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Salvador, Brazil

Felzemburgh V.A.,Discipline of Surgical Technique and Experimental Surgery I | Nunes V.L.C.,Discipline of Pathology | Campos J.H.O.,Discipline of Surgical Technique and Experimental Surgery I
Acta Cirurgica Brasileira | Year: 2012

PURPOSE: To evaluate the donor site of adipocytes as well as histopathological alterations secondary to liposuction. METHODS: All animals underwent liposuction with a syringe on the right side of the back. While the left side of the back was used as control and did not undergo intervention. The 10 rabbits were divided into two groups A and B according the postoperative day which were submitted to euthanasia: 90 and 120 days. All adipose tissue from the donor site was analyzed and compared with the control macroscopic and light microscopy. Tissues were weighed and analyzed searching for histological changes and late inflammatory response to trauma such as fbrosis, fat necrosis and infammation and macrophage infltration. RESULTS: There was wide variation in adipose tissue volume between the experimental and the control on macroscopic analysis. The presence of histopathological changes was found in two samples at 90 days. CONCLUSIONS: There was a relationship between the presence of fbrosis with the weight and number of days after liposuction surgery in rabbits. The study show macroscopic difference between control and experiment sides in all rabbits. Source

Machado F.A.,Federal University of Triangulo Mineiro | Abdalla D.R.,Federal University of Triangulo Mineiro | Montes L.,Federal University of Triangulo Mineiro | Etchebehere R.M.,Discipline of Pathology | And 2 more authors.
European Journal of Gynaecological Oncology | Year: 2014

The aim of this study was to characterize infiltrating immune cells in cervical stroma biopsy samples from patients diagnosed with cervical intraepithelial neoplasias (CINs) who were treated with IFN-α 2b. The authors studied 13 volunteers who were diagnosed with Cervical intraepithelial neoplasiaCIN II or III and who received intra-lesional treatment with IFN-α 2b. They collected pre- and post-treatment biopsies from each patient. They also examined the slides under a common optical microscope with a X400 lens for biopsy sample sections that were labeled with immunohistochemistry for T lymphocyte, B lymphocyte, natural killer cell, macrophage, iNOS, and perforin markers. The presence of immune response cells in the lesion was observed after treatment with intralesional IFN-α 2b in patients with CIN II/III changes, a reduction in CD4+ and CD8+ T lymphocyte infiltration in the women who responded well to treatment. However, there was a significant increase in these markers in samples from women who did not respond to treatment. Nonetheless, immunotherapy with IFN-α 2b administered intralesionally in patients with CIN II/III yields favorable results in patients who do not smoke. Source

Said S.,James Cook University | Alfred-King Y.L.,Discipline of Pathology | Alfred-King Y.L.,University Tunku Abdul Rahman | Yik-Hong H.,James Cook University
Malaysian Applied Biology | Year: 2014

Colorectal cancer develops in a multi-step process and is associated with genetic alterations. Blocking apoptosis is a key factor to unlimited cell proliferation and immortalization. Survivin expression inhibits the programmed cell death process, apoptosis. This molecule could play a potential role in cancer development. Survivin is an attractive target for clinical trials to develop cancer treatment. RNA was prepared from colorectal tumor and adjacent non-tumor tissues and then transcribed to complementary DNA. Human survivin mRNA levels were quantitatively measured by real time polymerase chain reaction (PCR) in tumor and adjacent non-tumor tissues. Expression levels of survivin mRNA in adenocarcinomas were significantly higher than in non-tumor mucosa (p < 0.0001). The expressions of survivin mRNA in adenocarcinomas were related to the degree of differentiation (survivin; p=0.034). No difference was found with other clinicopathological features. These findings indicate survivin role in colorectal carcinogenesis. Survivin could be used as a potential diagnostic and prognostic marker in colorectal cancer. Successful inhibition of this molecule could lead to the development of a new drug for cancer therapy. © 2014, Malaysian Society of Applied Biology. All rights reserved. Source

Bonassa C.E.G.,Universidade Sao Francisco | Pereira J.A.,Discipline of Pathology | de Campos F.G.C.M.,University of Sao Paulo | Chaim F.D.M.,Universidade Sao Francisco | Martinez C.A.R.,USF
Acta Cirurgica Brasileira | Year: 2015

Purpose: To measure the content of acidic mucin, sialomucin, and sulfomucins in the colonic mucosa without fecal stream submit to intervention with sucralfate (SCF). Methods: Thirty-six rats were submitted to a right colostomy and a distal mucous fistula and divided into two groups according to sacrifice to be performed two or four weeks. Each group was divided into three subgroups according daily application of enemas containing saline, SCF at 1.0 g/kg/day or 2.0 g/kg/day. Colitis was diagnosed by histological analysis. Acid mucins were determined with the Alcian-Blue and sulfomucin and sialomucin by high iron diamine-alcian blue (HID-AB) techniques. The mucins were quantified by computer-assisted image analysis. Mann-Whitney and ANOVA tests were used to analyze the results establishing the level of significance of 5% for both (p<0.05). Results: SCF enemas decreased the inflammation score and was related to the concentration used and time of the intervention. SCF at both concentrations increased the content of acid mucin, which was related to the concentration used and to the improvement in the inflammatory score. There was an increase in the content of sulfomucins and sialomucins in SCF groups. SCF increased sulfomucins from 2 weeks of intervention, which was not related to the dose or time of application. The increase in sialomucin content was related to the time and dose used in the intervention. Conclusion: Sucralfate increased the content of acidic mucins, primarily at the expense of sialomucin, which was affected by the dose and time of intervention. © 2015, Sociedade Brasileira para o Desenvolvimento de Pesquisa em Cirurgia. All rights reserved. Source

Palma Zochio Tozzato G.,Laboratory of Pharmacology | Taipeiro E.F.,Discipline of Biochemistry | Spadella M.A.,Discipline of Human Embryology | Marabini Filho P.,Discipline of Pathology | And 3 more authors.
Clinical and Experimental Immunology | Year: 2016

Rheumatoid arthritis (RA) may promote endothelial dysfunction. This phenomenon requires further investigation, especially in collagen-induced arthritis (CIA), as it is considered the experimental model most similar to RA. The objectives of this study were to identify CIA-induced changes in noradrenaline (NE) and acetylcholine (ACh) responses in mice aortas that may suggest endothelial dysfunction in these animals. Moreover, we characterize CIA-induced modifications in inducible nitric oxide synthase (iNOS) expression in the aortas and cardiac and renal tissues taken from these mice that may be related to possible endothelial dysfunction. Male DBA/1J mice were immunized with 100 μg of emulsified bovine collagen type II (CII) plus complete Freund's adjuvant. Twenty-one days later, these animals received a boost of an additional 100μg plus incomplete Freund's adjuvant. Fifteen days after the onset of the disease, aortic rings from CIA and control mice were challenged with NE and ACh in an organ bath. In these animals, iNOS was detected through immunohistochemical analysis of aorta, heart and kidneys. Plasma nitrite concentration was determined using the Griess reaction. CIA did not change NE or ACh responses in mice aorta but apparently increased the iNOS expression not only in aorta, but also in cardiac and renal microcirculation. In parallel, CIA reduced nitrite plasma concentration. In mice, CIA appears to increase the presence of iNOS in aorta, as well as in heart and in kidney microcirculation. This iNOS increase occurs apparently in parallel to a reduction of the bioavailability of NO. This phenomenon does not appear to change NE or ACh responses in aorta. © 2016 British Society for Immunology. Source

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