Avaliação da fibrose endometrial e dos miofibroblastos nas endometroses ativa e inativa da éguas

A endometrite é a principal causa de redução da fertilidade em éguas. Nas endometroses, glândulas dilatadas e repletas de secreção e restos celulares são observadas com frequência no endométrio eqüino, assim como glândulas não dilatadas que mostram acentuada reação fibrótica. Este estudo teve como objetivo avaliar a fibrose endometrial das éguas considerando as características histomorfológica, histoquímica e imunoistoquímica da endometrose ativa, endometrose inativa, endometrose inativa destrutiva e endometrose ativa destrutiva, procurando esclarecer a participação dos miofibroblastos nestes processos que podem influenciar a progressão da doença. No presente trabalho pode-se constatar que o arranjo das fibras colágenas e suas características, esta relacionado com o tipo de evolução do processo e, eventualmente, com a sua possível origem. O processo de endometrose mostra variações morfológicas que permitem diferenciar subtipos definidos. O picrosirius red demonstrou que nas endometroses ativa e ativa destrutiva o tipo de colágeno predominante é o que possui arranjo reticular, menos denso, enquanto que nas endometroses inativa e inativa destrutiva o predomínio foi de um colágeno mais denso. O colágeno de arranjo reticular predomina nas lesões fibróticas nas endometroses ativa e ativa destrutiva.O colágeno denso predomina nas lesões fibróticas das endometroses inativa e inativa destrutivas. As lesões fibróticas vasculares mais graves acompanham as endometroses inativa e ativa destrutiva sugerindo que estes dois tipos de endometroses tenham origem naquelas lesões. A expressão mais fraca de α-SMA nos ninhos fibróticos das endometroses inativas reflete a predominância de fibrócitos nestas lesõesEndometritis is the leading cause of impaired fertility in horses. In endometroses, dilated glands filled with secretion and cell debris are seen frequently in equine endometrium, as well as non-dilated glands showing marked fibrotic reaction. This study aimed to evaluate the endometrial fibrosis considering the characteristics of mares histomorphological, histochemical and immunohistochemical studies of endometriosis active, inactive endometriosis, endometriosis endometriosis active and inactive destructive destructive, seeking to clarify the involvement of myofibroblasts in these processes that may influence disease progression. In the present work can be seen that the arrangement of collagen fibers and their characteristics, is related to the type of process evolution and eventually to their possible origin. The process of endometriosis shows morphological variations defined to differentiate between subtypes. The picrosirius red showed that the active endometroses active and destructive type of collagen is the predominant reticular arrangement that has less dense, whereas in endometroses inactive and inactive destructive was the predominance of a more dense collagen. The lattice arrangement of collagen predominates in the fibrotic lesions in the active and active endometroses destrutiva.O dense collagen predominates in the fibrotic lesions of endometroses inactive and inactive destructive. The most severe vascular fibrotic lesions accompanying endometroses inactive and active destructive suggesting that these two types of endometroses originate in those lesions. The weaker expression of α- SMA in fibrotic nests of endometroses inactive fibrocytes reflects the predominance of these lesion

Caracterização imunoistoquímica dos miofibroblastos endometriais e da expressão de MMP-2 nas endometrites crônicas das éguas

