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| Guerreiro,João Farias; Ribeiro-dos-Santos,Ândrea Kely Campos; Santos,Eduardo José Melo dos; Vallinoto,Antonio Carlos Rosário; Cayres-Vallinoto,Izaura Maria Vieira; Aguiar,Gilberto Ferreira de Souza; Santos,Sidney Emanuel Batista dos. |
| The Amazon region of Brazil includes communities founded by escaped slaves, some of which still remain relatively isolated. We studied two such Afro-Brazilian communities (Pacoval and Curiau), in the rural area of Alenquer, Pará, and in the metropolitan region of Macapá, Amapá, respectively. Among 12 blood loci, alleles considered as markers of African ancestry, such as HBB*S, HBB*C, TF*D1, HP*2M, ABO*B, RH*D-, and CA2*2 were found at frequencies that are expected for populations with a predominantly African origin. Estimates of interethnic admixture indicated that the degree of the African component in Curiau (74%) is higher than that of Pacoval (44%); an Amerindian contribution was not detected in Curiau. Estimated values of African ancestry fit well... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000200004 |
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| Carvalhaes,Fernanda Andreza de Pinho Lott; Cardoso,Greice Lemos; Vallinoto,Antonio Carlos Rosário; Machado,Luiz Fernando; Ishak,Marluisa de Oliveira Guimarães; Ishak,Ricardo; Guerreiro,João Farias. |
| The distribution of genetic polymorphisms of chemokine receptors CCR5-delta32, CCR2-64I and chemokine (SDF1-3A) mutations were studied in 110 Human Immunodeficiency Virus type 1 (HIV-1) seropositive individuals (seropositive group) and 139 seronegative individuals (seronegative group) from the population of the northern Brazilian city of Belém which is the capital of the state of Pará in the Brazilian Amazon. The CCR5-delta32 mutation was found in the two groups at similar frequencies, i.e. 2.2% for the seronegative group and 2.7% for the seropositive group. The frequencies of the SDF1-3A mutation were 21.0% for the seronegative group and 15.4% for the seropositive group, and the CCR2-64I allele was found at frequencies of 12.5% for the seronegative... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: CCR5; CCR2; SDF-1; HIV-1 infection; Allele frequency; Brazilian Amazon. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500004 |
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| Vallinoto,Izaura Maria Vieira Cayres; Vallinoto,Antonio Carlos Rosário; Valente,Cristina Maria Duarte; Guerreiro,João Farias. |
| The allele frequency distributions of three VNTR (D1S80, APOB and D4S43) and three STR (vW1, F13A1 and DYS19) loci were investigated in two Afro-Brazilian populations from the Amazon: Curiau and Pacoval. Exact tests for population differentiation revealed significant differences in allele frequency between populations only for the D1S80 and APOB loci. A statistically significant deviation from the Hardy-Weinberg equilibrium was observed only in the D1S80 locus of the Pacoval sample. A neighbor-joining tree was constructed based on DA genetic distances of allele frequencies in four Afro-Brazilian populations from the Amazon (Pacoval, Curiau, Trombetas, and Cametá), along with those from Congo, Cameroon, Brazilian Amerindians, and Europeans. This analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DNA polymorphisms; Afro-Brazilians; Hypervariable loci. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300003 |
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| Cayres-Vallinoto,Izaura Maria Vieira; Vallinoto,Antonio Carlos Rosário; Pena,Giselle Priscila dos Anjos; Azevedo,Vânia Nakauth; Machado,Luiz Fernando Almeida; Ishak,Marluísa de Oliveira Guimarães; Ishak,Ricardo. |
| Abstract JC virus (JCV) is a member of the Polyomaviridae family and is associated to a severe disease known as progressive multifocal leukoencephalopathy, PML, which is gradually increasing in incidence as an opportunistic infection among AIDS patients. The present study aimed to investigate the occurrence of JCV among HIV-1 carriers including their types and molecular subtypes and the possible association with disease. Urine samples from 66 HIV-1 infected subjects were investigated for the presence of the virus by amplifying VP1 (215 bp) and IG (610 bp) regions using the polymerase chain reaction. JCV was detected in 32% of the samples. The results confirmed the occurrence of type B (subtype Af2); in addition, another polyomavirus, BKV, was also detected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: JCV; HIV-1; Co-infection; Brazilian Amazon region. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000400360 |
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