Samples from 93 of 115 consecutive cadaveric renal transplants were selected to define polymorphisms in both IFN-γ and IL-10. A 12 CA repeat IFN-γ polymorphic allele was found in 73 patients (70 in patients analysed further). This polymorphism was associated with high IFN-γ production in vitro. According to the presence or not of the 12 CA repeat allele patients were separated in high and low producer genotype groups. The incidence of acute rejection was 54.3% in this high IFN-γ genotype group, contrasting with 44.4% in the low IFN-γ. Requirement for ATG therapy was greater in the high IFN-γ group (odds ratio [OR]=2.5). Among HLA-DR-mismatched patients, IFN-γ high producer genotype was more strongly associated with rejection (OR=1.6). In the cyclosporine monotherapy subgroup, 11 out of 14 patients with IFN-γ high genotype (78%) had acute rejection (OR=2.88, p=0.09). Graft survival was similar between the two IFN-γ groups. When the analysis was controlled for the presence of delayed graft function, 40.5% of the high IFN-γ genotype patients had serum creatinine levels above 200 micromoles/L contrasting with only 14.3% of the low IFN-γ genotype recipients at 5 years after transplantation (p=0.05). In a regression model of creatinine at 1 year the significant variables were the presence of DGF, donor age greater than 50, greater than two rejection episodes, DR mismatch, donor female to male recipient sex, IL-10 high genotype, and IFN-γ high genotype. Conclusion: The 12 CA repeat IFN-γ polymorphic allele is associated with high IFN-γ production. We have shown that this high producer genotype for IFN-γ influences acute rejection in kidney transplantation, particularly in high-risk groups; it is also associated with worse long-term graft function.

The overarching goal of this study was to develop a method to measure solid matrix stress, ex vivo, in the articular cartilage of three cadaveric human hip joints. The primary objectives were to establish the day to day repeatability of the method over three sequential days of testing before resecting the labrum on the fourth day to observe changes in joint behavior. Three to six fiber optic contact stress sensors were inserted within the middle zone of the acetabular cartilage to measure solid matrix stress in three hemipelvis hip specimens. A fiber optic hydrostatic fluid pressure sensor was used to simultaneously measure the synovial fluid pressure in the fossa while a representative physiological load was applied using a materials testing machine. Once inserted, the location of all sensors was quantified using a radio-stereometric analysis technique showing good repeatability of sensor location. The target radial positions of contact stress sensors were 0º, 25º, and 50º anterior of the AIIS and the observed positions were -1º ± 5º, 27º ± 3º and 56º ± 14º. Measurements of 0.26 ± 0.13 MPa and 0.440 ± 0.14 MPa for peak hydrostatic synovial fluid pressure show poor repeatability and no consistent change was observed after labral resection. Two contact stress sensors measured positive solid matrix stress values of 0.21 MPa and 0.69 MPa which agree with the findings of a similar experiment, however, poor day to day repeatability was observed. The difference between maximum and minimum stress values tended to be lower, and the nominal maximum solid matrix stress value higher, on the final day of testing after labral resection. No clear, consistent difference in the mean value of the solid matrix stress at the end of the test was found between tests with the intact labrum and after labral resection. Significant cross-sensitivity artifact is suspected in the solid matrix stress measurements significantly limiting the results. Several recommendations to improve upon these limitations in future work have been identified. Despite challenges during the experimental work and poor repeatability of measurements from the fiber optic sensors, incremental advances were made toward achieving the goal of developing a measurement system for cartilage solid matrix stress in the hip. / Graduate

No description available.

<p> Though it is well established that insects are attracted to decomposing vertebrates, little is known about the mechanism of attraction. Olfaction is thought to be the primary sense involved in resource location by necrophilous insects, and several studies have attempted to identify cadaveric-produced volatile organic compounds (VOCs) that contribute to insect attraction. This previous research has been completed almost exclusively in lab settings, with no field studies to verify these findings. </p><p> The goal of my thesis was to test necrophilous insect attraction to nine cadaveric VOCs (1-butanol, 1-pentanol, <i>p­</i>-xylene, <i>o</i>-xylene, ethanol, cyclohexanone, acetamide, dimethyl disulfide, and dimethyl trisulfide) in a field setting. Pitfall traps at six research locations were baited with the chemicals for one week. Specimens collected from the traps were identified and species assemblages were compared to those of a pig carcass. Replicates were conducted in fall 2018 and spring 2019. </p><p> Two chemicals were identified as important attractants for a variety of necrophilous insects: dimethyl disulfide and dimethyl trisulfide. These chemicals were especially attractive to <i>Phormia regina</i>, a blow fly (Diptera: Calliphoridae) found worldwide. VOC insect communities did not include all of the insects found on carcasses, possibly indicating the necessity of chemical blends for effective attraction. This study is only the second study to test necrophilous insect attraction in a field setting. </p>

No description available.

No description available.

