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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Efetividade da UtilizaÃÃo de Incubadoras de CO2 Equipadas com filtro Hepa e Filtro Hepa-Voc para Cultivo de EmbriÃes em Ciclos de FertilizaÃÃo in Vitro / Effectiveness of Using CO2 Incubators equipped with HEPA filters and HEPA-You for Cultivation of Embryos in IVF Cycles

Tulius Augusto Ferreira de Freitas 22 June 2010 (has links)
Introduction and objectives. The air quality in sterile environment is an important aspect to cell culture. It is known the culture conditions are essential for in vitro human embryo development; however there is no standardization for incubator filters in in vitro fertilization (IVF) laboratories. Recently, the incubator air quality has been receiving attention, and effect of volatile organic compounds (VOC) has being highlighted. The aim of this study was to evaluate the laboratorial outcomes of IVF cycles with embryo culture using CO2 incubators with the HEPA filter for air particles and a high efficiency VOC filter with activated coal. Material and methods. This is an observational prospective controlled study which included 160 IVF cycles at Human Reproduction Clinic CRIAR between 2008 January and 2009 September. The cycles were matched to patient age, infertility etiology, pituitary desensitization protocol, and semen origin and quality. Thirty five cycles were compared in which the embryos were cultured in CO2 incubator with HEPA filter (HEPA group) and 35 cycles where a CO2 incubator with VOC filter was used for embryos cultures (VOC group). Results. The groups were similar for general characteristics of IVF cycles. We did not observed differences about normal fertilization and embryo cleavage rates. On the other side, the proportion of high quality embryos (grade A) was higher on VOC group (50.8%) than HEPA group (35.7%; p=0.05). Conclusions. IVF cycles using CO2 incubator with VOC filter for embryo culture results in a increased high quality embryos rate, those with high implantation potential. / IntroduÃÃo e objetivos. A qualidade do ar em um ambiente estÃril à um aspecto de grande importÃncia para a cultura celular. Apesar de a condiÃÃo da cultura ser um fator preponderante para o desenvolvimento de embriÃes in vitro, nÃo hà uma padronizaÃÃo dos filtros utilizados nas incubadoras dos laboratÃrios de fertilizaÃÃo in vitro (FIV). Nos Ãltimos anos, a qualidade do ar nas incubadoras de cultura embrionÃria vem recebendo maior atenÃÃo, e o papel dos compostos orgÃnicos volÃteis (VOC) à um item em destaque. O objetivo deste estudo foi avaliar os resultados laboratoriais de ciclos de FIV, utilizando incubadoras de CO2 para cultura de embriÃes com o filtro HEPA para partÃculas de ar e filtro VOC de alta eficiÃncia com carvÃo ativado. Materiais e mÃtodos. Este trabalho consiste de um estudo observacional prospectivo, incluindo 160 ciclos de FIV realizados na ClÃnica de ReproduÃÃo Humana CRIAR, de janeiro de 2008 a setembro de 2009. Os ciclos foram pareados de acordo com a idade da paciente, fator de infertilidade, protocolo de bloqueio hipofisÃrio e origem e qualidade do sÃmen utilizado. Trinta e cinco (35) ciclos nos quais os embriÃes foram cultivados em incubadora de CO2 equipada com filtro HEPA (grupo HEPA) e 35 ciclos cujos embriÃes foram cultivados em incubadora de CO2 equipada com filtro VOC (grupo VOC) foram comparados. Resultados. Os grupos foram semelhantes em relaÃÃo aos aspectos gerais dos ciclos de FIV. NÃo foram observadas diferenÃas entre os grupos quando avaliadas as taxas de fertilizaÃÃo normal e clivagem embrionÃria. à proporÃÃo de embriÃes de alta qualidade (grau A), entretanto, foi maior no grupo VOC (50,8%) comparado ao grupo HEPA (35,7%; p=0,05). ConclusÃes. Ciclos de FIV utilizando incubadoras de CO2 equipadas com sistema de filtragem de ar do tipo VOC para cultivo embrionÃrio resultam, em maior taxa de embriÃes grau A, ou seja, aqueles com maior potencial de implantaÃÃo.
