Apolipoprotein E polymorphism distribution in an elderly Brazilian population: the Bambuí Health and Aging Study
Braz. j. med. biol. res
;
40(11): 1429-1434, Nov. 2007. graf, tab
Artigo
em Inglês
| LILACS
| ID: lil-464309
ABSTRACT
Apolipoprotein E (ApoE) is one of the most extensively studied genes in the context of aging, but there are few population-based studies on ApoE polymorphism in the elderly in developing countries. The objective of the present study was to assess ApoE allele and genotype distribution in a large elderly community-based sample and its association with age, sex and skin color. Participants included 1408 subjects (80.8 percent of all residents aged ³60 years) residing in Bambuí city, MG, Brazil. The DNA samples were subjected to the polymerase chain reaction amplification, followed by the restriction fragment length polymorphism technique, with digestion by HhaI. Analysis was carried out taking into consideration the six ApoE genotypes (e3/e3, e3/e4, e2/e3, e4/e4, e2/e4, and e2/e2), the three ApoE alleles, and the number of ApoE4 alleles for each individual. The e3 allele predominated (80.0 percent), followed by e4 (13.5 percent) and e2 (6.5 percent). All six possible genotypes were observed, the e3/e3 genotype being the most frequent (63.4 percent). This distribution was similar to that described in other western populations. Sex was not associated with number of ApoE4 alleles. Black skin color was significantly and independently associated with the presence of two ApoE4 alleles (age-sex adjusted OR = 7.38; 95 percentCI = 1.93-28.25), showing that the African-Brazilian elderly have a high prevalence of the e4 allele, as observed in blacks from Africa. No association between number of ApoE4 alleles and age was found, suggesting the absence of association of ApoE genotype with mortality in this population.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Apolipoproteínas E
/
Polimorfismo Genético
/
Frequência do Gene
Tipo de estudo:
Fatores de risco
Limite:
Idoso
/
Aged80
/
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Braz. j. med. biol. res
Assunto da revista:
Biologia
/
Medicina
Ano de publicação:
2007
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
CMIC Brasil Pesquisas Clínicas/BR
/
Universidade Federal de Minas Gerais/BR
Similares
MEDLINE
...
LILACS
LIS