934 resultados para QUANTITATIVE GENETIC-ANALYSIS


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Pós-graduação em Ciência Florestal - FCA

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Pós-graduação em Ciências Biológicas (Zoologia) - IBB

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Pós-graduação em Genética e Melhoramento Animal - FCAV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Background: Next-generation sequencing (NGS) allows for sampling numerous viral variants from infected patients. This provides a novel opportunity to represent and study the mutational landscape of Hepatitis C Virus (HCV) within a single host.Results: Intra-host variants of the HCV E1/E2 region were extensively sampled from 58 chronically infected patients. After NGS error correction, the average number of reads and variants obtained from each sample were 3202 and 464, respectively. The distance between each pair of variants was calculated and networks were created for each patient, where each node is a variant and two nodes are connected by a link if the nucleotide distance between them is 1. The work focused on large components having > 5% of all reads, which in average account for 93.7% of all reads found in a patient. The distance between any two variants calculated over the component correlated strongly with nucleotide distances (r = 0.9499; p = 0.0001), a better correlation than the one obtained with Neighbour-Joining trees (r = 0.7624; p = 0.0001). In each patient, components were well separated, with the average distance between (6.53%) being 10 times greater than within each component (0.68%). The ratio of nonsynonymous to synonymous changes was calculated and some patients (6.9%) showed a mixture of networks under strong negative and positive selection. All components were robust to in silico stochastic sampling; even after randomly removing 85% of all reads, the largest connected component in the new subsample still involved 82.4% of remaining nodes. In vitro sampling showed that 93.02% of components present in the original sample were also found in experimental replicas, with 81.6% of reads found in both. When syringe-sharing transmission events were simulated, 91.2% of all simulated transmission events seeded all components present in the source.Conclusions: Most intra-host variants are organized into distinct single-mutation components that are: well separated from each other, represent genetic distances between viral variants, robust to sampling, reproducible and likely seeded during transmission events. Facilitated by NGS, large components offer a novel evolutionary framework for genetic analysis of intra-host viral populations and understanding transmission, immune escape and drug resistance.

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Dengue virus is a major public health problem worldwide. Aedes (Stegomyia) aegypti is the main dengue vector. Since there is no specific treatment or effective vaccine, control measure is focused on vector control. It is believed that population density is higher in the warmer/rainy season than in cold/dry. The study aimed to genetically characterize population dynamics of Ae. aegypti during climatic variations. Collections were performed at least once in both periods over five years by oviposition traps at Botucatu city. The technique of TaqMan allelic discrimination was used for genetic analysis, in which SNPs from nine genes distributed on three chromosomes of the mosquito were genotyped. Bayesian analysis did not show variance on population structure over the five year period. The percentage of variation among samples in statistical analysis was low (Fst = 0.0028, p = 0.7634), furthermore the allele frequencies were constant. The results show that despite wide variation in the density of adults, population size does not vary. Therefore, there is variation in the prevalence of the species life stages: adults in warmer/rainy, and possibly eggs in cold/dry, resulting in different control strategies for each period. Moreover, estimation of population size should not consider only winged adults, but all other found life stages forms

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The Hypertension Arterial Gestationis is a of largest complications to the pregnant women, a time that is associated with to high risk of morbimortalidade fetal and maternal ;the term If referred the levels pressure equal or above of 140mmhg to the pressure systolic and of 90mmhg to the pressure diastolic (1).Hypertension in pregnancy can be classified into gestational hypertension, chronic hypertension, preeclampsia and eclampsia(3). This study aimed to calculate and analyze the cost of care of newborns of hypertensive mothers hospitalized in rooming, nursery and the neonatal intensive care unit (Neonatal UTI). It’s a study of exploratory, descriptive and quantitative data analysis, in newborns of mothers with hypertension, who underwent prenatal care in HCFMB, from January 1 to 31 in December 2010. The data analysis showed that the cost of care for newborn in rooming was R$ 38.62 for the control group and groups of hypertensive mothers were R$ 19.93 to R$ 37.38. The costs of care to the newborn in the nursery were R$ 1,781.81 for the control group and groups of hypertensive mothers were R$ 680.03 to 7544.10. The costs for the newborn who Neonatal UTI were R$ 7,468.60 for the control group and groups of hypertensive mothers were R$ 5,228.02 to R $ 18,372.75. The total costs of care for newborn in rooming, nursery and Neonatal UTI were R$ 916.15 for the control group, R$ 1,385.98 for the HAC group, R$ 327.23 for the group HAS, R$ 3,896.57 for the group of preeclampsia and R$ 6,326.54 for the group of eclampsia. Considerations It can be concluded that the costs of mothers with preeclampsia and eclampsia were higher, being conditions with increased risk of maternal-fetal morbidity / mortality, requiring care in intensive care unit and longer stay in hospital