RESUMEN
Previous studies have revealed a genetic component, including genetic polymorphisms in the serotonergic pathway, particularly in the serotonin receptor gene (5-HT2A). The aim of this study was to investigate associations of the T102C (rs6313) and A-1438G (rs6311) polymorphisms with tobacco use in a population from northeastern Brazil. We evaluated these polymorphisms in 135 nonsmokers and 135 smokers using polymerase chain reaction-restricted fragment length polymorphism. The distribution of allele and genotype frequencies and associations of polymorphisms with smoking were assessed with the chi-squared (χ(2)) test, the Fisher exact test, and odds ratio (OR) with a 95% confidence interval (CI). There were no differences in the distribution of genotype and allele frequencies between nonsmokers and smokers for A-1438G (P = 0.80) and T102C (P = 0.35). However, these polymorphisms were significantly associated with habit frequency (A/G: P = 0.02, OR = 6.87, 95%CI = 1.23-38.31, P = 0.04; A/G+G/G: P = 0.04, OR = 3.67, 95%CI = 1.06-12.75, P = 0.07), age of onset (C/C: P = 0.02, OR = 3.26, 95%CI = 1.17-9.07, P = 0.03, and nicotine dependence level (A/G: P = 0.02, OR = 3.28, 95%CI = 1.17-9.18, P = 0.04; A/G+G/G: P = 0.04, OR = 2.81, 95%CI = 1.13-6.99, P = 0.04; T/C: P = 0.03, OR = 3.12, 95%CI = 1.13-8.57, P = 0.04; T/C+C/C: P = 0.02, OR = 3.06, 95%CI = 1.22-7.70, P = 0.02). Therefore, these polymorphisms may not contribute significantly to smoking initiation, they do appear to be associated with habit maintenance.
Asunto(s)
Estudios de Asociación Genética , Polimorfismo Genético , Receptor de Serotonina 5-HT2A/genética , Fumar/genética , Adulto , Anciano , Alelos , Brasil , Estudios de Casos y Controles , Femenino , Frecuencia de los Genes , Genotipo , Haplotipos , Humanos , Desequilibrio de Ligamiento , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Polimorfismo de Nucleótido SimpleRESUMEN
Com base nos dados absolutos do Censo Agropecuário 2006, estruturou-se um sistema geográfico de informação e aplicou-se o método de análise multicritério para categorizar e avaliar o desenvolvimento da pecuária leiteira em Minas Gerais, Brasil. As variáveis selecionadas foram representadas espacialmente, classificadas e reclassificadas. Considerando-se seus pesos ponderados, foram combinadas por procedimentos de álgebra de mapas, em que se conformou o mapa com a caracterização do desenvolvimento leiteiro. Dos 853 municípios, 53 foram classificados como altamente desenvolvidos, 55 desenvolvidos, 229 moderadamente desenvolvidos, 500 pouco desenvolvidos e 16 não desenvolvidos. Encontrou-se associação entre o tamanho dos municípios e o desenvolvimento leiteiro; os de maior desenvolvimento tiveram área média de 175.414ha, e os de menor desenvolvimento apresentaram área média de 44.947ha. Esta abordagem para a integração espacial de dados censitários da pecuária possibilita uma nova forma de conhecer a realidade no seu desenvolvimento e promove sua aplicação em outros temas relacionados com a saúde e a produtividade animal...
Based on absolute data collected from the Agricultural census 2006 a Geographic Information System (GIS) and application of a multi-criteria analysis method to categorize and evaluate the development of dairy farming in Minas Gerais, Brazil. The selected variables were represented spatially, classified and reclassified; taking into account that their adjusted weights were combined by map algebra procedures, conforming the map with the characterization of the dairy development. Of the 853 municipalities, 53 were classified as highly developed, 55 developed, 229 moderately developed, 500 low development and 16 non-developed. Associations were found between the size of the municipalities and dairy development. The municipalities with greater development had an average area of 175.414 ha and those with lower development showed an average area of 44.947 ha. This approach with spatial integration of the livestock census data provides a powerful methodology to express the reality in its development and promotes this application in other topics related to animal health and productivity...