A biópsia uterina é uma ferramenta valiosa utilizada na avaliação da fertilidade da égua. 0 objetivo deste trabalho foi estudar a relação entre a presença de miofibroblastos, a expressão da MMP-2 e a intensidade do processo fibrótico nas endometrites crônicas das éguas. Foram utilizadas 60 biópsias uterinas de éguas provenientes da rotina do Hospital Veterinário da FMVZ - UNESP, Campus de Botucatu. Biópsias endometriais classificadas histologicamente de acordo com Kenney e Doig (1986) e segundo as definições de Ricketts e Alonso (1991) para endometrite cronica infiltrativa e endometrose. A avaliação dos graus de fibrose endometrial foi feita par meio dos métodos histoquímicos Tricrômico de Masson e Picrosirius Red. A expressão da MMP-2 assim como a expressão de actina de músculo liso α dos miofibroblastos foi avaliada utilizando-se tecnica imunoistoquímica. A quantidade de colágeno na fibrose endometrial foi maior nas regiões periglandulares, perivasculares e no estrato esponjoso, predominando o colágeno do tipo I. Tanto no endométrio hígido como nas endometrites crônicas foi observada imuno-reatividade para as enzimas estudadas. A α-SMA e a MMP-2 estão envolvidas nos processos fibróticos endometriais das éguas uma vez que estas enzimas aumentam em expressão e intensidade de reação conforme o grau de endometrite.Uterine biopsy is a valuable tool for evaluation of mare's fertility. The aim of this work was to study the relation between the presence of myofibroblasts, the expression of MMP-2 and the intensity of fibrotic process in chronic endometritis in mares. Sixty mare's uterine biopsies from the Veterinary Hospital routine of FMVZ-UNESP, Campus of Botucatu, were used. Biopsies of chronic endometrites were classified according to Kenney and Doig (1986) and definitions Ricketts & Alonso (1991) for chronic infiltrative endometrites and endometrosis. Evaluations of endometrial fibrotic levels were done by histochemical methods. Masson and Picrosirius Red Tricromio. The expression of MMP-2 as the expression of myofibroblasts straight α- smooth muscle actin was evaluated using immunohistochemical techniques. The collagen concentration in fibrotic endometrium was higher at periglandular, perivascular and stratum spongiosum regions with collagen type I predominance. Imnunoreactivity of α-SMA and MMP-2 was detected in healthy endometrium as in severe chronic endometritis. The a- SMA and MMP-2 showed variation in expression and reaction was more intense in the normal and chronic affected endometrium and may plays a hole in the endometrial fibrotic process.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Avaliação clínica de ratos de laboratório (Rattus novergicus linhagem Wistar): parâmetros sanitários, biológicos e fisiológicos

O rato de laboratório, Rattus novergicus, tem sido um dos animais mais utilizados pelos centros de pesquisa de todo o mundo. Esses animais necessitam manter seu meio interno constante, com um controle rigoroso dos limites de sua variação. Isso torna importante o conhecimento dos valores dos diferentes parâmetros sanitários, biológicos e fisiológicos para se avaliar a homeostase e as modificações induzidas por processos patológicos, assim como avaliar os resultados obtidos nos procedimentos experimentais, os quais podem ser influenciados pelas condições ambientais ou por agentes infecciosos, podendo interferir na sensibilidade dos resultados. Sabe-se que os parâmetros biológicos e fisiológicos podem variar de acordo com sexo, linhagem, genótipo e ser influenciados pela idade, dieta, manuseio, ambiente, entre outros fatores. O presente trabalho teve como objetivo avaliar as condições clínicas dos ratos de laboratório, Rattus novergicus linhagem Wistar, criados no Biotério Central da Universidade Federal do Espírito Santo (UFES), a partir dos parâmetros sanitários (hematologia clínica, bioquímica clínica e parasitologia), parâmetros biológicos (consumo de água e ração, volume de urina e peso corpóreo) e parâmetros fisiológicos (cardiológicos e respiratórios).The laboratory rat, Rattus novergicus, is one of the most used animals by research centers worldwide. These animals have to maintain their internal medium stable and rigorous control of the limits of its variation, making the information on the values of the different parameters important to evaluate homeostasis and modifications induced by pathological processes, besides evaluating the results from experimental procedures that may be affected by environmental conditions or infectious agents likely to interfere with result sensibility. It is known that biological and physiological parameters can vary according to sex, strain and genotype, and could be influenced by age, diet, handling, environment, and other factors. The objective of the present work was to evaluate the clinical conditions of Wistar laboratory rats, Rattus novergicus , reared in the Animal Center of the Espírito Santo Federal University (UFES), using sanitary parameters (clinical hematology, clinical biochemistry and parasitology), biological parameters (water and ration consumption, urine volume and body weight) and physiological parameters (cardiac and respiratory rhythms)

