotonic saline solution and arginine solution via direct gavage, over a seven-day period. At the end of the period, blood samples were collected for serum evaluations of creatine kinase (CK), lactic dehydrogenase (LDH), aspartate aminotransferase (AST) and C-reactive protein (CRP). The right and left anterior tibial muscles were resected for histopathological evaluations on the muscle injuries, investigating edema, hemorrhage and disorganization or morphometric alteration of the muscle fibers. The tissue repair was investigated in terms of proliferation of adipose tissue, angiogenesis and collagen fibers. The ANOVA and Student's t methods were used and p ≤ 0.05 was taken to be statistically significant. RESULTS: In the serum evaluations, the AG showed lower CK assay values and higher AST values. In the histopathological evaluation, the UTG presented edema and hemorrhage compatible with injuries due to strain; the SG presented edema and hemorrhage with proliferation of adipose tissue and collagen fibers; and the AG presented not only the findings of the SG but also, especially, intense angiogenesis. CONCLUSION: Oral supplementation with arginine did not cause any significant metabolic alterations that would contraindicate its use and it induced angiogenesis during the repair of muscles injured due to strain.

OBJETIVO: Avaliar a influência da suplementação oral com arginina na regeneração de lesão por estiramento do músculo tibial anterior de ratos. MÉTODO: Usaram-se 24 ratos Wistar (492,5 ± 50,45 gramas), induzidos com lesão por estiramento dos músculos tibiais anteriores e separados em três grupos com oito ratos cada. No grupo não tratado (GNT), após a indução das lesões, os ratos foram observados por 24 horas, nos grupos simulação (GS) e arginina (GA) receberam, por gavagem diariamente, respectivamente solução salina isotônica e solução de arginina, durante sete dias. Ao término dos períodos foram coletadas amostras de sangue para as avaliações séricas de creatina-quinase (CK), desidrogenase lática (LDH), aspartato-aminotransferase (AST) e proteína C reativa (PCR). Foram ressecados os músculos tibiais anteriores (direitos e esquerdos) para avaliações histopatológicas das lesões musculares e pesquisa de edema, hemorragia, desorganização ou alteração morfométrica das fibras musculares. E foi feita a reparação tecidual, para pesquisa da proliferação de tecido adiposo, angiogênese e fibras colágenas. Empregaram-se os testes ANOVA e t de Student com p ≤ 0,05 para significação estatística. RESULTADOS: Nas avaliações séricas o GA mostrou valores menores nas dosagens de CPK e maiores nas dosagens de AST. Nas avaliações histopatológicas, no GNT foram evidenciados edema e hemorragia compatíveis com lesões por estiramento, no GS edema, hemorragia com proliferação de tecido adiposo e fibras colágenas e no GA. Além dos achados do GS destacou-se intensa angiogênese. CONCLUSÃO: A suplementação oral com arginina não causou alterações metabólicas importantes que contraindiquem seu uso e induziu angiogênese durante a reparação de lesões musculares por estiramento.

RESUMO

Avaliar a influência da suplementação oral com arginina na regeneração de lesão por estiramento do músculo tibial anterior de ratos. MÉTODO: Usaram-se 24 ratos Wistar (492,5 ± 50,45 gramas), induzidos com lesão por estiramento dos músculos tibiais anteriores e separados em três grupos com oito ratos cada. No grupo não tratado (GNT), após a indução das lesões, os ratos foram observados por 24 horas, nos grupos simulação (GS) e arginina (GA) receberam, por gavagem diariamente, respectivamente solução salina isotônica e solução de arginina, durante sete dias. Ao término dos períodos foram coletadas amostras de sangue para as avaliações séricas de creatina-quinase (CK), desidrogenase lática (LDH), aspartato-aminotransferase (AST) e proteína C reativa (PCR). Foram ressecados os músculos tibiais anteriores (direitos e esquerdos) para avaliações histopatológicas das lesões musculares e pesquisa de edema, hemorragia, desorganização ou alteração morfométrica das fibras musculares. E foi feita a reparação tecidual, para pesquisa da proliferação de tecido adiposo, angiogênese e fibras colágenas. Empregaram-se os testes ANOVA e tde Student com p ≤ 0,05 para significação estatística. RESULTADOS: Nas avaliações séricas o GA mostrou valores menores nas dosagens de CPK e maiores nas dosagens de AST. Nas avaliações histopatológicas, no GNT foram evidenciados edema e hemorragia compatíveis com lesões por estiramento, no GS edema, hemorragia com proliferação de tecido adiposo e fibras colágenas e no GA. Além dos achados do GS destacou-se intensa angiogênese. CONCLUSÃO: A suplementação oral com arginina não causou alterações metabólicas importantes que contraindiquem seu uso e induziu angiogênese durante a reparação de lesões musculares por estiramento.

To evaluate the influence of oral supplementation with arginine on regeneration of injuries due to straining of the anterior tibial muscle of rats. METHODS: Twenty-four Wistar rats of weight 492.5 ± 50.45 g were used. Injuries were induced through straining the anterior tibial muscles. The rats were separated into three groups of eight rats each. In the untreated group (UTG), after induction of injuries, the rats were observed for 24 h. In the simulation group (SG) and the arginine group (AG) respectively, the rats received isotonic saline solution and arginine solution via direct gavage, over a seven-day period. At the end of the period, blood samples were collected for serum evaluations of creatine kinase (CK), lactic dehydrogenase (LDH), aspartate aminotransferase (AST) and C-reactive protein (CRP). The right and left anterior tibial muscles were resected for histopathological evaluations on the muscle injuries, investigating edema, hemorrhage and disorganization or morphometric alteration of the muscle fibers. The tissue repair was investigated in terms of proliferation of adipose tissue, angiogenesis and collagen fibers. The ANOVA and Student's tmethods were used and p≤ 0.05 was taken to be statistically significant. RESULTS: In the serum evaluations, the AG showed lower CK assay values and higher AST values. In the histopathological evaluation, the UTG presented edema and hemorrhage compatible with injuries due to strain; the SG presented edema and hemorrhage with proliferation of adipose tissue and collagen fibers; and the AG presented not only the findings of the SG but also, especially, intense angiogenesis. CONCLUSION: Oral supplementation with arginine did not cause any significant metabolic alterations that would contraindicate its use and it induced angiogenesis during the repair of muscles injured due to strain.

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