2

Effects of Binder of SPerm protein 1 (BSP1) on bovine sperm function: acrosome reaction, cleavage rate and in vitro production of blastocysts / AÃÃes da binder of Sperm protein 1 (BSP1) sobre a funcionalidade de espermatozoides bovinos: reaÃÃo acrossÃmica, taxa de clivagem e produÃÃo in vitro de blastocistos

VerÃnica Hoyos Marulanda 13 February 2015 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / The Binder of Sperm Protein 1 (BSP1) is a protein produced by seminal vesicles of animals. It helps into the fertilization process of oocytes, promoting sperm capacitation, mediating the ligation from itself with the oviduct epithelium, and increasing the motility in the oviduct. When spermatozoa with purified BSP1 were incubated, acrosomal reaction rates were determined with and without the presence of heparin, as controls. The percentage of acrosomal reaction was higher (p <0.05) in control 1 (44.5%) compared with the other treatments (BSP1:10 Âg/mL: 24.5%; 20 Âg/mL: 25.5%; 40 Âg/mL: 26.0 %), and lower the rate (p> 0.05) when sperm were incubated only in Fert-TALP medium without heparin (14.5%). Cleavage and blastocyst rates were evaluated on days two and seven respectively, after fertilize oocytes in a medium containing BSP1. 1274 cumulus- oocyte complexes were recovered and incubated for 18 hours with frozen-thawed ejaculated semen in a Fert-TALP medium, containing: only heparin, 10, 20 or 40 &#956;g/mL of BSP1. Cleavage and blastocyst rates (34.1  4.4 vs 40.8  5.0%) were similar (p> 0.05) when incubation was made with 10 Âg/mL of BSP1 and heparin, respectively. However, the concentrations of 20 and 40 Âg/mL decreased the formation of blastocysts (22.4  2.9 and 19.3  4.1%) compared with heparin (40.8  5.1%, p <0.02). Subsequently, cumulus- oocyte complexes (n = 2239) were incubated with frozen-thawed ejaculated semen. Spermatozoa were selected by a gradient of 45% -90% Percoll containing: only heparin, 10, 20, 40 &#956;g/mL of BSP1 and there was a control 2 of Percoll without heparin or BSP1. Cleavage rate was similar (p> 0.05) for the incubation with concentrations of 10, 20 and 40 &#956;g/mL of BPS1 (67.7  3.0, 68.7  3.5, 75.2  3.8, respectively). However, these rates were similar when it was used just heparin and when oocytes were incubated with 40Âg/mL of BSP1 (78.9  1.7 vs 75.2  3.8%). For blastocyst rates was found that they were similar (p> 0.05) when the selection was made with heparin (44.1  4.3%) and 40 Âg/mL of BSP1 (30.0  3.3%). Finally, 1213 cumulus-oocyte complexes were recovered and incubated with freeze-thawed epididymal semen in Fert-TALP medium, which contained: only heparin, with heparin, and 10, 20 or 40 Âg/mL of BSP1. Cleavage and blastocyst rates were similar after incubation with and without heparin, but the concentration of 40Âg/mL of BSP1 produced higher cleavages rates (79.0  1.1%) than control 1 (68.5  1.3%, p <0.05). About blastocyst rates, there were rates significantly higher when concentrations of 20 and 40 Âg/mL of BSP1 were used (35.6  2.5 and 41.1  2.0%) than with (24.7  3.2; p <0.05) and without heparin (27.3  1.6%; p <0.0003). In conclusion, BSP1 allowed proper cleavage and development, when the protein was added to the