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Absence of linkage between MHC and a gene involved in susceptibility to human schistosomiasis BJMBR
Chiarella,J.M.; Goldberg,A.C.; Abel,L.; Carvalho,E.M.; Kalil,J.; Dessein,A..
Six hundred million people are at risk of infection by Schistosoma mansoni. MHC haplotypes have been reported to segregate with susceptibility to schistosomiasis in murine models. In humans, a major gene related to susceptibility/resistance to infection by S. mansoni (SM1) and displaying the mean fecal egg count as phenotype was detected by segregation analysis. This gene displayed a codominant mode of inheritance with an estimated frequency of 0.20-0.25 for the deleterious allele and accounted for more than 50% of the variance of infection levels. To determine if the SM1 gene segregates with the human MHC chromosomal region, we performed a linkage study by the lod score method. We typed for HLA-A, B, C, DR and DQ antigens in 11 informative families from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: HLA; Linkage study; Human schistosomiasis.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000500010
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Molecular typing of HLA class II antigens in a São Paulo population Genet. Mol. Biol.
Goldberg,A.C.; Chiarella,J.M.; Marin,M.L.C.; Rosales,C.; Banic,D.; Oliveira,M.A.; Rodrigues,H.; Viggiani,C.S.; Kalil,J..
In the present paper we show data obtained from a normal population with a racially mixed profile typical of the city of São Paulo, State of São Paulo. Data were generated with polymerase chain reaction using sequence specific primers (PCR-SSP) for HLA-DRB and polymerase chain reaction followed by hybridization with sequence specific oligonucleotide probes (PCR-SSO) for HLA-DQA1 and HLA-DQB1 loci. HLA-DRB, DQA1, DQB1 and haplotype frequencies as well as common linkage disequilibria were found. This population was also shown to be in genetic equilibrium according to the Hardy-Weinberg law. HLA-DR typing of a normal sample from the city of Porto Velho, State of Rondonia, highlighted the importance of different sets of HLA profiles found in other regions of...
Tipo: Info:eu-repo/semantics/article
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000300001
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