South Africans are in dire need of organs and tissues for transplantation. The impact is felt by many, irrespective of colour, creed or religion. No known studies have been conducted amongst Baptists in South Africa to determine their point of view on the subject. My own personal experience as both a Baptist pastor and now as procurement operations manager of a bone tissue centre, has shown that most people are ignorant and uninformed about bone tissue donation and also, to a lesser degree about organ donation. This study seeks to ascertain what a representative group of Baptist delegates who attended the annual Northern Baptist Association Assembly in June 2005 think about organ and tissue donation. Their views were obtained by means of an empirical study. The results are interpreted to determine if they are in favour of or against organ and tissue donation. It is important to note their beliefs regarding the Scriptural position on donation and whether Christians could be encouraged from the Word to become organ and tissue donors or not. Donation of organs and tissue benefits not only the recipient or patient, but also affects the donor family, or next-of-kin. The study aims to determine if the respondents felt that organ and tissue donation holds pastoral benefits to the donor families and recipients. Baptists and other Christian denominations have a responsibility to preach God’s Word and to apply it to real-world situations. Death and donation of organs and tissue is a reality that our people face, often unprepared and less than properly informed. I trust that the findings of this study will be of assistance to pastors and teachers whose desire it is to inform and educate their congregations about the selfless gift of organ and tissue donation. / Dissertation (MA (Research in Practical Theology))--University of Pretoria, 2007. / Practical Theology / MA / unrestricted

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No description available.

A interpretação dos achados laboratoriais no estabelecimento da causa mortis consiste na integração dos conhecimentos sobre a toxicocinética e toxicodinâmica do agente, conhecimentos de sua redistribuição post mortem (RPM) e achados necroscópicos que possibilitem o nexo causal entre o toxicante e o efeito letal. Neste sentido, é importante considerar que somente as concentrações de cocaína (COC) e seus metabólitos podem não ser determinantes na interpretação da causa de morte, podendo ser útil o cotejamento com outros parâmetros, como os níveis de neurotrasmissores que representem o mecanismo de ação do fármaco. Assim, este trabalho teve por objetivo investigar a RPM da COC e seu metabólito benzoilecgonina (BE) em três segmentos do tecido encefálico (TE), no humor vítreo (HV) e sangue (SG), bem como determinar as concentrações de catecolaminas e indolaminas no encéfalo para avaliar a aplicação da neuroquímica post mortem (NPM) na toxicologia forense. No estudo de RPM foram quantificados os níveis de COC e BE em três segmentos do TE (córtex frontal, núcleos da base e cerebelo), no HV e no SG através de método por cromatografia líquida de alta eficiência (HPLC) acoplada ao detector de arranjo de diodos. Os estudos de neuroquímica foram realizados empregando-se HPLC acoplada ao detector eletroquímico. Os resultados indicaram que as concentrações médias de COC foram maiores no TE, seguido por SG e HV (3,09, 2,92 e 1,71 &#181;g/mL, respectivamente), enquanto para BE foram maiores em SG, seguido por HV e TE (6,12, 1,39 e 0,87 &#181;g/mL, respectivamente). As concentrações de COC se apresentaram distribuídas uniformemente nos três segmentos de TE e apresentaram alta correlação com o HV. Adicionalmente, a média de concentrações de dopamina total foi maior no grupo de indivíduos com amostras positivas para COC, sendo verificado diferença significativa entre este grupo e o de indivíduos com amostras negativas para o fármaco de interesse. Os resultados demostraram que o estudo de RPM e da NPM constituem ferramentas aplicáveis na interpretação da causa e maneira de morte. / In case of intoxication, the interpretation of analytical results to assess the cause and process of death requires knowledge about toxicokinetics, toxicodynamic, postmortem redistribution, and autopsy elements. Cocaine-related deaths occur mainly after prolonged drugs use and the presence of cocaine (COC) in fluids or tissues does not prove that death was due to COC consumption, and the interpretation of postmortem concentrations is even more complicated than attempts at making such correlations in the living. The objectives of this study were to investigate the post mortem redistribution (PMR) of COC and its metabolite benzoylecgonine (BE) in three segments of brain (frontal cortex, base nucleous, and cerebellum), vitreous humor, and blood. In additional, catecholamines and indolamines were quantified in brain in order to evaluate the usefulness of post mortem neurochemistry (PMN) in forensic toxicology. In PMR studies were quantified the COC and BE levels in three brain (BR) segments, in vitreous humor (VH), and blood (BL) by High Performance Liquid Chromatography (HPLC) with diode array detection, and for neurochemistry studies the neurotransmitters were quantified by HPLC with electrochemical detection. A homogenous distribution of COC and BE within frontal cortex, base nucleous, and cerebellum was found. The COC media concentrations were 3.09, 2.92 e 1.71&#181;g/mL in BR, BL and VH, respectively, and the BE media concentrations were 6.12, 1.39 e 0.87 &#181;g/mL in BL, VH, and BR, respectively. The COC concentrations in VH show high correlation with brain. The media total dopamine concentration was significant higher in COC positive group. These findings suggest that the studies of PMR and PMN by neurotransmitters levels may be useful to assess the cause and process of death.