fertilization medium and the Percoll gradient using ejaculated semen, and to the fertilization medium when used epididymal sperm, without requiring the use of heparin. / A âBinder of Sperm Protein 1â (BSP1) à uma proteÃna produzida pelas vesÃculas seminais dos animais, que ajuda no processo de fertilizaÃÃo do oÃcito promovendo a capacitaÃÃo espermÃtica, mediando a sua ligaÃÃo com o epitÃlio do oviduto e aumentando sua motilidade no oviduto. As taxas de reaÃÃo de acrossoma dos espermatozoides foram determinadas ao serem incubados com BSP1 purificado, e com e sem a presenÃa de heparina, como controles. A porcentagem de reaÃÃo de acrossoma foi maior (p<0.05) no controle 1 (44.5%) comparado com os tratamentos restantes (BSP1: 10 Âg/mL: 24.5%; 20 Âg/mL: 25.5%; 40 Âg/mL: 26.0%), sendo menor esta taxa (p>0.05) quando os espermatozoides sà foram incubados no meio Fert-TALP sem heparina (14.5%). As taxas de clivagem e de blastocistos foram avaliadas nos dias dois e sete respectivamente, depois de fertilizar oÃcitos em um meio que continha BSP1. Foram recuperados 1274 COCs e incubados durante 18 horas com sÃmen ejaculado congelado- descongelado em meio Fert-TALP, que continha: sà heparina, 10, 20 ou 40 Âg/mL de BSP1. As taxas de clivagem e de blastocistos (34.1  4.4 vs 40.8  5.0%) foram similares (p>0.05) quando se fez a incubaÃÃo com 10 Âg/mL de BSP1 e heparina, respectivamente. PorÃm, as concentraÃÃes de 20 e 40 Âg/mL diminuÃram a formaÃÃo de blastocistos (22.4  2.9 e 19.3  4.1%) em relaÃÃo com a heparina (40.8  5.1%; p < 0.02). Posteriormente foram incubados COCs (n= 2239), com sÃmen ejaculado congelado-descongelado que foi selecionado por um gradiente de Percoll 45%-90% que continha: sà heparina, 10, 20 ou 40 Âg/mL de BPS1 e foi realizado um controle 2 de Percoll sem heparina nem BSP1. A taxa de clivagem foi similar (p > 0.05) para a incubaÃÃo com as concentraÃÃes de 10, 20 e 40 Âg/mL de BSP1 (67.7Â3.0, 68.7Â3.5, 75.2Â3.8). PorÃm, estas taxas foram similares quando sà foi usada heparina e quando se incubou com 40 Âg/mL de BSP1 (78.9Â1.7 vs 75.2Â3.8%). Para as taxas de blastocistos encontrou-se que foram similares (p > 0.05) quando se fez a seleÃÃo com heparina (44.1Â4.3%) e com 40 Âg/mL de BSP1 (30.0Â3.3%). Finalmente, foram recuperados 1213 complexos cumulus-oÃcitos e incubados com espermatozoides epididimÃrios congelados-descongelados em meio Fert-TALP, que continham: sà heparina, sem heparina, e 10, 20 ou 40 Âg/mL de BSP1. As taxas de clivagem e de blastocistos foram similares apÃs as incubaÃÃes com e sem heparina, mas a concentraÃÃo de 40 Âg/mL de BSP1 produziu maiores taxas de clivagem (79.0  1.1%) que o controle 1 (68.5  1.3%; p < 0.05). Quanto Ãs taxas de blastocistos, encontraram-se maiores taxas quando foram usadas as concentraÃÃes de 20 e 40 Âg/mL de BSP1 (35.6  2.5 e 41.1  2.0%) que com (24.7  3.2; p < 0.05) e sem heparina (27.3  1.6%; p < 0.0003). Em conclusÃo, a BSP1 adicionada ao meio de fertilizaÃÃo e ao gradiente de Percoll quando usado o sÃmen ejaculado, e ao meio de fertilizaÃÃo quando usados espermatozoides epididimÃrios, permitiu clivagem e desenvolvimento prÃprio, sem a necessidade do uso de heparina.

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