5 research outputs found
Influência da administração precoce de INFLIXIMAB na cicatrização de anastomose no cólon esquerdo de ratos com ou sem colite induzida
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Medicina, Programa de Pós-Graduação em Ciências Médicas, 2017.Objetivo: Avaliar a influência da utilização precoce do INFLIXIMAB sobre a cicatrização de anastomose no cólon esquerdo de ratos em um modelo experimental de colite, comparando a força de ruptura da anastomose e analisar a relação com a cicatrização da parede abdominal. Método: Trinta e dois ratos foram distribuídos em quatro grupos contendo 08 animais cada. Dois grupos (16 animais) foram submeditos a indução de colite por enema de ácido acético com dose de 3 ml por via retal, e dois grupos (16 animais) não sofreram indução de colite. Todos os ratos foram submetidos à laparotomia para exposição do cólon distal com secção do mesmo a cerca de 2,5 a 3,5 cm cranial à reflexão peritoneal e anastomose término-terminal do segmento. Tanto no grupo com colite induzida como no grupo sem colite, metade dos animais (8) receberam infliximab (IFX), 4 no 1 DPO e 4 no 3 DPO; e 8 receberam NaCl a 0,9%. No sétimo DPO foi realizada a pesagem dos animais e a re-laparotomia para colectomia, seguida de eutanásia. Foram avaliados a variação de peso, a força tensil de ruptura da anastomose e da parede abdominal, além de achados histopatológicos nas lâminas de anastomoses. Resultados: Nos animais com colite houve maior perda de peso em relação aos sem colite, mais acentuada nos que receberam IFX no 1o DPO (p=0,007). O IFX piorou a força tênsil de rutura da anastomose nos animais com colite quando administrado no 1o DPO (p=0,001), porém quando administrado no 3o DPO ou com placebo, o IFX melhorou a força de ruptura anastomótica nos animais com colite, sendo esta, maior do que os animais sem colite (p=0,001). Conclusão: O IFX prejudicou a cicatrização das anastomoses no cólon esquerdo de ratos com colite, quando administrado no 1o DPO. Quando administrado no 3o DPO ou com placebo houve uma inversão, com melhora nos valores de força de ruptura da anastomose em relação ao grupo sem colite.Objective: To evaluate the influence of the early use of INFLIXIMAB (IFX) on the anastomosis healing in the left colon of rats in an experimental model of acetic acid colitis induced, comparing the tensile strength of the anastomosis, and to analyze the relationship with the healing of the abdominal wall. Method: Thirty-two rats were divided into four groups containing 08 animals each. Two groups (16 rats) were carried out the induction of colitis by enema of acetic acid with dose of 3 ml, per rectally, with no induction of colitis in the other two groups (16 rats). All the rats were submitted to laparotomy for exposure of the distal colon and sectionated approximately 2.5 to 3.5 cm cranial from the peritoneal reflection and proceeded end-to-end anastomosis. In both groups, with and without colitis, half the animals (8) received infliximab administration,4 rats in the 1th POD and 4 in the 3th POD, and the other half (8) received NaCl solution0,9% administration. In the 7th POD the animals were weighed and relaparotomy was performed for colectomy followed by euthanasia. Were evaluated the weight variation, anastomosis and abdominal wall scar rupture tensile strength and
histopathological findings by H-E stain. Results: In the animals with colitis, there was greater weight loss in relation to the without colitis group, more pronounced in who received IFX in the 1st POD (p=0.007). The IFX has deteriorated the rupture tensile strength of the anastomosis in the animals with colitis when administered in the 1st POD (p=0.001), but when administered in the 3rd POD or placebo, IFX has improved
the anastomotic rupture tensile strength in animals with colitis, this being, greater than the animals without colitis (p=0.001). Conclusion: The Infliximab impaired the healing of anastomoses in the left colon of rats with colitis when administered in the 1st POD. When administered in the 3rd POD or when placebo was given, there was a reversal, with the improvement in the values of the breaking strength of the anastomosis in
relation to the group without colitis
Experimental and numerical investigation on spark ignition of linearly-arranged non-premixed swirling burners
The ignition characteristics of a non-premixed multiple-burner linear combustion chamber was investigated experimentally and numerically, focusing on the determination of the mechanisms driving flame propagation from burner to burner. For different inter-burner spacings, overall equivalence ratios and bulk velocities, measurements of the velocity field and the mixture fraction distribution have been performed, respectively, with laser doppler anemometry and planar laser-induced fluorescence of acetone in the un-ignited flow. It was shown that in every individual burner, gas mixes with air within a central recirculation zone (CRZ) where the mixture is flammable except in the axial central rich gas jet and the annular air jet. Flammable mixture from the CRZ is extracted by the annular jet and this results in the existence of bridges of positive flammability factor in the inter-burner region. These bridges allow flame fragments to travel from the CRZ of the ignited burner to the CRZ of the adjacent unignited one, leading to burner-to-burner flame propagation. The ignition probability that sparking within a burner results in ignition of the adjacent one was obtained by performing many separate ignition trials with a laser spark. Ignition probability contours were also computed using a previously developed stochastic low-order ignition model and a large eddy simulation (LES) time-averaged solution of the cold flow. The quantification of the probability a flame kernel leads to burner ignition explained the differences existing between experimental results and the model. The results presented in this article extend our understanding of the mechanisms underlying the global ignition behavior of non-premixed annular combustion chambers.The authors gratefully acknowledge financial assistance from the EPSRC
Additional file 3: Figure S3. of Kaiso differentially regulates components of the Notch signaling pathway in intestinal cells
CpG island prediction of the minimal JAG1 promoter. The JAG1 gene spanning â200 to +2500Â bp of the TSS was analyzed for putative CpG islands. This GC-rich region harbors 5 potential CpG islands. (PDF 51Â kb
Additional file 3: Table S1a. of Between Lake Baikal and the Baltic Sea: genomic history of the gateway to Europe
List of samples included in “Extended” dataset. Table S1b List of samples included in “Core” dataset. Table S1c List of samples included in “Ancient” dataset. Table S2 Results of ADMIXTURE for K = 9. Table S3 Results of ADMIXTURE for K = 6, 7, 8. Table S4 Results of f3 test. Table S5 Results of IBD sharing analysis in 1–3 cM and 4–10 cM bins. Table S6 Total amount of shared IBD between populations. Table S7 Standard residue of linear regression analysis of distance-IBD sharing. Table S8 Distance and shared IBD between pairs of populations. Table S9: Results of f3 outgroup test with ancient samples. (XLSX 482 kb
Additional file 1: Figure S1. of Between Lake Baikal and the Baltic Sea: genomic history of the gateway to Europe
Quality control process. (PDF 25Â kb