EFFECT OF Bifidobacterium animalis ON MICE INFECTED WITH Strongyloides venezuelensis

The administration of viable Bifidobacterium animaliswas tested to induce resistance against Strongyloides venezuelensis infection in mice. Effects on parasite burden, worm length, egg output, and intestinal mucosal histology were evaluated. The oral administration of B. animalis, strain 04450B, starting 14 days before the inoculation of nematode larvae significantly decreased the worm burden and egg output. In probiotic treated animals, the percent reduction of adult worms in the intestine was of 33% and the reduction of egg production was of 21%, compared with those of the control group. The duodenum villous height and villous/crypt ratio were significantly higher in probiotic-treated mice, indicating that this group could be experiencing less intestinal damage. The present findings revealed that the administration of B. animalis for the amelioration of host response to nematode infections is biologically plausible and could have some potential for impacting public health. Meanwhile, further study is needed to delineate the nature and identity of the factor(s) involved in these beneficial effects

Biomechanical and histologic analysis in aortic endoprosthesis using fibrin glue

Background: The absence of incorporation between endoprosthesis (EP) and the arterial wall may lead to device migration and endoleaks around the stent graft. Alternatives have been tested aiming to improve this incorporation. Fibrin glue is used in many operating procedures promoting adhesion and tissue regeneration; however, its use to improve EP incorporation by arteries is unknown.Objective: The objective of this study was to analyze dislodgement forces needed to extract the EPs implanted in pig aorta, compare different oversizing and fibrin glue injections, and to analyze histologic changes among groups.Methods: Straight EPs were implanted in the thoracic aorta of pigs using 10% oversizing plus fibrin glue in the interface between the EP and the artery (group 1), using 20% oversizing (group 2), and 10% oversizing (group 3). Fourteen days after the implant, the animals were killed to enable biomechanical analysis of the EP and to verify histologic changes of the aortic wall and its interface with the EP.Results: Group 1 showed a dislodgement force of 21.9 +/- 5.3 Newton (N) being higher than the other groups and statistically significant when compared to group 3 (15.6 +/- 3.6N), P = .003%. Group 2 had a higher dislodgement force and statistically more significant than group 3 (19.5 +/- 7.8N). Histologic analysis showed tissue reaction with inflammatory cells and fibroblasts higher in group 1 and group 2 compared to group 3.Conclusion:This study reports a large animal survival model of thoracic aortic stent graft placement by testing the impact of fibrin glue on EP incorporation. Compared to oversizing alone, fibrin glue placed between the stent graft and the arterial wall increases EP incorporation. Additional studies are needed to determine the potential utility of fibrin glue in the setting of human arterial endografts. (J Vase Surg 2011;53:1368-74.

Histopathological and b-mode ultrasound characteristics in a primary canine duodenal adenocarcinoma - case report

Lower gastrointestinal tract neoplasms are rare in domestic animals, representing 3% of all biopsies and necropsies. Our objective is to describe the histopathological and B-mode ultrasound findings in a case of duodenal adenocarcinoma in a dog, since it commonly occurs in the large intestine. On ultrasound examination, there was transmural wall thickening in the duodenum with loss of layer structure, focal peritonitis and adenopathy. Histopathological examination of the intestinal mass revealed a malignant epithelial neoplasm, densely cellular and infiltrative, extending through the lamina propria, submucosa, muscle and hypodermis, characterizing a duodenal adenocarcinoma. We conclude that adenocarcinomas may be included in the differential diagnosis of transmural lesions in the duodenum in B-mode ultrasound examinations, but a laparotomy and biopsy are required for definitive diagnosis